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Don't transfer unused values to the new intervals formed by splitting.

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llvm-svn: 117673
This commit is contained in:
Jakob Stoklund Olesen 2010-10-29 17:47:49 +00:00
parent edec5cc6b8
commit 1f2fb9a020
1 changed files with 3 additions and 0 deletions
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3
lib/CodeGen/SplitKit.cpp
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@ -913,6 +913,9 @@ void SplitEditor::computeRemainder() {
for (LiveInterval::const_vni_iterator I = parent.vni_begin(),
E = parent.vni_end(); I != E; ++I) {
const VNInfo *VNI = *I;
// Don't transfer unused values to the new intervals.
if (VNI->isUnused())
continue;
// Original def is contained in the split intervals.
if (intervalsLiveAt(VNI->def)) {
// Did this value escape?