1 ; RUN: opt < %s -instcombine -S | FileCheck %s
3 ; Make sure all library calls are eliminated when the input is known positive.
5 declare float @fabsf(float)
6 declare double @fabs(double)
7 declare fp128 @fabsl(fp128)
9 define float @square_fabs_call_f32(float %x) {
10 %mul = fmul float %x, %x
11 %fabsf = tail call float @fabsf(float %mul)
14 ; CHECK-LABEL: square_fabs_call_f32(
15 ; CHECK-NEXT: %mul = fmul float %x, %x
16 ; CHECK-NEXT: ret float %mul
19 define double @square_fabs_call_f64(double %x) {
20 %mul = fmul double %x, %x
21 %fabs = tail call double @fabs(double %mul)
24 ; CHECK-LABEL: square_fabs_call_f64(
25 ; CHECK-NEXT: %mul = fmul double %x, %x
26 ; CHECK-NEXT: ret double %mul
29 define fp128 @square_fabs_call_f128(fp128 %x) {
30 %mul = fmul fp128 %x, %x
31 %fabsl = tail call fp128 @fabsl(fp128 %mul)
34 ; CHECK-LABEL: square_fabs_call_f128(
35 ; CHECK-NEXT: %mul = fmul fp128 %x, %x
36 ; CHECK-NEXT: ret fp128 %mul
39 ; Make sure all intrinsic calls are eliminated when the input is known positive.
41 declare float @llvm.fabs.f32(float)
42 declare double @llvm.fabs.f64(double)
43 declare fp128 @llvm.fabs.f128(fp128)
45 define float @square_fabs_intrinsic_f32(float %x) {
46 %mul = fmul float %x, %x
47 %fabsf = tail call float @llvm.fabs.f32(float %mul)
50 ; CHECK-LABEL: square_fabs_intrinsic_f32(
51 ; CHECK-NEXT: %mul = fmul float %x, %x
52 ; CHECK-NEXT: ret float %mul
55 define double @square_fabs_intrinsic_f64(double %x) {
56 %mul = fmul double %x, %x
57 %fabs = tail call double @llvm.fabs.f64(double %mul)
60 ; CHECK-LABEL: square_fabs_intrinsic_f64(
61 ; CHECK-NEXT: %mul = fmul double %x, %x
62 ; CHECK-NEXT: ret double %mul
65 define fp128 @square_fabs_intrinsic_f128(fp128 %x) {
66 %mul = fmul fp128 %x, %x
67 %fabsl = tail call fp128 @llvm.fabs.f128(fp128 %mul)
70 ; CHECK-LABEL: square_fabs_intrinsic_f128(
71 ; CHECK-NEXT: %mul = fmul fp128 %x, %x
72 ; CHECK-NEXT: ret fp128 %mul
75 ; Shrinking a library call to a smaller type should not be inhibited by nor inhibit the square optimization.
77 define float @square_fabs_shrink_call1(float %x) {
78 %ext = fpext float %x to double
79 %sq = fmul double %ext, %ext
80 %fabs = call double @fabs(double %sq)
81 %trunc = fptrunc double %fabs to float
84 ; CHECK-LABEL: square_fabs_shrink_call1(
85 ; CHECK-NEXT: %trunc = fmul float %x, %x
86 ; CHECK-NEXT: ret float %trunc
89 define float @square_fabs_shrink_call2(float %x) {
90 %sq = fmul float %x, %x
91 %ext = fpext float %sq to double
92 %fabs = call double @fabs(double %ext)
93 %trunc = fptrunc double %fabs to float
96 ; CHECK-LABEL: square_fabs_shrink_call2(
97 ; CHECK-NEXT: %sq = fmul float %x, %x
98 ; CHECK-NEXT: ret float %sq