1 ; Test 64-bit atomic exchange.
3 ; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
5 ; Check register exchange.
6 define i64 @f1(i64 %dummy, i64 *%src, i64 %b) {
8 ; CHECK: lg %r2, 0(%r3)
9 ; CHECK: [[LABEL:\.[^:]*]]:
10 ; CHECK: csg %r2, %r4, 0(%r3)
11 ; CHECK: j{{g?}}lh [[LABEL]]
13 %res = atomicrmw xchg i64 *%src, i64 %b seq_cst
17 ; Check the high end of the aligned CSG range.
18 define i64 @f2(i64 %dummy, i64 *%src, i64 %b) {
20 ; CHECK: lg %r2, 524280(%r3)
21 ; CHECK: csg %r2, {{%r[0-9]+}}, 524280(%r3)
23 %ptr = getelementptr i64 *%src, i64 65535
24 %res = atomicrmw xchg i64 *%ptr, i64 %b seq_cst
28 ; Check the next doubleword up, which requires separate address logic.
29 define i64 @f3(i64 %dummy, i64 *%src, i64 %b) {
31 ; CHECK: agfi %r3, 524288
32 ; CHECK: lg %r2, 0(%r3)
33 ; CHECK: csg %r2, {{%r[0-9]+}}, 0(%r3)
35 %ptr = getelementptr i64 *%src, i64 65536
36 %res = atomicrmw xchg i64 *%ptr, i64 %b seq_cst
40 ; Check the low end of the CSG range.
41 define i64 @f4(i64 %dummy, i64 *%src, i64 %b) {
43 ; CHECK: lg %r2, -524288(%r3)
44 ; CHECK: csg %r2, {{%r[0-9]+}}, -524288(%r3)
46 %ptr = getelementptr i64 *%src, i64 -65536
47 %res = atomicrmw xchg i64 *%ptr, i64 %b seq_cst
51 ; Check the next doubleword down, which requires separate address logic.
52 define i64 @f5(i64 %dummy, i64 *%src, i64 %b) {
54 ; CHECK: agfi %r3, -524296
55 ; CHECK: lg %r2, 0(%r3)
56 ; CHECK: csg %r2, {{%r[0-9]+}}, 0(%r3)
58 %ptr = getelementptr i64 *%src, i64 -65537
59 %res = atomicrmw xchg i64 *%ptr, i64 %b seq_cst
63 ; Check that indexed addresses are not allowed.
64 define i64 @f6(i64 %dummy, i64 %base, i64 %index, i64 %b) {
67 ; CHECK: lg %r2, 0(%r3)
68 ; CHECK: csg %r2, {{%r[0-9]+}}, 0(%r3)
70 %add = add i64 %base, %index
71 %ptr = inttoptr i64 %add to i64 *
72 %res = atomicrmw xchg i64 *%ptr, i64 %b seq_cst
76 ; Check exchange of a constant. We should force it into a register and
77 ; use the sequence above.
78 define i64 @f7(i64 %dummy, i64 *%ptr) {
80 ; CHECK: llilf [[VALUE:%r[0-9+]]], 3000000000
81 ; CHECK: lg %r2, 0(%r3)
82 ; CHECK: [[LABEL:\.[^:]*]]:
83 ; CHECK: csg %r2, [[VALUE]], 0(%r3)
84 ; CHECK: j{{g?}}lh [[LABEL]]
86 %res = atomicrmw xchg i64 *%ptr, i64 3000000000 seq_cst