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1; Check that unaligned accesses are allowed in general.  We check the
2; few exceptions (like CRL) in their respective test files.
3;
4; FIXME: -combiner-alias-analysis (the default for SystemZ) stops
5;        f1 from being optimized.
6; RUN: llc < %s -mtriple=s390x-linux-gnu -combiner-alias-analysis=false \
7; RUN:   | FileCheck %s
8
9; Check that these four byte stores become a single word store.
10define void @f1(i8 *%ptr) {
11; CHECK: f1
12; CHECK: iilf [[REG:%r[0-5]]], 66051
13; CHECK: st [[REG]], 0(%r2)
14; CHECK: br %r14
15  %off1 = getelementptr i8, i8 *%ptr, i64 1
16  %off2 = getelementptr i8, i8 *%ptr, i64 2
17  %off3 = getelementptr i8, i8 *%ptr, i64 3
18  store i8 0, i8 *%ptr
19  store i8 1, i8 *%off1
20  store i8 2, i8 *%off2
21  store i8 3, i8 *%off3
22  ret void
23}
24
25; Check that unaligned 2-byte accesses are allowed.
26define i16 @f2(i16 *%src, i16 *%dst) {
27; CHECK-LABEL: f2:
28; CHECK: lh %r2, 0(%r2)
29; CHECK: sth %r2, 0(%r3)
30; CHECK: br %r14
31  %val = load i16 , i16 *%src, align 1
32  store i16 %val, i16 *%dst, align 1
33  ret i16 %val
34}
35
36; Check that unaligned 4-byte accesses are allowed.
37define i32 @f3(i32 *%src1, i32 *%src2, i32 *%dst) {
38; CHECK-LABEL: f3:
39; CHECK: l %r2, 0(%r2)
40; CHECK: s %r2, 0(%r3)
41; CHECK: st %r2, 0(%r4)
42; CHECK: br %r14
43  %val1 = load i32 , i32 *%src1, align 1
44  %val2 = load i32 , i32 *%src2, align 2
45  %sub = sub i32 %val1, %val2
46  store i32 %sub, i32 *%dst, align 1
47  ret i32 %sub
48}
49
50; Check that unaligned 8-byte accesses are allowed.
51define i64 @f4(i64 *%src1, i64 *%src2, i64 *%dst) {
52; CHECK-LABEL: f4:
53; CHECK: lg %r2, 0(%r2)
54; CHECK: sg %r2, 0(%r3)
55; CHECK: stg %r2, 0(%r4)
56; CHECK: br %r14
57  %val1 = load i64 , i64 *%src1, align 1
58  %val2 = load i64 , i64 *%src2, align 2
59  %sub = sub i64 %val1, %val2
60  store i64 %sub, i64 *%dst, align 4
61  ret i64 %sub
62}
63