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| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2010-06-28 19:39:57 +0000 |
|---|---|---|
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2010-06-28 19:39:57 +0000 |
| commit | 610bebf777de07ca68f016a63b548fbe22c2fd3c (patch) | |
| tree | 0a3a4bf85c9e5db077747a7d9dd1066e0a879bc1 | |
| parent | 0b9b85647ca27a85f0a41fe5e5a36389636de940 (diff) | |
After physreg coalescing, physical registers might not have live ranges where
you would expect.
Don't assert on that case, just give up.
This fixes PR7513.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107046 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/CodeGen/SimpleRegisterCoalescing.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/CodeGen/SimpleRegisterCoalescing.cpp b/lib/CodeGen/SimpleRegisterCoalescing.cpp index b068f316b6..5f4ef5b3b1 100644 --- a/lib/CodeGen/SimpleRegisterCoalescing.cpp +++ b/lib/CodeGen/SimpleRegisterCoalescing.cpp @@ -122,7 +122,8 @@ bool SimpleRegisterCoalescing::AdjustCopiesBackFrom(const CoalescerPair &CP, // AValNo is the value number in A that defines the copy, A3 in the example. SlotIndex CopyUseIdx = CopyIdx.getUseIndex(); LiveInterval::iterator ALR = IntA.FindLiveRangeContaining(CopyUseIdx); - assert(ALR != IntA.end() && "Live range not found!"); + // The live range might not exist after fun with physreg coalescing. + if (ALR == IntA.end()) return false; VNInfo *AValNo = ALR->valno; // If it's re-defined by an early clobber somewhere in the live range, then // it's not safe to eliminate the copy. FIXME: This is a temporary workaround. |