1 ; Test 64-bit compare and swap. 2 ; 3 ; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s 4 5 ; Check CSG without a displacement. 6 define i64 @f1(i64 %cmp, i64 %swap, i64 *%src) { 7 ; CHECK-LABEL: f1: 8 ; CHECK: csg %r2, %r3, 0(%r4) 9 ; CHECK: br %r14 10 %val = cmpxchg i64 *%src, i64 %cmp, i64 %swap seq_cst 11 ret i64 %val 12 } 13 14 ; Check the high end of the aligned CSG range. 15 define i64 @f2(i64 %cmp, i64 %swap, i64 *%src) { 16 ; CHECK-LABEL: f2: 17 ; CHECK: csg %r2, %r3, 524280(%r4) 18 ; CHECK: br %r14 19 %ptr = getelementptr i64 *%src, i64 65535 20 %val = cmpxchg i64 *%ptr, i64 %cmp, i64 %swap seq_cst 21 ret i64 %val 22 } 23 24 ; Check the next doubleword up, which needs separate address logic. 25 ; Other sequences besides this one would be OK. 26 define i64 @f3(i64 %cmp, i64 %swap, i64 *%src) { 27 ; CHECK-LABEL: f3: 28 ; CHECK: agfi %r4, 524288 29 ; CHECK: csg %r2, %r3, 0(%r4) 30 ; CHECK: br %r14 31 %ptr = getelementptr i64 *%src, i64 65536 32 %val = cmpxchg i64 *%ptr, i64 %cmp, i64 %swap seq_cst 33 ret i64 %val 34 } 35 36 ; Check the high end of the negative aligned CSG range. 37 define i64 @f4(i64 %cmp, i64 %swap, i64 *%src) { 38 ; CHECK-LABEL: f4: 39 ; CHECK: csg %r2, %r3, -8(%r4) 40 ; CHECK: br %r14 41 %ptr = getelementptr i64 *%src, i64 -1 42 %val = cmpxchg i64 *%ptr, i64 %cmp, i64 %swap seq_cst 43 ret i64 %val 44 } 45 46 ; Check the low end of the CSG range. 47 define i64 @f5(i64 %cmp, i64 %swap, i64 *%src) { 48 ; CHECK-LABEL: f5: 49 ; CHECK: csg %r2, %r3, -524288(%r4) 50 ; CHECK: br %r14 51 %ptr = getelementptr i64 *%src, i64 -65536 52 %val = cmpxchg i64 *%ptr, i64 %cmp, i64 %swap seq_cst 53 ret i64 %val 54 } 55 56 ; Check the next doubleword down, which needs separate address logic. 57 ; Other sequences besides this one would be OK. 58 define i64 @f6(i64 %cmp, i64 %swap, i64 *%src) { 59 ; CHECK-LABEL: f6: 60 ; CHECK: agfi %r4, -524296 61 ; CHECK: csg %r2, %r3, 0(%r4) 62 ; CHECK: br %r14 63 %ptr = getelementptr i64 *%src, i64 -65537 64 %val = cmpxchg i64 *%ptr, i64 %cmp, i64 %swap seq_cst 65 ret i64 %val 66 } 67 68 ; Check that CSG does not allow an index. 69 define i64 @f7(i64 %cmp, i64 %swap, i64 %src, i64 %index) { 70 ; CHECK-LABEL: f7: 71 ; CHECK: agr %r4, %r5 72 ; CHECK: csg %r2, %r3, 0(%r4) 73 ; CHECK: br %r14 74 %add1 = add i64 %src, %index 75 %ptr = inttoptr i64 %add1 to i64 * 76 %val = cmpxchg i64 *%ptr, i64 %cmp, i64 %swap seq_cst 77 ret i64 %val 78 } 79 80 ; Check that a constant %cmp value is loaded into a register first. 81 define i64 @f8(i64 %dummy, i64 %swap, i64 *%ptr) { 82 ; CHECK-LABEL: f8: 83 ; CHECK: lghi %r2, 1001 84 ; CHECK: csg %r2, %r3, 0(%r4) 85 ; CHECK: br %r14 86 %val = cmpxchg i64 *%ptr, i64 1001, i64 %swap seq_cst 87 ret i64 %val 88 } 89 90 ; Check that a constant %swap value is loaded into a register first. 91 define i64 @f9(i64 %cmp, i64 *%ptr) { 92 ; CHECK-LABEL: f9: 93 ; CHECK: lghi [[SWAP:%r[0-9]+]], 1002 94 ; CHECK: csg %r2, [[SWAP]], 0(%r3) 95 ; CHECK: br %r14 96 %val = cmpxchg i64 *%ptr, i64 %cmp, i64 1002 seq_cst 97 ret i64 %val 98 } 99
