| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt < %s -instcombine -S | FileCheck %s |
| |
| 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, undef) 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 undef> |
| ; CHECK-NEXT: ret <4 x double> [[R]] |
| ; |
| %m = fmul <4 x double> %x, <double 42.0, double 0x7FF8000000000000, double 0x7FF0000000000000, double undef> |
| %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 undef> |
| ; CHECK-NEXT: ret <4 x double> [[R]] |
| ; |
| %m = fmul <4 x double> %x, <double 42.0, double 0x7FF8000000000000, double 0x7FF0000000000000, double undef> |
| %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, undef) 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 undef> |
| ; CHECK-NEXT: ret <4 x double> [[R]] |
| ; |
| %d = fdiv <4 x double> %x, <double -42.0, double 0xFFF800000ABCD000, double 0xFFF0000000000000, double undef> |
| %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 undef> |
| ; CHECK-NEXT: ret <4 x double> [[R]] |
| ; |
| %d = fdiv <4 x double> %x, <double -42.0, double 0xFFF800000ABCD000, double 0xFFF0000000000000, double undef> |
| %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_fsub_fmf(float %x) { |
| ; CHECK-LABEL: @fdiv_op0_constant_fsub_fmf( |
| ; CHECK-NEXT: [[R:%.*]] = fdiv fast float -4.200000e+01, [[X:%.*]] |
| ; CHECK-NEXT: ret float [[R]] |
| ; |
| %d = fdiv float 42.0, %x |
| %r = fsub fast float -0.0, %d |
| ret float %r |
| } |
| |
| define float @fdiv_op0_constant_fneg_fmf(float %x) { |
| ; CHECK-LABEL: @fdiv_op0_constant_fneg_fmf( |
| ; CHECK-NEXT: [[R:%.*]] = fdiv fast float -4.200000e+01, [[X:%.*]] |
| ; CHECK-NEXT: ret float [[R]] |
| ; |
| %d = fdiv float 42.0, %x |
| %r = fneg fast 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, undef) 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 undef>, [[X:%.*]] |
| ; CHECK-NEXT: ret <4 x double> [[R]] |
| ; |
| %d = fdiv <4 x double> <double -42.0, double 0x7FF8000000000000, double 0xFFF0000000000000, double undef>, %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 undef>, [[X:%.*]] |
| ; CHECK-NEXT: ret <4 x double> [[R]] |
| ; |
| %d = fdiv <4 x double> <double -42.0, double 0x7FF8000000000000, double 0xFFF0000000000000, double undef>, %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 |
| } |
| |
| ; 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 undef>, [[X:%.*]] |
| ; CHECK-NEXT: ret <2 x float> [[R]] |
| ; |
| %a = fadd <2 x float> %x, <float 42.0, float undef> |
| %r = fsub nsz <2 x float> <float undef, 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: [[R:%.*]] = fsub nsz float fneg (float bitcast (i32 ptrtoint (i16* @g to i32) to float)), [[X:%.*]] |
| ; CHECK-NEXT: ret float [[R]] |
| ; |
| %a = fadd float %x, bitcast (i32 ptrtoint (i16* @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: [[R:%.*]] = fsub nsz float fneg (float bitcast (i32 ptrtoint (i16* @g to i32) to float)), [[X:%.*]] |
| ; CHECK-NEXT: ret float [[R]] |
| ; |
| %a = fadd float %x, bitcast (i32 ptrtoint (i16* @g to i32) to float) |
| %r = fsub nsz float -0.0, %a |
| ret float %r |
| } |