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1; RUN: opt -S -instcombine < %s | FileCheck %s
2
3declare float @llvm.round.f32(float) #0
4declare double @llvm.round.f64(double) #0
5
6; CHECK-LABEL: @constant_fold_round_f32_01
7; CHECK-NEXT: ret float 1.000000e+00
8define float @constant_fold_round_f32_01() #0 {
9  %x = call float @llvm.round.f32(float 1.25) #0
10  ret float %x
11}
12
13; CHECK-LABEL: @constant_fold_round_f32_02
14; CHECK-NEXT: ret float -1.000000e+00
15define float @constant_fold_round_f32_02() #0 {
16  %x = call float @llvm.round.f32(float -1.25) #0
17  ret float %x
18}
19
20; CHECK-LABEL: @constant_fold_round_f32_03
21; CHECK-NEXT: ret float 2.000000e+00
22define float @constant_fold_round_f32_03() #0 {
23  %x = call float @llvm.round.f32(float 1.5) #0
24  ret float %x
25}
26
27; CHECK-LABEL: @constant_fold_round_f32_04
28; CHECK-NEXT: ret float -2.000000e+00
29define float @constant_fold_round_f32_04() #0 {
30  %x = call float @llvm.round.f32(float -1.5) #0
31  ret float %x
32}
33
34; CHECK-LABEL: @constant_fold_round_f32_05
35; CHECK-NEXT: ret float 3.000000e+00
36define float @constant_fold_round_f32_05() #0 {
37  %x = call float @llvm.round.f32(float 2.75) #0
38  ret float %x
39}
40
41; CHECK-LABEL: @constant_fold_round_f32_06
42; CHECK-NEXT: ret float -3.000000e+00
43define float @constant_fold_round_f32_06() #0 {
44  %x = call float @llvm.round.f32(float -2.75) #0
45  ret float %x
46}
47
48; CHECK-LABEL: @constant_fold_round_f64_01
49; CHECK-NEXT: ret double 1.000000e+00
50define double @constant_fold_round_f64_01() #0 {
51  %x = call double @llvm.round.f64(double 1.3) #0
52  ret double %x
53}
54
55; CHECK-LABEL: @constant_fold_round_f64_02
56; CHECK-NEXT: ret double -1.000000e+00
57define double @constant_fold_round_f64_02() #0 {
58  %x = call double @llvm.round.f64(double -1.3) #0
59  ret double %x
60}
61
62; CHECK-LABEL: @constant_fold_round_f64_03
63; CHECK-NEXT: ret double 2.000000e+00
64define double @constant_fold_round_f64_03() #0 {
65  %x = call double @llvm.round.f64(double 1.5) #0
66  ret double %x
67}
68
69; CHECK-LABEL: @constant_fold_round_f64_04
70; CHECK-NEXT: ret double -2.000000e+00
71define double @constant_fold_round_f64_04() #0 {
72  %x = call double @llvm.round.f64(double -1.5) #0
73  ret double %x
74}
75
76; CHECK-LABEL: @constant_fold_round_f64_05
77; CHECK-NEXT: ret double 3.000000e+00
78define double @constant_fold_round_f64_05() #0 {
79  %x = call double @llvm.round.f64(double 2.7) #0
80  ret double %x
81}
82
83; CHECK-LABEL: @constant_fold_round_f64_06
84; CHECK-NEXT: ret double -3.000000e+00
85define double @constant_fold_round_f64_06() #0 {
86  %x = call double @llvm.round.f64(double -2.7) #0
87  ret double %x
88}
89
90attributes #0 = { nounwind readnone }
91