diff options
Diffstat (limited to 'llvm/lib/Target/X86/X86AvoidStoreForwardingBlocks.cpp')
| -rw-r--r-- | llvm/lib/Target/X86/X86AvoidStoreForwardingBlocks.cpp | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/llvm/lib/Target/X86/X86AvoidStoreForwardingBlocks.cpp b/llvm/lib/Target/X86/X86AvoidStoreForwardingBlocks.cpp index 3ac0b1ae514..11a3ff1bd57 100644 --- a/llvm/lib/Target/X86/X86AvoidStoreForwardingBlocks.cpp +++ b/llvm/lib/Target/X86/X86AvoidStoreForwardingBlocks.cpp @@ -406,7 +406,9 @@ void X86AvoidSFBPass::buildCopy(MachineInstr *LoadInst, unsigned NLoadOpcode, // If the load and store are consecutive, use the loadInst location to // reduce register pressure. MachineInstr *StInst = StoreInst; - if (StoreInst->getPrevNode() == LoadInst) + auto PrevInstrIt = skipDebugInstructionsBackward( + std::prev(MachineBasicBlock::instr_iterator(StoreInst)), MBB->instr_begin()); + if (PrevInstrIt.getNodePtr() == LoadInst) StInst = LoadInst; MachineInstr *NewStore = BuildMI(*MBB, StInst, StInst->getDebugLoc(), TII->get(NStoreOpcode)) @@ -530,7 +532,7 @@ void X86AvoidSFBPass::findPotentiallylBlockedCopies(MachineFunction &MF) { if (!isPotentialBlockedMemCpyLd(MI.getOpcode())) continue; int DefVR = MI.getOperand(0).getReg(); - if (!MRI->hasOneUse(DefVR)) + if (!MRI->hasOneNonDBGUse(DefVR)) continue; for (auto UI = MRI->use_nodbg_begin(DefVR), UE = MRI->use_nodbg_end(); UI != UE;) { |
