if (ConstantInt *RHS = dyn_cast<ConstantInt>(Op1)) {
- // xor (icmp A, B), true = not (icmp A, B) = !icmp A, B
- if (ICmpInst *ICI = dyn_cast<ICmpInst>(Op0))
- if (RHS == ConstantInt::getTrue() && ICI->hasOneUse())
+ // xor (cmp A, B), true = not (cmp A, B) = !cmp A, B
+ if (RHS == ConstantInt::getTrue() && Op0->hasOneUse()) {
+ if (ICmpInst *ICI = dyn_cast<ICmpInst>(Op0))
return new ICmpInst(ICI->getInversePredicate(),
ICI->getOperand(0), ICI->getOperand(1));
+ if (FCmpInst *FCI = dyn_cast<FCmpInst>(Op0))
+ return new FCmpInst(FCI->getInversePredicate(),
+ FCI->getOperand(0), FCI->getOperand(1));
+ }
+
if (BinaryOperator *Op0I = dyn_cast<BinaryOperator>(Op0)) {
// ~(c-X) == X-c-1 == X+(-c-1)
if (Op0I->getOpcode() == Instruction::Sub && RHS->isAllOnesValue())
--- /dev/null
+; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep "fcmp uge"
+; PR1570
+
+define i1 @f(float %X, float %Y) {
+entry:
+ %tmp3 = fcmp olt float %X, %Y ; <i1> [#uses=1]
+ %toBoolnot5 = xor i1 %tmp3, true ; <i1> [#uses=1]
+ ret i1 %toBoolnot5
+}
+