Fix SingleSource/Benchmarks/McGill/chomp

llvm-svn: 16912
2004-10-11 04:07:27 +00:00 · 2004-10-11 04:07:27 +00:00 · 6faf3949f6
parent b2b7f90caf
commit 6faf3949f6
1 changed files with 1 additions and 0 deletions
--- a/llvm/lib/Analysis/ScalarEvolution.cpp
+++ b/llvm/lib/Analysis/ScalarEvolution.cpp
@ -1898,6 +1898,7 @@ SCEVHandle ScalarEvolutionsImpl::HowFarToZero(SCEV *V, const Loop *L) {
    //
    // Get the initial value for the loop.
    SCEVHandle Start = getSCEVAtScope(AddRec->getStart(), L->getParentLoop());
+    if (isa<SCEVCouldNotCompute>(Start)) return UnknownValue;
    SCEVHandle Step = AddRec->getOperand(1);

    Step = getSCEVAtScope(Step, L->getParentLoop());