Members/tobaru/cbc/CbC_llvm: lib/Analysis/BlockFrequencyInfoImpl.cpp annotate

annotate lib/Analysis/BlockFrequencyInfoImpl.cpp @ 128:c347d3398279 default tip

fix

author	mir3636
date	Wed, 06 Dec 2017 14:37:17 +0900
parents	803732b1fca8
children

rev	line source
77 54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	1 //===- BlockFrequencyImplInfo.cpp - Block Frequency Info Implementation ---===//
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	2 //
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	3 // The LLVM Compiler Infrastructure
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	4 //
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	5 // This file is distributed under the University of Illinois Open Source
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	6 // License. See LICENSE.TXT for details.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	7 //
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	8 //===----------------------------------------------------------------------===//
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	9 //
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	10 // Loops should be simplified before this analysis.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	11 //
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	12 //===----------------------------------------------------------------------===//
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	13
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	14 #include "llvm/Analysis/BlockFrequencyInfoImpl.h"
121 803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	15 #include "llvm/ADT/APInt.h"
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	16 #include "llvm/ADT/DenseMap.h"
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	17 #include "llvm/ADT/GraphTraits.h"
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	18 #include "llvm/ADT/None.h"
77 54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	19 #include "llvm/ADT/SCCIterator.h"
120 1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	20 #include "llvm/IR/Function.h"
121 803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	21 #include "llvm/Support/BlockFrequency.h"
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	22 #include "llvm/Support/BranchProbability.h"
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	23 #include "llvm/Support/Compiler.h"
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	24 #include "llvm/Support/Debug.h"
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	25 #include "llvm/Support/ScaledNumber.h"
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	26 #include "llvm/Support/MathExtras.h"
77 54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	27 #include "llvm/Support/raw_ostream.h"
121 803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	28 #include <algorithm>
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	29 #include <cassert>
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	30 #include <cstddef>
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	31 #include <cstdint>
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	32 #include <iterator>
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	33 #include <list>
83 60c9769439b8 LLVM 3.7 Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp> parents: 77 diff changeset	34 #include <numeric>
121 803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	35 #include <utility>
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	36 #include <vector>
77 54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	37
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	38 using namespace llvm;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	39 using namespace llvm::bfi_detail;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	40
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	41 #define DEBUG_TYPE "block-freq"
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	42
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	43 ScaledNumber<uint64_t> BlockMass::toScaled() const {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	44 if (isFull())
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	45 return ScaledNumber<uint64_t>(1, 0);
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	46 return ScaledNumber<uint64_t>(getMass() + 1, -64);
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	47 }
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	48
121 803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	49 #if !defined(NDEBUG) \|\| defined(LLVM_ENABLE_DUMP)
120 1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	50 LLVM_DUMP_METHOD void BlockMass::dump() const { print(dbgs()); }
121 803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	51 #endif
77 54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	52
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	53 static char getHexDigit(int N) {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	54 assert(N < 16);
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	55 if (N < 10)
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	56 return '0' + N;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	57 return 'a' + N - 10;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	58 }
120 1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	59
77 54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	60 raw_ostream &BlockMass::print(raw_ostream &OS) const {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	61 for (int Digits = 0; Digits < 16; ++Digits)
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	62 OS << getHexDigit(Mass >> (60 - Digits * 4) & 0xf);
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	63 return OS;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	64 }
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	65
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	66 namespace {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	67
121 803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	68 using BlockNode = BlockFrequencyInfoImplBase::BlockNode;
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	69 using Distribution = BlockFrequencyInfoImplBase::Distribution;
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	70 using WeightList = BlockFrequencyInfoImplBase::Distribution::WeightList;
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	71 using Scaled64 = BlockFrequencyInfoImplBase::Scaled64;
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	72 using LoopData = BlockFrequencyInfoImplBase::LoopData;
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	73 using Weight = BlockFrequencyInfoImplBase::Weight;
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	74 using FrequencyData = BlockFrequencyInfoImplBase::FrequencyData;
77 54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	75
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	76 /// \brief Dithering mass distributer.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	77 ///
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	78 /// This class splits up a single mass into portions by weight, dithering to
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	79 /// spread out error. No mass is lost. The dithering precision depends on the
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	80 /// precision of the product of \a BlockMass and \a BranchProbability.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	81 ///
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	82 /// The distribution algorithm follows.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	83 ///
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	84 /// 1. Initialize by saving the sum of the weights in \a RemWeight and the
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	85 /// mass to distribute in \a RemMass.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	86 ///
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	87 /// 2. For each portion:
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	88 ///
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	89 /// 1. Construct a branch probability, P, as the portion's weight divided
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	90 /// by the current value of \a RemWeight.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	91 /// 2. Calculate the portion's mass as \a RemMass times P.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	92 /// 3. Update \a RemWeight and \a RemMass at each portion by subtracting
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	93 /// the current portion's weight and mass.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	94 struct DitheringDistributer {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	95 uint32_t RemWeight;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	96 BlockMass RemMass;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	97
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	98 DitheringDistributer(Distribution &Dist, const BlockMass &Mass);
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	99
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	100 BlockMass takeMass(uint32_t Weight);
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	101 };
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	102
120 1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	103 } // end anonymous namespace
77 54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	104
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	105 DitheringDistributer::DitheringDistributer(Distribution &Dist,
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	106 const BlockMass &Mass) {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	107 Dist.normalize();
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	108 RemWeight = Dist.Total;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	109 RemMass = Mass;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	110 }
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	111
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	112 BlockMass DitheringDistributer::takeMass(uint32_t Weight) {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	113 assert(Weight && "invalid weight");
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	114 assert(Weight <= RemWeight);
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	115 BlockMass Mass = RemMass * BranchProbability(Weight, RemWeight);
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	116
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	117 // Decrement totals (dither).
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	118 RemWeight -= Weight;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	119 RemMass -= Mass;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	120 return Mass;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	121 }
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	122
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	123 void Distribution::add(const BlockNode &Node, uint64_t Amount,
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	124 Weight::DistType Type) {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	125 assert(Amount && "invalid weight of 0");
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	126 uint64_t NewTotal = Total + Amount;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	127
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	128 // Check for overflow. It should be impossible to overflow twice.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	129 bool IsOverflow = NewTotal < Total;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	130 assert(!(DidOverflow && IsOverflow) && "unexpected repeated overflow");
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	131 DidOverflow \|= IsOverflow;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	132
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	133 // Update the total.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	134 Total = NewTotal;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	135
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	136 // Save the weight.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	137 Weights.push_back(Weight(Type, Node, Amount));
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	138 }
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	139
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	140 static void combineWeight(Weight &W, const Weight &OtherW) {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	141 assert(OtherW.TargetNode.isValid());
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	142 if (!W.Amount) {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	143 W = OtherW;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	144 return;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	145 }
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	146 assert(W.Type == OtherW.Type);
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	147 assert(W.TargetNode == OtherW.TargetNode);
83 60c9769439b8 LLVM 3.7 Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp> parents: 77 diff changeset	148 assert(OtherW.Amount && "Expected non-zero weight");
60c9769439b8 LLVM 3.7 Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp> parents: 77 diff changeset	149 if (W.Amount > W.Amount + OtherW.Amount)
60c9769439b8 LLVM 3.7 Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp> parents: 77 diff changeset	150 // Saturate on overflow.
60c9769439b8 LLVM 3.7 Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp> parents: 77 diff changeset	151 W.Amount = UINT64_MAX;
60c9769439b8 LLVM 3.7 Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp> parents: 77 diff changeset	152 else
60c9769439b8 LLVM 3.7 Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp> parents: 77 diff changeset	153 W.Amount += OtherW.Amount;
77 54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	154 }
120 1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	155
77 54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	156 static void combineWeightsBySorting(WeightList &Weights) {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	157 // Sort so edges to the same node are adjacent.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	158 std::sort(Weights.begin(), Weights.end(),
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	159 [](const Weight &L,
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	160 const Weight &R) { return L.TargetNode < R.TargetNode; });
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	161
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	162 // Combine adjacent edges.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	163 WeightList::iterator O = Weights.begin();
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	164 for (WeightList::const_iterator I = O, L = O, E = Weights.end(); I != E;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	165 ++O, (I = L)) {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	166 O = I;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	167
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	168 // Find the adjacent weights to the same node.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	169 for (++L; L != E && I->TargetNode == L->TargetNode; ++L)
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	170 combineWeight(O, L);
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	171 }
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	172
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	173 // Erase extra entries.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	174 Weights.erase(O, Weights.end());
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	175 }
120 1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	176
77 54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	177 static void combineWeightsByHashing(WeightList &Weights) {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	178 // Collect weights into a DenseMap.
121 803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	179 using HashTable = DenseMap<BlockNode::IndexType, Weight>;
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	180
77 54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	181 HashTable Combined(NextPowerOf2(2 * Weights.size()));
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	182 for (const Weight &W : Weights)
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	183 combineWeight(Combined[W.TargetNode.Index], W);
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	184
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	185 // Check whether anything changed.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	186 if (Weights.size() == Combined.size())
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	187 return;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	188
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	189 // Fill in the new weights.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	190 Weights.clear();
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	191 Weights.reserve(Combined.size());
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	192 for (const auto &I : Combined)
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	193 Weights.push_back(I.second);
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	194 }
120 1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	195
77 54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	196 static void combineWeights(WeightList &Weights) {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	197 // Use a hash table for many successors to keep this linear.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	198 if (Weights.size() > 128) {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	199 combineWeightsByHashing(Weights);
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	200 return;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	201 }
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	202
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	203 combineWeightsBySorting(Weights);
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	204 }
120 1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	205
77 54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	206 static uint64_t shiftRightAndRound(uint64_t N, int Shift) {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	207 assert(Shift >= 0);
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	208 assert(Shift < 64);
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	209 if (!Shift)
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	210 return N;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	211 return (N >> Shift) + (UINT64_C(1) & N >> (Shift - 1));
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	212 }
120 1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	213
77 54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	214 void Distribution::normalize() {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	215 // Early exit for termination nodes.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	216 if (Weights.empty())
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	217 return;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	218
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	219 // Only bother if there are multiple successors.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	220 if (Weights.size() > 1)
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	221 combineWeights(Weights);
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	222
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	223 // Early exit when combined into a single successor.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	224 if (Weights.size() == 1) {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	225 Total = 1;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	226 Weights.front().Amount = 1;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	227 return;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	228 }
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	229
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	230 // Determine how much to shift right so that the total fits into 32-bits.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	231 //
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	232 // If we shift at all, shift by 1 extra. Otherwise, the lower limit of 1
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	233 // for each weight can cause a 32-bit overflow.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	234 int Shift = 0;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	235 if (DidOverflow)
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	236 Shift = 33;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	237 else if (Total > UINT32_MAX)
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	238 Shift = 33 - countLeadingZeros(Total);
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	239
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	240 // Early exit if nothing needs to be scaled.
83 60c9769439b8 LLVM 3.7 Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp> parents: 77 diff changeset	241 if (!Shift) {
60c9769439b8 LLVM 3.7 Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp> parents: 77 diff changeset	242 // If we didn't overflow then combineWeights() shouldn't have changed the
60c9769439b8 LLVM 3.7 Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp> parents: 77 diff changeset	243 // sum of the weights, but let's double-check.
60c9769439b8 LLVM 3.7 Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp> parents: 77 diff changeset	244 assert(Total == std::accumulate(Weights.begin(), Weights.end(), UINT64_C(0),
60c9769439b8 LLVM 3.7 Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp> parents: 77 diff changeset	245 [](uint64_t Sum, const Weight &W) {
60c9769439b8 LLVM 3.7 Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp> parents: 77 diff changeset	246 return Sum + W.Amount;
60c9769439b8 LLVM 3.7 Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp> parents: 77 diff changeset	247 }) &&
60c9769439b8 LLVM 3.7 Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp> parents: 77 diff changeset	248 "Expected total to be correct");
77 54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	249 return;
83 60c9769439b8 LLVM 3.7 Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp> parents: 77 diff changeset	250 }
77 54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	251
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	252 // Recompute the total through accumulation (rather than shifting it) so that
83 60c9769439b8 LLVM 3.7 Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp> parents: 77 diff changeset	253 // it's accurate after shifting and any changes combineWeights() made above.
77 54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	254 Total = 0;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	255
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	256 // Sum the weights to each node and shift right if necessary.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	257 for (Weight &W : Weights) {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	258 // Scale down below UINT32_MAX. Since Shift is larger than necessary, we
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	259 // can round here without concern about overflow.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	260 assert(W.TargetNode.isValid());
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	261 W.Amount = std::max(UINT64_C(1), shiftRightAndRound(W.Amount, Shift));
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	262 assert(W.Amount <= UINT32_MAX);
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	263
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	264 // Update the total.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	265 Total += W.Amount;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	266 }
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	267 assert(Total <= UINT32_MAX);
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	268 }
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	269
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	270 void BlockFrequencyInfoImplBase::clear() {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	271 // Swap with a default-constructed std::vector, since std::vector<>::clear()
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	272 // does not actually clear heap storage.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	273 std::vector<FrequencyData>().swap(Freqs);
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	274 std::vector<WorkingData>().swap(Working);
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	275 Loops.clear();
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	276 }
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	277
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	278 /// \brief Clear all memory not needed downstream.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	279 ///
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	280 /// Releases all memory not used downstream. In particular, saves Freqs.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	281 static void cleanup(BlockFrequencyInfoImplBase &BFI) {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	282 std::vector<FrequencyData> SavedFreqs(std::move(BFI.Freqs));
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	283 BFI.clear();
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	284 BFI.Freqs = std::move(SavedFreqs);
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	285 }
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	286
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	287 bool BlockFrequencyInfoImplBase::addToDist(Distribution &Dist,
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	288 const LoopData *OuterLoop,
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	289 const BlockNode &Pred,
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	290 const BlockNode &Succ,
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	291 uint64_t Weight) {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	292 if (!Weight)
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	293 Weight = 1;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	294
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	295 auto isLoopHeader = [&OuterLoop](const BlockNode &Node) {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	296 return OuterLoop && OuterLoop->isHeader(Node);
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	297 };
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	298
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	299 BlockNode Resolved = Working[Succ.Index].getResolvedNode();
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	300
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	301 #ifndef NDEBUG
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	302 auto debugSuccessor = [&](const char *Type) {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	303 dbgs() << " =>"
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	304 << " [" << Type << "] weight = " << Weight;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	305 if (!isLoopHeader(Resolved))
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	306 dbgs() << ", succ = " << getBlockName(Succ);
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	307 if (Resolved != Succ)
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	308 dbgs() << ", resolved = " << getBlockName(Resolved);
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	309 dbgs() << "\n";
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	310 };
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	311 (void)debugSuccessor;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	312 #endif
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	313
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	314 if (isLoopHeader(Resolved)) {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	315 DEBUG(debugSuccessor("backedge"));
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	316 Dist.addBackedge(Resolved, Weight);
77 54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	317 return true;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	318 }
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	319
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	320 if (Working[Resolved.Index].getContainingLoop() != OuterLoop) {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	321 DEBUG(debugSuccessor(" exit "));
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	322 Dist.addExit(Resolved, Weight);
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	323 return true;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	324 }
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	325
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	326 if (Resolved < Pred) {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	327 if (!isLoopHeader(Pred)) {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	328 // If OuterLoop is an irreducible loop, we can't actually handle this.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	329 assert((!OuterLoop \|\| !OuterLoop->isIrreducible()) &&
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	330 "unhandled irreducible control flow");
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	331
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	332 // Irreducible backedge. Abort.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	333 DEBUG(debugSuccessor("abort!!!"));
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	334 return false;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	335 }
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	336
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	337 // If "Pred" is a loop header, then this isn't really a backedge; rather,
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	338 // OuterLoop must be irreducible. These false backedges can come only from
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	339 // secondary loop headers.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	340 assert(OuterLoop && OuterLoop->isIrreducible() && !isLoopHeader(Resolved) &&
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	341 "unhandled irreducible control flow");
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	342 }
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	343
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	344 DEBUG(debugSuccessor(" local "));
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	345 Dist.addLocal(Resolved, Weight);
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	346 return true;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	347 }
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	348
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	349 bool BlockFrequencyInfoImplBase::addLoopSuccessorsToDist(
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	350 const LoopData *OuterLoop, LoopData &Loop, Distribution &Dist) {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	351 // Copy the exit map into Dist.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	352 for (const auto &I : Loop.Exits)
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	353 if (!addToDist(Dist, OuterLoop, Loop.getHeader(), I.first,
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	354 I.second.getMass()))
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	355 // Irreducible backedge.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	356 return false;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	357
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	358 return true;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	359 }
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	360
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	361 /// \brief Compute the loop scale for a loop.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	362 void BlockFrequencyInfoImplBase::computeLoopScale(LoopData &Loop) {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	363 // Compute loop scale.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	364 DEBUG(dbgs() << "compute-loop-scale: " << getLoopName(Loop) << "\n");
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	365
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	366 // Infinite loops need special handling. If we give the back edge an infinite
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	367 // mass, they may saturate all the other scales in the function down to 1,
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	368 // making all the other region temperatures look exactly the same. Choose an
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	369 // arbitrary scale to avoid these issues.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	370 //
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	371 // FIXME: An alternate way would be to select a symbolic scale which is later
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	372 // replaced to be the maximum of all computed scales plus 1. This would
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	373 // appropriately describe the loop as having a large scale, without skewing
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	374 // the final frequency computation.
120 1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	375 const Scaled64 InfiniteLoopScale(1, 12);
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	376
77 54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	377 // LoopScale == 1 / ExitMass
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	378 // ExitMass == HeadMass - BackedgeMass
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	379 BlockMass TotalBackedgeMass;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	380 for (auto &Mass : Loop.BackedgeMass)
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	381 TotalBackedgeMass += Mass;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	382 BlockMass ExitMass = BlockMass::getFull() - TotalBackedgeMass;
77 54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	383
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	384 // Block scale stores the inverse of the scale. If this is an infinite loop,
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	385 // its exit mass will be zero. In this case, use an arbitrary scale for the
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	386 // loop scale.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	387 Loop.Scale =
120 1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	388 ExitMass.isEmpty() ? InfiniteLoopScale : ExitMass.toScaled().inverse();
77 54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	389
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	390 DEBUG(dbgs() << " - exit-mass = " << ExitMass << " (" << BlockMass::getFull()
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	391 << " - " << TotalBackedgeMass << ")\n"
77 54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	392 << " - scale = " << Loop.Scale << "\n");
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	393 }
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	394
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	395 /// \brief Package up a loop.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	396 void BlockFrequencyInfoImplBase::packageLoop(LoopData &Loop) {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	397 DEBUG(dbgs() << "packaging-loop: " << getLoopName(Loop) << "\n");
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	398
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	399 // Clear the subloop exits to prevent quadratic memory usage.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	400 for (const BlockNode &M : Loop.Nodes) {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	401 if (auto *Loop = Working[M.Index].getPackagedLoop())
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	402 Loop->Exits.clear();
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	403 DEBUG(dbgs() << " - node: " << getBlockName(M.Index) << "\n");
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	404 }
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	405 Loop.IsPackaged = true;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	406 }
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	407
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	408 #ifndef NDEBUG
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	409 static void debugAssign(const BlockFrequencyInfoImplBase &BFI,
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	410 const DitheringDistributer &D, const BlockNode &T,
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	411 const BlockMass &M, const char *Desc) {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	412 dbgs() << " => assign " << M << " (" << D.RemMass << ")";
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	413 if (Desc)
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	414 dbgs() << " [" << Desc << "]";
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	415 if (T.isValid())
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	416 dbgs() << " to " << BFI.getBlockName(T);
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	417 dbgs() << "\n";
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	418 }
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	419 #endif
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	420
77 54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	421 void BlockFrequencyInfoImplBase::distributeMass(const BlockNode &Source,
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	422 LoopData *OuterLoop,
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	423 Distribution &Dist) {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	424 BlockMass Mass = Working[Source.Index].getMass();
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	425 DEBUG(dbgs() << " => mass: " << Mass << "\n");
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	426
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	427 // Distribute mass to successors as laid out in Dist.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	428 DitheringDistributer D(Dist, Mass);
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	429
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	430 for (const Weight &W : Dist.Weights) {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	431 // Check for a local edge (non-backedge and non-exit).
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	432 BlockMass Taken = D.takeMass(W.Amount);
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	433 if (W.Type == Weight::Local) {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	434 Working[W.TargetNode.Index].getMass() += Taken;
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	435 DEBUG(debugAssign(*this, D, W.TargetNode, Taken, nullptr));
77 54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	436 continue;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	437 }
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	438
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	439 // Backedges and exits only make sense if we're processing a loop.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	440 assert(OuterLoop && "backedge or exit outside of loop");
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	441
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	442 // Check for a backedge.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	443 if (W.Type == Weight::Backedge) {
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	444 OuterLoop->BackedgeMass[OuterLoop->getHeaderIndex(W.TargetNode)] += Taken;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	445 DEBUG(debugAssign(*this, D, W.TargetNode, Taken, "back"));
77 54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	446 continue;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	447 }
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	448
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	449 // This must be an exit.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	450 assert(W.Type == Weight::Exit);
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	451 OuterLoop->Exits.push_back(std::make_pair(W.TargetNode, Taken));
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	452 DEBUG(debugAssign(*this, D, W.TargetNode, Taken, "exit"));
77 54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	453 }
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	454 }
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	455
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	456 static void convertFloatingToInteger(BlockFrequencyInfoImplBase &BFI,
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	457 const Scaled64 &Min, const Scaled64 &Max) {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	458 // Scale the Factor to a size that creates integers. Ideally, integers would
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	459 // be scaled so that Max == UINT64_MAX so that they can be best
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	460 // differentiated. However, in the presence of large frequency values, small
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	461 // frequencies are scaled down to 1, making it impossible to differentiate
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	462 // small, unequal numbers. When the spread between Min and Max frequencies
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	463 // fits well within MaxBits, we make the scale be at least 8.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	464 const unsigned MaxBits = 64;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	465 const unsigned SpreadBits = (Max / Min).lg();
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	466 Scaled64 ScalingFactor;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	467 if (SpreadBits <= MaxBits - 3) {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	468 // If the values are small enough, make the scaling factor at least 8 to
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	469 // allow distinguishing small values.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	470 ScalingFactor = Min.inverse();
77 54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	471 ScalingFactor <<= 3;
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	472 } else {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	473 // If the values need more than MaxBits to be represented, saturate small
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	474 // frequency values down to 1 by using a scaling factor that benefits large
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	475 // frequency values.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	476 ScalingFactor = Scaled64(1, MaxBits) / Max;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	477 }
77 54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	478
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	479 // Translate the floats to integers.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	480 DEBUG(dbgs() << "float-to-int: min = " << Min << ", max = " << Max
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	481 << ", factor = " << ScalingFactor << "\n");
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	482 for (size_t Index = 0; Index < BFI.Freqs.size(); ++Index) {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	483 Scaled64 Scaled = BFI.Freqs[Index].Scaled * ScalingFactor;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	484 BFI.Freqs[Index].Integer = std::max(UINT64_C(1), Scaled.toInt<uint64_t>());
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	485 DEBUG(dbgs() << " - " << BFI.getBlockName(Index) << ": float = "
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	486 << BFI.Freqs[Index].Scaled << ", scaled = " << Scaled
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	487 << ", int = " << BFI.Freqs[Index].Integer << "\n");
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	488 }
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	489 }
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	490
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	491 /// \brief Unwrap a loop package.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	492 ///
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	493 /// Visits all the members of a loop, adjusting their BlockData according to
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	494 /// the loop's pseudo-node.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	495 static void unwrapLoop(BlockFrequencyInfoImplBase &BFI, LoopData &Loop) {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	496 DEBUG(dbgs() << "unwrap-loop-package: " << BFI.getLoopName(Loop)
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	497 << ": mass = " << Loop.Mass << ", scale = " << Loop.Scale
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	498 << "\n");
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	499 Loop.Scale *= Loop.Mass.toScaled();
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	500 Loop.IsPackaged = false;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	501 DEBUG(dbgs() << " => combined-scale = " << Loop.Scale << "\n");
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	502
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	503 // Propagate the head scale through the loop. Since members are visited in
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	504 // RPO, the head scale will be updated by the loop scale first, and then the
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	505 // final head scale will be used for updated the rest of the members.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	506 for (const BlockNode &N : Loop.Nodes) {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	507 const auto &Working = BFI.Working[N.Index];
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	508 Scaled64 &F = Working.isAPackage() ? Working.getPackagedLoop()->Scale
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	509 : BFI.Freqs[N.Index].Scaled;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	510 Scaled64 New = Loop.Scale * F;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	511 DEBUG(dbgs() << " - " << BFI.getBlockName(N) << ": " << F << " => " << New
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	512 << "\n");
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	513 F = New;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	514 }
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	515 }
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	516
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	517 void BlockFrequencyInfoImplBase::unwrapLoops() {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	518 // Set initial frequencies from loop-local masses.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	519 for (size_t Index = 0; Index < Working.size(); ++Index)
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	520 Freqs[Index].Scaled = Working[Index].Mass.toScaled();
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	521
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	522 for (LoopData &Loop : Loops)
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	523 unwrapLoop(*this, Loop);
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	524 }
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	525
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	526 void BlockFrequencyInfoImplBase::finalizeMetrics() {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	527 // Unwrap loop packages in reverse post-order, tracking min and max
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	528 // frequencies.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	529 auto Min = Scaled64::getLargest();
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	530 auto Max = Scaled64::getZero();
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	531 for (size_t Index = 0; Index < Working.size(); ++Index) {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	532 // Update min/max scale.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	533 Min = std::min(Min, Freqs[Index].Scaled);
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	534 Max = std::max(Max, Freqs[Index].Scaled);
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	535 }
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	536
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	537 // Convert to integers.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	538 convertFloatingToInteger(*this, Min, Max);
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	539
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	540 // Clean up data structures.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	541 cleanup(*this);
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	542
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	543 // Print out the final stats.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	544 DEBUG(dump());
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	545 }
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	546
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	547 BlockFrequency
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	548 BlockFrequencyInfoImplBase::getBlockFreq(const BlockNode &Node) const {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	549 if (!Node.isValid())
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	550 return 0;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	551 return Freqs[Node.Index].Integer;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	552 }
120 1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	553
1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	554 Optional<uint64_t>
1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	555 BlockFrequencyInfoImplBase::getBlockProfileCount(const Function &F,
1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	556 const BlockNode &Node) const {
1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	557 return getProfileCountFromFreq(F, getBlockFreq(Node).getFrequency());
1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	558 }
1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	559
1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	560 Optional<uint64_t>
1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	561 BlockFrequencyInfoImplBase::getProfileCountFromFreq(const Function &F,
1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	562 uint64_t Freq) const {
1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	563 auto EntryCount = F.getEntryCount();
1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	564 if (!EntryCount)
1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	565 return None;
1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	566 // Use 128 bit APInt to do the arithmetic to avoid overflow.
1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	567 APInt BlockCount(128, EntryCount.getValue());
1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	568 APInt BlockFreq(128, Freq);
1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	569 APInt EntryFreq(128, getEntryFreq());
1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	570 BlockCount *= BlockFreq;
1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	571 BlockCount = BlockCount.udiv(EntryFreq);
1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	572 return BlockCount.getLimitedValue();
1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	573 }
1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	574
77 54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	575 Scaled64
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	576 BlockFrequencyInfoImplBase::getFloatingBlockFreq(const BlockNode &Node) const {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	577 if (!Node.isValid())
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	578 return Scaled64::getZero();
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	579 return Freqs[Node.Index].Scaled;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	580 }
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	581
100 7d135dc70f03 LLVM 3.9 Miyagi Mitsuki <e135756@ie.u-ryukyu.ac.jp> parents: 95 diff changeset	582 void BlockFrequencyInfoImplBase::setBlockFreq(const BlockNode &Node,
7d135dc70f03 LLVM 3.9 Miyagi Mitsuki <e135756@ie.u-ryukyu.ac.jp> parents: 95 diff changeset	583 uint64_t Freq) {
7d135dc70f03 LLVM 3.9 Miyagi Mitsuki <e135756@ie.u-ryukyu.ac.jp> parents: 95 diff changeset	584 assert(Node.isValid() && "Expected valid node");
7d135dc70f03 LLVM 3.9 Miyagi Mitsuki <e135756@ie.u-ryukyu.ac.jp> parents: 95 diff changeset	585 assert(Node.Index < Freqs.size() && "Expected legal index");
7d135dc70f03 LLVM 3.9 Miyagi Mitsuki <e135756@ie.u-ryukyu.ac.jp> parents: 95 diff changeset	586 Freqs[Node.Index].Integer = Freq;
7d135dc70f03 LLVM 3.9 Miyagi Mitsuki <e135756@ie.u-ryukyu.ac.jp> parents: 95 diff changeset	587 }
7d135dc70f03 LLVM 3.9 Miyagi Mitsuki <e135756@ie.u-ryukyu.ac.jp> parents: 95 diff changeset	588
77 54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	589 std::string
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	590 BlockFrequencyInfoImplBase::getBlockName(const BlockNode &Node) const {
121 803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	591 return {};
77 54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	592 }
120 1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	593
77 54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	594 std::string
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	595 BlockFrequencyInfoImplBase::getLoopName(const LoopData &Loop) const {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	596 return getBlockName(Loop.getHeader()) + (Loop.isIrreducible() ? "*" : "");
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	597 }
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	598
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	599 raw_ostream &
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	600 BlockFrequencyInfoImplBase::printBlockFreq(raw_ostream &OS,
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	601 const BlockNode &Node) const {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	602 return OS << getFloatingBlockFreq(Node);
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	603 }
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	604
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	605 raw_ostream &
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	606 BlockFrequencyInfoImplBase::printBlockFreq(raw_ostream &OS,
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	607 const BlockFrequency &Freq) const {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	608 Scaled64 Block(Freq.getFrequency(), 0);
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	609 Scaled64 Entry(getEntryFreq(), 0);
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	610
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	611 return OS << Block / Entry;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	612 }
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	613
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	614 void IrreducibleGraph::addNodesInLoop(const BFIBase::LoopData &OuterLoop) {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	615 Start = OuterLoop.getHeader();
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	616 Nodes.reserve(OuterLoop.Nodes.size());
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	617 for (auto N : OuterLoop.Nodes)
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	618 addNode(N);
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	619 indexNodes();
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	620 }
120 1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	621
77 54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	622 void IrreducibleGraph::addNodesInFunction() {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	623 Start = 0;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	624 for (uint32_t Index = 0; Index < BFI.Working.size(); ++Index)
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	625 if (!BFI.Working[Index].isPackaged())
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	626 addNode(Index);
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	627 indexNodes();
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	628 }
120 1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	629
77 54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	630 void IrreducibleGraph::indexNodes() {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	631 for (auto &I : Nodes)
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	632 Lookup[I.Node.Index] = &I;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	633 }
120 1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	634
77 54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	635 void IrreducibleGraph::addEdge(IrrNode &Irr, const BlockNode &Succ,
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	636 const BFIBase::LoopData *OuterLoop) {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	637 if (OuterLoop && OuterLoop->isHeader(Succ))
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	638 return;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	639 auto L = Lookup.find(Succ.Index);
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	640 if (L == Lookup.end())
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	641 return;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	642 IrrNode &SuccIrr = *L->second;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	643 Irr.Edges.push_back(&SuccIrr);
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	644 SuccIrr.Edges.push_front(&Irr);
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	645 ++SuccIrr.NumIn;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	646 }
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	647
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	648 namespace llvm {
121 803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	649
77 54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	650 template <> struct GraphTraits<IrreducibleGraph> {
121 803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	651 using GraphT = bfi_detail::IrreducibleGraph;
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	652 using NodeRef = const GraphT::IrrNode *;
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	653 using ChildIteratorType = GraphT::IrrNode::iterator;
77 54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	654
120 1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	655 static NodeRef getEntryNode(const GraphT &G) { return G.StartIrr; }
1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	656 static ChildIteratorType child_begin(NodeRef N) { return N->succ_begin(); }
1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	657 static ChildIteratorType child_end(NodeRef N) { return N->succ_end(); }
77 54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	658 };
121 803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	659
120 1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	660 } // end namespace llvm
77 54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	661
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	662 /// \brief Find extra irreducible headers.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	663 ///
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	664 /// Find entry blocks and other blocks with backedges, which exist when \c G
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	665 /// contains irreducible sub-SCCs.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	666 static void findIrreducibleHeaders(
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	667 const BlockFrequencyInfoImplBase &BFI,
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	668 const IrreducibleGraph &G,
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	669 const std::vector<const IrreducibleGraph::IrrNode *> &SCC,
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	670 LoopData::NodeList &Headers, LoopData::NodeList &Others) {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	671 // Map from nodes in the SCC to whether it's an entry block.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	672 SmallDenseMap<const IrreducibleGraph::IrrNode *, bool, 8> InSCC;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	673
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	674 // InSCC also acts the set of nodes in the graph. Seed it.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	675 for (const auto *I : SCC)
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	676 InSCC[I] = false;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	677
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	678 for (auto I = InSCC.begin(), E = InSCC.end(); I != E; ++I) {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	679 auto &Irr = *I->first;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	680 for (const auto *P : make_range(Irr.pred_begin(), Irr.pred_end())) {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	681 if (InSCC.count(P))
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	682 continue;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	683
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	684 // This is an entry block.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	685 I->second = true;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	686 Headers.push_back(Irr.Node);
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	687 DEBUG(dbgs() << " => entry = " << BFI.getBlockName(Irr.Node) << "\n");
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	688 break;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	689 }
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	690 }
83 60c9769439b8 LLVM 3.7 Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp> parents: 77 diff changeset	691 assert(Headers.size() >= 2 &&
60c9769439b8 LLVM 3.7 Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp> parents: 77 diff changeset	692 "Expected irreducible CFG; -loop-info is likely invalid");
77 54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	693 if (Headers.size() == InSCC.size()) {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	694 // Every block is a header.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	695 std::sort(Headers.begin(), Headers.end());
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	696 return;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	697 }
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	698
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	699 // Look for extra headers from irreducible sub-SCCs.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	700 for (const auto &I : InSCC) {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	701 // Entry blocks are already headers.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	702 if (I.second)
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	703 continue;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	704
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	705 auto &Irr = *I.first;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	706 for (const auto *P : make_range(Irr.pred_begin(), Irr.pred_end())) {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	707 // Skip forward edges.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	708 if (P->Node < Irr.Node)
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	709 continue;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	710
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	711 // Skip predecessors from entry blocks. These can have inverted
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	712 // ordering.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	713 if (InSCC.lookup(P))
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	714 continue;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	715
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	716 // Store the extra header.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	717 Headers.push_back(Irr.Node);
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	718 DEBUG(dbgs() << " => extra = " << BFI.getBlockName(Irr.Node) << "\n");
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	719 break;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	720 }
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	721 if (Headers.back() == Irr.Node)
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	722 // Added this as a header.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	723 continue;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	724
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	725 // This is not a header.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	726 Others.push_back(Irr.Node);
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	727 DEBUG(dbgs() << " => other = " << BFI.getBlockName(Irr.Node) << "\n");
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	728 }
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	729 std::sort(Headers.begin(), Headers.end());
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	730 std::sort(Others.begin(), Others.end());
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	731 }
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	732
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	733 static void createIrreducibleLoop(
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	734 BlockFrequencyInfoImplBase &BFI, const IrreducibleGraph &G,
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	735 LoopData *OuterLoop, std::list<LoopData>::iterator Insert,
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	736 const std::vector<const IrreducibleGraph::IrrNode *> &SCC) {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	737 // Translate the SCC into RPO.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	738 DEBUG(dbgs() << " - found-scc\n");
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	739
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	740 LoopData::NodeList Headers;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	741 LoopData::NodeList Others;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	742 findIrreducibleHeaders(BFI, G, SCC, Headers, Others);
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	743
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	744 auto Loop = BFI.Loops.emplace(Insert, OuterLoop, Headers.begin(),
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	745 Headers.end(), Others.begin(), Others.end());
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	746
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	747 // Update loop hierarchy.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	748 for (const auto &N : Loop->Nodes)
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	749 if (BFI.Working[N.Index].isLoopHeader())
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	750 BFI.Working[N.Index].Loop->Parent = &*Loop;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	751 else
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	752 BFI.Working[N.Index].Loop = &*Loop;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	753 }
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	754
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	755 iterator_range<std::list<LoopData>::iterator>
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	756 BlockFrequencyInfoImplBase::analyzeIrreducible(
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	757 const IrreducibleGraph &G, LoopData *OuterLoop,
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	758 std::list<LoopData>::iterator Insert) {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	759 assert((OuterLoop == nullptr) == (Insert == Loops.begin()));
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	760 auto Prev = OuterLoop ? std::prev(Insert) : Loops.end();
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	761
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	762 for (auto I = scc_begin(G); !I.isAtEnd(); ++I) {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	763 if (I->size() < 2)
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	764 continue;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	765
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	766 // Translate the SCC into RPO.
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	767 createIrreducibleLoop(this, G, OuterLoop, Insert, I);
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	768 }
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	769
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	770 if (OuterLoop)
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	771 return make_range(std::next(Prev), Insert);
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	772 return make_range(Loops.begin(), Insert);
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	773 }
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	774
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	775 void
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	776 BlockFrequencyInfoImplBase::updateLoopWithIrreducible(LoopData &OuterLoop) {
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	777 OuterLoop.Exits.clear();
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	778 for (auto &Mass : OuterLoop.BackedgeMass)
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	779 Mass = BlockMass::getEmpty();
77 54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	780 auto O = OuterLoop.Nodes.begin() + 1;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	781 for (auto I = O, E = OuterLoop.Nodes.end(); I != E; ++I)
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	782 if (!Working[I->Index].isPackaged())
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	783 O++ = I;
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	784 OuterLoop.Nodes.erase(O, OuterLoop.Nodes.end());
54457678186b LLVM 3.6 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	785 }
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	786
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	787 void BlockFrequencyInfoImplBase::adjustLoopHeaderMass(LoopData &Loop) {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	788 assert(Loop.isIrreducible() && "this only makes sense on irreducible loops");
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	789
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	790 // Since the loop has more than one header block, the mass flowing back into
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	791 // each header will be different. Adjust the mass in each header loop to
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	792 // reflect the masses flowing through back edges.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	793 //
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	794 // To do this, we distribute the initial mass using the backedge masses
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	795 // as weights for the distribution.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	796 BlockMass LoopMass = BlockMass::getFull();
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	797 Distribution Dist;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	798
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	799 DEBUG(dbgs() << "adjust-loop-header-mass:\n");
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	800 for (uint32_t H = 0; H < Loop.NumHeaders; ++H) {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	801 auto &HeaderNode = Loop.Nodes[H];
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	802 auto &BackedgeMass = Loop.BackedgeMass[Loop.getHeaderIndex(HeaderNode)];
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	803 DEBUG(dbgs() << " - Add back edge mass for node "
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	804 << getBlockName(HeaderNode) << ": " << BackedgeMass << "\n");
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	805 if (BackedgeMass.getMass() > 0)
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	806 Dist.addLocal(HeaderNode, BackedgeMass.getMass());
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	807 else
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	808 DEBUG(dbgs() << " Nothing added. Back edge mass is zero\n");
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	809 }
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	810
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	811 DitheringDistributer D(Dist, LoopMass);
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	812
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	813 DEBUG(dbgs() << " Distribute loop mass " << LoopMass
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	814 << " to headers using above weights\n");
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	815 for (const Weight &W : Dist.Weights) {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	816 BlockMass Taken = D.takeMass(W.Amount);
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	817 assert(W.Type == Weight::Local && "all weights should be local");
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	818 Working[W.TargetNode.Index].getMass() = Taken;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	819 DEBUG(debugAssign(*this, D, W.TargetNode, Taken, nullptr));
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	820 }
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: 83 diff changeset	821 }

Mercurial > hg > Members > tobaru > cbc > CbC_llvm

annotate lib/Analysis/BlockFrequencyInfoImpl.cpp @ 128:c347d3398279 default tip