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Enable assertion to detect cyclic valno references.

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This changes the stack overflow in PR6363 to an assertion failure.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96744 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen 2010-02-21 18:51:48 +00:00
parent 455080ff10
commit b1ce7b1324
1 changed files with 1 additions and 1 deletions
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lib/CodeGen/SimpleRegisterCoalescing.cpp
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@ -1864,7 +1864,7 @@ static unsigned ComputeUltimateVN(VNInfo *VNI,
// If the VN has already been computed, just return it.
if (ThisValNoAssignments[VN] >= 0)
return ThisValNoAssignments[VN];
// assert(ThisValNoAssignments[VN] != -2 && "Cyclic case?");
assert(ThisValNoAssignments[VN] != -2 && "Cyclic value numbers");
// If this val is not a copy from the other val, then it must be a new value
// number in the destination.