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| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2011-03-03 05:18:19 +0000 |
|---|---|---|
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2011-03-03 05:18:19 +0000 |
| commit | a97ff8a027259b1b9e4dbdb5b6f01cc2195a6948 (patch) | |
| tree | f4daea01d38e23fa6b8996bcf546bc05365cc204 /lib/CodeGen/SimpleRegisterCoalescing.cpp | |
| parent | acf9f48c5e5fa2ce381d566aefc6285653ab2b5c (diff) | |
Avoid comparing invalid slot indexes, and assert that it doesn't happen.
The SlotIndex created by the default construction does not represent a position
in the function, and it doesn't make sense to compare it to other indexes.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126924 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/SimpleRegisterCoalescing.cpp')
| -rw-r--r-- | lib/CodeGen/SimpleRegisterCoalescing.cpp | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/lib/CodeGen/SimpleRegisterCoalescing.cpp b/lib/CodeGen/SimpleRegisterCoalescing.cpp index 2843c1a5b6..74898c210a 100644 --- a/lib/CodeGen/SimpleRegisterCoalescing.cpp +++ b/lib/CodeGen/SimpleRegisterCoalescing.cpp @@ -1568,9 +1568,7 @@ SimpleRegisterCoalescing::lastRegisterUse(SlotIndex Start, if (UseMI->isIdentityCopy()) continue; SlotIndex Idx = li_->getInstructionIndex(UseMI); - // FIXME: Should this be Idx != UseIdx? SlotIndex() will return something - // that compares higher than any other interval. - if (Idx >= Start && Idx < End && Idx >= UseIdx) { + if (Idx >= Start && Idx < End && (!UseIdx.isValid() || Idx >= UseIdx)) { LastUse = &Use; UseIdx = Idx.getUseIndex(); } |