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Invalidate last use of a reused register if the use is a deleted noop copy.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34839 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2007-03-02 05:41:42 +00:00
parent 82932a5e4a
commit c3dd314b78
1 changed files with 1 additions and 0 deletions
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lib/CodeGen/VirtRegMap.cpp
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@ -937,6 +937,7 @@ void LocalSpiller::RewriteMBB(MachineBasicBlock &MBB, VirtRegMap &VRM) {
DOUT << "Removing now-noop copy: " << MI;
MBB.erase(&MI);
VRM.RemoveFromFoldedVirtMap(&MI);
Spills.UpdateLastUse(Src, NULL);
Spills.disallowClobberPhysReg(VirtReg);
goto ProcessNextInst;
}