(re)fix handling of UGT. Pointed out by Nick Lewycky.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49991 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Analysis/ScalarEvolution.cpp b/lib/Analysis/ScalarEvolution.cpp
index 32e9e96a6d8acc275590f791631ae8b973a94764..0a58f2b629d0d8253479ed8c007b323843fefddb 100644 (file)
--- a/lib/Analysis/ScalarEvolution.cpp
+++ b/lib/Analysis/ScalarEvolution.cpp
@@ -1980,7 +1980,8 @@ SCEVHandle ScalarEvolutionsImpl::ComputeIterationCount(const Loop *L) {
     break;
   }
   case ICmpInst::ICMP_UGT: {
-    SCEVHandle TC = HowFarToZero(SE.getMinusSCEV(LHS, RHS), L);
+    SCEVHandle TC = HowManyLessThans(SE.getNotSCEV(LHS),
+                  SE.getNotSCEV(RHS), L, false);
     if (!isa<SCEVCouldNotCompute>(TC)) return TC;
     break;
   }