Temporarily reverting 46959.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47542 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Analysis/ScalarEvolution.cpp b/lib/Analysis/ScalarEvolution.cpp
index 876ebd4..0db02d9 100644 (file)
--- a/lib/Analysis/ScalarEvolution.cpp
+++ b/lib/Analysis/ScalarEvolution.cpp
@@ -1919,8 +1919,8 @@ SCEVHandle ScalarEvolutionsImpl::ComputeIterationCount(const Loop *L) {
 
   // At this point, we would like to compute how many iterations of the 
   // loop the predicate will return true for these inputs.
-  if (LHS->isLoopInvariant(L) && !RHS->isLoopInvariant(L)) {
-    // If there is a loop-invariant, force it into the RHS.
+  if (isa<SCEVConstant>(LHS) && !isa<SCEVConstant>(RHS)) {
+    // If there is a constant, force it into the RHS.
     std::swap(LHS, RHS);
     Cond = ICmpInst::getSwappedPredicate(Cond);
   }

diff --git a/test/Analysis/ScalarEvolution/2008-02-11-ReversedCondition.ll b/test/Analysis/ScalarEvolution/2008-02-11-ReversedCondition.ll
index e191b35..3f88b01 100644 (file)
--- a/test/Analysis/ScalarEvolution/2008-02-11-ReversedCondition.ll
+++ b/test/Analysis/ScalarEvolution/2008-02-11-ReversedCondition.ll
@@ -1,4 +1,5 @@
 ; RUN: llvm-as < %s | opt -scalar-evolution -analyze | grep {Loop header: ( 0 smax  %n) iterations!}
+; XFAIL: *
 
 define void @foo(i32 %n) {
 entry: