; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -passes=instcombine -S | FileCheck %s
declare float @llvm.ldexp.f32.i32(float, i32)
declare <2 x float> @llvm.ldexp.v2f32.v2i32(<2 x float>, <2 x i32>)
declare void @use(float)
define float @fneg_fneg(float %a) {
;
; CHECK-LABEL: @fneg_fneg(
; CHECK-NEXT: ret float [[A:%.*]]
;
%f = fneg float %a
%r = fneg float %f
ret float %r
}
; -(X * C) --> X * (-C)
define float @fmul_fsub(float %x) {
; CHECK-LABEL: @fmul_fsub(
; CHECK-NEXT: [[R:%.*]] = fmul float [[X:%.*]], -4.200000e+01
; CHECK-NEXT: ret float [[R]]
;
%m = fmul float %x, 42.0
%r = fsub float -0.0, %m
ret float %r
}
define float @fmul_fneg(float %x) {
; CHECK-LABEL: @fmul_fneg(
; CHECK-NEXT: [[R:%.*]] = fmul float [[X:%.*]], -4.200000e+01
; CHECK-NEXT: ret float [[R]]
;
%m = fmul float %x, 42.0
%r = fneg float %m
ret float %r
}
; Fast math is not required, but it should be propagated.
define float @fmul_fsub_fmf(float %x) {
; CHECK-LABEL: @fmul_fsub_fmf(
; CHECK-NEXT: [[R:%.*]] = fmul reassoc nsz float [[X:%.*]], -4.200000e+01
; CHECK-NEXT: ret float [[R]]
;
%m = fmul float %x, 42.0
%r = fsub reassoc nsz float -0.0, %m
ret float %r
}
define float @fmul_fneg_fmf(float %x) {
; CHECK-LABEL: @fmul_fneg_fmf(
; CHECK-NEXT: [[R:%.*]] = fmul reassoc nsz float [[X:%.*]], -4.200000e+01
; CHECK-NEXT: ret float [[R]]
;
%m = fmul float %x, 42.0
%r = fneg reassoc nsz float %m
ret float %r
}
; Extra use prevents the fold. We don't want to replace the fneg with an fmul.
define float @fmul_fsub_extra_use(float %x) {
; CHECK-LABEL: @fmul_fsub_extra_use(
; CHECK-NEXT: [[M:%.*]] = fmul float [[X:%.*]], 4.200000e+01
; CHECK-NEXT: [[R:%.*]] = fneg float [[M]]
; CHECK-NEXT: call void @use(float [[M]])
; CHECK-NEXT: ret float [[R]]
;
%m = fmul float %x, 42.0
%r = fsub float -0.0, %m
call void @use(float %m)
ret float %r
}
define float @fmul_fneg_extra_use(float %x) {
; CHECK-LABEL: @fmul_fneg_extra_use(
; CHECK-NEXT: [[M:%.*]] = fmul float [[X:%.*]], 4.200000e+01
; CHECK-NEXT: [[R:%.*]] = fneg float [[M]]
; CHECK-NEXT: call void @use(float [[M]])
; CHECK-NEXT: ret float [[R]]
;
%m = fmul float %x, 42.0
%r = fneg float %m
call void @use(float %m)
ret float %r
}
; Try a vector. Use special constants (NaN, INF, poison) because they don't change anything.
define <4 x double> @fmul_fsub_vec(<4 x double> %x) {
; CHECK-LABEL: @fmul_fsub_vec(
; CHECK-NEXT: [[R:%.*]] = fmul <4 x double> [[X:%.*]], <double -4.200000e+01, double 0xFFF8000000000000, double 0xFFF0000000000000, double poison>
; CHECK-NEXT: ret <4 x double> [[R]]
;
%m = fmul <4 x double> %x, <double 42.0, double 0x7FF8000000000000, double 0x7FF0000000000000, double poison>
%r = fsub <4 x double> <double -0.0, double -0.0, double -0.0, double -0.0>, %m
ret <4 x double> %r
}
define <4 x double> @fmul_fneg_vec(<4 x double> %x) {
; CHECK-LABEL: @fmul_fneg_vec(
; CHECK-NEXT: [[R:%.*]] = fmul <4 x double> [[X:%.*]], <double -4.200000e+01, double 0xFFF8000000000000, double 0xFFF0000000000000, double poison>
; CHECK-NEXT: ret <4 x double> [[R]]
;
%m = fmul <4 x double> %x, <double 42.0, double 0x7FF8000000000000, double 0x7FF0000000000000, double poison>
%r = fneg <4 x double> %m
ret <4 x double> %r
}
; -(X / C) --> X / (-C)
define float @fdiv_op1_constant_fsub(float %x) {
; CHECK-LABEL: @fdiv_op1_constant_fsub(
; CHECK-NEXT: [[R:%.*]] = fdiv float [[X:%.*]], 4.200000e+01
; CHECK-NEXT: ret float [[R]]
;
%d = fdiv float %x, -42.0
%r = fsub float -0.0, %d
ret float %r
}
define float @fdiv_op1_constant_fneg(float %x) {
; CHECK-LABEL: @fdiv_op1_constant_fneg(
; CHECK-NEXT: [[R:%.*]] = fdiv float [[X:%.*]], 4.200000e+01
; CHECK-NEXT: ret float [[R]]
;
%d = fdiv float %x, -42.0
%r = fneg float %d
ret float %r
}
; Fast math is not required, but it should be propagated.
define float @fdiv_op1_constant_fsub_fmf(float %x) {
; CHECK-LABEL: @fdiv_op1_constant_fsub_fmf(
; CHECK-NEXT: [[R:%.*]] = fdiv nnan float [[X:%.*]], 4.200000e+01
; CHECK-NEXT: ret float [[R]]
;
%d = fdiv float %x, -42.0
%r = fsub nnan float -0.0, %d
ret float %r
}
define float @fdiv_op1_constant_fneg_fmf(float %x) {
; CHECK-LABEL: @fdiv_op1_constant_fneg_fmf(
; CHECK-NEXT: [[R:%.*]] = fdiv nnan float [[X:%.*]], 4.200000e+01
; CHECK-NEXT: ret float [[R]]
;
%d = fdiv float %x, -42.0
%r = fneg nnan float %d
ret float %r
}
; Extra use prevents the fold. We don't want to replace the fneg with an fdiv.
define float @fdiv_op1_constant_fsub_extra_use(float %x) {
; CHECK-LABEL: @fdiv_op1_constant_fsub_extra_use(
; CHECK-NEXT: [[D:%.*]] = fdiv float [[X:%.*]], 4.200000e+01
; CHECK-NEXT: [[R:%.*]] = fneg float [[D]]
; CHECK-NEXT: call void @use(float [[D]])
; CHECK-NEXT: ret float [[R]]
;
%d = fdiv float %x, 42.0
%r = fsub float -0.0, %d
call void @use(float %d)
ret float %r
}
define float @fdiv_op1_constant_fneg_extra_use(float %x) {
; CHECK-LABEL: @fdiv_op1_constant_fneg_extra_use(
; CHECK-NEXT: [[D:%.*]] = fdiv float [[X:%.*]], 4.200000e+01
; CHECK-NEXT: [[R:%.*]] = fneg float [[D]]
; CHECK-NEXT: call void @use(float [[D]])
; CHECK-NEXT: ret float [[R]]
;
%d = fdiv float %x, 42.0
%r = fneg float %d
call void @use(float %d)
ret float %r
}
; Try a vector. Use special constants (NaN, INF, poison) because they don't change anything.
define <4 x double> @fdiv_op1_constant_fsub_vec(<4 x double> %x) {
; CHECK-LABEL: @fdiv_op1_constant_fsub_vec(
; CHECK-NEXT: [[R:%.*]] = fdiv <4 x double> [[X:%.*]], <double 4.200000e+01, double 0x7FF800000ABCD000, double 0x7FF0000000000000, double poison>
; CHECK-NEXT: ret <4 x double> [[R]]
;
%d = fdiv <4 x double> %x, <double -42.0, double 0xFFF800000ABCD000, double 0xFFF0000000000000, double poison>
%r = fsub <4 x double> <double -0.0, double -0.0, double -0.0, double -0.0>, %d
ret <4 x double> %r
}
define <4 x double> @fdiv_op1_constant_fneg_vec(<4 x double> %x) {
; CHECK-LABEL: @fdiv_op1_constant_fneg_vec(
; CHECK-NEXT: [[R:%.*]] = fdiv <4 x double> [[X:%.*]], <double 4.200000e+01, double 0x7FF800000ABCD000, double 0x7FF0000000000000, double poison>
; CHECK-NEXT: ret <4 x double> [[R]]
;
%d = fdiv <4 x double> %x, <double -42.0, double 0xFFF800000ABCD000, double 0xFFF0000000000000, double poison>
%r = fneg <4 x double> %d
ret <4 x double> %r
}
; -(C / X) --> (-C) / X
define float @fdiv_op0_constant_fsub(float %x) {
; CHECK-LABEL: @fdiv_op0_constant_fsub(
; CHECK-NEXT: [[R:%.*]] = fdiv float -4.200000e+01, [[X:%.*]]
; CHECK-NEXT: ret float [[R]]
;
%d = fdiv float 42.0, %x
%r = fsub float -0.0, %d
ret float %r
}
define float @fdiv_op0_constant_fneg(float %x) {
; CHECK-LABEL: @fdiv_op0_constant_fneg(
; CHECK-NEXT: [[R:%.*]] = fdiv float -4.200000e+01, [[X:%.*]]
; CHECK-NEXT: ret float [[R]]
;
%d = fdiv float 42.0, %x
%r = fneg float %d
ret float %r
}
; Fast math is not required, but it should be propagated.
define float @fdiv_op0_constant_fneg_fast_fast(float %x) {
; CHECK-LABEL: @fdiv_op0_constant_fneg_fast_fast(
; CHECK-NEXT: [[R:%.*]] = fdiv fast float -4.200000e+01, [[X:%.*]]
; CHECK-NEXT: ret float [[R]]
;
%d = fdiv fast float 42.0, %x
%r = fneg fast float %d
ret float %r
}
define float @fdiv_op0_constant_fneg_fast(float %x) {
; CHECK-LABEL: @fdiv_op0_constant_fneg_fast(
; CHECK-NEXT: [[R:%.*]] = fdiv reassoc nnan arcp contract afn float -4.200000e+01, [[X:%.*]]
; CHECK-NEXT: ret float [[R]]
;
%d = fdiv float 42.0, %x
%r = fneg fast float %d
ret float %r
}
define float @fdiv_op0_constant_fneg_nsz_nsz(float %x) {
; CHECK-LABEL: @fdiv_op0_constant_fneg_nsz_nsz(
; CHECK-NEXT: [[R:%.*]] = fdiv nsz float -4.200000e+01, [[X:%.*]]
; CHECK-NEXT: ret float [[R]]
;
%d = fdiv nsz float 42.0, %x
%r = fneg nsz float %d
ret float %r
}
define float @fdiv_op0_constant_fneg_nsz(float %x) {
; CHECK-LABEL: @fdiv_op0_constant_fneg_nsz(
; CHECK-NEXT: [[R:%.*]] = fdiv float -4.200000e+01, [[X:%.*]]
; CHECK-NEXT: ret float [[R]]
;
%d = fdiv float 42.0, %x
%r = fneg nsz float %d
ret float %r
}
define float @fdiv_op0_constant_fneg_ninf_ninf(float %x) {
; CHECK-LABEL: @fdiv_op0_constant_fneg_ninf_ninf(
; CHECK-NEXT: [[R:%.*]] = fdiv ninf float -4.200000e+01, [[X:%.*]]
; CHECK-NEXT: ret float [[R]]
;
%d = fdiv ninf float 42.0, %x
%r = fneg ninf float %d
ret float %r
}
define float @fdiv_op0_constant_fneg_ninf(float %x) {
; CHECK-LABEL: @fdiv_op0_constant_fneg_ninf(
; CHECK-NEXT: [[R:%.*]] = fdiv float -4.200000e+01, [[X:%.*]]
; CHECK-NEXT: ret float [[R]]
;
%d = fdiv float 42.0, %x
%r = fneg ninf float %d
ret float %r
}
define float @fdiv_op0_constant_fneg_nnan_nnan(float %x) {
; CHECK-LABEL: @fdiv_op0_constant_fneg_nnan_nnan(
; CHECK-NEXT: [[R:%.*]] = fdiv nnan float -4.200000e+01, [[X:%.*]]
; CHECK-NEXT: ret float [[R]]
;
%d = fdiv nnan float 42.0, %x
%r = fneg nnan float %d
ret float %r
}
define float @fdiv_op0_constant_fneg_nnan(float %x) {
; CHECK-LABEL: @fdiv_op0_constant_fneg_nnan(
; CHECK-NEXT: [[R:%.*]] = fdiv nnan float -4.200000e+01, [[X:%.*]]
; CHECK-NEXT: ret float [[R]]
;
%d = fdiv float 42.0, %x
%r = fneg nnan float %d
ret float %r
}
; Extra use prevents the fold. We don't want to replace the fneg with an fdiv.
define float @fdiv_op0_constant_fsub_extra_use(float %x) {
; CHECK-LABEL: @fdiv_op0_constant_fsub_extra_use(
; CHECK-NEXT: [[D:%.*]] = fdiv float -4.200000e+01, [[X:%.*]]
; CHECK-NEXT: [[R:%.*]] = fneg float [[D]]
; CHECK-NEXT: call void @use(float [[D]])
; CHECK-NEXT: ret float [[R]]
;
%d = fdiv float -42.0, %x
%r = fsub float -0.0, %d
call void @use(float %d)
ret float %r
}
define float @fdiv_op0_constant_fneg_extra_use(float %x) {
; CHECK-LABEL: @fdiv_op0_constant_fneg_extra_use(
; CHECK-NEXT: [[D:%.*]] = fdiv float -4.200000e+01, [[X:%.*]]
; CHECK-NEXT: [[R:%.*]] = fneg float [[D]]
; CHECK-NEXT: call void @use(float [[D]])
; CHECK-NEXT: ret float [[R]]
;
%d = fdiv float -42.0, %x
%r = fneg float %d
call void @use(float %d)
ret float %r
}
; Try a vector. Use special constants (NaN, INF, poison) because they don't change anything.
define <4 x double> @fdiv_op0_constant_fsub_vec(<4 x double> %x) {
; CHECK-LABEL: @fdiv_op0_constant_fsub_vec(
; CHECK-NEXT: [[R:%.*]] = fdiv <4 x double> <double 4.200000e+01, double 0xFFF8000000000000, double 0x7FF0000000000000, double poison>, [[X:%.*]]
; CHECK-NEXT: ret <4 x double> [[R]]
;
%d = fdiv <4 x double> <double -42.0, double 0x7FF8000000000000, double 0xFFF0000000000000, double poison>, %x
%r = fsub <4 x double> <double -0.0, double -0.0, double -0.0, double -0.0>, %d
ret <4 x double> %r
}
define <4 x double> @fdiv_op0_constant_fneg_vec(<4 x double> %x) {
; CHECK-LABEL: @fdiv_op0_constant_fneg_vec(
; CHECK-NEXT: [[R:%.*]] = fdiv <4 x double> <double 4.200000e+01, double 0xFFF8000000000000, double 0x7FF0000000000000, double poison>, [[X:%.*]]
; CHECK-NEXT: ret <4 x double> [[R]]
;
%d = fdiv <4 x double> <double -42.0, double 0x7FF8000000000000, double 0xFFF0000000000000, double poison>, %x
%r = fneg <4 x double> %d
ret <4 x double> %r
}
; Sink FP negation through a select:
; c ? -x : -y --> -(c ? x : y)
define <2 x double> @fneg_fneg_sel(<2 x double> %x, <2 x double> %y, i1 %cond) {
; CHECK-LABEL: @fneg_fneg_sel(
; CHECK-NEXT: [[SEL_V:%.*]] = select i1 [[COND:%.*]], <2 x double> [[X:%.*]], <2 x double> [[Y:%.*]]
; CHECK-NEXT: [[SEL:%.*]] = fneg <2 x double> [[SEL_V]]
; CHECK-NEXT: ret <2 x double> [[SEL]]
;
%n1 = fneg <2 x double> %x
%n2 = fneg <2 x double> %y
%sel = select i1 %cond, <2 x double> %n1, <2 x double> %n2
ret <2 x double> %sel
}
; An extra use is allowed.
define float @fneg_fneg_sel_extra_use1(float %x, float %y, i1 %cond) {
; CHECK-LABEL: @fneg_fneg_sel_extra_use1(
; CHECK-NEXT: [[N1:%.*]] = fneg float [[X:%.*]]
; CHECK-NEXT: call void @use(float [[N1]])
; CHECK-NEXT: [[SEL_V:%.*]] = select i1 [[COND:%.*]], float [[X]], float [[Y:%.*]]
; CHECK-NEXT: [[SEL:%.*]] = fneg float [[SEL_V]]
; CHECK-NEXT: ret float [[SEL]]
;
%n1 = fneg float %x
call void @use(float %n1)
%n2 = fneg float %y
%sel = select i1 %cond, float %n1, float %n2
ret float %sel
}
define float @fneg_fneg_sel_extra_use2(float %x, float %y, i1 %cond) {
; CHECK-LABEL: @fneg_fneg_sel_extra_use2(
; CHECK-NEXT: [[N2:%.*]] = fneg float [[Y:%.*]]
; CHECK-NEXT: call void @use(float [[N2]])
; CHECK-NEXT: [[SEL_V:%.*]] = select i1 [[COND:%.*]], float [[X:%.*]], float [[Y]]
; CHECK-NEXT: [[SEL:%.*]] = fneg float [[SEL_V]]
; CHECK-NEXT: ret float [[SEL]]
;
%n1 = fneg float %x
%n2 = fneg float %y
call void @use(float %n2)
%sel = select i1 %cond, float %n1, float %n2
ret float %sel
}
; Legacy form of fneg should work too.
define float @fsub_fsub_sel_extra_use1(float %x, float %y, i1 %cond) {
; CHECK-LABEL: @fsub_fsub_sel_extra_use1(
; CHECK-NEXT: [[N1:%.*]] = fneg float [[X:%.*]]
; CHECK-NEXT: call void @use(float [[N1]])
; CHECK-NEXT: [[SEL_V:%.*]] = select i1 [[COND:%.*]], float [[X]], float [[Y:%.*]]
; CHECK-NEXT: [[SEL:%.*]] = fneg float [[SEL_V]]
; CHECK-NEXT: ret float [[SEL]]
;
%n1 = fsub float -0.0, %x
call void @use(float %n1)
%n2 = fsub float -0.0, %y
%sel = select i1 %cond, float %n1, float %n2
ret float %sel
}
; Negative test: but 2 extra uses would require an extra instruction.
define float @fneg_fneg_sel_extra_use3(float %x, float %y, i1 %cond) {
; CHECK-LABEL: @fneg_fneg_sel_extra_use3(
; CHECK-NEXT: [[N1:%.*]] = fneg float [[X:%.*]]
; CHECK-NEXT: call void @use(float [[N1]])
; CHECK-NEXT: [[N2:%.*]] = fneg float [[Y:%.*]]
; CHECK-NEXT: call void @use(float [[N2]])
; CHECK-NEXT: [[SEL:%.*]] = select i1 [[COND:%.*]], float [[N1]], float [[N2]]
; CHECK-NEXT: ret float [[SEL]]
;
%n1 = fneg float %x
call void @use(float %n1)
%n2 = fneg float %y
call void @use(float %n2)
%sel = select i1 %cond, float %n1, float %n2
ret float %sel
}
define double @fneg_fneg_sel_fmf1(double %x, double %y, i1 %cond) {
; CHECK-LABEL: @fneg_fneg_sel_fmf1(
; CHECK-NEXT: [[SEL_V:%.*]] = select i1 [[COND:%.*]], double [[X:%.*]], double [[Y:%.*]]
; CHECK-NEXT: [[SEL:%.*]] = fneg double [[SEL_V]]
; CHECK-NEXT: ret double [[SEL]]
;
%n1 = fneg nnan double %x
%n2 = fneg ninf double %y
%sel = select i1 %cond, double %n1, double %n2
ret double %sel
}
define double @fneg_fneg_sel_fmf2(double %x, double %y, i1 %cond) {
; CHECK-LABEL: @fneg_fneg_sel_fmf2(
; CHECK-NEXT: [[SEL_V:%.*]] = select ninf i1 [[COND:%.*]], double [[X:%.*]], double [[Y:%.*]]
; CHECK-NEXT: [[SEL:%.*]] = fneg ninf double [[SEL_V]]
; CHECK-NEXT: ret double [[SEL]]
;
%n1 = fneg nnan ninf double %x
%n2 = fneg ninf double %y
%sel = select i1 %cond, double %n1, double %n2
ret double %sel
}
define double @fneg_fneg_sel_fmf3(double %x, double %y, i1 %cond) {
; CHECK-LABEL: @fneg_fneg_sel_fmf3(
; CHECK-NEXT: [[SEL_V:%.*]] = select ninf i1 [[COND:%.*]], double [[X:%.*]], double [[Y:%.*]]
; CHECK-NEXT: [[SEL:%.*]] = fneg ninf double [[SEL_V]]
; CHECK-NEXT: ret double [[SEL]]
;
%n1 = fneg nnan ninf double %x
%n2 = fneg ninf double %y
%sel = select ninf i1 %cond, double %n1, double %n2
ret double %sel
}
define double @fneg_fneg_sel_fmf4(double %x, double %y, i1 %cond) {
; CHECK-LABEL: @fneg_fneg_sel_fmf4(
; CHECK-NEXT: [[SEL_V:%.*]] = select nnan ninf nsz i1 [[COND:%.*]], double [[X:%.*]], double [[Y:%.*]]
; CHECK-NEXT: [[SEL:%.*]] = fneg nnan ninf nsz double [[SEL_V]]
; CHECK-NEXT: ret double [[SEL]]
;
%n1 = fneg nnan double %x
%n2 = fneg ninf double %y
%sel = select nsz nnan ninf i1 %cond, double %n1, double %n2
ret double %sel
}
; Negative test
define float @fneg_fadd_constant(float %x) {
; CHECK-LABEL: @fneg_fadd_constant(
; CHECK-NEXT: [[A:%.*]] = fadd float [[X:%.*]], 4.200000e+01
; CHECK-NEXT: [[R:%.*]] = fneg float [[A]]
; CHECK-NEXT: ret float [[R]]
;
%a = fadd float %x, 42.0
%r = fneg float %a
ret float %r
}
; Negative test
define float @fake_nsz_fadd_constant(float %x) {
; CHECK-LABEL: @fake_nsz_fadd_constant(
; CHECK-NEXT: [[A:%.*]] = fadd float [[X:%.*]], 4.200000e+01
; CHECK-NEXT: [[R:%.*]] = fneg float [[A]]
; CHECK-NEXT: ret float [[R]]
;
%a = fadd float %x, 42.0
%r = fsub float -0.0, %a
ret float %r
}
; -(X + C) --> -C - X
define float @fneg_nsz_fadd_constant(float %x) {
; CHECK-LABEL: @fneg_nsz_fadd_constant(
; CHECK-NEXT: [[R:%.*]] = fsub nsz float -4.200000e+01, [[X:%.*]]
; CHECK-NEXT: ret float [[R]]
;
%a = fadd float %x, 42.0
%r = fneg nsz float %a
ret float %r
}
; -(X + C) --> -C - X
define float @fake_fneg_nsz_fadd_constant(float %x) {
; CHECK-LABEL: @fake_fneg_nsz_fadd_constant(
; CHECK-NEXT: [[R:%.*]] = fsub fast float -4.200000e+01, [[X:%.*]]
; CHECK-NEXT: ret float [[R]]
;
%a = fadd float %x, 42.0
%r = fsub fast float -0.0, %a
ret float %r
}
; Negative test
define float @fneg_nsz_fadd_constant_extra_use(float %x) {
; CHECK-LABEL: @fneg_nsz_fadd_constant_extra_use(
; CHECK-NEXT: [[A:%.*]] = fadd float [[X:%.*]], 4.200000e+01
; CHECK-NEXT: call void @use(float [[A]])
; CHECK-NEXT: [[R:%.*]] = fneg nsz float [[A]]
; CHECK-NEXT: ret float [[R]]
;
%a = fadd float %x, 42.0
call void @use(float %a)
%r = fneg nsz float %a
ret float %r
}
; Negative test
define float @fake_fneg_nsz_fadd_constant_extra_use(float %x) {
; CHECK-LABEL: @fake_fneg_nsz_fadd_constant_extra_use(
; CHECK-NEXT: [[A:%.*]] = fadd float [[X:%.*]], 4.200000e+01
; CHECK-NEXT: call void @use(float [[A]])
; CHECK-NEXT: [[R:%.*]] = fneg fast float [[A]]
; CHECK-NEXT: ret float [[R]]
;
%a = fadd float %x, 42.0
call void @use(float %a)
%r = fsub fast float -0.0, %a
ret float %r
}
; -(X + C) --> -C - X
define <2 x float> @fneg_nsz_fadd_constant_vec(<2 x float> %x) {
; CHECK-LABEL: @fneg_nsz_fadd_constant_vec(
; CHECK-NEXT: [[R:%.*]] = fsub reassoc nnan nsz <2 x float> <float -4.200000e+01, float -4.300000e+01>, [[X:%.*]]
; CHECK-NEXT: ret <2 x float> [[R]]
;
%a = fadd <2 x float> %x, <float 42.0, float 43.0>
%r = fneg nsz nnan reassoc <2 x float> %a
ret <2 x float> %r
}
; -(X + C) --> -C - X
define <2 x float> @fake_fneg_nsz_fadd_constant_vec(<2 x float> %x) {
; CHECK-LABEL: @fake_fneg_nsz_fadd_constant_vec(
; CHECK-NEXT: [[R:%.*]] = fsub nsz <2 x float> <float -4.200000e+01, float poison>, [[X:%.*]]
; CHECK-NEXT: ret <2 x float> [[R]]
;
%a = fadd <2 x float> %x, <float 42.0, float poison>
%r = fsub nsz <2 x float> <float poison, float -0.0>, %a
ret <2 x float> %r
}
@g = external global i16, align 1
define float @fneg_nsz_fadd_constant_expr(float %x) {
; CHECK-LABEL: @fneg_nsz_fadd_constant_expr(
; CHECK-NEXT: [[A:%.*]] = fadd float [[X:%.*]], bitcast (i32 ptrtoint (ptr @g to i32) to float)
; CHECK-NEXT: [[R:%.*]] = fneg nsz float [[A]]
; CHECK-NEXT: ret float [[R]]
;
%a = fadd float %x, bitcast (i32 ptrtoint (ptr @g to i32) to float)
%r = fneg nsz float %a
ret float %r
}
define float @fake_fneg_nsz_fadd_constant_expr(float %x) {
; CHECK-LABEL: @fake_fneg_nsz_fadd_constant_expr(
; CHECK-NEXT: [[A:%.*]] = fadd float [[X:%.*]], bitcast (i32 ptrtoint (ptr @g to i32) to float)
; CHECK-NEXT: [[R:%.*]] = fneg nsz float [[A]]
; CHECK-NEXT: ret float [[R]]
;
%a = fadd float %x, bitcast (i32 ptrtoint (ptr @g to i32) to float)
%r = fsub nsz float -0.0, %a
ret float %r
}
define float @select_fneg_true(float %x, float %y, i1 %b) {
; CHECK-LABEL: @select_fneg_true(
; CHECK-NEXT: [[Y_NEG:%.*]] = fneg float [[Y:%.*]]
; CHECK-NEXT: [[R:%.*]] = select i1 [[B:%.*]], float [[X:%.*]], float [[Y_NEG]]
; CHECK-NEXT: ret float [[R]]
;
%nx = fneg float %x
%s = select i1 %b, float %nx, float %y
%r = fneg float %s
ret float %r
}
define <2 x float> @select_fneg_false(<2 x float> %x, <2 x float> %y, <2 x i1> %b) {
; CHECK-LABEL: @select_fneg_false(
; CHECK-NEXT: [[X_NEG:%.*]] = fneg nnan nsz <2 x float> [[X:%.*]]
; CHECK-NEXT: [[R:%.*]] = select nnan ninf <2 x i1> [[B:%.*]], <2 x float> [[X_NEG]], <2 x float> [[Y:%.*]]
; CHECK-NEXT: ret <2 x float> [[R]]
;
%ny = fneg nnan <2 x float> %y
%s = select ninf <2 x i1> %b, <2 x float> %x, <2 x float> %ny
%r = fneg nsz nnan <2 x float> %s
ret <2 x float> %r
}
define float @select_fneg_false_no_nsz(float %x, float %y, i1 %b) {
; CHECK-LABEL: @select_fneg_false_no_nsz(
; CHECK-NEXT: [[X_NEG:%.*]] = fneg nnan ninf nsz float [[X:%.*]]
; CHECK-NEXT: [[R:%.*]] = select nnan ninf i1 [[B:%.*]], float [[X_NEG]], float [[Y:%.*]]
; CHECK-NEXT: ret float [[R]]
;
%ny = fneg float %y
%s = select i1 %b, float %x, float %ny
%r = fneg ninf nnan nsz float %s
ret float %r
}
; The removal of nsz in this pattern is not needed if the select condition can't be poison.
define float @select_fneg_false_nsz_ok(float %x, float %y, i1 noundef %b) {
; CHECK-LABEL: @select_fneg_false_nsz_ok(
; CHECK-NEXT: [[X_NEG:%.*]] = fneg nnan ninf nsz float [[X:%.*]]
; CHECK-NEXT: [[R:%.*]] = select nnan ninf nsz i1 [[B:%.*]], float [[X_NEG]], float [[Y:%.*]]
; CHECK-NEXT: ret float [[R]]
;
%ny = fneg float %y
%s = select i1 %b, float %x, float %ny
%r = fneg nsz ninf nnan float %s
ret float %r
}
define float @select_fneg_false_nsz(float %x, float %y, i1 %b) {
; CHECK-LABEL: @select_fneg_false_nsz(
; CHECK-NEXT: [[X_NEG:%.*]] = fneg nnan ninf nsz float [[X:%.*]]
; CHECK-NEXT: [[R:%.*]] = select nnan ninf nsz i1 [[B:%.*]], float [[X_NEG]], float [[Y:%.*]]
; CHECK-NEXT: ret float [[R]]
;
%ny = fneg float %y
%s = select nsz i1 %b, float %x, float %ny
%r = fneg ninf nnan nsz float %s
ret float %r
}
; Special-case for propagating nsz: it's ok when selecting between an operand and its negation.
define float @select_common_op_fneg_true(float %x, i1 %b) {
; CHECK-LABEL: @select_common_op_fneg_true(
; CHECK-NEXT: [[X_NEG:%.*]] = fneg nnan ninf nsz float [[X:%.*]]
; CHECK-NEXT: [[R:%.*]] = select nnan ninf nsz i1 [[B:%.*]], float [[X_NEG]], float [[X]]
; CHECK-NEXT: ret float [[R]]
;
%nx = fneg float %x
%s = select i1 %b, float %x, float %nx
%r = fneg nsz ninf nnan float %s
ret float %r
}
define float @select_common_op_fneg_false(float %x, i1 %b) {
; CHECK-LABEL: @select_common_op_fneg_false(
; CHECK-NEXT: [[X_NEG:%.*]] = fneg nnan ninf nsz float [[X:%.*]]
; CHECK-NEXT: [[R:%.*]] = select nnan ninf nsz i1 [[B:%.*]], float [[X_NEG]], float [[X]]
; CHECK-NEXT: ret float [[R]]
;
%nx = fneg float %x
%s = select i1 %b, float %x, float %nx
%r = fneg nsz ninf nnan float %s
ret float %r
}
; The transform above allows follow-on folds to convert to fabs.
define float @fabs(float %a) {
; CHECK-LABEL: @fabs(
; CHECK-NEXT: [[FNEG1:%.*]] = call nnan ninf nsz float @llvm.fabs.f32(float [[A:%.*]])
; CHECK-NEXT: ret float [[FNEG1]]
;
%fneg = fneg float %a
%cmp = fcmp ogt float %a, %fneg
%sel = select i1 %cmp, float %fneg, float %a
%fneg1 = fneg nnan ninf nsz float %sel
ret float %fneg1
}
define float @fnabs(float %a) {
; CHECK-LABEL: @fnabs(
; CHECK-NEXT: [[TMP1:%.*]] = call fast float @llvm.fabs.f32(float [[A:%.*]])
; CHECK-NEXT: [[FNEG1:%.*]] = fneg fast float [[TMP1]]
; CHECK-NEXT: ret float [[FNEG1]]
;
%fneg = fneg float %a
%cmp = fcmp olt float %a, %fneg
%sel = select i1 %cmp, float %fneg, float %a
%fneg1 = fneg fast float %sel
ret float %fneg1
}
define float @fnabs_1(float %a) {
; CHECK-LABEL: @fnabs_1(
; CHECK-NEXT: [[TMP1:%.*]] = call fast float @llvm.fabs.f32(float [[A:%.*]])
; CHECK-NEXT: [[FNEG1:%.*]] = fneg fast float [[TMP1]]
; CHECK-NEXT: ret float [[FNEG1]]
;
%fneg = fneg float %a
%cmp = fcmp ogt float %a, %fneg
%sel = select i1 %cmp, float %a, float %fneg
%fneg1 = fneg fast float %sel
ret float %fneg1
}
; This is not fabs because that could produce a different signbit for a NAN input.
; PR59279
define float @fnabs_2_nsz(float %a) {
; CHECK-LABEL: @fnabs_2_nsz(
; CHECK-NEXT: [[CMP:%.*]] = fcmp olt float [[A:%.*]], 0.000000e+00
; CHECK-NEXT: [[A_NEG:%.*]] = fneg float [[A]]
; CHECK-NEXT: [[FNEG1:%.*]] = select nsz i1 [[CMP]], float [[A]], float [[A_NEG]]
; CHECK-NEXT: ret float [[FNEG1]]
;
%fneg = fneg float %a
%cmp = fcmp olt float %a, %fneg
%sel = select nsz i1 %cmp, float %fneg, float %a
%fneg1 = fneg float %sel
ret float %fneg1
}
define float @fnabs_2_nsz_nnan(float %a) {
; CHECK-LABEL: @fnabs_2_nsz_nnan(
; CHECK-NEXT: [[SEL:%.*]] = call nnan nsz float @llvm.fabs.f32(float [[A:%.*]])
; CHECK-NEXT: [[FNEG1:%.*]] = fneg float [[SEL]]
; CHECK-NEXT: ret float [[FNEG1]]
;
%fneg = fneg float %a
%cmp = fcmp olt float %a, %fneg
%sel = select nsz nnan i1 %cmp, float %fneg, float %a
%fneg1 = fneg float %sel
ret float %fneg1
}
define float @select_fneg_both(float %x, float %y, i1 %b) {
; CHECK-LABEL: @select_fneg_both(
; CHECK-NEXT: [[S_V:%.*]] = select i1 [[B:%.*]], float [[X:%.*]], float [[Y:%.*]]
; CHECK-NEXT: ret float [[S_V]]
;
%nx = fneg float %x
%ny = fneg float %y
%s = select i1 %b, float %nx, float %ny
%r = fneg float %s
ret float %r
}
define float @select_fneg_use1(float %x, float %y, i1 %b) {
; CHECK-LABEL: @select_fneg_use1(
; CHECK-NEXT: [[NX:%.*]] = fneg ninf float [[X:%.*]]
; CHECK-NEXT: call void @use(float [[NX]])
; CHECK-NEXT: [[Y_NEG:%.*]] = fneg float [[Y:%.*]]
; CHECK-NEXT: [[R:%.*]] = select fast i1 [[B:%.*]], float [[X]], float [[Y_NEG]]
; CHECK-NEXT: ret float [[R]]
;
%nx = fneg ninf float %x
call void @use(float %nx)
%s = select fast i1 %b, float %nx, float %y
%r = fneg float %s
ret float %r
}
define float @select_fneg_use2(float %x, float %y, i1 %b) {
; CHECK-LABEL: @select_fneg_use2(
; CHECK-NEXT: call void @use(float [[Y:%.*]])
; CHECK-NEXT: [[Y_NEG:%.*]] = fneg fast float [[Y]]
; CHECK-NEXT: [[R:%.*]] = select reassoc nnan ninf arcp contract afn i1 [[B:%.*]], float [[X:%.*]], float [[Y_NEG]]
; CHECK-NEXT: ret float [[R]]
;
call void @use(float %y)
%nx = fneg nsz float %x
%s = select ninf i1 %b, float %nx, float %y
%r = fneg fast float %s
ret float %r
}
; Negative test
define float @select_fneg_use3(float %x, float %y, i1 %b) {
; CHECK-LABEL: @select_fneg_use3(
; CHECK-NEXT: [[NX:%.*]] = fneg float [[X:%.*]]
; CHECK-NEXT: [[S:%.*]] = select i1 [[B:%.*]], float [[NX]], float [[Y:%.*]]
; CHECK-NEXT: call void @use(float [[S]])
; CHECK-NEXT: [[R:%.*]] = fneg float [[S]]
; CHECK-NEXT: ret float [[R]]
;
%nx = fneg float %x
%s = select i1 %b, float %nx, float %y
call void @use(float %s)
%r = fneg float %s
ret float %r
}
define float @fneg_ldexp(float %x, i32 %n) {
; CHECK-LABEL: @fneg_ldexp(
; CHECK-NEXT: [[TMP1:%.*]] = fneg float [[X:%.*]]
; CHECK-NEXT: [[NEG:%.*]] = call float @llvm.ldexp.f32.i32(float [[TMP1]], i32 [[N:%.*]])
; CHECK-NEXT: ret float [[NEG]]
;
%ldexp = call float @llvm.ldexp.f32.i32(float %x, i32 %n)
%neg = fneg float %ldexp
ret float %neg
}
define float @fsub_fneg_ldexp(float %x, i32 %n) {
; CHECK-LABEL: @fsub_fneg_ldexp(
; CHECK-NEXT: [[TMP1:%.*]] = fneg float [[X:%.*]]
; CHECK-NEXT: [[NEG:%.*]] = call float @llvm.ldexp.f32.i32(float [[TMP1]], i32 [[N:%.*]])
; CHECK-NEXT: ret float [[NEG]]
;
%ldexp = call float @llvm.ldexp.f32.i32(float %x, i32 %n)
%neg = fsub float -0.0, %ldexp
ret float %neg
}
define float @fsub_fneg_ldexp_nsz(float %x, i32 %n) {
; CHECK-LABEL: @fsub_fneg_ldexp_nsz(
; CHECK-NEXT: [[TMP1:%.*]] = fneg nsz float [[X:%.*]]
; CHECK-NEXT: [[NEG:%.*]] = call nsz float @llvm.ldexp.f32.i32(float [[TMP1]], i32 [[N:%.*]])
; CHECK-NEXT: ret float [[NEG]]
;
%ldexp = call float @llvm.ldexp.f32.i32(float %x, i32 %n)
%neg = fsub nsz float -0.0, %ldexp
ret float %neg
}
define float @fsub_fneg_ldexp_p0_nsz(float %x, i32 %n) {
; CHECK-LABEL: @fsub_fneg_ldexp_p0_nsz(
; CHECK-NEXT: [[TMP1:%.*]] = fneg nsz float [[X:%.*]]
; CHECK-NEXT: [[NEG:%.*]] = call nsz float @llvm.ldexp.f32.i32(float [[TMP1]], i32 [[N:%.*]])
; CHECK-NEXT: ret float [[NEG]]
;
%ldexp = call float @llvm.ldexp.f32.i32(float %x, i32 %n)
%neg = fsub nsz float 0.0, %ldexp
ret float %neg
}
define float @fsub_fneg_ldexp_p0(float %x, i32 %n) {
; CHECK-LABEL: @fsub_fneg_ldexp_p0(
; CHECK-NEXT: [[LDEXP:%.*]] = call float @llvm.ldexp.f32.i32(float [[X:%.*]], i32 [[N:%.*]])
; CHECK-NEXT: [[NEG:%.*]] = fsub float 0.000000e+00, [[LDEXP]]
; CHECK-NEXT: ret float [[NEG]]
;
%ldexp = call float @llvm.ldexp.f32.i32(float %x, i32 %n)
%neg = fsub float 0.0, %ldexp
ret float %neg
}
define <2 x float> @fneg_ldexp_vector(<2 x float> %x, <2 x i32> %n) {
; CHECK-LABEL: @fneg_ldexp_vector(
; CHECK-NEXT: [[TMP1:%.*]] = fneg <2 x float> [[X:%.*]]
; CHECK-NEXT: [[NEG:%.*]] = call <2 x float> @llvm.ldexp.v2f32.v2i32(<2 x float> [[TMP1]], <2 x i32> [[N:%.*]])
; CHECK-NEXT: ret <2 x float> [[NEG]]
;
%ldexp = call <2 x float> @llvm.ldexp.v2f32.v2i32(<2 x float> %x, <2 x i32> %n)
%neg = fneg <2 x float> %ldexp
ret <2 x float> %neg
}
define float @fneg_ldexp_multiuse(float %x, i32 %n, ptr %ptr) {
; CHECK-LABEL: @fneg_ldexp_multiuse(
; CHECK-NEXT: [[LDEXP:%.*]] = call float @llvm.ldexp.f32.i32(float [[X:%.*]], i32 [[N:%.*]])
; CHECK-NEXT: store float [[LDEXP]], ptr [[PTR:%.*]], align 4
; CHECK-NEXT: [[NEG:%.*]] = fneg float [[LDEXP]]
; CHECK-NEXT: ret float [[NEG]]
;
%ldexp = call float @llvm.ldexp.f32.i32(float %x, i32 %n)
store float %ldexp, ptr %ptr
%neg = fneg float %ldexp
ret float %neg
}
define float @fneg_ldexp_fmf_ldexp(float %x, i32 %n) {
; CHECK-LABEL: @fneg_ldexp_fmf_ldexp(
; CHECK-NEXT: [[TMP1:%.*]] = fneg nnan float [[X:%.*]]
; CHECK-NEXT: [[NEG:%.*]] = call nnan float @llvm.ldexp.f32.i32(float [[TMP1]], i32 [[N:%.*]])
; CHECK-NEXT: ret float [[NEG]]
;
%ldexp = call nnan float @llvm.ldexp.f32.i32(float %x, i32 %n)
%neg = fneg float %ldexp
ret float %neg
}
define float @fneg_ldexp_fmf_neg(float %x, i32 %n) {
; CHECK-LABEL: @fneg_ldexp_fmf_neg(
; CHECK-NEXT: [[TMP1:%.*]] = fneg nnan float [[X:%.*]]
; CHECK-NEXT: [[NEG:%.*]] = call nnan float @llvm.ldexp.f32.i32(float [[TMP1]], i32 [[N:%.*]])
; CHECK-NEXT: ret float [[NEG]]
;
%ldexp = call float @llvm.ldexp.f32.i32(float %x, i32 %n)
%neg = fneg nnan float %ldexp
ret float %neg
}
define float @fneg_ldexp_fmf(float %x, i32 %n) {
; CHECK-LABEL: @fneg_ldexp_fmf(
; CHECK-NEXT: [[TMP1:%.*]] = fneg nnan ninf float [[X:%.*]]
; CHECK-NEXT: [[NEG:%.*]] = call nnan ninf float @llvm.ldexp.f32.i32(float [[TMP1]], i32 [[N:%.*]])
; CHECK-NEXT: ret float [[NEG]]
;
%ldexp = call ninf float @llvm.ldexp.f32.i32(float %x, i32 %n)
%neg = fneg nnan float %ldexp
ret float %neg
}
define float @fneg_ldexp_contract0(float %x, i32 %n) {
; CHECK-LABEL: @fneg_ldexp_contract0(
; CHECK-NEXT: [[TMP1:%.*]] = fneg contract float [[X:%.*]]
; CHECK-NEXT: [[NEG:%.*]] = call contract float @llvm.ldexp.f32.i32(float [[TMP1]], i32 [[N:%.*]])
; CHECK-NEXT: ret float [[NEG]]
;
%ldexp = call contract float @llvm.ldexp.f32.i32(float %x, i32 %n)
%neg = fneg float %ldexp
ret float %neg
}
define float @fneg_ldexp_contract1(float %x, i32 %n) {
; CHECK-LABEL: @fneg_ldexp_contract1(
; CHECK-NEXT: [[TMP1:%.*]] = fneg contract float [[X:%.*]]
; CHECK-NEXT: [[NEG:%.*]] = call contract float @llvm.ldexp.f32.i32(float [[TMP1]], i32 [[N:%.*]])
; CHECK-NEXT: ret float [[NEG]]
;
%ldexp = call float @llvm.ldexp.f32.i32(float %x, i32 %n)
%neg = fneg contract float %ldexp
ret float %neg
}
define float @fneg_ldexp_contract(float %x, i32 %n) {
; CHECK-LABEL: @fneg_ldexp_contract(
; CHECK-NEXT: [[TMP1:%.*]] = fneg contract float [[X:%.*]]
; CHECK-NEXT: [[NEG:%.*]] = call contract float @llvm.ldexp.f32.i32(float [[TMP1]], i32 [[N:%.*]])
; CHECK-NEXT: ret float [[NEG]]
;
%ldexp = call contract float @llvm.ldexp.f32.i32(float %x, i32 %n)
%neg = fneg contract float %ldexp
ret float %neg
}
define float @fneg_ldexp_metadata(float %x, i32 %n) {
; CHECK-LABEL: @fneg_ldexp_metadata(
; CHECK-NEXT: [[TMP1:%.*]] = fneg float [[X:%.*]]
; CHECK-NEXT: [[NEG:%.*]] = call float @llvm.ldexp.f32.i32(float [[TMP1]], i32 [[N:%.*]]), !arst [[META0:![0-9]+]]
; CHECK-NEXT: ret float [[NEG]]
;
%ldexp = call float @llvm.ldexp.f32.i32(float %x, i32 %n), !arst !0
%neg = fneg float %ldexp
ret float %neg
}
define float @test_fneg_select_constants(i1 %cond) {
; CHECK-LABEL: @test_fneg_select_constants(
; CHECK-NEXT: [[NEG:%.*]] = select i1 [[COND:%.*]], float -0.000000e+00, float 0.000000e+00
; CHECK-NEXT: ret float [[NEG]]
;
%sel1 = select i1 %cond, float 0.0, float -0.0
%neg = fneg float %sel1
ret float %neg
}
define <2 x float> @test_fneg_vec(<2 x i1> %cond) {
; CHECK-LABEL: @test_fneg_vec(
; CHECK-NEXT: [[NEG:%.*]] = select <2 x i1> [[COND:%.*]], <2 x float> <float -0.000000e+00, float 0.000000e+00>, <2 x float> <float 0.000000e+00, float -0.000000e+00>
; CHECK-NEXT: ret <2 x float> [[NEG]]
;
%sel1 = select <2 x i1> %cond, <2 x float> <float 0.0, float -0.0>, <2 x float> <float -0.0, float 0.0>
%neg = fneg <2 x float> %sel1
ret <2 x float> %neg
}
define float @test_fneg_select_var_constant(i1 %cond, float %x) {
; CHECK-LABEL: @test_fneg_select_var_constant(
; CHECK-NEXT: [[X_NEG:%.*]] = fneg float [[X:%.*]]
; CHECK-NEXT: [[NEG:%.*]] = select i1 [[COND:%.*]], float [[X_NEG]], float 0.000000e+00
; CHECK-NEXT: ret float [[NEG]]
;
%sel1 = select i1 %cond, float %x, float -0.0
%neg = fneg float %sel1
ret float %neg
}
; nsz can be preserved.
define float @test_fneg_select_var_constant_fmf1(i1 %cond, float %x) {
; CHECK-LABEL: @test_fneg_select_var_constant_fmf1(
; CHECK-NEXT: [[X_NEG:%.*]] = fneg float [[X:%.*]]
; CHECK-NEXT: [[NEG:%.*]] = select nnan ninf nsz i1 [[COND:%.*]], float [[X_NEG]], float -1.000000e+00
; CHECK-NEXT: ret float [[NEG]]
;
%sel1 = select nnan ninf nsz i1 %cond, float %x, float 1.0
%neg = fneg float %sel1
ret float %neg
}
define float @test_fneg_select_var_constant_fmf2(i1 %cond, float %x) {
; CHECK-LABEL: @test_fneg_select_var_constant_fmf2(
; CHECK-NEXT: [[X_NEG:%.*]] = fneg nnan ninf nsz float [[X:%.*]]
; CHECK-NEXT: [[NEG:%.*]] = select nnan ninf nsz i1 [[COND:%.*]], float [[X_NEG]], float -1.000000e+00
; CHECK-NEXT: ret float [[NEG]]
;
%sel1 = select i1 %cond, float %x, float 1.0
%neg = fneg nnan ninf nsz float %sel1
ret float %neg
}
define float @test_fneg_select_constant_var(i1 %cond, float %x) {
; CHECK-LABEL: @test_fneg_select_constant_var(
; CHECK-NEXT: [[X_NEG:%.*]] = fneg float [[X:%.*]]
; CHECK-NEXT: [[NEG:%.*]] = select i1 [[COND:%.*]], float -0.000000e+00, float [[X_NEG]]
; CHECK-NEXT: ret float [[NEG]]
;
%sel1 = select i1 %cond, float 0.0, float %x
%neg = fneg float %sel1
ret float %neg
}
; Make sure nabs is generated.
define float @test_fneg_select_abs(i1 %cond, float %x) {
; CHECK-LABEL: @test_fneg_select_abs(
; CHECK-NEXT: [[ABSX:%.*]] = call float @llvm.fabs.f32(float [[X:%.*]])
; CHECK-NEXT: [[ABSX_NEG:%.*]] = fneg float [[ABSX]]
; CHECK-NEXT: [[NEG:%.*]] = select i1 [[COND:%.*]], float -0.000000e+00, float [[ABSX_NEG]]
; CHECK-NEXT: ret float [[NEG]]
;
%absx = call float @llvm.fabs.f32(float %x)
%sel1 = select i1 %cond, float 0.0, float %absx
%neg = fneg float %sel1
ret float %neg
}
define float @test_fneg_fabs_select(i1 %cond, float %x) {
; CHECK-LABEL: @test_fneg_fabs_select(
; CHECK-NEXT: [[TMP1:%.*]] = call float @llvm.fabs.f32(float [[X:%.*]])
; CHECK-NEXT: [[DOTNEG:%.*]] = fneg float [[TMP1]]
; CHECK-NEXT: [[NEG:%.*]] = select i1 [[COND:%.*]], float -0.000000e+00, float [[DOTNEG]]
; CHECK-NEXT: ret float [[NEG]]
;
%sel1 = select i1 %cond, float 0.0, float %x
%abs = call float @llvm.fabs.f32(float %sel1)
%neg = fneg float %abs
ret float %neg
}
define float @test_fneg_select_constant_var_multiuse(i1 %cond, float %x) {
; CHECK-LABEL: @test_fneg_select_constant_var_multiuse(
; CHECK-NEXT: [[SEL1:%.*]] = select i1 [[COND:%.*]], float 0.000000e+00, float [[X:%.*]]
; CHECK-NEXT: call void @use(float [[SEL1]])
; CHECK-NEXT: [[NEG:%.*]] = fneg float [[SEL1]]
; CHECK-NEXT: ret float [[NEG]]
;
%sel1 = select i1 %cond, float 0.0, float %x
call void @use(float %sel1)
%neg = fneg float %sel1
ret float %neg
}
; Don't break fmax idioms.
define float @test_fneg_select_maxnum(float %x) {
; CHECK-LABEL: @test_fneg_select_maxnum(
; CHECK-NEXT: [[SEL1:%.*]] = call nnan nsz float @llvm.maxnum.f32(float [[X:%.*]], float 1.000000e+00)
; CHECK-NEXT: [[NEG:%.*]] = fneg float [[SEL1]]
; CHECK-NEXT: ret float [[NEG]]
;
%cmp1 = fcmp ogt float %x, 1.0
%sel1 = select nnan nsz i1 %cmp1, float %x, float 1.0
%neg = fneg float %sel1
ret float %neg
}
!0 = !{}
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