1 ; Test 32-bit signed comparison in which the second operand is sign-extended
2 ; from an i16 memory value.
4 ; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
6 ; Check the low end of the CH range.
7 define void @f1(i32 %lhs, i16 *%src, i32 *%dst) {
9 ; CHECK: ch %r2, 0(%r3)
11 %half = load i16, i16 *%src
12 %rhs = sext i16 %half to i32
13 %cond = icmp slt i32 %lhs, %rhs
14 %res = select i1 %cond, i32 100, i32 200
15 store i32 %res, i32 *%dst
19 ; Check the high end of the aligned CH range.
20 define void @f2(i32 %lhs, i16 *%src, i32 *%dst) {
22 ; CHECK: ch %r2, 4094(%r3)
24 %ptr = getelementptr i16, i16 *%src, i64 2047
25 %half = load i16, i16 *%ptr
26 %rhs = sext i16 %half to i32
27 %cond = icmp slt i32 %lhs, %rhs
28 %res = select i1 %cond, i32 100, i32 200
29 store i32 %res, i32 *%dst
33 ; Check the next halfword up, which should use CHY instead of CH.
34 define void @f3(i32 %lhs, i16 *%src, i32 *%dst) {
36 ; CHECK: chy %r2, 4096(%r3)
38 %ptr = getelementptr i16, i16 *%src, i64 2048
39 %half = load i16, i16 *%ptr
40 %rhs = sext i16 %half to i32
41 %cond = icmp slt i32 %lhs, %rhs
42 %res = select i1 %cond, i32 100, i32 200
43 store i32 %res, i32 *%dst
47 ; Check the high end of the aligned CHY range.
48 define void @f4(i32 %lhs, i16 *%src, i32 *%dst) {
50 ; CHECK: chy %r2, 524286(%r3)
52 %ptr = getelementptr i16, i16 *%src, i64 262143
53 %half = load i16, i16 *%ptr
54 %rhs = sext i16 %half to i32
55 %cond = icmp slt i32 %lhs, %rhs
56 %res = select i1 %cond, i32 100, i32 200
57 store i32 %res, i32 *%dst
61 ; Check the next halfword up, which needs separate address logic.
62 ; Other sequences besides this one would be OK.
63 define void @f5(i32 %lhs, i16 *%src, i32 *%dst) {
65 ; CHECK: agfi %r3, 524288
66 ; CHECK: ch %r2, 0(%r3)
68 %ptr = getelementptr i16, i16 *%src, i64 262144
69 %half = load i16, i16 *%ptr
70 %rhs = sext i16 %half to i32
71 %cond = icmp slt i32 %lhs, %rhs
72 %res = select i1 %cond, i32 100, i32 200
73 store i32 %res, i32 *%dst
77 ; Check the high end of the negative aligned CHY range.
78 define void @f6(i32 %lhs, i16 *%src, i32 *%dst) {
80 ; CHECK: chy %r2, -2(%r3)
82 %ptr = getelementptr i16, i16 *%src, i64 -1
83 %half = load i16, i16 *%ptr
84 %rhs = sext i16 %half to i32
85 %cond = icmp slt i32 %lhs, %rhs
86 %res = select i1 %cond, i32 100, i32 200
87 store i32 %res, i32 *%dst
91 ; Check the low end of the CHY range.
92 define void @f7(i32 %lhs, i16 *%src, i32 *%dst) {
94 ; CHECK: chy %r2, -524288(%r3)
96 %ptr = getelementptr i16, i16 *%src, i64 -262144
97 %half = load i16, i16 *%ptr
98 %rhs = sext i16 %half to i32
99 %cond = icmp slt i32 %lhs, %rhs
100 %res = select i1 %cond, i32 100, i32 200
101 store i32 %res, i32 *%dst
105 ; Check the next halfword down, which needs separate address logic.
106 ; Other sequences besides this one would be OK.
107 define void @f8(i32 %lhs, i16 *%src, i32 *%dst) {
109 ; CHECK: agfi %r3, -524290
110 ; CHECK: ch %r2, 0(%r3)
112 %ptr = getelementptr i16, i16 *%src, i64 -262145
113 %half = load i16, i16 *%ptr
114 %rhs = sext i16 %half to i32
115 %cond = icmp slt i32 %lhs, %rhs
116 %res = select i1 %cond, i32 100, i32 200
117 store i32 %res, i32 *%dst
121 ; Check that CH allows an index.
122 define void @f9(i32 %lhs, i64 %base, i64 %index, i32 *%dst) {
124 ; CHECK: ch %r2, 4094({{%r4,%r3|%r3,%r4}})
126 %add1 = add i64 %base, %index
127 %add2 = add i64 %add1, 4094
128 %ptr = inttoptr i64 %add2 to i16 *
129 %half = load i16, i16 *%ptr
130 %rhs = sext i16 %half to i32
131 %cond = icmp slt i32 %lhs, %rhs
132 %res = select i1 %cond, i32 100, i32 200
133 store i32 %res, i32 *%dst
137 ; Check that CHY allows an index.
138 define void @f10(i32 %lhs, i64 %base, i64 %index, i32 *%dst) {
140 ; CHECK: chy %r2, 4096({{%r4,%r3|%r3,%r4}})
142 %add1 = add i64 %base, %index
143 %add2 = add i64 %add1, 4096
144 %ptr = inttoptr i64 %add2 to i16 *
145 %half = load i16, i16 *%ptr
146 %rhs = sext i16 %half to i32
147 %cond = icmp slt i32 %lhs, %rhs
148 %res = select i1 %cond, i32 100, i32 200
149 store i32 %res, i32 *%dst
153 ; Check the comparison can be reversed if that allows CH to be used.
154 define double @f11(double %a, double %b, i32 %rhs, i16 *%src) {
156 ; CHECK: ch %r2, 0(%r3)
157 ; CHECK-NEXT: bhr %r14
158 ; CHECK: ldr %f0, %f2
160 %half = load i16, i16 *%src
161 %lhs = sext i16 %half to i32
162 %cond = icmp slt i32 %lhs, %rhs
163 %res = select i1 %cond, double %a, double %b