diff options
| -rw-r--r-- | llvm/lib/Target/Hexagon/HexagonFrameLowering.cpp | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/llvm/lib/Target/Hexagon/HexagonFrameLowering.cpp b/llvm/lib/Target/Hexagon/HexagonFrameLowering.cpp index c37bd4a63f4..9c177c21962 100644 --- a/llvm/lib/Target/Hexagon/HexagonFrameLowering.cpp +++ b/llvm/lib/Target/Hexagon/HexagonFrameLowering.cpp @@ -159,6 +159,12 @@ static cl::opt<bool> UseAllocframe("use-allocframe", cl::init(true), static cl::opt<bool> OptimizeSpillSlots("hexagon-opt-spill", cl::Hidden, cl::init(true), cl::desc("Optimize spill slots")); +#ifndef NDEBUG +static cl::opt<unsigned> SpillOptMax("spill-opt-max", cl::Hidden, + cl::init(UINT_MAX)); +static unsigned SpillOptCount = 0; +#endif + namespace llvm { void initializeHexagonCallFrameInformationPass(PassRegistry&); @@ -1427,7 +1433,6 @@ bool HexagonFrameLowering::assignCalleeSavedSpillSlots(MachineFunction &MF, return true; } - bool HexagonFrameLowering::expandCopy(MachineBasicBlock &B, MachineBasicBlock::iterator It, MachineRegisterInfo &MRI, const HexagonInstrInfo &HII, SmallVectorImpl<unsigned> &NewRegs) const { @@ -2126,6 +2131,10 @@ void HexagonFrameLowering::optimizeSpillSlots(MachineFunction &MF, } }); +#ifndef NDEBUG + bool HasOptLimit = SpillOptMax.getPosition(); +#endif + // eliminate loads, when all loads eliminated, eliminate all stores. for (auto &B : MF) { auto F = BlockIndexes.find(&B); @@ -2160,6 +2169,13 @@ void HexagonFrameLowering::optimizeSpillSlots(MachineFunction &MF, DEBUG(dbgs() << "Replacement reg:" << PrintReg(FoundR, &HRI) << '\n'); if (FoundR == 0) continue; +#ifndef NDEBUG + if (HasOptLimit) { + if (SpillOptCount >= SpillOptMax) + return; + SpillOptCount++; + } +#endif // Generate the copy-in: "FoundR = COPY SrcR" at the store location. MachineBasicBlock::iterator StartIt = SI, NextIt; @@ -2221,7 +2237,6 @@ void HexagonFrameLowering::optimizeSpillSlots(MachineFunction &MF, } } - void HexagonFrameLowering::expandAlloca(MachineInstr *AI, const HexagonInstrInfo &HII, unsigned SP, unsigned CF) const { MachineBasicBlock &MB = *AI->getParent(); |
