1; Test 64-bit unsigned comparisons between memory and a constant.
2;
3; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
4
5; Check ordered comparisons with a constant near the low end of the unsigned
6; 16-bit range.
7define double @f1(double %a, double %b, i64 *%ptr) {
8; CHECK-LABEL: f1:
9; CHECK: clghsi 0(%r2), 2
10; CHECK-NEXT: blr %r14
11; CHECK: ldr %f0, %f2
12; CHECK: br %r14
13  %val = load i64 , i64 *%ptr
14  %cond = icmp ult i64 %val, 2
15  %res = select i1 %cond, double %a, double %b
16  ret double %res
17}
18
19; Check ordered comparisons with the high end of the unsigned 16-bit range.
20define double @f2(double %a, double %b, i64 *%ptr) {
21; CHECK-LABEL: f2:
22; CHECK: clghsi 0(%r2), 65535
23; CHECK-NEXT: blr %r14
24; CHECK: ldr %f0, %f2
25; CHECK: br %r14
26  %val = load i64 , i64 *%ptr
27  %cond = icmp ult i64 %val, 65535
28  %res = select i1 %cond, double %a, double %b
29  ret double %res
30}
31
32; Check the next value up, which can't use CLGHSI.
33define double @f3(double %a, double %b, i64 *%ptr) {
34; CHECK-LABEL: f3:
35; CHECK-NOT: clghsi
36; CHECK: br %r14
37  %val = load i64 , i64 *%ptr
38  %cond = icmp ult i64 %val, 65536
39  %res = select i1 %cond, double %a, double %b
40  ret double %res
41}
42
43; Check equality comparisons with 32768, the lowest value for which
44; we prefer CLGHSI to CGHSI.
45define double @f4(double %a, double %b, i64 *%ptr) {
46; CHECK-LABEL: f4:
47; CHECK: clghsi 0(%r2), 32768
48; CHECK-NEXT: ber %r14
49; CHECK: ldr %f0, %f2
50; CHECK: br %r14
51  %val = load i64 , i64 *%ptr
52  %cond = icmp eq i64 %val, 32768
53  %res = select i1 %cond, double %a, double %b
54  ret double %res
55}
56
57; Check equality comparisons with the high end of the unsigned 16-bit range.
58define double @f5(double %a, double %b, i64 *%ptr) {
59; CHECK-LABEL: f5:
60; CHECK: clghsi 0(%r2), 65535
61; CHECK-NEXT: ber %r14
62; CHECK: ldr %f0, %f2
63; CHECK: br %r14
64  %val = load i64 , i64 *%ptr
65  %cond = icmp eq i64 %val, 65535
66  %res = select i1 %cond, double %a, double %b
67  ret double %res
68}
69
70; Check the next value up, which can't use CLGHSI.
71define double @f6(double %a, double %b, i64 *%ptr) {
72; CHECK-LABEL: f6:
73; CHECK-NOT: clghsi
74; CHECK: br %r14
75  %val = load i64 , i64 *%ptr
76  %cond = icmp eq i64 %val, 65536
77  %res = select i1 %cond, double %a, double %b
78  ret double %res
79}
80
81; Check the high end of the CLGHSI range.
82define double @f7(double %a, double %b, i64 %i1, i64 *%base) {
83; CHECK-LABEL: f7:
84; CHECK: clghsi 4088(%r3), 2
85; CHECK-NEXT: blr %r14
86; CHECK: ldr %f0, %f2
87; CHECK: br %r14
88  %ptr = getelementptr i64, i64 *%base, i64 511
89  %val = load i64 , i64 *%ptr
90  %cond = icmp ult i64 %val, 2
91  %res = select i1 %cond, double %a, double %b
92  ret double %res
93}
94
95; Check the next doubleword up, which needs separate address logic,
96define double @f8(double %a, double %b, i64 *%base) {
97; CHECK-LABEL: f8:
98; CHECK: aghi %r2, 4096
99; CHECK: clghsi 0(%r2), 2
100; CHECK-NEXT: blr %r14
101; CHECK: ldr %f0, %f2
102; CHECK: br %r14
103  %ptr = getelementptr i64, i64 *%base, i64 512
104  %val = load i64 , i64 *%ptr
105  %cond = icmp ult i64 %val, 2
106  %res = select i1 %cond, double %a, double %b
107  ret double %res
108}
109
110; Check negative offsets, which also need separate address logic.
111define double @f9(double %a, double %b, i64 *%base) {
112; CHECK-LABEL: f9:
113; CHECK: aghi %r2, -8
114; CHECK: clghsi 0(%r2), 2
115; CHECK-NEXT: blr %r14
116; CHECK: ldr %f0, %f2
117; CHECK: br %r14
118  %ptr = getelementptr i64, i64 *%base, i64 -1
119  %val = load i64 , i64 *%ptr
120  %cond = icmp ult i64 %val, 2
121  %res = select i1 %cond, double %a, double %b
122  ret double %res
123}
124
125; Check that CLGHSI does not allow indices.
126define double @f10(double %a, double %b, i64 %base, i64 %index) {
127; CHECK-LABEL: f10:
128; CHECK: agr {{%r2, %r3|%r3, %r2}}
129; CHECK: clghsi 0({{%r[23]}}), 2
130; CHECK-NEXT: blr %r14
131; CHECK: ldr %f0, %f2
132; CHECK: br %r14
133  %add = add i64 %base, %index
134  %ptr = inttoptr i64 %add to i64 *
135  %val = load i64 , i64 *%ptr
136  %cond = icmp ult i64 %val, 2
137  %res = select i1 %cond, double %a, double %b
138  ret double %res
139}
140