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| author | rdivacky <rdivacky@FreeBSD.org> | 2009-12-01 11:07:05 +0000 |
|---|---|---|
| committer | rdivacky <rdivacky@FreeBSD.org> | 2009-12-01 11:07:05 +0000 |
| commit | e7908924d847e63b02bc82bfaa1709ab9c774dcd (patch) | |
| tree | ffe0478472eaa0686f11cb02c6df7d257b8719b0 /lib/CodeGen/LLVMTargetMachine.cpp | |
| parent | bf68f1ea49e39c4194f339ddd4421b0c3a31988b (diff) | |
| download | FreeBSD-src-e7908924d847e63b02bc82bfaa1709ab9c774dcd.zip FreeBSD-src-e7908924d847e63b02bc82bfaa1709ab9c774dcd.tar.gz | |
Update LLVM to r90226.
Diffstat (limited to 'lib/CodeGen/LLVMTargetMachine.cpp')
| -rw-r--r-- | lib/CodeGen/LLVMTargetMachine.cpp | 23 |
1 files changed, 19 insertions, 4 deletions
diff --git a/lib/CodeGen/LLVMTargetMachine.cpp b/lib/CodeGen/LLVMTargetMachine.cpp index 0db459b..242cba5 100644 --- a/lib/CodeGen/LLVMTargetMachine.cpp +++ b/lib/CodeGen/LLVMTargetMachine.cpp @@ -35,6 +35,8 @@ static cl::opt<bool> DisablePostRA("disable-post-ra", cl::Hidden, cl::desc("Disable Post Regalloc")); static cl::opt<bool> DisableBranchFold("disable-branch-fold", cl::Hidden, cl::desc("Disable branch folding")); +static cl::opt<bool> DisableTailDuplicate("disable-tail-duplicate", cl::Hidden, + cl::desc("Disable tail duplication")); static cl::opt<bool> DisableCodePlace("disable-code-place", cl::Hidden, cl::desc("Disable code placement")); static cl::opt<bool> DisableSSC("disable-ssc", cl::Hidden, @@ -66,6 +68,11 @@ static cl::opt<cl::boolOrDefault> EnableFastISelOption("fast-isel", cl::Hidden, cl::desc("Enable the \"fast\" instruction selector")); +// Enable or disable an experimental optimization to split GEPs +// and run a special GVN pass which does not examine loads, in +// an effort to factor out redundancy implicit in complex GEPs. +static cl::opt<bool> EnableSplitGEPGVN("split-gep-gvn", cl::Hidden, + cl::desc("Split GEPs and run no-load GVN")); LLVMTargetMachine::LLVMTargetMachine(const Target &T, const std::string &TargetTriple) @@ -223,6 +230,12 @@ bool LLVMTargetMachine::addCommonCodeGenPasses(PassManagerBase &PM, CodeGenOpt::Level OptLevel) { // Standard LLVM-Level Passes. + // Optionally, tun split-GEPs and no-load GVN. + if (EnableSplitGEPGVN) { + PM.add(createGEPSplitterPass()); + PM.add(createGVNPass(/*NoPRE=*/false, /*NoLoads=*/true)); + } + // Run loop strength reduction before anything else. if (OptLevel != CodeGenOpt::None && !DisableLSR) { PM.add(createLoopStrengthReducePass(getTargetLowering())); @@ -333,15 +346,17 @@ bool LLVMTargetMachine::addCommonCodeGenPasses(PassManagerBase &PM, printAndVerify(PM, "After BranchFolding"); } + // Tail duplication. + if (OptLevel != CodeGenOpt::None && !DisableTailDuplicate) { + PM.add(createTailDuplicatePass()); + printAndVerify(PM, "After TailDuplicate"); + } + PM.add(createGCMachineCodeAnalysisPass()); if (PrintGCInfo) PM.add(createGCInfoPrinter(errs())); - // Fold redundant debug labels. - PM.add(createDebugLabelFoldingPass()); - printAndVerify(PM, "After DebugLabelFolding"); - if (OptLevel != CodeGenOpt::None && !DisableCodePlace) { PM.add(createCodePlacementOptPass()); printAndVerify(PM, "After CodePlacementOpt"); |
