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| author | Evan Cheng <evan.cheng@apple.com> | 2008-05-20 08:10:37 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2008-05-20 08:10:37 +0000 |
| commit | c8b028daa462e51703815def156e2a3219aa41be (patch) | |
| tree | 6f0ee14d0256b460b36b26139dbae2565d65fbc5 /llvm/lib/CodeGen/LiveIntervalAnalysis.cpp | |
| parent | 4b0e2a30e0fe55d55d3c0255fa79c14be3138722 (diff) | |
| download | bcm5719-llvm-c8b028daa462e51703815def156e2a3219aa41be.tar.gz bcm5719-llvm-c8b028daa462e51703815def156e2a3219aa41be.zip | |
Don't spill dead def.
llvm-svn: 51305
Diffstat (limited to 'llvm/lib/CodeGen/LiveIntervalAnalysis.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/LiveIntervalAnalysis.cpp | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/llvm/lib/CodeGen/LiveIntervalAnalysis.cpp b/llvm/lib/CodeGen/LiveIntervalAnalysis.cpp index 8b25344b477..2558b09ad60 100644 --- a/llvm/lib/CodeGen/LiveIntervalAnalysis.cpp +++ b/llvm/lib/CodeGen/LiveIntervalAnalysis.cpp @@ -1562,7 +1562,9 @@ addIntervalsForSpills(const LiveInterval &li, if (!Folded) { LiveRange *LR = &nI.ranges[nI.ranges.size()-1]; bool isKill = LR->end == getStoreIndex(index); - vrm.addSpillPoint(VReg, isKill, MI); + if (!MI->registerDefIsDead(nI.reg)) + // No need to spill a dead def. + vrm.addSpillPoint(VReg, isKill, MI); if (isKill) AddedKill.insert(&nI); } |
