diff options
Diffstat (limited to 'lib/CodeGen/TailDuplication.cpp')
| -rw-r--r-- | lib/CodeGen/TailDuplication.cpp | 19 |
1 files changed, 10 insertions, 9 deletions
diff --git a/lib/CodeGen/TailDuplication.cpp b/lib/CodeGen/TailDuplication.cpp index 075db803bd23..a815b364d54e 100644 --- a/lib/CodeGen/TailDuplication.cpp +++ b/lib/CodeGen/TailDuplication.cpp @@ -69,7 +69,7 @@ namespace { public: static char ID; explicit TailDuplicatePass(bool PreRA) : - MachineFunctionPass(&ID), PreRegAlloc(PreRA) {} + MachineFunctionPass(ID), PreRegAlloc(PreRA) {} virtual bool runOnMachineFunction(MachineFunction &MF); virtual const char *getPassName() const { return "Tail Duplication"; } @@ -254,14 +254,15 @@ bool TailDuplicatePass::TailDuplicateBlocks(MachineFunction &MF) { // SSA form. for (unsigned i = 0, e = Copies.size(); i != e; ++i) { MachineInstr *Copy = Copies[i]; - unsigned Src, Dst, SrcSR, DstSR; - if (TII->isMoveInstr(*Copy, Src, Dst, SrcSR, DstSR)) { - MachineRegisterInfo::use_iterator UI = MRI->use_begin(Src); - if (++UI == MRI->use_end()) { - // Copy is the only use. Do trivial copy propagation here. - MRI->replaceRegWith(Dst, Src); - Copy->eraseFromParent(); - } + if (!Copy->isCopy()) + continue; + unsigned Dst = Copy->getOperand(0).getReg(); + unsigned Src = Copy->getOperand(1).getReg(); + MachineRegisterInfo::use_iterator UI = MRI->use_begin(Src); + if (++UI == MRI->use_end()) { + // Copy is the only use. Do trivial copy propagation here. + MRI->replaceRegWith(Dst, Src); + Copy->eraseFromParent(); } } |