diff options
Diffstat (limited to 'lib/CodeGen/LLVMTargetMachine.cpp')
| -rw-r--r-- | lib/CodeGen/LLVMTargetMachine.cpp | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/lib/CodeGen/LLVMTargetMachine.cpp b/lib/CodeGen/LLVMTargetMachine.cpp index 759610a082..90501f0a56 100644 --- a/lib/CodeGen/LLVMTargetMachine.cpp +++ b/lib/CodeGen/LLVMTargetMachine.cpp @@ -53,6 +53,8 @@ static cl::opt<bool> DisableTailDuplicate("disable-tail-duplicate", cl::Hidden, cl::desc("Disable tail duplication")); static cl::opt<bool> DisableEarlyTailDup("disable-early-taildup", cl::Hidden, cl::desc("Disable pre-register allocation tail duplication")); +static cl::opt<bool> EnableBlockPlacement("enable-block-placement", + cl::Hidden, cl::desc("Enable probability-driven block placement")); static cl::opt<bool> DisableCodePlace("disable-code-place", cl::Hidden, cl::desc("Disable code placement")); static cl::opt<bool> DisableSSC("disable-ssc", cl::Hidden, @@ -486,8 +488,16 @@ bool LLVMTargetMachine::addCommonCodeGenPasses(PassManagerBase &PM, PM.add(createGCInfoPrinter(dbgs())); if (OptLevel != CodeGenOpt::None && !DisableCodePlace) { - PM.add(createCodePlacementOptPass()); - printNoVerify(PM, "After CodePlacementOpt"); + if (EnableBlockPlacement) { + // MachineBlockPlacement is an experimental pass which is disabled by + // default currently. Eventually it should subsume CodePlacementOpt, so + // when enabled, the other is disabled. + PM.add(createMachineBlockPlacementPass()); + printNoVerify(PM, "After MachineBlockPlacement"); + } else { + PM.add(createCodePlacementOptPass()); + printNoVerify(PM, "After CodePlacementOpt"); + } } if (addPreEmitPass(PM, OptLevel)) |