1; RUN: opt -S -instcombine < %s | FileCheck %s
2
3define i1 @test1(float %x, float %y) nounwind {
4  %ext1 = fpext float %x to double
5  %ext2 = fpext float %y to double
6  %cmp = fcmp ogt double %ext1, %ext2
7  ret i1 %cmp
8; CHECK-LABEL: @test1(
9; CHECK-NEXT: fcmp ogt float %x, %y
10}
11
12define i1 @test2(float %a) nounwind {
13  %ext = fpext float %a to double
14  %cmp = fcmp ogt double %ext, 1.000000e+00
15  ret i1 %cmp
16; CHECK-LABEL: @test2(
17; CHECK-NEXT: fcmp ogt float %a, 1.0
18}
19
20define i1 @test3(float %a) nounwind {
21  %ext = fpext float %a to double
22  %cmp = fcmp ogt double %ext, 0x3FF0000000000001 ; more precision than float.
23  ret i1 %cmp
24; CHECK-LABEL: @test3(
25; CHECK-NEXT: fpext float %a to double
26}
27
28define i1 @test4(float %a) nounwind {
29  %ext = fpext float %a to double
30  %cmp = fcmp ogt double %ext, 0x36A0000000000000 ; denormal in float.
31  ret i1 %cmp
32; CHECK-LABEL: @test4(
33; CHECK-NEXT: fpext float %a to double
34}
35
36define i1 @test5(float %a) nounwind {
37  %neg = fsub float -0.000000e+00, %a
38  %cmp = fcmp ogt float %neg, 1.000000e+00
39  ret i1 %cmp
40; CHECK-LABEL: @test5(
41; CHECK-NEXT: fcmp olt float %a, -1.0
42}
43
44define i1 @test6(float %x, float %y) nounwind {
45  %neg1 = fsub float -0.000000e+00, %x
46  %neg2 = fsub float -0.000000e+00, %y
47  %cmp = fcmp olt float %neg1, %neg2
48  ret i1 %cmp
49; CHECK-LABEL: @test6(
50; CHECK-NEXT: fcmp ogt float %x, %y
51}
52
53define i1 @test7(float %x) nounwind readnone ssp noredzone {
54  %ext = fpext float %x to ppc_fp128
55  %cmp = fcmp ogt ppc_fp128 %ext, 0xM00000000000000000000000000000000
56  ret i1 %cmp
57; CHECK-LABEL: @test7(
58; CHECK-NEXT: fcmp ogt float %x, 0.000000e+00
59}
60
61define float @test8(float %x) nounwind readnone optsize ssp {
62  %conv = fpext float %x to double
63  %cmp = fcmp olt double %conv, 0.000000e+00
64  %conv1 = zext i1 %cmp to i32
65  %conv2 = sitofp i32 %conv1 to float
66  ret float %conv2
67; Float comparison to zero shouldn't cast to double.
68; CHECK-LABEL: @test8(
69; CHECK-NEXT: fcmp olt float %x, 0.000000e+00
70}
71
72declare double @fabs(double) nounwind readnone
73
74define i32 @test9(double %a) nounwind {
75  %call = tail call double @fabs(double %a) nounwind
76  %cmp = fcmp olt double %call, 0.000000e+00
77  %conv = zext i1 %cmp to i32
78  ret i32 %conv
79; CHECK-LABEL: @test9(
80; CHECK-NOT: fabs
81; CHECK: ret i32 0
82}
83
84define i32 @test10(double %a) nounwind {
85  %call = tail call double @fabs(double %a) nounwind
86  %cmp = fcmp ole double %call, 0.000000e+00
87  %conv = zext i1 %cmp to i32
88  ret i32 %conv
89; CHECK-LABEL: @test10(
90; CHECK-NOT: fabs
91; CHECK: fcmp oeq double %a, 0.000000e+00
92}
93
94define i32 @test11(double %a) nounwind {
95  %call = tail call double @fabs(double %a) nounwind
96  %cmp = fcmp ogt double %call, 0.000000e+00
97  %conv = zext i1 %cmp to i32
98  ret i32 %conv
99; CHECK-LABEL: @test11(
100; CHECK-NOT: fabs
101; CHECK: fcmp one double %a, 0.000000e+00
102}
103
104define i32 @test12(double %a) nounwind {
105  %call = tail call double @fabs(double %a) nounwind
106  %cmp = fcmp oge double %call, 0.000000e+00
107  %conv = zext i1 %cmp to i32
108  ret i32 %conv
109; CHECK-LABEL: @test12(
110; CHECK-NOT: fabs
111; CHECK: fcmp ord double %a, 0.000000e+00
112}
113
114define i32 @test13(double %a) nounwind {
115  %call = tail call double @fabs(double %a) nounwind
116  %cmp = fcmp une double %call, 0.000000e+00
117  %conv = zext i1 %cmp to i32
118  ret i32 %conv
119; CHECK-LABEL: @test13(
120; CHECK-NOT: fabs
121; CHECK: fcmp une double %a, 0.000000e+00
122}
123
124define i32 @test14(double %a) nounwind {
125  %call = tail call double @fabs(double %a) nounwind
126  %cmp = fcmp oeq double %call, 0.000000e+00
127  %conv = zext i1 %cmp to i32
128  ret i32 %conv
129; CHECK-LABEL: @test14(
130; CHECK-NOT: fabs
131; CHECK: fcmp oeq double %a, 0.000000e+00
132}
133
134define i32 @test15(double %a) nounwind {
135  %call = tail call double @fabs(double %a) nounwind
136  %cmp = fcmp one double %call, 0.000000e+00
137  %conv = zext i1 %cmp to i32
138  ret i32 %conv
139; CHECK-LABEL: @test15(
140; CHECK-NOT: fabs
141; CHECK: fcmp one double %a, 0.000000e+00
142}
143
144define i32 @test16(double %a) nounwind {
145  %call = tail call double @fabs(double %a) nounwind
146  %cmp = fcmp ueq double %call, 0.000000e+00
147  %conv = zext i1 %cmp to i32
148  ret i32 %conv
149; CHECK-LABEL: @test16(
150; CHECK-NOT: fabs
151; CHECK: fcmp ueq double %a, 0.000000e+00
152}
153
154; Don't crash.
155define i32 @test17(double %a, double (double)* %p) nounwind {
156  %call = tail call double %p(double %a) nounwind
157  %cmp = fcmp ueq double %call, 0.000000e+00
158  %conv = zext i1 %cmp to i32
159  ret i32 %conv
160}
161