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| author | ed <ed@FreeBSD.org> | 2009-07-04 13:58:26 +0000 |
|---|---|---|
| committer | ed <ed@FreeBSD.org> | 2009-07-04 13:58:26 +0000 |
| commit | 72621d11de5b873f1695f391eb95f0b336c3d2d4 (patch) | |
| tree | 84360c8989c912127a383af37c4b1aa5767bd16e /lib/CodeGen/SimpleRegisterCoalescing.cpp | |
| parent | cf5cd875b51255602afaed29deb636b66b295671 (diff) | |
| download | FreeBSD-src-72621d11de5b873f1695f391eb95f0b336c3d2d4.zip FreeBSD-src-72621d11de5b873f1695f391eb95f0b336c3d2d4.tar.gz | |
Import LLVM 74788.
Diffstat (limited to 'lib/CodeGen/SimpleRegisterCoalescing.cpp')
| -rw-r--r-- | lib/CodeGen/SimpleRegisterCoalescing.cpp | 19 |
1 files changed, 14 insertions, 5 deletions
diff --git a/lib/CodeGen/SimpleRegisterCoalescing.cpp b/lib/CodeGen/SimpleRegisterCoalescing.cpp index c2105e6..7e7d6b8 100644 --- a/lib/CodeGen/SimpleRegisterCoalescing.cpp +++ b/lib/CodeGen/SimpleRegisterCoalescing.cpp @@ -2669,19 +2669,28 @@ SimpleRegisterCoalescing::TurnCopyIntoImpDef(MachineBasicBlock::iterator &I, CopyMI->setDesc(tii_->get(TargetInstrInfo::IMPLICIT_DEF)); for (int i = CopyMI->getNumOperands() - 1, e = 0; i > e; --i) CopyMI->RemoveOperand(i); + CopyMI->getOperand(0).setIsUndef(); bool NoUse = mri_->use_empty(SrcReg); if (NoUse) { - for (MachineRegisterInfo::reg_iterator I = mri_->reg_begin(SrcReg), - E = mri_->reg_end(); I != E; ) { - assert(I.getOperand().isDef()); - MachineInstr *DefMI = &*I; - ++I; + for (MachineRegisterInfo::reg_iterator RI = mri_->reg_begin(SrcReg), + RE = mri_->reg_end(); RI != RE; ) { + assert(RI.getOperand().isDef()); + MachineInstr *DefMI = &*RI; + ++RI; // The implicit_def source has no other uses, delete it. assert(DefMI->getOpcode() == TargetInstrInfo::IMPLICIT_DEF); li_->RemoveMachineInstrFromMaps(DefMI); DefMI->eraseFromParent(); } } + + // Mark uses of implicit_def isUndef. + for (MachineRegisterInfo::use_iterator RI = mri_->use_begin(DstReg), + RE = mri_->use_end(); RI != RE; ++RI) { + assert((*RI).getParent() == MBB); + RI.getOperand().setIsUndef(); + } + ++I; return true; } |
