CbC/CbC_llvm: lib/CodeGen/InterleavedAccessPass.cpp annotate

annotate lib/CodeGen/InterleavedAccessPass.cpp @ 134:3a76565eade5 LLVM5.0.1

update 5.0.1

author	mir3636
date	Sat, 17 Feb 2018 09:57:20 +0900
parents	803732b1fca8
children	c2174574ed3a

rev	line source
121 803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	1 //===- InterleavedAccessPass.cpp ------------------------------------------===//
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	2 //
120 1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	3 // The LLVM Compiler Infrastructure
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	4 //
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	5 // This file is distributed under the University of Illinois Open Source
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	6 // License. See LICENSE.TXT for details.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	7 //
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	8 //===----------------------------------------------------------------------===//
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	9 //
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	10 // This file implements the Interleaved Access pass, which identifies
120 1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	11 // interleaved memory accesses and transforms them into target specific
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	12 // intrinsics.
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	13 //
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	14 // An interleaved load reads data from memory into several vectors, with
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	15 // DE-interleaving the data on a factor. An interleaved store writes several
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	16 // vectors to memory with RE-interleaving the data on a factor.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	17 //
120 1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	18 // As interleaved accesses are difficult to identified in CodeGen (mainly
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	19 // because the VECTOR_SHUFFLE DAG node is quite different from the shufflevector
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	20 // IR), we identify and transform them to intrinsics in this pass so the
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	21 // intrinsics can be easily matched into target specific instructions later in
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	22 // CodeGen.
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	23 //
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	24 // E.g. An interleaved load (Factor = 2):
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	25 // %wide.vec = load <8 x i32>, <8 x i32>* %ptr
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	26 // %v0 = shuffle <8 x i32> %wide.vec, <8 x i32> undef, <0, 2, 4, 6>
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	27 // %v1 = shuffle <8 x i32> %wide.vec, <8 x i32> undef, <1, 3, 5, 7>
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	28 //
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	29 // It could be transformed into a ld2 intrinsic in AArch64 backend or a vld2
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	30 // intrinsic in ARM backend.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	31 //
120 1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	32 // In X86, this can be further optimized into a set of target
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	33 // specific loads followed by an optimized sequence of shuffles.
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	34 //
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	35 // E.g. An interleaved store (Factor = 3):
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	36 // %i.vec = shuffle <8 x i32> %v0, <8 x i32> %v1,
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	37 // <0, 4, 8, 1, 5, 9, 2, 6, 10, 3, 7, 11>
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	38 // store <12 x i32> %i.vec, <12 x i32>* %ptr
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	39 //
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	40 // It could be transformed into a st3 intrinsic in AArch64 backend or a vst3
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	41 // intrinsic in ARM backend.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	42 //
120 1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	43 // Similarly, a set of interleaved stores can be transformed into an optimized
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	44 // sequence of shuffles followed by a set of target specific stores for X86.
121 803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	45 //
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	46 //===----------------------------------------------------------------------===//
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	47
121 803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	48 #include "llvm/ADT/ArrayRef.h"
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	49 #include "llvm/ADT/DenseMap.h"
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	50 #include "llvm/ADT/SmallVector.h"
134 3a76565eade5 update 5.0.1 mir3636 parents: 121 diff changeset	51 #include "llvm/CodeGen/TargetLowering.h"
121 803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	52 #include "llvm/CodeGen/TargetPassConfig.h"
134 3a76565eade5 update 5.0.1 mir3636 parents: 121 diff changeset	53 #include "llvm/CodeGen/TargetSubtargetInfo.h"
121 803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	54 #include "llvm/IR/Constants.h"
120 1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	55 #include "llvm/IR/Dominators.h"
121 803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	56 #include "llvm/IR/Function.h"
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	57 #include "llvm/IR/IRBuilder.h"
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	58 #include "llvm/IR/InstIterator.h"
121 803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	59 #include "llvm/IR/Instruction.h"
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	60 #include "llvm/IR/Instructions.h"
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	61 #include "llvm/IR/Type.h"
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	62 #include "llvm/Pass.h"
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	63 #include "llvm/Support/Casting.h"
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	64 #include "llvm/Support/CommandLine.h"
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	65 #include "llvm/Support/Debug.h"
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	66 #include "llvm/Support/MathExtras.h"
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	67 #include "llvm/Support/raw_ostream.h"
121 803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	68 #include "llvm/Target/TargetMachine.h"
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	69 #include <cassert>
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	70 #include <utility>
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	71
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	72 using namespace llvm;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	73
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	74 #define DEBUG_TYPE "interleaved-access"
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	75
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	76 static cl::opt<bool> LowerInterleavedAccesses(
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	77 "lower-interleaved-accesses",
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	78 cl::desc("Enable lowering interleaved accesses to intrinsics"),
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	79 cl::init(true), cl::Hidden);
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	80
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	81 namespace {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	82
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	83 class InterleavedAccess : public FunctionPass {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	84 public:
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	85 static char ID;
121 803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	86
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	87 InterleavedAccess() : FunctionPass(ID) {
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	88 initializeInterleavedAccessPass(*PassRegistry::getPassRegistry());
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	89 }
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	90
120 1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	91 StringRef getPassName() const override { return "Interleaved Access Pass"; }
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	92
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	93 bool runOnFunction(Function &F) override;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	94
120 1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	95 void getAnalysisUsage(AnalysisUsage &AU) const override {
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	96 AU.addRequired<DominatorTreeWrapperPass>();
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	97 AU.addPreserved<DominatorTreeWrapperPass>();
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	98 }
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	99
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	100 private:
121 803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	101 DominatorTree *DT = nullptr;
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	102 const TargetLowering *TLI = nullptr;
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	103
120 1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	104 /// The maximum supported interleave factor.
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	105 unsigned MaxFactor;
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	106
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	107 /// \brief Transform an interleaved load into target specific intrinsics.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	108 bool lowerInterleavedLoad(LoadInst *LI,
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	109 SmallVector<Instruction *, 32> &DeadInsts);
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	110
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	111 /// \brief Transform an interleaved store into target specific intrinsics.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	112 bool lowerInterleavedStore(StoreInst *SI,
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	113 SmallVector<Instruction *, 32> &DeadInsts);
120 1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	114
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	115 /// \brief Returns true if the uses of an interleaved load by the
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	116 /// extractelement instructions in \p Extracts can be replaced by uses of the
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	117 /// shufflevector instructions in \p Shuffles instead. If so, the necessary
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	118 /// replacements are also performed.
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	119 bool tryReplaceExtracts(ArrayRef<ExtractElementInst *> Extracts,
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	120 ArrayRef<ShuffleVectorInst *> Shuffles);
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	121 };
121 803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	122
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	123 } // end anonymous namespace.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	124
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	125 char InterleavedAccess::ID = 0;
121 803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	126
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	127 INITIALIZE_PASS_BEGIN(InterleavedAccess, DEBUG_TYPE,
120 1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	128 "Lower interleaved memory accesses to target specific intrinsics", false,
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	129 false)
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	130 INITIALIZE_PASS_DEPENDENCY(DominatorTreeWrapperPass)
121 803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	131 INITIALIZE_PASS_END(InterleavedAccess, DEBUG_TYPE,
120 1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	132 "Lower interleaved memory accesses to target specific intrinsics", false,
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	133 false)
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	134
121 803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	135 FunctionPass *llvm::createInterleavedAccessPass() {
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	136 return new InterleavedAccess();
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	137 }
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	138
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	139 /// \brief Check if the mask is a DE-interleave mask of the given factor
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	140 /// \p Factor like:
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	141 /// <Index, Index+Factor, ..., Index+(NumElts-1)*Factor>
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	142 static bool isDeInterleaveMaskOfFactor(ArrayRef<int> Mask, unsigned Factor,
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	143 unsigned &Index) {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	144 // Check all potential start indices from 0 to (Factor - 1).
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	145 for (Index = 0; Index < Factor; Index++) {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	146 unsigned i = 0;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	147
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	148 // Check that elements are in ascending order by Factor. Ignore undef
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	149 // elements.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	150 for (; i < Mask.size(); i++)
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	151 if (Mask[i] >= 0 && static_cast<unsigned>(Mask[i]) != Index + i * Factor)
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	152 break;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	153
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	154 if (i == Mask.size())
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	155 return true;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	156 }
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	157
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	158 return false;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	159 }
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	160
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	161 /// \brief Check if the mask is a DE-interleave mask for an interleaved load.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	162 ///
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	163 /// E.g. DE-interleave masks (Factor = 2) could be:
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	164 /// <0, 2, 4, 6> (mask of index 0 to extract even elements)
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	165 /// <1, 3, 5, 7> (mask of index 1 to extract odd elements)
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	166 static bool isDeInterleaveMask(ArrayRef<int> Mask, unsigned &Factor,
120 1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	167 unsigned &Index, unsigned MaxFactor) {
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	168 if (Mask.size() < 2)
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	169 return false;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	170
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	171 // Check potential Factors.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	172 for (Factor = 2; Factor <= MaxFactor; Factor++)
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	173 if (isDeInterleaveMaskOfFactor(Mask, Factor, Index))
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	174 return true;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	175
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	176 return false;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	177 }
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	178
121 803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	179 /// \brief Check if the mask can be used in an interleaved store.
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	180 //
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	181 /// It checks for a more general pattern than the RE-interleave mask.
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	182 /// I.e. <x, y, ... z, x+1, y+1, ...z+1, x+2, y+2, ...z+2, ...>
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	183 /// E.g. For a Factor of 2 (LaneLen=4): <4, 32, 5, 33, 6, 34, 7, 35>
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	184 /// E.g. For a Factor of 3 (LaneLen=4): <4, 32, 16, 5, 33, 17, 6, 34, 18, 7, 35, 19>
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	185 /// E.g. For a Factor of 4 (LaneLen=2): <8, 2, 12, 4, 9, 3, 13, 5>
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	186 ///
121 803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	187 /// The particular case of an RE-interleave mask is:
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	188 /// I.e. <0, LaneLen, ... , LaneLen*(Factor - 1), 1, LaneLen + 1, ...>
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	189 /// E.g. For a Factor of 2 (LaneLen=4): <0, 4, 1, 5, 2, 6, 3, 7>
120 1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	190 static bool isReInterleaveMask(ArrayRef<int> Mask, unsigned &Factor,
121 803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	191 unsigned MaxFactor, unsigned OpNumElts) {
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	192 unsigned NumElts = Mask.size();
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	193 if (NumElts < 4)
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	194 return false;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	195
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	196 // Check potential Factors.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	197 for (Factor = 2; Factor <= MaxFactor; Factor++) {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	198 if (NumElts % Factor)
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	199 continue;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	200
121 803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	201 unsigned LaneLen = NumElts / Factor;
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	202 if (!isPowerOf2_32(LaneLen))
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	203 continue;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	204
121 803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	205 // Check whether each element matches the general interleaved rule.
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	206 // Ignore undef elements, as long as the defined elements match the rule.
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	207 // Outer loop processes all factors (x, y, z in the above example)
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	208 unsigned I = 0, J;
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	209 for (; I < Factor; I++) {
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	210 unsigned SavedLaneValue;
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	211 unsigned SavedNoUndefs = 0;
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	212
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	213 // Inner loop processes consecutive accesses (x, x+1... in the example)
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	214 for (J = 0; J < LaneLen - 1; J++) {
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	215 // Lane computes x's position in the Mask
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	216 unsigned Lane = J * Factor + I;
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	217 unsigned NextLane = Lane + Factor;
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	218 int LaneValue = Mask[Lane];
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	219 int NextLaneValue = Mask[NextLane];
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	220
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	221 // If both are defined, values must be sequential
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	222 if (LaneValue >= 0 && NextLaneValue >= 0 &&
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	223 LaneValue + 1 != NextLaneValue)
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	224 break;
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	225
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	226 // If the next value is undef, save the current one as reference
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	227 if (LaneValue >= 0 && NextLaneValue < 0) {
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	228 SavedLaneValue = LaneValue;
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	229 SavedNoUndefs = 1;
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	230 }
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	231
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	232 // Undefs are allowed, but defined elements must still be consecutive:
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	233 // i.e.: x,..., undef,..., x + 2,..., undef,..., undef,..., x + 5, ....
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	234 // Verify this by storing the last non-undef followed by an undef
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	235 // Check that following non-undef masks are incremented with the
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	236 // corresponding distance.
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	237 if (SavedNoUndefs > 0 && LaneValue < 0) {
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	238 SavedNoUndefs++;
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	239 if (NextLaneValue >= 0 &&
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	240 SavedLaneValue + SavedNoUndefs != (unsigned)NextLaneValue)
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	241 break;
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	242 }
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	243 }
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	244
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	245 if (J < LaneLen - 1)
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	246 break;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	247
121 803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	248 int StartMask = 0;
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	249 if (Mask[I] >= 0) {
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	250 // Check that the start of the I range (J=0) is greater than 0
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	251 StartMask = Mask[I];
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	252 } else if (Mask[(LaneLen - 1) * Factor + I] >= 0) {
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	253 // StartMask defined by the last value in lane
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	254 StartMask = Mask[(LaneLen - 1) * Factor + I] - J;
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	255 } else if (SavedNoUndefs > 0) {
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	256 // StartMask defined by some non-zero value in the j loop
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	257 StartMask = SavedLaneValue - (LaneLen - 1 - SavedNoUndefs);
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	258 }
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	259 // else StartMask remains set to 0, i.e. all elements are undefs
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	260
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	261 if (StartMask < 0)
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	262 break;
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	263 // We must stay within the vectors; This case can happen with undefs.
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	264 if (StartMask + LaneLen > OpNumElts*2)
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	265 break;
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	266 }
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	267
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	268 // Found an interleaved mask of current factor.
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	269 if (I == Factor)
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	270 return true;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	271 }
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	272
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	273 return false;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	274 }
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	275
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	276 bool InterleavedAccess::lowerInterleavedLoad(
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	277 LoadInst LI, SmallVector<Instruction , 32> &DeadInsts) {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	278 if (!LI->isSimple())
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	279 return false;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	280
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	281 SmallVector<ShuffleVectorInst *, 4> Shuffles;
120 1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	282 SmallVector<ExtractElementInst *, 4> Extracts;
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	283
120 1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	284 // Check if all users of this load are shufflevectors. If we encounter any
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	285 // users that are extractelement instructions, we save them to later check if
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	286 // they can be modifed to extract from one of the shufflevectors instead of
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	287 // the load.
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	288 for (auto UI = LI->user_begin(), E = LI->user_end(); UI != E; UI++) {
120 1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	289 auto Extract = dyn_cast<ExtractElementInst>(UI);
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	290 if (Extract && isa<ConstantInt>(Extract->getIndexOperand())) {
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	291 Extracts.push_back(Extract);
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	292 continue;
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	293 }
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	294 ShuffleVectorInst SVI = dyn_cast<ShuffleVectorInst>(UI);
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	295 if (!SVI \|\| !isa<UndefValue>(SVI->getOperand(1)))
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	296 return false;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	297
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	298 Shuffles.push_back(SVI);
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	299 }
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	300
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	301 if (Shuffles.empty())
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	302 return false;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	303
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	304 unsigned Factor, Index;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	305
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	306 // Check if the first shufflevector is DE-interleave shuffle.
120 1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	307 if (!isDeInterleaveMask(Shuffles[0]->getShuffleMask(), Factor, Index,
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	308 MaxFactor))
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	309 return false;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	310
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	311 // Holds the corresponding index for each DE-interleave shuffle.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	312 SmallVector<unsigned, 4> Indices;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	313 Indices.push_back(Index);
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	314
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	315 Type *VecTy = Shuffles[0]->getType();
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	316
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	317 // Check if other shufflevectors are also DE-interleaved of the same type
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	318 // and factor as the first shufflevector.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	319 for (unsigned i = 1; i < Shuffles.size(); i++) {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	320 if (Shuffles[i]->getType() != VecTy)
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	321 return false;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	322
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	323 if (!isDeInterleaveMaskOfFactor(Shuffles[i]->getShuffleMask(), Factor,
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	324 Index))
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	325 return false;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	326
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	327 Indices.push_back(Index);
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	328 }
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	329
120 1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	330 // Try and modify users of the load that are extractelement instructions to
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	331 // use the shufflevector instructions instead of the load.
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	332 if (!tryReplaceExtracts(Extracts, Shuffles))
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	333 return false;
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	334
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	335 DEBUG(dbgs() << "IA: Found an interleaved load: " << *LI << "\n");
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	336
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	337 // Try to create target specific intrinsics to replace the load and shuffles.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	338 if (!TLI->lowerInterleavedLoad(LI, Shuffles, Indices, Factor))
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	339 return false;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	340
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	341 for (auto SVI : Shuffles)
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	342 DeadInsts.push_back(SVI);
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	343
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	344 DeadInsts.push_back(LI);
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	345 return true;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	346 }
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	347
120 1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	348 bool InterleavedAccess::tryReplaceExtracts(
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	349 ArrayRef<ExtractElementInst *> Extracts,
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	350 ArrayRef<ShuffleVectorInst *> Shuffles) {
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	351 // If there aren't any extractelement instructions to modify, there's nothing
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	352 // to do.
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	353 if (Extracts.empty())
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	354 return true;
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	355
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	356 // Maps extractelement instructions to vector-index pairs. The extractlement
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	357 // instructions will be modified to use the new vector and index operands.
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	358 DenseMap<ExtractElementInst , std::pair<Value , int>> ReplacementMap;
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	359
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	360 for (auto *Extract : Extracts) {
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	361 // The vector index that is extracted.
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	362 auto *IndexOperand = cast<ConstantInt>(Extract->getIndexOperand());
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	363 auto Index = IndexOperand->getSExtValue();
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	364
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	365 // Look for a suitable shufflevector instruction. The goal is to modify the
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	366 // extractelement instruction (which uses an interleaved load) to use one
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	367 // of the shufflevector instructions instead of the load.
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	368 for (auto *Shuffle : Shuffles) {
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	369 // If the shufflevector instruction doesn't dominate the extract, we
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	370 // can't create a use of it.
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	371 if (!DT->dominates(Shuffle, Extract))
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	372 continue;
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	373
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	374 // Inspect the indices of the shufflevector instruction. If the shuffle
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	375 // selects the same index that is extracted, we can modify the
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	376 // extractelement instruction.
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	377 SmallVector<int, 4> Indices;
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	378 Shuffle->getShuffleMask(Indices);
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	379 for (unsigned I = 0; I < Indices.size(); ++I)
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	380 if (Indices[I] == Index) {
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	381 assert(Extract->getOperand(0) == Shuffle->getOperand(0) &&
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	382 "Vector operations do not match");
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	383 ReplacementMap[Extract] = std::make_pair(Shuffle, I);
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	384 break;
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	385 }
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	386
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	387 // If we found a suitable shufflevector instruction, stop looking.
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	388 if (ReplacementMap.count(Extract))
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	389 break;
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	390 }
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	391
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	392 // If we did not find a suitable shufflevector instruction, the
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	393 // extractelement instruction cannot be modified, so we must give up.
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	394 if (!ReplacementMap.count(Extract))
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	395 return false;
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	396 }
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	397
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	398 // Finally, perform the replacements.
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	399 IRBuilder<> Builder(Extracts[0]->getContext());
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	400 for (auto &Replacement : ReplacementMap) {
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	401 auto *Extract = Replacement.first;
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	402 auto *Vector = Replacement.second.first;
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	403 auto Index = Replacement.second.second;
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	404 Builder.SetInsertPoint(Extract);
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	405 Extract->replaceAllUsesWith(Builder.CreateExtractElement(Vector, Index));
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	406 Extract->eraseFromParent();
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	407 }
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	408
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	409 return true;
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	410 }
1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	411
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	412 bool InterleavedAccess::lowerInterleavedStore(
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	413 StoreInst SI, SmallVector<Instruction , 32> &DeadInsts) {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	414 if (!SI->isSimple())
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	415 return false;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	416
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	417 ShuffleVectorInst *SVI = dyn_cast<ShuffleVectorInst>(SI->getValueOperand());
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	418 if (!SVI \|\| !SVI->hasOneUse())
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	419 return false;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	420
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	421 // Check if the shufflevector is RE-interleave shuffle.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	422 unsigned Factor;
121 803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	423 unsigned OpNumElts = SVI->getOperand(0)->getType()->getVectorNumElements();
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	424 if (!isReInterleaveMask(SVI->getShuffleMask(), Factor, MaxFactor, OpNumElts))
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	425 return false;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	426
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	427 DEBUG(dbgs() << "IA: Found an interleaved store: " << *SI << "\n");
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	428
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	429 // Try to create target specific intrinsics to replace the store and shuffle.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	430 if (!TLI->lowerInterleavedStore(SI, SVI, Factor))
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	431 return false;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	432
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	433 // Already have a new target specific interleaved store. Erase the old store.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	434 DeadInsts.push_back(SI);
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	435 DeadInsts.push_back(SVI);
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	436 return true;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	437 }
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	438
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	439 bool InterleavedAccess::runOnFunction(Function &F) {
121 803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	440 auto *TPC = getAnalysisIfAvailable<TargetPassConfig>();
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	441 if (!TPC \|\| !LowerInterleavedAccesses)
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	442 return false;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	443
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	444 DEBUG(dbgs() << "*** " << getPassName() << ": " << F.getName() << "\n");
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	445
120 1172e4bd9c6f update 4.0.0 mir3636 parents: 95 diff changeset	446 DT = &getAnalysis<DominatorTreeWrapperPass>().getDomTree();
121 803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	447 auto &TM = TPC->getTM<TargetMachine>();
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	448 TLI = TM.getSubtargetImpl(F)->getTargetLowering();
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	449 MaxFactor = TLI->getMaxSupportedInterleaveFactor();
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	450
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	451 // Holds dead instructions that will be erased later.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	452 SmallVector<Instruction *, 32> DeadInsts;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	453 bool Changed = false;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	454
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	455 for (auto &I : instructions(F)) {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	456 if (LoadInst *LI = dyn_cast<LoadInst>(&I))
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	457 Changed \|= lowerInterleavedLoad(LI, DeadInsts);
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	458
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	459 if (StoreInst *SI = dyn_cast<StoreInst>(&I))
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	460 Changed \|= lowerInterleavedStore(SI, DeadInsts);
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	461 }
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	462
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	463 for (auto I : DeadInsts)
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	464 I->eraseFromParent();
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	465
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	466 return Changed;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	467 }

Mercurial > hg > CbC > CbC_llvm

annotate lib/CodeGen/InterleavedAccessPass.cpp @ 134:3a76565eade5 LLVM5.0.1