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Fix PR10029 - VerifyCoalescing failure on patterns_dfa.c of 445.gobmk.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132181 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Cameron Zwarich
2011-05-27 05:04:51 +00:00
parent 3a5d7d0665
commit f031d0977f
2 changed files with 58 additions and 2 deletions
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lib/CodeGen/UnreachableBlockElim.cpp
+5 -2
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@@ -196,8 +196,11 @@ bool UnreachableMachineBlockElim::runOnMachineFunction(MachineFunction &F) {
temp->eraseFromParent();
ModifiedPHI = true;
if (Input != Output)
F.getRegInfo().replaceRegWith(Output, Input);
if (Input != Output) {
MachineRegisterInfo &MRI = F.getRegInfo();
MRI.constrainRegClass(Input, MRI.getRegClass(Output));
MRI.replaceRegWith(Output, Input);
}
continue;
}