; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -passes=instsimplify -S | FileCheck %s

; fneg (fsub -0.0, X) ==> X
define float @fsub_-0_x(float %a) #0 {
; CHECK-LABEL: @fsub_-0_x(
; CHECK-NEXT:    [[T1:%.*]] = call float @llvm.experimental.constrained.fsub.f32(float -0.000000e+00, float [[A:%.*]], metadata !"round.tonearest", metadata !"fpexcept.ignore")
; CHECK-NEXT:    [[RET:%.*]] = fneg float [[T1]]
; CHECK-NEXT:    ret float [[RET]]
;
  %t1 = call float @llvm.experimental.constrained.fsub.f32(float -0.0, float %a, metadata !"round.tonearest", metadata !"fpexcept.ignore")
  %ret = fneg float %t1
  ret float %ret
}

define <2 x float> @fsub_-0_x_vec(<2 x float> %a) #0 {
; CHECK-LABEL: @fsub_-0_x_vec(
; CHECK-NEXT:    [[T1:%.*]] = call <2 x float> @llvm.experimental.constrained.fsub.v2f32(<2 x float> splat (float -0.000000e+00), <2 x float> [[A:%.*]], metadata !"round.tonearest", metadata !"fpexcept.ignore")
; CHECK-NEXT:    [[RET:%.*]] = fneg <2 x float> [[T1]]
; CHECK-NEXT:    ret <2 x float> [[RET]]
;
  %t1 = call <2 x float> @llvm.experimental.constrained.fsub.v2f32(<2 x float><float -0.0, float -0.0>, <2 x float> %a, metadata !"round.tonearest", metadata !"fpexcept.ignore")
  %ret = fneg <2 x float> %t1
  ret <2 x float> %ret
}

define <2 x float> @fsub_-0_x_vec_poison_elts(<2 x float> %a) #0 {
; CHECK-LABEL: @fsub_-0_x_vec_poison_elts(
; CHECK-NEXT:    [[T1:%.*]] = call <2 x float> @llvm.experimental.constrained.fsub.v2f32(<2 x float> <float -0.000000e+00, float poison>, <2 x float> [[A:%.*]], metadata !"round.tonearest", metadata !"fpexcept.ignore")
; CHECK-NEXT:    [[RET:%.*]] = fneg <2 x float> [[T1]]
; CHECK-NEXT:    ret <2 x float> [[RET]]
;
  %t1 = call <2 x float> @llvm.experimental.constrained.fsub.v2f32(<2 x float><float -0.0, float poison>, <2 x float> %a, metadata !"round.tonearest", metadata !"fpexcept.ignore")
  %ret = fneg <2 x float> %t1
  ret <2 x float> %ret
}

define <2 x float> @fsub_negzero_vec_poison_elts(<2 x float> %x) #0 {
; CHECK-LABEL: @fsub_negzero_vec_poison_elts(
; CHECK-NEXT:    [[R:%.*]] = call nsz <2 x float> @llvm.experimental.constrained.fsub.v2f32(<2 x float> <float poison, float -0.000000e+00>, <2 x float> [[X:%.*]], metadata !"round.tonearest", metadata !"fpexcept.ignore")
; CHECK-NEXT:    ret <2 x float> [[R]]
;
  %r = call nsz <2 x float> @llvm.experimental.constrained.fsub.v2f32(<2 x float><float poison, float -0.0>, <2 x float> %x, metadata !"round.tonearest", metadata !"fpexcept.ignore")
  ret <2 x float> %r
}

; fsub -0.0, (fsub -0.0, X) ==> X
define float @fsub_-0_-0_x(float %a) #0 {
; CHECK-LABEL: @fsub_-0_-0_x(
; CHECK-NEXT:    [[T1:%.*]] = call float @llvm.experimental.constrained.fsub.f32(float -0.000000e+00, float [[A:%.*]], metadata !"round.tonearest", metadata !"fpexcept.ignore")
; CHECK-NEXT:    [[RET:%.*]] = call float @llvm.experimental.constrained.fsub.f32(float -0.000000e+00, float [[T1]], metadata !"round.tonearest", metadata !"fpexcept.ignore")
; CHECK-NEXT:    ret float [[RET]]
;
  %t1 = call float @llvm.experimental.constrained.fsub.f32(float -0.0, float %a, metadata !"round.tonearest", metadata !"fpexcept.ignore")
  %ret = call float @llvm.experimental.constrained.fsub.f32(float -0.0, float %t1, metadata !"round.tonearest", metadata !"fpexcept.ignore")
  ret float %ret
}

; fsub -0.0, (fneg X) ==> X
define float @fneg_x(float %a) #0 {
; CHECK-LABEL: @fneg_x(
; CHECK-NEXT:    ret float [[A:%.*]]
;
  %t1 = fneg float %a
  %ret = call float @llvm.experimental.constrained.fsub.f32(float -0.0, float %t1, metadata !"round.tonearest", metadata !"fpexcept.ignore")
  ret float %ret
}

define <2 x float> @fsub_-0_-0_x_vec(<2 x float> %a) #0 {
; CHECK-LABEL: @fsub_-0_-0_x_vec(
; CHECK-NEXT:    [[T1:%.*]] = call <2 x float> @llvm.experimental.constrained.fsub.v2f32(<2 x float> splat (float -0.000000e+00), <2 x float> [[A:%.*]], metadata !"round.tonearest", metadata !"fpexcept.ignore")
; CHECK-NEXT:    [[RET:%.*]] = call <2 x float> @llvm.experimental.constrained.fsub.v2f32(<2 x float> splat (float -0.000000e+00), <2 x float> [[T1]], metadata !"round.tonearest", metadata !"fpexcept.ignore")
; CHECK-NEXT:    ret <2 x float> [[RET]]
;
  %t1 = call <2 x float> @llvm.experimental.constrained.fsub.v2f32(<2 x float><float -0.0, float -0.0>, <2 x float> %a, metadata !"round.tonearest", metadata !"fpexcept.ignore")
  %ret = call <2 x float> @llvm.experimental.constrained.fsub.v2f32(<2 x float><float -0.0, float -0.0>, <2 x float> %t1, metadata !"round.tonearest", metadata !"fpexcept.ignore")
  ret <2 x float> %ret
}

define <2 x float> @fneg_x_vec(<2 x float> %a) #0 {
; CHECK-LABEL: @fneg_x_vec(
; CHECK-NEXT:    ret <2 x float> [[A:%.*]]
;
  %t1 = fneg <2 x float> %a
  %ret = call <2 x float> @llvm.experimental.constrained.fsub.v2f32(<2 x float><float -0.0, float -0.0>, <2 x float> %t1, metadata !"round.tonearest", metadata !"fpexcept.ignore")
  ret <2 x float> %ret
}

define <2 x float> @fsub_-0_-0_x_vec_poison_elts(<2 x float> %a) #0 {
; CHECK-LABEL: @fsub_-0_-0_x_vec_poison_elts(
; CHECK-NEXT:    [[T1:%.*]] = call <2 x float> @llvm.experimental.constrained.fsub.v2f32(<2 x float> <float poison, float -0.000000e+00>, <2 x float> [[A:%.*]], metadata !"round.tonearest", metadata !"fpexcept.ignore")
; CHECK-NEXT:    [[RET:%.*]] = call <2 x float> @llvm.experimental.constrained.fsub.v2f32(<2 x float> <float -0.000000e+00, float poison>, <2 x float> [[T1]], metadata !"round.tonearest", metadata !"fpexcept.ignore")
; CHECK-NEXT:    ret <2 x float> [[RET]]
;
  %t1 = call <2 x float> @llvm.experimental.constrained.fsub.v2f32(<2 x float><float poison, float -0.0>, <2 x float> %a, metadata !"round.tonearest", metadata !"fpexcept.ignore")
  %ret = call <2 x float> @llvm.experimental.constrained.fsub.v2f32(<2 x float><float -0.0, float poison>, <2 x float> %t1, metadata !"round.tonearest", metadata !"fpexcept.ignore")
  ret <2 x float> %ret
}

define <2 x float> @fneg_x_vec_poison_elts(<2 x float> %a) #0 {
; CHECK-LABEL: @fneg_x_vec_poison_elts(
; CHECK-NEXT:    ret <2 x float> [[A:%.*]]
;
  %t1 = fneg <2 x float> %a
  %ret = call <2 x float> @llvm.experimental.constrained.fsub.v2f32(<2 x float><float -0.0, float poison>, <2 x float> %t1, metadata !"round.tonearest", metadata !"fpexcept.ignore")
  ret <2 x float> %ret
}

; fsub -0.0, (fsub 0.0, X) != X
define float @fsub_-0_0_x(float %a) #0 {
; CHECK-LABEL: @fsub_-0_0_x(
; CHECK-NEXT:    [[T1:%.*]] = call float @llvm.experimental.constrained.fsub.f32(float 0.000000e+00, float [[A:%.*]], metadata !"round.tonearest", metadata !"fpexcept.ignore")
; CHECK-NEXT:    [[RET:%.*]] = call float @llvm.experimental.constrained.fsub.f32(float -0.000000e+00, float [[T1]], metadata !"round.tonearest", metadata !"fpexcept.ignore")
; CHECK-NEXT:    ret float [[RET]]
;
  %t1 = call float @llvm.experimental.constrained.fsub.f32(float 0.0, float %a, metadata !"round.tonearest", metadata !"fpexcept.ignore")
  %ret = call float @llvm.experimental.constrained.fsub.f32(float -0.0, float %t1, metadata !"round.tonearest", metadata !"fpexcept.ignore")
  ret float %ret
}

; fsub 0.0, (fsub -0.0, X) != X
define float @fsub_0_-0_x(float %a) #0 {
; CHECK-LABEL: @fsub_0_-0_x(
; CHECK-NEXT:    [[T1:%.*]] = call float @llvm.experimental.constrained.fsub.f32(float -0.000000e+00, float [[A:%.*]], metadata !"round.tonearest", metadata !"fpexcept.ignore")
; CHECK-NEXT:    [[RET:%.*]] = call float @llvm.experimental.constrained.fsub.f32(float 0.000000e+00, float [[T1]], metadata !"round.tonearest", metadata !"fpexcept.ignore")
; CHECK-NEXT:    ret float [[RET]]
;
  %t1 = call float @llvm.experimental.constrained.fsub.f32(float -0.0, float %a, metadata !"round.tonearest", metadata !"fpexcept.ignore")
  %ret = call float @llvm.experimental.constrained.fsub.f32(float 0.0, float %t1, metadata !"round.tonearest", metadata !"fpexcept.ignore")
  ret float %ret
}

; fsub X, 0 ==> X
define float @fsub_x_0(float %x) #0 {
; CHECK-LABEL: @fsub_x_0(
; CHECK-NEXT:    ret float [[X:%.*]]
;
  %r = call float @llvm.experimental.constrained.fsub.f32(float %x, float 0.0, metadata !"round.tonearest", metadata !"fpexcept.ignore")
  ret float %r
}

define <2 x float> @fsub_x_0_vec_poison(<2 x float> %x) #0 {
; CHECK-LABEL: @fsub_x_0_vec_poison(
; CHECK-NEXT:    ret <2 x float> [[X:%.*]]
;
  %r = call <2 x float> @llvm.experimental.constrained.fsub.v2f32(<2 x float> %x, <2 x float><float poison, float 0.0>, metadata !"round.tonearest", metadata !"fpexcept.ignore")
  ret <2 x float> %r
}

; fadd X, -0 ==> X
define float @fadd_x_n0(float %a) #0 {
; CHECK-LABEL: @fadd_x_n0(
; CHECK-NEXT:    ret float [[A:%.*]]
;
  %ret = call float @llvm.experimental.constrained.fadd.f32(float %a, float -0.0, metadata !"round.tonearest", metadata !"fpexcept.ignore")
  ret float %ret
}

define <2 x float> @fadd_x_n0_vec_poison_elt(<2 x float> %a) #0 {
; CHECK-LABEL: @fadd_x_n0_vec_poison_elt(
; CHECK-NEXT:    ret <2 x float> [[A:%.*]]
;
  %ret = call <2 x float> @llvm.experimental.constrained.fadd.v2f32(<2 x float> %a, <2 x float> <float -0.0, float poison>, metadata !"round.tonearest", metadata !"fpexcept.ignore")
  ret <2 x float> %ret
}

; fadd X, 0 ==> X
define float @fadd_x_p0(float %a) #0 {
; CHECK-LABEL: @fadd_x_p0(
; CHECK-NEXT:    [[RET:%.*]] = call float @llvm.experimental.constrained.fadd.f32(float [[A:%.*]], float 0.000000e+00, metadata !"round.tonearest", metadata !"fpexcept.ignore")
; CHECK-NEXT:    ret float [[RET]]
;
  %ret = call float @llvm.experimental.constrained.fadd.f32(float %a, float 0.0, metadata !"round.tonearest", metadata !"fpexcept.ignore")
  ret float %ret
}

define <2 x float> @fadd_x_p0_vec_poison_elt(<2 x float> %a) #0 {
; CHECK-LABEL: @fadd_x_p0_vec_poison_elt(
; CHECK-NEXT:    [[RET:%.*]] = call <2 x float> @llvm.experimental.constrained.fadd.v2f32(<2 x float> [[A:%.*]], <2 x float> <float 0.000000e+00, float poison>, metadata !"round.tonearest", metadata !"fpexcept.ignore")
; CHECK-NEXT:    ret <2 x float> [[RET]]
;
  %ret = call <2 x float> @llvm.experimental.constrained.fadd.v2f32(<2 x float> %a, <2 x float> <float 0.0, float poison>, metadata !"round.tonearest", metadata !"fpexcept.ignore")
  ret <2 x float> %ret
}

; fmul X, 1.0 ==> X
define double @fmul_X_1(double %a) #0 {
; CHECK-LABEL: @fmul_X_1(
; CHECK-NEXT:    ret double [[A:%.*]]
;
  %b = call double @llvm.experimental.constrained.fmul.f64(double 1.0, double %a, metadata !"round.tonearest", metadata !"fpexcept.ignore")
  ret double %b
}

; Originally PR2642
define <4 x float> @fmul_X_1_vec(<4 x float> %x) #0 {
; CHECK-LABEL: @fmul_X_1_vec(
; CHECK-NEXT:    ret <4 x float> [[X:%.*]]
;
  %m = call <4 x float> @llvm.experimental.constrained.fmul.v4f32(<4 x float> %x, <4 x float> <float 1.0, float 1.0, float 1.0, float 1.0>, metadata !"round.tonearest", metadata !"fpexcept.ignore")
  ret <4 x float> %m
}

; fdiv X, 1.0 ==> X
define float @fdiv_x_1(float %a) #0 {
; CHECK-LABEL: @fdiv_x_1(
; CHECK-NEXT:    ret float [[A:%.*]]
;
  %ret = call float @llvm.experimental.constrained.fdiv.f32(float %a, float 1.0, metadata !"round.tonearest", metadata !"fpexcept.ignore")

  ret float %ret
}


; The fabs can't be eliminated because llvm.experimental.constrained.sqrt.f32 may return -0 or NaN with
; an arbitrary sign bit.
define float @fabs_sqrt(float %a) #0 {
; CHECK-LABEL: @fabs_sqrt(
; CHECK-NEXT:    [[SQRT:%.*]] = call float @llvm.experimental.constrained.sqrt.f32(float [[A:%.*]], metadata !"round.tonearest", metadata !"fpexcept.ignore")
; CHECK-NEXT:    [[FABS:%.*]] = call float @llvm.fabs.f32(float [[SQRT]]) #[[ATTR0:[0-9]+]]
; CHECK-NEXT:    ret float [[FABS]]
;
  %sqrt = call float @llvm.experimental.constrained.sqrt.f32(float %a, metadata !"round.tonearest", metadata !"fpexcept.ignore")
  %fabs = call float @llvm.fabs.f32(float %sqrt) #0
  ret float %fabs
}

; The fabs can't be eliminated because the nnan sqrt may still return -0.
define float @fabs_sqrt_nnan(float %a) #0 {
; CHECK-LABEL: @fabs_sqrt_nnan(
; CHECK-NEXT:    [[SQRT:%.*]] = call nnan float @llvm.experimental.constrained.sqrt.f32(float [[A:%.*]], metadata !"round.tonearest", metadata !"fpexcept.ignore")
; CHECK-NEXT:    [[FABS:%.*]] = call float @llvm.fabs.f32(float [[SQRT]]) #[[ATTR0]]
; CHECK-NEXT:    ret float [[FABS]]
;
  %sqrt = call nnan float @llvm.experimental.constrained.sqrt.f32(float %a, metadata !"round.tonearest", metadata !"fpexcept.ignore")
  %fabs = call float @llvm.fabs.f32(float %sqrt) #0
  ret float %fabs
}

; The fabs can't be eliminated because the nsz sqrt may still return NaN.
define float @fabs_sqrt_nsz(float %a) #0 {
; CHECK-LABEL: @fabs_sqrt_nsz(
; CHECK-NEXT:    [[SQRT:%.*]] = call nsz float @llvm.experimental.constrained.sqrt.f32(float [[A:%.*]], metadata !"round.tonearest", metadata !"fpexcept.ignore")
; CHECK-NEXT:    [[FABS:%.*]] = call float @llvm.fabs.f32(float [[SQRT]]) #[[ATTR0]]
; CHECK-NEXT:    ret float [[FABS]]
;
  %sqrt = call nsz float @llvm.experimental.constrained.sqrt.f32(float %a, metadata !"round.tonearest", metadata !"fpexcept.ignore")
  %fabs = call float @llvm.fabs.f32(float %sqrt) #0
  ret float %fabs
}

define float @fabs_sqrt_nnan_nsz(float %a) #0 {
; CHECK-LABEL: @fabs_sqrt_nnan_nsz(
; CHECK-NEXT:    [[SQRT:%.*]] = call nnan nsz float @llvm.experimental.constrained.sqrt.f32(float [[A:%.*]], metadata !"round.tonearest", metadata !"fpexcept.ignore")
; CHECK-NEXT:    ret float [[SQRT]]
;
  %sqrt = call nnan nsz float @llvm.experimental.constrained.sqrt.f32(float %a, metadata !"round.tonearest", metadata !"fpexcept.ignore")
  %fabs = call float @llvm.fabs.f32(float %sqrt) #0
  ret float %fabs
}

define float @fabs_sqrt_nnan_fabs(float %a) #0 {
; CHECK-LABEL: @fabs_sqrt_nnan_fabs(
; CHECK-NEXT:    [[B:%.*]] = call float @llvm.fabs.f32(float [[A:%.*]]) #[[ATTR0]]
; CHECK-NEXT:    [[SQRT:%.*]] = call nnan float @llvm.experimental.constrained.sqrt.f32(float [[B]], metadata !"round.tonearest", metadata !"fpexcept.ignore")
; CHECK-NEXT:    ret float [[SQRT]]
;
  %b = call float @llvm.fabs.f32(float %a) #0
  %sqrt = call nnan float @llvm.experimental.constrained.sqrt.f32(float %b, metadata !"round.tonearest", metadata !"fpexcept.ignore")
  %fabs = call float @llvm.fabs.f32(float %sqrt) #0
  ret float %fabs
}

; Y - (Y - X) --> X

define float @fsub_fsub_common_op(float %x, float %y) #0 {
; CHECK-LABEL: @fsub_fsub_common_op(
; CHECK-NEXT:    [[S:%.*]] = call float @llvm.experimental.constrained.fsub.f32(float [[Y:%.*]], float [[X:%.*]], metadata !"round.tonearest", metadata !"fpexcept.ignore")
; CHECK-NEXT:    [[R:%.*]] = call reassoc nsz float @llvm.experimental.constrained.fsub.f32(float [[Y]], float [[S]], metadata !"round.tonearest", metadata !"fpexcept.ignore")
; CHECK-NEXT:    ret float [[R]]
;
  %s = call float @llvm.experimental.constrained.fsub.f32(float %y, float %x, metadata !"round.tonearest", metadata !"fpexcept.ignore")
  %r = call reassoc nsz float @llvm.experimental.constrained.fsub.f32(float %y, float %s, metadata !"round.tonearest", metadata !"fpexcept.ignore")
  ret float %r
}

define <2 x float> @fsub_fsub_common_op_vec(<2 x float> %x, <2 x float> %y) #0 {
; CHECK-LABEL: @fsub_fsub_common_op_vec(
; CHECK-NEXT:    [[S:%.*]] = call <2 x float> @llvm.experimental.constrained.fsub.v2f32(<2 x float> [[Y:%.*]], <2 x float> [[X:%.*]], metadata !"round.tonearest", metadata !"fpexcept.ignore")
; CHECK-NEXT:    [[R:%.*]] = call reassoc nsz <2 x float> @llvm.experimental.constrained.fsub.v2f32(<2 x float> [[Y]], <2 x float> [[S]], metadata !"round.tonearest", metadata !"fpexcept.ignore")
; CHECK-NEXT:    ret <2 x float> [[R]]
;
  %s = call <2 x float> @llvm.experimental.constrained.fsub.v2f32(<2 x float> %y, <2 x float> %x, metadata !"round.tonearest", metadata !"fpexcept.ignore")
  %r = call reassoc nsz <2 x float> @llvm.experimental.constrained.fsub.v2f32(<2 x float> %y, <2 x float> %s, metadata !"round.tonearest", metadata !"fpexcept.ignore")
  ret <2 x float> %r
}

; Negative test - fsub is not commutative.
; Y - (X - Y) --> (Y - X) + Y (canonicalized)

define float @fsub_fsub_wrong_common_op(float %x, float %y) #0 {
; CHECK-LABEL: @fsub_fsub_wrong_common_op(
; CHECK-NEXT:    [[S:%.*]] = call float @llvm.experimental.constrained.fsub.f32(float [[X:%.*]], float [[Y:%.*]], metadata !"round.tonearest", metadata !"fpexcept.ignore")
; CHECK-NEXT:    [[R:%.*]] = call reassoc nsz float @llvm.experimental.constrained.fsub.f32(float [[Y]], float [[S]], metadata !"round.tonearest", metadata !"fpexcept.ignore")
; CHECK-NEXT:    ret float [[R]]
;
  %s = call float @llvm.experimental.constrained.fsub.f32(float %x, float %y, metadata !"round.tonearest", metadata !"fpexcept.ignore")
  %r = call reassoc nsz float @llvm.experimental.constrained.fsub.f32(float %y, float %s, metadata !"round.tonearest", metadata !"fpexcept.ignore")
  ret float %r
}

; Negative test - negated operand needed.
; (Y - X) - Y --> -X

define float @fsub_fsub_common_op_wrong_commute(float %x, float %y) #0 {
; CHECK-LABEL: @fsub_fsub_common_op_wrong_commute(
; CHECK-NEXT:    [[S:%.*]] = call float @llvm.experimental.constrained.fsub.f32(float [[Y:%.*]], float [[X:%.*]], metadata !"round.tonearest", metadata !"fpexcept.ignore")
; CHECK-NEXT:    [[R:%.*]] = call reassoc nsz float @llvm.experimental.constrained.fsub.f32(float [[S]], float [[Y]], metadata !"round.tonearest", metadata !"fpexcept.ignore")
; CHECK-NEXT:    ret float [[R]]
;
  %s = call float @llvm.experimental.constrained.fsub.f32(float %y, float %x, metadata !"round.tonearest", metadata !"fpexcept.ignore")
  %r = call reassoc nsz float @llvm.experimental.constrained.fsub.f32(float %s, float %y, metadata !"round.tonearest", metadata !"fpexcept.ignore")
  ret float %r
}

; Negative test - fsub is not commutative.
; (X - Y) - Y --> ?

define float @fsub_fsub_wrong_common_op_wrong_commute(float %x, float %y) #0 {
; CHECK-LABEL: @fsub_fsub_wrong_common_op_wrong_commute(
; CHECK-NEXT:    [[S:%.*]] = call float @llvm.experimental.constrained.fsub.f32(float [[X:%.*]], float [[Y:%.*]], metadata !"round.tonearest", metadata !"fpexcept.ignore")
; CHECK-NEXT:    [[R:%.*]] = call reassoc nsz float @llvm.experimental.constrained.fsub.f32(float [[S]], float [[Y]], metadata !"round.tonearest", metadata !"fpexcept.ignore")
; CHECK-NEXT:    ret float [[R]]
;
  %s = call float @llvm.experimental.constrained.fsub.f32(float %x, float %y, metadata !"round.tonearest", metadata !"fpexcept.ignore")
  %r = call reassoc nsz float @llvm.experimental.constrained.fsub.f32(float %s, float %y, metadata !"round.tonearest", metadata !"fpexcept.ignore")
  ret float %r
}

; (Y + X) - Y --> X

define float @fadd_fsub_common_op(float %x, float %y) #0 {
; CHECK-LABEL: @fadd_fsub_common_op(
; CHECK-NEXT:    [[A:%.*]] = call float @llvm.experimental.constrained.fadd.f32(float [[Y:%.*]], float [[X:%.*]], metadata !"round.tonearest", metadata !"fpexcept.ignore")
; CHECK-NEXT:    [[R:%.*]] = call reassoc nsz float @llvm.experimental.constrained.fsub.f32(float [[A]], float [[Y]], metadata !"round.tonearest", metadata !"fpexcept.ignore")
; CHECK-NEXT:    ret float [[R]]
;
  %a = call float @llvm.experimental.constrained.fadd.f32(float %y, float %x, metadata !"round.tonearest", metadata !"fpexcept.ignore")
  %r = call reassoc nsz float @llvm.experimental.constrained.fsub.f32(float %a, float %y, metadata !"round.tonearest", metadata !"fpexcept.ignore")
  ret float %r
}

; (X + Y) - Y --> X

define <2 x float> @fadd_fsub_common_op_commute_vec(<2 x float> %x, <2 x float> %y) #0 {
; CHECK-LABEL: @fadd_fsub_common_op_commute_vec(
; CHECK-NEXT:    [[A:%.*]] = call <2 x float> @llvm.experimental.constrained.fadd.v2f32(<2 x float> [[X:%.*]], <2 x float> [[Y:%.*]], metadata !"round.tonearest", metadata !"fpexcept.ignore")
; CHECK-NEXT:    [[R:%.*]] = call reassoc nsz <2 x float> @llvm.experimental.constrained.fsub.v2f32(<2 x float> [[A]], <2 x float> [[Y]], metadata !"round.tonearest", metadata !"fpexcept.ignore")
; CHECK-NEXT:    ret <2 x float> [[R]]
;
  %a = call <2 x float> @llvm.experimental.constrained.fadd.v2f32(<2 x float> %x, <2 x float> %y, metadata !"round.tonearest", metadata !"fpexcept.ignore")
  %r = call reassoc nsz <2 x float> @llvm.experimental.constrained.fsub.v2f32(<2 x float> %a, <2 x float> %y, metadata !"round.tonearest", metadata !"fpexcept.ignore")
  ret <2 x float> %r
}

; Negative test - negated operand needed.
; Y - (Y + X) --> -X

define float @fadd_fsub_common_op_wrong_commute(float %x, float %y) #0 {
; CHECK-LABEL: @fadd_fsub_common_op_wrong_commute(
; CHECK-NEXT:    [[A:%.*]] = call float @llvm.experimental.constrained.fadd.f32(float [[Y:%.*]], float [[X:%.*]], metadata !"round.tonearest", metadata !"fpexcept.ignore")
; CHECK-NEXT:    [[R:%.*]] = call reassoc nsz float @llvm.experimental.constrained.fsub.f32(float [[Y]], float [[A]], metadata !"round.tonearest", metadata !"fpexcept.ignore")
; CHECK-NEXT:    ret float [[R]]
;
  %a = call float @llvm.experimental.constrained.fadd.f32(float %y, float %x, metadata !"round.tonearest", metadata !"fpexcept.ignore")
  %r = call reassoc nsz float @llvm.experimental.constrained.fsub.f32(float %y, float %a, metadata !"round.tonearest", metadata !"fpexcept.ignore")
  ret float %r
}

; Negative test - negated operand needed.
; Y - (X + Y) --> -X

define float @fadd_fsub_common_op_wrong_commute_commute(float %x, float %y) #0 {
; CHECK-LABEL: @fadd_fsub_common_op_wrong_commute_commute(
; CHECK-NEXT:    [[A:%.*]] = call float @llvm.experimental.constrained.fadd.f32(float [[X:%.*]], float [[Y:%.*]], metadata !"round.tonearest", metadata !"fpexcept.ignore")
; CHECK-NEXT:    [[R:%.*]] = call reassoc nsz float @llvm.experimental.constrained.fsub.f32(float [[Y]], float [[A]], metadata !"round.tonearest", metadata !"fpexcept.ignore")
; CHECK-NEXT:    ret float [[R]]
;
  %a = call float @llvm.experimental.constrained.fadd.f32(float %x, float %y, metadata !"round.tonearest", metadata !"fpexcept.ignore")
  %r = call reassoc nsz float @llvm.experimental.constrained.fsub.f32(float %y, float %a, metadata !"round.tonearest", metadata !"fpexcept.ignore")
  ret float %r
}

; Y + (X - Y) --> X

define <2 x float> @fsub_fadd_common_op_vec(<2 x float> %x, <2 x float> %y) #0 {
; CHECK-LABEL: @fsub_fadd_common_op_vec(
; CHECK-NEXT:    [[S:%.*]] = call <2 x float> @llvm.experimental.constrained.fsub.v2f32(<2 x float> [[X:%.*]], <2 x float> [[Y:%.*]], metadata !"round.tonearest", metadata !"fpexcept.ignore")
; CHECK-NEXT:    [[R:%.*]] = call reassoc nsz <2 x float> @llvm.experimental.constrained.fadd.v2f32(<2 x float> [[Y]], <2 x float> [[S]], metadata !"round.tonearest", metadata !"fpexcept.ignore")
; CHECK-NEXT:    ret <2 x float> [[R]]
;
  %s = call <2 x float> @llvm.experimental.constrained.fsub.v2f32(<2 x float> %x, <2 x float> %y, metadata !"round.tonearest", metadata !"fpexcept.ignore")
  %r = call reassoc nsz <2 x float> @llvm.experimental.constrained.fadd.v2f32(<2 x float> %y, <2 x float> %s, metadata !"round.tonearest", metadata !"fpexcept.ignore")
  ret <2 x float> %r
}

; (X - Y) + Y --> X

define float @fsub_fadd_common_op_commute(float %x, float %y) #0 {
; CHECK-LABEL: @fsub_fadd_common_op_commute(
; CHECK-NEXT:    [[S:%.*]] = call float @llvm.experimental.constrained.fsub.f32(float [[X:%.*]], float [[Y:%.*]], metadata !"round.tonearest", metadata !"fpexcept.ignore")
; CHECK-NEXT:    [[R:%.*]] = call reassoc nsz float @llvm.experimental.constrained.fadd.f32(float [[S]], float [[Y]], metadata !"round.tonearest", metadata !"fpexcept.ignore")
; CHECK-NEXT:    ret float [[R]]
;
  %s = call float @llvm.experimental.constrained.fsub.f32(float %x, float %y, metadata !"round.tonearest", metadata !"fpexcept.ignore")
  %r = call reassoc nsz float @llvm.experimental.constrained.fadd.f32(float %s, float %y, metadata !"round.tonearest", metadata !"fpexcept.ignore")
  ret float %r
}

; Negative test.
; Y + (Y - X) --> ?

define float @fsub_fadd_common_op_wrong_commute(float %x, float %y) #0 {
; CHECK-LABEL: @fsub_fadd_common_op_wrong_commute(
; CHECK-NEXT:    [[S:%.*]] = call float @llvm.experimental.constrained.fsub.f32(float [[Y:%.*]], float [[X:%.*]], metadata !"round.tonearest", metadata !"fpexcept.ignore")
; CHECK-NEXT:    [[R:%.*]] = call reassoc nsz float @llvm.experimental.constrained.fadd.f32(float [[Y]], float [[S]], metadata !"round.tonearest", metadata !"fpexcept.ignore")
; CHECK-NEXT:    ret float [[R]]
;
  %s = call float @llvm.experimental.constrained.fsub.f32(float %y, float %x, metadata !"round.tonearest", metadata !"fpexcept.ignore")
  %r = call reassoc nsz float @llvm.experimental.constrained.fadd.f32(float %y, float %s, metadata !"round.tonearest", metadata !"fpexcept.ignore")
  ret float %r
}

; Negative test.
; (Y - X) + Y --> ?

define float @fsub_fadd_common_op_wrong_commute_commute(float %x, float %y) #0 {
; CHECK-LABEL: @fsub_fadd_common_op_wrong_commute_commute(
; CHECK-NEXT:    [[S:%.*]] = call float @llvm.experimental.constrained.fsub.f32(float [[Y:%.*]], float [[X:%.*]], metadata !"round.tonearest", metadata !"fpexcept.ignore")
; CHECK-NEXT:    [[R:%.*]] = call reassoc nsz float @llvm.experimental.constrained.fadd.f32(float [[S]], float [[Y]], metadata !"round.tonearest", metadata !"fpexcept.ignore")
; CHECK-NEXT:    ret float [[R]]
;
  %s = call float @llvm.experimental.constrained.fsub.f32(float %y, float %x, metadata !"round.tonearest", metadata !"fpexcept.ignore")
  %r = call reassoc nsz float @llvm.experimental.constrained.fadd.f32(float %s, float %y, metadata !"round.tonearest", metadata !"fpexcept.ignore")
  ret float %r
}

; Originally PR46627 - https://bugs.llvm.org/show_bug.cgi?id=46627

define float @maxnum_with_poszero_op(float %a) #0 {
; CHECK-LABEL: @maxnum_with_poszero_op(
; CHECK-NEXT:    [[MAX:%.*]] = call float @llvm.experimental.constrained.maxnum.f32(float [[A:%.*]], float 0.000000e+00, metadata !"fpexcept.ignore")
; CHECK-NEXT:    [[FABS:%.*]] = call float @llvm.fabs.f32(float [[MAX]]) #[[ATTR0]]
; CHECK-NEXT:    ret float [[FABS]]
;
  %max = call float @llvm.experimental.constrained.maxnum.f32(float %a, float 0.0, metadata !"fpexcept.ignore")
  %fabs = call float @llvm.fabs.f32(float %max) #0
  ret float %fabs
}

define float @maxnum_with_poszero_op_commute(float %a) #0 {
; CHECK-LABEL: @maxnum_with_poszero_op_commute(
; CHECK-NEXT:    [[SQRT:%.*]] = call float @llvm.experimental.constrained.sqrt.f32(float [[A:%.*]], metadata !"round.tonearest", metadata !"fpexcept.ignore")
; CHECK-NEXT:    [[MAX:%.*]] = call float @llvm.experimental.constrained.maxnum.f32(float 0.000000e+00, float [[SQRT]], metadata !"fpexcept.ignore")
; CHECK-NEXT:    [[FABS:%.*]] = call float @llvm.fabs.f32(float [[MAX]]) #[[ATTR0]]
; CHECK-NEXT:    ret float [[FABS]]
;
  %sqrt = call float @llvm.experimental.constrained.sqrt.f32(float %a, metadata !"round.tonearest", metadata !"fpexcept.ignore")
  %max = call float @llvm.experimental.constrained.maxnum.f32(float 0.0, float %sqrt, metadata !"fpexcept.ignore")
  %fabs = call float @llvm.fabs.f32(float %max) #0
  ret float %fabs
}

define float @maxnum_with_negzero_op(float %a) #0 {
; CHECK-LABEL: @maxnum_with_negzero_op(
; CHECK-NEXT:    [[NNAN:%.*]] = call nnan float @llvm.experimental.constrained.sqrt.f32(float [[A:%.*]], metadata !"round.tonearest", metadata !"fpexcept.ignore")
; CHECK-NEXT:    [[FABSA:%.*]] = call float @llvm.fabs.f32(float [[NNAN]]) #[[ATTR0]]
; CHECK-NEXT:    [[MAX:%.*]] = call float @llvm.experimental.constrained.maxnum.f32(float -0.000000e+00, float [[FABSA]], metadata !"fpexcept.ignore")
; CHECK-NEXT:    [[FABS:%.*]] = call float @llvm.fabs.f32(float [[MAX]]) #[[ATTR0]]
; CHECK-NEXT:    ret float [[FABS]]
;
  %nnan = call nnan float @llvm.experimental.constrained.sqrt.f32(float %a, metadata !"round.tonearest", metadata !"fpexcept.ignore")
  %fabsa = call float @llvm.fabs.f32(float %nnan) #0
  %max = call float @llvm.experimental.constrained.maxnum.f32(float -0.0, float %fabsa, metadata !"fpexcept.ignore")
  %fabs = call float @llvm.fabs.f32(float %max) #0
  ret float %fabs
}

define float @maxnum_with_negzero_op_commute(float %a) #0 {
; CHECK-LABEL: @maxnum_with_negzero_op_commute(
; CHECK-NEXT:    [[NNAN:%.*]] = call nnan float @llvm.experimental.constrained.sqrt.f32(float [[A:%.*]], metadata !"round.tonearest", metadata !"fpexcept.ignore")
; CHECK-NEXT:    [[FABSA:%.*]] = call float @llvm.fabs.f32(float [[NNAN]]) #[[ATTR0]]
; CHECK-NEXT:    [[MAX:%.*]] = call float @llvm.experimental.constrained.maxnum.f32(float [[FABSA]], float -0.000000e+00, metadata !"fpexcept.ignore")
; CHECK-NEXT:    [[FABS:%.*]] = call float @llvm.fabs.f32(float [[MAX]]) #[[ATTR0]]
; CHECK-NEXT:    ret float [[FABS]]
;
  %nnan = call nnan float @llvm.experimental.constrained.sqrt.f32(float %a, metadata !"round.tonearest", metadata !"fpexcept.ignore")
  %fabsa = call float @llvm.fabs.f32(float %nnan) #0
  %max = call float @llvm.experimental.constrained.maxnum.f32(float %fabsa, float -0.0, metadata !"fpexcept.ignore")
  %fabs = call float @llvm.fabs.f32(float %max) #0
  ret float %fabs
}

; If an operand is strictly greater than 0.0, we know the sign of the result of maxnum.

define float @maxnum_with_pos_one_op(float %a) #0 {
; CHECK-LABEL: @maxnum_with_pos_one_op(
; CHECK-NEXT:    [[MAX:%.*]] = call float @llvm.experimental.constrained.maxnum.f32(float [[A:%.*]], float 1.000000e+00, metadata !"fpexcept.ignore")
; CHECK-NEXT:    [[FABS:%.*]] = call float @llvm.fabs.f32(float [[MAX]]) #[[ATTR0]]
; CHECK-NEXT:    ret float [[FABS]]
;
  %max = call float @llvm.experimental.constrained.maxnum.f32(float %a, float 1.0, metadata !"fpexcept.ignore")
  %fabs = call float @llvm.fabs.f32(float %max) #0
  ret float %fabs
}

declare float @llvm.fabs.f32(float)
declare <2 x float> @llvm.fabs.v2f32(<2 x float>)

declare float @llvm.experimental.constrained.fadd.f32(float, float, metadata, metadata)
declare <2 x float> @llvm.experimental.constrained.fadd.v2f32(<2 x float>, <2 x float>, metadata, metadata)

declare float @llvm.experimental.constrained.fsub.f32(float, float, metadata, metadata)
declare <2 x float> @llvm.experimental.constrained.fsub.v2f32(<2 x float>, <2 x float>, metadata, metadata)

declare double @llvm.experimental.constrained.fmul.f64(double, double, metadata, metadata)
declare <4 x float> @llvm.experimental.constrained.fmul.v4f32(<4 x float>, <4 x float>, metadata, metadata)

declare float @llvm.experimental.constrained.fdiv.f32(float, float, metadata, metadata)

declare float @llvm.experimental.constrained.maxnum.f32(float, float, metadata)
declare float @llvm.experimental.constrained.sqrt.f32(float, metadata, metadata)

attributes #0 = { strictfp }