| ; RUN: opt < %s -instcombine -S | FileCheck %s |
| |
| ; Make sure all library calls are eliminated when the input is known positive. |
| |
| declare float @fabsf(float) |
| declare double @fabs(double) |
| declare fp128 @fabsl(fp128) |
| declare float @llvm.fma.f32(float, float, float) |
| declare float @llvm.fmuladd.f32(float, float, float) |
| |
| define float @square_fabs_call_f32(float %x) { |
| %mul = fmul float %x, %x |
| %fabsf = tail call float @fabsf(float %mul) |
| ret float %fabsf |
| |
| ; CHECK-LABEL: square_fabs_call_f32( |
| ; CHECK-NEXT: %mul = fmul float %x, %x |
| ; CHECK-NEXT: %fabsf = tail call float @fabsf(float %mul) |
| ; CHECK-NEXT: ret float %fabsf |
| } |
| |
| define double @square_fabs_call_f64(double %x) { |
| %mul = fmul double %x, %x |
| %fabs = tail call double @fabs(double %mul) |
| ret double %fabs |
| |
| ; CHECK-LABEL: square_fabs_call_f64( |
| ; CHECK-NEXT: %mul = fmul double %x, %x |
| ; CHECK-NEXT: %fabs = tail call double @fabs(double %mul) |
| ; CHECK-NEXT: ret double %fabs |
| } |
| |
| define fp128 @square_fabs_call_f128(fp128 %x) { |
| %mul = fmul fp128 %x, %x |
| %fabsl = tail call fp128 @fabsl(fp128 %mul) |
| ret fp128 %fabsl |
| |
| ; CHECK-LABEL: square_fabs_call_f128( |
| ; CHECK-NEXT: %mul = fmul fp128 %x, %x |
| ; CHECK-NEXT: %fabsl = tail call fp128 @fabsl(fp128 %mul) |
| ; CHECK-NEXT: ret fp128 %fabsl |
| } |
| |
| ; Make sure all intrinsic calls are eliminated when the input is known |
| ; positive. |
| |
| declare float @llvm.fabs.f32(float) |
| declare double @llvm.fabs.f64(double) |
| declare fp128 @llvm.fabs.f128(fp128) |
| |
| ; The fabs cannot be eliminated because %x may be a NaN |
| define float @square_fabs_intrinsic_f32(float %x) { |
| %mul = fmul float %x, %x |
| %fabsf = tail call float @llvm.fabs.f32(float %mul) |
| ret float %fabsf |
| |
| ; CHECK-LABEL: square_fabs_intrinsic_f32( |
| ; CHECK-NEXT: %mul = fmul float %x, %x |
| ; CHECK-NEXT: %fabsf = tail call float @llvm.fabs.f32(float %mul) |
| ; CHECK-NEXT: ret float %fabsf |
| } |
| |
| define double @square_fabs_intrinsic_f64(double %x) { |
| %mul = fmul double %x, %x |
| %fabs = tail call double @llvm.fabs.f64(double %mul) |
| ret double %fabs |
| |
| ; CHECK-LABEL: square_fabs_intrinsic_f64( |
| ; CHECK-NEXT: %mul = fmul double %x, %x |
| ; CHECK-NEXT: %fabs = tail call double @llvm.fabs.f64(double %mul) |
| ; CHECK-NEXT: ret double %fabs |
| } |
| |
| define fp128 @square_fabs_intrinsic_f128(fp128 %x) { |
| %mul = fmul fp128 %x, %x |
| %fabsl = tail call fp128 @llvm.fabs.f128(fp128 %mul) |
| ret fp128 %fabsl |
| |
| ; CHECK-LABEL: square_fabs_intrinsic_f128( |
| ; CHECK-NEXT: %mul = fmul fp128 %x, %x |
| ; CHECK-NEXT: %fabsl = tail call fp128 @llvm.fabs.f128(fp128 %mul) |
| ; CHECK-NEXT: ret fp128 %fabsl |
| } |
| |
| define float @square_nnan_fabs_intrinsic_f32(float %x) { |
| %mul = fmul nnan float %x, %x |
| %fabsf = call float @llvm.fabs.f32(float %mul) |
| ret float %fabsf |
| |
| ; CHECK-LABEL: square_nnan_fabs_intrinsic_f32( |
| ; CHECK-NEXT: %mul = fmul nnan float %x, %x |
| ; CHECK-NEXT: ret float %mul |
| } |
| |
| ; Shrinking a library call to a smaller type should not be inhibited by nor inhibit the square optimization. |
| |
| define float @square_fabs_shrink_call1(float %x) { |
| %ext = fpext float %x to double |
| %sq = fmul double %ext, %ext |
| %fabs = call double @fabs(double %sq) |
| %trunc = fptrunc double %fabs to float |
| ret float %trunc |
| |
| ; CHECK-LABEL: square_fabs_shrink_call1( |
| ; CHECK-NEXT: %ext = fpext float %x to double |
| ; CHECK-NEXT: %sq = fmul double %ext, %ext |
| ; CHECK-NEXT: call double @fabs(double %sq) |
| ; CHECK-NEXT: %trunc = fptrunc double %fabs to float |
| ; CHECK-NEXT: ret float %trunc |
| } |
| |
| define float @square_fabs_shrink_call2(float %x) { |
| %sq = fmul float %x, %x |
| %ext = fpext float %sq to double |
| %fabs = call double @fabs(double %ext) |
| %trunc = fptrunc double %fabs to float |
| ret float %trunc |
| |
| ; CHECK-LABEL: square_fabs_shrink_call2( |
| ; CHECK-NEXT: %sq = fmul float %x, %x |
| ; CHECK-NEXT: %fabsf = call float @fabsf(float %sq) |
| ; CHECK-NEXT: ret float %fabsf |
| } |
| |
| ; CHECK-LABEL: @fabs_select_constant_negative_positive( |
| ; CHECK: %fabs = select i1 %cmp, float 1.000000e+00, float 2.000000e+00 |
| ; CHECK-NEXT: ret float %fabs |
| define float @fabs_select_constant_negative_positive(i32 %c) { |
| %cmp = icmp eq i32 %c, 0 |
| %select = select i1 %cmp, float -1.0, float 2.0 |
| %fabs = call float @llvm.fabs.f32(float %select) |
| ret float %fabs |
| } |
| |
| ; CHECK-LABEL: @fabs_select_constant_positive_negative( |
| ; CHECK: %fabs = select i1 %cmp, float 1.000000e+00, float 2.000000e+00 |
| ; CHECK-NEXT: ret float %fabs |
| define float @fabs_select_constant_positive_negative(i32 %c) { |
| %cmp = icmp eq i32 %c, 0 |
| %select = select i1 %cmp, float 1.0, float -2.0 |
| %fabs = call float @llvm.fabs.f32(float %select) |
| ret float %fabs |
| } |
| |
| ; CHECK-LABEL: @fabs_select_constant_negative_negative( |
| ; CHECK: %fabs = select i1 %cmp, float 1.000000e+00, float 2.000000e+00 |
| ; CHECK-NEXT: ret float %fabs |
| define float @fabs_select_constant_negative_negative(i32 %c) { |
| %cmp = icmp eq i32 %c, 0 |
| %select = select i1 %cmp, float -1.0, float -2.0 |
| %fabs = call float @llvm.fabs.f32(float %select) |
| ret float %fabs |
| } |
| |
| ; CHECK-LABEL: @fabs_select_constant_neg0( |
| ; CHECK-NEXT: ret float 0.0 |
| define float @fabs_select_constant_neg0(i32 %c) { |
| %cmp = icmp eq i32 %c, 0 |
| %select = select i1 %cmp, float -0.0, float 0.0 |
| %fabs = call float @llvm.fabs.f32(float %select) |
| ret float %fabs |
| } |
| |
| ; CHECK-LABEL: @fabs_select_var_constant_negative( |
| ; CHECK: %select = select i1 %cmp, float %x, float -1.000000e+00 |
| ; CHECK: %fabs = call float @llvm.fabs.f32(float %select) |
| define float @fabs_select_var_constant_negative(i32 %c, float %x) { |
| %cmp = icmp eq i32 %c, 0 |
| %select = select i1 %cmp, float %x, float -1.0 |
| %fabs = call float @llvm.fabs.f32(float %select) |
| ret float %fabs |
| } |
| |
| ; The fabs cannot be eliminated because %x may be a NaN |
| define float @square_fma_fabs_intrinsic_f32(float %x) { |
| %fma = call float @llvm.fma.f32(float %x, float %x, float 1.0) |
| %fabsf = call float @llvm.fabs.f32(float %fma) |
| ret float %fabsf |
| |
| ; CHECK-LABEL: @square_fma_fabs_intrinsic_f32( |
| ; CHECK-NEXT: %fma = call float @llvm.fma.f32(float %x, float %x, float 1.000000e+00) |
| ; CHECK-NEXT: %fabsf = call float @llvm.fabs.f32(float %fma) |
| ; CHECK-NEXT: ret float %fabsf |
| } |
| |
| ; The fabs cannot be eliminated because %x may be a NaN |
| define float @square_nnan_fma_fabs_intrinsic_f32(float %x) { |
| %fma = call nnan float @llvm.fma.f32(float %x, float %x, float 1.0) |
| %fabsf = call float @llvm.fabs.f32(float %fma) |
| ret float %fabsf |
| |
| ; CHECK-LABEL: @square_nnan_fma_fabs_intrinsic_f32( |
| ; CHECK-NEXT: %fma = call nnan float @llvm.fma.f32(float %x, float %x, float 1.000000e+00) |
| ; CHECK-NEXT: ret float %fma |
| } |
| |
| define float @square_fmuladd_fabs_intrinsic_f32(float %x) { |
| %fmuladd = call float @llvm.fmuladd.f32(float %x, float %x, float 1.0) |
| %fabsf = call float @llvm.fabs.f32(float %fmuladd) |
| ret float %fabsf |
| |
| ; CHECK-LABEL: @square_fmuladd_fabs_intrinsic_f32( |
| ; CHECK-NEXT: %fmuladd = call float @llvm.fmuladd.f32(float %x, float %x, float 1.000000e+00) |
| ; CHECK-NEXT: %fabsf = call float @llvm.fabs.f32(float %fmuladd) |
| ; CHECK-NEXT: ret float %fabsf |
| } |
| |
| define float @square_nnan_fmuladd_fabs_intrinsic_f32(float %x) { |
| %fmuladd = call nnan float @llvm.fmuladd.f32(float %x, float %x, float 1.0) |
| %fabsf = call float @llvm.fabs.f32(float %fmuladd) |
| ret float %fabsf |
| |
| ; CHECK-LABEL: @square_nnan_fmuladd_fabs_intrinsic_f32( |
| ; CHECK-NEXT: %fmuladd = call nnan float @llvm.fmuladd.f32(float %x, float %x, float 1.000000e+00) |
| ; CHECK-NEXT: ret float %fmuladd |
| } |