; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -passes=instcombine -S | FileCheck %s
define float @fadd_fpext_op0(float %x, double %y) {
; CHECK-LABEL: @fadd_fpext_op0(
; CHECK-NEXT: [[EXT:%.*]] = fpext float [[X:%.*]] to double
; CHECK-NEXT: [[BO:%.*]] = fadd reassoc double [[Y:%.*]], [[EXT]]
; CHECK-NEXT: [[R:%.*]] = fptrunc double [[BO]] to float
; CHECK-NEXT: ret float [[R]]
;
%ext = fpext float %x to double
%bo = fadd reassoc double %ext, %y
%r = fptrunc double %bo to float
ret float %r
}
define half @fsub_fpext_op1(half %x, double %y) {
; CHECK-LABEL: @fsub_fpext_op1(
; CHECK-NEXT: [[EXT:%.*]] = fpext half [[X:%.*]] to double
; CHECK-NEXT: [[BO:%.*]] = fsub reassoc double [[Y:%.*]], [[EXT]]
; CHECK-NEXT: [[R:%.*]] = fptrunc double [[BO]] to half
; CHECK-NEXT: ret half [[R]]
;
%ext = fpext half %x to double
%bo = fsub reassoc double %y, %ext
%r = fptrunc double %bo to half
ret half %r
}
define <2 x float> @fdiv_constant_op0(<2 x double> %x) {
; CHECK-LABEL: @fdiv_constant_op0(
; CHECK-NEXT: [[BO:%.*]] = fdiv reassoc <2 x double> <double 4.210000e+01, double -1.000000e-01>, [[X:%.*]]
; CHECK-NEXT: [[R:%.*]] = fptrunc <2 x double> [[BO]] to <2 x float>
; CHECK-NEXT: ret <2 x float> [[R]]
;
%bo = fdiv reassoc <2 x double> <double 42.1, double -0.1>, %x
%r = fptrunc <2 x double> %bo to <2 x float>
ret <2 x float> %r
}
define <2 x half> @fmul_constant_op1(<2 x float> %x) {
; CHECK-LABEL: @fmul_constant_op1(
; CHECK-NEXT: [[BO:%.*]] = fmul reassoc <2 x float> [[X:%.*]], <float 0x47EFFFFFE0000000, float 5.000000e-01>
; CHECK-NEXT: [[R:%.*]] = fptrunc <2 x float> [[BO]] to <2 x half>
; CHECK-NEXT: ret <2 x half> [[R]]
;
%bo = fmul reassoc <2 x float> %x, <float 0x47efffffe0000000, float 0.5>
%r = fptrunc <2 x float> %bo to <2 x half>
ret <2 x half> %r
}
define float @fptrunc_select_true_val(float %x, double %y, i1 %cond) {
; CHECK-LABEL: @fptrunc_select_true_val(
; CHECK-NEXT: [[TMP1:%.*]] = fptrunc double [[Y:%.*]] to float
; CHECK-NEXT: [[NARROW_SEL:%.*]] = select fast i1 [[COND:%.*]], float [[TMP1]], float [[X:%.*]]
; CHECK-NEXT: ret float [[NARROW_SEL]]
;
%e = fpext float %x to double
%sel = select fast i1 %cond, double %y, double %e
%r = fptrunc double %sel to float
ret float %r
}
define <2 x float> @fptrunc_select_false_val(<2 x float> %x, <2 x double> %y, <2 x i1> %cond) {
; CHECK-LABEL: @fptrunc_select_false_val(
; CHECK-NEXT: [[TMP1:%.*]] = fptrunc <2 x double> [[Y:%.*]] to <2 x float>
; CHECK-NEXT: [[NARROW_SEL:%.*]] = select nnan <2 x i1> [[COND:%.*]], <2 x float> [[X:%.*]], <2 x float> [[TMP1]]
; CHECK-NEXT: ret <2 x float> [[NARROW_SEL]]
;
%e = fpext <2 x float> %x to <2 x double>
%sel = select nnan <2 x i1> %cond, <2 x double> %e, <2 x double> %y
%r = fptrunc <2 x double> %sel to <2 x float>
ret <2 x float> %r
}
declare void @use(float)
define half @fptrunc_select_true_val_extra_use(half %x, float %y, i1 %cond) {
; CHECK-LABEL: @fptrunc_select_true_val_extra_use(
; CHECK-NEXT: [[E:%.*]] = fpext half [[X:%.*]] to float
; CHECK-NEXT: call void @use(float [[E]])
; CHECK-NEXT: [[TMP1:%.*]] = fptrunc float [[Y:%.*]] to half
; CHECK-NEXT: [[NARROW_SEL:%.*]] = select ninf i1 [[COND:%.*]], half [[TMP1]], half [[X]]
; CHECK-NEXT: ret half [[NARROW_SEL]]
;
%e = fpext half %x to float
call void @use(float %e)
%sel = select ninf i1 %cond, float %y, float %e
%r = fptrunc float %sel to half
ret half %r
}
; Negative test - this would require an extra instruction.
define half @fptrunc_select_true_val_extra_use_2(half %x, float %y, i1 %cond) {
; CHECK-LABEL: @fptrunc_select_true_val_extra_use_2(
; CHECK-NEXT: [[E:%.*]] = fpext half [[X:%.*]] to float
; CHECK-NEXT: [[SEL:%.*]] = select ninf i1 [[COND:%.*]], float [[Y:%.*]], float [[E]]
; CHECK-NEXT: call void @use(float [[SEL]])
; CHECK-NEXT: [[R:%.*]] = fptrunc float [[SEL]] to half
; CHECK-NEXT: ret half [[R]]
;
%e = fpext half %x to float
%sel = select ninf i1 %cond, float %y, float %e
call void @use(float %sel)
%r = fptrunc float %sel to half
ret half %r
}
; Negative test - the extend must be from the same source type as the result of the trunc.
define float @fptrunc_select_true_val_type_mismatch(half %x, double %y, i1 %cond) {
; CHECK-LABEL: @fptrunc_select_true_val_type_mismatch(
; CHECK-NEXT: [[E:%.*]] = fpext half [[X:%.*]] to double
; CHECK-NEXT: [[SEL:%.*]] = select i1 [[COND:%.*]], double [[Y:%.*]], double [[E]]
; CHECK-NEXT: [[R:%.*]] = fptrunc double [[SEL]] to float
; CHECK-NEXT: ret float [[R]]
;
%e = fpext half %x to double
%sel = select i1 %cond, double %y, double %e
%r = fptrunc double %sel to float
ret float %r
}
; Negative test - but given enough FMF, should this be folded?
define float @fptrunc_select_true_val_type_mismatch_fast(half %x, double %y, i1 %cond) {
; CHECK-LABEL: @fptrunc_select_true_val_type_mismatch_fast(
; CHECK-NEXT: [[E:%.*]] = fpext half [[X:%.*]] to double
; CHECK-NEXT: [[SEL:%.*]] = select fast i1 [[COND:%.*]], double [[Y:%.*]], double [[E]]
; CHECK-NEXT: [[R:%.*]] = fptrunc double [[SEL]] to float
; CHECK-NEXT: ret float [[R]]
;
%e = fpext half %x to double
%sel = select fast i1 %cond, double %y, double %e
%r = fptrunc double %sel to float
ret float %r
}
; Convert from integer is exact, so convert directly to float.
define <2 x float> @ItoFtoF_s54_f64_f32(<2 x i54> %i) {
; CHECK-LABEL: @ItoFtoF_s54_f64_f32(
; CHECK-NEXT: [[R:%.*]] = sitofp <2 x i54> [[I:%.*]] to <2 x float>
; CHECK-NEXT: ret <2 x float> [[R]]
;
%x = sitofp <2 x i54> %i to <2 x double>
%r = fptrunc <2 x double> %x to <2 x float>
ret <2 x float> %r
}
; Convert from integer is exact, so convert directly to half.
; Extra use is ok.
define half @ItoFtoF_u24_f32_f16(i24 %i) {
; CHECK-LABEL: @ItoFtoF_u24_f32_f16(
; CHECK-NEXT: [[X:%.*]] = uitofp i24 [[I:%.*]] to float
; CHECK-NEXT: call void @use(float [[X]])
; CHECK-NEXT: [[R:%.*]] = uitofp i24 [[I]] to half
; CHECK-NEXT: ret half [[R]]
;
%x = uitofp i24 %i to float
call void @use(float %x)
%r = fptrunc float %x to half
ret half %r
}
; Negative test - intermediate rounding in float type.
define float @ItoFtoF_s55_f64_f32(i55 %i) {
; CHECK-LABEL: @ItoFtoF_s55_f64_f32(
; CHECK-NEXT: [[X:%.*]] = sitofp i55 [[I:%.*]] to double
; CHECK-NEXT: [[R:%.*]] = fptrunc double [[X]] to float
; CHECK-NEXT: ret float [[R]]
;
%x = sitofp i55 %i to double
%r = fptrunc double %x to float
ret float %r
}
; Negative test - intermediate rounding in float type.
define half @ItoFtoF_u25_f32_f16(i25 %i) {
; CHECK-LABEL: @ItoFtoF_u25_f32_f16(
; CHECK-NEXT: [[X:%.*]] = uitofp i25 [[I:%.*]] to float
; CHECK-NEXT: [[R:%.*]] = fptrunc float [[X]] to half
; CHECK-NEXT: ret half [[R]]
;
%x = uitofp i25 %i to float
%r = fptrunc float %x to half
ret half %r
}
; Negative test - bitcast bfloat to half is not optimized
define half @fptrunc_to_bfloat_bitcast_to_half(float %src) {
; CHECK-LABEL: @fptrunc_to_bfloat_bitcast_to_half(
; CHECK-NEXT: [[TRUNC:%.*]] = fptrunc float [[SRC:%.*]] to bfloat
; CHECK-NEXT: [[CAST:%.*]] = bitcast bfloat [[TRUNC]] to half
; CHECK-NEXT: ret half [[CAST]]
;
%trunc = fptrunc float %src to bfloat
%cast = bitcast bfloat %trunc to half
ret half %cast
}
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