do some computation with apints instead of ConstantInts.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59401 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/Scalar/InstructionCombining.cpp b/lib/Transforms/Scalar/InstructionCombining.cpp
index a8dcfa4..acea4bd 100644
--- a/lib/Transforms/Scalar/InstructionCombining.cpp
+++ b/lib/Transforms/Scalar/InstructionCombining.cpp
@@ -3590,16 +3590,15 @@
return 0;
// Ensure that the larger constant is on the RHS.
- ICmpInst::Predicate GT;
+ bool ShouldSwap;
if (ICmpInst::isSignedPredicate(LHSCC) ||
(ICmpInst::isEquality(LHSCC) &&
ICmpInst::isSignedPredicate(RHSCC)))
- GT = ICmpInst::ICMP_SGT;
+ ShouldSwap = LHSCst->getValue().sgt(RHSCst->getValue());
else
- GT = ICmpInst::ICMP_UGT;
-
- Constant *Cmp = ConstantExpr::getICmp(GT, LHSCst, RHSCst);
- if (cast<ConstantInt>(Cmp)->getZExtValue()) {
+ ShouldSwap = LHSCst->getValue().ugt(RHSCst->getValue());
+
+ if (ShouldSwap) {
std::swap(LHS, RHS);
std::swap(LHSCst, RHSCst);
std::swap(LHSCC, RHSCC);