diff options
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Analysis/DependenceAnalysis.cpp | 17 |
1 files changed, 7 insertions, 10 deletions
diff --git a/llvm/lib/Analysis/DependenceAnalysis.cpp b/llvm/lib/Analysis/DependenceAnalysis.cpp index a3c8bc8ad2f..c343867e09f 100644 --- a/llvm/lib/Analysis/DependenceAnalysis.cpp +++ b/llvm/lib/Analysis/DependenceAnalysis.cpp @@ -170,25 +170,25 @@ void DependenceAnalysisWrapperPass::getAnalysisUsage(AnalysisUsage &AU) const { AU.addRequiredTransitive<LoopInfoWrapperPass>(); } - // Used to test the dependence analyzer. -// Looks through the function, noting loads and stores. +// Looks through the function, noting instructions that may access memory. // Calls depends() on every possible pair and prints out the result. // Ignores all other instructions. static void dumpExampleDependence(raw_ostream &OS, DependenceInfo *DA) { auto *F = DA->getFunction(); for (inst_iterator SrcI = inst_begin(F), SrcE = inst_end(F); SrcI != SrcE; ++SrcI) { - if (isa<StoreInst>(*SrcI) || isa<LoadInst>(*SrcI)) { + if (SrcI->mayReadOrWriteMemory()) { for (inst_iterator DstI = SrcI, DstE = inst_end(F); DstI != DstE; ++DstI) { - if (isa<StoreInst>(*DstI) || isa<LoadInst>(*DstI)) { - OS << "da analyze - "; + if (DstI->mayReadOrWriteMemory()) { + OS << "Src:" << *SrcI << " --> Dst:" << *DstI << "\n"; + OS << " da analyze - "; if (auto D = DA->depends(&*SrcI, &*DstI, true)) { D->dump(OS); for (unsigned Level = 1; Level <= D->getLevels(); Level++) { if (D->isSplitable(Level)) { - OS << "da analyze - split level = " << Level; + OS << " da analyze - split level = " << Level; OS << ", iteration = " << *DA->getSplitIteration(*D, Level); OS << "!\n"; } @@ -3413,8 +3413,7 @@ DependenceInfo::depends(Instruction *Src, Instruction *Dst, if (Src == Dst) PossiblyLoopIndependent = false; - if ((!Src->mayReadFromMemory() && !Src->mayWriteToMemory()) || - (!Dst->mayReadFromMemory() && !Dst->mayWriteToMemory())) + if (!(Src->mayReadOrWriteMemory() && Dst->mayReadOrWriteMemory())) // if both instructions don't reference memory, there's no dependence return nullptr; @@ -3786,8 +3785,6 @@ DependenceInfo::depends(Instruction *Src, Instruction *Dst, return std::make_unique<FullDependence>(std::move(Result)); } - - //===----------------------------------------------------------------------===// // getSplitIteration - // Rather than spend rarely-used space recording the splitting iteration |
