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| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2011-01-20 06:20:02 +0000 |
|---|---|---|
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2011-01-20 06:20:02 +0000 |
| commit | fd50d76ff854e8e60aa22b0db609de359ff3a576 (patch) | |
| tree | 8e1d386f397a8139925f2afe4ac7a4644179ca61 /lib/CodeGen/SimpleRegisterCoalescing.cpp | |
| parent | b908a009cf3d85586c6ca25d1de035b7d2b030b5 (diff) | |
Check that a live range exists before shortening it. This fixes PR8989.
The live range may have been deleted earlier because of rematerialization.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123891 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/SimpleRegisterCoalescing.cpp')
| -rw-r--r-- | lib/CodeGen/SimpleRegisterCoalescing.cpp | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/lib/CodeGen/SimpleRegisterCoalescing.cpp b/lib/CodeGen/SimpleRegisterCoalescing.cpp index e616d3536f..a859f6e074 100644 --- a/lib/CodeGen/SimpleRegisterCoalescing.cpp +++ b/lib/CodeGen/SimpleRegisterCoalescing.cpp @@ -1685,9 +1685,11 @@ bool SimpleRegisterCoalescing::runOnMachineFunction(MachineFunction &fn) { DoDelete = false; if (MI->allDefsAreDead()) { - LiveInterval &li = li_->getInterval(SrcReg); - if (!ShortenDeadCopySrcLiveRange(li, MI)) - ShortenDeadCopyLiveRange(li, MI); + if (li_->hasInterval(SrcReg)) { + LiveInterval &li = li_->getInterval(SrcReg); + if (!ShortenDeadCopySrcLiveRange(li, MI)) + ShortenDeadCopyLiveRange(li, MI); + } DoDelete = true; } if (!DoDelete) { |