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 %pairval = cmpxchg i64 *%src, i64 %cmp, i64 %swap seq_cst seq_cst 11 %val = extractvalue { i64, i1 } %pairval, 0 12 ret i64 %val 13 } 14 15 ; Check the high end of the aligned CSG range. 16 define i64 @f2(i64 %cmp, i64 %swap, i64 *%src) { 17 ; CHECK-LABEL: f2: 18 ; CHECK: csg %r2, %r3, 524280(%r4) 19 ; CHECK: br %r14 20 %ptr = getelementptr i64, i64 *%src, i64 65535 21 %pairval = cmpxchg i64 *%ptr, i64 %cmp, i64 %swap seq_cst seq_cst 22 %val = extractvalue { i64, i1 } %pairval, 0 23 ret i64 %val 24 } 25 26 ; Check the next doubleword up, which needs separate address logic. 27 ; Other sequences besides this one would be OK. 28 define i64 @f3(i64 %cmp, i64 %swap, i64 *%src) { 29 ; CHECK-LABEL: f3: 30 ; CHECK: agfi %r4, 524288 31 ; CHECK: csg %r2, %r3, 0(%r4) 32 ; CHECK: br %r14 33 %ptr = getelementptr i64, i64 *%src, i64 65536 34 %pairval = cmpxchg i64 *%ptr, i64 %cmp, i64 %swap seq_cst seq_cst 35 %val = extractvalue { i64, i1 } %pairval, 0 36 ret i64 %val 37 } 38 39 ; Check the high end of the negative aligned CSG range. 40 define i64 @f4(i64 %cmp, i64 %swap, i64 *%src) { 41 ; CHECK-LABEL: f4: 42 ; CHECK: csg %r2, %r3, -8(%r4) 43 ; CHECK: br %r14 44 %ptr = getelementptr i64, i64 *%src, i64 -1 45 %pairval = cmpxchg i64 *%ptr, i64 %cmp, i64 %swap seq_cst seq_cst 46 %val = extractvalue { i64, i1 } %pairval, 0 47 ret i64 %val 48 } 49 50 ; Check the low end of the CSG range. 51 define i64 @f5(i64 %cmp, i64 %swap, i64 *%src) { 52 ; CHECK-LABEL: f5: 53 ; CHECK: csg %r2, %r3, -524288(%r4) 54 ; CHECK: br %r14 55 %ptr = getelementptr i64, i64 *%src, i64 -65536 56 %pairval = cmpxchg i64 *%ptr, i64 %cmp, i64 %swap seq_cst seq_cst 57 %val = extractvalue { i64, i1 } %pairval, 0 58 ret i64 %val 59 } 60 61 ; Check the next doubleword down, which needs separate address logic. 62 ; Other sequences besides this one would be OK. 63 define i64 @f6(i64 %cmp, i64 %swap, i64 *%src) { 64 ; CHECK-LABEL: f6: 65 ; CHECK: agfi %r4, -524296 66 ; CHECK: csg %r2, %r3, 0(%r4) 67 ; CHECK: br %r14 68 %ptr = getelementptr i64, i64 *%src, i64 -65537 69 %pairval = cmpxchg i64 *%ptr, i64 %cmp, i64 %swap seq_cst seq_cst 70 %val = extractvalue { i64, i1 } %pairval, 0 71 ret i64 %val 72 } 73 74 ; Check that CSG does not allow an index. 75 define i64 @f7(i64 %cmp, i64 %swap, i64 %src, i64 %index) { 76 ; CHECK-LABEL: f7: 77 ; CHECK: agr %r4, %r5 78 ; CHECK: csg %r2, %r3, 0(%r4) 79 ; CHECK: br %r14 80 %add1 = add i64 %src, %index 81 %ptr = inttoptr i64 %add1 to i64 * 82 %pairval = cmpxchg i64 *%ptr, i64 %cmp, i64 %swap seq_cst seq_cst 83 %val = extractvalue { i64, i1 } %pairval, 0 84 ret i64 %val 85 } 86 87 ; Check that a constant %cmp value is loaded into a register first. 88 define i64 @f8(i64 %dummy, i64 %swap, i64 *%ptr) { 89 ; CHECK-LABEL: f8: 90 ; CHECK: lghi %r2, 1001 91 ; CHECK: csg %r2, %r3, 0(%r4) 92 ; CHECK: br %r14 93 %pairval = cmpxchg i64 *%ptr, i64 1001, i64 %swap seq_cst seq_cst 94 %val = extractvalue { i64, i1 } %pairval, 0 95 ret i64 %val 96 } 97 98 ; Check that a constant %swap value is loaded into a register first. 99 define i64 @f9(i64 %cmp, i64 *%ptr) { 100 ; CHECK-LABEL: f9: 101 ; CHECK: lghi [[SWAP:%r[0-9]+]], 1002 102 ; CHECK: csg %r2, [[SWAP]], 0(%r3) 103 ; CHECK: br %r14 104 %pairval = cmpxchg i64 *%ptr, i64 %cmp, i64 1002 seq_cst seq_cst 105 %val = extractvalue { i64, i1 } %pairval, 0 106 ret i64 %val 107 } 108
