llvm/test/Transforms/InstCombine/simplify-demanded-fpclass-fmul.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 6
; RUN: opt -S -passes=instcombine < %s | FileCheck %s

declare nofpclass(nan inf sub norm) float @returns_zero()
declare nofpclass(nan inf nzero sub norm) float @returns_pzero()
declare nofpclass(nan inf pzero sub norm) float @returns_nzero()
declare nofpclass(nan inf zero sub nnorm) float @returns_pnorm()
declare nofpclass(nan inf norm zero) float @returns_sub()
declare nofpclass(nan inf sub zero) float @returns_norm()
declare nofpclass(qnan inf norm sub zero) float @returns_snan()
declare void @use(float)

; No inf result implies no inf inputs.
;
; Does not require special handling of fmul.
define nofpclass(pinf) float @ret_nofpclass_pinf__fmul_unknown_or_pinf(i1 %cond, float %x, float %y) {
; CHECK-LABEL: define nofpclass(pinf) float @ret_nofpclass_pinf__fmul_unknown_or_pinf(
; CHECK-SAME: i1 [[COND:%.*]], float [[X:%.*]], float [[Y:%.*]]) {
; CHECK-NEXT:    [[TMP1:%.*]] = fmul float [[X]], [[Y]]
; CHECK-NEXT:    ret float [[TMP1]]
;
  %x.or.pinf = select i1 %cond, float %x, float 0x7FF0000000000000
  %y.or.pinf = select i1 %cond, float %y, float 0x7FF0000000000000
  %mul = fmul float %x.or.pinf, %y.or.pinf
  ret float %mul
}

; Does not require special handling of fmul.
define nofpclass(ninf) float @ret_nofpclass_pinf__fmul_unknown_or_ninf(i1 %cond, float %x, float %y) {
; CHECK-LABEL: define nofpclass(ninf) float @ret_nofpclass_pinf__fmul_unknown_or_ninf(
; CHECK-SAME: i1 [[COND:%.*]], float [[X:%.*]], float [[Y:%.*]]) {
; CHECK-NEXT:    [[TMP1:%.*]] = fmul float [[X]], [[Y]]
; CHECK-NEXT:    [[MUL:%.*]] = select i1 [[COND]], float [[TMP1]], float 0x7FF0000000000000
; CHECK-NEXT:    ret float [[MUL]]
;
  %x.or.ninf = select i1 %cond, float %x, float 0xFFF0000000000000
  %y.or.ninf = select i1 %cond, float %y, float 0xFFF0000000000000
  %mul = fmul float %x.or.ninf, %y.or.ninf
  ret float %mul
}

define nofpclass(inf) float @ret_nofpclass_inf__fmul_unknown_or_pinf(i1 %cond, float %x, float %y) {
; CHECK-LABEL: define nofpclass(inf) float @ret_nofpclass_inf__fmul_unknown_or_pinf(
; CHECK-SAME: i1 [[COND:%.*]], float [[X:%.*]], float [[Y:%.*]]) {
; CHECK-NEXT:    [[TMP1:%.*]] = fmul float [[X]], [[Y]]
; CHECK-NEXT:    ret float [[TMP1]]
;
  %x.or.pinf = select i1 %cond, float %x, float 0x7FF0000000000000
  %y.or.pinf = select i1 %cond, float %y, float 0x7FF0000000000000
  %mul = fmul float %x.or.pinf, %y.or.pinf
  ret float %mul
}

; -> Only propagate nan %x
define nofpclass(pinf pnorm psub pzero) float @ret_only_negative_results_or_nan_square(float noundef %x) {
; CHECK-LABEL: define nofpclass(pinf pzero psub pnorm) float @ret_only_negative_results_or_nan_square(
; CHECK-SAME: float noundef [[X:%.*]]) {
; CHECK-NEXT:    ret float 0x7FF8000000000000
;
  %mul = fmul float %x, %x
  ret float %mul
}

; -> poison
define nofpclass(pinf pnorm psub pzero nan) float @ret_only_negative_results_square(float noundef %x) {
; CHECK-LABEL: define nofpclass(nan pinf pzero psub pnorm) float @ret_only_negative_results_square(
; CHECK-SAME: float noundef [[X:%.*]]) {
; CHECK-NEXT:    ret float poison
;
  %mul = fmul float %x, %x
  ret float %mul
}

; Cannot fold if undef
define nofpclass(pinf pnorm psub pzero nan) float @ret_only_negative_results_square_maybe_undef(float %x) {
; CHECK-LABEL: define nofpclass(nan pinf pzero psub pnorm) float @ret_only_negative_results_square_maybe_undef(
; CHECK-SAME: float [[X:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = fmul nnan float [[X]], [[X]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul float %x, %x
  ret float %mul
}

define nofpclass(inf norm sub) float @ret_only_zero_or_nan_results_square(float noundef %x) {
; CHECK-LABEL: define nofpclass(inf sub norm) float @ret_only_zero_or_nan_results_square(
; CHECK-SAME: float noundef [[X:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = fmul float [[X]], [[X]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul float %x, %x
  ret float %mul
}

define nofpclass(inf norm sub nan) float @ret_only_zero_results_square(float noundef %x) {
; CHECK-LABEL: define nofpclass(nan inf sub norm) float @ret_only_zero_results_square(
; CHECK-SAME: float noundef [[X:%.*]]) {
; CHECK-NEXT:    ret float 0.000000e+00
;
  %mul = fmul float %x, %x
  ret float %mul
}

define nofpclass(inf norm sub zero) float @ret_only_nan_results_square(float noundef %x) {
; CHECK-LABEL: define nofpclass(inf zero sub norm) float @ret_only_nan_results_square(
; CHECK-SAME: float noundef [[X:%.*]]) {
; CHECK-NEXT:    ret float 0x7FF8000000000000
;
  %mul = fmul float %x, %x
  ret float %mul
}

define nofpclass(inf norm sub zero snan) float @ret_only_qnan_results_square(float noundef %x) {
; CHECK-LABEL: define nofpclass(snan inf zero sub norm) float @ret_only_qnan_results_square(
; CHECK-SAME: float noundef [[X:%.*]]) {
; CHECK-NEXT:    ret float 0x7FF8000000000000
;
  %mul = fmul float %x, %x
  ret float %mul
}

define nofpclass(inf norm sub zero qnan) float @ret_only_snan_results_square(float noundef %x) {
; CHECK-LABEL: define nofpclass(qnan inf zero sub norm) float @ret_only_snan_results_square(
; CHECK-SAME: float noundef [[X:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = fmul float [[X]], [[X]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul float %x, %x
  ret float %mul
}

define nofpclass(norm sub zero) float @ret_only_inf_or_nan_results_square(float noundef %x) {
; CHECK-LABEL: define nofpclass(zero sub norm) float @ret_only_inf_or_nan_results_square(
; CHECK-SAME: float noundef [[X:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = fmul float [[X]], [[X]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul float %x, %x
  ret float %mul
}

define nofpclass(norm sub zero nan) float @ret_only_inf_results_square(float noundef %x) {
; CHECK-LABEL: define nofpclass(nan zero sub norm) float @ret_only_inf_results_square(
; CHECK-SAME: float noundef [[X:%.*]]) {
; CHECK-NEXT:    ret float 0x7FF0000000000000
;
  %mul = fmul float %x, %x
  ret float %mul
}

define nofpclass(ninf norm sub zero) float @ret_only_pinf_or_nan_results_square(float noundef %x) {
; CHECK-LABEL: define nofpclass(ninf zero sub norm) float @ret_only_pinf_or_nan_results_square(
; CHECK-SAME: float noundef [[X:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = fmul float [[X]], [[X]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul float %x, %x
  ret float %mul
}

define nofpclass(ninf norm sub zero nan) float @ret_only_pinf_results_square(float noundef %x) {
; CHECK-LABEL: define nofpclass(nan ninf zero sub norm) float @ret_only_pinf_results_square(
; CHECK-SAME: float noundef [[X:%.*]]) {
; CHECK-NEXT:    ret float 0x7FF0000000000000
;
  %mul = fmul float %x, %x
  ret float %mul
}

; -> poison
define nofpclass(pinf norm sub zero nan) float @ret_only_ninf_results_square(float noundef %x) {
; CHECK-LABEL: define nofpclass(nan pinf zero sub norm) float @ret_only_ninf_results_square(
; CHECK-SAME: float noundef [[X:%.*]]) {
; CHECK-NEXT:    ret float poison
;
  %mul = fmul float %x, %x
  ret float %mul
}

define nofpclass(inf) float @ret_src_must_be_zero_square(float noundef nofpclass(nan inf norm sub) %x) {
; CHECK-LABEL: define nofpclass(inf) float @ret_src_must_be_zero_square(
; CHECK-SAME: float noundef nofpclass(nan inf sub norm) [[X:%.*]]) {
; CHECK-NEXT:    ret float 0.000000e+00
;
  %mul = fmul float %x, %x
  ret float %mul
}

define nofpclass(inf) float @ret_src_must_be_pzero(float noundef nofpclass(nan inf norm sub nzero) %x) {
; CHECK-LABEL: define nofpclass(inf) float @ret_src_must_be_pzero(
; CHECK-SAME: float noundef nofpclass(nan inf nzero sub norm) [[X:%.*]]) {
; CHECK-NEXT:    ret float 0.000000e+00
;
  %mul = fmul float %x, %x
  ret float %mul
}

define nofpclass(inf) float @ret_src_must_be_nzero(float noundef nofpclass(nan inf norm sub pzero) %x) {
; CHECK-LABEL: define nofpclass(inf) float @ret_src_must_be_nzero(
; CHECK-SAME: float noundef nofpclass(nan inf pzero sub norm) [[X:%.*]]) {
; CHECK-NEXT:    ret float 0.000000e+00
;
  %mul = fmul float %x, %x
  ret float %mul
}

define nofpclass(inf) float @ret_src_must_be_zero_or_nan_square(float noundef nofpclass(inf norm sub) %x) {
; CHECK-LABEL: define nofpclass(inf) float @ret_src_must_be_zero_or_nan_square(
; CHECK-SAME: float noundef nofpclass(inf sub norm) [[X:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = call float @llvm.fabs.f32(float [[X]])
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul float %x, %x
  ret float %mul
}

define nofpclass(inf) float @ret_src_must_be_zero_or_nan_square__preserve_flags(float noundef nofpclass(inf norm sub) %x) {
; CHECK-LABEL: define nofpclass(inf) float @ret_src_must_be_zero_or_nan_square__preserve_flags(
; CHECK-SAME: float noundef nofpclass(inf sub norm) [[X:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = call contract float @llvm.fabs.f32(float [[X]])
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul contract float %x, %x
  ret float %mul
}

define nofpclass(inf) float @ret_src_must_be_zero_or_nan_square_other_use_input0(float noundef nofpclass(inf norm sub) %x) {
; CHECK-LABEL: define nofpclass(inf) float @ret_src_must_be_zero_or_nan_square_other_use_input0(
; CHECK-SAME: float noundef nofpclass(inf sub norm) [[X:%.*]]) {
; CHECK-NEXT:    call void @use(float [[X]])
; CHECK-NEXT:    [[MUL:%.*]] = call float @llvm.fabs.f32(float [[X]])
; CHECK-NEXT:    ret float [[MUL]]
;
  call void @use(float %x)
  %mul = fmul float %x, %x
  ret float %mul
}

define nofpclass(inf) float @ret_src_must_be_zero_or_nan_square_other_use_input1(float noundef nofpclass(inf norm sub) %x) {
; CHECK-LABEL: define nofpclass(inf) float @ret_src_must_be_zero_or_nan_square_other_use_input1(
; CHECK-SAME: float noundef nofpclass(inf sub norm) [[X:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = call float @llvm.fabs.f32(float [[X]])
; CHECK-NEXT:    call void @use(float [[X]])
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul float %x, %x
  call void @use(float %x)
  ret float %mul
}

define nofpclass(ninf norm sub zero) float @pinf_result_demands__square__pnorm_source(i1 %cond, float nofpclass(nan) %not.nan) {
; CHECK-LABEL: define nofpclass(ninf zero sub norm) float @pinf_result_demands__square__pnorm_source(
; CHECK-SAME: i1 [[COND:%.*]], float nofpclass(nan) [[NOT_NAN:%.*]]) {
; CHECK-NEXT:    [[PNORM:%.*]] = call float @returns_pnorm()
; CHECK-NEXT:    [[SELECT:%.*]] = select i1 [[COND]], float [[PNORM]], float [[NOT_NAN]]
; CHECK-NEXT:    [[MUL:%.*]] = fmul float [[SELECT]], [[SELECT]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %pnorm = call float @returns_pnorm()
  %select = select i1 %cond, float %pnorm, float %not.nan
  %mul = fmul float %select, %select
  ret float %mul
}

define nofpclass(pinf) float @ret_nofpclass_pinf__fmul_square_unknown_or_pinf(i1 %cond, float %x) {
; CHECK-LABEL: define nofpclass(pinf) float @ret_nofpclass_pinf__fmul_square_unknown_or_pinf(
; CHECK-SAME: i1 [[COND:%.*]], float [[X:%.*]]) {
; CHECK-NEXT:    [[X_OR_PINF:%.*]] = select i1 [[COND]], float [[X]], float 0x7FF0000000000000
; CHECK-NEXT:    [[MUL:%.*]] = fmul float [[X_OR_PINF]], [[X_OR_PINF]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %x.or.pinf = select i1 %cond, float %x, float 0x7FF0000000000000
  %mul = fmul float %x.or.pinf, %x.or.pinf
  ret float %mul
}

define nofpclass(pinf) float @ret_nofpclass_pinf__fmul_square_unknown_or_pinf__other_use0(i1 %cond, float %x) {
; CHECK-LABEL: define nofpclass(pinf) float @ret_nofpclass_pinf__fmul_square_unknown_or_pinf__other_use0(
; CHECK-SAME: i1 [[COND:%.*]], float [[X:%.*]]) {
; CHECK-NEXT:    [[X_OR_PINF:%.*]] = select i1 [[COND]], float [[X]], float 0x7FF0000000000000
; CHECK-NEXT:    call void @use(float [[X_OR_PINF]])
; CHECK-NEXT:    [[MUL:%.*]] = fmul float [[X_OR_PINF]], [[X_OR_PINF]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %x.or.pinf = select i1 %cond, float %x, float 0x7FF0000000000000
  call void @use(float %x.or.pinf)
  %mul = fmul float %x.or.pinf, %x.or.pinf
  ret float %mul
}

define nofpclass(pinf) float @ret_nofpclass_pinf__fmul_square_unknown_or_pinf__other_use1(i1 %cond, float %x) {
; CHECK-LABEL: define nofpclass(pinf) float @ret_nofpclass_pinf__fmul_square_unknown_or_pinf__other_use1(
; CHECK-SAME: i1 [[COND:%.*]], float [[X:%.*]]) {
; CHECK-NEXT:    [[X_OR_PINF:%.*]] = select i1 [[COND]], float [[X]], float 0x7FF0000000000000
; CHECK-NEXT:    [[MUL:%.*]] = fmul float [[X_OR_PINF]], [[X_OR_PINF]]
; CHECK-NEXT:    call void @use(float [[X_OR_PINF]])
; CHECK-NEXT:    ret float [[MUL]]
;
  %x.or.pinf = select i1 %cond, float %x, float 0x7FF0000000000000
  %mul = fmul float %x.or.pinf, %x.or.pinf
  call void @use(float %x.or.pinf)
  ret float %mul
}

; -> qnan
define nofpclass(nzero) float @ret_src_must_be_nan_square(float noundef nofpclass(inf norm sub zero) %x) {
; CHECK-LABEL: define nofpclass(nzero) float @ret_src_must_be_nan_square(
; CHECK-SAME: float noundef nofpclass(inf zero sub norm) [[X:%.*]]) {
; CHECK-NEXT:    ret float 0x7FF8000000000000
;
  %mul = fmul float %x, %x
  ret float %mul
}

; -> qnan
define nofpclass(pinf pnorm psub pzero) float @ret_only_negative_results_or_nan_fabs_xy(float %x, float nofpclass(ninf nnorm nsub nzero) %y.pos.or.nan) {
; CHECK-LABEL: define nofpclass(pinf pzero psub pnorm) float @ret_only_negative_results_or_nan_fabs_xy(
; CHECK-SAME: float [[X:%.*]], float nofpclass(ninf nzero nsub nnorm) [[Y_POS_OR_NAN:%.*]]) {
; CHECK-NEXT:    ret float 0x7FF8000000000000
;
  %x.fabs = call float @llvm.fabs.f32(float %x)
  %mul = fmul float %x.fabs, %y.pos.or.nan
  ret float %mul
}

; -> poison
define nofpclass(pinf pnorm psub pzero nan) float @ret_only_negative_results_fabs_xy(float %x,float nofpclass(ninf nnorm nsub nzero) %y.pos.or.nan) {
; CHECK-LABEL: define nofpclass(nan pinf pzero psub pnorm) float @ret_only_negative_results_fabs_xy(
; CHECK-SAME: float [[X:%.*]], float nofpclass(ninf nzero nsub nnorm) [[Y_POS_OR_NAN:%.*]]) {
; CHECK-NEXT:    ret float poison
;
  %x.fabs = call float @llvm.fabs.f32(float %x)
  %mul = fmul float %x.fabs, %y.pos.or.nan
  ret float %mul
}

define nofpclass(zero) float @ret_only_zero_results__rhs_non0_const(float %x) {
; CHECK-LABEL: define nofpclass(zero) float @ret_only_zero_results__rhs_non0_const(
; CHECK-SAME: float [[X:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = fmul float [[X]], 2.000000e+00
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul float %x, 2.0
  ret float %mul
}

define nofpclass(zero) float @ret_only_zero_results__lhs_known_nonzero_nonsub(float nofpclass(zero sub) %x, float %y) {
; CHECK-LABEL: define nofpclass(zero) float @ret_only_zero_results__lhs_known_nonzero_nonsub(
; CHECK-SAME: float nofpclass(zero sub) [[X:%.*]], float [[Y:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = fmul float [[X]], [[Y]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul float %x, %y
  ret float %mul
}

define nofpclass(zero) float @ret_only_zero_results__lhs_known_nonzero_nonsub_daz(float nofpclass(zero sub) %x, float %y) #0 {
; CHECK-LABEL: define nofpclass(zero) float @ret_only_zero_results__lhs_known_nonzero_nonsub_daz(
; CHECK-SAME: float nofpclass(zero sub) [[X:%.*]], float [[Y:%.*]]) #[[ATTR0:[0-9]+]] {
; CHECK-NEXT:    [[MUL:%.*]] = fmul float [[X]], [[Y]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul float %x, %y
  ret float %mul
}

define nofpclass(zero) float @ret_only_zero_results__lhs_known_nonzero_nonsub_dynamic(float nofpclass(zero sub) %x, float %y) #1 {
; CHECK-LABEL: define nofpclass(zero) float @ret_only_zero_results__lhs_known_nonzero_nonsub_dynamic(
; CHECK-SAME: float nofpclass(zero sub) [[X:%.*]], float [[Y:%.*]]) #[[ATTR1:[0-9]+]] {
; CHECK-NEXT:    [[MUL:%.*]] = fmul float [[X]], [[Y]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul float %x, %y
  ret float %mul
}

define nofpclass(zero) float @ret_only_zero_results__lhs_known_nonzero(float nofpclass(zero) %x, float %y) {
; CHECK-LABEL: define nofpclass(zero) float @ret_only_zero_results__lhs_known_nonzero(
; CHECK-SAME: float nofpclass(zero) [[X:%.*]], float [[Y:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = fmul float [[X]], [[Y]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul float %x, %y
  ret float %mul
}

define nofpclass(zero) float @ret_only_zero_results__lhs_known_nonzero_daz(float nofpclass(zero) %x, float %y) #1 {
; CHECK-LABEL: define nofpclass(zero) float @ret_only_zero_results__lhs_known_nonzero_daz(
; CHECK-SAME: float nofpclass(zero) [[X:%.*]], float [[Y:%.*]]) #[[ATTR1]] {
; CHECK-NEXT:    [[MUL:%.*]] = fmul float [[X]], [[Y]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul float %x, %y
  ret float %mul
}

define nofpclass(inf) float @ret_only_inf_results__lhs_known_non_inf(i1 %cond, float %x, float nofpclass(inf) %y) {
; CHECK-LABEL: define nofpclass(inf) float @ret_only_inf_results__lhs_known_non_inf(
; CHECK-SAME: i1 [[COND:%.*]], float [[X:%.*]], float nofpclass(inf) [[Y:%.*]]) {
; CHECK-NEXT:    [[X_OR_PINF:%.*]] = select i1 [[COND]], float [[X]], float 0x7FF0000000000000
; CHECK-NEXT:    [[MUL:%.*]] = fmul float [[X_OR_PINF]], [[Y]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %x.or.pinf = select i1 %cond, float %x, float 0x7FF0000000000000
  %mul = fmul float %x.or.pinf, %y
  ret float %mul
}

define nofpclass(inf) float @ret_no_inf_results__rhs_known_non_inf(i1 %cond, float %x, float nofpclass(inf) %y) {
; CHECK-LABEL: define nofpclass(inf) float @ret_no_inf_results__rhs_known_non_inf(
; CHECK-SAME: i1 [[COND:%.*]], float [[X:%.*]], float nofpclass(inf) [[Y:%.*]]) {
; CHECK-NEXT:    [[Y_OR_PINF:%.*]] = select i1 [[COND]], float [[Y]], float 0x7FF0000000000000
; CHECK-NEXT:    [[MUL:%.*]] = fmul float [[X]], [[Y_OR_PINF]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %y.or.pinf = select i1 %cond, float %y, float 0x7FF0000000000000
  %mul = fmul float %x, %y.or.pinf
  ret float %mul
}

; Do nothing, this could still be -inf
define nofpclass(ninf nan) float @ret_no_ninf_or_nan_results__lhs_known_non_inf(i1 %cond, float %x, float nofpclass(inf) %y) {
; CHECK-LABEL: define nofpclass(nan ninf) float @ret_no_ninf_or_nan_results__lhs_known_non_inf(
; CHECK-SAME: i1 [[COND:%.*]], float [[X:%.*]], float nofpclass(inf) [[Y:%.*]]) {
; CHECK-NEXT:    [[X_OR_PINF:%.*]] = select i1 [[COND]], float [[X]], float 0x7FF0000000000000
; CHECK-NEXT:    [[MUL:%.*]] = fmul nnan float [[X_OR_PINF]], [[Y]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %x.or.pinf = select i1 %cond, float %x, float 0x7FF0000000000000
  %mul = fmul float %x.or.pinf, %y
  ret float %mul
}

; Do nothing, this could still be -inf
define nofpclass(pinf nan) float @ret_no_pinf_or_nan_results__lhs_known_non_inf(i1 %cond, float %x, float nofpclass(inf) %y) {
; CHECK-LABEL: define nofpclass(nan pinf) float @ret_no_pinf_or_nan_results__lhs_known_non_inf(
; CHECK-SAME: i1 [[COND:%.*]], float [[X:%.*]], float nofpclass(inf) [[Y:%.*]]) {
; CHECK-NEXT:    [[X_OR_PINF:%.*]] = select i1 [[COND]], float [[X]], float 0x7FF0000000000000
; CHECK-NEXT:    [[MUL:%.*]] = fmul nnan float [[X_OR_PINF]], [[Y]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %x.or.pinf = select i1 %cond, float %x, float 0x7FF0000000000000
  %mul = fmul float %x.or.pinf, %y
  ret float %mul
}

; fold to fmul
define nofpclass(inf nan) float @ret_no_inf_or_nan_results__lhs_known_non_inf(i1 %cond, float %x, float nofpclass(inf) %y) {
; CHECK-LABEL: define nofpclass(nan inf) float @ret_no_inf_or_nan_results__lhs_known_non_inf(
; CHECK-SAME: i1 [[COND:%.*]], float [[X:%.*]], float nofpclass(inf) [[Y:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = fmul nnan ninf float [[X]], [[Y]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %x.or.pinf = select i1 %cond, float %x, float 0x7FF0000000000000
  %mul = fmul float %x.or.pinf, %y
  ret float %mul
}

; fold to fmul
define nofpclass(inf nan) float @ret_no_inf_or_nan_results__rhs_known_non_inf(i1 %cond, float %x, float nofpclass(inf) %y) {
; CHECK-LABEL: define nofpclass(nan inf) float @ret_no_inf_or_nan_results__rhs_known_non_inf(
; CHECK-SAME: i1 [[COND:%.*]], float [[X:%.*]], float nofpclass(inf) [[Y:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = fmul nnan ninf float [[X]], [[Y]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %y.or.pinf = select i1 %cond, float %y, float 0x7FF0000000000000
  %mul = fmul float %x, %y.or.pinf
  ret float %mul
}

; -> nan
define nofpclass(ninf nnorm nsub nzero) float @ret_only_positive_results_or_nan_known_negative_fmul(float nofpclass(ninf nnorm nsub nzero) %only.positive.or.nan, float nofpclass(pinf pnorm psub pzero) %only.negative.or.nan) {
; CHECK-LABEL: define nofpclass(ninf nzero nsub nnorm) float @ret_only_positive_results_or_nan_known_negative_fmul(
; CHECK-SAME: float nofpclass(ninf nzero nsub nnorm) [[ONLY_POSITIVE_OR_NAN:%.*]], float nofpclass(pinf pzero psub pnorm) [[ONLY_NEGATIVE_OR_NAN:%.*]]) {
; CHECK-NEXT:    ret float 0x7FF8000000000000
;
  %mul = fmul float %only.negative.or.nan, %only.positive.or.nan
  ret float %mul
}

; -> poison
define nofpclass(ninf nnorm nsub nzero nan) float @ret_only_positive_results_known_negative_fmul(float nofpclass(ninf nnorm nsub nzero) %only.positive.or.nan, float nofpclass(pinf pnorm psub pzero) %only.negative.or.nan) {
; CHECK-LABEL: define nofpclass(nan ninf nzero nsub nnorm) float @ret_only_positive_results_known_negative_fmul(
; CHECK-SAME: float nofpclass(ninf nzero nsub nnorm) [[ONLY_POSITIVE_OR_NAN:%.*]], float nofpclass(pinf pzero psub pnorm) [[ONLY_NEGATIVE_OR_NAN:%.*]]) {
; CHECK-NEXT:    ret float poison
;
  %mul = fmul float %only.negative.or.nan, %only.positive.or.nan
  ret float %mul
}

; missing nnan rhs
define nofpclass(nsub) float @ret__known_zero_or_nan__fmul__not_inf(float nofpclass(inf sub norm) %zero.or.nan, float nofpclass(inf) %not.inf) {
; CHECK-LABEL: define nofpclass(nsub) float @ret__known_zero_or_nan__fmul__not_inf(
; CHECK-SAME: float nofpclass(inf sub norm) [[ZERO_OR_NAN:%.*]], float nofpclass(inf) [[NOT_INF:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = fmul ninf float [[ZERO_OR_NAN]], [[NOT_INF]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul float %zero.or.nan, %not.inf
  ret float %mul
}

; Needs to be pzero to replace with copysign
define nofpclass(nsub) float @ret__known_zero_or_nan__fmul__not_inf_or_nan(float nofpclass(inf sub norm) %zero.or.nan, float nofpclass(inf nan) %not.inf.or.nan) {
; CHECK-LABEL: define nofpclass(nsub) float @ret__known_zero_or_nan__fmul__not_inf_or_nan(
; CHECK-SAME: float nofpclass(inf sub norm) [[ZERO_OR_NAN:%.*]], float nofpclass(nan inf) [[NOT_INF_OR_NAN:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = fmul ninf float [[ZERO_OR_NAN]], [[NOT_INF_OR_NAN]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul float %zero.or.nan, %not.inf.or.nan
  ret float %mul
}

; Needs to be pzero to replace with copysign
define nofpclass(nsub) float @ret__not_inf_or_nan__fmul__known_zero_or_nan(float nofpclass(inf nan) %not.inf.or.nan, float nofpclass(inf sub norm) %zero.or.nan) {
; CHECK-LABEL: define nofpclass(nsub) float @ret__not_inf_or_nan__fmul__known_zero_or_nan(
; CHECK-SAME: float nofpclass(nan inf) [[NOT_INF_OR_NAN:%.*]], float nofpclass(inf sub norm) [[ZERO_OR_NAN:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = fmul ninf float [[NOT_INF_OR_NAN]], [[ZERO_OR_NAN]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul float %not.inf.or.nan, %zero.or.nan
  ret float %mul
}

; -> copysign
define nofpclass(nsub) float @ret__known_pzero_or_nan__fmul__not_inf_or_nan(float nofpclass(inf sub norm nzero) %pzero.or.nan, float nofpclass(inf nan) %not.inf.or.nan) {
; CHECK-LABEL: define nofpclass(nsub) float @ret__known_pzero_or_nan__fmul__not_inf_or_nan(
; CHECK-SAME: float nofpclass(inf nzero sub norm) [[PZERO_OR_NAN:%.*]], float nofpclass(nan inf) [[NOT_INF_OR_NAN:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = call float @llvm.copysign.f32(float [[PZERO_OR_NAN]], float [[NOT_INF_OR_NAN]])
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul float %pzero.or.nan, %not.inf.or.nan
  ret float %mul
}

define nofpclass(nsub) float @ret__known_pzero_or_nan__fmul__not_inf_or_nan__insert_point(float nofpclass(inf sub norm nzero) %pzero.or.nan, float nofpclass(inf nan) %not.inf.or.nan) {
; CHECK-LABEL: define nofpclass(nsub) float @ret__known_pzero_or_nan__fmul__not_inf_or_nan__insert_point(
; CHECK-SAME: float nofpclass(inf nzero sub norm) [[PZERO_OR_NAN:%.*]], float nofpclass(nan inf) [[NOT_INF_OR_NAN:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = call float @llvm.copysign.f32(float [[PZERO_OR_NAN]], float [[NOT_INF_OR_NAN]])
; CHECK-NEXT:    [[BARRIER:%.*]] = call float @llvm.arithmetic.fence.f32(float [[MUL]])
; CHECK-NEXT:    ret float [[BARRIER]]
;
  %mul = fmul float %pzero.or.nan, %not.inf.or.nan
  %barrier = call float @llvm.arithmetic.fence.f32(float %mul)
  ret float %barrier
}

; missing nnan lhs
define nofpclass(nsub) float @ret__not_inf__fmul__known_pzero_or_nan(float nofpclass(inf) %not.inf, float nofpclass(inf sub norm nzero) %pzero.or.nan) {
; CHECK-LABEL: define nofpclass(nsub) float @ret__not_inf__fmul__known_pzero_or_nan(
; CHECK-SAME: float nofpclass(inf) [[NOT_INF:%.*]], float nofpclass(inf nzero sub norm) [[PZERO_OR_NAN:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = fmul ninf float [[NOT_INF]], [[PZERO_OR_NAN]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul float %not.inf, %pzero.or.nan
  ret float %mul
}

; -> copysign
define nofpclass(nsub) float @ret__not_inf_or_nan__fmul__known_pzero_or_nan(float nofpclass(inf nan) %not.inf.or.nan, float nofpclass(inf sub norm nzero) %pzero.or.nan) {
; CHECK-LABEL: define nofpclass(nsub) float @ret__not_inf_or_nan__fmul__known_pzero_or_nan(
; CHECK-SAME: float nofpclass(nan inf) [[NOT_INF_OR_NAN:%.*]], float nofpclass(inf nzero sub norm) [[PZERO_OR_NAN:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = call float @llvm.copysign.f32(float [[PZERO_OR_NAN]], float [[NOT_INF_OR_NAN]])
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul float %not.inf.or.nan, %pzero.or.nan
  ret float %mul
}

define nofpclass(nsub) float @ret__not_inf_or_nan__fmul__known_pzero_or_nan__insert_point(float nofpclass(inf nan) %not.inf.or.nan, float nofpclass(inf sub norm nzero) %pzero.or.nan) {
; CHECK-LABEL: define nofpclass(nsub) float @ret__not_inf_or_nan__fmul__known_pzero_or_nan__insert_point(
; CHECK-SAME: float nofpclass(nan inf) [[NOT_INF_OR_NAN:%.*]], float nofpclass(inf nzero sub norm) [[PZERO_OR_NAN:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = call float @llvm.copysign.f32(float [[PZERO_OR_NAN]], float [[NOT_INF_OR_NAN]])
; CHECK-NEXT:    [[BARRIER:%.*]] = call float @llvm.arithmetic.fence.f32(float [[MUL]])
; CHECK-NEXT:    ret float [[BARRIER]]
;
  %mul = fmul float %not.inf.or.nan, %pzero.or.nan
  %barrier = call float @llvm.arithmetic.fence.f32(float %mul)
  ret float %barrier
}

; Missing no-nan on RHS to turn into fneg
define nofpclass(nsub) float @ret__known_inf_or_nan__fmul__known_negative_non0_or_nan(float nofpclass(zero sub norm) %inf.or.nan, float nofpclass(zero pinf pnorm psub) %negative.non0.or.nan) {
; CHECK-LABEL: define nofpclass(nsub) float @ret__known_inf_or_nan__fmul__known_negative_non0_or_nan(
; CHECK-SAME: float nofpclass(zero sub norm) [[INF_OR_NAN:%.*]], float nofpclass(pinf zero psub pnorm) [[NEGATIVE_NON0_OR_NAN:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = fmul float [[INF_OR_NAN]], [[NEGATIVE_NON0_OR_NAN]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul float %inf.or.nan, %negative.non0.or.nan
  ret float %mul
}

; Missing no-nan on LHS to turn into fneg
define nofpclass(nsub) float @ret__known_negative_non0_or_nan__fmul__known_inf_or_nan(float nofpclass(zero pinf pnorm psub) %negative.non0.or.nan, float nofpclass(zero sub norm) %inf.or.nan) {
; CHECK-LABEL: define nofpclass(nsub) float @ret__known_negative_non0_or_nan__fmul__known_inf_or_nan(
; CHECK-SAME: float nofpclass(pinf zero psub pnorm) [[NEGATIVE_NON0_OR_NAN:%.*]], float nofpclass(zero sub norm) [[INF_OR_NAN:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = fmul float [[NEGATIVE_NON0_OR_NAN]], [[INF_OR_NAN]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul float %negative.non0.or.nan, %inf.or.nan
  ret float %mul
}

; -> fneg
define nofpclass(nsub) float @ret__known_inf_or_nan__fmul__known_negative_non0(float nofpclass(zero sub norm) %inf.or.nan, float nofpclass(nan zero pinf pnorm psub) %negative.non0) {
; CHECK-LABEL: define nofpclass(nsub) float @ret__known_inf_or_nan__fmul__known_negative_non0(
; CHECK-SAME: float nofpclass(zero sub norm) [[INF_OR_NAN:%.*]], float nofpclass(nan pinf zero psub pnorm) [[NEGATIVE_NON0:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = fneg float [[INF_OR_NAN]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul float %inf.or.nan, %negative.non0
  ret float %mul
}

define nofpclass(nsub) float @ret__known_inf_or_nan__fmul__known_negative_non0__insert_point(float nofpclass(zero sub norm) %inf.or.nan, float nofpclass(nan zero pinf pnorm psub) %negative.non0) {
; CHECK-LABEL: define nofpclass(nsub) float @ret__known_inf_or_nan__fmul__known_negative_non0__insert_point(
; CHECK-SAME: float nofpclass(zero sub norm) [[INF_OR_NAN:%.*]], float nofpclass(nan pinf zero psub pnorm) [[NEGATIVE_NON0:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = fneg float [[INF_OR_NAN]]
; CHECK-NEXT:    [[BARRIER:%.*]] = call float @llvm.arithmetic.fence.f32(float [[MUL]])
; CHECK-NEXT:    ret float [[BARRIER]]
;
  %mul = fmul float %inf.or.nan, %negative.non0
  %barrier = call float @llvm.arithmetic.fence.f32(float %mul)
  ret float %barrier
}

; -> fneg
define nofpclass(nsub) float @ret__known_negative_non0__fmul__known_inf_or_nan(float nofpclass(nan zero pinf pnorm psub) %negative.non0, float nofpclass(zero sub norm) %inf.or.nan) {
; CHECK-LABEL: define nofpclass(nsub) float @ret__known_negative_non0__fmul__known_inf_or_nan(
; CHECK-SAME: float nofpclass(nan pinf zero psub pnorm) [[NEGATIVE_NON0:%.*]], float nofpclass(zero sub norm) [[INF_OR_NAN:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = fneg float [[INF_OR_NAN]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul float %negative.non0, %inf.or.nan
  ret float %mul
}

define nofpclass(nsub) float @ret__known_negative_non0__fmul__known_inf_or_nan__insert_pt(float nofpclass(nan zero pinf pnorm psub) %negative.non0, float nofpclass(zero sub norm) %inf.or.nan) {
; CHECK-LABEL: define nofpclass(nsub) float @ret__known_negative_non0__fmul__known_inf_or_nan__insert_pt(
; CHECK-SAME: float nofpclass(nan pinf zero psub pnorm) [[NEGATIVE_NON0:%.*]], float nofpclass(zero sub norm) [[INF_OR_NAN:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = fneg float [[INF_OR_NAN]]
; CHECK-NEXT:    [[BARRIER:%.*]] = call float @llvm.arithmetic.fence.f32(float [[MUL]])
; CHECK-NEXT:    ret float [[BARRIER]]
;
  %mul = fmul float %negative.non0, %inf.or.nan
  %barrier = call float @llvm.arithmetic.fence.f32(float %mul)
  ret float %barrier
}

; Cannot fold to fneg due to possible nsub input
define nofpclass(nsub) float @ret__known_inf_or_nan__fmul__known_negative_non0__daz(float nofpclass(zero sub norm) %inf.or.nan, float nofpclass(nan zero pinf pnorm psub) %negative.non0) #1 {
; CHECK-LABEL: define nofpclass(nsub) float @ret__known_inf_or_nan__fmul__known_negative_non0__daz(
; CHECK-SAME: float nofpclass(zero sub norm) [[INF_OR_NAN:%.*]], float nofpclass(nan pinf zero psub pnorm) [[NEGATIVE_NON0:%.*]]) #[[ATTR1]] {
; CHECK-NEXT:    [[MUL:%.*]] = fmul float [[INF_OR_NAN]], [[NEGATIVE_NON0]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul float %inf.or.nan, %negative.non0
  ret float %mul
}

; Cannot fold to fneg due to possible nsub input
define nofpclass(nsub) float @ret__known_negative_non0__fmul__known_inf_or_nan__daz(float nofpclass(nan zero pinf pnorm psub) %negative.non0, float nofpclass(zero sub norm) %inf.or.nan) #1 {
; CHECK-LABEL: define nofpclass(nsub) float @ret__known_negative_non0__fmul__known_inf_or_nan__daz(
; CHECK-SAME: float nofpclass(nan pinf zero psub pnorm) [[NEGATIVE_NON0:%.*]], float nofpclass(zero sub norm) [[INF_OR_NAN:%.*]]) #[[ATTR1]] {
; CHECK-NEXT:    [[MUL:%.*]] = fmul float [[NEGATIVE_NON0]], [[INF_OR_NAN]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul float %negative.non0, %inf.or.nan
  ret float %mul
}

; -> fneg
define nofpclass(nsub) float @ret__known_inf_or_nan__fmul__known_negative_nonlogical0__daz(float nofpclass(zero sub norm) %inf.or.nan, float nofpclass(nan zero pinf pnorm sub) %negative.nonlogical0) #1 {
; CHECK-LABEL: define nofpclass(nsub) float @ret__known_inf_or_nan__fmul__known_negative_nonlogical0__daz(
; CHECK-SAME: float nofpclass(zero sub norm) [[INF_OR_NAN:%.*]], float nofpclass(nan pinf zero sub pnorm) [[NEGATIVE_NONLOGICAL0:%.*]]) #[[ATTR1]] {
; CHECK-NEXT:    [[MUL:%.*]] = fneg float [[INF_OR_NAN]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul float %inf.or.nan, %negative.nonlogical0
  ret float %mul
}

; -> fneg
define nofpclass(nsub) float @ret__known_negative_nonlogical0__fmul__known_inf_or_nan__daz(float nofpclass(nan zero pinf pnorm sub) %negative.nonlogical0, float nofpclass(zero sub norm) %inf.or.nan) #1 {
; CHECK-LABEL: define nofpclass(nsub) float @ret__known_negative_nonlogical0__fmul__known_inf_or_nan__daz(
; CHECK-SAME: float nofpclass(nan pinf zero sub pnorm) [[NEGATIVE_NONLOGICAL0:%.*]], float nofpclass(zero sub norm) [[INF_OR_NAN:%.*]]) #[[ATTR1]] {
; CHECK-NEXT:    [[MUL:%.*]] = fneg float [[INF_OR_NAN]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul float %negative.nonlogical0, %inf.or.nan
  ret float %mul
}

; Should be able to fold to copysign, helped by the lack of nan results.
define nofpclass(nan) float @ret_no_nan_result__known_pzero__fmul__not_inf(float nofpclass(inf sub norm nzero) %pzero.or.nan, float nofpclass(inf nan) %not.inf.or.nan) {
; CHECK-LABEL: define nofpclass(nan) float @ret_no_nan_result__known_pzero__fmul__not_inf(
; CHECK-SAME: float nofpclass(inf nzero sub norm) [[PZERO_OR_NAN:%.*]], float nofpclass(nan inf) [[NOT_INF_OR_NAN:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = call float @llvm.copysign.f32(float 0.000000e+00, float [[NOT_INF_OR_NAN]])
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul float %pzero.or.nan, %not.inf.or.nan
  ret float %mul
}

; Should be able to fold to copysign, helped by the lack of nan results.
define nofpclass(nan) float @ret_no_nan_result__not_inf_or_nan__fmul__known_pzero_or_nan(float nofpclass(inf) %not.inf.or.nan, float nofpclass(inf sub norm nzero) %pzero.or.nan) {
; CHECK-LABEL: define nofpclass(nan) float @ret_no_nan_result__not_inf_or_nan__fmul__known_pzero_or_nan(
; CHECK-SAME: float nofpclass(inf) [[NOT_INF_OR_NAN:%.*]], float nofpclass(inf nzero sub norm) [[PZERO_OR_NAN:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = call ninf float @llvm.copysign.f32(float 0.000000e+00, float [[NOT_INF_OR_NAN]])
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul float %not.inf.or.nan, %pzero.or.nan
  ret float %mul
}

; -> fneg, with help of no nan results
define nofpclass(nan) float @ret_no_nan_result__known_inf_or_nan__fmul__known_negative_non0(float nofpclass(zero sub norm) %inf.or.nan, float nofpclass(zero pinf pnorm psub) %negative.non0) {
; CHECK-LABEL: define nofpclass(nan) float @ret_no_nan_result__known_inf_or_nan__fmul__known_negative_non0(
; CHECK-SAME: float nofpclass(zero sub norm) [[INF_OR_NAN:%.*]], float nofpclass(pinf zero psub pnorm) [[NEGATIVE_NON0:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = fneg float [[INF_OR_NAN]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul float %inf.or.nan, %negative.non0
  ret float %mul
}

; -> fneg, with help of no nan results
define nofpclass(nan) float @ret_no_nan_result__known_negative_non0__fmul__known_inf_or_nan(float nofpclass(zero pinf pnorm psub) %negative.non0, float nofpclass(zero sub norm) %inf.or.nan) {
; CHECK-LABEL: define nofpclass(nan) float @ret_no_nan_result__known_negative_non0__fmul__known_inf_or_nan(
; CHECK-SAME: float nofpclass(pinf zero psub pnorm) [[NEGATIVE_NON0:%.*]], float nofpclass(zero sub norm) [[INF_OR_NAN:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = fneg float [[INF_OR_NAN]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul float %negative.non0, %inf.or.nan
  ret float %mul
}

; -> copysign, take no-infs-no-nans from invalid return
define nofpclass(inf nan) float @ret_noinf_nonan__known_pzero_or_nan__fmul__not_inf_or_nan(float nofpclass(inf sub norm nzero) %pzero.or.nan, float %unknown) {
; CHECK-LABEL: define nofpclass(nan inf) float @ret_noinf_nonan__known_pzero_or_nan__fmul__not_inf_or_nan(
; CHECK-SAME: float nofpclass(inf nzero sub norm) [[PZERO_OR_NAN:%.*]], float [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = call float @llvm.copysign.f32(float 0.000000e+00, float [[UNKNOWN]])
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul float %pzero.or.nan, %unknown
  ret float %mul
}

; -> copysign, take no-infs-no-nans from invalid return, commuted
define nofpclass(inf nan) float @ret_noinf_nonan__not_inf_or_nan__fmul__known_pzero_or_nan(float nofpclass(inf sub norm nzero) %pzero.or.nan, float %unknown) {
; CHECK-LABEL: define nofpclass(nan inf) float @ret_noinf_nonan__not_inf_or_nan__fmul__known_pzero_or_nan(
; CHECK-SAME: float nofpclass(inf nzero sub norm) [[PZERO_OR_NAN:%.*]], float [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = call float @llvm.copysign.f32(float 0.000000e+00, float [[UNKNOWN]])
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul float %pzero.or.nan, %unknown
  ret float %mul
}

; -> copysign, take no-infs from invalid return
define nofpclass(inf) float @ret_noinf__known_zero_or_nan__fmul__not_nan(float nofpclass(nan sub norm nzero) %pzero.or.inf, float nofpclass(nan) %not.nan) {
; CHECK-LABEL: define nofpclass(inf) float @ret_noinf__known_zero_or_nan__fmul__not_nan(
; CHECK-SAME: float nofpclass(nan nzero sub norm) [[PZERO_OR_INF:%.*]], float nofpclass(nan) [[NOT_NAN:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = fmul float [[PZERO_OR_INF]], [[NOT_NAN]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul float %pzero.or.inf, %not.nan
  ret float %mul
}

; -> copysign, take no-infs from invalid return, commuted
define nofpclass(inf) float @ret_noinf__noinf_or_nan__fmul__known_pzero_or_nan(float nofpclass(nan) %not.nan, float nofpclass(nan sub norm nzero) %pzero.or.inf) {
; CHECK-LABEL: define nofpclass(inf) float @ret_noinf__noinf_or_nan__fmul__known_pzero_or_nan(
; CHECK-SAME: float nofpclass(nan) [[NOT_NAN:%.*]], float nofpclass(nan nzero sub norm) [[PZERO_OR_INF:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = fmul float [[NOT_NAN]], [[PZERO_OR_INF]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul float %not.nan, %pzero.or.inf
  ret float %mul
}

; -> copysign, take no-nans from invalid return
define nofpclass(nan) float @ret_nonan__known_zero_or_nan__fmul__not_nan(float nofpclass(nan sub norm nzero) %pzero.or.inf, float nofpclass(nan) %not.nan) {
; CHECK-LABEL: define nofpclass(nan) float @ret_nonan__known_zero_or_nan__fmul__not_nan(
; CHECK-SAME: float nofpclass(nan nzero sub norm) [[PZERO_OR_INF:%.*]], float nofpclass(nan) [[NOT_NAN:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = fmul nnan float [[PZERO_OR_INF]], [[NOT_NAN]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul float %pzero.or.inf, %not.nan
  ret float %mul
}

; -> copysign, take no-nans from invalid return, commuted
define nofpclass(nan) float @ret_nonan__noinf_or_nan__fmul__known_pzero_or_nan(float nofpclass(nan) %not.nan, float nofpclass(nan sub norm nzero) %pzero.or.inf) {
; CHECK-LABEL: define nofpclass(nan) float @ret_nonan__noinf_or_nan__fmul__known_pzero_or_nan(
; CHECK-SAME: float nofpclass(nan) [[NOT_NAN:%.*]], float nofpclass(nan nzero sub norm) [[PZERO_OR_INF:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = fmul nnan float [[NOT_NAN]], [[PZERO_OR_INF]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul float %not.nan, %pzero.or.inf
  ret float %mul
}

define nofpclass(pinf) float @ret_nopinf__known_pzero_or_nan__fmul__not_nan(float nofpclass(nan sub norm nzero) %pzero.or.inf, float nofpclass(nan) %not.nan) {
; CHECK-LABEL: define nofpclass(pinf) float @ret_nopinf__known_pzero_or_nan__fmul__not_nan(
; CHECK-SAME: float nofpclass(nan nzero sub norm) [[PZERO_OR_INF:%.*]], float nofpclass(nan) [[NOT_NAN:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = fmul float [[PZERO_OR_INF]], [[NOT_NAN]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul float %pzero.or.inf, %not.nan
  ret float %mul
}

define nofpclass(pinf) float @ret_nopinf__not_nan__fmul__known_zero_or_nan(float nofpclass(nan) %not.nan, float nofpclass(nan sub norm nzero) %pzero.or.inf) {
; CHECK-LABEL: define nofpclass(pinf) float @ret_nopinf__not_nan__fmul__known_zero_or_nan(
; CHECK-SAME: float nofpclass(nan) [[NOT_NAN:%.*]], float nofpclass(nan nzero sub norm) [[PZERO_OR_INF:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = fmul float [[NOT_NAN]], [[PZERO_OR_INF]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul float %not.nan, %pzero.or.inf
  ret float %mul
}

define nofpclass(ninf) float @ret_noninf__known_pzero_or_nan__fmul__not_nan(float nofpclass(nan sub norm nzero) %pzero.or.inf, float nofpclass(nan) %not.nan) {
; CHECK-LABEL: define nofpclass(ninf) float @ret_noninf__known_pzero_or_nan__fmul__not_nan(
; CHECK-SAME: float nofpclass(nan nzero sub norm) [[PZERO_OR_INF:%.*]], float nofpclass(nan) [[NOT_NAN:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = fmul float [[PZERO_OR_INF]], [[NOT_NAN]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul float %pzero.or.inf, %not.nan
  ret float %mul
}

define nofpclass(ninf) float @ret_noninf__not_nan__fmul__known_zero_or_nan(float nofpclass(nan) %not.nan, float nofpclass(nan sub norm nzero) %pzero.or.inf) {
; CHECK-LABEL: define nofpclass(ninf) float @ret_noninf__not_nan__fmul__known_zero_or_nan(
; CHECK-SAME: float nofpclass(nan) [[NOT_NAN:%.*]], float nofpclass(nan nzero sub norm) [[PZERO_OR_INF:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = fmul float [[NOT_NAN]], [[PZERO_OR_INF]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul float %not.nan, %pzero.or.inf
  ret float %mul
}

; no pinf result implies no infs if the signs of each operand are the same, must be +0
define nofpclass(pinf) float @ret_nopinf__known_zero_or_pos_nan__fmul__not_nan_pos(float nofpclass(nan ninf sub norm) %zero.or.not.neg, float nofpclass(nan ninf nzero nsub nnorm) %not.nan.not.neg) {
; CHECK-LABEL: define nofpclass(pinf) float @ret_nopinf__known_zero_or_pos_nan__fmul__not_nan_pos(
; CHECK-SAME: float nofpclass(nan ninf sub norm) [[ZERO_OR_NOT_NEG:%.*]], float nofpclass(nan ninf nzero nsub nnorm) [[NOT_NAN_NOT_NEG:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = fmul float [[ZERO_OR_NOT_NEG]], [[NOT_NAN_NOT_NEG]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul float %zero.or.not.neg, %not.nan.not.neg
  ret float %mul
}

define nofpclass(pinf) float @ret_nopinf__not_nan_pos__fmul__known_zero_or_pos_nan(float nofpclass(nan ninf nsub nnorm) %not.nan.not.neg, float nofpclass(nan ninf nzero sub norm) %zero.or.not.neg) {
; CHECK-LABEL: define nofpclass(pinf) float @ret_nopinf__not_nan_pos__fmul__known_zero_or_pos_nan(
; CHECK-SAME: float nofpclass(nan ninf nsub nnorm) [[NOT_NAN_NOT_NEG:%.*]], float nofpclass(nan ninf nzero sub norm) [[ZERO_OR_NOT_NEG:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = fmul float [[NOT_NAN_NOT_NEG]], [[ZERO_OR_NOT_NEG]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul float %not.nan.not.neg, %zero.or.not.neg
  ret float %mul
}

define nofpclass(pinf) float @ret_nopinf__known_zero_or_neg_nan__fmul__not_nan_neg(float nofpclass(nan pinf sub norm) %zero.or.not.pos, float nofpclass(nan pinf pzero psub pnorm) %not.nan.not.pos) {
; CHECK-LABEL: define nofpclass(pinf) float @ret_nopinf__known_zero_or_neg_nan__fmul__not_nan_neg(
; CHECK-SAME: float nofpclass(nan pinf sub norm) [[ZERO_OR_NOT_POS:%.*]], float nofpclass(nan pinf pzero psub pnorm) [[NOT_NAN_NOT_POS:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = fmul float [[ZERO_OR_NOT_POS]], [[NOT_NAN_NOT_POS]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul float %zero.or.not.pos, %not.nan.not.pos
  ret float %mul
}

define nofpclass(pinf) float @ret_nopinf__not_nan_neg__fmul__known_zero_or_neg_nan(float nofpclass(nan pinf pzero psub pnorm) %not.nan.not.pos, float nofpclass(nan pinf sub norm) %zero.or.not.pos) {
; CHECK-LABEL: define nofpclass(pinf) float @ret_nopinf__not_nan_neg__fmul__known_zero_or_neg_nan(
; CHECK-SAME: float nofpclass(nan pinf pzero psub pnorm) [[NOT_NAN_NOT_POS:%.*]], float nofpclass(nan pinf sub norm) [[ZERO_OR_NOT_POS:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = fmul float [[NOT_NAN_NOT_POS]], [[ZERO_OR_NOT_POS]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul float %not.nan.not.pos, %zero.or.not.pos
  ret float %mul
}

define nofpclass(ninf) float @ret_noninf__known_zero_or_pos_nan__fmul__not_nan_pos(float nofpclass(nan ninf sub norm) %zero.or.not.neg, float nofpclass(nan ninf nzero nsub nnorm) %not.nan.not.neg) {
; CHECK-LABEL: define nofpclass(ninf) float @ret_noninf__known_zero_or_pos_nan__fmul__not_nan_pos(
; CHECK-SAME: float nofpclass(nan ninf sub norm) [[ZERO_OR_NOT_NEG:%.*]], float nofpclass(nan ninf nzero nsub nnorm) [[NOT_NAN_NOT_NEG:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = fmul float [[ZERO_OR_NOT_NEG]], [[NOT_NAN_NOT_NEG]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul float %zero.or.not.neg, %not.nan.not.neg
  ret float %mul
}

define nofpclass(ninf) float @ret_noninf__not_nan_pos__fmul__known_zero_or_pos_nan(float nofpclass(nan ninf nzero nsub nnorm) %not.nan.not.neg, float nofpclass(nan ninf sub norm) %zero.or.not.neg) {
; CHECK-LABEL: define nofpclass(ninf) float @ret_noninf__not_nan_pos__fmul__known_zero_or_pos_nan(
; CHECK-SAME: float nofpclass(nan ninf nzero nsub nnorm) [[NOT_NAN_NOT_NEG:%.*]], float nofpclass(nan ninf sub norm) [[ZERO_OR_NOT_NEG:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = fmul float [[NOT_NAN_NOT_NEG]], [[ZERO_OR_NOT_NEG]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul float %not.nan.not.neg, %zero.or.not.neg
  ret float %mul
}

define nofpclass(ninf) float @ret_noninf__known_zero_or_pos_nan__fmul__not_nan_neg(float nofpclass(nan ninf sub norm) %zero.or.not.neg, float nofpclass(nan pinf pzero psub pnorm) %not.nan.not.pos) {
; CHECK-LABEL: define nofpclass(ninf) float @ret_noninf__known_zero_or_pos_nan__fmul__not_nan_neg(
; CHECK-SAME: float nofpclass(nan ninf sub norm) [[ZERO_OR_NOT_NEG:%.*]], float nofpclass(nan pinf pzero psub pnorm) [[NOT_NAN_NOT_POS:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = fmul float [[ZERO_OR_NOT_NEG]], [[NOT_NAN_NOT_POS]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul float %zero.or.not.neg, %not.nan.not.pos
  ret float %mul
}

define nofpclass(ninf) float @ret_noninf__not_nan_neg__fmul__known_zero_or_pos_nan(float nofpclass(nan pinf pzero psub pnorm) %not.nan.not.pos, float nofpclass(nan ninf sub norm) %zero.or.not.neg) {
; CHECK-LABEL: define nofpclass(ninf) float @ret_noninf__not_nan_neg__fmul__known_zero_or_pos_nan(
; CHECK-SAME: float nofpclass(nan pinf pzero psub pnorm) [[NOT_NAN_NOT_POS:%.*]], float nofpclass(nan ninf sub norm) [[ZERO_OR_NOT_NEG:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = fmul float [[NOT_NAN_NOT_POS]], [[ZERO_OR_NOT_NEG]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul float %not.nan.not.pos, %zero.or.not.neg
  ret float %mul
}

define nofpclass(inf norm sub zero) float @ret_only_nan_results_fmul(float %x, float %y) {
; CHECK-LABEL: define nofpclass(inf zero sub norm) float @ret_only_nan_results_fmul(
; CHECK-SAME: float [[X:%.*]], float [[Y:%.*]]) {
; CHECK-NEXT:    ret float 0x7FF8000000000000
;
  %mul = fmul float %x, %y
  ret float %mul
}

define nofpclass(inf norm sub zero snan) float @ret_only_qnan_results_fmul(float %x, float %y) {
; CHECK-LABEL: define nofpclass(snan inf zero sub norm) float @ret_only_qnan_results_fmul(
; CHECK-SAME: float [[X:%.*]], float [[Y:%.*]]) {
; CHECK-NEXT:    ret float 0x7FF8000000000000
;
  %mul = fmul float %x, %y
  ret float %mul
}

define nofpclass(inf norm sub zero qnan) float @ret_only_snan_results_fmul(float %x, float %y) {
; CHECK-LABEL: define nofpclass(qnan inf zero sub norm) float @ret_only_snan_results_fmul(
; CHECK-SAME: float [[X:%.*]], float [[Y:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = fmul float [[X]], [[Y]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul float %x, %y
  ret float %mul
}

define nofpclass(nan inf) float @ret_no_nan_no_inf__fmul_nonan_noinf__nonan_noinf(float nofpclass(inf nan) %x, float nofpclass(inf nan) %y) {
; CHECK-LABEL: define nofpclass(nan inf) float @ret_no_nan_no_inf__fmul_nonan_noinf__nonan_noinf(
; CHECK-SAME: float nofpclass(nan inf) [[X:%.*]], float nofpclass(nan inf) [[Y:%.*]]) {
; CHECK-NEXT:    [[FMUL:%.*]] = fmul nnan ninf float [[X]], [[Y]]
; CHECK-NEXT:    ret float [[FMUL]]
;
  %fmul = fmul float %x, %y
  ret float %fmul
}

define nofpclass(nan inf) float @ret_no_nan_no_inf__fmul_no_nan__normal_constant(float nofpclass(inf nan) %x) {
; CHECK-LABEL: define nofpclass(nan inf) float @ret_no_nan_no_inf__fmul_no_nan__normal_constant(
; CHECK-SAME: float nofpclass(nan inf) [[X:%.*]]) {
; CHECK-NEXT:    [[FMUL:%.*]] = fmul nnan ninf float [[X]], 4.000000e+00
; CHECK-NEXT:    ret float [[FMUL]]
;
  %fmul = fmul float %x, 4.0
  ret float %fmul
}

define nofpclass(nan) float @ret_no_nan__fmul_zero__unknown(float %unknown) {
; CHECK-LABEL: define nofpclass(nan) float @ret_no_nan__fmul_zero__unknown(
; CHECK-SAME: float [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[ZERO:%.*]] = call float @returns_zero()
; CHECK-NEXT:    [[FMUL:%.*]] = fmul nnan float [[ZERO]], [[UNKNOWN]]
; CHECK-NEXT:    ret float [[FMUL]]
;
  %zero = call float @returns_zero()
  %fmul = fmul float %zero, %unknown
  ret float %fmul
}

define nofpclass(nan) float @ret_no_nan__fmul_unknown__zero(float %unknown) {
; CHECK-LABEL: define nofpclass(nan) float @ret_no_nan__fmul_unknown__zero(
; CHECK-SAME: float [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[ZERO:%.*]] = call float @returns_zero()
; CHECK-NEXT:    [[FMUL:%.*]] = fmul nnan float [[UNKNOWN]], [[ZERO]]
; CHECK-NEXT:    ret float [[FMUL]]
;
  %zero = call float @returns_zero()
  %fmul = fmul float %unknown, %zero
  ret float %fmul
}

define nofpclass(nan) float @ret_no_nan__fmul_pzero__unknown(float %unknown) {
; CHECK-LABEL: define nofpclass(nan) float @ret_no_nan__fmul_pzero__unknown(
; CHECK-SAME: float [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[PZERO:%.*]] = call float @returns_pzero()
; CHECK-NEXT:    [[FMUL:%.*]] = call float @llvm.copysign.f32(float 0.000000e+00, float [[UNKNOWN]])
; CHECK-NEXT:    ret float [[FMUL]]
;
  %pzero = call float @returns_pzero()
  %fmul = fmul float %pzero, %unknown
  ret float %fmul
}

define nofpclass(nan) float @ret_no_nan__fmul_unknown__pzero(float %unknown) {
; CHECK-LABEL: define nofpclass(nan) float @ret_no_nan__fmul_unknown__pzero(
; CHECK-SAME: float [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[PZERO:%.*]] = call float @returns_pzero()
; CHECK-NEXT:    [[FMUL:%.*]] = call float @llvm.copysign.f32(float 0.000000e+00, float [[UNKNOWN]])
; CHECK-NEXT:    ret float [[FMUL]]
;
  %pzero = call float @returns_pzero()
  %fmul = fmul float %unknown, %pzero
  ret float %fmul
}

define nofpclass(nan) float @ret_no_nan__fmul_nzero__unknown(float %unknown) {
; CHECK-LABEL: define nofpclass(nan) float @ret_no_nan__fmul_nzero__unknown(
; CHECK-SAME: float [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[NZERO:%.*]] = call float @returns_nzero()
; CHECK-NEXT:    [[TMP1:%.*]] = fneg float [[UNKNOWN]]
; CHECK-NEXT:    [[FMUL:%.*]] = call float @llvm.copysign.f32(float 0.000000e+00, float [[TMP1]])
; CHECK-NEXT:    ret float [[FMUL]]
;
  %nzero = call float @returns_nzero()
  %fmul = fmul float %nzero, %unknown
  ret float %fmul
}

define nofpclass(nan) float @ret_no_nan__fmul_nzero__unknown_insert_point(float %unknown) {
; CHECK-LABEL: define nofpclass(nan) float @ret_no_nan__fmul_nzero__unknown_insert_point(
; CHECK-SAME: float [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[NZERO:%.*]] = call float @returns_nzero()
; CHECK-NEXT:    [[TMP1:%.*]] = fneg float [[UNKNOWN]]
; CHECK-NEXT:    [[FMUL:%.*]] = call float @llvm.copysign.f32(float 0.000000e+00, float [[TMP1]])
; CHECK-NEXT:    [[BARRIER:%.*]] = call float @llvm.arithmetic.fence.f32(float [[FMUL]])
; CHECK-NEXT:    ret float [[BARRIER]]
;
  %nzero = call float @returns_nzero()
  %fmul = fmul float %nzero, %unknown
  %barrier =call float @llvm.arithmetic.fence.f32(float %fmul)
  ret float %barrier
}

define nofpclass(nan) float @ret_no_nan__fmul_unknown__nzero(float %unknown) {
; CHECK-LABEL: define nofpclass(nan) float @ret_no_nan__fmul_unknown__nzero(
; CHECK-SAME: float [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[NZERO:%.*]] = call float @returns_nzero()
; CHECK-NEXT:    [[TMP1:%.*]] = fneg float [[UNKNOWN]]
; CHECK-NEXT:    [[FMUL:%.*]] = call float @llvm.copysign.f32(float 0.000000e+00, float [[TMP1]])
; CHECK-NEXT:    ret float [[FMUL]]
;
  %nzero = call float @returns_nzero()
  %fmul = fmul float %unknown, %nzero
  ret float %fmul
}

define nofpclass(ninf) float @ret_ninf__fmul_nnan_zero__unknown(float %unknown) {
; CHECK-LABEL: define nofpclass(ninf) float @ret_ninf__fmul_nnan_zero__unknown(
; CHECK-SAME: float [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[ZERO:%.*]] = call float @returns_zero()
; CHECK-NEXT:    [[FMUL:%.*]] = fmul nnan float [[ZERO]], [[UNKNOWN]]
; CHECK-NEXT:    ret float [[FMUL]]
;
  %zero = call float @returns_zero()
  %fmul = fmul nnan float %zero, %unknown
  ret float %fmul
}

define nofpclass(ninf) float @ret_ninf__fmul_nnan_unknown__zero(float %unknown) {
; CHECK-LABEL: define nofpclass(ninf) float @ret_ninf__fmul_nnan_unknown__zero(
; CHECK-SAME: float [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[ZERO:%.*]] = call float @returns_zero()
; CHECK-NEXT:    [[FMUL:%.*]] = fmul nnan float [[UNKNOWN]], [[ZERO]]
; CHECK-NEXT:    ret float [[FMUL]]
;
  %zero = call float @returns_zero()
  %fmul = fmul nnan float %unknown, %zero
  ret float %fmul
}

; -> copysign + fneg
define nofpclass(snan) float @known__nzero_or_nan__fmul__not_inf_or_nan(float nofpclass(inf sub norm pzero) %nzero.or.nan, float nofpclass(inf nan) %not.inf.or.nan) {
; CHECK-LABEL: define nofpclass(snan) float @known__nzero_or_nan__fmul__not_inf_or_nan(
; CHECK-SAME: float nofpclass(inf pzero sub norm) [[NZERO_OR_NAN:%.*]], float nofpclass(nan inf) [[NOT_INF_OR_NAN:%.*]]) {
; CHECK-NEXT:    [[TMP1:%.*]] = fneg contract float [[NOT_INF_OR_NAN]]
; CHECK-NEXT:    [[MUL:%.*]] = call contract float @llvm.copysign.f32(float [[NZERO_OR_NAN]], float [[TMP1]])
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul contract float %nzero.or.nan, %not.inf.or.nan
  ret float %mul
}

define nofpclass(snan) float @known__nzero_or_nan__fmul__not_inf_or_nan__insert_point(float nofpclass(inf sub norm pzero) %nzero.or.nan, float nofpclass(inf nan) %not.inf.or.nan) {
; CHECK-LABEL: define nofpclass(snan) float @known__nzero_or_nan__fmul__not_inf_or_nan__insert_point(
; CHECK-SAME: float nofpclass(inf pzero sub norm) [[NZERO_OR_NAN:%.*]], float nofpclass(nan inf) [[NOT_INF_OR_NAN:%.*]]) {
; CHECK-NEXT:    [[TMP1:%.*]] = fneg contract float [[NOT_INF_OR_NAN]]
; CHECK-NEXT:    [[MUL:%.*]] = call contract float @llvm.copysign.f32(float [[NZERO_OR_NAN]], float [[TMP1]])
; CHECK-NEXT:    [[BARRIER:%.*]] = call float @llvm.arithmetic.fence.f32(float [[MUL]])
; CHECK-NEXT:    ret float [[BARRIER]]
;
  %mul = fmul contract float %nzero.or.nan, %not.inf.or.nan
  %barrier = call float @llvm.arithmetic.fence.f32(float %mul)
  ret float %barrier
}

; -> copysign + fneg
define nofpclass(snan) float @known__not_inf_or_nan__fmul__nzero_or_nan(float nofpclass(inf nan) %not.inf.or.nan, float nofpclass(inf sub norm pzero) %nzero.or.nan) {
; CHECK-LABEL: define nofpclass(snan) float @known__not_inf_or_nan__fmul__nzero_or_nan(
; CHECK-SAME: float nofpclass(nan inf) [[NOT_INF_OR_NAN:%.*]], float nofpclass(inf pzero sub norm) [[NZERO_OR_NAN:%.*]]) {
; CHECK-NEXT:    [[TMP1:%.*]] = fneg contract float [[NOT_INF_OR_NAN]]
; CHECK-NEXT:    [[MUL:%.*]] = call contract float @llvm.copysign.f32(float [[NZERO_OR_NAN]], float [[TMP1]])
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul contract float %not.inf.or.nan, %nzero.or.nan
  ret float %mul
}

; cannot replace with copysign + fneg
define nofpclass(snan) float @known__nzero_or_nan__fmul__not_inf(float nofpclass(inf sub norm pzero) %nzero.or.nan, float nofpclass(inf) %not.inf) {
; CHECK-LABEL: define nofpclass(snan) float @known__nzero_or_nan__fmul__not_inf(
; CHECK-SAME: float nofpclass(inf pzero sub norm) [[NZERO_OR_NAN:%.*]], float nofpclass(inf) [[NOT_INF:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = fmul ninf float [[NZERO_OR_NAN]], [[NOT_INF]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul float %nzero.or.nan, %not.inf
  ret float %mul
}

; cannot replace with copysign + fneg
define nofpclass(snan) float @known__not_inf__fmul__nzero_or_nan(float nofpclass(inf) %not.inf, float nofpclass(inf sub norm pzero) %nzero.or.nan) {
; CHECK-LABEL: define nofpclass(snan) float @known__not_inf__fmul__nzero_or_nan(
; CHECK-SAME: float nofpclass(inf) [[NOT_INF:%.*]], float nofpclass(inf pzero sub norm) [[NZERO_OR_NAN:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = fmul ninf float [[NOT_INF]], [[NZERO_OR_NAN]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul float %not.inf, %nzero.or.nan
  ret float %mul
}

; cannot replace with copysign + fneg
define nofpclass(snan) float @known__nzero_or_nan__fmul__not_nan(float nofpclass(inf sub norm pzero) %nzero.or.nan, float nofpclass(nan) %not.nan) {
; CHECK-LABEL: define nofpclass(snan) float @known__nzero_or_nan__fmul__not_nan(
; CHECK-SAME: float nofpclass(inf pzero sub norm) [[NZERO_OR_NAN:%.*]], float nofpclass(nan) [[NOT_NAN:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = fmul contract float [[NZERO_OR_NAN]], [[NOT_NAN]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul contract float %nzero.or.nan, %not.nan
  ret float %mul
}

; cannot replace with copysign + fneg
define nofpclass(snan) float @known__not_nan__fmul__nzero_or_nan(float nofpclass(nan) %not.nan, float nofpclass(inf sub norm pzero) %nzero.or.nan) {
; CHECK-LABEL: define nofpclass(snan) float @known__not_nan__fmul__nzero_or_nan(
; CHECK-SAME: float nofpclass(nan) [[NOT_NAN:%.*]], float nofpclass(inf pzero sub norm) [[NZERO_OR_NAN:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = fmul contract float [[NOT_NAN]], [[NZERO_OR_NAN]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul contract float %not.nan, %nzero.or.nan
  ret float %mul
}

; -> copysign + fneg, no infinity from return
define nofpclass(inf) float @ret_noinf__nzero_or_nan__fmul__not_inf_or_nan(float nofpclass(inf sub norm pzero) %nzero.or.nan, float nofpclass(nan) %not.nan) {
; CHECK-LABEL: define nofpclass(inf) float @ret_noinf__nzero_or_nan__fmul__not_inf_or_nan(
; CHECK-SAME: float nofpclass(inf pzero sub norm) [[NZERO_OR_NAN:%.*]], float nofpclass(nan) [[NOT_NAN:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = fmul float [[NZERO_OR_NAN]], [[NOT_NAN]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul float %nzero.or.nan, %not.nan
  ret float %mul
}

; -> copysign + fneg, no infinity from return
define nofpclass(inf) float @ret_noinf__not_inf_or_nan__fmul__nzero_or_nan(float nofpclass(nan) %not.nan, float nofpclass(inf sub norm pzero) %nzero.or.nan) {
; CHECK-LABEL: define nofpclass(inf) float @ret_noinf__not_inf_or_nan__fmul__nzero_or_nan(
; CHECK-SAME: float nofpclass(nan) [[NOT_NAN:%.*]], float nofpclass(inf pzero sub norm) [[NZERO_OR_NAN:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = fmul float [[NOT_NAN]], [[NZERO_OR_NAN]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul float %not.nan, %nzero.or.nan
  ret float %mul
}

; -> copysign + fneg, no nans from return
define nofpclass(nan) float @ret_nonan__nzero_or_nan__fmul__not_inf_or_nan(float nofpclass(inf sub norm pzero) %nzero.or.nan, float nofpclass(nan) %not.nan) {
; CHECK-LABEL: define nofpclass(nan) float @ret_nonan__nzero_or_nan__fmul__not_inf_or_nan(
; CHECK-SAME: float nofpclass(inf pzero sub norm) [[NZERO_OR_NAN:%.*]], float nofpclass(nan) [[NOT_NAN:%.*]]) {
; CHECK-NEXT:    [[TMP1:%.*]] = fneg float [[NOT_NAN]]
; CHECK-NEXT:    [[MUL:%.*]] = call float @llvm.copysign.f32(float 0.000000e+00, float [[TMP1]])
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul float %nzero.or.nan, %not.nan
  ret float %mul
}

; -> copysign + fneg, no nans from return
define nofpclass(nan) float @ret_nonan__not_inf_or_nan__fmul__nzero_or_nan(float nofpclass(nan) %not.nan, float nofpclass(inf sub norm pzero) %nzero.or.nan) {
; CHECK-LABEL: define nofpclass(nan) float @ret_nonan__not_inf_or_nan__fmul__nzero_or_nan(
; CHECK-SAME: float nofpclass(nan) [[NOT_NAN:%.*]], float nofpclass(inf pzero sub norm) [[NZERO_OR_NAN:%.*]]) {
; CHECK-NEXT:    [[TMP1:%.*]] = fneg float [[NOT_NAN]]
; CHECK-NEXT:    [[MUL:%.*]] = call float @llvm.copysign.f32(float 0.000000e+00, float [[TMP1]])
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul float %not.nan, %nzero.or.nan
  ret float %mul
}

; -> copysign + fneg, no infinity from flag
define nofpclass(snan) float @ret__nzero_or_nan__fmul_ninf__not_inf_or_nan(float nofpclass(inf sub norm pzero) %nzero.or.nan, float nofpclass(nan) %not.nan) {
; CHECK-LABEL: define nofpclass(snan) float @ret__nzero_or_nan__fmul_ninf__not_inf_or_nan(
; CHECK-SAME: float nofpclass(inf pzero sub norm) [[NZERO_OR_NAN:%.*]], float nofpclass(nan) [[NOT_NAN:%.*]]) {
; CHECK-NEXT:    [[TMP1:%.*]] = fneg ninf float [[NOT_NAN]]
; CHECK-NEXT:    [[MUL:%.*]] = call ninf float @llvm.copysign.f32(float [[NZERO_OR_NAN]], float [[TMP1]])
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul ninf float %nzero.or.nan, %not.nan
  ret float %mul
}

; -> copysign + fneg, no infinity from flag
define nofpclass(snan) float @ret_not_inf_or_nan__fmul_ninf__nzero_or_nan(float nofpclass(nan) %not.nan, float nofpclass(inf sub norm pzero) %nzero.or.nan) {
; CHECK-LABEL: define nofpclass(snan) float @ret_not_inf_or_nan__fmul_ninf__nzero_or_nan(
; CHECK-SAME: float nofpclass(nan) [[NOT_NAN:%.*]], float nofpclass(inf pzero sub norm) [[NZERO_OR_NAN:%.*]]) {
; CHECK-NEXT:    [[TMP1:%.*]] = fneg ninf float [[NOT_NAN]]
; CHECK-NEXT:    [[MUL:%.*]] = call ninf float @llvm.copysign.f32(float [[NZERO_OR_NAN]], float [[TMP1]])
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul ninf float %not.nan, %nzero.or.nan
  ret float %mul
}

; -> copysign + fneg, no nan from flag
define nofpclass(snan) float @ret__nzero_or_nan__fmul_nnan__not_inf_or_nan(float nofpclass(inf sub norm pzero) %nzero.or.nan, float %unknown) {
; CHECK-LABEL: define nofpclass(snan) float @ret__nzero_or_nan__fmul_nnan__not_inf_or_nan(
; CHECK-SAME: float nofpclass(inf pzero sub norm) [[NZERO_OR_NAN:%.*]], float [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[TMP1:%.*]] = fneg nnan float [[UNKNOWN]]
; CHECK-NEXT:    [[MUL:%.*]] = call nnan float @llvm.copysign.f32(float 0.000000e+00, float [[TMP1]])
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul nnan float %nzero.or.nan, %unknown
  ret float %mul
}

; -> copysign + fneg, no nan from flag
define nofpclass(snan) float @not_inf_or_nan__fmul_nnan__nzero_or_nan(float %unknown, float nofpclass(inf sub norm pzero) %nzero.or.nan) {
; CHECK-LABEL: define nofpclass(snan) float @not_inf_or_nan__fmul_nnan__nzero_or_nan(
; CHECK-SAME: float [[UNKNOWN:%.*]], float nofpclass(inf pzero sub norm) [[NZERO_OR_NAN:%.*]]) {
; CHECK-NEXT:    [[TMP1:%.*]] = fneg nnan float [[UNKNOWN]]
; CHECK-NEXT:    [[MUL:%.*]] = call nnan float @llvm.copysign.f32(float 0.000000e+00, float [[TMP1]])
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul nnan float %unknown, %nzero.or.nan
  ret float %mul
}

; -> copysign
define nofpclass(snan) float @known__pzero_or_nan__fmul__not_inf_or_nan(float nofpclass(inf sub norm nzero) %pzero.or.nan, float nofpclass(inf nan) %not.inf.or.nan) {
; CHECK-LABEL: define nofpclass(snan) float @known__pzero_or_nan__fmul__not_inf_or_nan(
; CHECK-SAME: float nofpclass(inf nzero sub norm) [[PZERO_OR_NAN:%.*]], float nofpclass(nan inf) [[NOT_INF_OR_NAN:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = call contract float @llvm.copysign.f32(float [[PZERO_OR_NAN]], float [[NOT_INF_OR_NAN]])
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul contract float %pzero.or.nan, %not.inf.or.nan
  ret float %mul
}

; -> copysign
define nofpclass(snan) float @known__not_inf_or_nan__fmul__pzero_or_nan(float nofpclass(inf nan) %not.inf.or.nan, float nofpclass(inf sub norm nzero) %pzero.or.nan) {
; CHECK-LABEL: define nofpclass(snan) float @known__not_inf_or_nan__fmul__pzero_or_nan(
; CHECK-SAME: float nofpclass(nan inf) [[NOT_INF_OR_NAN:%.*]], float nofpclass(inf nzero sub norm) [[PZERO_OR_NAN:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = call contract float @llvm.copysign.f32(float [[PZERO_OR_NAN]], float [[NOT_INF_OR_NAN]])
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul contract float %not.inf.or.nan, %pzero.or.nan
  ret float %mul
}

; cannot replace with copysign
define nofpclass(snan) float @known__pzero_or_nan__fmul__not_inf(float nofpclass(inf sub norm nzero) %pzero.or.nan, float nofpclass(inf) %not.inf) {
; CHECK-LABEL: define nofpclass(snan) float @known__pzero_or_nan__fmul__not_inf(
; CHECK-SAME: float nofpclass(inf nzero sub norm) [[PZERO_OR_NAN:%.*]], float nofpclass(inf) [[NOT_INF:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = fmul ninf float [[PZERO_OR_NAN]], [[NOT_INF]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul float %pzero.or.nan, %not.inf
  ret float %mul
}

; cannot replace with copysign
define nofpclass(snan) float @known__not_inf__fmul__pzero_or_nan(float nofpclass(inf) %not.inf, float nofpclass(inf sub norm nzero) %pzero.or.nan) {
; CHECK-LABEL: define nofpclass(snan) float @known__not_inf__fmul__pzero_or_nan(
; CHECK-SAME: float nofpclass(inf) [[NOT_INF:%.*]], float nofpclass(inf nzero sub norm) [[PZERO_OR_NAN:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = fmul ninf float [[NOT_INF]], [[PZERO_OR_NAN]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul float %not.inf, %pzero.or.nan
  ret float %mul
}

; cannot replace with copysign
define nofpclass(snan) float @known__pzero_or_nan__fmul__not_nan(float nofpclass(inf sub norm nzero) %pzero.or.nan, float nofpclass(nan) %not.nan) {
; CHECK-LABEL: define nofpclass(snan) float @known__pzero_or_nan__fmul__not_nan(
; CHECK-SAME: float nofpclass(inf nzero sub norm) [[PZERO_OR_NAN:%.*]], float nofpclass(nan) [[NOT_NAN:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = fmul contract float [[PZERO_OR_NAN]], [[NOT_NAN]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul contract float %pzero.or.nan, %not.nan
  ret float %mul
}

; cannot replace with copysign
define nofpclass(snan) float @known__not_nan__fmul__pzero_or_nan(float nofpclass(nan) %not.nan, float nofpclass(inf sub norm nzero) %pzero.or.nan) {
; CHECK-LABEL: define nofpclass(snan) float @known__not_nan__fmul__pzero_or_nan(
; CHECK-SAME: float nofpclass(nan) [[NOT_NAN:%.*]], float nofpclass(inf nzero sub norm) [[PZERO_OR_NAN:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = fmul contract float [[NOT_NAN]], [[PZERO_OR_NAN]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul contract float %not.nan, %pzero.or.nan
  ret float %mul
}

; -> copysign, no infinity from return
define nofpclass(inf) float @ret_noinf__pzero_or_nan__fmul__not_inf_or_nan(float nofpclass(inf sub norm nzero) %pzero.or.nan, float nofpclass(nan) %not.nan) {
; CHECK-LABEL: define nofpclass(inf) float @ret_noinf__pzero_or_nan__fmul__not_inf_or_nan(
; CHECK-SAME: float nofpclass(inf nzero sub norm) [[PZERO_OR_NAN:%.*]], float nofpclass(nan) [[NOT_NAN:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = fmul float [[PZERO_OR_NAN]], [[NOT_NAN]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul float %pzero.or.nan, %not.nan
  ret float %mul
}

; -> copysign, no infinity from return
define nofpclass(inf) float @ret_noinf__not_inf_or_nan__fmul__pzero_or_nan(float nofpclass(nan) %not.nan, float nofpclass(inf sub norm nzero) %pzero.or.nan) {
; CHECK-LABEL: define nofpclass(inf) float @ret_noinf__not_inf_or_nan__fmul__pzero_or_nan(
; CHECK-SAME: float nofpclass(nan) [[NOT_NAN:%.*]], float nofpclass(inf nzero sub norm) [[PZERO_OR_NAN:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = fmul float [[NOT_NAN]], [[PZERO_OR_NAN]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul float %not.nan, %pzero.or.nan
  ret float %mul
}

; -> copysign, no infinity from flag
define nofpclass(snan) float @ret__pzero_or_nan__fmul_ninf__not_inf_or_nan(float nofpclass(inf sub norm nzero) %pzero.or.nan, float nofpclass(nan) %not.nan) {
; CHECK-LABEL: define nofpclass(snan) float @ret__pzero_or_nan__fmul_ninf__not_inf_or_nan(
; CHECK-SAME: float nofpclass(inf nzero sub norm) [[PZERO_OR_NAN:%.*]], float nofpclass(nan) [[NOT_NAN:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = call ninf float @llvm.copysign.f32(float [[PZERO_OR_NAN]], float [[NOT_NAN]])
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul ninf float %pzero.or.nan, %not.nan
  ret float %mul
}

; -> copysign, no infinity from flag
define nofpclass(snan) float @ret_not_inf_or_nan__fmul_ninf__pzero_or_nan(float nofpclass(nan) %not.nan, float nofpclass(inf sub norm nzero) %pzero.or.nan) {
; CHECK-LABEL: define nofpclass(snan) float @ret_not_inf_or_nan__fmul_ninf__pzero_or_nan(
; CHECK-SAME: float nofpclass(nan) [[NOT_NAN:%.*]], float nofpclass(inf nzero sub norm) [[PZERO_OR_NAN:%.*]]) {
; CHECK-NEXT:    [[MUL:%.*]] = call ninf float @llvm.copysign.f32(float [[PZERO_OR_NAN]], float [[NOT_NAN]])
; CHECK-NEXT:    ret float [[MUL]]
;
  %mul = fmul ninf float %not.nan, %pzero.or.nan
  ret float %mul
}

define nofpclass(nan inf norm sub) float @zero_result_demands_sub_source_lhs(i1 %cond, float %unknown0, float %unknown1) {
; CHECK-LABEL: define nofpclass(nan inf sub norm) float @zero_result_demands_sub_source_lhs(
; CHECK-SAME: i1 [[COND:%.*]], float [[UNKNOWN0:%.*]], float [[UNKNOWN1:%.*]]) {
; CHECK-NEXT:    [[SUB:%.*]] = call float @returns_sub()
; CHECK-NEXT:    [[SELECT:%.*]] = select i1 [[COND]], float [[SUB]], float [[UNKNOWN0]]
; CHECK-NEXT:    [[MUL:%.*]] = fmul nnan ninf float [[SELECT]], [[UNKNOWN1]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %sub = call float @returns_sub()
  %select = select i1 %cond, float %sub, float %unknown0
  %mul = fmul float %select, %unknown1
  ret float %mul
}

define nofpclass(nan inf norm sub) float @zero_result_demands_sub_source_rhs(i1 %cond, float %unknown0, float %unknown1) {
; CHECK-LABEL: define nofpclass(nan inf sub norm) float @zero_result_demands_sub_source_rhs(
; CHECK-SAME: i1 [[COND:%.*]], float [[UNKNOWN0:%.*]], float [[UNKNOWN1:%.*]]) {
; CHECK-NEXT:    [[SUB:%.*]] = call float @returns_sub()
; CHECK-NEXT:    [[SELECT:%.*]] = select i1 [[COND]], float [[SUB]], float [[UNKNOWN0]]
; CHECK-NEXT:    [[MUL:%.*]] = fmul nnan ninf float [[UNKNOWN1]], [[SELECT]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %sub = call float @returns_sub()
  %select = select i1 %cond, float %sub, float %unknown0
  %mul = fmul float %unknown1, %select
  ret float %mul
}

define nofpclass(nan inf norm sub) float @zero_result_demands_norm_source_lhs(i1 %cond, float %unknown0, float %unknown1) {
; CHECK-LABEL: define nofpclass(nan inf sub norm) float @zero_result_demands_norm_source_lhs(
; CHECK-SAME: i1 [[COND:%.*]], float [[UNKNOWN0:%.*]], float [[UNKNOWN1:%.*]]) {
; CHECK-NEXT:    [[NORM:%.*]] = call float @returns_norm()
; CHECK-NEXT:    [[SELECT:%.*]] = select i1 [[COND]], float [[NORM]], float [[UNKNOWN0]]
; CHECK-NEXT:    [[MUL:%.*]] = fmul nnan ninf float [[SELECT]], [[UNKNOWN1]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %norm = call float @returns_norm()
  %select = select i1 %cond, float %norm, float %unknown0
  %mul = fmul float %select, %unknown1
  ret float %mul
}

define nofpclass(nan inf norm sub) float @zero_result_demands_norm_source_rhs(i1 %cond, float %unknown0, float %unknown1) {
; CHECK-LABEL: define nofpclass(nan inf sub norm) float @zero_result_demands_norm_source_rhs(
; CHECK-SAME: i1 [[COND:%.*]], float [[UNKNOWN0:%.*]], float [[UNKNOWN1:%.*]]) {
; CHECK-NEXT:    [[NORM:%.*]] = call float @returns_norm()
; CHECK-NEXT:    [[SELECT:%.*]] = select i1 [[COND]], float [[NORM]], float [[UNKNOWN0]]
; CHECK-NEXT:    [[MUL:%.*]] = fmul nnan ninf float [[UNKNOWN1]], [[SELECT]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %norm = call float @returns_norm()
  %select = select i1 %cond, float %norm, float %unknown0
  %mul = fmul float %unknown1, %select
  ret float %mul
}

define nofpclass(nan inf norm zero) float @sub_result_demands_norm_source_lhs(i1 %cond, float %unknown0, float %unknown1) {
; CHECK-LABEL: define nofpclass(nan inf zero norm) float @sub_result_demands_norm_source_lhs(
; CHECK-SAME: i1 [[COND:%.*]], float [[UNKNOWN0:%.*]], float [[UNKNOWN1:%.*]]) {
; CHECK-NEXT:    [[NORM:%.*]] = call float @returns_norm()
; CHECK-NEXT:    [[SELECT:%.*]] = select i1 [[COND]], float [[NORM]], float [[UNKNOWN0]]
; CHECK-NEXT:    [[MUL:%.*]] = fmul nnan ninf float [[SELECT]], [[UNKNOWN1]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %norm = call float @returns_norm()
  %select = select i1 %cond, float %norm, float %unknown0
  %mul = fmul float %select, %unknown1
  ret float %mul
}

define nofpclass(nan inf norm zero) float @sub_result_demands_norm_source_rhs(i1 %cond, float %unknown0, float %unknown1) {
; CHECK-LABEL: define nofpclass(nan inf zero norm) float @sub_result_demands_norm_source_rhs(
; CHECK-SAME: i1 [[COND:%.*]], float [[UNKNOWN0:%.*]], float [[UNKNOWN1:%.*]]) {
; CHECK-NEXT:    [[NORM:%.*]] = call float @returns_norm()
; CHECK-NEXT:    [[SELECT:%.*]] = select i1 [[COND]], float [[NORM]], float [[UNKNOWN0]]
; CHECK-NEXT:    [[MUL:%.*]] = fmul nnan ninf float [[UNKNOWN1]], [[SELECT]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %norm = call float @returns_norm()
  %select = select i1 %cond, float %norm, float %unknown0
  %mul = fmul float %unknown1, %select
  ret float %mul
}

define nofpclass(nan inf sub zero) float @norm_result_demands_sub_source_lhs(i1 %cond, float %unknown0, float %unknown1) {
; CHECK-LABEL: define nofpclass(nan inf zero sub) float @norm_result_demands_sub_source_lhs(
; CHECK-SAME: i1 [[COND:%.*]], float [[UNKNOWN0:%.*]], float [[UNKNOWN1:%.*]]) {
; CHECK-NEXT:    [[SUB:%.*]] = call float @returns_sub()
; CHECK-NEXT:    [[SELECT:%.*]] = select i1 [[COND]], float [[SUB]], float [[UNKNOWN0]]
; CHECK-NEXT:    [[MUL:%.*]] = fmul nnan ninf float [[SELECT]], [[UNKNOWN1]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %sub = call float @returns_sub()
  %select = select i1 %cond, float %sub, float %unknown0
  %mul = fmul float %select, %unknown1
  ret float %mul
}

define nofpclass(nan inf sub zero) float @norm_result_demands_sub_source_rhs(i1 %cond, float %unknown0, float %unknown1) {
; CHECK-LABEL: define nofpclass(nan inf zero sub) float @norm_result_demands_sub_source_rhs(
; CHECK-SAME: i1 [[COND:%.*]], float [[UNKNOWN0:%.*]], float [[UNKNOWN1:%.*]]) {
; CHECK-NEXT:    [[SUB:%.*]] = call float @returns_sub()
; CHECK-NEXT:    [[SELECT:%.*]] = select i1 [[COND]], float [[SUB]], float [[UNKNOWN0]]
; CHECK-NEXT:    [[MUL:%.*]] = fmul nnan ninf float [[UNKNOWN1]], [[SELECT]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %sub = call float @returns_sub()
  %select = select i1 %cond, float %sub, float %unknown0
  %mul = fmul float %unknown1, %select
  ret float %mul
}

define nofpclass(snan) float @qnan_result_square_demands_snan(i1 noundef %cond, float noundef %unknown0) {
; CHECK-LABEL: define nofpclass(snan) float @qnan_result_square_demands_snan(
; CHECK-SAME: i1 noundef [[COND:%.*]], float noundef [[UNKNOWN0:%.*]]) {
; CHECK-NEXT:    [[SNAN:%.*]] = call noundef float @returns_snan()
; CHECK-NEXT:    [[SELECT:%.*]] = select i1 [[COND]], float [[SNAN]], float [[UNKNOWN0]]
; CHECK-NEXT:    [[MUL:%.*]] = fmul float [[SELECT]], [[SELECT]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %snan = call noundef float @returns_snan()
  %select = select i1 %cond, float %snan, float %unknown0
  %mul = fmul float %select, %select
  ret float %mul
}

define nofpclass(snan) float @qnan_result_demands_snan_lhs(i1 %cond, float %unknown0, float %unknown1) {
; CHECK-LABEL: define nofpclass(snan) float @qnan_result_demands_snan_lhs(
; CHECK-SAME: i1 [[COND:%.*]], float [[UNKNOWN0:%.*]], float [[UNKNOWN1:%.*]]) {
; CHECK-NEXT:    [[SNAN:%.*]] = call float @returns_snan()
; CHECK-NEXT:    [[SELECT:%.*]] = select i1 [[COND]], float [[SNAN]], float [[UNKNOWN0]]
; CHECK-NEXT:    [[MUL:%.*]] = fmul float [[SELECT]], [[UNKNOWN1]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %snan = call float @returns_snan()
  %select = select i1 %cond, float %snan, float %unknown0
  %mul = fmul float %select, %unknown1
  ret float %mul
}

define nofpclass(snan) float @qnan_result_demands_snan_rhs(i1 %cond, float %unknown0, float %unknown1) {
; CHECK-LABEL: define nofpclass(snan) float @qnan_result_demands_snan_rhs(
; CHECK-SAME: i1 [[COND:%.*]], float [[UNKNOWN0:%.*]], float [[UNKNOWN1:%.*]]) {
; CHECK-NEXT:    [[SNAN:%.*]] = call float @returns_snan()
; CHECK-NEXT:    [[SELECT:%.*]] = select i1 [[COND]], float [[SNAN]], float [[UNKNOWN0]]
; CHECK-NEXT:    [[MUL:%.*]] = fmul float [[UNKNOWN1]], [[SELECT]]
; CHECK-NEXT:    ret float [[MUL]]
;
  %snan = call float @returns_snan()
  %select = select i1 %cond, float %snan, float %unknown0
  %mul = fmul float %unknown1, %select
  ret float %mul
}

attributes #0 = { denormal_fpenv(preservesign) }
attributes #1 = { denormal_fpenv(dynamic) }