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Don't do illegal cross-class coalescing.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98044 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen
2010-03-09 03:56:06 +00:00
parent 31f94c7c22
commit 1552cccc76
1 changed files with 1 additions and 1 deletions
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lib/CodeGen/MachineCSE.cpp
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@@ -95,7 +95,7 @@ bool MachineCSE::PerformTrivialCoalescing(MachineInstr *MI,
!SrcSubIdx && !DstSubIdx) {
const TargetRegisterClass *SRC = MRI->getRegClass(SrcReg);
const TargetRegisterClass *RC = MRI->getRegClass(Reg);
if (SRC == RC || SRC->hasSubClass(RC) || RC->hasSubClass(SRC)) {
if (SRC == RC || RC->hasSubClass(SRC)) {
DEBUG(dbgs() << "Coalescing: " << *DefMI);
DEBUG(dbgs() << "*** to: " << *MI);
MO.setReg(SrcReg);