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Eliminate dead code after remat.

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This will remove the original def once it has no more uses.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157104 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen 2012-05-19 05:25:59 +00:00
parent 67ccb29cec
commit 1dc6d7cbb5
1 changed files with 3 additions and 1 deletions
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4
lib/CodeGen/RegisterCoalescer.cpp
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@ -870,7 +870,9 @@ bool RegisterCoalescer::reMaterializeTrivialDef(LiveInterval &SrcInt,
++NumReMats;
// The source interval can become smaller because we removed a use.
LIS->shrinkToUses(&SrcInt);
LIS->shrinkToUses(&SrcInt, &DeadDefs);
if (!DeadDefs.empty())
eliminateDeadDefs();
return true;
}