; 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(norm inf nan nzero nsub) float @returns_pzero_psub()
declare nofpclass(norm inf nan zero nsub) float @returns_psub()
declare nofpclass(norm inf nan zero psub) float @returns_nsub()
declare nofpclass(norm inf nan zero) float @returns_sub()
declare nofpclass(norm inf nan zero) <2 x float> @returns_sub_vec()
declare nofpclass(norm inf nan) float @returns_sub_zero()
declare nofpclass(qnan) float @returns_maybe_snan()
declare nofpclass(qnan zero norm sub inf) float @returns_snan()
declare nofpclass(inf nan zero) float @returns_sub_norm()
declare nofpclass(nnorm inf nan zero nsub) float @returns_psub_pnorm()
declare nofpclass(pnorm inf nan zero psub) float @returns_nsub_nnorm()

; Does not require special handling of canonicalize.
define nofpclass(inf) float @ret_nofpclass_inf__canonicalize_select_pinf_rhs(i1 %cond, float %x) {
; CHECK-LABEL: define nofpclass(inf) float @ret_nofpclass_inf__canonicalize_select_pinf_rhs(
; CHECK-SAME: i1 [[COND:%.*]], float [[X:%.*]]) {
; CHECK-NEXT:    [[TMP1:%.*]] = call ninf float @llvm.canonicalize.f32(float [[X]])
; CHECK-NEXT:    ret float [[TMP1]]
;
  %select = select i1 %cond, float %x, float 0x7FF0000000000000
  %canon = call float @llvm.canonicalize.f32(float %select)
  ret float %canon
}

define nofpclass(nan pzero) float @ret_nofpclass_nan_pzero__canonicalize_select_psub_pnorm_daz(float %x, i1 %cond) #0 {
; CHECK-LABEL: define nofpclass(nan pzero) float @ret_nofpclass_nan_pzero__canonicalize_select_psub_pnorm_daz(
; CHECK-SAME: float [[X:%.*]], i1 [[COND:%.*]]) #[[ATTR0:[0-9]+]] {
; CHECK-NEXT:    [[PSUB:%.*]] = call float @returns_psub_pnorm()
; CHECK-NEXT:    [[SELECT:%.*]] = select i1 [[COND]], float [[X]], float [[PSUB]]
; CHECK-NEXT:    [[CANON:%.*]] = call nnan float @llvm.canonicalize.f32(float [[SELECT]])
; CHECK-NEXT:    ret float [[CANON]]
;
  %psub = call float @returns_psub_pnorm()
  %select = select i1 %cond, float %x, float %psub
  %canon = call float @llvm.canonicalize.f32(float %select)
  ret float %canon
}

define nofpclass(nan nzero) float @ret_nofpclass_nan_nzero__canonicalize_select_nsub_nnorm_daz(float %x, i1 %cond) #0 {
; CHECK-LABEL: define nofpclass(nan nzero) float @ret_nofpclass_nan_nzero__canonicalize_select_nsub_nnorm_daz(
; CHECK-SAME: float [[X:%.*]], i1 [[COND:%.*]]) #[[ATTR0]] {
; CHECK-NEXT:    [[NSUB:%.*]] = call float @returns_nsub_nnorm()
; CHECK-NEXT:    [[SELECT:%.*]] = select i1 [[COND]], float [[X]], float [[NSUB]]
; CHECK-NEXT:    [[CANON:%.*]] = call nnan float @llvm.canonicalize.f32(float [[SELECT]])
; CHECK-NEXT:    ret float [[CANON]]
;
  %nsub = call float @returns_nsub_nnorm()
  %select = select i1 %cond, float %x, float %nsub
  %canon = call float @llvm.canonicalize.f32(float %select)
  ret float %canon
}

define nofpclass(nan zero) float @ret_nofpclass_nan_zero__canonicalize_select_sub_norm_daz(float %x, i1 %cond) #0 {
; CHECK-LABEL: define nofpclass(nan zero) float @ret_nofpclass_nan_zero__canonicalize_select_sub_norm_daz(
; CHECK-SAME: float [[X:%.*]], i1 [[COND:%.*]]) #[[ATTR0]] {
; CHECK-NEXT:    [[SUB:%.*]] = call float @returns_sub_norm()
; CHECK-NEXT:    [[SELECT:%.*]] = select i1 [[COND]], float [[X]], float [[SUB]]
; CHECK-NEXT:    ret float [[SELECT]]
;
  %sub = call float @returns_sub_norm()
  %select = select i1 %cond, float %x, float %sub
  %canon = call float @llvm.canonicalize.f32(float %select)
  ret float %canon
}

define nofpclass(nan pzero) float @ret_nofpclass_nan_pzero__canonicalize_select_psub_daz(float %x, i1 %cond) #0 {
; CHECK-LABEL: define nofpclass(nan pzero) float @ret_nofpclass_nan_pzero__canonicalize_select_psub_daz(
; CHECK-SAME: float [[X:%.*]], i1 [[COND:%.*]]) #[[ATTR0]] {
; CHECK-NEXT:    [[PSUB:%.*]] = call float @returns_psub()
; CHECK-NEXT:    [[CANON:%.*]] = call nnan float @llvm.canonicalize.f32(float [[X]])
; CHECK-NEXT:    ret float [[CANON]]
;
  %psub = call float @returns_psub()
  %select = select i1 %cond, float %x, float %psub
  %canon = call float @llvm.canonicalize.f32(float %select)
  ret float %canon
}

define nofpclass(nan nzero) float @ret_nofpclass_nan_nzero__canonicalize_select_nsub_daz(float %x, i1 %cond) #0 {
; CHECK-LABEL: define nofpclass(nan nzero) float @ret_nofpclass_nan_nzero__canonicalize_select_nsub_daz(
; CHECK-SAME: float [[X:%.*]], i1 [[COND:%.*]]) #[[ATTR0]] {
; CHECK-NEXT:    [[NSUB:%.*]] = call float @returns_nsub()
; CHECK-NEXT:    [[CANON:%.*]] = call nnan float @llvm.canonicalize.f32(float [[X]])
; CHECK-NEXT:    ret float [[CANON]]
;
  %nsub = call float @returns_nsub()
  %select = select i1 %cond, float %x, float %nsub
  %canon = call float @llvm.canonicalize.f32(float %select)
  ret float %canon
}

define nofpclass(nan zero) float @ret_nofpclass_nan_zero__canonicalize_select_sub_daz(float %x, i1 %cond) #0 {
; CHECK-LABEL: define nofpclass(nan zero) float @ret_nofpclass_nan_zero__canonicalize_select_sub_daz(
; CHECK-SAME: float [[X:%.*]], i1 [[COND:%.*]]) #[[ATTR0]] {
; CHECK-NEXT:    [[SUB:%.*]] = call float @returns_sub()
; CHECK-NEXT:    ret float [[X]]
;
  %sub = call float @returns_sub()
  %select = select i1 %cond, float %x, float %sub
  %canon = call float @llvm.canonicalize.f32(float %select)
  ret float %canon
}

define nofpclass(nan) float @ret_nofpclass_nan__canonicalize_only_psub_ieee() {
; CHECK-LABEL: define nofpclass(nan) float @ret_nofpclass_nan__canonicalize_only_psub_ieee() {
; CHECK-NEXT:    [[PSUB:%.*]] = call float @returns_psub()
; CHECK-NEXT:    ret float [[PSUB]]
;
  %psub = call float @returns_psub()
  %canon = call float @llvm.canonicalize.f32(float %psub)
  ret float %canon
}

define nofpclass(nan) float @ret_nofpclass_nan__canonicalize_only_nsub_ieee() {
; CHECK-LABEL: define nofpclass(nan) float @ret_nofpclass_nan__canonicalize_only_nsub_ieee() {
; CHECK-NEXT:    [[NSUB:%.*]] = call float @returns_nsub()
; CHECK-NEXT:    ret float [[NSUB]]
;
  %nsub = call float @returns_nsub()
  %canon = call float @llvm.canonicalize.f32(float %nsub)
  ret float %canon
}

define nofpclass(nan) float @ret_nofpclass_nan__canonicalize_only_sub_ieee() {
; CHECK-LABEL: define nofpclass(nan) float @ret_nofpclass_nan__canonicalize_only_sub_ieee() {
; CHECK-NEXT:    [[SUB:%.*]] = call float @returns_sub()
; CHECK-NEXT:    ret float [[SUB]]
;
  %sub = call float @returns_sub()
  %canon = call float @llvm.canonicalize.f32(float %sub)
  ret float %canon
}

define nofpclass(nan) float @ret_nofpclass_nan__canonicalize_only_psub_daz() #0 {
; CHECK-LABEL: define nofpclass(nan) float @ret_nofpclass_nan__canonicalize_only_psub_daz(
; CHECK-SAME: ) #[[ATTR0]] {
; CHECK-NEXT:    [[PSUB:%.*]] = call float @returns_psub()
; CHECK-NEXT:    ret float 0.000000e+00
;
  %psub = call float @returns_psub()
  %canon = call float @llvm.canonicalize.f32(float %psub)
  ret float %canon
}

define nofpclass(nan) float @ret_nofpclass_nan__canonicalize_only_nsub_daz() #0 {
; CHECK-LABEL: define nofpclass(nan) float @ret_nofpclass_nan__canonicalize_only_nsub_daz(
; CHECK-SAME: ) #[[ATTR0]] {
; CHECK-NEXT:    [[NSUB:%.*]] = call float @returns_nsub()
; CHECK-NEXT:    ret float -0.000000e+00
;
  %nsub = call float @returns_nsub()
  %canon = call float @llvm.canonicalize.f32(float %nsub)
  ret float %canon
}

define nofpclass(nan) float @ret_nofpclass_nan__canonicalize_only_sub_daz() #0 {
; CHECK-LABEL: define nofpclass(nan) float @ret_nofpclass_nan__canonicalize_only_sub_daz(
; CHECK-SAME: ) #[[ATTR0]] {
; CHECK-NEXT:    [[SUB:%.*]] = call float @returns_sub()
; CHECK-NEXT:    [[CANON:%.*]] = call nnan ninf float @llvm.canonicalize.f32(float [[SUB]])
; CHECK-NEXT:    ret float [[CANON]]
;
  %sub = call float @returns_sub()
  %canon = call float @llvm.canonicalize.f32(float %sub)
  ret float %canon
}

define nofpclass(zero) <2 x float> @ret_nofpclass_zero__canonicalize_daz_vec(<2 x float> %x, <2 x i1> %cond) #0 {
; CHECK-LABEL: define nofpclass(zero) <2 x float> @ret_nofpclass_zero__canonicalize_daz_vec(
; CHECK-SAME: <2 x float> [[X:%.*]], <2 x i1> [[COND:%.*]]) #[[ATTR0]] {
; CHECK-NEXT:    [[SUB:%.*]] = call <2 x float> @returns_sub_vec()
; CHECK-NEXT:    [[CANON:%.*]] = call <2 x float> @llvm.canonicalize.v2f32(<2 x float> [[X]])
; CHECK-NEXT:    ret <2 x float> [[CANON]]
;
  %sub = call <2 x float> @returns_sub_vec()
  %select = select <2 x i1> %cond, <2 x float> %x, <2 x float> %sub
  %canon = call <2 x float> @llvm.canonicalize.v2f32(<2 x float> %select)
  ret <2 x float> %canon
}

define nofpclass(zero sub) float @ret_nofpclass_sub_zero__canonicalize_daz(float %x, i1 %cond) #0 {
; CHECK-LABEL: define nofpclass(zero sub) float @ret_nofpclass_sub_zero__canonicalize_daz(
; CHECK-SAME: float [[X:%.*]], i1 [[COND:%.*]]) #[[ATTR0]] {
; CHECK-NEXT:    [[SUB_OR_ZERO:%.*]] = call float @returns_sub_zero()
; CHECK-NEXT:    [[CANON:%.*]] = call float @llvm.canonicalize.f32(float [[X]])
; CHECK-NEXT:    ret float [[CANON]]
;
  %sub_or_zero = call float @returns_sub_zero()
  %select = select i1 %cond, float %x, float %sub_or_zero
  %canon = call float @llvm.canonicalize.f32(float %select)
  ret float %canon
}

define nofpclass(nan) float @ret_nofpclass_nan__canonicalize_ieee(float %unknown) {
; CHECK-LABEL: define nofpclass(nan) float @ret_nofpclass_nan__canonicalize_ieee(
; CHECK-SAME: float [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    ret float [[UNKNOWN]]
;
  %canon = call float @llvm.canonicalize.f32(float %unknown)
  ret float %canon
}

define nofpclass(qnan) float @ret_nofpclass_qnan__canonicalize_ieee(float %unknown) {
; CHECK-LABEL: define nofpclass(qnan) float @ret_nofpclass_qnan__canonicalize_ieee(
; CHECK-SAME: float [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[CANON:%.*]] = call float @llvm.canonicalize.f32(float [[UNKNOWN]])
; CHECK-NEXT:    ret float [[CANON]]
;
  %canon = call float @llvm.canonicalize.f32(float %unknown)
  ret float %canon
}

define nofpclass(nan) float @ret_nofpclass_nan__canonicalize_daz(float %unknown) #0 {
; CHECK-LABEL: define nofpclass(nan) float @ret_nofpclass_nan__canonicalize_daz(
; CHECK-SAME: float [[UNKNOWN:%.*]]) #[[ATTR0]] {
; CHECK-NEXT:    [[CANON:%.*]] = call nnan float @llvm.canonicalize.f32(float [[UNKNOWN]])
; CHECK-NEXT:    ret float [[CANON]]
;
  %canon = call float @llvm.canonicalize.f32(float %unknown)
  ret float %canon
}

define nofpclass(nan) float @ret_nofpclass_nan__canonicalize_dynamic(float %unknown) #1 {
; CHECK-LABEL: define nofpclass(nan) float @ret_nofpclass_nan__canonicalize_dynamic(
; CHECK-SAME: float [[UNKNOWN:%.*]]) #[[ATTR1:[0-9]+]] {
; CHECK-NEXT:    [[CANON:%.*]] = call nnan float @llvm.canonicalize.f32(float [[UNKNOWN]])
; CHECK-NEXT:    ret float [[CANON]]
;
  %canon = call float @llvm.canonicalize.f32(float %unknown)
  ret float %canon
}

; Only snan not sufficent to strip canonicalize
define nofpclass(snan) float @ret_nofpclass_snan__canonicalize_ieee(float %unknown) {
; CHECK-LABEL: define nofpclass(snan) float @ret_nofpclass_snan__canonicalize_ieee(
; CHECK-SAME: float [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[CANON:%.*]] = call float @llvm.canonicalize.f32(float [[UNKNOWN]])
; CHECK-NEXT:    ret float [[CANON]]
;
  %canon = call float @llvm.canonicalize.f32(float %unknown)
  ret float %canon
}

; Only qnan not sufficent to strip canonicalize
define nofpclass(qnan) float @ret_nofpclass_anan__canonicalize_ieee(float %unknown) {
; CHECK-LABEL: define nofpclass(qnan) float @ret_nofpclass_anan__canonicalize_ieee(
; CHECK-SAME: float [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[CANON:%.*]] = call float @llvm.canonicalize.f32(float [[UNKNOWN]])
; CHECK-NEXT:    ret float [[CANON]]
;
  %canon = call float @llvm.canonicalize.f32(float %unknown)
  ret float %canon
}

; Ignore fp80, leave canonicalize.
define nofpclass(nan) x86_fp80 @ret_nofpclass_zero_sub_canonicalize_fp80_daz(x86_fp80 %unknown) {
; CHECK-LABEL: define nofpclass(nan) x86_fp80 @ret_nofpclass_zero_sub_canonicalize_fp80_daz(
; CHECK-SAME: x86_fp80 [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[CANON:%.*]] = call x86_fp80 @llvm.canonicalize.f80(x86_fp80 [[UNKNOWN]])
; CHECK-NEXT:    ret x86_fp80 [[CANON]]
;
  %canon = call x86_fp80 @llvm.canonicalize.f80(x86_fp80 %unknown)
  ret x86_fp80 %canon
}

define nofpclass(nan sub) float @ret_nofpclass_nan_sub__canonicalize_dynamic(float %unknown) #1 {
; CHECK-LABEL: define nofpclass(nan sub) float @ret_nofpclass_nan_sub__canonicalize_dynamic(
; CHECK-SAME: float [[UNKNOWN:%.*]]) #[[ATTR1]] {
; CHECK-NEXT:    [[CANON:%.*]] = call nnan float @llvm.canonicalize.f32(float [[UNKNOWN]])
; CHECK-NEXT:    ret float [[CANON]]
;
  %canon = call float @llvm.canonicalize.f32(float %unknown)
  ret float %canon
}

; Cannot do anything. No signaling nan result doesn't tell us anything.
define nofpclass(snan) float @ret_nofpclass_snan__canonicalize_select_unknown_or_snan(float %x, i1 %cond) {
; CHECK-LABEL: define nofpclass(snan) float @ret_nofpclass_snan__canonicalize_select_unknown_or_snan(
; CHECK-SAME: float [[X:%.*]], i1 [[COND:%.*]]) {
; CHECK-NEXT:    [[SNAN:%.*]] = call float @returns_snan()
; CHECK-NEXT:    [[SELECT:%.*]] = select i1 [[COND]], float [[X]], float [[SNAN]]
; CHECK-NEXT:    [[CANON:%.*]] = call float @llvm.canonicalize.f32(float [[SELECT]])
; CHECK-NEXT:    ret float [[CANON]]
;
  %snan = call float @returns_snan()
  %select = select i1 %cond, float %x, float %snan
  %canon = call float @llvm.canonicalize.f32(float %select)
  ret float %canon
}

; Fold to canonicalize of %x. The result cannot be a qnan, so it
; cannot be the signaling nan select result.
define nofpclass(qnan) float @ret_nofpclass_qnan__canonicalize_select_unknown_or_snan(float %x, i1 %cond) {
; CHECK-LABEL: define nofpclass(qnan) float @ret_nofpclass_qnan__canonicalize_select_unknown_or_snan(
; CHECK-SAME: float [[X:%.*]], i1 [[COND:%.*]]) {
; CHECK-NEXT:    [[SNAN:%.*]] = call float @returns_snan()
; CHECK-NEXT:    [[SELECT:%.*]] = select i1 [[COND]], float [[X]], float [[SNAN]]
; CHECK-NEXT:    [[CANON:%.*]] = call float @llvm.canonicalize.f32(float [[SELECT]])
; CHECK-NEXT:    ret float [[CANON]]
;
  %snan = call float @returns_snan()
  %select = select i1 %cond, float %x, float %snan
  %canon = call float @llvm.canonicalize.f32(float %select)
  ret float %canon
}

; Can fold to direct use of %x
define nofpclass(nan) float @ret_nofpclass_nan__canonicalize_select_unknown_or_snan(float %x, i1 %cond) {
; CHECK-LABEL: define nofpclass(nan) float @ret_nofpclass_nan__canonicalize_select_unknown_or_snan(
; CHECK-SAME: float [[X:%.*]], i1 [[COND:%.*]]) {
; CHECK-NEXT:    [[SNAN:%.*]] = call float @returns_snan()
; CHECK-NEXT:    ret float [[X]]
;
  %snan = call float @returns_snan()
  %select = select i1 %cond, float %x, float %snan
  %canon = call float @llvm.canonicalize.f32(float %select)
  ret float %canon
}

define nofpclass(zero) float @ret_nofpclass_zero_nnan_flag__canonicalize_select_unknown_or_snan(float %x, i1 %cond) {
; CHECK-LABEL: define nofpclass(zero) float @ret_nofpclass_zero_nnan_flag__canonicalize_select_unknown_or_snan(
; CHECK-SAME: float [[X:%.*]], i1 [[COND:%.*]]) {
; CHECK-NEXT:    [[SNAN:%.*]] = call float @returns_snan()
; CHECK-NEXT:    [[SELECT:%.*]] = select i1 [[COND]], float [[X]], float [[SNAN]]
; CHECK-NEXT:    [[CANON:%.*]] = call float @llvm.canonicalize.f32(float [[SELECT]])
; CHECK-NEXT:    ret float [[CANON]]
;
  %snan = call float @returns_snan()
  %select = select i1 %cond, float %x, float %snan
  %canon = call float @llvm.canonicalize.f32(float %select)
  ret float %canon
}

; With IEEE handling the canonicalize can be dropped.
;
; FIXME: This doesn't really require the nofpclass on the return, but
; we don't attempt SimplifyDemandedFPClass without it.
define nofpclass(zero) float @ret_nofpclass_zero__canonicalize_nnan_src_ieee(float nofpclass(nan) %x, i1 %cond) {
; CHECK-LABEL: define nofpclass(zero) float @ret_nofpclass_zero__canonicalize_nnan_src_ieee(
; CHECK-SAME: float nofpclass(nan) [[X:%.*]], i1 [[COND:%.*]]) {
; CHECK-NEXT:    ret float [[X]]
;
  %canon = call float @llvm.canonicalize.f32(float %x)
  ret float %canon
}

; Must preserve canonicalize with DAZ
define nofpclass(zero) float @ret_nofpclass_zero__canonicalize_nnan_src_daz(float nofpclass(nan) %x, i1 %cond) #0 {
; CHECK-LABEL: define nofpclass(zero) float @ret_nofpclass_zero__canonicalize_nnan_src_daz(
; CHECK-SAME: float nofpclass(nan) [[X:%.*]], i1 [[COND:%.*]]) #[[ATTR0]] {
; CHECK-NEXT:    ret float [[X]]
;
  %canon = call float @llvm.canonicalize.f32(float %x)
  ret float %canon
}

define nofpclass(zero) float @ret_nofpclass_zero__canonicalize_no_sub_src_daz(float nofpclass(sub) %x, i1 %cond) #0 {
; CHECK-LABEL: define nofpclass(zero) float @ret_nofpclass_zero__canonicalize_no_sub_src_daz(
; CHECK-SAME: float nofpclass(sub) [[X:%.*]], i1 [[COND:%.*]]) #[[ATTR0]] {
; CHECK-NEXT:    [[CANON:%.*]] = call float @llvm.canonicalize.f32(float [[X]])
; CHECK-NEXT:    ret float [[CANON]]
;
  %canon = call float @llvm.canonicalize.f32(float %x)
  ret float %canon
}

define nofpclass(zero) float @ret_nofpclass_zero__canonicalize_no_sub_no_nan_src_daz(float nofpclass(nan sub) %x, i1 %cond) #0 {
; CHECK-LABEL: define nofpclass(zero) float @ret_nofpclass_zero__canonicalize_no_sub_no_nan_src_daz(
; CHECK-SAME: float nofpclass(nan sub) [[X:%.*]], i1 [[COND:%.*]]) #[[ATTR0]] {
; CHECK-NEXT:    ret float [[X]]
;
  %canon = call float @llvm.canonicalize.f32(float %x)
  ret float %canon
}

define nofpclass(zero) float @ret_nofpclass_zero__canonicalize_no_sub_no_nan_src_dynamic(float nofpclass(nan sub) %x, i1 %cond) #1 {
; CHECK-LABEL: define nofpclass(zero) float @ret_nofpclass_zero__canonicalize_no_sub_no_nan_src_dynamic(
; CHECK-SAME: float nofpclass(nan sub) [[X:%.*]], i1 [[COND:%.*]]) #[[ATTR1]] {
; CHECK-NEXT:    ret float [[X]]
;
  %canon = call float @llvm.canonicalize.f32(float %x)
  ret float %canon
}

; Input cannot be subnormal and result cannot be nan, so canonicalize is droppable
define nofpclass(nan) float @ret_nofpclass_nan__canonicalize_no_sub_src_daz(float nofpclass(sub) %x, i1 %cond) #0 {
; CHECK-LABEL: define nofpclass(nan) float @ret_nofpclass_nan__canonicalize_no_sub_src_daz(
; CHECK-SAME: float nofpclass(sub) [[X:%.*]], i1 [[COND:%.*]]) #[[ATTR0]] {
; CHECK-NEXT:    ret float [[X]]
;
  %canon = call float @llvm.canonicalize.f32(float %x)
  ret float %canon
}

; No qnan result is sufficient.
define nofpclass(qnan) float @ret_nofpclass_qnan__canonicalize_no_sub_src_daz(float nofpclass(sub) %x, i1 %cond) #0 {
; CHECK-LABEL: define nofpclass(qnan) float @ret_nofpclass_qnan__canonicalize_no_sub_src_daz(
; CHECK-SAME: float nofpclass(sub) [[X:%.*]], i1 [[COND:%.*]]) #[[ATTR0]] {
; CHECK-NEXT:    [[CANON:%.*]] = call float @llvm.canonicalize.f32(float [[X]])
; CHECK-NEXT:    ret float [[CANON]]
;
  %canon = call float @llvm.canonicalize.f32(float %x)
  ret float %canon
}

define nofpclass(snan) float @ret_nofpclass_snan__canonicalize_no_sub_src_daz(float nofpclass(sub) %x, i1 %cond) #0 {
; CHECK-LABEL: define nofpclass(snan) float @ret_nofpclass_snan__canonicalize_no_sub_src_daz(
; CHECK-SAME: float nofpclass(sub) [[X:%.*]], i1 [[COND:%.*]]) #[[ATTR0]] {
; CHECK-NEXT:    [[CANON:%.*]] = call float @llvm.canonicalize.f32(float [[X]])
; CHECK-NEXT:    ret float [[CANON]]
;
  %canon = call float @llvm.canonicalize.f32(float %x)
  ret float %canon
}

; Input cannot be subnormal and result cannot be nan, so canonicalize is droppable
define nofpclass(nan) float @ret_nofpclass_nan__canonicalize_no_sub_src_dynamic(float nofpclass(sub) %x, i1 %cond) #1 {
; CHECK-LABEL: define nofpclass(nan) float @ret_nofpclass_nan__canonicalize_no_sub_src_dynamic(
; CHECK-SAME: float nofpclass(sub) [[X:%.*]], i1 [[COND:%.*]]) #[[ATTR1]] {
; CHECK-NEXT:    ret float [[X]]
;
  %canon = call float @llvm.canonicalize.f32(float %x)
  ret float %canon
}

define nofpclass(nan) float @ret_nofpclass_nan__canonicalize_only_nsub_dapz() #2 {
; CHECK-LABEL: define nofpclass(nan) float @ret_nofpclass_nan__canonicalize_only_nsub_dapz(
; CHECK-SAME: ) #[[ATTR2:[0-9]+]] {
; CHECK-NEXT:    [[NSUB:%.*]] = call float @returns_nsub()
; CHECK-NEXT:    ret float 0.000000e+00
;
  %nsub = call float @returns_nsub()
  %canon = call float @llvm.canonicalize.f32(float %nsub)
  ret float %canon
}

define nofpclass(nan) float @ret_nofpclass_nan__canonicalize_only_psub_dapz() #2 {
; CHECK-LABEL: define nofpclass(nan) float @ret_nofpclass_nan__canonicalize_only_psub_dapz(
; CHECK-SAME: ) #[[ATTR2]] {
; CHECK-NEXT:    [[PSUB:%.*]] = call float @returns_psub()
; CHECK-NEXT:    ret float 0.000000e+00
;
  %psub = call float @returns_psub()
  %canon = call float @llvm.canonicalize.f32(float %psub)
  ret float %canon
}

define nofpclass(nan) float @ret_nofpclass_nan__canonicalize_only_sub_dapz() #2 {
; CHECK-LABEL: define nofpclass(nan) float @ret_nofpclass_nan__canonicalize_only_sub_dapz(
; CHECK-SAME: ) #[[ATTR2]] {
; CHECK-NEXT:    [[SUB:%.*]] = call float @returns_sub()
; CHECK-NEXT:    ret float 0.000000e+00
;
  %sub = call float @returns_sub()
  %canon = call float @llvm.canonicalize.f32(float %sub)
  ret float %canon
}

define nofpclass(nan) float @ret_nofpclass_nan__canonicalize_only_nsub_dynamic() #1 {
; CHECK-LABEL: define nofpclass(nan) float @ret_nofpclass_nan__canonicalize_only_nsub_dynamic(
; CHECK-SAME: ) #[[ATTR1]] {
; CHECK-NEXT:    [[NSUB:%.*]] = call float @returns_nsub()
; CHECK-NEXT:    [[CANON:%.*]] = call nnan ninf float @llvm.canonicalize.f32(float [[NSUB]])
; CHECK-NEXT:    ret float [[CANON]]
;
  %nsub = call float @returns_nsub()
  %canon = call float @llvm.canonicalize.f32(float %nsub)
  ret float %canon
}

define nofpclass(nan) float @ret_nofpclass_nan__canonicalize_only_psub_dynamic() #1 {
; CHECK-LABEL: define nofpclass(nan) float @ret_nofpclass_nan__canonicalize_only_psub_dynamic(
; CHECK-SAME: ) #[[ATTR1]] {
; CHECK-NEXT:    [[PSUB:%.*]] = call float @returns_psub()
; CHECK-NEXT:    [[CANON:%.*]] = call nnan ninf float @llvm.canonicalize.f32(float [[PSUB]])
; CHECK-NEXT:    ret float [[CANON]]
;
  %psub = call float @returns_psub()
  %canon = call float @llvm.canonicalize.f32(float %psub)
  ret float %canon
}

define nofpclass(nan) float @ret_nofpclass_nan__canonicalize_only_sub_dynamic() #1 {
; CHECK-LABEL: define nofpclass(nan) float @ret_nofpclass_nan__canonicalize_only_sub_dynamic(
; CHECK-SAME: ) #[[ATTR1]] {
; CHECK-NEXT:    [[SUB:%.*]] = call float @returns_sub()
; CHECK-NEXT:    [[CANON:%.*]] = call nnan ninf float @llvm.canonicalize.f32(float [[SUB]])
; CHECK-NEXT:    ret float [[CANON]]
;
  %sub = call float @returns_sub()
  %canon = call float @llvm.canonicalize.f32(float %sub)
  ret float %canon
}

define nofpclass(nan) float @ret_nofpclass_nan__canonicalize_only_ninf__dynamic(i1 %cond, float nofpclass(sub norm zero pinf) %must.be.ninf.or.nan) #1 {
; CHECK-LABEL: define nofpclass(nan) float @ret_nofpclass_nan__canonicalize_only_ninf__dynamic(
; CHECK-SAME: i1 [[COND:%.*]], float nofpclass(pinf zero sub norm) [[MUST_BE_NINF_OR_NAN:%.*]]) #[[ATTR1]] {
; CHECK-NEXT:    ret float -inf
;
  %canon = call float @llvm.canonicalize.f32(float %must.be.ninf.or.nan)
  ret float %canon
}

define nofpclass(nan) float @ret_nofpclass_nan__canonicalize_only_pinf__dynamic(i1 %cond, float nofpclass(sub norm zero pinf) %must.be.pinf.or.nan) #1 {
; CHECK-LABEL: define nofpclass(nan) float @ret_nofpclass_nan__canonicalize_only_pinf__dynamic(
; CHECK-SAME: i1 [[COND:%.*]], float nofpclass(pinf zero sub norm) [[MUST_BE_PINF_OR_NAN:%.*]]) #[[ATTR1]] {
; CHECK-NEXT:    ret float -inf
;
  %canon = call float @llvm.canonicalize.f32(float %must.be.pinf.or.nan)
  ret float %canon
}

define nofpclass(nan) float @ret_nofpclass_nan__canonicalize_only_inf__dynamic(i1 %cond, float nofpclass(sub norm zero) %must.be.inf.or.nan) #1 {
; CHECK-LABEL: define nofpclass(nan) float @ret_nofpclass_nan__canonicalize_only_inf__dynamic(
; CHECK-SAME: i1 [[COND:%.*]], float nofpclass(zero sub norm) [[MUST_BE_INF_OR_NAN:%.*]]) #[[ATTR1]] {
; CHECK-NEXT:    ret float [[MUST_BE_INF_OR_NAN]]
;
  %canon = call float @llvm.canonicalize.f32(float %must.be.inf.or.nan)
  ret float %canon
}

define nofpclass(nan) float @ret_nofpclass_nan__canonicalize_only_pzero__dynamic(i1 %cond, float nofpclass(sub norm nzero inf) %must.be.pzero.or.nan) #1 {
; CHECK-LABEL: define nofpclass(nan) float @ret_nofpclass_nan__canonicalize_only_pzero__dynamic(
; CHECK-SAME: i1 [[COND:%.*]], float nofpclass(inf nzero sub norm) [[MUST_BE_PZERO_OR_NAN:%.*]]) #[[ATTR1]] {
; CHECK-NEXT:    ret float 0.000000e+00
;
  %canon = call float @llvm.canonicalize.f32(float %must.be.pzero.or.nan)
  ret float %canon
}

define nofpclass(nan) float @ret_nofpclass_nan__canonicalize_only_nzero__dynamic(i1 %cond, float nofpclass(sub norm pzero inf) %must.be.nzero.or.nan) #1 {
; CHECK-LABEL: define nofpclass(nan) float @ret_nofpclass_nan__canonicalize_only_nzero__dynamic(
; CHECK-SAME: i1 [[COND:%.*]], float nofpclass(inf pzero sub norm) [[MUST_BE_NZERO_OR_NAN:%.*]]) #[[ATTR1]] {
; CHECK-NEXT:    ret float -0.000000e+00
;
  %canon = call float @llvm.canonicalize.f32(float %must.be.nzero.or.nan)
  ret float %canon
}

define nofpclass(nan) float @ret_nofpclass_nan__canonicalize_only_zero__ieee(i1 %cond, float nofpclass(sub norm inf) %must.be.zero.or.nan) {
; CHECK-LABEL: define nofpclass(nan) float @ret_nofpclass_nan__canonicalize_only_zero__ieee(
; CHECK-SAME: i1 [[COND:%.*]], float nofpclass(inf sub norm) [[MUST_BE_ZERO_OR_NAN:%.*]]) {
; CHECK-NEXT:    ret float [[MUST_BE_ZERO_OR_NAN]]
;
  %canon = call float @llvm.canonicalize.f32(float %must.be.zero.or.nan)
  ret float %canon
}

define nofpclass(nan) float @ret_nofpclass_nan__canonicalize_only_zero__dynamic(i1 %cond, float nofpclass(sub norm inf) %must.be.zero.or.nan) #1 {
; CHECK-LABEL: define nofpclass(nan) float @ret_nofpclass_nan__canonicalize_only_zero__dynamic(
; CHECK-SAME: i1 [[COND:%.*]], float nofpclass(inf sub norm) [[MUST_BE_ZERO_OR_NAN:%.*]]) #[[ATTR1]] {
; CHECK-NEXT:    ret float [[MUST_BE_ZERO_OR_NAN]]
;
  %canon = call float @llvm.canonicalize.f32(float %must.be.zero.or.nan)
  ret float %canon
}

define nofpclass(nan) float @ret_nofpclass_nan__canonicalize_only_zero__dapz(i1 %cond, float nofpclass(sub norm inf) %must.be.zero.or.nan) #2 {
; CHECK-LABEL: define nofpclass(nan) float @ret_nofpclass_nan__canonicalize_only_zero__dapz(
; CHECK-SAME: i1 [[COND:%.*]], float nofpclass(inf sub norm) [[MUST_BE_ZERO_OR_NAN:%.*]]) #[[ATTR2]] {
; CHECK-NEXT:    ret float 0.000000e+00
;
  %canon = call float @llvm.canonicalize.f32(float %must.be.zero.or.nan)
  ret float %canon
}

define nofpclass(nan) float @ret_nofpclass_nan__canonicalize_only_sub__dapz(i1 %cond, float nofpclass(zero norm inf) %must.be.sub.or.nan) #2 {
; CHECK-LABEL: define nofpclass(nan) float @ret_nofpclass_nan__canonicalize_only_sub__dapz(
; CHECK-SAME: i1 [[COND:%.*]], float nofpclass(inf zero norm) [[MUST_BE_SUB_OR_NAN:%.*]]) #[[ATTR2]] {
; CHECK-NEXT:    ret float 0.000000e+00
;
  %canon = call float @llvm.canonicalize.f32(float %must.be.sub.or.nan)
  ret float %canon
}

define nofpclass(nan) float @ret_nofpclass_nan__canonicalize_drop_noundef(float %x) #1 {
; CHECK-LABEL: define nofpclass(nan) float @ret_nofpclass_nan__canonicalize_drop_noundef(
; CHECK-SAME: float [[X:%.*]]) #[[ATTR1]] {
; CHECK-NEXT:    [[CANON:%.*]] = call nnan float @llvm.canonicalize.f32(float [[X]])
; CHECK-NEXT:    ret float [[CANON]]
;
  %canon = call noundef float @llvm.canonicalize.f32(float %x), !unknown.md !{}
  ret float %canon
}

define nofpclass(snan) float @qnan_result_demands_snan_src(i1 %cond, float %unknown) {
; CHECK-LABEL: define nofpclass(snan) float @qnan_result_demands_snan_src(
; CHECK-SAME: i1 [[COND:%.*]], float [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[SNAN:%.*]] = call float @returns_snan()
; CHECK-NEXT:    [[SELECT:%.*]] = select i1 [[COND]], float [[SNAN]], float [[UNKNOWN]]
; CHECK-NEXT:    [[RESULT:%.*]] = call float @llvm.canonicalize.f32(float [[SELECT]])
; CHECK-NEXT:    ret float [[RESULT]]
;
  %snan = call float @returns_snan()
  %select = select i1 %cond, float %snan, float %unknown
  %result = call float @llvm.canonicalize.f32(float %select)
  ret float %result
}

attributes #0 = { denormal_fpenv(preservesign) }
attributes #1 = { denormal_fpenv(dynamic) }
attributes #2 = { denormal_fpenv(positivezero|positivezero) }