; 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) half @returns_zero()
declare nofpclass(nan inf nzero sub norm) half @returns_pzero()
declare nofpclass(nan inf pzero sub norm) half @returns_nzero()
declare nofpclass(inf sub norm) half @returns_zero_or_nan()
declare nofpclass(inf nzero sub norm) half @returns_pzero_or_nan()
declare nofpclass(inf pzero sub norm) half @returns_nzero_or_nan()

declare nofpclass(nan zero sub norm) half @returns_inf()
declare nofpclass(nan ninf zero sub norm) half @returns_pinf()
declare nofpclass(nan pinf zero sub norm) half @returns_ninf()
declare nofpclass(zero sub norm) half @returns_inf_or_nan()

declare nofpclass(ninf nzero nsub nnorm) half @returns_positive_or_nan()
declare nofpclass(pinf pzero psub pnorm) half @returns_negative_or_nan()

declare nofpclass(nan ninf nzero nsub nnorm) half @returns_positive()
declare nofpclass(nan pinf pzero psub pnorm) half @returns_negative()

declare nofpclass(inf zero sub norm) half @returns_nan()
declare nofpclass(qnan inf zero sub norm) half @returns_snan()

declare nofpclass(nan inf zero sub) half @returns_norm()
declare nofpclass(nan inf zero sub pnorm) half @returns_nnorm()
declare nofpclass(nan inf zero sub nnorm) half @returns_pnorm()

declare nofpclass(nan inf zero norm) half @returns_sub()
declare nofpclass(nan inf zero psub norm) half @returns_nsub()
declare nofpclass(nan inf zero nsub norm) half @returns_psub()

declare void @use(half)

define nofpclass(inf zero sub norm) half @ret_only_nan(half %x, half %y) {
; CHECK-LABEL: define nofpclass(inf zero sub norm) half @ret_only_nan(
; CHECK-SAME: half [[X:%.*]], half [[Y:%.*]]) {
; CHECK-NEXT:    ret half +qnan
;
  %add = fadd half %x, %y
  ret half %add
}

define nofpclass(snan inf zero sub norm) half @ret_only_qnan(half %x, half %y) {
; CHECK-LABEL: define nofpclass(snan inf zero sub norm) half @ret_only_qnan(
; CHECK-SAME: half [[X:%.*]], half [[Y:%.*]]) {
; CHECK-NEXT:    ret half +qnan
;
  %add = fadd half %x, %y
  ret half %add
}

define nofpclass(qnan inf zero sub norm) half @ret_only_snan(half %x, half %y) {
; CHECK-LABEL: define nofpclass(qnan inf zero sub norm) half @ret_only_snan(
; CHECK-SAME: half [[X:%.*]], half [[Y:%.*]]) {
; CHECK-NEXT:    [[ADD:%.*]] = fadd half [[X]], [[Y]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %add = fadd half %x, %y
  ret half %add
}

define nofpclass(nan inf sub norm) half @ret_only_zero(half %x, half %y) {
; CHECK-LABEL: define nofpclass(nan inf sub norm) half @ret_only_zero(
; CHECK-SAME: half [[X:%.*]], half [[Y:%.*]]) {
; CHECK-NEXT:    [[ADD:%.*]] = fadd nnan ninf half [[X]], [[Y]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %add = fadd half %x, %y
  ret half %add
}

define nofpclass(nan inf nzero sub norm) half @ret_only_pzero(half %x, half %y) {
; CHECK-LABEL: define nofpclass(nan inf nzero sub norm) half @ret_only_pzero(
; CHECK-SAME: half [[X:%.*]], half [[Y:%.*]]) {
; CHECK-NEXT:    ret half 0.000000e+00
;
  %add = fadd half %x, %y
  ret half %add
}

define nofpclass(nan inf pzero sub norm) half @ret_only_nzero(half %x, half %y) {
; CHECK-LABEL: define nofpclass(nan inf pzero sub norm) half @ret_only_nzero(
; CHECK-SAME: half [[X:%.*]], half [[Y:%.*]]) {
; CHECK-NEXT:    ret half -0.000000e+00
;
  %add = fadd half %x, %y
  ret half %add
}

define nofpclass(nan zero sub norm) half @ret_only_inf(half %x, half %y) {
; CHECK-LABEL: define nofpclass(nan zero sub norm) half @ret_only_inf(
; CHECK-SAME: half [[X:%.*]], half [[Y:%.*]]) {
; CHECK-NEXT:    [[ADD:%.*]] = fadd nnan half [[X]], [[Y]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %add = fadd half %x, %y
  ret half %add
}

define nofpclass(nan ninf zero sub norm) half @ret_only_pinf(half %x, half %y) {
; CHECK-LABEL: define nofpclass(nan ninf zero sub norm) half @ret_only_pinf(
; CHECK-SAME: half [[X:%.*]], half [[Y:%.*]]) {
; CHECK-NEXT:    ret half +inf
;
  %add = fadd half %x, %y
  ret half %add
}

define nofpclass(nan pinf zero sub norm) half @ret_only_ninf(half %x, half %y) {
; CHECK-LABEL: define nofpclass(nan pinf zero sub norm) half @ret_only_ninf(
; CHECK-SAME: half [[X:%.*]], half [[Y:%.*]]) {
; CHECK-NEXT:    ret half -inf
;
  %add = fadd half %x, %y
  ret half %add
}

define nofpclass(pinf) half @ret_nofpclass_pinf__fadd_select_unknown_or_pinf__unknown(i1 %cond, half %x, half %y) {
; CHECK-LABEL: define nofpclass(pinf) half @ret_nofpclass_pinf__fadd_select_unknown_or_pinf__unknown(
; CHECK-SAME: i1 [[COND:%.*]], half [[X:%.*]], half [[Y:%.*]]) {
; CHECK-NEXT:    [[X_OR_PINF:%.*]] = select i1 [[COND]], half [[X]], half +inf
; CHECK-NEXT:    [[ADD:%.*]] = fadd half [[X_OR_PINF]], [[Y]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %x.or.pinf = select i1 %cond, half %x, half 0xH7C00
  %add = fadd half %x.or.pinf, %y
  ret half %add
}

define nofpclass(pinf) half @ret_nofpclass_pinf__fadd_unknown__select_unknown_or_pinf(i1 %cond, half %x, half %y) {
; CHECK-LABEL: define nofpclass(pinf) half @ret_nofpclass_pinf__fadd_unknown__select_unknown_or_pinf(
; CHECK-SAME: i1 [[COND:%.*]], half [[X:%.*]], half [[Y:%.*]]) {
; CHECK-NEXT:    [[Y_OR_PINF:%.*]] = select i1 [[COND]], half [[Y]], half +inf
; CHECK-NEXT:    [[ADD:%.*]] = fadd half [[X]], [[Y_OR_PINF]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %y.or.pinf = select i1 %cond, half %y, half 0xH7C00
  %add = fadd half %x, %y.or.pinf
  ret half %add
}

define nofpclass(inf) half @ret_nofpclass_inf__fadd_select_unknown_or_inf__unknown(i1 %cond, half %x, half %y) {
; CHECK-LABEL: define nofpclass(inf) half @ret_nofpclass_inf__fadd_select_unknown_or_inf__unknown(
; CHECK-SAME: i1 [[COND:%.*]], half [[X:%.*]], half [[Y:%.*]]) {
; CHECK-NEXT:    [[INF:%.*]] = call half @returns_inf()
; CHECK-NEXT:    [[X_OR_INF:%.*]] = select i1 [[COND]], half [[X]], half [[INF]]
; CHECK-NEXT:    [[ADD:%.*]] = fadd half [[X_OR_INF]], [[Y]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %inf = call half @returns_inf()
  %x.or.inf = select i1 %cond, half %x, half %inf
  %add = fadd half %x.or.inf, %y
  ret half %add
}

define nofpclass(inf) half @ret_nofpclass_inf__fadd_unknown__select_unknown_or_inf(i1 %cond, half %x, half %y) {
; CHECK-LABEL: define nofpclass(inf) half @ret_nofpclass_inf__fadd_unknown__select_unknown_or_inf(
; CHECK-SAME: i1 [[COND:%.*]], half [[X:%.*]], half [[Y:%.*]]) {
; CHECK-NEXT:    [[INF:%.*]] = call half @returns_inf()
; CHECK-NEXT:    [[Y_OR_INF:%.*]] = select i1 [[COND]], half [[Y]], half [[INF]]
; CHECK-NEXT:    [[ADD:%.*]] = fadd half [[X]], [[Y_OR_INF]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %inf = call half @returns_inf()
  %y.or.inf = select i1 %cond, half %y, half %inf
  %add = fadd half %x, %y.or.inf
  ret half %add
}

define nofpclass(pinf) half @ret_nofpclass_pinf__fadd_select_unknown_or_pinf(i1 %cond, half %x, half %y) {
; CHECK-LABEL: define nofpclass(pinf) half @ret_nofpclass_pinf__fadd_select_unknown_or_pinf(
; CHECK-SAME: i1 [[COND:%.*]], half [[X:%.*]], half [[Y:%.*]]) {
; CHECK-NEXT:    [[TMP1:%.*]] = fadd half [[X]], [[Y]]
; CHECK-NEXT:    ret half [[TMP1]]
;
  %x.or.pinf = select i1 %cond, half %x, half 0xH7C00
  %y.or.pinf = select i1 %cond, half %y, half 0xH7C00
  %add = fadd half %x.or.pinf, %y.or.pinf
  ret half %add
}

define nofpclass(ninf) half @ret_nofpclass_ninf__fadd_select_unknown_or_ninf(i1 %cond, half %x, half %y) {
; CHECK-LABEL: define nofpclass(ninf) half @ret_nofpclass_ninf__fadd_select_unknown_or_ninf(
; CHECK-SAME: i1 [[COND:%.*]], half [[X:%.*]], half [[Y:%.*]]) {
; CHECK-NEXT:    [[TMP1:%.*]] = fadd half [[X]], [[Y]]
; CHECK-NEXT:    ret half [[TMP1]]
;
  %x.or.ninf = select i1 %cond, half %x, half 0xHFC00
  %y.or.ninf = select i1 %cond, half %y, half 0xHFC00
  %add = fadd half %x.or.ninf, %y.or.ninf
  ret half %add
}

define nofpclass(inf) half @ret_nofpclass_inf__fadd_select_unknown_or_inf(i1 %cond, half %x, half %y) {
; CHECK-LABEL: define nofpclass(inf) half @ret_nofpclass_inf__fadd_select_unknown_or_inf(
; CHECK-SAME: i1 [[COND:%.*]], half [[X:%.*]], half [[Y:%.*]]) {
; CHECK-NEXT:    [[INF0:%.*]] = call half @returns_inf()
; CHECK-NEXT:    [[INF1:%.*]] = call half @returns_inf()
; CHECK-NEXT:    [[X_OR_INF:%.*]] = select i1 [[COND]], half [[X]], half [[INF0]]
; CHECK-NEXT:    [[Y_OR_INF:%.*]] = select i1 [[COND]], half [[Y]], half [[INF1]]
; CHECK-NEXT:    [[ADD:%.*]] = fadd half [[X_OR_INF]], [[Y_OR_INF]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %inf0 = call half @returns_inf()
  %inf1 = call half @returns_inf()
  %x.or.inf = select i1 %cond, half %x, half %inf0
  %y.or.inf = select i1 %cond, half %y, half %inf1
  %add = fadd half %x.or.inf, %y.or.inf
  ret half %add
}

define nofpclass(nan inf) half @ret_nofpclass_inf_nan__fadd_select_unknown_or_inf(i1 %cond, half %x, half %y) {
; CHECK-LABEL: define nofpclass(nan inf) half @ret_nofpclass_inf_nan__fadd_select_unknown_or_inf(
; CHECK-SAME: i1 [[COND:%.*]], half [[X:%.*]], half [[Y:%.*]]) {
; CHECK-NEXT:    [[INF0:%.*]] = call half @returns_inf()
; CHECK-NEXT:    [[INF1:%.*]] = call half @returns_inf()
; CHECK-NEXT:    [[ADD:%.*]] = fadd nnan ninf half [[X]], [[Y]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %inf0 = call half @returns_inf()
  %inf1 = call half @returns_inf()
  %x.or.inf = select i1 %cond, half %x, half %inf0
  %y.or.inf = select i1 %cond, half %y, half %inf1
  %add = fadd half %x.or.inf, %y.or.inf
  ret half %add
}

; Cannot prune the select, the result could be nan depending on %x
define nofpclass(inf sub norm) half @nan_result_demands_inf_input_lhs(i1 %cond, half nofpclass(zero) %x, half nofpclass(zero inf nan) %y) {
; CHECK-LABEL: define nofpclass(inf sub norm) half @nan_result_demands_inf_input_lhs(
; CHECK-SAME: i1 [[COND:%.*]], half nofpclass(zero) [[X:%.*]], half nofpclass(nan inf zero) [[Y:%.*]]) {
; CHECK-NEXT:    [[PINF:%.*]] = call half @returns_pinf()
; CHECK-NEXT:    [[X_OR_INF:%.*]] = select i1 [[COND]], half [[X]], half +inf
; CHECK-NEXT:    [[ADD:%.*]] = fadd half [[X_OR_INF]], [[Y]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %pinf = call half @returns_pinf()
  %x.or.inf = select i1 %cond, half %x, half %pinf
  %add = fadd half %x.or.inf, %y
  ret half %add
}

; Cannot prune the select, the result could be nan depending on %y
define nofpclass(inf sub norm) half @nan_result_demands_inf_input_rhs(i1 %cond, half nofpclass(zero) %x, half %y) {
; CHECK-LABEL: define nofpclass(inf sub norm) half @nan_result_demands_inf_input_rhs(
; CHECK-SAME: i1 [[COND:%.*]], half nofpclass(zero) [[X:%.*]], half [[Y:%.*]]) {
; CHECK-NEXT:    [[PINF:%.*]] = call half @returns_pinf()
; CHECK-NEXT:    [[Y_OR_INF:%.*]] = select i1 [[COND]], half [[Y]], half +inf
; CHECK-NEXT:    [[ADD:%.*]] = fadd half [[X]], [[Y_OR_INF]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %pinf = call half @returns_pinf()
  %y.or.inf = select i1 %cond, half %y, half %pinf
  %add = fadd half %x, %y.or.inf
  ret half %add
}

; Cannot prune the select
define nofpclass(nan sub norm zero) half @inf_result_demands_inf_input_lhs(i1 %cond, half nofpclass(zero) %x, half nofpclass(zero) %y) {
; CHECK-LABEL: define nofpclass(nan zero sub norm) half @inf_result_demands_inf_input_lhs(
; CHECK-SAME: i1 [[COND:%.*]], half nofpclass(zero) [[X:%.*]], half nofpclass(zero) [[Y:%.*]]) {
; CHECK-NEXT:    [[INF:%.*]] = call half @returns_inf()
; CHECK-NEXT:    [[X_OR_INF:%.*]] = select i1 [[COND]], half [[X]], half [[INF]]
; CHECK-NEXT:    [[ADD:%.*]] = fadd nnan half [[X_OR_INF]], [[Y]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %inf = call half @returns_inf()
  %x.or.inf = select i1 %cond, half %x, half %inf
  %add = fadd half %x.or.inf, %y
  ret half %add
}

; Cannot prune the select
define nofpclass(nan sub norm zero) half @inf_result_demands_inf_input_rhs(i1 %cond, half nofpclass(zero) %x, half nofpclass(zero) %y) {
; CHECK-LABEL: define nofpclass(nan zero sub norm) half @inf_result_demands_inf_input_rhs(
; CHECK-SAME: i1 [[COND:%.*]], half nofpclass(zero) [[X:%.*]], half nofpclass(zero) [[Y:%.*]]) {
; CHECK-NEXT:    [[INF:%.*]] = call half @returns_inf()
; CHECK-NEXT:    [[Y_OR_INF:%.*]] = select i1 [[COND]], half [[Y]], half [[INF]]
; CHECK-NEXT:    [[ADD:%.*]] = fadd nnan half [[X]], [[Y_OR_INF]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %inf = call half @returns_inf()
  %y.or.inf = select i1 %cond, half %y, half %inf
  %add = fadd half %x, %y.or.inf
  ret half %add
}

; Cannot prune the select
define nofpclass(nan sub norm zero) half @inf_result_demands_pinf_input_lhs(i1 %cond, half nofpclass(zero) %x, half nofpclass(zero) %y) {
; CHECK-LABEL: define nofpclass(nan zero sub norm) half @inf_result_demands_pinf_input_lhs(
; CHECK-SAME: i1 [[COND:%.*]], half nofpclass(zero) [[X:%.*]], half nofpclass(zero) [[Y:%.*]]) {
; CHECK-NEXT:    [[PINF:%.*]] = call half @returns_pinf()
; CHECK-NEXT:    [[X_OR_INF:%.*]] = select i1 [[COND]], half [[X]], half +inf
; CHECK-NEXT:    [[ADD:%.*]] = fadd nnan half [[X_OR_INF]], [[Y]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %pinf = call half @returns_pinf()
  %x.or.inf = select i1 %cond, half %x, half %pinf
  %add = fadd half %x.or.inf, %y
  ret half %add
}

; Cannot prune the select
define nofpclass(nan sub norm zero) half @inf_result_demands_pinf_input_rhs(i1 %cond, half nofpclass(zero) %x, half nofpclass(zero) %y) {
; CHECK-LABEL: define nofpclass(nan zero sub norm) half @inf_result_demands_pinf_input_rhs(
; CHECK-SAME: i1 [[COND:%.*]], half nofpclass(zero) [[X:%.*]], half nofpclass(zero) [[Y:%.*]]) {
; CHECK-NEXT:    [[PINF:%.*]] = call half @returns_pinf()
; CHECK-NEXT:    [[Y_OR_INF:%.*]] = select i1 [[COND]], half [[Y]], half +inf
; CHECK-NEXT:    [[ADD:%.*]] = fadd nnan half [[X]], [[Y_OR_INF]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %pinf = call half @returns_pinf()
  %y.or.inf = select i1 %cond, half %y, half %pinf
  %add = fadd half %x, %y.or.inf
  ret half %add
}

; Cannot prune the select
define nofpclass(nan sub norm zero) half @inf_result_demands_ninf_input_lhs(i1 %cond, half nofpclass(zero) %x, half nofpclass(zero) %y) {
; CHECK-LABEL: define nofpclass(nan zero sub norm) half @inf_result_demands_ninf_input_lhs(
; CHECK-SAME: i1 [[COND:%.*]], half nofpclass(zero) [[X:%.*]], half nofpclass(zero) [[Y:%.*]]) {
; CHECK-NEXT:    [[NINF:%.*]] = call half @returns_ninf()
; CHECK-NEXT:    [[X_OR_INF:%.*]] = select i1 [[COND]], half [[X]], half -inf
; CHECK-NEXT:    [[ADD:%.*]] = fadd nnan half [[X_OR_INF]], [[Y]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %ninf = call half @returns_ninf()
  %x.or.inf = select i1 %cond, half %x, half %ninf
  %add = fadd half %x.or.inf, %y
  ret half %add
}

; Cannot prune the select
define nofpclass(nan sub norm zero) half @inf_result_demands_ninf_input_rhs(i1 %cond, half nofpclass(zero) %x, half nofpclass(zero) %y) {
; CHECK-LABEL: define nofpclass(nan zero sub norm) half @inf_result_demands_ninf_input_rhs(
; CHECK-SAME: i1 [[COND:%.*]], half nofpclass(zero) [[X:%.*]], half nofpclass(zero) [[Y:%.*]]) {
; CHECK-NEXT:    [[NINF:%.*]] = call half @returns_ninf()
; CHECK-NEXT:    [[Y_OR_INF:%.*]] = select i1 [[COND]], half [[Y]], half -inf
; CHECK-NEXT:    [[ADD:%.*]] = fadd nnan half [[X]], [[Y_OR_INF]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %ninf = call half @returns_ninf()
  %y.or.inf = select i1 %cond, half %y, half %ninf
  %add = fadd half %x, %y.or.inf
  ret half %add
}

; Cannot add nnan flag from not-nan inputs, the result could still be
; nan
define nofpclass(snan) half @no_nans_inputs(half nofpclass(nan) %x, half nofpclass(nan) %y) {
; CHECK-LABEL: define nofpclass(snan) half @no_nans_inputs(
; CHECK-SAME: half nofpclass(nan) [[X:%.*]], half nofpclass(nan) [[Y:%.*]]) {
; CHECK-NEXT:    [[ADD:%.*]] = fadd half [[X]], [[Y]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %add = fadd half %x, %y
  ret half %add
}

; Can add nnan flag if inputs and output known not-nan.
define nofpclass(nan) half @no_nans_input_and_output(half nofpclass(nan) %x, half nofpclass(nan) %y) {
; CHECK-LABEL: define nofpclass(nan) half @no_nans_input_and_output(
; CHECK-SAME: half nofpclass(nan) [[X:%.*]], half nofpclass(nan) [[Y:%.*]]) {
; CHECK-NEXT:    [[ADD:%.*]] = fadd nnan half [[X]], [[Y]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %add = fadd half %x, %y
  ret half %add
}

; Cannot add ninf flag from not-inf inputs, the result could still be
; inf
define nofpclass(snan) half @no_infs_inputs(half nofpclass(inf) %x, half nofpclass(inf) %y) {
; CHECK-LABEL: define nofpclass(snan) half @no_infs_inputs(
; CHECK-SAME: half nofpclass(inf) [[X:%.*]], half nofpclass(inf) [[Y:%.*]]) {
; CHECK-NEXT:    [[ADD:%.*]] = fadd half [[X]], [[Y]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %add = fadd half %x, %y
  ret half %add
}

; Can infer ninf flag
define nofpclass(inf) half @no_infs_inputs_and_outputs(half nofpclass(inf) %x, half nofpclass(inf) %y) {
; CHECK-LABEL: define nofpclass(inf) half @no_infs_inputs_and_outputs(
; CHECK-SAME: half nofpclass(inf) [[X:%.*]], half nofpclass(inf) [[Y:%.*]]) {
; CHECK-NEXT:    [[ADD:%.*]] = fadd ninf half [[X]], [[Y]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %add = fadd half %x, %y
  ret half %add
}

; Can infer nnan flag, not ninf flag.
define nofpclass(snan) half @no_nans_infs_inputs(half nofpclass(nan inf) %x, half nofpclass(nan inf) %y) {
; CHECK-LABEL: define nofpclass(snan) half @no_nans_infs_inputs(
; CHECK-SAME: half nofpclass(nan inf) [[X:%.*]], half nofpclass(nan inf) [[Y:%.*]]) {
; CHECK-NEXT:    [[ADD:%.*]] = fadd nnan half [[X]], [[Y]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %add = fadd half %x, %y
  ret half %add
}

; Can infer nnan, ninf
define nofpclass(inf) half @no_nans_infs_inputs__noinfs_output(half nofpclass(nan inf) %x, half nofpclass(nan inf) %y) {
; CHECK-LABEL: define nofpclass(inf) half @no_nans_infs_inputs__noinfs_output(
; CHECK-SAME: half nofpclass(nan inf) [[X:%.*]], half nofpclass(nan inf) [[Y:%.*]]) {
; CHECK-NEXT:    [[ADD:%.*]] = fadd nnan ninf half [[X]], [[Y]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %add = fadd half %x, %y
  ret half %add
}

; Can only infer nnan, not ninf
define nofpclass(nan) half @no_nans_infs_inputs__nonans_output(half nofpclass(nan inf) %x, half nofpclass(nan inf) %y) {
; CHECK-LABEL: define nofpclass(nan) half @no_nans_infs_inputs__nonans_output(
; CHECK-SAME: half nofpclass(nan inf) [[X:%.*]], half nofpclass(nan inf) [[Y:%.*]]) {
; CHECK-NEXT:    [[ADD:%.*]] = fadd nnan half [[X]], [[Y]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %add = fadd half %x, %y
  ret half %add
}

; Can infer nnan flag
define nofpclass(nzero) half @inferred_nan_output__noinfs_only_lhs(half nofpclass(nan inf) %x, half nofpclass(nan) %y) {
; CHECK-LABEL: define nofpclass(nzero) half @inferred_nan_output__noinfs_only_lhs(
; CHECK-SAME: half nofpclass(nan inf) [[X:%.*]], half nofpclass(nan) [[Y:%.*]]) {
; CHECK-NEXT:    [[ADD:%.*]] = fadd nnan half [[X]], [[Y]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %add = fadd half %x, %y
  ret half %add
}

; Can infer nnan flag
define nofpclass(nzero) half @inferred_nan_output__noinfs_only_rhs(half nofpclass(nan) %x, half nofpclass(nan inf) %y) {
; CHECK-LABEL: define nofpclass(nzero) half @inferred_nan_output__noinfs_only_rhs(
; CHECK-SAME: half nofpclass(nan) [[X:%.*]], half nofpclass(nan inf) [[Y:%.*]]) {
; CHECK-NEXT:    [[ADD:%.*]] = fadd nnan half [[X]], [[Y]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %add = fadd half %x, %y
  ret half %add
}

define nofpclass(nzero) half @inferred_nan_output__fadd__nnan__no_ninf_no_nan(half nofpclass(nan) %x, half nofpclass(nan ninf) %y) {
; CHECK-LABEL: define nofpclass(nzero) half @inferred_nan_output__fadd__nnan__no_ninf_no_nan(
; CHECK-SAME: half nofpclass(nan) [[X:%.*]], half nofpclass(nan ninf) [[Y:%.*]]) {
; CHECK-NEXT:    [[ADD:%.*]] = fadd half [[X]], [[Y]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %add = fadd half %x, %y
  ret half %add
}

define nofpclass(nzero) half @inferred_nan_output__fadd__no_ninf_no_nan__no_nan(half nofpclass(nan ninf) %x, half nofpclass(nan) %y) {
; CHECK-LABEL: define nofpclass(nzero) half @inferred_nan_output__fadd__no_ninf_no_nan__no_nan(
; CHECK-SAME: half nofpclass(nan ninf) [[X:%.*]], half nofpclass(nan) [[Y:%.*]]) {
; CHECK-NEXT:    [[ADD:%.*]] = fadd half [[X]], [[Y]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %add = fadd half %x, %y
  ret half %add
}

define nofpclass(nzero) half @inferred_nan_output__fadd__no_nan__no_pinf_no_nan(half nofpclass(nan) %x, half nofpclass(nan pinf) %y) {
; CHECK-LABEL: define nofpclass(nzero) half @inferred_nan_output__fadd__no_nan__no_pinf_no_nan(
; CHECK-SAME: half nofpclass(nan) [[X:%.*]], half nofpclass(nan pinf) [[Y:%.*]]) {
; CHECK-NEXT:    [[ADD:%.*]] = fadd half [[X]], [[Y]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %add = fadd half %x, %y
  ret half %add
}

define nofpclass(nzero) half @inferred_nan_output__fadd__no_pinf_no_nan__no_nan(half nofpclass(nan pinf) %x, half nofpclass(nan) %y) {
; CHECK-LABEL: define nofpclass(nzero) half @inferred_nan_output__fadd__no_pinf_no_nan__no_nan(
; CHECK-SAME: half nofpclass(nan pinf) [[X:%.*]], half nofpclass(nan) [[Y:%.*]]) {
; CHECK-NEXT:    [[ADD:%.*]] = fadd half [[X]], [[Y]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %add = fadd half %x, %y
  ret half %add
}

define nofpclass(nzero) half @inferred_nan_output__fadd__no_pinf_no_nan__no_pinf_no_nan(half nofpclass(nan pinf) %x, half nofpclass(nan pinf) %y) {
; CHECK-LABEL: define nofpclass(nzero) half @inferred_nan_output__fadd__no_pinf_no_nan__no_pinf_no_nan(
; CHECK-SAME: half nofpclass(nan pinf) [[X:%.*]], half nofpclass(nan pinf) [[Y:%.*]]) {
; CHECK-NEXT:    [[ADD:%.*]] = fadd nnan half [[X]], [[Y]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %add = fadd half %x, %y
  ret half %add
}

define nofpclass(nzero) half @inferred_nan_output__fadd__no_ninf_no_nan__no_ninf_no_nan(half nofpclass(nan ninf) %x, half nofpclass(nan ninf) %y) {
; CHECK-LABEL: define nofpclass(nzero) half @inferred_nan_output__fadd__no_ninf_no_nan__no_ninf_no_nan(
; CHECK-SAME: half nofpclass(nan ninf) [[X:%.*]], half nofpclass(nan ninf) [[Y:%.*]]) {
; CHECK-NEXT:    [[ADD:%.*]] = fadd nnan half [[X]], [[Y]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %add = fadd half %x, %y
  ret half %add
}

; Should be able to eliminate the fabs
define nofpclass(nan) half @ret_nonan_fabs_fadd_known_positive_or_nan_sources() {
; CHECK-LABEL: define nofpclass(nan) half @ret_nonan_fabs_fadd_known_positive_or_nan_sources() {
; CHECK-NEXT:    [[POSITIVE_OR_NAN0:%.*]] = call half @returns_positive_or_nan()
; CHECK-NEXT:    [[POSITIVE_OR_NAN1:%.*]] = call half @returns_positive_or_nan()
; CHECK-NEXT:    [[KNOWN_POSITIVE_ADD:%.*]] = fadd nnan half [[POSITIVE_OR_NAN0]], [[POSITIVE_OR_NAN1]]
; CHECK-NEXT:    ret half [[KNOWN_POSITIVE_ADD]]
;
  %positive.or.nan0 = call half @returns_positive_or_nan()
  %positive.or.nan1 = call half @returns_positive_or_nan()
  %known.positive.add = fadd half %positive.or.nan0, %positive.or.nan1
  %fabs = call half @llvm.fabs.f16(half %known.positive.add)
  ret half %fabs
}

; Should be able to eliminate the fabs
define nofpclass(nan) half @ret_nonan_fabs_fadd_known_positive_sources() {
; CHECK-LABEL: define nofpclass(nan) half @ret_nonan_fabs_fadd_known_positive_sources() {
; CHECK-NEXT:    [[POSITIVE0:%.*]] = call half @returns_positive()
; CHECK-NEXT:    [[POSITIVE1:%.*]] = call half @returns_positive()
; CHECK-NEXT:    [[KNOWN_POSITIVE_ADD:%.*]] = fadd nnan half [[POSITIVE1]], [[POSITIVE1]]
; CHECK-NEXT:    ret half [[KNOWN_POSITIVE_ADD]]
;
  %positive0 = call half @returns_positive()
  %positive1 = call half @returns_positive()
  %known.positive.add = fadd half %positive1, %positive1
  %fabs = call half @llvm.fabs.f16(half %known.positive.add)
  ret half %fabs
}

define nofpclass(snan) half @unknown__fadd__inf(half %unknown) {
; CHECK-LABEL: define nofpclass(snan) half @unknown__fadd__inf(
; CHECK-SAME: half [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[INF:%.*]] = call half @returns_inf()
; CHECK-NEXT:    [[ADD:%.*]] = fadd half [[UNKNOWN]], [[INF]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %inf = call half @returns_inf()
  %add = fadd half %unknown, %inf
  ret half %add
}

define nofpclass(snan) half @inf__fadd__unknown(half %unknown) {
; CHECK-LABEL: define nofpclass(snan) half @inf__fadd__unknown(
; CHECK-SAME: half [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[INF:%.*]] = call half @returns_inf()
; CHECK-NEXT:    [[ADD:%.*]] = fadd half [[INF]], [[UNKNOWN]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %inf = call half @returns_inf()
  %add = fadd half %inf, %unknown
  ret half %add
}

define nofpclass(snan) half @unknown__fadd__inf_or_nan(half %unknown) {
; CHECK-LABEL: define nofpclass(snan) half @unknown__fadd__inf_or_nan(
; CHECK-SAME: half [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[INF_OR_NAN:%.*]] = call half @returns_inf_or_nan()
; CHECK-NEXT:    [[ADD:%.*]] = fadd half [[UNKNOWN]], [[INF_OR_NAN]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %inf.or.nan = call half @returns_inf_or_nan()
  %add = fadd half %unknown, %inf.or.nan
  ret half %add
}

define nofpclass(snan) half @inf_or_nan__fadd__unknown(half %unknown) {
; CHECK-LABEL: define nofpclass(snan) half @inf_or_nan__fadd__unknown(
; CHECK-SAME: half [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[INF_OR_NAN:%.*]] = call half @returns_inf_or_nan()
; CHECK-NEXT:    [[ADD:%.*]] = fadd half [[INF_OR_NAN]], [[UNKNOWN]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %inf.or.nan = call half @returns_inf_or_nan()
  %add = fadd half %inf.or.nan, %unknown
  ret half %add
}

define nofpclass(nan) half @ret_nonan__unknown__fadd__inf(half %unknown) {
; CHECK-LABEL: define nofpclass(nan) half @ret_nonan__unknown__fadd__inf(
; CHECK-SAME: half [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[INF:%.*]] = call half @returns_inf()
; CHECK-NEXT:    ret half [[INF]]
;
  %inf = call half @returns_inf()
  %add = fadd half %unknown, %inf
  ret half %add
}

define nofpclass(nan) half @ret_nonan__inf__fadd__unknown(half %unknown) {
; CHECK-LABEL: define nofpclass(nan) half @ret_nonan__inf__fadd__unknown(
; CHECK-SAME: half [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[INF:%.*]] = call half @returns_inf()
; CHECK-NEXT:    ret half [[INF]]
;
  %inf = call half @returns_inf()
  %add = fadd half %inf, %unknown
  ret half %add
}

define nofpclass(nan) half @ret_nonan__unknown__fadd__inf_or_nan(half %unknown) {
; CHECK-LABEL: define nofpclass(nan) half @ret_nonan__unknown__fadd__inf_or_nan(
; CHECK-SAME: half [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[INF_OR_NAN:%.*]] = call half @returns_inf_or_nan()
; CHECK-NEXT:    ret half [[INF_OR_NAN]]
;
  %inf.or.nan = call half @returns_inf_or_nan()
  %add = fadd half %unknown, %inf.or.nan
  ret half %add
}

define nofpclass(nan) half @ret_nonan__inf_or_nan__fadd__unknown(half %unknown) {
; CHECK-LABEL: define nofpclass(nan) half @ret_nonan__inf_or_nan__fadd__unknown(
; CHECK-SAME: half [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[INF_OR_NAN:%.*]] = call half @returns_inf_or_nan()
; CHECK-NEXT:    ret half [[INF_OR_NAN]]
;
  %inf.or.nan = call half @returns_inf_or_nan()
  %add = fadd half %inf.or.nan, %unknown
  ret half %add
}

define nofpclass(snan) half @unknown__fadd__zero(half %unknown) {
; CHECK-LABEL: define nofpclass(snan) half @unknown__fadd__zero(
; CHECK-SAME: half [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[ZERO:%.*]] = call half @returns_zero()
; CHECK-NEXT:    [[ADD:%.*]] = fadd half [[UNKNOWN]], [[ZERO]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %zero = call half @returns_zero()
  %add = fadd half %unknown, %zero
  ret half %add
}

define nofpclass(snan) half @zero__fadd__unknown(half %unknown) {
; CHECK-LABEL: define nofpclass(snan) half @zero__fadd__unknown(
; CHECK-SAME: half [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[ZERO:%.*]] = call half @returns_zero()
; CHECK-NEXT:    [[ADD:%.*]] = fadd half [[ZERO]], [[UNKNOWN]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %zero = call half @returns_zero()
  %add = fadd half %zero, %unknown
  ret half %add
}

define nofpclass(nan) half @ret_nonan__unknown__fadd__zero(half %unknown) {
; CHECK-LABEL: define nofpclass(nan) half @ret_nonan__unknown__fadd__zero(
; CHECK-SAME: half [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[ZERO:%.*]] = call half @returns_zero()
; CHECK-NEXT:    [[ADD:%.*]] = fadd nnan half [[UNKNOWN]], [[ZERO]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %zero = call half @returns_zero()
  %add = fadd half %unknown, %zero
  ret half %add
}

define nofpclass(nan) half @ret_nonan__zero__fadd__unknown(half %unknown) {
; CHECK-LABEL: define nofpclass(nan) half @ret_nonan__zero__fadd__unknown(
; CHECK-SAME: half [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[ZERO:%.*]] = call half @returns_zero()
; CHECK-NEXT:    [[ADD:%.*]] = fadd nnan half [[ZERO]], [[UNKNOWN]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %zero = call half @returns_zero()
  %add = fadd half %zero, %unknown
  ret half %add
}

define nofpclass(snan) half @unknown__fadd__pzero(half %unknown) {
; CHECK-LABEL: define nofpclass(snan) half @unknown__fadd__pzero(
; CHECK-SAME: half [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[PZERO:%.*]] = call half @returns_pzero()
; CHECK-NEXT:    [[ADD:%.*]] = fadd half [[UNKNOWN]], 0.000000e+00
; CHECK-NEXT:    ret half [[ADD]]
;
  %pzero = call half @returns_pzero()
  %add = fadd half %unknown, %pzero
  ret half %add
}

define nofpclass(snan) half @pzero__fadd__unknown(half %unknown) {
; CHECK-LABEL: define nofpclass(snan) half @pzero__fadd__unknown(
; CHECK-SAME: half [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[PZERO:%.*]] = call half @returns_pzero()
; CHECK-NEXT:    [[ADD:%.*]] = fadd half [[UNKNOWN]], 0.000000e+00
; CHECK-NEXT:    ret half [[ADD]]
;
  %pzero = call half @returns_pzero()
  %add = fadd half %pzero, %unknown
  ret half %add
}

define nofpclass(nan) half @ret_nonan__unknown__fadd__pzero(half %unknown) {
; CHECK-LABEL: define nofpclass(nan) half @ret_nonan__unknown__fadd__pzero(
; CHECK-SAME: half [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[PZERO:%.*]] = call half @returns_pzero()
; CHECK-NEXT:    [[ADD:%.*]] = fadd nnan half [[UNKNOWN]], 0.000000e+00
; CHECK-NEXT:    ret half [[ADD]]
;
  %pzero = call half @returns_pzero()
  %add = fadd half %unknown, %pzero
  ret half %add
}

define nofpclass(nan) half @ret_nonan__pzero__fadd__unknown(half %unknown) {
; CHECK-LABEL: define nofpclass(nan) half @ret_nonan__pzero__fadd__unknown(
; CHECK-SAME: half [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[PZERO:%.*]] = call half @returns_pzero()
; CHECK-NEXT:    [[ADD:%.*]] = fadd nnan half [[UNKNOWN]], 0.000000e+00
; CHECK-NEXT:    ret half [[ADD]]
;
  %pzero = call half @returns_pzero()
  %add = fadd half %pzero, %unknown
  ret half %add
}

define nofpclass(snan) half @unknown__fadd__nzero(half %unknown) {
; CHECK-LABEL: define nofpclass(snan) half @unknown__fadd__nzero(
; CHECK-SAME: half [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[NZERO:%.*]] = call half @returns_nzero()
; CHECK-NEXT:    ret half [[UNKNOWN]]
;
  %nzero = call half @returns_nzero()
  %add = fadd half %unknown, %nzero
  ret half %add
}

define nofpclass(snan) half @nzero__fadd__unknown(half %unknown) {
; CHECK-LABEL: define nofpclass(snan) half @nzero__fadd__unknown(
; CHECK-SAME: half [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[NZERO:%.*]] = call half @returns_nzero()
; CHECK-NEXT:    ret half [[UNKNOWN]]
;
  %nzero = call half @returns_nzero()
  %add = fadd half %nzero, %unknown
  ret half %add
}

define nofpclass(snan) half @unknown__fadd__nzero_or_nan(half %unknown) {
; CHECK-LABEL: define nofpclass(snan) half @unknown__fadd__nzero_or_nan(
; CHECK-SAME: half [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[NZERO_OR_NAN:%.*]] = call half @returns_nzero_or_nan()
; CHECK-NEXT:    [[ADD:%.*]] = fadd half [[UNKNOWN]], [[NZERO_OR_NAN]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %nzero.or.nan = call half @returns_nzero_or_nan()
  %add = fadd half %unknown, %nzero.or.nan
  ret half %add
}

define nofpclass(snan) half @nzero_or_nan__fadd__unknown(half %unknown) {
; CHECK-LABEL: define nofpclass(snan) half @nzero_or_nan__fadd__unknown(
; CHECK-SAME: half [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[NZERO_OR_NAN:%.*]] = call half @returns_nzero_or_nan()
; CHECK-NEXT:    [[ADD:%.*]] = fadd half [[NZERO_OR_NAN]], [[UNKNOWN]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %nzero.or.nan = call half @returns_nzero_or_nan()
  %add = fadd half %nzero.or.nan, %unknown
  ret half %add
}

define nofpclass(nan) half @ret_nonan__unknown__fadd__nzero(half %unknown) {
; CHECK-LABEL: define nofpclass(nan) half @ret_nonan__unknown__fadd__nzero(
; CHECK-SAME: half [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[NZERO:%.*]] = call half @returns_nzero()
; CHECK-NEXT:    ret half [[UNKNOWN]]
;
  %nzero = call half @returns_nzero()
  %add = fadd half %unknown, %nzero
  ret half %add
}

define nofpclass(nan) half @ret_nonan__nzero__fadd__unknown(half %unknown) {
; CHECK-LABEL: define nofpclass(nan) half @ret_nonan__nzero__fadd__unknown(
; CHECK-SAME: half [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[NZERO:%.*]] = call half @returns_nzero()
; CHECK-NEXT:    ret half [[UNKNOWN]]
;
  %nzero = call half @returns_nzero()
  %add = fadd half %nzero, %unknown
  ret half %add
}

define nofpclass(snan) half @not_nzero__fadd__zero(half nofpclass(nzero) %not.nzero) {
; CHECK-LABEL: define nofpclass(snan) half @not_nzero__fadd__zero(
; CHECK-SAME: half nofpclass(nzero) [[NOT_NZERO:%.*]]) {
; CHECK-NEXT:    [[ZERO:%.*]] = call half @returns_zero()
; CHECK-NEXT:    [[ADD:%.*]] = fadd half [[NOT_NZERO]], [[ZERO]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %zero = call half @returns_zero()
  %add = fadd half %not.nzero, %zero
  ret half %add
}

define nofpclass(snan) half @zero__fadd__not_nzero(half nofpclass(nzero) %not.nzero) {
; CHECK-LABEL: define nofpclass(snan) half @zero__fadd__not_nzero(
; CHECK-SAME: half nofpclass(nzero) [[NOT_NZERO:%.*]]) {
; CHECK-NEXT:    [[ZERO:%.*]] = call half @returns_zero()
; CHECK-NEXT:    [[ADD:%.*]] = fadd half [[ZERO]], [[NOT_NZERO]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %zero = call half @returns_zero()
  %add = fadd half %zero, %not.nzero
  ret half %add
}

define nofpclass(snan) half @not_nzero__fadd__pzero(half nofpclass(nzero) %not.nzero) {
; CHECK-LABEL: define nofpclass(snan) half @not_nzero__fadd__pzero(
; CHECK-SAME: half nofpclass(nzero) [[NOT_NZERO:%.*]]) {
; CHECK-NEXT:    [[PZERO:%.*]] = call half @returns_pzero()
; CHECK-NEXT:    ret half [[NOT_NZERO]]
;
  %pzero = call half @returns_pzero()
  %add = fadd half %not.nzero, %pzero
  ret half %add
}

define nofpclass(snan) half @pzero__fadd__not_nzero(half nofpclass(nzero) %not.nzero) {
; CHECK-LABEL: define nofpclass(snan) half @pzero__fadd__not_nzero(
; CHECK-SAME: half nofpclass(nzero) [[NOT_NZERO:%.*]]) {
; CHECK-NEXT:    [[PZERO:%.*]] = call half @returns_pzero()
; CHECK-NEXT:    ret half [[NOT_NZERO]]
;
  %pzero = call half @returns_pzero()
  %add = fadd half %pzero, %not.nzero
  ret half %add
}

define nofpclass(snan) half @not_nzero__fadd__zero_or_nan(half nofpclass(nzero) %not.nzero) {
; CHECK-LABEL: define nofpclass(snan) half @not_nzero__fadd__zero_or_nan(
; CHECK-SAME: half nofpclass(nzero) [[NOT_NZERO:%.*]]) {
; CHECK-NEXT:    [[ZERO_OR_NAN:%.*]] = call half @returns_zero_or_nan()
; CHECK-NEXT:    [[ADD:%.*]] = fadd half [[NOT_NZERO]], [[ZERO_OR_NAN]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %zero.or.nan = call half @returns_zero_or_nan()
  %add = fadd half %not.nzero, %zero.or.nan
  ret half %add
}

define nofpclass(snan) half @zero_or_nan__fadd__not_nzero(half nofpclass(nzero) %not.nzero) {
; CHECK-LABEL: define nofpclass(snan) half @zero_or_nan__fadd__not_nzero(
; CHECK-SAME: half nofpclass(nzero) [[NOT_NZERO:%.*]]) {
; CHECK-NEXT:    [[ZERO_OR_NAN:%.*]] = call half @returns_zero_or_nan()
; CHECK-NEXT:    [[ADD:%.*]] = fadd half [[ZERO_OR_NAN]], [[NOT_NZERO]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %zero.or.nan = call half @returns_zero_or_nan()
  %add = fadd half %zero.or.nan, %not.nzero
  ret half %add
}

define nofpclass(snan) half @not_nzero__fadd__pzero_or_nan(half nofpclass(nzero) %not.nzero) {
; CHECK-LABEL: define nofpclass(snan) half @not_nzero__fadd__pzero_or_nan(
; CHECK-SAME: half nofpclass(nzero) [[NOT_NZERO:%.*]]) {
; CHECK-NEXT:    [[PZERO_OR_NAN:%.*]] = call half @returns_pzero_or_nan()
; CHECK-NEXT:    [[ADD:%.*]] = fadd half [[NOT_NZERO]], [[PZERO_OR_NAN]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %pzero.or.nan = call half @returns_pzero_or_nan()
  %add = fadd half %not.nzero, %pzero.or.nan
  ret half %add
}

define nofpclass(snan) half @pzero_or_nan__fadd__not_nzero(half nofpclass(nzero) %not.nzero) {
; CHECK-LABEL: define nofpclass(snan) half @pzero_or_nan__fadd__not_nzero(
; CHECK-SAME: half nofpclass(nzero) [[NOT_NZERO:%.*]]) {
; CHECK-NEXT:    [[PZERO_OR_NAN:%.*]] = call half @returns_pzero_or_nan()
; CHECK-NEXT:    [[ADD:%.*]] = fadd half [[PZERO_OR_NAN]], [[NOT_NZERO]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %pzero.or.nan = call half @returns_pzero_or_nan()
  %add = fadd half %pzero.or.nan, %not.nzero
  ret half %add
}

define nofpclass(snan) half @unknown__fadd_nsz__pzero(half %unknown) {
; CHECK-LABEL: define nofpclass(snan) half @unknown__fadd_nsz__pzero(
; CHECK-SAME: half [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[PZERO:%.*]] = call half @returns_pzero()
; CHECK-NEXT:    ret half [[UNKNOWN]]
;
  %pzero = call half @returns_pzero()
  %add = fadd nsz half %unknown, %pzero
  ret half %add
}

define nofpclass(snan) half @pzero__fadd_nsz__unknown(half %unknown) {
; CHECK-LABEL: define nofpclass(snan) half @pzero__fadd_nsz__unknown(
; CHECK-SAME: half [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[PZERO:%.*]] = call half @returns_pzero()
; CHECK-NEXT:    ret half [[UNKNOWN]]
;
  %pzero = call half @returns_pzero()
  %add = fadd nsz half %pzero, %unknown
  ret half %add
}

define nofpclass(snan) half @unknown__fadd_nsz__pzero_or_nan(half %unknown) {
; CHECK-LABEL: define nofpclass(snan) half @unknown__fadd_nsz__pzero_or_nan(
; CHECK-SAME: half [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[PZERO_OR_NAN:%.*]] = call half @returns_pzero()
; CHECK-NEXT:    ret half [[UNKNOWN]]
;
  %pzero.or.nan = call half @returns_pzero()
  %add = fadd nsz half %unknown, %pzero.or.nan
  ret half %add
}

define nofpclass(snan) half @pzero_or_nan__fadd_nsz__unknown(half %unknown) {
; CHECK-LABEL: define nofpclass(snan) half @pzero_or_nan__fadd_nsz__unknown(
; CHECK-SAME: half [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[PZERO_OR_NAN:%.*]] = call half @returns_pzero_or_nan()
; CHECK-NEXT:    [[ADD:%.*]] = fadd nsz half [[PZERO_OR_NAN]], [[UNKNOWN]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %pzero.or.nan = call half @returns_pzero_or_nan()
  %add = fadd nsz half %pzero.or.nan, %unknown
  ret half %add
}

define nofpclass(snan) half @unknown__fadd_nsz__zero(half %unknown) {
; CHECK-LABEL: define nofpclass(snan) half @unknown__fadd_nsz__zero(
; CHECK-SAME: half [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[ZERO:%.*]] = call half @returns_zero()
; CHECK-NEXT:    [[ADD:%.*]] = fadd nsz half [[UNKNOWN]], [[ZERO]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %zero = call half @returns_zero()
  %add = fadd nsz half %unknown, %zero
  ret half %add
}

define nofpclass(snan) half @zero__fadd_nsz__unknown(half %unknown) {
; CHECK-LABEL: define nofpclass(snan) half @zero__fadd_nsz__unknown(
; CHECK-SAME: half [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[ZERO:%.*]] = call half @returns_zero()
; CHECK-NEXT:    [[ADD:%.*]] = fadd nsz half [[ZERO]], [[UNKNOWN]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %zero = call half @returns_zero()
  %add = fadd nsz half %zero, %unknown
  ret half %add
}

define nofpclass(snan) half @unknown__fadd_nsz__zero_or_nan(half %unknown) {
; CHECK-LABEL: define nofpclass(snan) half @unknown__fadd_nsz__zero_or_nan(
; CHECK-SAME: half [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[ZERO_OR_NAN:%.*]] = call half @returns_zero()
; CHECK-NEXT:    [[ADD:%.*]] = fadd nsz half [[UNKNOWN]], [[ZERO_OR_NAN]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %zero.or.nan = call half @returns_zero()
  %add = fadd nsz half %unknown, %zero.or.nan
  ret half %add
}

define nofpclass(snan) half @zero_or_nan__fadd_nsz__unknown(half %unknown) {
; CHECK-LABEL: define nofpclass(snan) half @zero_or_nan__fadd_nsz__unknown(
; CHECK-SAME: half [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[ZERO_OR_NAN:%.*]] = call half @returns_zero_or_nan()
; CHECK-NEXT:    [[ADD:%.*]] = fadd nsz half [[ZERO_OR_NAN]], [[UNKNOWN]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %zero.or.nan = call half @returns_zero_or_nan()
  %add = fadd nsz half %zero.or.nan, %unknown
  ret half %add
}

define nofpclass(inf) half @nan_result_demands_nan_input_lhs(i1 %cond, half %unknown, half nofpclass(inf nan zero sub) %normal) {
; CHECK-LABEL: define nofpclass(inf) half @nan_result_demands_nan_input_lhs(
; CHECK-SAME: i1 [[COND:%.*]], half [[UNKNOWN:%.*]], half nofpclass(nan inf zero sub) [[NORMAL:%.*]]) {
; CHECK-NEXT:    [[NAN:%.*]] = call half @returns_nan()
; CHECK-NEXT:    [[SELECT:%.*]] = select i1 [[COND]], half [[NAN]], half [[UNKNOWN]]
; CHECK-NEXT:    [[ADD:%.*]] = fadd half [[SELECT]], [[NORMAL]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %nan = call half @returns_nan()
  %select = select i1 %cond, half %nan, half %unknown
  %add = fadd half %select, %normal
  ret half %add
}

define nofpclass(inf) half @nan_result_demands_nan_input_rhs(i1 %cond, half %unknown, half nofpclass(inf nan zero sub) %normal) {
; CHECK-LABEL: define nofpclass(inf) half @nan_result_demands_nan_input_rhs(
; CHECK-SAME: i1 [[COND:%.*]], half [[UNKNOWN:%.*]], half nofpclass(nan inf zero sub) [[NORMAL:%.*]]) {
; CHECK-NEXT:    [[NAN:%.*]] = call half @returns_nan()
; CHECK-NEXT:    [[SELECT:%.*]] = select i1 [[COND]], half [[NAN]], half [[UNKNOWN]]
; CHECK-NEXT:    [[ADD:%.*]] = fadd half [[NORMAL]], [[SELECT]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %nan = call half @returns_nan()
  %select = select i1 %cond, half %nan, half %unknown
  %add = fadd half %normal, %select
  ret half %add
}

define nofpclass(snan) half @not_nzero__fadd__pzero__daz(half nofpclass(nzero) %not.nzero) #0 {
; CHECK-LABEL: define nofpclass(snan) half @not_nzero__fadd__pzero__daz(
; CHECK-SAME: half nofpclass(nzero) [[NOT_NZERO:%.*]]) #[[ATTR0:[0-9]+]] {
; CHECK-NEXT:    [[PZERO:%.*]] = call half @returns_pzero()
; CHECK-NEXT:    ret half [[NOT_NZERO]]
;
  %pzero = call half @returns_pzero()
  %add = fadd half %not.nzero, %pzero
  ret half %add
}

define nofpclass(snan) half @pzero__fadd__not_nzero__daz(half nofpclass(nzero) %not.nzero) #0 {
; CHECK-LABEL: define nofpclass(snan) half @pzero__fadd__not_nzero__daz(
; CHECK-SAME: half nofpclass(nzero) [[NOT_NZERO:%.*]]) #[[ATTR0]] {
; CHECK-NEXT:    [[PZERO:%.*]] = call half @returns_pzero()
; CHECK-NEXT:    ret half [[NOT_NZERO]]
;
  %pzero = call half @returns_pzero()
  %add = fadd half %pzero, %not.nzero
  ret half %add
}

define nofpclass(snan) half @not_nzero__fadd__pzero__dynamic(half nofpclass(nzero) %not.nzero) #1 {
; CHECK-LABEL: define nofpclass(snan) half @not_nzero__fadd__pzero__dynamic(
; CHECK-SAME: half nofpclass(nzero) [[NOT_NZERO:%.*]]) #[[ATTR1:[0-9]+]] {
; CHECK-NEXT:    [[PZERO:%.*]] = call half @returns_pzero()
; CHECK-NEXT:    ret half [[NOT_NZERO]]
;
  %pzero = call half @returns_pzero()
  %add = fadd half %not.nzero, %pzero
  ret half %add
}

define nofpclass(snan) half @pzero__fadd__not_nzero__dynamic(half nofpclass(nzero) %not.nzero) #1 {
; CHECK-LABEL: define nofpclass(snan) half @pzero__fadd__not_nzero__dynamic(
; CHECK-SAME: half nofpclass(nzero) [[NOT_NZERO:%.*]]) #[[ATTR1]] {
; CHECK-NEXT:    [[PZERO:%.*]] = call half @returns_pzero()
; CHECK-NEXT:    ret half [[NOT_NZERO]]
;
  %pzero = call half @returns_pzero()
  %add = fadd half %pzero, %not.nzero
  ret half %add
}

define nofpclass(snan) half @not_nzero_nsub__fadd__pzero__daz(half nofpclass(nzero nsub) %not.nzero.nsub) #0 {
; CHECK-LABEL: define nofpclass(snan) half @not_nzero_nsub__fadd__pzero__daz(
; CHECK-SAME: half nofpclass(nzero nsub) [[NOT_NZERO_NSUB:%.*]]) #[[ATTR0]] {
; CHECK-NEXT:    [[PZERO:%.*]] = call half @returns_pzero()
; CHECK-NEXT:    ret half [[NOT_NZERO_NSUB]]
;
  %pzero = call half @returns_pzero()
  %add = fadd half %not.nzero.nsub, %pzero
  ret half %add
}

define nofpclass(snan) half @pzero__fadd__not_nzero_nsub__daz(half nofpclass(nzero nsub) %not.nzero.nsub) #0 {
; CHECK-LABEL: define nofpclass(snan) half @pzero__fadd__not_nzero_nsub__daz(
; CHECK-SAME: half nofpclass(nzero nsub) [[NOT_NZERO_NSUB:%.*]]) #[[ATTR0]] {
; CHECK-NEXT:    [[PZERO:%.*]] = call half @returns_pzero()
; CHECK-NEXT:    ret half [[NOT_NZERO_NSUB]]
;
  %pzero = call half @returns_pzero()
  %add = fadd half %pzero, %not.nzero.nsub
  ret half %add
}

define nofpclass(snan) half @not_nzero_nsub__fadd__pzero__dynamic(half nofpclass(nzero nsub) %not.nzero.nsub) #1 {
; CHECK-LABEL: define nofpclass(snan) half @not_nzero_nsub__fadd__pzero__dynamic(
; CHECK-SAME: half nofpclass(nzero nsub) [[NOT_NZERO_NSUB:%.*]]) #[[ATTR1]] {
; CHECK-NEXT:    [[PZERO:%.*]] = call half @returns_pzero()
; CHECK-NEXT:    ret half [[NOT_NZERO_NSUB]]
;
  %pzero = call half @returns_pzero()
  %add = fadd half %not.nzero.nsub, %pzero
  ret half %add
}

define nofpclass(snan) half @pzero__fadd__not_nzero_nsub__dynamic(half nofpclass(nzero nsub) %not.nzero.nsub) #1 {
; CHECK-LABEL: define nofpclass(snan) half @pzero__fadd__not_nzero_nsub__dynamic(
; CHECK-SAME: half nofpclass(nzero nsub) [[NOT_NZERO_NSUB:%.*]]) #[[ATTR1]] {
; CHECK-NEXT:    [[PZERO:%.*]] = call half @returns_pzero()
; CHECK-NEXT:    ret half [[NOT_NZERO_NSUB]]
;
  %pzero = call half @returns_pzero()
  %add = fadd half %pzero, %not.nzero.nsub
  ret half %add
}

; Cannot trim select
define nofpclass(ninf norm nsub zero) half @fadd_self__pinf_result_demands_pnorm_source(i1 %cond, half noundef %unknown) {
; CHECK-LABEL: define nofpclass(ninf zero nsub norm) half @fadd_self__pinf_result_demands_pnorm_source(
; CHECK-SAME: i1 [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[PNORM:%.*]] = call noundef half @returns_pnorm()
; CHECK-NEXT:    [[SELECT:%.*]] = select i1 [[COND]], half [[PNORM]], half [[UNKNOWN]]
; CHECK-NEXT:    [[ADD:%.*]] = fadd half [[SELECT]], [[SELECT]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %pnorm = call noundef half @returns_pnorm()
  %select = select i1 %cond, half %pnorm, half %unknown
  %add = fadd half %select, %select
  ret half %add
}

; Cannot trim select
define nofpclass(pinf norm psub zero) half @fadd_self__ninf_result_demands_nnorm_source(i1 %cond, half noundef %unknown) {
; CHECK-LABEL: define nofpclass(pinf zero psub norm) half @fadd_self__ninf_result_demands_nnorm_source(
; CHECK-SAME: i1 [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[NNORM:%.*]] = call noundef half @returns_nnorm()
; CHECK-NEXT:    [[SELECT:%.*]] = select i1 [[COND]], half [[NNORM]], half [[UNKNOWN]]
; CHECK-NEXT:    [[ADD:%.*]] = fadd half [[SELECT]], [[SELECT]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %nnorm = call noundef half @returns_nnorm()
  %select = select i1 %cond, half %nnorm, half %unknown
  %add = fadd half %select, %select
  ret half %add
}

; Cannot trim select
define nofpclass(norm sub zero) half @fadd_self__inf_result_demands_norm_source(i1 %cond, half noundef %unknown) {
; CHECK-LABEL: define nofpclass(zero sub norm) half @fadd_self__inf_result_demands_norm_source(
; CHECK-SAME: i1 [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[NORM:%.*]] = call noundef half @returns_norm()
; CHECK-NEXT:    [[SELECT:%.*]] = select i1 [[COND]], half [[NORM]], half [[UNKNOWN]]
; CHECK-NEXT:    [[ADD:%.*]] = fadd half [[SELECT]], [[SELECT]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %norm = call noundef half @returns_norm()
  %select = select i1 %cond, half %norm, half %unknown
  %add = fadd half %select, %select
  ret half %add
}

; Cannot trim select
define nofpclass(ninf nnorm sub zero) half @fadd_self__pnorm_result_demands_psub_source(i1 %cond, half noundef %unknown) {
; CHECK-LABEL: define nofpclass(ninf zero sub nnorm) half @fadd_self__pnorm_result_demands_psub_source(
; CHECK-SAME: i1 [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[PSUB:%.*]] = call noundef half @returns_psub()
; CHECK-NEXT:    [[SELECT:%.*]] = select i1 [[COND]], half [[PSUB]], half [[UNKNOWN]]
; CHECK-NEXT:    [[ADD:%.*]] = fadd half [[SELECT]], [[SELECT]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %psub = call noundef half @returns_psub()
  %select = select i1 %cond, half %psub, half %unknown
  %add = fadd half %select, %select
  ret half %add
}

; Cannot trim select
define nofpclass(ninf pnorm sub zero) half @fadd_self__nnorm_result_demands_nsub_source(i1 %cond, half noundef %unknown) {
; CHECK-LABEL: define nofpclass(ninf zero sub pnorm) half @fadd_self__nnorm_result_demands_nsub_source(
; CHECK-SAME: i1 [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[NSUB:%.*]] = call noundef half @returns_nsub()
; CHECK-NEXT:    [[SELECT:%.*]] = select i1 [[COND]], half [[NSUB]], half [[UNKNOWN]]
; CHECK-NEXT:    [[ADD:%.*]] = fadd half [[SELECT]], [[SELECT]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %nsub = call noundef half @returns_nsub()
  %select = select i1 %cond, half %nsub, half %unknown
  %add = fadd half %select, %select
  ret half %add
}

; Cannot trim select
define nofpclass(ninf sub zero) half @fadd_self__norm_result_demands_sub_source(i1 %cond, half noundef %unknown) {
; CHECK-LABEL: define nofpclass(ninf zero sub) half @fadd_self__norm_result_demands_sub_source(
; CHECK-SAME: i1 [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[SUB:%.*]] = call noundef half @returns_sub()
; CHECK-NEXT:    [[SELECT:%.*]] = select i1 [[COND]], half [[SUB]], half [[UNKNOWN]]
; CHECK-NEXT:    [[ADD:%.*]] = fadd half [[SELECT]], [[SELECT]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %sub = call noundef half @returns_sub()
  %select = select i1 %cond, half %sub, half %unknown
  %add = fadd half %select, %select
  ret half %add
}

; No zero output implies no zero inputs for fadd x, x
define nofpclass(zero) half @ret_nozero__fadd_self__nozero(half noundef nofpclass(zero) %not.zero) {
; CHECK-LABEL: define nofpclass(zero) half @ret_nozero__fadd_self__nozero(
; CHECK-SAME: half noundef nofpclass(zero) [[NOT_ZERO:%.*]]) {
; CHECK-NEXT:    [[ADD:%.*]] = fadd half [[NOT_ZERO]], [[NOT_ZERO]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %add = fadd half %not.zero, %not.zero
  ret half %add
}

; No zero output implies no zero inputs for fadd x, x, can trim select
define nofpclass(zero) half @ret_nozero__fadd_self__select_nozero(i1 %cond, half noundef %unknown) {
; CHECK-LABEL: define nofpclass(zero) half @ret_nozero__fadd_self__select_nozero(
; CHECK-SAME: i1 [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[ZERO:%.*]] = call noundef half @returns_zero()
; CHECK-NEXT:    [[SELECT:%.*]] = select i1 [[COND]], half [[ZERO]], half [[UNKNOWN]]
; CHECK-NEXT:    [[ADD:%.*]] = fadd half [[SELECT]], [[SELECT]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %zero = call noundef half @returns_zero()
  %select = select i1 %cond, half %zero, half %unknown
  %add = fadd half %select, %select
  ret half %add
}

; No zero output implies no zero inputs for fadd x, x, can trim select
define nofpclass(pzero) half @ret_nopzero__fadd_self__nopzero(i1 %cond, half noundef %unknown) {
; CHECK-LABEL: define nofpclass(pzero) half @ret_nopzero__fadd_self__nopzero(
; CHECK-SAME: i1 [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[PZERO:%.*]] = call noundef half @returns_pzero()
; CHECK-NEXT:    [[SELECT:%.*]] = select i1 [[COND]], half [[PZERO]], half [[UNKNOWN]]
; CHECK-NEXT:    [[ADD:%.*]] = fadd half [[SELECT]], [[SELECT]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %pzero = call noundef half @returns_pzero()
  %select = select i1 %cond, half %pzero, half %unknown
  %add = fadd half %select, %select
  ret half %add
}

; No zero output implies no zero inputs for fadd x, x, can trim select
define nofpclass(pzero) half @ret_nopzero__fadd_self__nonzero(i1 %cond, half noundef %unknown) {
; CHECK-LABEL: define nofpclass(pzero) half @ret_nopzero__fadd_self__nonzero(
; CHECK-SAME: i1 [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[NZERO:%.*]] = call noundef half @returns_nzero()
; CHECK-NEXT:    [[SELECT:%.*]] = select i1 [[COND]], half [[NZERO]], half [[UNKNOWN]]
; CHECK-NEXT:    [[ADD:%.*]] = fadd half [[SELECT]], [[SELECT]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %nzero = call noundef half @returns_nzero()
  %select = select i1 %cond, half %nzero, half %unknown
  %add = fadd half %select, %select
  ret half %add
}

; Cannot trim select
define nofpclass(inf) half @ret_noinf__fadd_self__noinf(i1 %cond, half noundef %unknown) {
; CHECK-LABEL: define nofpclass(inf) half @ret_noinf__fadd_self__noinf(
; CHECK-SAME: i1 [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[INF:%.*]] = call noundef half @returns_inf()
; CHECK-NEXT:    [[SELECT:%.*]] = select i1 [[COND]], half [[INF]], half [[UNKNOWN]]
; CHECK-NEXT:    [[ADD:%.*]] = fadd half [[SELECT]], [[SELECT]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %inf = call noundef half @returns_inf()
  %select = select i1 %cond, half %inf, half %unknown
  %add = fadd half %select, %select
  ret half %add
}

; Trim select
define nofpclass(nan) half @ret_nonan__fadd_self__nonan(i1 %cond, half noundef %unknown) {
; CHECK-LABEL: define nofpclass(nan) half @ret_nonan__fadd_self__nonan(
; CHECK-SAME: i1 [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[NAN:%.*]] = call noundef half @returns_nan()
; CHECK-NEXT:    [[ADD:%.*]] = fadd nnan half [[UNKNOWN]], [[UNKNOWN]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %nan = call noundef half @returns_nan()
  %select = select i1 %cond, half %nan, half %unknown
  %add = fadd half %select, %select
  ret half %add
}

define nofpclass(nan) half @ret_nonan__fadd_self__nonan_maybe_undef0(i1 %cond, half %unknown) {
; CHECK-LABEL: define nofpclass(nan) half @ret_nonan__fadd_self__nonan_maybe_undef0(
; CHECK-SAME: i1 [[COND:%.*]], half [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[NAN:%.*]] = call noundef half @returns_nan()
; CHECK-NEXT:    [[ADD:%.*]] = fadd nnan half [[UNKNOWN]], [[UNKNOWN]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %nan = call noundef half @returns_nan()
  %select = select i1 %cond, half %nan, half %unknown
  %add = fadd half %select, %select
  ret half %add
}

define nofpclass(nan) half @ret_nonan__fadd_self__nonan_maybe_undef1(i1 %cond, half noundef %unknown) {
; CHECK-LABEL: define nofpclass(nan) half @ret_nonan__fadd_self__nonan_maybe_undef1(
; CHECK-SAME: i1 [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[NAN:%.*]] = call half @returns_nan()
; CHECK-NEXT:    [[ADD:%.*]] = fadd nnan half [[UNKNOWN]], [[UNKNOWN]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %nan = call half @returns_nan()
  %select = select i1 %cond, half %nan, half %unknown
  %add = fadd half %select, %select
  ret half %add
}

define nofpclass(nan) half @ret_nonan__fadd_self__nonan__other_use(i1 %cond, half noundef %unknown) {
; CHECK-LABEL: define nofpclass(nan) half @ret_nonan__fadd_self__nonan__other_use(
; CHECK-SAME: i1 [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[NAN:%.*]] = call noundef half @returns_nan()
; CHECK-NEXT:    [[SELECT:%.*]] = select i1 [[COND]], half [[NAN]], half [[UNKNOWN]]
; CHECK-NEXT:    call void @use(half [[SELECT]])
; CHECK-NEXT:    [[ADD:%.*]] = fadd nnan half [[UNKNOWN]], [[UNKNOWN]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %nan = call noundef half @returns_nan()
  %select = select i1 %cond, half %nan, half %unknown
  call void @use(half %select)
  %add = fadd half %select, %select
  ret half %add
}

define nofpclass(sub) half @ret_nosub__fadd_self__nosub(i1 %cond, half noundef %unknown) {
; CHECK-LABEL: define nofpclass(sub) half @ret_nosub__fadd_self__nosub(
; CHECK-SAME: i1 [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[SUB:%.*]] = call noundef half @returns_sub()
; CHECK-NEXT:    [[SELECT:%.*]] = select i1 [[COND]], half [[SUB]], half [[UNKNOWN]]
; CHECK-NEXT:    [[ADD:%.*]] = fadd half [[SELECT]], [[SELECT]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %sub = call noundef half @returns_sub()
  %select = select i1 %cond, half %sub, half %unknown
  %add = fadd half %select, %select
  ret half %add
}

define nofpclass(nsub) half @ret_nonsub__fadd_self__nonsub(i1 %cond, half noundef %unknown) {
; CHECK-LABEL: define nofpclass(nsub) half @ret_nonsub__fadd_self__nonsub(
; CHECK-SAME: i1 [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[NSUB:%.*]] = call noundef half @returns_nsub()
; CHECK-NEXT:    [[SELECT:%.*]] = select i1 [[COND]], half [[NSUB]], half [[UNKNOWN]]
; CHECK-NEXT:    [[ADD:%.*]] = fadd half [[SELECT]], [[SELECT]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %nsub = call noundef half @returns_nsub()
  %select = select i1 %cond, half %nsub, half %unknown
  %add = fadd half %select, %select
  ret half %add
}

define nofpclass(psub) half @ret_nopsub__fadd_self__nopsub(i1 %cond, half noundef %unknown) {
; CHECK-LABEL: define nofpclass(psub) half @ret_nopsub__fadd_self__nopsub(
; CHECK-SAME: i1 [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[PSUB:%.*]] = call noundef half @returns_psub()
; CHECK-NEXT:    [[SELECT:%.*]] = select i1 [[COND]], half [[PSUB]], half [[UNKNOWN]]
; CHECK-NEXT:    [[ADD:%.*]] = fadd half [[SELECT]], [[SELECT]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %psub = call noundef half @returns_psub()
  %select = select i1 %cond, half %psub, half %unknown
  %add = fadd half %select, %select
  ret half %add
}

define nofpclass(norm) half @ret_nonorm__fadd_self__nonorm(i1 %cond, half noundef %unknown) {
; CHECK-LABEL: define nofpclass(norm) half @ret_nonorm__fadd_self__nonorm(
; CHECK-SAME: i1 [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[NORM:%.*]] = call noundef half @returns_norm()
; CHECK-NEXT:    [[SELECT:%.*]] = select i1 [[COND]], half [[NORM]], half [[UNKNOWN]]
; CHECK-NEXT:    [[ADD:%.*]] = fadd half [[SELECT]], [[SELECT]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %norm = call noundef half @returns_norm()
  %select = select i1 %cond, half %norm, half %unknown
  %add = fadd half %select, %select
  ret half %add
}

define nofpclass(nnorm) half @ret_nonnorm__fadd_self__nonnorm(i1 %cond, half noundef %unknown) {
; CHECK-LABEL: define nofpclass(nnorm) half @ret_nonnorm__fadd_self__nonnorm(
; CHECK-SAME: i1 [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[NNORM:%.*]] = call noundef half @returns_nnorm()
; CHECK-NEXT:    [[SELECT:%.*]] = select i1 [[COND]], half [[NNORM]], half [[UNKNOWN]]
; CHECK-NEXT:    [[ADD:%.*]] = fadd half [[SELECT]], [[SELECT]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %nnorm = call noundef half @returns_nnorm()
  %select = select i1 %cond, half %nnorm, half %unknown
  %add = fadd half %select, %select
  ret half %add
}

define nofpclass(pnorm) half @ret_nopnorm__fadd_self__nopnorm(i1 %cond, half noundef %unknown) {
; CHECK-LABEL: define nofpclass(pnorm) half @ret_nopnorm__fadd_self__nopnorm(
; CHECK-SAME: i1 [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[PNORM:%.*]] = call noundef half @returns_pnorm()
; CHECK-NEXT:    [[SELECT:%.*]] = select i1 [[COND]], half [[PNORM]], half [[UNKNOWN]]
; CHECK-NEXT:    [[ADD:%.*]] = fadd half [[SELECT]], [[SELECT]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %pnorm = call noundef half @returns_pnorm()
  %select = select i1 %cond, half %pnorm, half %unknown
  %add = fadd half %select, %select
  ret half %add
}

define nofpclass(ninf nnorm nsub nzero) half @ret_nonegative__fadd_self__nonegative(i1 %cond, half noundef %unknown) {
; CHECK-LABEL: define nofpclass(ninf nzero nsub nnorm) half @ret_nonegative__fadd_self__nonegative(
; CHECK-SAME: i1 [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[NEGATIVE:%.*]] = call noundef half @returns_negative()
; CHECK-NEXT:    [[SELECT:%.*]] = select i1 [[COND]], half [[NEGATIVE]], half [[UNKNOWN]]
; CHECK-NEXT:    [[ADD:%.*]] = fadd half [[SELECT]], [[SELECT]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %negative = call noundef half @returns_negative()
  %select = select i1 %cond, half %negative, half %unknown
  %add = fadd half %select, %select
  ret half %add
}

define nofpclass(pinf pnorm psub pzero) half @ret_nopositive__fadd_self__nopositive(i1 %cond, half noundef %unknown) {
; CHECK-LABEL: define nofpclass(pinf pzero psub pnorm) half @ret_nopositive__fadd_self__nopositive(
; CHECK-SAME: i1 [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[POSITIVE:%.*]] = call noundef half @returns_positive()
; CHECK-NEXT:    [[SELECT:%.*]] = select i1 [[COND]], half [[POSITIVE]], half [[UNKNOWN]]
; CHECK-NEXT:    [[ADD:%.*]] = fadd half [[SELECT]], [[SELECT]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %positive = call noundef half @returns_positive()
  %select = select i1 %cond, half %positive, half %unknown
  %add = fadd half %select, %select
  ret half %add
}

define nofpclass(ninf nnorm nsub nzero) half @ret_nonegative__fadd_self__nonegative_or_nan(i1 %cond, half noundef %unknown) {
; CHECK-LABEL: define nofpclass(ninf nzero nsub nnorm) half @ret_nonegative__fadd_self__nonegative_or_nan(
; CHECK-SAME: i1 [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[NEGATIVE_OR_NAN:%.*]] = call noundef half @returns_negative_or_nan()
; CHECK-NEXT:    [[SELECT:%.*]] = select i1 [[COND]], half [[NEGATIVE_OR_NAN]], half [[UNKNOWN]]
; CHECK-NEXT:    [[ADD:%.*]] = fadd half [[SELECT]], [[SELECT]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %negative.or.nan = call noundef half @returns_negative_or_nan()
  %select = select i1 %cond, half %negative.or.nan, half %unknown
  %add = fadd half %select, %select
  ret half %add
}

define nofpclass(pinf pnorm psub pzero) half @ret_nopositive__fadd_self__nopositive_or_nan(i1 %cond, half noundef %unknown) {
; CHECK-LABEL: define nofpclass(pinf pzero psub pnorm) half @ret_nopositive__fadd_self__nopositive_or_nan(
; CHECK-SAME: i1 [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[POSITIVE_OR_NAN:%.*]] = call noundef half @returns_positive_or_nan()
; CHECK-NEXT:    [[SELECT:%.*]] = select i1 [[COND]], half [[POSITIVE_OR_NAN]], half [[UNKNOWN]]
; CHECK-NEXT:    [[ADD:%.*]] = fadd half [[SELECT]], [[SELECT]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %positive.or.nan = call noundef half @returns_positive_or_nan()
  %select = select i1 %cond, half %positive.or.nan, half %unknown
  %add = fadd half %select, %select
  ret half %add
}

define nofpclass(nan ninf nnorm nsub nzero) half @ret_nonegative_nonan__fadd_self__nonegative_or_nan(i1 %cond, half noundef %unknown) {
; CHECK-LABEL: define nofpclass(nan ninf nzero nsub nnorm) half @ret_nonegative_nonan__fadd_self__nonegative_or_nan(
; CHECK-SAME: i1 [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[NEGATIVE_OR_NAN:%.*]] = call noundef half @returns_negative_or_nan()
; CHECK-NEXT:    [[SELECT:%.*]] = select i1 [[COND]], half [[NEGATIVE_OR_NAN]], half [[UNKNOWN]]
; CHECK-NEXT:    [[ADD:%.*]] = fadd nnan half [[SELECT]], [[SELECT]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %negative.or.nan = call noundef half @returns_negative_or_nan()
  %select = select i1 %cond, half %negative.or.nan, half %unknown
  %add = fadd half %select, %select
  ret half %add
}

define nofpclass(nan pinf pnorm psub pzero) half @ret_nopositive_nonan__fadd_self__nopositive_or_nan(i1 %cond, half noundef %unknown) {
; CHECK-LABEL: define nofpclass(nan pinf pzero psub pnorm) half @ret_nopositive_nonan__fadd_self__nopositive_or_nan(
; CHECK-SAME: i1 [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[POSITIVE_OR_NAN:%.*]] = call noundef half @returns_positive_or_nan()
; CHECK-NEXT:    [[SELECT:%.*]] = select i1 [[COND]], half [[POSITIVE_OR_NAN]], half [[UNKNOWN]]
; CHECK-NEXT:    [[ADD:%.*]] = fadd nnan half [[SELECT]], [[SELECT]]
; CHECK-NEXT:    ret half [[ADD]]
;
  %positive.or.nan = call noundef half @returns_positive_or_nan()
  %select = select i1 %cond, half %positive.or.nan, half %unknown
  %add = fadd half %select, %select
  ret half %add
}

define nofpclass(nan) half @ret_nonan_fneg_fabs_fadd_known_negative_or_nan_sources() {
; CHECK-LABEL: define nofpclass(nan) half @ret_nonan_fneg_fabs_fadd_known_negative_or_nan_sources() {
; CHECK-NEXT:    [[NEGATIVE_OR_NAN0:%.*]] = call half @returns_negative_or_nan()
; CHECK-NEXT:    [[NEGATIVE_OR_NAN1:%.*]] = call half @returns_negative_or_nan()
; CHECK-NEXT:    [[KNOWN_NEGATIVE_ADD:%.*]] = fadd nnan half [[NEGATIVE_OR_NAN0]], [[NEGATIVE_OR_NAN1]]
; CHECK-NEXT:    [[FABS:%.*]] = call half @llvm.fabs.f16(half [[KNOWN_NEGATIVE_ADD]])
; CHECK-NEXT:    [[NEG_FABS:%.*]] = fneg half [[FABS]]
; CHECK-NEXT:    ret half [[NEG_FABS]]
;
  %negative.or.nan0 = call half @returns_negative_or_nan()
  %negative.or.nan1 = call half @returns_negative_or_nan()
  %known.negative.add = fadd half %negative.or.nan0, %negative.or.nan1
  %fabs = call half @llvm.fabs.f16(half %known.negative.add)
  %neg.fabs = fneg half %fabs
  ret half %neg.fabs
}

define nofpclass(nan) half @ret_nonan_fneg_fabs_fadd_known_negative_sources() {
; CHECK-LABEL: define nofpclass(nan) half @ret_nonan_fneg_fabs_fadd_known_negative_sources() {
; CHECK-NEXT:    [[NEGATIVE0:%.*]] = call half @returns_negative()
; CHECK-NEXT:    [[NEGATIVE1:%.*]] = call half @returns_negative()
; CHECK-NEXT:    [[KNOWN_NEGATIVE_OP:%.*]] = fadd nnan half [[NEGATIVE0]], [[NEGATIVE1]]
; CHECK-NEXT:    [[FABS:%.*]] = call half @llvm.fabs.f16(half [[KNOWN_NEGATIVE_OP]])
; CHECK-NEXT:    [[NEG_FABS:%.*]] = fneg half [[FABS]]
; CHECK-NEXT:    ret half [[NEG_FABS]]
;
  %negative0 = call half @returns_negative()
  %negative1 = call half @returns_negative()
  %known.negative.op = fadd half %negative0, %negative1
  %fabs = call half @llvm.fabs.f16(half %known.negative.op)
  %neg.fabs = fneg half %fabs
  ret half %neg.fabs
}

define nofpclass(snan) half @ret_no_snan__known_positive_or_nan__fadd__known_negative_or_nan() {
; CHECK-LABEL: define nofpclass(snan) half @ret_no_snan__known_positive_or_nan__fadd__known_negative_or_nan() {
; CHECK-NEXT:    [[POSITIVE_OR_NAN:%.*]] = call half @returns_positive_or_nan()
; CHECK-NEXT:    [[NEGATIVE_OR_NAN:%.*]] = call half @returns_negative_or_nan()
; CHECK-NEXT:    [[RESULT:%.*]] = fadd half [[POSITIVE_OR_NAN]], [[NEGATIVE_OR_NAN]]
; CHECK-NEXT:    ret half [[RESULT]]
;
  %positive.or.nan = call half @returns_positive_or_nan()
  %negative.or.nan = call half @returns_negative_or_nan()
  %result = fadd half %positive.or.nan, %negative.or.nan
  ret half %result
}

define nofpclass(snan) half @ret_no_snan__known_negative_or_nan__fadd__known_positive_or_nan() {
; CHECK-LABEL: define nofpclass(snan) half @ret_no_snan__known_negative_or_nan__fadd__known_positive_or_nan() {
; CHECK-NEXT:    [[NEGATIVE_OR_NAN:%.*]] = call half @returns_negative_or_nan()
; CHECK-NEXT:    [[POSITIVE_OR_NAN:%.*]] = call half @returns_positive_or_nan()
; CHECK-NEXT:    [[RESULT:%.*]] = fadd half [[NEGATIVE_OR_NAN]], [[POSITIVE_OR_NAN]]
; CHECK-NEXT:    ret half [[RESULT]]
;
  %negative.or.nan = call half @returns_negative_or_nan()
  %positive.or.nan = call half @returns_positive_or_nan()
  %result = fadd half %negative.or.nan, %positive.or.nan
  ret half %result
}

define nofpclass(snan) half @ret_no_snan__known_positive__fadd__known_negative() {
; CHECK-LABEL: define nofpclass(snan) half @ret_no_snan__known_positive__fadd__known_negative() {
; CHECK-NEXT:    [[POSITIVE:%.*]] = call half @returns_positive_or_nan()
; CHECK-NEXT:    [[NEGATIVE:%.*]] = call half @returns_negative_or_nan()
; CHECK-NEXT:    [[RESULT:%.*]] = fadd half [[POSITIVE]], [[NEGATIVE]]
; CHECK-NEXT:    ret half [[RESULT]]
;
  %positive = call half @returns_positive_or_nan()
  %negative = call half @returns_negative_or_nan()
  %result = fadd half %positive, %negative
  ret half %result
}

define nofpclass(snan) half @ret_no_snan__known_negative__fadd__known_positive() {
; CHECK-LABEL: define nofpclass(snan) half @ret_no_snan__known_negative__fadd__known_positive() {
; CHECK-NEXT:    [[NEGATIVE:%.*]] = call half @returns_negative_or_nan()
; CHECK-NEXT:    [[POSITIVE:%.*]] = call half @returns_positive_or_nan()
; CHECK-NEXT:    [[RESULT:%.*]] = fadd half [[NEGATIVE]], [[POSITIVE]]
; CHECK-NEXT:    ret half [[RESULT]]
;
  %negative = call half @returns_negative_or_nan()
  %positive = call half @returns_positive_or_nan()
  %result = fadd half %negative, %positive
  ret half %result
}

;---------------------------------------------------------------------
; Check not-0 outupt handling with different denormal modes
;---------------------------------------------------------------------

; Can drop selects with daz
define nofpclass(norm sub) half @demand_zero_select_sub_source__fadd_self__ieee(i1 %cond, half noundef %unknown) {
; CHECK-LABEL: define nofpclass(sub norm) half @demand_zero_select_sub_source__fadd_self__ieee(
; CHECK-SAME: i1 [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[SUB:%.*]] = call noundef half @returns_sub()
; CHECK-NEXT:    ret half poison
;
  %sub = call noundef half @returns_sub()
  %select = select i1 %cond, half %unknown, half %sub
  %result = fadd half %sub, %sub
  ret half %result
}

define nofpclass(norm sub pzero) half @demand_nzero_select_nsub_source__fadd_self__ieee(i1 %cond, half noundef %unknown) {
; CHECK-LABEL: define nofpclass(pzero sub norm) half @demand_nzero_select_nsub_source__fadd_self__ieee(
; CHECK-SAME: i1 [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[NSUB:%.*]] = call noundef half @returns_nsub()
; CHECK-NEXT:    ret half poison
;
  %nsub = call noundef half @returns_nsub()
  %select = select i1 %cond, half %unknown, half %nsub
  %result = fadd half %nsub, %nsub
  ret half %result
}

define nofpclass(norm sub pzero) half @demand_nzero_select_psub_source__fadd_self__ieee(i1 %cond, half noundef %unknown) {
; CHECK-LABEL: define nofpclass(pzero sub norm) half @demand_nzero_select_psub_source__fadd_self__ieee(
; CHECK-SAME: i1 [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[PSUB:%.*]] = call noundef half @returns_psub()
; CHECK-NEXT:    ret half poison
;
  %psub = call noundef half @returns_psub()
  %select = select i1 %cond, half %unknown, half %psub
  %result = fadd half %psub, %psub
  ret half %result
}

define nofpclass(norm sub nzero) half @demand_pzero_select_psub_source__fadd_self__ieee(i1 %cond, half noundef %unknown) {
; CHECK-LABEL: define nofpclass(nzero sub norm) half @demand_pzero_select_psub_source__fadd_self__ieee(
; CHECK-SAME: i1 [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[PSUB:%.*]] = call noundef half @returns_psub()
; CHECK-NEXT:    ret half poison
;
  %psub = call noundef half @returns_psub()
  %select = select i1 %cond, half %unknown, half %psub
  %result = fadd half %psub, %psub
  ret half %result
}

define nofpclass(norm sub nzero) half @demand_pzero_select_nsub_source__fadd_self__ieee(i1 %cond, half noundef %unknown) {
; CHECK-LABEL: define nofpclass(nzero sub norm) half @demand_pzero_select_nsub_source__fadd_self__ieee(
; CHECK-SAME: i1 [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[NSUB:%.*]] = call noundef half @returns_nsub()
; CHECK-NEXT:    ret half poison
;
  %nsub = call noundef half @returns_nsub()
  %select = select i1 %cond, half %unknown, half %nsub
  %result = fadd half %nsub, %nsub
  ret half %result
}


; Must keep select if ftz or daz
define nofpclass(norm sub) half @demand_zero_select_sub_source__fadd_self__ftz_daz(i1 %cond, half noundef %unknown) #0 {
; CHECK-LABEL: define nofpclass(sub norm) half @demand_zero_select_sub_source__fadd_self__ftz_daz(
; CHECK-SAME: i1 [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) #[[ATTR0]] {
; CHECK-NEXT:    [[SUB:%.*]] = call noundef half @returns_sub()
; CHECK-NEXT:    [[RESULT:%.*]] = fadd nnan half [[SUB]], [[SUB]]
; CHECK-NEXT:    ret half [[RESULT]]
;
  %sub = call noundef half @returns_sub()
  %select = select i1 %cond, half %unknown, half %sub
  %result = fadd half %sub, %sub
  ret half %result
}

define nofpclass(norm sub pzero) half @demand_nzero_select_nsub_source__fadd_self__ftz_daz(i1 %cond, half noundef %unknown) #0 {
; CHECK-LABEL: define nofpclass(pzero sub norm) half @demand_nzero_select_nsub_source__fadd_self__ftz_daz(
; CHECK-SAME: i1 [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) #[[ATTR0]] {
; CHECK-NEXT:    [[NSUB:%.*]] = call noundef half @returns_nsub()
; CHECK-NEXT:    [[RESULT:%.*]] = fadd nnan half [[NSUB]], [[NSUB]]
; CHECK-NEXT:    ret half [[RESULT]]
;
  %nsub = call noundef half @returns_nsub()
  %select = select i1 %cond, half %unknown, half %nsub
  %result = fadd half %nsub, %nsub
  ret half %result
}

define nofpclass(norm sub pzero) half @demand_nzero_select_psub_source__fadd_self__ftz_daz(i1 %cond, half noundef %unknown) #0 {
; CHECK-LABEL: define nofpclass(pzero sub norm) half @demand_nzero_select_psub_source__fadd_self__ftz_daz(
; CHECK-SAME: i1 [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) #[[ATTR0]] {
; CHECK-NEXT:    [[PSUB:%.*]] = call noundef half @returns_psub()
; CHECK-NEXT:    ret half poison
;
  %psub = call noundef half @returns_psub()
  %select = select i1 %cond, half %unknown, half %psub
  %result = fadd half %psub, %psub
  ret half %result
}

define nofpclass(norm sub nzero) half @demand_pzero_select_psub_source__fadd_self__ftz_daz(i1 %cond, half noundef %unknown) #0 {
; CHECK-LABEL: define nofpclass(nzero sub norm) half @demand_pzero_select_psub_source__fadd_self__ftz_daz(
; CHECK-SAME: i1 [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) #[[ATTR0]] {
; CHECK-NEXT:    [[PSUB:%.*]] = call noundef half @returns_psub()
; CHECK-NEXT:    [[RESULT:%.*]] = fadd nnan half [[PSUB]], [[PSUB]]
; CHECK-NEXT:    ret half [[RESULT]]
;
  %psub = call noundef half @returns_psub()
  %select = select i1 %cond, half %unknown, half %psub
  %result = fadd half %psub, %psub
  ret half %result
}

define nofpclass(norm sub nzero) half @demand_pzero_select_nsub_source__fadd_self__ftz_daz(i1 %cond, half noundef %unknown) #0 {
; CHECK-LABEL: define nofpclass(nzero sub norm) half @demand_pzero_select_nsub_source__fadd_self__ftz_daz(
; CHECK-SAME: i1 [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) #[[ATTR0]] {
; CHECK-NEXT:    [[NSUB:%.*]] = call noundef half @returns_nsub()
; CHECK-NEXT:    ret half poison
;
  %nsub = call noundef half @returns_nsub()
  %select = select i1 %cond, half %unknown, half %nsub
  %result = fadd half %nsub, %nsub
  ret half %result
}


define nofpclass(norm sub) half @demand_zero_select_sub_source__fadd_self__ieee_daz(i1 %cond, half noundef %unknown) #2 {
; CHECK-LABEL: define nofpclass(sub norm) half @demand_zero_select_sub_source__fadd_self__ieee_daz(
; CHECK-SAME: i1 [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) #[[ATTR2:[0-9]+]] {
; CHECK-NEXT:    [[SUB:%.*]] = call noundef half @returns_sub()
; CHECK-NEXT:    [[RESULT:%.*]] = fadd nnan half [[SUB]], [[SUB]]
; CHECK-NEXT:    ret half [[RESULT]]
;
  %sub = call noundef half @returns_sub()
  %select = select i1 %cond, half %unknown, half %sub
  %result = fadd half %sub, %sub
  ret half %result
}

define nofpclass(norm sub pzero) half @demand_nzero_select_nsub_source__fadd_self__ieee_daz(i1 %cond, half noundef %unknown) #2 {
; CHECK-LABEL: define nofpclass(pzero sub norm) half @demand_nzero_select_nsub_source__fadd_self__ieee_daz(
; CHECK-SAME: i1 [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) #[[ATTR2]] {
; CHECK-NEXT:    [[NSUB:%.*]] = call noundef half @returns_nsub()
; CHECK-NEXT:    [[RESULT:%.*]] = fadd nnan half [[NSUB]], [[NSUB]]
; CHECK-NEXT:    ret half [[RESULT]]
;
  %nsub = call noundef half @returns_nsub()
  %select = select i1 %cond, half %unknown, half %nsub
  %result = fadd half %nsub, %nsub
  ret half %result
}

define nofpclass(norm sub pzero) half @demand_nzero_select_psub_source__fadd_self__ieee_daz(i1 %cond, half noundef %unknown) #2 {
; CHECK-LABEL: define nofpclass(pzero sub norm) half @demand_nzero_select_psub_source__fadd_self__ieee_daz(
; CHECK-SAME: i1 [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) #[[ATTR2]] {
; CHECK-NEXT:    [[PSUB:%.*]] = call noundef half @returns_psub()
; CHECK-NEXT:    ret half poison
;
  %psub = call noundef half @returns_psub()
  %select = select i1 %cond, half %unknown, half %psub
  %result = fadd half %psub, %psub
  ret half %result
}

define nofpclass(norm sub nzero) half @demand_pzero_select_psub_source__fadd_self__ieee_daz(i1 %cond, half noundef %unknown) #2 {
; CHECK-LABEL: define nofpclass(nzero sub norm) half @demand_pzero_select_psub_source__fadd_self__ieee_daz(
; CHECK-SAME: i1 [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) #[[ATTR2]] {
; CHECK-NEXT:    [[PSUB:%.*]] = call noundef half @returns_psub()
; CHECK-NEXT:    [[RESULT:%.*]] = fadd nnan half [[PSUB]], [[PSUB]]
; CHECK-NEXT:    ret half [[RESULT]]
;
  %psub = call noundef half @returns_psub()
  %select = select i1 %cond, half %unknown, half %psub
  %result = fadd half %psub, %psub
  ret half %result
}

define nofpclass(norm sub nzero) half @demand_pzero_select_nsub_source__fadd_self__ieee_daz(i1 %cond, half noundef %unknown) #2 {
; CHECK-LABEL: define nofpclass(nzero sub norm) half @demand_pzero_select_nsub_source__fadd_self__ieee_daz(
; CHECK-SAME: i1 [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) #[[ATTR2]] {
; CHECK-NEXT:    [[NSUB:%.*]] = call noundef half @returns_nsub()
; CHECK-NEXT:    ret half poison
;
  %nsub = call noundef half @returns_nsub()
  %select = select i1 %cond, half %unknown, half %nsub
  %result = fadd half %nsub, %nsub
  ret half %result
}


define nofpclass(norm sub) half @demand_zero_select_sub_source__fadd_self__ftz_ieee(i1 %cond, half noundef %unknown) #3 {
; CHECK-LABEL: define nofpclass(sub norm) half @demand_zero_select_sub_source__fadd_self__ftz_ieee(
; CHECK-SAME: i1 [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) #[[ATTR3:[0-9]+]] {
; CHECK-NEXT:    [[SUB:%.*]] = call noundef half @returns_sub()
; CHECK-NEXT:    [[RESULT:%.*]] = fadd nnan half [[SUB]], [[SUB]]
; CHECK-NEXT:    ret half [[RESULT]]
;
  %sub = call noundef half @returns_sub()
  %select = select i1 %cond, half %unknown, half %sub
  %result = fadd half %sub, %sub
  ret half %result
}

define nofpclass(norm sub pzero) half @demand_nzero_select_nsub_source__fadd_self__ftz_ieee(i1 %cond, half noundef %unknown) #3 {
; CHECK-LABEL: define nofpclass(pzero sub norm) half @demand_nzero_select_nsub_source__fadd_self__ftz_ieee(
; CHECK-SAME: i1 [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) #[[ATTR3]] {
; CHECK-NEXT:    [[NSUB:%.*]] = call noundef half @returns_nsub()
; CHECK-NEXT:    [[RESULT:%.*]] = fadd nnan half [[NSUB]], [[NSUB]]
; CHECK-NEXT:    ret half [[RESULT]]
;
  %nsub = call noundef half @returns_nsub()
  %select = select i1 %cond, half %unknown, half %nsub
  %result = fadd half %nsub, %nsub
  ret half %result
}

define nofpclass(norm sub pzero) half @demand_nzero_select_psub_source__fadd_self__ftz_ieee(i1 %cond, half noundef %unknown) #3 {
; CHECK-LABEL: define nofpclass(pzero sub norm) half @demand_nzero_select_psub_source__fadd_self__ftz_ieee(
; CHECK-SAME: i1 [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) #[[ATTR3]] {
; CHECK-NEXT:    [[PSUB:%.*]] = call noundef half @returns_psub()
; CHECK-NEXT:    ret half poison
;
  %psub = call noundef half @returns_psub()
  %select = select i1 %cond, half %unknown, half %psub
  %result = fadd half %psub, %psub
  ret half %result
}

define nofpclass(norm sub nzero) half @demand_pzero_select_psub_source__fadd_self__ftz_ieee(i1 %cond, half noundef %unknown) #3 {
; CHECK-LABEL: define nofpclass(nzero sub norm) half @demand_pzero_select_psub_source__fadd_self__ftz_ieee(
; CHECK-SAME: i1 [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) #[[ATTR3]] {
; CHECK-NEXT:    [[PSUB:%.*]] = call noundef half @returns_psub()
; CHECK-NEXT:    [[RESULT:%.*]] = fadd nnan half [[PSUB]], [[PSUB]]
; CHECK-NEXT:    ret half [[RESULT]]
;
  %psub = call noundef half @returns_psub()
  %select = select i1 %cond, half %unknown, half %psub
  %result = fadd half %psub, %psub
  ret half %result
}

define nofpclass(norm sub nzero) half @demand_pzero_select_nsub_source__fadd_self__ftz_ieee(i1 %cond, half noundef %unknown) #3 {
; CHECK-LABEL: define nofpclass(nzero sub norm) half @demand_pzero_select_nsub_source__fadd_self__ftz_ieee(
; CHECK-SAME: i1 [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) #[[ATTR3]] {
; CHECK-NEXT:    [[NSUB:%.*]] = call noundef half @returns_nsub()
; CHECK-NEXT:    ret half poison
;
  %nsub = call noundef half @returns_nsub()
  %select = select i1 %cond, half %unknown, half %nsub
  %result = fadd half %nsub, %nsub
  ret half %result
}


define nofpclass(norm sub) half @demand_zero_select_sub_source__fadd_self__dynamic_dynamic(i1 %cond, half noundef %unknown) #1 {
; CHECK-LABEL: define nofpclass(sub norm) half @demand_zero_select_sub_source__fadd_self__dynamic_dynamic(
; CHECK-SAME: i1 [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) #[[ATTR1]] {
; CHECK-NEXT:    [[SUB:%.*]] = call noundef half @returns_sub()
; CHECK-NEXT:    [[RESULT:%.*]] = fadd nnan half [[SUB]], [[SUB]]
; CHECK-NEXT:    ret half [[RESULT]]
;
  %sub = call noundef half @returns_sub()
  %select = select i1 %cond, half %unknown, half %sub
  %result = fadd half %sub, %sub
  ret half %result
}

define nofpclass(norm sub pzero) half @demand_nzero_select_nsub_source__fadd_self__dynamic_dynamic(i1 %cond, half noundef %unknown) #1 {
; CHECK-LABEL: define nofpclass(pzero sub norm) half @demand_nzero_select_nsub_source__fadd_self__dynamic_dynamic(
; CHECK-SAME: i1 [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) #[[ATTR1]] {
; CHECK-NEXT:    [[NSUB:%.*]] = call noundef half @returns_nsub()
; CHECK-NEXT:    [[RESULT:%.*]] = fadd nnan half [[NSUB]], [[NSUB]]
; CHECK-NEXT:    ret half [[RESULT]]
;
  %nsub = call noundef half @returns_nsub()
  %select = select i1 %cond, half %unknown, half %nsub
  %result = fadd half %nsub, %nsub
  ret half %result
}

define nofpclass(norm sub pzero) half @demand_nzero_select_psub_source__fadd__dynamic_dynamic(i1 %cond, half noundef %unknown) #1 {
; CHECK-LABEL: define nofpclass(pzero sub norm) half @demand_nzero_select_psub_source__fadd__dynamic_dynamic(
; CHECK-SAME: i1 [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) #[[ATTR1]] {
; CHECK-NEXT:    [[PSUB:%.*]] = call noundef half @returns_psub()
; CHECK-NEXT:    ret half poison
;
  %psub = call noundef half @returns_psub()
  %select = select i1 %cond, half %unknown, half %psub
  %result = fadd half %psub, %psub
  ret half %result
}

define nofpclass(norm sub nzero) half @demand_pzero_select_psub_source__fadd_self__dynamic_dynamic(i1 %cond, half noundef %unknown) #1 {
; CHECK-LABEL: define nofpclass(nzero sub norm) half @demand_pzero_select_psub_source__fadd_self__dynamic_dynamic(
; CHECK-SAME: i1 [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) #[[ATTR1]] {
; CHECK-NEXT:    [[PSUB:%.*]] = call noundef half @returns_psub()
; CHECK-NEXT:    [[RESULT:%.*]] = fadd nnan half [[PSUB]], [[PSUB]]
; CHECK-NEXT:    ret half [[RESULT]]
;
  %psub = call noundef half @returns_psub()
  %select = select i1 %cond, half %unknown, half %psub
  %result = fadd half %psub, %psub
  ret half %result
}

define nofpclass(norm sub nzero) half @demand_pzero_select_nsub_source__fadd_self__dynamic_dynamic(i1 %cond, half noundef %unknown) #1 {
; CHECK-LABEL: define nofpclass(nzero sub norm) half @demand_pzero_select_nsub_source__fadd_self__dynamic_dynamic(
; CHECK-SAME: i1 [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) #[[ATTR1]] {
; CHECK-NEXT:    [[NSUB:%.*]] = call noundef half @returns_nsub()
; CHECK-NEXT:    [[RESULT:%.*]] = fadd nnan half [[NSUB]], [[NSUB]]
; CHECK-NEXT:    ret half [[RESULT]]
;
  %nsub = call noundef half @returns_nsub()
  %select = select i1 %cond, half %unknown, half %nsub
  %result = fadd half %nsub, %nsub
  ret half %result
}


define nofpclass(norm sub) half @demand_zero_select_sub_source__fadd_self__ieee_dapz(i1 %cond, half noundef %unknown) #4 {
; CHECK-LABEL: define nofpclass(sub norm) half @demand_zero_select_sub_source__fadd_self__ieee_dapz(
; CHECK-SAME: i1 [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) #[[ATTR4:[0-9]+]] {
; CHECK-NEXT:    [[SUB:%.*]] = call noundef half @returns_sub()
; CHECK-NEXT:    [[RESULT:%.*]] = fadd nnan half [[SUB]], [[SUB]]
; CHECK-NEXT:    ret half [[RESULT]]
;
  %sub = call noundef half @returns_sub()
  %select = select i1 %cond, half %unknown, half %sub
  %result = fadd half %sub, %sub
  ret half %result
}

define nofpclass(norm sub pzero) half @demand_nzero_select_nsub_source__fadd_self__ieee_dapz(i1 %cond, half noundef %unknown) #4 {
; CHECK-LABEL: define nofpclass(pzero sub norm) half @demand_nzero_select_nsub_source__fadd_self__ieee_dapz(
; CHECK-SAME: i1 [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) #[[ATTR4]] {
; CHECK-NEXT:    [[NSUB:%.*]] = call noundef half @returns_nsub()
; CHECK-NEXT:    ret half -inf
;
  %nsub = call noundef half @returns_nsub()
  %select = select i1 %cond, half %unknown, half %nsub
  %result = fadd half %nsub, %nsub
  ret half %result
}

define nofpclass(norm sub pzero) half @demand_nzero_select_psub_source__fadd_self__ieee_dapz(i1 %cond, half noundef %unknown) #4 {
; CHECK-LABEL: define nofpclass(pzero sub norm) half @demand_nzero_select_psub_source__fadd_self__ieee_dapz(
; CHECK-SAME: i1 [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) #[[ATTR4]] {
; CHECK-NEXT:    [[PSUB:%.*]] = call noundef half @returns_psub()
; CHECK-NEXT:    ret half poison
;
  %psub = call noundef half @returns_psub()
  %select = select i1 %cond, half %unknown, half %psub
  %result = fadd half %psub, %psub
  ret half %result
}

define nofpclass(norm sub nzero) half @demand_pzero_select_psub_source__fadd_self__ieee_dapz(i1 %cond, half noundef %unknown) #4 {
; CHECK-LABEL: define nofpclass(nzero sub norm) half @demand_pzero_select_psub_source__fadd_self__ieee_dapz(
; CHECK-SAME: i1 [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) #[[ATTR4]] {
; CHECK-NEXT:    [[PSUB:%.*]] = call noundef half @returns_psub()
; CHECK-NEXT:    [[RESULT:%.*]] = fadd nnan half [[PSUB]], [[PSUB]]
; CHECK-NEXT:    ret half [[RESULT]]
;
  %psub = call noundef half @returns_psub()
  %select = select i1 %cond, half %unknown, half %psub
  %result = fadd half %psub, %psub
  ret half %result
}

; Special case, positive-zero result may be from negative denormal
define nofpclass(norm sub nzero) half @demand_pzero_select_nsub_source__fadd_self__ieee_dapz(i1 %cond, half noundef %unknown) #4 {
; CHECK-LABEL: define nofpclass(nzero sub norm) half @demand_pzero_select_nsub_source__fadd_self__ieee_dapz(
; CHECK-SAME: i1 [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) #[[ATTR4]] {
; CHECK-NEXT:    [[NSUB:%.*]] = call noundef half @returns_nsub()
; CHECK-NEXT:    [[RESULT:%.*]] = fadd nnan half [[NSUB]], [[NSUB]]
; CHECK-NEXT:    ret half [[RESULT]]
;
  %nsub = call noundef half @returns_nsub()
  %select = select i1 %cond, half %unknown, half %nsub
  %result = fadd half %nsub, %nsub
  ret half %result
}


define nofpclass(norm sub) half @demand_zero_select_sub_source__fadd_self__ftpz_ieee(i1 %cond, half noundef %unknown) #5 {
; CHECK-LABEL: define nofpclass(sub norm) half @demand_zero_select_sub_source__fadd_self__ftpz_ieee(
; CHECK-SAME: i1 [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) #[[ATTR5:[0-9]+]] {
; CHECK-NEXT:    [[SUB:%.*]] = call noundef half @returns_sub()
; CHECK-NEXT:    [[RESULT:%.*]] = fadd nnan half [[SUB]], [[SUB]]
; CHECK-NEXT:    ret half [[RESULT]]
;
  %sub = call noundef half @returns_sub()
  %select = select i1 %cond, half %unknown, half %sub
  %result = fadd half %sub, %sub
  ret half %result
}

define nofpclass(norm sub pzero) half @demand_nzero_select_nsub_source__fadd_self__ftpz_ieee(i1 %cond, half noundef %unknown) #5 {
; CHECK-LABEL: define nofpclass(pzero sub norm) half @demand_nzero_select_nsub_source__fadd_self__ftpz_ieee(
; CHECK-SAME: i1 [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) #[[ATTR5]] {
; CHECK-NEXT:    [[NSUB:%.*]] = call noundef half @returns_nsub()
; CHECK-NEXT:    ret half -inf
;
  %nsub = call noundef half @returns_nsub()
  %select = select i1 %cond, half %unknown, half %nsub
  %result = fadd half %nsub, %nsub
  ret half %result
}

define nofpclass(norm sub pzero) half @demand_nzero_select_psub_source__fadd_self__ftpz_ieee(i1 %cond, half noundef %unknown) #5 {
; CHECK-LABEL: define nofpclass(pzero sub norm) half @demand_nzero_select_psub_source__fadd_self__ftpz_ieee(
; CHECK-SAME: i1 [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) #[[ATTR5]] {
; CHECK-NEXT:    [[PSUB:%.*]] = call noundef half @returns_psub()
; CHECK-NEXT:    ret half poison
;
  %psub = call noundef half @returns_psub()
  %select = select i1 %cond, half %unknown, half %psub
  %result = fadd half %psub, %psub
  ret half %result
}

define nofpclass(norm sub nzero) half @demand_pzero_select_psub_source__fadd_self__ftpz_ieee(i1 %cond, half noundef %unknown) #5 {
; CHECK-LABEL: define nofpclass(nzero sub norm) half @demand_pzero_select_psub_source__fadd_self__ftpz_ieee(
; CHECK-SAME: i1 [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) #[[ATTR5]] {
; CHECK-NEXT:    [[PSUB:%.*]] = call noundef half @returns_psub()
; CHECK-NEXT:    [[RESULT:%.*]] = fadd nnan half [[PSUB]], [[PSUB]]
; CHECK-NEXT:    ret half [[RESULT]]
;
  %psub = call noundef half @returns_psub()
  %select = select i1 %cond, half %unknown, half %psub
  %result = fadd half %psub, %psub
  ret half %result
}

; Special case, positive-zero result may be from negative denormal
define nofpclass(norm sub nzero) half @demand_pzero_select_nsub_source__fadd_self__ftpz_ieee(i1 %cond, half noundef %unknown) #5 {
; CHECK-LABEL: define nofpclass(nzero sub norm) half @demand_pzero_select_nsub_source__fadd_self__ftpz_ieee(
; CHECK-SAME: i1 [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) #[[ATTR5]] {
; CHECK-NEXT:    [[NSUB:%.*]] = call noundef half @returns_nsub()
; CHECK-NEXT:    [[RESULT:%.*]] = fadd nnan half [[NSUB]], [[NSUB]]
; CHECK-NEXT:    ret half [[RESULT]]
;
  %nsub = call noundef half @returns_nsub()
  %select = select i1 %cond, half %unknown, half %nsub
  %result = fadd half %nsub, %nsub
  ret half %result
}

define nofpclass(snan) half @not_nan__fadd__inf_or_nan(half nofpclass(nan) %not.nan) {
; CHECK-LABEL: define nofpclass(snan) half @not_nan__fadd__inf_or_nan(
; CHECK-SAME: half nofpclass(nan) [[NOT_NAN:%.*]]) {
; CHECK-NEXT:    [[INF_OR_NAN:%.*]] = call half @returns_inf_or_nan()
; CHECK-NEXT:    [[RESULT:%.*]] = fadd half [[NOT_NAN]], [[INF_OR_NAN]]
; CHECK-NEXT:    ret half [[RESULT]]
;
  %inf.or.nan = call half @returns_inf_or_nan()
  %result = fadd half %not.nan, %inf.or.nan
  ret half %result
}

define nofpclass(snan) half @inf_or_nan__fadd__not_nan(half nofpclass(nan) %not.nan) {
; CHECK-LABEL: define nofpclass(snan) half @inf_or_nan__fadd__not_nan(
; CHECK-SAME: half nofpclass(nan) [[NOT_NAN:%.*]]) {
; CHECK-NEXT:    [[INF_OR_NAN:%.*]] = call half @returns_inf_or_nan()
; CHECK-NEXT:    [[RESULT:%.*]] = fadd half [[INF_OR_NAN]], [[NOT_NAN]]
; CHECK-NEXT:    ret half [[RESULT]]
;
  %inf.or.nan = call half @returns_inf_or_nan()
  %result = fadd half %inf.or.nan, %not.nan
  ret half %result
}

define nofpclass(snan) half @qnan_result_self_demands_snan(i1 noundef %cond, half noundef %unknown) {
; CHECK-LABEL: define nofpclass(snan) half @qnan_result_self_demands_snan(
; CHECK-SAME: i1 noundef [[COND:%.*]], half noundef [[UNKNOWN:%.*]]) {
; CHECK-NEXT:    [[SNAN:%.*]] = call noundef half @returns_snan()
; CHECK-NEXT:    [[SELECT:%.*]] = select i1 [[COND]], half [[SNAN]], half [[UNKNOWN]]
; CHECK-NEXT:    [[RESULT:%.*]] = fadd half [[SELECT]], [[SELECT]]
; CHECK-NEXT:    ret half [[RESULT]]
;
  %snan = call noundef half @returns_snan()
  %select = select i1 %cond, half %snan, half %unknown
  %result = fadd half %select, %select
  ret half %result
}

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

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

attributes #0 = { denormal_fpenv(preservesign) }
attributes #1 = { denormal_fpenv(dynamic) }
attributes #2 = { denormal_fpenv(ieee|preservesign) }
attributes #3 = { denormal_fpenv(preservesign|ieee) }
attributes #4 = { denormal_fpenv(ieee|positivezero) }
attributes #5 = { denormal_fpenv(positivezero|ieee) }