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| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2010-07-07 00:32:25 +0000 |
|---|---|---|
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2010-07-07 00:32:25 +0000 |
| commit | 205f02e47fa577e263b11fd132c36c378303b243 (patch) | |
| tree | 79ffbfbecf7d39d3b8789af4953e194fe1c7963d /lib/CodeGen/ProcessImplicitDefs.cpp | |
| parent | c1c0833f5c20e2558f5767735b60fdae654f8fe2 (diff) | |
| download | external_llvm-205f02e47fa577e263b11fd132c36c378303b243.zip external_llvm-205f02e47fa577e263b11fd132c36c378303b243.tar.gz external_llvm-205f02e47fa577e263b11fd132c36c378303b243.tar.bz2 | |
Revert "Remove references to INSERT_SUBREG after de-SSA" r107725.
Buildbot breakage.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107744 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/ProcessImplicitDefs.cpp')
| -rw-r--r-- | lib/CodeGen/ProcessImplicitDefs.cpp | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/lib/CodeGen/ProcessImplicitDefs.cpp b/lib/CodeGen/ProcessImplicitDefs.cpp index 2caef08..80121ca 100644 --- a/lib/CodeGen/ProcessImplicitDefs.cpp +++ b/lib/CodeGen/ProcessImplicitDefs.cpp @@ -102,6 +102,21 @@ bool ProcessImplicitDefs::runOnMachineFunction(MachineFunction &fn) { continue; } + if (MI->isInsertSubreg()) { + MachineOperand &MO = MI->getOperand(2); + if (ImpDefRegs.count(MO.getReg())) { + // %reg1032<def> = INSERT_SUBREG %reg1032, undef, 2 + // This is an identity copy, eliminate it now. + if (MO.isKill()) { + LiveVariables::VarInfo& vi = lv_->getVarInfo(MO.getReg()); + vi.removeKill(MI); + } + MI->eraseFromParent(); + Changed = true; + continue; + } + } + // Eliminate %reg1032:sub<def> = COPY undef. if (MI->isCopy() && MI->getOperand(0).getSubReg()) { MachineOperand &MO = MI->getOperand(1); |