RHSCIOp = CI->getOperand(0);
if (RHSCIOp->getType() != LHSCIOp->getType())
return 0;
- else
- // Okay, just insert a compare of the reduced operands now!
- return new ICmpInst(ICI.getPredicate(), LHSCIOp, RHSCIOp);
+
+ // If the signedness of the two compares doesn't agree (i.e. one is a sext
+ // and the other is a zext), then we can't handle this.
+ if (CI->getOpcode() != LHSCI->getOpcode())
+ return 0;
+
+ // Likewise, if the signedness of the [sz]exts and the compare don't match,
+ // then we can't handle this.
+ if (isSignedExt != isSignedCmp && !ICI.isEquality())
+ return 0;
+
+ // Okay, just insert a compare of the reduced operands now!
+ return new ICmpInst(ICI.getPredicate(), LHSCIOp, RHSCIOp);
}
// If we aren't dealing with a constant on the RHS, exit early