Fix test/Transforms/InstCombine/2007-01-27-AndICmp.ll, a miscompilation of

Mozilla that Anton tracked down.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33591 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Transforms/Scalar/InstructionCombining.cpp b/lib/Transforms/Scalar/InstructionCombining.cpp
index d38c7c46c2cecbdd91886c11e5a495a87cdb55fe..12a886aebe51a9f313f3e16c41707d72992a0484 100644 (file)
--- a/lib/Transforms/Scalar/InstructionCombining.cpp
+++ b/lib/Transforms/Scalar/InstructionCombining.cpp
@@ -3288,7 +3288,8 @@ Instruction *InstCombiner::visitAnd(BinaryOperator &I) {
                 Instruction *Add = BinaryOperator::createAdd(LHSVal, AddCST,
                                                       LHSVal->getName()+".off");
                 InsertNewInstBefore(Add, I);
-                return new ICmpInst(ICmpInst::ICMP_UGT, Add, AddCST);
+                return new ICmpInst(ICmpInst::ICMP_UGT, Add,
+                                    ConstantInt::get(Add->getType(), 1));
               }
               break;                        // (X != 13 & X != 15) -> no change
             }