diff options
Diffstat (limited to 'lib/CodeGen/Passes.cpp')
| -rw-r--r-- | lib/CodeGen/Passes.cpp | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/lib/CodeGen/Passes.cpp b/lib/CodeGen/Passes.cpp index 69d6d00..56526f2 100644 --- a/lib/CodeGen/Passes.cpp +++ b/lib/CodeGen/Passes.cpp @@ -88,6 +88,10 @@ PrintMachineInstrs("print-machineinstrs", cl::ValueOptional, cl::desc("Print machine instrs"), cl::value_desc("pass-name"), cl::init("option-unspecified")); +// Experimental option to run live inteerval analysis early. +static cl::opt<bool> EarlyLiveIntervals("early-live-intervals", cl::Hidden, + cl::desc("Run live interval analysis earlier in the pipeline")); + /// Allow standard passes to be disabled by command line options. This supports /// simple binary flags that either suppress the pass or do nothing. /// i.e. -disable-mypass=false has no effect. @@ -452,7 +456,8 @@ void TargetPassConfig::addMachinePasses() { printAndVerify("After Instruction Selection"); // Expand pseudo-instructions emitted by ISel. - addPass(&ExpandISelPseudosID); + if (addPass(&ExpandISelPseudosID)) + printAndVerify("After ExpandISelPseudos"); // Add passes that optimize machine instructions in SSA form. if (getOptLevel() != CodeGenOpt::None) { @@ -648,6 +653,11 @@ void TargetPassConfig::addOptimizedRegAlloc(FunctionPass *RegAllocPass) { addPass(&MachineLoopInfoID); addPass(&PHIEliminationID); } + + // Eventually, we want to run LiveIntervals before PHI elimination. + if (EarlyLiveIntervals) + addPass(&LiveIntervalsID); + addPass(&TwoAddressInstructionPassID); if (EnableStrongPHIElim) |