return m_FSub(m_NegZeroFP(), X);
}
+/// Match 'fneg X' as 'fsub +-0.0, X'.
+template <typename RHS>
+inline BinaryOp_match<cstfp_pred_ty<is_any_zero_fp>, RHS, Instruction::FSub>
+m_FNegNSZ(const RHS &X) {
+ return m_FSub(m_AnyZeroFP(), X);
+}
+
template <typename LHS, typename RHS>
inline BinaryOp_match<LHS, RHS, Instruction::Mul> m_Mul(const LHS &L,
const RHS &R) {
// -X / X -> -1.0 and
// X / -X -> -1.0 are legal when NaNs are ignored.
// We can ignore signed zeros because +-0.0/+-0.0 is NaN and ignored.
- if ((BinaryOperator::isFNeg(Op0, /*IgnoreZeroSign=*/true) &&
- BinaryOperator::getFNegArgument(Op0) == Op1) ||
- (BinaryOperator::isFNeg(Op1, /*IgnoreZeroSign=*/true) &&
- BinaryOperator::getFNegArgument(Op1) == Op0))
+ if (match(Op0, m_FNegNSZ(m_Specific(Op1))) ||
+ match(Op1, m_FNegNSZ(m_Specific(Op0))))
return ConstantFP::get(Op0->getType(), -1.0);
}
define <2 x float> @fdiv_neg_vec_undef_elt(<2 x float> %f) {
; CHECK-LABEL: @fdiv_neg_vec_undef_elt(
-; CHECK-NEXT: [[NEG:%.*]] = fsub <2 x float> <float 0.000000e+00, float undef>, [[F:%.*]]
-; CHECK-NEXT: [[DIV:%.*]] = fdiv nnan <2 x float> [[F]], [[NEG]]
-; CHECK-NEXT: ret <2 x float> [[DIV]]
+; CHECK-NEXT: ret <2 x float> <float -1.000000e+00, float -1.000000e+00>
;
%neg = fsub <2 x float> <float 0.0, float undef>, %f
%div = fdiv nnan <2 x float> %f, %neg