| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt < %s -instsimplify -S | FileCheck %s |
| |
| ; fsub -0.0, (fsub -0.0, X) ==> X |
| define float @fsub_-0_-0_x(float %a) { |
| ; CHECK-LABEL: @fsub_-0_-0_x( |
| ; CHECK-NEXT: ret float %a |
| ; |
| %t1 = fsub float -0.0, %a |
| %ret = fsub float -0.0, %t1 |
| ret float %ret |
| } |
| |
| ; fsub 0.0, (fsub -0.0, X) != X |
| define float @fsub_0_-0_x(float %a) { |
| ; CHECK-LABEL: @fsub_0_-0_x( |
| ; CHECK-NEXT: [[T1:%.*]] = fsub float 0.000000e+00, %a |
| ; CHECK-NEXT: [[RET:%.*]] = fsub float -0.000000e+00, [[T1]] |
| ; CHECK-NEXT: ret float [[RET]] |
| ; |
| %t1 = fsub float 0.0, %a |
| %ret = fsub float -0.0, %t1 |
| ret float %ret |
| } |
| |
| ; fsub -0.0, (fsub 0.0, X) != X |
| define float @fsub_-0_0_x(float %a) { |
| ; CHECK-LABEL: @fsub_-0_0_x( |
| ; CHECK-NEXT: [[T1:%.*]] = fsub float -0.000000e+00, %a |
| ; CHECK-NEXT: [[RET:%.*]] = fsub float 0.000000e+00, [[T1]] |
| ; CHECK-NEXT: ret float [[RET]] |
| ; |
| %t1 = fsub float -0.0, %a |
| %ret = fsub float 0.0, %t1 |
| ret float %ret |
| } |
| |
| ; fsub X, 0 ==> X |
| define float @fsub_x_0(float %a) { |
| ; CHECK-LABEL: @fsub_x_0( |
| ; CHECK-NEXT: ret float %a |
| ; |
| %ret = fsub float %a, 0.0 |
| ret float %ret |
| } |
| |
| ; fadd X, -0 ==> X |
| define float @fadd_x_n0(float %a) { |
| ; CHECK-LABEL: @fadd_x_n0( |
| ; CHECK-NEXT: ret float %a |
| ; |
| %ret = fadd float %a, -0.0 |
| ret float %ret |
| } |
| |
| ; fmul X, 1.0 ==> X |
| define double @fmul_X_1(double %a) { |
| ; CHECK-LABEL: @fmul_X_1( |
| ; CHECK-NEXT: ret double %a |
| ; |
| %b = fmul double 1.000000e+00, %a |
| ret double %b |
| } |
| |
| ; fdiv X, 1.0 ==> X |
| define float @fdiv_x_1(float %a) { |
| ; CHECK-LABEL: @fdiv_x_1( |
| ; CHECK-NEXT: ret float %a |
| ; |
| %ret = fdiv float %a, 1.0 |
| ret float %ret |
| } |
| |
| ; We can't optimize away the fadd in this test because the input |
| ; value to the function and subsequently to the fadd may be -0.0. |
| ; In that one special case, the result of the fadd should be +0.0 |
| ; rather than the first parameter of the fadd. |
| |
| ; Fragile test warning: We need 6 sqrt calls to trigger the bug |
| ; because the internal logic has a magic recursion limit of 6. |
| ; This is presented without any explanation or ability to customize. |
| |
| declare float @sqrtf(float) |
| |
| define float @PR22688(float %x) { |
| ; CHECK-LABEL: @PR22688( |
| ; CHECK-NEXT: [[TMP1:%.*]] = call float @sqrtf(float %x) |
| ; CHECK-NEXT: [[TMP2:%.*]] = call float @sqrtf(float [[TMP1]]) |
| ; CHECK-NEXT: [[TMP3:%.*]] = call float @sqrtf(float [[TMP2]]) |
| ; CHECK-NEXT: [[TMP4:%.*]] = call float @sqrtf(float [[TMP3]]) |
| ; CHECK-NEXT: [[TMP5:%.*]] = call float @sqrtf(float [[TMP4]]) |
| ; CHECK-NEXT: [[TMP6:%.*]] = call float @sqrtf(float [[TMP5]]) |
| ; CHECK-NEXT: [[TMP7:%.*]] = fadd float [[TMP6]], 0.000000e+00 |
| ; CHECK-NEXT: ret float [[TMP7]] |
| ; |
| %1 = call float @sqrtf(float %x) |
| %2 = call float @sqrtf(float %1) |
| %3 = call float @sqrtf(float %2) |
| %4 = call float @sqrtf(float %3) |
| %5 = call float @sqrtf(float %4) |
| %6 = call float @sqrtf(float %5) |
| %7 = fadd float %6, 0.0 |
| ret float %7 |
| } |
| |
| declare float @llvm.fabs.f32(float) |
| declare float @llvm.sqrt.f32(float) |
| |
| ; CHECK-LABEL: @fabs_select_positive_constants( |
| ; CHECK: %select = select i1 %cmp, float 1.000000e+00, float 2.000000e+00 |
| ; CHECK-NEXT: ret float %select |
| define float @fabs_select_positive_constants(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_variable( |
| ; CHECK: %select = select i1 %cmp, float 1.000000e+00, float %x |
| ; CHECK-NEXT: %fabs = call float @llvm.fabs.f32(float %select) |
| define float @fabs_select_constant_variable(i32 %c, float %x) { |
| %cmp = icmp eq i32 %c, 0 |
| %select = select i1 %cmp, float 1.0, float %x |
| %fabs = call float @llvm.fabs.f32(float %select) |
| ret float %fabs |
| } |
| |
| ; CHECK-LABEL: @fabs_select_neg0_pos0( |
| ; CHECK: %select = select i1 %cmp, float -0.000000e+00, float 0.000000e+00 |
| ; CHECK: %fabs = call float @llvm.fabs.f32(float %select) |
| ; CHECK-NEXT: ret float %fabs |
| define float @fabs_select_neg0_pos0(float addrspace(1)* %out, 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_neg0_neg1( |
| ; CHECK: %select = select i1 %cmp, float -0.000000e+00, float -1.000000e+00 |
| ; CHECK: %fabs = call float @llvm.fabs.f32(float %select) |
| define float @fabs_select_neg0_neg1(float addrspace(1)* %out, i32 %c) { |
| %cmp = icmp eq i32 %c, 0 |
| %select = select i1 %cmp, float -0.0, float -1.0 |
| %fabs = call float @llvm.fabs.f32(float %select) |
| ret float %fabs |
| } |
| |
| ; CHECK-LABEL: @fabs_select_nan_nan( |
| ; CHECK: %select = select i1 %cmp, float 0x7FF8000000000000, float 0x7FF8000100000000 |
| ; CHECK-NEXT: ret float %select |
| define float @fabs_select_nan_nan(float addrspace(1)* %out, i32 %c) { |
| %cmp = icmp eq i32 %c, 0 |
| %select = select i1 %cmp, float 0x7FF8000000000000, float 0x7FF8000100000000 |
| %fabs = call float @llvm.fabs.f32(float %select) |
| ret float %fabs |
| } |
| |
| ; CHECK-LABEL: @fabs_select_negnan_nan( |
| ; CHECK: %select = select i1 %cmp, float 0xFFF8000000000000, float 0x7FF8000000000000 |
| ; CHECK: %fabs = call float @llvm.fabs.f32(float %select) |
| define float @fabs_select_negnan_nan(float addrspace(1)* %out, i32 %c) { |
| %cmp = icmp eq i32 %c, 0 |
| %select = select i1 %cmp, float 0xFFF8000000000000, float 0x7FF8000000000000 |
| %fabs = call float @llvm.fabs.f32(float %select) |
| ret float %fabs |
| } |
| |
| ; CHECK-LABEL: @fabs_select_negnan_negnan( |
| ; CHECK: %select = select i1 %cmp, float 0xFFF8000000000000, float 0x7FF8000100000000 |
| ; CHECK: %fabs = call float @llvm.fabs.f32(float %select) |
| define float @fabs_select_negnan_negnan(float addrspace(1)* %out, i32 %c) { |
| %cmp = icmp eq i32 %c, 0 |
| %select = select i1 %cmp, float 0xFFF8000000000000, float 0x7FF8000100000000 |
| %fabs = call float @llvm.fabs.f32(float %select) |
| ret float %fabs |
| } |
| |
| ; CHECK-LABEL: @fabs_select_negnan_negzero( |
| ; CHECK: %select = select i1 %cmp, float 0xFFF8000000000000, float -0.000000e+00 |
| ; CHECK: %fabs = call float @llvm.fabs.f32(float %select) |
| define float @fabs_select_negnan_negzero(float addrspace(1)* %out, i32 %c) { |
| %cmp = icmp eq i32 %c, 0 |
| %select = select i1 %cmp, float 0xFFF8000000000000, float -0.0 |
| %fabs = call float @llvm.fabs.f32(float %select) |
| ret float %fabs |
| } |
| |
| ; CHECK-LABEL: @fabs_select_negnan_zero( |
| ; CHECK: %select = select i1 %cmp, float 0xFFF8000000000000, float 0.000000e+00 |
| ; CHECK: %fabs = call float @llvm.fabs.f32(float %select) |
| define float @fabs_select_negnan_zero(float addrspace(1)* %out, i32 %c) { |
| %cmp = icmp eq i32 %c, 0 |
| %select = select i1 %cmp, float 0xFFF8000000000000, float 0.0 |
| %fabs = call float @llvm.fabs.f32(float %select) |
| ret float %fabs |
| } |
| |
| ; CHECK-LABEL: @fabs_sqrt |
| ; CHECK: call float @llvm.sqrt.f32 |
| ; CHECK: call float @llvm.fabs.f32 |
| define float @fabs_sqrt(float %a) { |
| ; The fabs can't be eliminated because llvm.sqrt.f32 may return -0 or NaN with |
| ; an arbitrary sign bit. |
| %sqrt = call float @llvm.sqrt.f32(float %a) |
| %fabs = call float @llvm.fabs.f32(float %sqrt) |
| ret float %fabs |
| } |
| |
| ; CHECK-LABEL: @fabs_sqrt_nnan |
| ; CHECK: call nnan float @llvm.sqrt.f32 |
| ; CHECK: call float @llvm.fabs.f32 |
| define float @fabs_sqrt_nnan(float %a) { |
| ; The fabs can't be eliminated because the nnan sqrt may still return -0. |
| %sqrt = call nnan float @llvm.sqrt.f32(float %a) |
| %fabs = call float @llvm.fabs.f32(float %sqrt) |
| ret float %fabs |
| } |
| |
| ; CHECK-LABEL: @fabs_sqrt_nsz |
| ; CHECK: call nsz float @llvm.sqrt.f32 |
| ; CHECK: call float @llvm.fabs.f32 |
| define float @fabs_sqrt_nsz(float %a) { |
| ; The fabs can't be eliminated because the nsz sqrt may still return NaN. |
| %sqrt = call nsz float @llvm.sqrt.f32(float %a) |
| %fabs = call float @llvm.fabs.f32(float %sqrt) |
| ret float %fabs |
| } |
| |
| ; CHECK-LABEL: @fabs_sqrt_nnan_nsz |
| ; CHECK: call nnan nsz float @llvm.sqrt.f32 |
| ; CHECK-NOT: call float @llvm.fabs.f32 |
| define float @fabs_sqrt_nnan_nsz(float %a) { |
| ; The fabs can be eliminated because we're nsz and nnan. |
| %sqrt = call nnan nsz float @llvm.sqrt.f32(float %a) |
| %fabs = call float @llvm.fabs.f32(float %sqrt) |
| ret float %fabs |
| } |
| |
| ; CHECK-LABEL: @fabs_sqrt_nnan_fabs |
| ; CHECK: call float @llvm.fabs.f32 |
| ; CHECK: call nnan float @llvm.sqrt.f32 |
| ; CHECK-NOT: call float @llvm.fabs.f32 |
| define float @fabs_sqrt_nnan_fabs(float %a) { |
| ; The second fabs can be eliminated because the operand to sqrt cannot be -0. |
| %b = call float @llvm.fabs.f32(float %a) |
| %sqrt = call nnan float @llvm.sqrt.f32(float %b) |
| %fabs = call float @llvm.fabs.f32(float %sqrt) |
| ret float %fabs |
| } |