CbC/CbC_llvm: lib/Analysis/CallGraphSCCPass.cpp annotate

annotate lib/Analysis/CallGraphSCCPass.cpp @ 121:803732b1fca8

LLVM 5.0

author	kono
date	Fri, 27 Oct 2017 17:07:41 +0900
parents	1172e4bd9c6f
children	c2174574ed3a

rev	line source
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	1 //===- CallGraphSCCPass.cpp - Pass that operates BU on call graph ---------===//
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	2 //
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	3 // The LLVM Compiler Infrastructure
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 CallGraphSCCPass class, which is used for passes
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	11 // which are implemented as bottom-up traversals on the call graph. Because
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	12 // there may be cycles in the call graph, passes of this type operate on the
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	13 // call-graph in SCC order: that is, they process function bottom-up, except for
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	14 // recursive functions, which they process all at once.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	15 //
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	16 //===----------------------------------------------------------------------===//
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	17
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	18 #include "llvm/Analysis/CallGraphSCCPass.h"
121 803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	19 #include "llvm/ADT/DenseMap.h"
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	20 #include "llvm/ADT/SCCIterator.h"
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	21 #include "llvm/ADT/Statistic.h"
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	22 #include "llvm/Analysis/CallGraph.h"
121 803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	23 #include "llvm/IR/CallSite.h"
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	24 #include "llvm/IR/Function.h"
121 803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	25 #include "llvm/IR/Intrinsics.h"
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	26 #include "llvm/IR/LLVMContext.h"
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	27 #include "llvm/IR/LegacyPassManagers.h"
121 803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	28 #include "llvm/IR/Module.h"
120 1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	29 #include "llvm/IR/OptBisect.h"
121 803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	30 #include "llvm/Pass.h"
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	31 #include "llvm/Support/CommandLine.h"
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	32 #include "llvm/Support/Debug.h"
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	33 #include "llvm/Support/Timer.h"
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	34 #include "llvm/Support/raw_ostream.h"
121 803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	35 #include <cassert>
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	36 #include <string>
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	37 #include <utility>
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	38 #include <vector>
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	39
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	40 using namespace llvm;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	41
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	42 #define DEBUG_TYPE "cgscc-passmgr"
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	43
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	44 static cl::opt<unsigned>
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	45 MaxIterations("max-cg-scc-iterations", cl::ReallyHidden, cl::init(4));
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 STATISTIC(MaxSCCIterations, "Maximum CGSCCPassMgr iterations on one SCC");
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	48
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	49 //===----------------------------------------------------------------------===//
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	50 // CGPassManager
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	51 //
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	52 /// CGPassManager manages FPPassManagers and CallGraphSCCPasses.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	53
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	54 namespace {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	55
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	56 class CGPassManager : public ModulePass, public PMDataManager {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	57 public:
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	58 static char ID;
121 803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	59
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	60 explicit CGPassManager() : ModulePass(ID), PMDataManager() {}
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	61
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	62 /// Execute all of the passes scheduled for execution. Keep track of
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	63 /// whether any of the passes modifies the module, and if so, return true.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	64 bool runOnModule(Module &M) override;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	65
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	66 using ModulePass::doInitialization;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	67 using ModulePass::doFinalization;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	68
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	69 bool doInitialization(CallGraph &CG);
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	70 bool doFinalization(CallGraph &CG);
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 /// Pass Manager itself does not invalidate any analysis info.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	73 void getAnalysisUsage(AnalysisUsage &Info) const override {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	74 // CGPassManager walks SCC and it needs CallGraph.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	75 Info.addRequired<CallGraphWrapperPass>();
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	76 Info.setPreservesAll();
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	77 }
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	78
120 1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	79 StringRef getPassName() const override { return "CallGraph Pass Manager"; }
95 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 PMDataManager *getAsPMDataManager() override { return this; }
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	82 Pass *getAsPass() override { return this; }
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	83
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	84 // Print passes managed by this manager
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	85 void dumpPassStructure(unsigned Offset) override {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	86 errs().indent(Offset*2) << "Call Graph SCC Pass Manager\n";
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	87 for (unsigned Index = 0; Index < getNumContainedPasses(); ++Index) {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	88 Pass *P = getContainedPass(Index);
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	89 P->dumpPassStructure(Offset + 1);
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	90 dumpLastUses(P, Offset+1);
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	91 }
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
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	94 Pass *getContainedPass(unsigned N) {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	95 assert(N < PassVector.size() && "Pass number out of range!");
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	96 return static_cast<Pass *>(PassVector[N]);
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	97 }
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	98
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	99 PassManagerType getPassManagerType() const override {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	100 return PMT_CallGraphPassManager;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	101 }
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	102
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	103 private:
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	104 bool RunAllPassesOnSCC(CallGraphSCC &CurSCC, CallGraph &CG,
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	105 bool &DevirtualizedCall);
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	106
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	107 bool RunPassOnSCC(Pass *P, CallGraphSCC &CurSCC,
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	108 CallGraph &CG, bool &CallGraphUpToDate,
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	109 bool &DevirtualizedCall);
120 1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	110 bool RefreshCallGraph(const CallGraphSCC &CurSCC, CallGraph &CG,
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	111 bool IsCheckingMode);
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	112 };
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	113
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	114 } // end anonymous namespace.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	115
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	116 char CGPassManager::ID = 0;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	117
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	118 bool CGPassManager::RunPassOnSCC(Pass *P, CallGraphSCC &CurSCC,
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	119 CallGraph &CG, bool &CallGraphUpToDate,
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	120 bool &DevirtualizedCall) {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	121 bool Changed = false;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	122 PMDataManager *PM = P->getAsPMDataManager();
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	123
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	124 if (!PM) {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	125 CallGraphSCCPass CGSP = (CallGraphSCCPass)P;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	126 if (!CallGraphUpToDate) {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	127 DevirtualizedCall \|= RefreshCallGraph(CurSCC, CG, false);
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	128 CallGraphUpToDate = true;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	129 }
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	130
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	131 {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	132 TimeRegion PassTimer(getPassTimer(CGSP));
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	133 Changed = CGSP->runOnSCC(CurSCC);
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	134 }
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	135
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	136 // After the CGSCCPass is done, when assertions are enabled, use
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	137 // RefreshCallGraph to verify that the callgraph was correctly updated.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	138 #ifndef NDEBUG
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	139 if (Changed)
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	140 RefreshCallGraph(CurSCC, CG, true);
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	141 #endif
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	142
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	143 return Changed;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	144 }
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	145
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	146 assert(PM->getPassManagerType() == PMT_FunctionPassManager &&
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	147 "Invalid CGPassManager member");
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	148 FPPassManager FPP = (FPPassManager)P;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	149
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	150 // Run pass P on all functions in the current SCC.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	151 for (CallGraphNode *CGN : CurSCC) {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	152 if (Function *F = CGN->getFunction()) {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	153 dumpPassInfo(P, EXECUTION_MSG, ON_FUNCTION_MSG, F->getName());
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	154 {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	155 TimeRegion PassTimer(getPassTimer(FPP));
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	156 Changed \|= FPP->runOnFunction(*F);
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 F->getContext().yield();
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
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	162 // The function pass(es) modified the IR, they may have clobbered the
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	163 // callgraph.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	164 if (Changed && CallGraphUpToDate) {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	165 DEBUG(dbgs() << "CGSCCPASSMGR: Pass Dirtied SCC: "
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	166 << P->getPassName() << '\n');
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	167 CallGraphUpToDate = false;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	168 }
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	169 return Changed;
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
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	172 /// Scan the functions in the specified CFG and resync the
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	173 /// callgraph with the call sites found in it. This is used after
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	174 /// FunctionPasses have potentially munged the callgraph, and can be used after
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	175 /// CallGraphSCC passes to verify that they correctly updated the callgraph.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	176 ///
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	177 /// This function returns true if it devirtualized an existing function call,
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	178 /// meaning it turned an indirect call into a direct call. This happens when
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	179 /// a function pass like GVN optimizes away stuff feeding the indirect call.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	180 /// This never happens in checking mode.
120 1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	181 bool CGPassManager::RefreshCallGraph(const CallGraphSCC &CurSCC, CallGraph &CG,
1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	182 bool CheckingMode) {
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	183 DenseMap<Value, CallGraphNode> CallSites;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	184
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	185 DEBUG(dbgs() << "CGSCCPASSMGR: Refreshing SCC with " << CurSCC.size()
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	186 << " nodes:\n";
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	187 for (CallGraphNode *CGN : CurSCC)
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	188 CGN->dump();
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	189 );
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	190
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	191 bool MadeChange = false;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	192 bool DevirtualizedCall = false;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	193
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	194 // Scan all functions in the SCC.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	195 unsigned FunctionNo = 0;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	196 for (CallGraphSCC::iterator SCCIdx = CurSCC.begin(), E = CurSCC.end();
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	197 SCCIdx != E; ++SCCIdx, ++FunctionNo) {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	198 CallGraphNode CGN = SCCIdx;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	199 Function *F = CGN->getFunction();
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	200 if (!F \|\| F->isDeclaration()) continue;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	201
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	202 // Walk the function body looking for call sites. Sync up the call sites in
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	203 // CGN with those actually in the function.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	204
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	205 // Keep track of the number of direct and indirect calls that were
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	206 // invalidated and removed.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	207 unsigned NumDirectRemoved = 0, NumIndirectRemoved = 0;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	208
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	209 // Get the set of call sites currently in the function.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	210 for (CallGraphNode::iterator I = CGN->begin(), E = CGN->end(); I != E; ) {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	211 // If this call site is null, then the function pass deleted the call
121 803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	212 // entirely and the WeakTrackingVH nulled it out.
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	213 if (!I->first \|\|
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	214 // If we've already seen this call site, then the FunctionPass RAUW'd
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	215 // one call with another, which resulted in two "uses" in the edge
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	216 // list of the same call.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	217 CallSites.count(I->first) \|\|
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	218
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	219 // If the call edge is not from a call or invoke, or it is a
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	220 // instrinsic call, then the function pass RAUW'd a call with
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	221 // another value. This can happen when constant folding happens
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	222 // of well known functions etc.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	223 !CallSite(I->first) \|\|
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	224 (CallSite(I->first).getCalledFunction() &&
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	225 CallSite(I->first).getCalledFunction()->isIntrinsic() &&
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	226 Intrinsic::isLeaf(
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	227 CallSite(I->first).getCalledFunction()->getIntrinsicID()))) {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	228 assert(!CheckingMode &&
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	229 "CallGraphSCCPass did not update the CallGraph correctly!");
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	230
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	231 // If this was an indirect call site, count it.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	232 if (!I->second->getFunction())
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	233 ++NumIndirectRemoved;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	234 else
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	235 ++NumDirectRemoved;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	236
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	237 // Just remove the edge from the set of callees, keep track of whether
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	238 // I points to the last element of the vector.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	239 bool WasLast = I + 1 == E;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	240 CGN->removeCallEdge(I);
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	241
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	242 // If I pointed to the last element of the vector, we have to bail out:
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	243 // iterator checking rejects comparisons of the resultant pointer with
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	244 // end.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	245 if (WasLast)
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 E = CGN->end();
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	248 continue;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	249 }
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	250
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	251 assert(!CallSites.count(I->first) &&
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	252 "Call site occurs in node multiple times");
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	253
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	254 CallSite CS(I->first);
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	255 if (CS) {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	256 Function *Callee = CS.getCalledFunction();
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	257 // Ignore intrinsics because they're not really function calls.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	258 if (!Callee \|\| !(Callee->isIntrinsic()))
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	259 CallSites.insert(std::make_pair(I->first, I->second));
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	260 }
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	261 ++I;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	262 }
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	263
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	264 // Loop over all of the instructions in the function, getting the callsites.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	265 // Keep track of the number of direct/indirect calls added.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	266 unsigned NumDirectAdded = 0, NumIndirectAdded = 0;
120 1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	267
1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	268 for (BasicBlock &BB : *F)
1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	269 for (Instruction &I : BB) {
1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	270 CallSite CS(&I);
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	271 if (!CS) continue;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	272 Function *Callee = CS.getCalledFunction();
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	273 if (Callee && Callee->isIntrinsic()) continue;
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 // If this call site already existed in the callgraph, just verify it
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	276 // matches up to expectations and remove it from CallSites.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	277 DenseMap<Value, CallGraphNode>::iterator ExistingIt =
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	278 CallSites.find(CS.getInstruction());
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	279 if (ExistingIt != CallSites.end()) {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	280 CallGraphNode *ExistingNode = ExistingIt->second;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	281
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	282 // Remove from CallSites since we have now seen it.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	283 CallSites.erase(ExistingIt);
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	284
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	285 // Verify that the callee is right.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	286 if (ExistingNode->getFunction() == CS.getCalledFunction())
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	287 continue;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	288
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	289 // If we are in checking mode, we are not allowed to actually mutate
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	290 // the callgraph. If this is a case where we can infer that the
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	291 // callgraph is less precise than it could be (e.g. an indirect call
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	292 // site could be turned direct), don't reject it in checking mode, and
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	293 // don't tweak it to be more precise.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	294 if (CheckingMode && CS.getCalledFunction() &&
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	295 ExistingNode->getFunction() == nullptr)
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	296 continue;
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 assert(!CheckingMode &&
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	299 "CallGraphSCCPass did not update the CallGraph correctly!");
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 not, we either went from a direct call to indirect, indirect to
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	302 // direct, or direct to different direct.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	303 CallGraphNode *CalleeNode;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	304 if (Function *Callee = CS.getCalledFunction()) {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	305 CalleeNode = CG.getOrInsertFunction(Callee);
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	306 // Keep track of whether we turned an indirect call into a direct
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	307 // one.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	308 if (!ExistingNode->getFunction()) {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	309 DevirtualizedCall = true;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	310 DEBUG(dbgs() << " CGSCCPASSMGR: Devirtualized call to '"
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	311 << Callee->getName() << "'\n");
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	312 }
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	313 } else {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	314 CalleeNode = CG.getCallsExternalNode();
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	315 }
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 // Update the edge target in CGN.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	318 CGN->replaceCallEdge(CS, CS, CalleeNode);
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	319 MadeChange = true;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	320 continue;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	321 }
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 assert(!CheckingMode &&
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	324 "CallGraphSCCPass did not update the CallGraph correctly!");
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	325
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	326 // If the call site didn't exist in the CGN yet, add it.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	327 CallGraphNode *CalleeNode;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	328 if (Function *Callee = CS.getCalledFunction()) {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	329 CalleeNode = CG.getOrInsertFunction(Callee);
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	330 ++NumDirectAdded;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	331 } else {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	332 CalleeNode = CG.getCallsExternalNode();
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	333 ++NumIndirectAdded;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	334 }
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	335
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	336 CGN->addCalledFunction(CS, CalleeNode);
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	337 MadeChange = true;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	338 }
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	339
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	340 // We scanned the old callgraph node, removing invalidated call sites and
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	341 // then added back newly found call sites. One thing that can happen is
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	342 // that an old indirect call site was deleted and replaced with a new direct
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	343 // call. In this case, we have devirtualized a call, and CGSCCPM would like
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	344 // to iteratively optimize the new code. Unfortunately, we don't really
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	345 // have a great way to detect when this happens. As an approximation, we
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	346 // just look at whether the number of indirect calls is reduced and the
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	347 // number of direct calls is increased. There are tons of ways to fool this
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	348 // (e.g. DCE'ing an indirect call and duplicating an unrelated block with a
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	349 // direct call) but this is close enough.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	350 if (NumIndirectRemoved > NumIndirectAdded &&
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	351 NumDirectRemoved < NumDirectAdded)
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	352 DevirtualizedCall = true;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	353
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	354 // After scanning this function, if we still have entries in callsites, then
121 803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	355 // they are dangling pointers. WeakTrackingVH should save us for this, so
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	356 // abort if
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	357 // this happens.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	358 assert(CallSites.empty() && "Dangling pointers found in call sites map");
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	359
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	360 // Periodically do an explicit clear to remove tombstones when processing
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	361 // large scc's.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	362 if ((FunctionNo & 15) == 15)
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	363 CallSites.clear();
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	364 }
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	365
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	366 DEBUG(if (MadeChange) {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	367 dbgs() << "CGSCCPASSMGR: Refreshed SCC is now:\n";
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	368 for (CallGraphNode *CGN : CurSCC)
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	369 CGN->dump();
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	370 if (DevirtualizedCall)
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	371 dbgs() << "CGSCCPASSMGR: Refresh devirtualized a call!\n";
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	372
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	373 } else {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	374 dbgs() << "CGSCCPASSMGR: SCC Refresh didn't change call graph.\n";
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	375 }
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	376 );
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	377 (void)MadeChange;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	378
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	379 return DevirtualizedCall;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	380 }
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	381
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	382 /// Execute the body of the entire pass manager on the specified SCC.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	383 /// This keeps track of whether a function pass devirtualizes
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	384 /// any calls and returns it in DevirtualizedCall.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	385 bool CGPassManager::RunAllPassesOnSCC(CallGraphSCC &CurSCC, CallGraph &CG,
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	386 bool &DevirtualizedCall) {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	387 bool Changed = false;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	388
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	389 // Keep track of whether the callgraph is known to be up-to-date or not.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	390 // The CGSSC pass manager runs two types of passes:
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	391 // CallGraphSCC Passes and other random function passes. Because other
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	392 // random function passes are not CallGraph aware, they may clobber the
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	393 // call graph by introducing new calls or deleting other ones. This flag
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	394 // is set to false when we run a function pass so that we know to clean up
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	395 // the callgraph when we need to run a CGSCCPass again.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	396 bool CallGraphUpToDate = true;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	397
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	398 // Run all passes on current SCC.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	399 for (unsigned PassNo = 0, e = getNumContainedPasses();
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	400 PassNo != e; ++PassNo) {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	401 Pass *P = getContainedPass(PassNo);
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	402
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	403 // If we're in -debug-pass=Executions mode, construct the SCC node list,
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	404 // otherwise avoid constructing this string as it is expensive.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	405 if (isPassDebuggingExecutionsOrMore()) {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	406 std::string Functions;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	407 #ifndef NDEBUG
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	408 raw_string_ostream OS(Functions);
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	409 for (CallGraphSCC::iterator I = CurSCC.begin(), E = CurSCC.end();
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	410 I != E; ++I) {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	411 if (I != CurSCC.begin()) OS << ", ";
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	412 (*I)->print(OS);
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	413 }
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	414 OS.flush();
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	415 #endif
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	416 dumpPassInfo(P, EXECUTION_MSG, ON_CG_MSG, Functions);
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	417 }
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	418 dumpRequiredSet(P);
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	419
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	420 initializeAnalysisImpl(P);
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	421
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	422 // Actually run this pass on the current SCC.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	423 Changed \|= RunPassOnSCC(P, CurSCC, CG,
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	424 CallGraphUpToDate, DevirtualizedCall);
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	425
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	426 if (Changed)
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	427 dumpPassInfo(P, MODIFICATION_MSG, ON_CG_MSG, "");
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	428 dumpPreservedSet(P);
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	429
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	430 verifyPreservedAnalysis(P);
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	431 removeNotPreservedAnalysis(P);
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	432 recordAvailableAnalysis(P);
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	433 removeDeadPasses(P, "", ON_CG_MSG);
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	434 }
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	435
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	436 // If the callgraph was left out of date (because the last pass run was a
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	437 // functionpass), refresh it before we move on to the next SCC.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	438 if (!CallGraphUpToDate)
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	439 DevirtualizedCall \|= RefreshCallGraph(CurSCC, CG, false);
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	440 return Changed;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	441 }
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	442
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	443 /// Execute all of the passes scheduled for execution. Keep track of
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	444 /// whether any of the passes modifies the module, and if so, return true.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	445 bool CGPassManager::runOnModule(Module &M) {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	446 CallGraph &CG = getAnalysis<CallGraphWrapperPass>().getCallGraph();
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	447 bool Changed = doInitialization(CG);
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	448
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	449 // Walk the callgraph in bottom-up SCC order.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	450 scc_iterator<CallGraph*> CGI = scc_begin(&CG);
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	451
120 1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	452 CallGraphSCC CurSCC(CG, &CGI);
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	453 while (!CGI.isAtEnd()) {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	454 // Copy the current SCC and increment past it so that the pass can hack
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	455 // on the SCC if it wants to without invalidating our iterator.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	456 const std::vector<CallGraphNode > &NodeVec = CGI;
120 1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	457 CurSCC.initialize(NodeVec);
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	458 ++CGI;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	459
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	460 // At the top level, we run all the passes in this pass manager on the
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	461 // functions in this SCC. However, we support iterative compilation in the
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	462 // case where a function pass devirtualizes a call to a function. For
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	463 // example, it is very common for a function pass (often GVN or instcombine)
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	464 // to eliminate the addressing that feeds into a call. With that improved
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	465 // information, we would like the call to be an inline candidate, infer
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	466 // mod-ref information etc.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	467 //
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	468 // Because of this, we allow iteration up to a specified iteration count.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	469 // This only happens in the case of a devirtualized call, so we only burn
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	470 // compile time in the case that we're making progress. We also have a hard
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	471 // iteration count limit in case there is crazy code.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	472 unsigned Iteration = 0;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	473 bool DevirtualizedCall = false;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	474 do {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	475 DEBUG(if (Iteration)
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	476 dbgs() << " SCCPASSMGR: Re-visiting SCC, iteration #"
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	477 << Iteration << '\n');
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	478 DevirtualizedCall = false;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	479 Changed \|= RunAllPassesOnSCC(CurSCC, CG, DevirtualizedCall);
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	480 } while (Iteration++ < MaxIterations && DevirtualizedCall);
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	481
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	482 if (DevirtualizedCall)
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	483 DEBUG(dbgs() << " CGSCCPASSMGR: Stopped iteration after " << Iteration
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	484 << " times, due to -max-cg-scc-iterations\n");
121 803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	485
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	486 MaxSCCIterations.updateMax(Iteration);
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	487 }
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	488 Changed \|= doFinalization(CG);
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	489 return Changed;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	490 }
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	491
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	492 /// Initialize CG
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	493 bool CGPassManager::doInitialization(CallGraph &CG) {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	494 bool Changed = false;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	495 for (unsigned i = 0, e = getNumContainedPasses(); i != e; ++i) {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	496 if (PMDataManager *PM = getContainedPass(i)->getAsPMDataManager()) {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	497 assert(PM->getPassManagerType() == PMT_FunctionPassManager &&
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	498 "Invalid CGPassManager member");
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	499 Changed \|= ((FPPassManager*)PM)->doInitialization(CG.getModule());
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	500 } else {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	501 Changed \|= ((CallGraphSCCPass*)getContainedPass(i))->doInitialization(CG);
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	502 }
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	503 }
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	504 return Changed;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	505 }
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	506
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	507 /// Finalize CG
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	508 bool CGPassManager::doFinalization(CallGraph &CG) {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	509 bool Changed = false;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	510 for (unsigned i = 0, e = getNumContainedPasses(); i != e; ++i) {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	511 if (PMDataManager *PM = getContainedPass(i)->getAsPMDataManager()) {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	512 assert(PM->getPassManagerType() == PMT_FunctionPassManager &&
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	513 "Invalid CGPassManager member");
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	514 Changed \|= ((FPPassManager*)PM)->doFinalization(CG.getModule());
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	515 } else {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	516 Changed \|= ((CallGraphSCCPass*)getContainedPass(i))->doFinalization(CG);
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	517 }
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	518 }
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	519 return Changed;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	520 }
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	521
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	522 //===----------------------------------------------------------------------===//
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	523 // CallGraphSCC Implementation
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	524 //===----------------------------------------------------------------------===//
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	525
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	526 /// This informs the SCC and the pass manager that the specified
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	527 /// Old node has been deleted, and New is to be used in its place.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	528 void CallGraphSCC::ReplaceNode(CallGraphNode Old, CallGraphNode New) {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	529 assert(Old != New && "Should not replace node with self");
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	530 for (unsigned i = 0; ; ++i) {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	531 assert(i != Nodes.size() && "Node not in SCC");
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	532 if (Nodes[i] != Old) continue;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	533 Nodes[i] = New;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	534 break;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	535 }
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	536
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	537 // Update the active scc_iterator so that it doesn't contain dangling
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	538 // pointers to the old CallGraphNode.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	539 scc_iterator<CallGraph> CGI = (scc_iterator<CallGraph>)Context;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	540 CGI->ReplaceNode(Old, New);
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	541 }
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	542
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	543 //===----------------------------------------------------------------------===//
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	544 // CallGraphSCCPass Implementation
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	545 //===----------------------------------------------------------------------===//
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	546
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	547 /// Assign pass manager to manage this pass.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	548 void CallGraphSCCPass::assignPassManager(PMStack &PMS,
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	549 PassManagerType PreferredType) {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	550 // Find CGPassManager
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	551 while (!PMS.empty() &&
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	552 PMS.top()->getPassManagerType() > PMT_CallGraphPassManager)
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	553 PMS.pop();
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	554
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	555 assert(!PMS.empty() && "Unable to handle Call Graph Pass");
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	556 CGPassManager *CGP;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	557
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	558 if (PMS.top()->getPassManagerType() == PMT_CallGraphPassManager)
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	559 CGP = (CGPassManager*)PMS.top();
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	560 else {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	561 // Create new Call Graph SCC Pass Manager if it does not exist.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	562 assert(!PMS.empty() && "Unable to create Call Graph Pass Manager");
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	563 PMDataManager *PMD = PMS.top();
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	564
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	565 // [1] Create new Call Graph Pass Manager
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	566 CGP = new CGPassManager();
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	567
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	568 // [2] Set up new manager's top level manager
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	569 PMTopLevelManager *TPM = PMD->getTopLevelManager();
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	570 TPM->addIndirectPassManager(CGP);
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	571
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	572 // [3] Assign manager to manage this new manager. This may create
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	573 // and push new managers into PMS
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	574 Pass *P = CGP;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	575 TPM->schedulePass(P);
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	576
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	577 // [4] Push new manager into PMS
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	578 PMS.push(CGP);
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	579 }
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	580
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	581 CGP->add(this);
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	582 }
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	583
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	584 /// For this class, we declare that we require and preserve the call graph.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	585 /// If the derived class implements this method, it should
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	586 /// always explicitly call the implementation here.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	587 void CallGraphSCCPass::getAnalysisUsage(AnalysisUsage &AU) const {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	588 AU.addRequired<CallGraphWrapperPass>();
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	589 AU.addPreserved<CallGraphWrapperPass>();
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	590 }
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	591
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	592 //===----------------------------------------------------------------------===//
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	593 // PrintCallGraphPass Implementation
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	594 //===----------------------------------------------------------------------===//
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	595
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	596 namespace {
121 803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	597
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	598 /// PrintCallGraphPass - Print a Module corresponding to a call graph.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	599 ///
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	600 class PrintCallGraphPass : public CallGraphSCCPass {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	601 std::string Banner;
121 803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	602 raw_ostream &OS; // raw_ostream to print on.
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	603
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	604 public:
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	605 static char ID;
121 803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	606
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	607 PrintCallGraphPass(const std::string &B, raw_ostream &OS)
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	608 : CallGraphSCCPass(ID), Banner(B), OS(OS) {}
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	609
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	610 void getAnalysisUsage(AnalysisUsage &AU) const override {
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	611 AU.setPreservesAll();
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	612 }
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	613
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	614 bool runOnSCC(CallGraphSCC &SCC) override {
121 803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	615 bool BannerPrinted = false;
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	616 auto PrintBannerOnce = [&] () {
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	617 if (BannerPrinted)
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	618 return;
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	619 OS << Banner;
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	620 BannerPrinted = true;
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	621 };
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	622 for (CallGraphNode *CGN : SCC) {
121 803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	623 if (Function *F = CGN->getFunction()) {
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	624 if (!F->isDeclaration() && isFunctionInPrintList(F->getName())) {
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	625 PrintBannerOnce();
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	626 F->print(OS);
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	627 }
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	628 } else if (isFunctionInPrintList("*")) {
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	629 PrintBannerOnce();
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	630 OS << "\nPrinting <null> Function\n";
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	631 }
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	632 }
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	633 return false;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	634 }
121 803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	635
803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	636 StringRef getPassName() const override { return "Print CallGraph IR"; }
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	637 };
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	638
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	639 } // end anonymous namespace.
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	640
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	641 char PrintCallGraphPass::ID = 0;
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	642
121 803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	643 Pass *CallGraphSCCPass::createPrinterPass(raw_ostream &OS,
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	644 const std::string &Banner) const {
121 803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	645 return new PrintCallGraphPass(Banner, OS);
95 afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	646 }
afa8332a0e37 LLVM 3.8 Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> parents: diff changeset	647
120 1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	648 bool CallGraphSCCPass::skipSCC(CallGraphSCC &SCC) const {
1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	649 return !SCC.getCallGraph().getModule()
1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	650 .getContext()
1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	651 .getOptBisect()
1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	652 .shouldRunPass(this, SCC);
1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	653 }
1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	654
1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	655 char DummyCGSCCPass::ID = 0;
121 803732b1fca8 LLVM 5.0 kono parents: 120 diff changeset	656
120 1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	657 INITIALIZE_PASS(DummyCGSCCPass, "DummyCGSCCPass", "DummyCGSCCPass", false,
1172e4bd9c6f update 4.0.0 mir3636 parents: 100 diff changeset	658 false)

Mercurial > hg > CbC > CbC_llvm

annotate lib/Analysis/CallGraphSCCPass.cpp @ 121:803732b1fca8