diff options
| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2010-07-03 00:04:37 +0000 |
|---|---|---|
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2010-07-03 00:04:37 +0000 |
| commit | a87d098f0f4caff32ab45a5ad8653c1a4d4c3a8e (patch) | |
| tree | 5963df402c4f6ba2641e0e869ddafa71fd5aa850 /lib/CodeGen/ProcessImplicitDefs.cpp | |
| parent | f269bb4a01cb9e38bd6423351dcaddb6f0f1c9f1 (diff) | |
| download | external_llvm-a87d098f0f4caff32ab45a5ad8653c1a4d4c3a8e.tar.gz external_llvm-a87d098f0f4caff32ab45a5ad8653c1a4d4c3a8e.tar.bz2 external_llvm-a87d098f0f4caff32ab45a5ad8653c1a4d4c3a8e.zip | |
Detect and handle COPY in many places.
This code is transitional, it will soon be possible to eliminate
isExtractSubreg, isInsertSubreg, and isMoveInstr in most places.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107547 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/ProcessImplicitDefs.cpp')
| -rw-r--r-- | lib/CodeGen/ProcessImplicitDefs.cpp | 19 |
1 files changed, 11 insertions, 8 deletions
diff --git a/lib/CodeGen/ProcessImplicitDefs.cpp b/lib/CodeGen/ProcessImplicitDefs.cpp index 62f525fa1d..0195918a11 100644 --- a/lib/CodeGen/ProcessImplicitDefs.cpp +++ b/lib/CodeGen/ProcessImplicitDefs.cpp @@ -46,14 +46,15 @@ bool ProcessImplicitDefs::CanTurnIntoImplicitDef(MachineInstr *MI, const TargetInstrInfo *tii_) { unsigned SrcReg, DstReg, SrcSubReg, DstSubReg; if (tii_->isMoveInstr(*MI, SrcReg, DstReg, SrcSubReg, DstSubReg) && - Reg == SrcReg && SrcSubReg == 0 && DstSubReg == 0) + Reg == SrcReg && DstSubReg == 0) return true; - if (OpIdx == 2 && MI->isSubregToReg()) - return true; - if (OpIdx == 1 && MI->isExtractSubreg()) - return true; - return false; + switch(OpIdx) { + case 1: return (MI->isExtractSubreg() || MI->isCopy()) && + MI->getOperand(0).getSubReg() == 0; + case 2: return MI->isSubregToReg() && MI->getOperand(0).getSubReg() == 0; + default: return false; + } } /// processImplicitDefs - Process IMPLICIT_DEF instructions and make sure @@ -219,8 +220,10 @@ bool ProcessImplicitDefs::runOnMachineFunction(MachineFunction &fn) { // Turn a copy use into an implicit_def. unsigned SrcReg, DstReg, SrcSubReg, DstSubReg; - if (tii_->isMoveInstr(*RMI, SrcReg, DstReg, SrcSubReg, DstSubReg) && - Reg == SrcReg && SrcSubReg == 0 && DstSubReg == 0) { + if ((RMI->isCopy() && RMI->getOperand(1).getReg() == Reg && + RMI->getOperand(0).getSubReg() == 0) || + (tii_->isMoveInstr(*RMI, SrcReg, DstReg, SrcSubReg, DstSubReg) && + Reg == SrcReg && DstSubReg == 0)) { RMI->setDesc(tii_->get(TargetOpcode::IMPLICIT_DEF)); bool isKill = false; |