Fix a scalar evolution bug. Reversing everything
does not work because of 0; 2>0 but -2U is also >0.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49928 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/ScalarEvolution.cpp b/lib/Analysis/ScalarEvolution.cpp
index 4b4b97e..0508bb7 100644
--- a/lib/Analysis/ScalarEvolution.cpp
+++ b/lib/Analysis/ScalarEvolution.cpp
@@ -1980,8 +1980,7 @@
break;
}
case ICmpInst::ICMP_UGT: {
- SCEVHandle TC = HowManyLessThans(SE.getNegativeSCEV(LHS),
- SE.getNegativeSCEV(RHS), L, false);
+ SCEVHandle TC = HowFarToZero(SE.getMinusSCEV(LHS, RHS), L);
if (!isa<SCEVCouldNotCompute>(TC)) return TC;
break;
}