1 ; RUN: llc -mtriple=aarch64-- -O0 -fast-isel -fast-isel-abort=4 -verify-machineinstrs < %s | FileCheck %s 2 3 ; CHECK-LABEL: cmpxchg_monotonic_32: 4 ; CHECK: [[RETRY:.LBB[0-9_]+]]: 5 ; CHECK-NEXT: mov [[STATUS:w[0-9]+]], #0 6 ; CHECK-NEXT: ldaxr [[OLD:w[0-9]+]], [x0] 7 ; CHECK-NEXT: cmp [[OLD]], w1 8 ; CHECK-NEXT: b.ne [[DONE:.LBB[0-9_]+]] 9 ; CHECK-NEXT: // %bb.2: 10 ; CHECK-NEXT: stlxr [[STATUS]], w2, [x0] 11 ; CHECK-NEXT: cbnz [[STATUS]], [[RETRY]] 12 ; CHECK-NEXT: [[DONE]]: 13 ; CHECK-NEXT: cmp [[OLD]], w1 14 ; CHECK-NEXT: cset [[STATUS:w[0-9]+]], eq 15 ; CHECK-NEXT: and [[STATUS32:w[0-9]+]], [[STATUS]], #0x1 16 ; CHECK-NEXT: str [[STATUS32]], [x3] 17 ; CHECK-NEXT: mov w0, [[OLD]] 18 define i32 @cmpxchg_monotonic_32(i32* %p, i32 %cmp, i32 %new, i32* %ps) #0 { 19 %tmp0 = cmpxchg i32* %p, i32 %cmp, i32 %new monotonic monotonic 20 %tmp1 = extractvalue { i32, i1 } %tmp0, 0 21 %tmp2 = extractvalue { i32, i1 } %tmp0, 1 22 %tmp3 = zext i1 %tmp2 to i32 23 store i32 %tmp3, i32* %ps 24 ret i32 %tmp1 25 } 26 27 ; CHECK-LABEL: cmpxchg_acq_rel_32_load: 28 ; CHECK: // %bb.0: 29 ; CHECK: ldr [[NEW:w[0-9]+]], [x2] 30 ; CHECK-NEXT: [[RETRY:.LBB[0-9_]+]]: 31 ; CHECK-NEXT: mov [[STATUS:w[0-9]+]], #0 32 ; CHECK-NEXT: ldaxr [[OLD:w[0-9]+]], [x0] 33 ; CHECK-NEXT: cmp [[OLD]], w1 34 ; CHECK-NEXT: b.ne [[DONE:.LBB[0-9_]+]] 35 ; CHECK-NEXT: // %bb.2: 36 ; CHECK-NEXT: stlxr [[STATUS]], [[NEW]], [x0] 37 ; CHECK-NEXT: cbnz [[STATUS]], [[RETRY]] 38 ; CHECK-NEXT: [[DONE]]: 39 ; CHECK-NEXT: cmp [[OLD]], w1 40 ; CHECK-NEXT: cset [[STATUS:w[0-9]+]], eq 41 ; CHECK-NEXT: and [[STATUS32:w[0-9]+]], [[STATUS]], #0x1 42 ; CHECK-NEXT: str [[STATUS32]], [x3] 43 ; CHECK-NEXT: mov w0, [[OLD]] 44 define i32 @cmpxchg_acq_rel_32_load(i32* %p, i32 %cmp, i32* %pnew, i32* %ps) #0 { 45 %new = load i32, i32* %pnew 46 %tmp0 = cmpxchg i32* %p, i32 %cmp, i32 %new acq_rel acquire 47 %tmp1 = extractvalue { i32, i1 } %tmp0, 0 48 %tmp2 = extractvalue { i32, i1 } %tmp0, 1 49 %tmp3 = zext i1 %tmp2 to i32 50 store i32 %tmp3, i32* %ps 51 ret i32 %tmp1 52 } 53 54 ; CHECK-LABEL: cmpxchg_seq_cst_64: 55 ; CHECK: [[RETRY:.LBB[0-9_]+]]: 56 ; CHECK-NEXT: mov [[STATUS:w[0-9]+]], #0 57 ; CHECK-NEXT: ldaxr [[OLD:x[0-9]+]], [x0] 58 ; CHECK-NEXT: cmp [[OLD]], x1 59 ; CHECK-NEXT: b.ne [[DONE:.LBB[0-9_]+]] 60 ; CHECK-NEXT: // %bb.2: 61 ; CHECK-NEXT: stlxr [[STATUS]], x2, [x0] 62 ; CHECK-NEXT: cbnz [[STATUS]], [[RETRY]] 63 ; CHECK-NEXT: [[DONE]]: 64 ; CHECK-NEXT: cmp [[OLD]], x1 65 ; CHECK-NEXT: cset [[STATUS:w[0-9]+]], eq 66 ; CHECK-NEXT: and [[STATUS32:w[0-9]+]], [[STATUS]], #0x1 67 ; CHECK-NEXT: str [[STATUS32]], [x3] 68 ; CHECK-NEXT: mov x0, [[OLD]] 69 define i64 @cmpxchg_seq_cst_64(i64* %p, i64 %cmp, i64 %new, i32* %ps) #0 { 70 %tmp0 = cmpxchg i64* %p, i64 %cmp, i64 %new seq_cst seq_cst 71 %tmp1 = extractvalue { i64, i1 } %tmp0, 0 72 %tmp2 = extractvalue { i64, i1 } %tmp0, 1 73 %tmp3 = zext i1 %tmp2 to i32 74 store i32 %tmp3, i32* %ps 75 ret i64 %tmp1 76 } 77 78 attributes #0 = { nounwind } 79
