llvm/test/Transforms/InstSimplify/strictfp-fsub.ll

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

;
; constrained fsub
;

;
; fsub X, +0 ==> X
;

define float @fsub_x_p0_defaultenv(float %a) #0 {
; CHECK-LABEL: @fsub_x_p0_defaultenv(
; CHECK-NEXT:    ret float [[A:%.*]]
;
  %ret = call float @llvm.experimental.constrained.fsub.f32(float %a, float 0.0, metadata !"round.tonearest", metadata !"fpexcept.ignore") #0
  ret float %ret
}

; Missing nnan: must not fire.
define float @fsub_x_p0_ebmaytrap(float %a) #0 {
; CHECK-LABEL: @fsub_x_p0_ebmaytrap(
; CHECK-NEXT:    [[RET:%.*]] = call float @llvm.experimental.constrained.fsub.f32(float [[A:%.*]], float 0.000000e+00, metadata !"round.tonearest", metadata !"fpexcept.maytrap") #[[ATTR0:[0-9]+]]
; CHECK-NEXT:    ret float [[RET]]
;
  %ret = call float @llvm.experimental.constrained.fsub.f32(float %a, float 0.0, metadata !"round.tonearest", metadata !"fpexcept.maytrap") #0
  ret float %ret
}

; TODO: This will fold if we allow non-default floating point environments.
define float @fsub_nnan_x_p0_ebmaytrap(float %a) #0 {
; CHECK-LABEL: @fsub_nnan_x_p0_ebmaytrap(
; CHECK-NEXT:    [[RET:%.*]] = call nnan float @llvm.experimental.constrained.fsub.f32(float [[A:%.*]], float 0.000000e+00, metadata !"round.tonearest", metadata !"fpexcept.maytrap") #[[ATTR0]]
; CHECK-NEXT:    ret float [[RET]]
;
  %ret = call nnan float @llvm.experimental.constrained.fsub.f32(float %a, float 0.0, metadata !"round.tonearest", metadata !"fpexcept.maytrap") #0
  ret float %ret
}

; Missing nnan: must not fire.
define float @fsub_x_p0_ebstrict(float %a) #0 {
; CHECK-LABEL: @fsub_x_p0_ebstrict(
; CHECK-NEXT:    [[RET:%.*]] = call float @llvm.experimental.constrained.fsub.f32(float [[A:%.*]], float 0.000000e+00, metadata !"round.tonearest", metadata !"fpexcept.strict") #[[ATTR0]]
; CHECK-NEXT:    ret float [[RET]]
;
  %ret = call float @llvm.experimental.constrained.fsub.f32(float %a, float 0.0, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
  ret float %ret
}

; TODO: This will fold if we allow non-default floating point environments.
; TODO: The instruction is expected to remain, but the result isn't used.
define float @fsub_nnan_x_p0_ebstrict(float %a) #0 {
; CHECK-LABEL: @fsub_nnan_x_p0_ebstrict(
; CHECK-NEXT:    [[RET:%.*]] = call nnan float @llvm.experimental.constrained.fsub.f32(float [[A:%.*]], float 0.000000e+00, metadata !"round.tonearest", metadata !"fpexcept.strict") #[[ATTR0]]
; CHECK-NEXT:    ret float [[RET]]
;
  %ret = call nnan float @llvm.experimental.constrained.fsub.f32(float %a, float 0.0, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
  ret float %ret
}

; Test with a fast math flag set but that flag is not "nnan".
define float @fsub_ninf_x_p0_ebstrict(float %a) #0 {
; CHECK-LABEL: @fsub_ninf_x_p0_ebstrict(
; CHECK-NEXT:    [[RET:%.*]] = call ninf float @llvm.experimental.constrained.fsub.f32(float [[A:%.*]], float 0.000000e+00, metadata !"round.tonearest", metadata !"fpexcept.strict") #[[ATTR0]]
; CHECK-NEXT:    ret float [[RET]]
;
  %ret = call ninf float @llvm.experimental.constrained.fsub.f32(float %a, float 0.0, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
  ret float %ret
}

;
; fsub X, -0 ==> X, when we know X is not -0
; (fast math flag: nsz)
;

define float @fold_fsub_nsz_x_n0_defaultenv(float %a) #0 {
; CHECK-LABEL: @fold_fsub_nsz_x_n0_defaultenv(
; CHECK-NEXT:    ret float [[A:%.*]]
;
  %sub = call nsz float @llvm.experimental.constrained.fsub.f32(float %a, float -0.0, metadata !"round.tonearest", metadata !"fpexcept.ignore") #0
  ret float %sub
}

; Missing nnan: must not fire.
define float @fold_fsub_nsz_x_n0_ebmaytrap(float %a) #0 {
; CHECK-LABEL: @fold_fsub_nsz_x_n0_ebmaytrap(
; CHECK-NEXT:    [[SUB:%.*]] = call nsz float @llvm.experimental.constrained.fsub.f32(float [[A:%.*]], float -0.000000e+00, metadata !"round.tonearest", metadata !"fpexcept.maytrap") #[[ATTR0]]
; CHECK-NEXT:    ret float [[SUB]]
;
  %sub = call nsz float @llvm.experimental.constrained.fsub.f32(float %a, float -0.0, metadata !"round.tonearest", metadata !"fpexcept.maytrap") #0
  ret float %sub
}

; TODO: This will fold if we allow non-default floating point environments.
define float @fold_fsub_nnan_nsz_x_n0_ebmaytrap(float %a) #0 {
; CHECK-LABEL: @fold_fsub_nnan_nsz_x_n0_ebmaytrap(
; CHECK-NEXT:    [[SUB:%.*]] = call nnan nsz float @llvm.experimental.constrained.fsub.f32(float [[A:%.*]], float -0.000000e+00, metadata !"round.tonearest", metadata !"fpexcept.maytrap") #[[ATTR0]]
; CHECK-NEXT:    ret float [[SUB]]
;
  %sub = call nnan nsz float @llvm.experimental.constrained.fsub.f32(float %a, float -0.0, metadata !"round.tonearest", metadata !"fpexcept.maytrap") #0
  ret float %sub
}

; Missing nnan: must not fire.
define float @fold_fsub_nsz_x_n0_ebstrict(float %a) #0 {
; CHECK-LABEL: @fold_fsub_nsz_x_n0_ebstrict(
; CHECK-NEXT:    [[SUB:%.*]] = call nsz float @llvm.experimental.constrained.fsub.f32(float [[A:%.*]], float -0.000000e+00, metadata !"round.tonearest", metadata !"fpexcept.strict") #[[ATTR0]]
; CHECK-NEXT:    ret float [[SUB]]
;
  %sub = call nsz float @llvm.experimental.constrained.fsub.f32(float %a, float -0.0, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
  ret float %sub
}

; TODO: This will fold if we allow non-default floating point environments.
; TODO: The instruction is expected to remain, but the result isn't used.
define float @fold_fsub_nsz_nnan_x_n0_ebstrict(float %a) #0 {
; CHECK-LABEL: @fold_fsub_nsz_nnan_x_n0_ebstrict(
; CHECK-NEXT:    [[SUB:%.*]] = call nnan nsz float @llvm.experimental.constrained.fsub.f32(float [[A:%.*]], float -0.000000e+00, metadata !"round.tonearest", metadata !"fpexcept.strict") #[[ATTR0]]
; CHECK-NEXT:    ret float [[SUB]]
;
  %sub = call nsz nnan float @llvm.experimental.constrained.fsub.f32(float %a, float -0.0, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
  ret float %sub
}

;
; fsub X, -0 ==> X, when we know X is not -0
; (No "nsz" flags)
;

define float @fold_fsub_fabs_x_n0_defaultenv(float %a) #0 {
; CHECK-LABEL: @fold_fsub_fabs_x_n0_defaultenv(
; CHECK-NEXT:    [[ABSA:%.*]] = call float @llvm.fabs.f32(float [[A:%.*]])
; CHECK-NEXT:    ret float [[ABSA]]
;
  %absa = call float @llvm.fabs.f32(float %a)
  %sub = call float @llvm.experimental.constrained.fsub.f32(float %absa, float -0.0, metadata !"round.tonearest", metadata !"fpexcept.ignore") #0
  ret float %sub
}

; Missing nnan: must not fire.
define float @fold_fsub_fabs_x_n0_ebmaytrap(float %a) #0 {
; CHECK-LABEL: @fold_fsub_fabs_x_n0_ebmaytrap(
; CHECK-NEXT:    [[ABSA:%.*]] = call float @llvm.fabs.f32(float [[A:%.*]])
; CHECK-NEXT:    [[SUB:%.*]] = call float @llvm.experimental.constrained.fsub.f32(float [[ABSA]], float -0.000000e+00, metadata !"round.tonearest", metadata !"fpexcept.maytrap") #[[ATTR0]]
; CHECK-NEXT:    ret float [[SUB]]
;
  %absa = call float @llvm.fabs.f32(float %a)
  %sub = call float @llvm.experimental.constrained.fsub.f32(float %absa, float -0.0, metadata !"round.tonearest", metadata !"fpexcept.maytrap") #0
  ret float %sub
}

; TODO: This will fold if we allow non-default floating point environments.
define float @fold_fsub_fabs_nnan_x_n0_ebmaytrap(float %a) #0 {
; CHECK-LABEL: @fold_fsub_fabs_nnan_x_n0_ebmaytrap(
; CHECK-NEXT:    [[ABSA:%.*]] = call float @llvm.fabs.f32(float [[A:%.*]])
; CHECK-NEXT:    [[SUB:%.*]] = call nnan float @llvm.experimental.constrained.fsub.f32(float [[ABSA]], float -0.000000e+00, metadata !"round.tonearest", metadata !"fpexcept.maytrap") #[[ATTR0]]
; CHECK-NEXT:    ret float [[SUB]]
;
  %absa = call float @llvm.fabs.f32(float %a)
  %sub = call nnan float @llvm.experimental.constrained.fsub.f32(float %absa, float -0.0, metadata !"round.tonearest", metadata !"fpexcept.maytrap") #0
  ret float %sub
}

; Missing nnan: must not fire.
define float @fold_fsub_fabs_x_n0_ebstrict(float %a) #0 {
; CHECK-LABEL: @fold_fsub_fabs_x_n0_ebstrict(
; CHECK-NEXT:    [[ABSA:%.*]] = call float @llvm.fabs.f32(float [[A:%.*]])
; CHECK-NEXT:    [[SUB:%.*]] = call float @llvm.experimental.constrained.fsub.f32(float [[ABSA]], float -0.000000e+00, metadata !"round.tonearest", metadata !"fpexcept.strict") #[[ATTR0]]
; CHECK-NEXT:    ret float [[SUB]]
;
  %absa = call float @llvm.fabs.f32(float %a)
  %sub = call float @llvm.experimental.constrained.fsub.f32(float %absa, float -0.0, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
  ret float %sub
}

; TODO: This will fold if we allow non-default floating point environments.
; TODO: The instruction is expected to remain, but the result isn't used.
define float @fold_fsub_fabs_nnan_x_n0_ebstrict(float %a) #0 {
; CHECK-LABEL: @fold_fsub_fabs_nnan_x_n0_ebstrict(
; CHECK-NEXT:    [[ABSA:%.*]] = call float @llvm.fabs.f32(float [[A:%.*]])
; CHECK-NEXT:    [[SUB:%.*]] = call nnan float @llvm.experimental.constrained.fsub.f32(float [[ABSA]], float -0.000000e+00, metadata !"round.tonearest", metadata !"fpexcept.strict") #[[ATTR0]]
; CHECK-NEXT:    ret float [[SUB]]
;
  %absa = call float @llvm.fabs.f32(float %a)
  %sub = call nnan float @llvm.experimental.constrained.fsub.f32(float %absa, float -0.0, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
  ret float %sub
}

; TODO: This can't fire currently due to missing constrained support:
define float @fold_fsub_sitofp_x_n0_defaultenv(i32 %a) #0 {
; CHECK-LABEL: @fold_fsub_sitofp_x_n0_defaultenv(
; CHECK-NEXT:    [[FPA:%.*]] = call float @llvm.experimental.constrained.sitofp.f32.i32(i32 [[A:%.*]], metadata !"round.tonearest", metadata !"fpexcept.ignore") #[[ATTR0]]
; CHECK-NEXT:    [[SUB:%.*]] = call float @llvm.experimental.constrained.fsub.f32(float [[FPA]], float -0.000000e+00, metadata !"round.tonearest", metadata !"fpexcept.ignore") #[[ATTR0]]
; CHECK-NEXT:    ret float [[SUB]]
;
  %fpa = call float @llvm.experimental.constrained.sitofp.f32.i32(i32 %a, metadata !"round.tonearest", metadata !"fpexcept.ignore") #0
  %sub = call float @llvm.experimental.constrained.fsub.f32(float %fpa, float -0.0, metadata !"round.tonearest", metadata !"fpexcept.ignore") #0
  ret float %sub
}

;
; fsub -0.0, (fneg X) ==> X
;

define float @fsub_fneg_n0_fnX_defaultenv(float %a) #0 {
; CHECK-LABEL: @fsub_fneg_n0_fnX_defaultenv(
; CHECK-NEXT:    ret float [[A:%.*]]
;
  %nega = fneg float %a
  %ret = call float @llvm.experimental.constrained.fsub.f32(float -0.0, float %nega, metadata !"round.tonearest", metadata !"fpexcept.ignore") #0
  ret float %ret
}

; Missing nnan: must not fire.
define float @fsub_fneg_n0_fnX_ebmaytrap(float %a) #0 {
; CHECK-LABEL: @fsub_fneg_n0_fnX_ebmaytrap(
; CHECK-NEXT:    [[NEGA:%.*]] = fneg float [[A:%.*]]
; CHECK-NEXT:    [[RET:%.*]] = call float @llvm.experimental.constrained.fsub.f32(float -0.000000e+00, float [[NEGA]], metadata !"round.tonearest", metadata !"fpexcept.maytrap") #[[ATTR0]]
; CHECK-NEXT:    ret float [[RET]]
;
  %nega = fneg float %a
  %ret = call float @llvm.experimental.constrained.fsub.f32(float -0.0, float %nega, metadata !"round.tonearest", metadata !"fpexcept.maytrap") #0
  ret float %ret
}

; TODO: This will fold if we allow non-default floating point environments.
define float @fsub_fneg_nnan_n0_fnX_ebmaytrap(float %a) #0 {
; CHECK-LABEL: @fsub_fneg_nnan_n0_fnX_ebmaytrap(
; CHECK-NEXT:    [[NEGA:%.*]] = fneg float [[A:%.*]]
; CHECK-NEXT:    [[RET:%.*]] = call nnan float @llvm.experimental.constrained.fsub.f32(float -0.000000e+00, float [[NEGA]], metadata !"round.tonearest", metadata !"fpexcept.maytrap") #[[ATTR0]]
; CHECK-NEXT:    ret float [[RET]]
;
  %nega = fneg float %a
  %ret = call nnan float @llvm.experimental.constrained.fsub.f32(float -0.0, float %nega, metadata !"round.tonearest", metadata !"fpexcept.maytrap") #0
  ret float %ret
}

; Missing nnan: must not fire.
define float @fsub_fneg_n0_fnX_ebstrict(float %a) #0 {
; CHECK-LABEL: @fsub_fneg_n0_fnX_ebstrict(
; CHECK-NEXT:    [[NEGA:%.*]] = fneg float [[A:%.*]]
; CHECK-NEXT:    [[RET:%.*]] = call float @llvm.experimental.constrained.fsub.f32(float -0.000000e+00, float [[NEGA]], metadata !"round.tonearest", metadata !"fpexcept.strict") #[[ATTR0]]
; CHECK-NEXT:    ret float [[RET]]
;
  %nega = fneg float %a
  %ret = call float @llvm.experimental.constrained.fsub.f32(float -0.0, float %nega, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
  ret float %ret
}

; TODO: This will fold if we allow non-default floating point environments.
; TODO: The instruction is expected to remain, but the result isn't used.
define float @fsub_fneg_nnan_n0_fnX_ebstrict(float %a) #0 {
; CHECK-LABEL: @fsub_fneg_nnan_n0_fnX_ebstrict(
; CHECK-NEXT:    [[NEGA:%.*]] = fneg float [[A:%.*]]
; CHECK-NEXT:    [[RET:%.*]] = call nnan float @llvm.experimental.constrained.fsub.f32(float -0.000000e+00, float [[NEGA]], metadata !"round.tonearest", metadata !"fpexcept.strict") #[[ATTR0]]
; CHECK-NEXT:    ret float [[RET]]
;
  %nega = fneg float %a
  %ret = call nnan float @llvm.experimental.constrained.fsub.f32(float -0.0, float %nega, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
  ret float %ret
}

;
; fsub -0.0, (fsub -0.0, X) ==> X
;

; TODO: This won't fire without m_FNeg() knowing the constrained intrinsics.
define float @fsub_fsub_n0_fnX_defaultenv(float %a) #0 {
; CHECK-LABEL: @fsub_fsub_n0_fnX_defaultenv(
; CHECK-NEXT:    [[NEGA:%.*]] = call float @llvm.experimental.constrained.fsub.f32(float -0.000000e+00, float [[A:%.*]], metadata !"round.tonearest", metadata !"fpexcept.ignore") #[[ATTR0]]
; CHECK-NEXT:    [[RET:%.*]] = call float @llvm.experimental.constrained.fsub.f32(float -0.000000e+00, float [[NEGA]], metadata !"round.tonearest", metadata !"fpexcept.ignore") #[[ATTR0]]
; CHECK-NEXT:    ret float [[RET]]
;
  %nega = call float @llvm.experimental.constrained.fsub.f32(float -0.0, float %a, metadata !"round.tonearest", metadata !"fpexcept.ignore") #0
  %ret = call float @llvm.experimental.constrained.fsub.f32(float -0.0, float %nega, metadata !"round.tonearest", metadata !"fpexcept.ignore") #0
  ret float %ret
}

; Missing nnan: must not fire.
define float @fsub_fsub_n0_fnX_ebmaytrap(float %a) #0 {
; CHECK-LABEL: @fsub_fsub_n0_fnX_ebmaytrap(
; CHECK-NEXT:    [[NEGA:%.*]] = call float @llvm.experimental.constrained.fsub.f32(float -0.000000e+00, float [[A:%.*]], metadata !"round.tonearest", metadata !"fpexcept.maytrap") #[[ATTR0]]
; CHECK-NEXT:    [[RET:%.*]] = call float @llvm.experimental.constrained.fsub.f32(float -0.000000e+00, float [[NEGA]], metadata !"round.tonearest", metadata !"fpexcept.maytrap") #[[ATTR0]]
; CHECK-NEXT:    ret float [[RET]]
;
  %nega = call float @llvm.experimental.constrained.fsub.f32(float -0.0, float %a, metadata !"round.tonearest", metadata !"fpexcept.maytrap") #0
  %ret = call float @llvm.experimental.constrained.fsub.f32(float -0.0, float %nega, metadata !"round.tonearest", metadata !"fpexcept.maytrap") #0
  ret float %ret
}

; TODO: This won't fire without m_FNeg() knowing the constrained intrinsics.
define float @fsub_fsub_nnan_n0_fnX_ebmaytrap(float %a) #0 {
; CHECK-LABEL: @fsub_fsub_nnan_n0_fnX_ebmaytrap(
; CHECK-NEXT:    [[NEGA:%.*]] = call float @llvm.experimental.constrained.fsub.f32(float -0.000000e+00, float [[A:%.*]], metadata !"round.tonearest", metadata !"fpexcept.maytrap") #[[ATTR0]]
; CHECK-NEXT:    [[RET:%.*]] = call nnan float @llvm.experimental.constrained.fsub.f32(float -0.000000e+00, float [[NEGA]], metadata !"round.tonearest", metadata !"fpexcept.maytrap") #[[ATTR0]]
; CHECK-NEXT:    ret float [[RET]]
;
  %nega = call float @llvm.experimental.constrained.fsub.f32(float -0.0, float %a, metadata !"round.tonearest", metadata !"fpexcept.maytrap") #0
  %ret = call nnan float @llvm.experimental.constrained.fsub.f32(float -0.0, float %nega, metadata !"round.tonearest", metadata !"fpexcept.maytrap") #0
  ret float %ret
}

; Missing nnan: must not fire.
define float @fsub_fsub_n0_fnX_ebstrict(float %a) #0 {
; CHECK-LABEL: @fsub_fsub_n0_fnX_ebstrict(
; CHECK-NEXT:    [[NEGA:%.*]] = call float @llvm.experimental.constrained.fsub.f32(float -0.000000e+00, float [[A:%.*]], metadata !"round.tonearest", metadata !"fpexcept.strict") #[[ATTR0]]
; CHECK-NEXT:    [[RET:%.*]] = call float @llvm.experimental.constrained.fsub.f32(float -0.000000e+00, float [[NEGA]], metadata !"round.tonearest", metadata !"fpexcept.strict") #[[ATTR0]]
; CHECK-NEXT:    ret float [[RET]]
;
  %nega = call float @llvm.experimental.constrained.fsub.f32(float -0.0, float %a, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
  %ret = call float @llvm.experimental.constrained.fsub.f32(float -0.0, float %nega, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
  ret float %ret
}

; TODO: This won't fire without m_FNeg() knowing the constrained intrinsics.
define float @fsub_fsub_nnan_n0_fnX_ebstrict(float %a) #0 {
; CHECK-LABEL: @fsub_fsub_nnan_n0_fnX_ebstrict(
; CHECK-NEXT:    [[NEGA:%.*]] = call nnan float @llvm.experimental.constrained.fsub.f32(float -0.000000e+00, float [[A:%.*]], metadata !"round.tonearest", metadata !"fpexcept.strict") #[[ATTR0]]
; CHECK-NEXT:    [[RET:%.*]] = call nnan float @llvm.experimental.constrained.fsub.f32(float -0.000000e+00, float [[NEGA]], metadata !"round.tonearest", metadata !"fpexcept.strict") #[[ATTR0]]
; CHECK-NEXT:    ret float [[RET]]
;
  %nega = call nnan float @llvm.experimental.constrained.fsub.f32(float -0.0, float %a, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
  %ret = call nnan float @llvm.experimental.constrained.fsub.f32(float -0.0, float %nega, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
  ret float %ret
}

;
; fsub 0.0, (fneg X) ==> X if signed zeros are ignored.
;

define float @fsub_fneg_nsz_p0_fnX_defaultenv(float %a) #0 {
; CHECK-LABEL: @fsub_fneg_nsz_p0_fnX_defaultenv(
; CHECK-NEXT:    ret float [[A:%.*]]
;
  %nega = fneg float %a
  %ret = call nsz float @llvm.experimental.constrained.fsub.f32(float 0.0, float %nega, metadata !"round.tonearest", metadata !"fpexcept.ignore") #0
  ret float %ret
}

; Missing nnan: must not fire.
define float @fsub_fneg_nsz_p0_fnX_ebmaytrap(float %a) #0 {
; CHECK-LABEL: @fsub_fneg_nsz_p0_fnX_ebmaytrap(
; CHECK-NEXT:    [[NEGA:%.*]] = fneg float [[A:%.*]]
; CHECK-NEXT:    [[RET:%.*]] = call nsz float @llvm.experimental.constrained.fsub.f32(float 0.000000e+00, float [[NEGA]], metadata !"round.tonearest", metadata !"fpexcept.maytrap") #[[ATTR0]]
; CHECK-NEXT:    ret float [[RET]]
;
  %nega = fneg float %a
  %ret = call nsz float @llvm.experimental.constrained.fsub.f32(float 0.0, float %nega, metadata !"round.tonearest", metadata !"fpexcept.maytrap") #0
  ret float %ret
}

; TODO: This will fold if we allow non-default floating point environments.
define float @fsub_fneg_nsz_nnan_p0_fnX_ebmaytrap(float %a) #0 {
; CHECK-LABEL: @fsub_fneg_nsz_nnan_p0_fnX_ebmaytrap(
; CHECK-NEXT:    [[NEGA:%.*]] = fneg float [[A:%.*]]
; CHECK-NEXT:    [[RET:%.*]] = call nnan nsz float @llvm.experimental.constrained.fsub.f32(float 0.000000e+00, float [[NEGA]], metadata !"round.tonearest", metadata !"fpexcept.maytrap") #[[ATTR0]]
; CHECK-NEXT:    ret float [[RET]]
;
  %nega = fneg float %a
  %ret = call nnan nsz float @llvm.experimental.constrained.fsub.f32(float 0.0, float %nega, metadata !"round.tonearest", metadata !"fpexcept.maytrap") #0
  ret float %ret
}

; Missing nnan: must not fire.
define float @fsub_fneg_nsz_p0_fnX_ebstrict(float %a) #0 {
; CHECK-LABEL: @fsub_fneg_nsz_p0_fnX_ebstrict(
; CHECK-NEXT:    [[NEGA:%.*]] = fneg float [[A:%.*]]
; CHECK-NEXT:    [[RET:%.*]] = call nsz float @llvm.experimental.constrained.fsub.f32(float 0.000000e+00, float [[NEGA]], metadata !"round.tonearest", metadata !"fpexcept.strict") #[[ATTR0]]
; CHECK-NEXT:    ret float [[RET]]
;
  %nega = fneg float %a
  %ret = call nsz float @llvm.experimental.constrained.fsub.f32(float 0.0, float %nega, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
  ret float %ret
}

; TODO: This will fold if we allow non-default floating point environments.
; TODO: The instruction is expected to remain, but the result isn't used.
define float @fsub_fneg_nnan_nsz_p0_fnX_ebstrict(float %a) #0 {
; CHECK-LABEL: @fsub_fneg_nnan_nsz_p0_fnX_ebstrict(
; CHECK-NEXT:    [[NEGA:%.*]] = fneg float [[A:%.*]]
; CHECK-NEXT:    [[RET:%.*]] = call nnan nsz float @llvm.experimental.constrained.fsub.f32(float 0.000000e+00, float [[NEGA]], metadata !"round.tonearest", metadata !"fpexcept.strict") #[[ATTR0]]
; CHECK-NEXT:    ret float [[RET]]
;
  %nega = fneg float %a
  %ret = call nnan nsz float @llvm.experimental.constrained.fsub.f32(float 0.0, float %nega, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
  ret float %ret
}

;
; fsub 0.0, (fsub 0.0, X) ==> X if signed zeros are ignored.
;

; TODO: Need constrained intrinsic support in m_FNeg() and m_FSub to fire.
define float @fsub_fsub_p0_nsz_fnX_defaultenv(float %a) #0 {
; CHECK-LABEL: @fsub_fsub_p0_nsz_fnX_defaultenv(
; CHECK-NEXT:    [[NEGA:%.*]] = call nsz float @llvm.experimental.constrained.fsub.f32(float 0.000000e+00, float [[A:%.*]], metadata !"round.tonearest", metadata !"fpexcept.ignore") #[[ATTR0]]
; CHECK-NEXT:    [[RET:%.*]] = call nsz float @llvm.experimental.constrained.fsub.f32(float 0.000000e+00, float [[NEGA]], metadata !"round.tonearest", metadata !"fpexcept.ignore") #[[ATTR0]]
; CHECK-NEXT:    ret float [[RET]]
;
  %nega = call nsz float @llvm.experimental.constrained.fsub.f32(float 0.0, float %a, metadata !"round.tonearest", metadata !"fpexcept.ignore") #0
  %ret = call nsz float @llvm.experimental.constrained.fsub.f32(float 0.0, float %nega, metadata !"round.tonearest", metadata !"fpexcept.ignore") #0
  ret float %ret
}

; Missing nnan: must not fire.
define float @fsub_fsub_nsz_p0_fnX_ebmaytrap(float %a) #0 {
; CHECK-LABEL: @fsub_fsub_nsz_p0_fnX_ebmaytrap(
; CHECK-NEXT:    [[NEGA:%.*]] = call nsz float @llvm.experimental.constrained.fsub.f32(float 0.000000e+00, float [[A:%.*]], metadata !"round.tonearest", metadata !"fpexcept.maytrap") #[[ATTR0]]
; CHECK-NEXT:    [[RET:%.*]] = call nsz float @llvm.experimental.constrained.fsub.f32(float 0.000000e+00, float [[NEGA]], metadata !"round.tonearest", metadata !"fpexcept.maytrap") #[[ATTR0]]
; CHECK-NEXT:    ret float [[RET]]
;
  %nega = call nsz float @llvm.experimental.constrained.fsub.f32(float 0.0, float %a, metadata !"round.tonearest", metadata !"fpexcept.maytrap") #0
  %ret = call nsz float @llvm.experimental.constrained.fsub.f32(float 0.0, float %nega, metadata !"round.tonearest", metadata !"fpexcept.maytrap") #0
  ret float %ret
}

; TODO: Need constrained intrinsic support in m_FNeg() and m_FSub to fire.
define float @fsub_fsub_nnan_nsz_p0_fnX_ebmaytrap(float %a) #0 {
; CHECK-LABEL: @fsub_fsub_nnan_nsz_p0_fnX_ebmaytrap(
; CHECK-NEXT:    [[NEGA:%.*]] = call nnan nsz float @llvm.experimental.constrained.fsub.f32(float 0.000000e+00, float [[A:%.*]], metadata !"round.tonearest", metadata !"fpexcept.maytrap") #[[ATTR0]]
; CHECK-NEXT:    [[RET:%.*]] = call nnan nsz float @llvm.experimental.constrained.fsub.f32(float 0.000000e+00, float [[NEGA]], metadata !"round.tonearest", metadata !"fpexcept.maytrap") #[[ATTR0]]
; CHECK-NEXT:    ret float [[RET]]
;
  %nega = call nnan nsz float @llvm.experimental.constrained.fsub.f32(float 0.0, float %a, metadata !"round.tonearest", metadata !"fpexcept.maytrap") #0
  %ret = call nnan nsz float @llvm.experimental.constrained.fsub.f32(float 0.0, float %nega, metadata !"round.tonearest", metadata !"fpexcept.maytrap") #0
  ret float %ret
}

; Missing nnan: must not fire.
define float @fsub_fsub_nsz_p0_fnX_ebstrict(float %a) #0 {
; CHECK-LABEL: @fsub_fsub_nsz_p0_fnX_ebstrict(
; CHECK-NEXT:    [[NEGA:%.*]] = call nsz float @llvm.experimental.constrained.fsub.f32(float 0.000000e+00, float [[A:%.*]], metadata !"round.tonearest", metadata !"fpexcept.strict") #[[ATTR0]]
; CHECK-NEXT:    [[RET:%.*]] = call nsz float @llvm.experimental.constrained.fsub.f32(float 0.000000e+00, float [[NEGA]], metadata !"round.tonearest", metadata !"fpexcept.strict") #[[ATTR0]]
; CHECK-NEXT:    ret float [[RET]]
;
  %nega = call nsz float @llvm.experimental.constrained.fsub.f32(float 0.0, float %a, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
  %ret = call nsz float @llvm.experimental.constrained.fsub.f32(float 0.0, float %nega, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
  ret float %ret
}

; TODO: Need constrained intrinsic support in m_FNeg() and m_FSub to fire.
define float @fsub_fsub_nnan_nsz_p0_fnX_ebstrict(float %a) #0 {
; CHECK-LABEL: @fsub_fsub_nnan_nsz_p0_fnX_ebstrict(
; CHECK-NEXT:    [[NEGA:%.*]] = call nnan nsz float @llvm.experimental.constrained.fsub.f32(float 0.000000e+00, float [[A:%.*]], metadata !"round.tonearest", metadata !"fpexcept.strict") #[[ATTR0]]
; CHECK-NEXT:    [[RET:%.*]] = call nnan nsz float @llvm.experimental.constrained.fsub.f32(float 0.000000e+00, float [[NEGA]], metadata !"round.tonearest", metadata !"fpexcept.strict") #[[ATTR0]]
; CHECK-NEXT:    ret float [[RET]]
;
  %nega = call nnan nsz float @llvm.experimental.constrained.fsub.f32(float 0.0, float %a, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
  %ret = call nnan nsz float @llvm.experimental.constrained.fsub.f32(float 0.0, float %nega, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
  ret float %ret
}

;
; fsub nnan x, x ==> 0.0
;

; Missing nnan: must not fire.
define float @fsub_x_x_defaultenv(float %a) #0 {
; CHECK-LABEL: @fsub_x_x_defaultenv(
; CHECK-NEXT:    [[RET:%.*]] = call float @llvm.experimental.constrained.fsub.f32(float [[A:%.*]], float [[A]], metadata !"round.tonearest", metadata !"fpexcept.ignore") #[[ATTR0]]
; CHECK-NEXT:    ret float [[RET]]
;
  %ret = call float @llvm.experimental.constrained.fsub.f32(float %a, float %a, metadata !"round.tonearest", metadata !"fpexcept.ignore") #0
  ret float %ret
}

define float @fsub_nnan_x_x_defaultenv(float %a) #0 {
; CHECK-LABEL: @fsub_nnan_x_x_defaultenv(
; CHECK-NEXT:    ret float 0.000000e+00
;
  %ret = call nnan float @llvm.experimental.constrained.fsub.f32(float %a, float %a, metadata !"round.tonearest", metadata !"fpexcept.ignore") #0
  ret float %ret
}

; Missing nnan: must not fire.
define float @fsub_x_x_ebmaytrap(float %a) #0 {
; CHECK-LABEL: @fsub_x_x_ebmaytrap(
; CHECK-NEXT:    [[RET:%.*]] = call float @llvm.experimental.constrained.fsub.f32(float [[A:%.*]], float [[A]], metadata !"round.tonearest", metadata !"fpexcept.maytrap") #[[ATTR0]]
; CHECK-NEXT:    ret float [[RET]]
;
  %ret = call float @llvm.experimental.constrained.fsub.f32(float %a, float %a, metadata !"round.tonearest", metadata !"fpexcept.maytrap") #0
  ret float %ret
}

; TODO: This will fold if we allow non-default floating point environments.
define float @fsub_nnan_x_x_ebmaytrap(float %a) #0 {
; CHECK-LABEL: @fsub_nnan_x_x_ebmaytrap(
; CHECK-NEXT:    [[RET:%.*]] = call nnan float @llvm.experimental.constrained.fsub.f32(float [[A:%.*]], float [[A]], metadata !"round.tonearest", metadata !"fpexcept.maytrap") #[[ATTR0]]
; CHECK-NEXT:    ret float [[RET]]
;
  %ret = call nnan float @llvm.experimental.constrained.fsub.f32(float %a, float %a, metadata !"round.tonearest", metadata !"fpexcept.maytrap") #0
  ret float %ret
}

; Missing nnan: must not fire.
define float @fsub_x_x_ebstrict(float %a) #0 {
; CHECK-LABEL: @fsub_x_x_ebstrict(
; CHECK-NEXT:    [[RET:%.*]] = call float @llvm.experimental.constrained.fsub.f32(float [[A:%.*]], float [[A]], metadata !"round.tonearest", metadata !"fpexcept.strict") #[[ATTR0]]
; CHECK-NEXT:    ret float [[RET]]
;
  %ret = call float @llvm.experimental.constrained.fsub.f32(float %a, float %a, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
  ret float %ret
}

; TODO: This will fold if we allow non-default floating point environments.
; TODO: The instruction is expected to remain, but the result isn't used.
define float @fsub_nnan_x_x_ebstrict(float %a) #0 {
; CHECK-LABEL: @fsub_nnan_x_x_ebstrict(
; CHECK-NEXT:    [[RET:%.*]] = call nnan float @llvm.experimental.constrained.fsub.f32(float [[A:%.*]], float [[A]], metadata !"round.tonearest", metadata !"fpexcept.strict") #[[ATTR0]]
; CHECK-NEXT:    ret float [[RET]]
;
  %ret = call nnan float @llvm.experimental.constrained.fsub.f32(float %a, float %a, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
  ret float %ret
}

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

; Missing nsz and reassoc: must not fire
define float @fsub_fsub_y_x_x_defaultenv(float %x, float %y) #0 {
; CHECK-LABEL: @fsub_fsub_y_x_x_defaultenv(
; CHECK-NEXT:    [[INNER:%.*]] = call float @llvm.experimental.constrained.fsub.f32(float [[Y:%.*]], float [[X:%.*]], metadata !"round.tonearest", metadata !"fpexcept.ignore") #[[ATTR0]]
; CHECK-NEXT:    [[RET:%.*]] = call float @llvm.experimental.constrained.fsub.f32(float [[Y]], float [[INNER]], metadata !"round.tonearest", metadata !"fpexcept.ignore") #[[ATTR0]]
; CHECK-NEXT:    ret float [[RET]]
;
  %inner = call float @llvm.experimental.constrained.fsub.f32(float %y, float %x, metadata !"round.tonearest", metadata !"fpexcept.ignore") #0
  %ret = call float @llvm.experimental.constrained.fsub.f32(float %y, float %inner, metadata !"round.tonearest", metadata !"fpexcept.ignore") #0
  ret float %ret
}

; TODO: Need constrained intrinsic support in m_c_FAdd() and m_FSub to fire.
define float @fsub_fsub_fmf_y_x_x_defaultenv(float %x, float %y) #0 {
; CHECK-LABEL: @fsub_fsub_fmf_y_x_x_defaultenv(
; CHECK-NEXT:    [[INNER:%.*]] = call float @llvm.experimental.constrained.fsub.f32(float [[Y:%.*]], float [[X:%.*]], metadata !"round.tonearest", metadata !"fpexcept.ignore") #[[ATTR0]]
; CHECK-NEXT:    [[RET:%.*]] = call reassoc nsz float @llvm.experimental.constrained.fsub.f32(float [[Y]], float [[INNER]], metadata !"round.tonearest", metadata !"fpexcept.ignore") #[[ATTR0]]
; CHECK-NEXT:    ret float [[RET]]
;
  %inner = call float @llvm.experimental.constrained.fsub.f32(float %y, float %x, metadata !"round.tonearest", metadata !"fpexcept.ignore") #0
  %ret = call nsz reassoc float @llvm.experimental.constrained.fsub.f32(float %y, float %inner, metadata !"round.tonearest", metadata !"fpexcept.ignore") #0
  ret float %ret
}

; TODO: Consider how alternate rounding modes can break these transforms.

; The "fpexcept.maytrap" instruction must _not_ be folded into the
; "fpexcept.ignore" instruction. This must not fire.
define float @fsub_fsub_fmf_y_x_x_ebmaytrap_defaultenv(float %x, float %y) #0 {
; CHECK-LABEL: @fsub_fsub_fmf_y_x_x_ebmaytrap_defaultenv(
; CHECK-NEXT:    [[INNER:%.*]] = call float @llvm.experimental.constrained.fsub.f32(float [[Y:%.*]], float [[X:%.*]], metadata !"round.tonearest", metadata !"fpexcept.maytrap") #[[ATTR0]]
; CHECK-NEXT:    [[RET:%.*]] = call reassoc nsz float @llvm.experimental.constrained.fsub.f32(float [[Y]], float [[INNER]], metadata !"round.tonearest", metadata !"fpexcept.ignore") #[[ATTR0]]
; CHECK-NEXT:    ret float [[RET]]
;
  %inner = call float @llvm.experimental.constrained.fsub.f32(float %y, float %x, metadata !"round.tonearest", metadata !"fpexcept.maytrap") #0
  %ret = call nsz reassoc float @llvm.experimental.constrained.fsub.f32(float %y, float %inner, metadata !"round.tonearest", metadata !"fpexcept.ignore") #0
  ret float %ret
}

; Missing nsz and reassoc: must not fire
define float @fsub_fsub_y_x_x_ebmaytrap(float %x, float %y) #0 {
; CHECK-LABEL: @fsub_fsub_y_x_x_ebmaytrap(
; CHECK-NEXT:    [[INNER:%.*]] = call float @llvm.experimental.constrained.fsub.f32(float [[Y:%.*]], float [[X:%.*]], metadata !"round.tonearest", metadata !"fpexcept.maytrap") #[[ATTR0]]
; CHECK-NEXT:    [[RET:%.*]] = call float @llvm.experimental.constrained.fsub.f32(float [[Y]], float [[INNER]], metadata !"round.tonearest", metadata !"fpexcept.maytrap") #[[ATTR0]]
; CHECK-NEXT:    ret float [[RET]]
;
  %inner = call float @llvm.experimental.constrained.fsub.f32(float %y, float %x, metadata !"round.tonearest", metadata !"fpexcept.maytrap") #0
  %ret = call float @llvm.experimental.constrained.fsub.f32(float %y, float %inner, metadata !"round.tonearest", metadata !"fpexcept.maytrap") #0
  ret float %ret
}

; TODO: Need constrained intrinsic support in m_c_FAdd() and m_FSub to fire.
define float @fsub_fsub_fmf_y_x_x_ebmaytrap(float %x, float %y) #0 {
; CHECK-LABEL: @fsub_fsub_fmf_y_x_x_ebmaytrap(
; CHECK-NEXT:    [[INNER:%.*]] = call float @llvm.experimental.constrained.fsub.f32(float [[Y:%.*]], float [[X:%.*]], metadata !"round.tonearest", metadata !"fpexcept.maytrap") #[[ATTR0]]
; CHECK-NEXT:    [[RET:%.*]] = call reassoc nsz float @llvm.experimental.constrained.fsub.f32(float [[Y]], float [[INNER]], metadata !"round.tonearest", metadata !"fpexcept.maytrap") #[[ATTR0]]
; CHECK-NEXT:    ret float [[RET]]
;
  %inner = call float @llvm.experimental.constrained.fsub.f32(float %y, float %x, metadata !"round.tonearest", metadata !"fpexcept.maytrap") #0
  %ret = call nsz reassoc float @llvm.experimental.constrained.fsub.f32(float %y, float %inner, metadata !"round.tonearest", metadata !"fpexcept.maytrap") #0
  ret float %ret
}

; Missing nsz and reassoc: must not fire
define float @fsub_fsub_y_x_x_ebstrict(float %x, float %y) #0 {
; CHECK-LABEL: @fsub_fsub_y_x_x_ebstrict(
; CHECK-NEXT:    [[INNER:%.*]] = call float @llvm.experimental.constrained.fsub.f32(float [[Y:%.*]], float [[X:%.*]], metadata !"round.tonearest", metadata !"fpexcept.strict") #[[ATTR0]]
; CHECK-NEXT:    [[RET:%.*]] = call float @llvm.experimental.constrained.fsub.f32(float [[Y]], float [[INNER]], metadata !"round.tonearest", metadata !"fpexcept.strict") #[[ATTR0]]
; CHECK-NEXT:    ret float [[RET]]
;
  %inner = call float @llvm.experimental.constrained.fsub.f32(float %y, float %x, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
  %ret = call float @llvm.experimental.constrained.fsub.f32(float %y, float %inner, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
  ret float %ret
}

; TODO: Need constrained intrinsic support in m_c_FAdd() and m_FSub to fire.
define float @fsub_fsub_fmf_y_x_x_ebstrict(float %x, float %y) #0 {
; CHECK-LABEL: @fsub_fsub_fmf_y_x_x_ebstrict(
; CHECK-NEXT:    [[INNER:%.*]] = call float @llvm.experimental.constrained.fsub.f32(float [[Y:%.*]], float [[X:%.*]], metadata !"round.tonearest", metadata !"fpexcept.strict") #[[ATTR0]]
; CHECK-NEXT:    [[RET:%.*]] = call reassoc nsz float @llvm.experimental.constrained.fsub.f32(float [[Y]], float [[INNER]], metadata !"round.tonearest", metadata !"fpexcept.strict") #[[ATTR0]]
; CHECK-NEXT:    ret float [[RET]]
;
  %inner = call float @llvm.experimental.constrained.fsub.f32(float %y, float %x, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
  %ret = call nsz reassoc float @llvm.experimental.constrained.fsub.f32(float %y, float %inner, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
  ret float %ret
}

;
; (X + Y) - Y --> X
; TODO: Missing IR matcher support means these won't fire.
;

; Missing nsz and reassoc: must not fire
define float @fadd_fsub_x_y_y_defaultenv(float %x, float %y) #0 {
; CHECK-LABEL: @fadd_fsub_x_y_y_defaultenv(
; CHECK-NEXT:    [[INNER:%.*]] = call float @llvm.experimental.constrained.fadd.f32(float [[X:%.*]], float [[Y:%.*]], metadata !"round.tonearest", metadata !"fpexcept.ignore") #[[ATTR0]]
; CHECK-NEXT:    [[RET:%.*]] = call float @llvm.experimental.constrained.fsub.f32(float [[INNER]], float [[Y]], metadata !"round.tonearest", metadata !"fpexcept.ignore") #[[ATTR0]]
; CHECK-NEXT:    ret float [[RET]]
;
  %inner = call float @llvm.experimental.constrained.fadd.f32(float %x, float %y, metadata !"round.tonearest", metadata !"fpexcept.ignore") #0
  %ret = call float @llvm.experimental.constrained.fsub.f32(float %inner, float %y, metadata !"round.tonearest", metadata !"fpexcept.ignore") #0
  ret float %ret
}

; TODO: Need constrained intrinsic support in m_c_FAdd() and m_FSub to fire.
define float @fadd_fsub_fmf_x_y_y_defaultenv(float %x, float %y) #0 {
; CHECK-LABEL: @fadd_fsub_fmf_x_y_y_defaultenv(
; CHECK-NEXT:    [[INNER:%.*]] = call float @llvm.experimental.constrained.fadd.f32(float [[X:%.*]], float [[Y:%.*]], metadata !"round.tonearest", metadata !"fpexcept.ignore") #[[ATTR0]]
; CHECK-NEXT:    [[RET:%.*]] = call reassoc nsz float @llvm.experimental.constrained.fsub.f32(float [[INNER]], float [[Y]], metadata !"round.tonearest", metadata !"fpexcept.ignore") #[[ATTR0]]
; CHECK-NEXT:    ret float [[RET]]
;
  %inner = call float @llvm.experimental.constrained.fadd.f32(float %x, float %y, metadata !"round.tonearest", metadata !"fpexcept.ignore") #0
  %ret = call nsz reassoc float @llvm.experimental.constrained.fsub.f32(float %inner, float %y, metadata !"round.tonearest", metadata !"fpexcept.ignore") #0
  ret float %ret
}

; The "fpexcept.maytrap" instruction must _not_ be folded into the
; "fpexcept.ignore" instruction. This must not fire.
define float @fadd_fsub_fmf_x_y_y_ebmaytrap_defaultenv(float %x, float %y) #0 {
; CHECK-LABEL: @fadd_fsub_fmf_x_y_y_ebmaytrap_defaultenv(
; CHECK-NEXT:    [[INNER:%.*]] = call float @llvm.experimental.constrained.fadd.f32(float [[X:%.*]], float [[Y:%.*]], metadata !"round.tonearest", metadata !"fpexcept.maytrap") #[[ATTR0]]
; CHECK-NEXT:    [[RET:%.*]] = call reassoc nsz float @llvm.experimental.constrained.fsub.f32(float [[INNER]], float [[Y]], metadata !"round.tonearest", metadata !"fpexcept.ignore") #[[ATTR0]]
; CHECK-NEXT:    ret float [[RET]]
;
  %inner = call float @llvm.experimental.constrained.fadd.f32(float %x, float %y, metadata !"round.tonearest", metadata !"fpexcept.maytrap") #0
  %ret = call nsz reassoc float @llvm.experimental.constrained.fsub.f32(float %inner, float %y, metadata !"round.tonearest", metadata !"fpexcept.ignore") #0
  ret float %ret
}

; Missing nsz and reassoc: must not fire
define float @fadd_fsub_x_y_y_ebmaytrap(float %x, float %y) #0 {
; CHECK-LABEL: @fadd_fsub_x_y_y_ebmaytrap(
; CHECK-NEXT:    [[INNER:%.*]] = call float @llvm.experimental.constrained.fadd.f32(float [[X:%.*]], float [[Y:%.*]], metadata !"round.tonearest", metadata !"fpexcept.maytrap") #[[ATTR0]]
; CHECK-NEXT:    [[RET:%.*]] = call float @llvm.experimental.constrained.fsub.f32(float [[INNER]], float [[Y]], metadata !"round.tonearest", metadata !"fpexcept.maytrap") #[[ATTR0]]
; CHECK-NEXT:    ret float [[RET]]
;
  %inner = call float @llvm.experimental.constrained.fadd.f32(float %x, float %y, metadata !"round.tonearest", metadata !"fpexcept.maytrap") #0
  %ret = call float @llvm.experimental.constrained.fsub.f32(float %inner, float %y, metadata !"round.tonearest", metadata !"fpexcept.maytrap") #0
  ret float %ret
}

; TODO: Need constrained intrinsic support in m_c_FAdd() and m_FSub to fire.
define float @fadd_fsub_fmf_x_y_y_ebmaytrap(float %x, float %y) #0 {
; CHECK-LABEL: @fadd_fsub_fmf_x_y_y_ebmaytrap(
; CHECK-NEXT:    [[INNER:%.*]] = call float @llvm.experimental.constrained.fadd.f32(float [[X:%.*]], float [[Y:%.*]], metadata !"round.tonearest", metadata !"fpexcept.maytrap") #[[ATTR0]]
; CHECK-NEXT:    [[RET:%.*]] = call reassoc nsz float @llvm.experimental.constrained.fsub.f32(float [[INNER]], float [[Y]], metadata !"round.tonearest", metadata !"fpexcept.maytrap") #[[ATTR0]]
; CHECK-NEXT:    ret float [[RET]]
;
  %inner = call float @llvm.experimental.constrained.fadd.f32(float %x, float %y, metadata !"round.tonearest", metadata !"fpexcept.maytrap") #0
  %ret = call nsz reassoc float @llvm.experimental.constrained.fsub.f32(float %inner, float %y, metadata !"round.tonearest", metadata !"fpexcept.maytrap") #0
  ret float %ret
}

; Missing nsz and reassoc: must not fire
define float @fadd_fsub_x_y_y_ebstrict(float %x, float %y) #0 {
; CHECK-LABEL: @fadd_fsub_x_y_y_ebstrict(
; CHECK-NEXT:    [[INNER:%.*]] = call float @llvm.experimental.constrained.fadd.f32(float [[X:%.*]], float [[Y:%.*]], metadata !"round.tonearest", metadata !"fpexcept.strict") #[[ATTR0]]
; CHECK-NEXT:    [[RET:%.*]] = call float @llvm.experimental.constrained.fsub.f32(float [[INNER]], float [[Y]], metadata !"round.tonearest", metadata !"fpexcept.strict") #[[ATTR0]]
; CHECK-NEXT:    ret float [[RET]]
;
  %inner = call float @llvm.experimental.constrained.fadd.f32(float %x, float %y, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
  %ret = call float @llvm.experimental.constrained.fsub.f32(float %inner, float %y, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
  ret float %ret
}

; TODO: Need constrained intrinsic support in m_c_FAdd() and m_FSub to fire.
define float @fadd_fsub_fmf_x_y_y_ebstrict(float %x, float %y) #0 {
; CHECK-LABEL: @fadd_fsub_fmf_x_y_y_ebstrict(
; CHECK-NEXT:    [[INNER:%.*]] = call float @llvm.experimental.constrained.fadd.f32(float [[X:%.*]], float [[Y:%.*]], metadata !"round.tonearest", metadata !"fpexcept.strict") #[[ATTR0]]
; CHECK-NEXT:    [[RET:%.*]] = call reassoc nsz float @llvm.experimental.constrained.fsub.f32(float [[INNER]], float [[Y]], metadata !"round.tonearest", metadata !"fpexcept.strict") #[[ATTR0]]
; CHECK-NEXT:    ret float [[RET]]
;
  %inner = call float @llvm.experimental.constrained.fadd.f32(float %x, float %y, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
  %ret = call nsz reassoc float @llvm.experimental.constrained.fsub.f32(float %inner, float %y, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
  ret float %ret
}

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) #0
declare float @llvm.experimental.constrained.fsub.f32(float, float, metadata, metadata) #0

declare float @llvm.experimental.constrained.sitofp.f32.i32(i32, metadata, metadata) #0

attributes #0 = { strictfp }