derek.holloway
7502bf64a4
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76 lines
2.7 KiB
LLVM
76 lines
2.7 KiB
LLVM
; RUN: llc -mtriple=aarch64-- -O0 -fast-isel -fast-isel-abort=4 -verify-machineinstrs < %s | FileCheck %s
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; CHECK-LABEL: cmpxchg_monotonic_32:
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; CHECK: mov [[ADDR:x[0-9]+]], x0
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; CHECK: [[RETRY:.LBB[0-9_]+]]:
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; CHECK-NEXT: ldaxr w0, [[[ADDR]]]
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; CHECK-NEXT: cmp w0, w1
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; CHECK-NEXT: b.ne [[DONE:.LBB[0-9_]+]]
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; CHECK-NEXT: // %bb.2:
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; CHECK-NEXT: stlxr [[STATUS:w[0-9]+]], w2, [[[ADDR]]]
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; CHECK-NEXT: cbnz [[STATUS]], [[RETRY]]
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; CHECK-NEXT: [[DONE]]:
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; CHECK-NEXT: cmp w0, w1
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; CHECK-NEXT: cset [[STATUS]], eq
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; CHECK-NEXT: and [[STATUS32:w[0-9]+]], [[STATUS]], #0x1
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; CHECK-NEXT: str [[STATUS32]], [x3]
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define i32 @cmpxchg_monotonic_32(ptr %p, i32 %cmp, i32 %new, ptr %ps) #0 {
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%tmp0 = cmpxchg ptr %p, i32 %cmp, i32 %new monotonic monotonic
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%tmp1 = extractvalue { i32, i1 } %tmp0, 0
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%tmp2 = extractvalue { i32, i1 } %tmp0, 1
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%tmp3 = zext i1 %tmp2 to i32
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store i32 %tmp3, ptr %ps
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ret i32 %tmp1
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}
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; CHECK-LABEL: cmpxchg_acq_rel_32_load:
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; CHECK: // %bb.0:
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; CHECK: mov [[ADDR:x[0-9]+]], x0
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; CHECK: ldr [[NEW:w[0-9]+]], [x2]
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; CHECK-NEXT: [[RETRY:.LBB[0-9_]+]]:
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; CHECK-NEXT: ldaxr w0, [[[ADDR]]]
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; CHECK-NEXT: cmp w0, w1
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; CHECK-NEXT: b.ne [[DONE:.LBB[0-9_]+]]
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; CHECK-NEXT: // %bb.2:
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; CHECK-NEXT: stlxr [[STATUS:w[0-9]+]], [[NEW]], [[[ADDR]]]
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; CHECK-NEXT: cbnz [[STATUS]], [[RETRY]]
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; CHECK-NEXT: [[DONE]]:
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; CHECK-NEXT: cmp w0, w1
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; CHECK-NEXT: cset [[STATUS]], eq
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; CHECK-NEXT: and [[STATUS32:w[0-9]+]], [[STATUS]], #0x1
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; CHECK-NEXT: str [[STATUS32]], [x3]
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define i32 @cmpxchg_acq_rel_32_load(ptr %p, i32 %cmp, ptr %pnew, ptr %ps) #0 {
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%new = load i32, ptr %pnew
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%tmp0 = cmpxchg ptr %p, i32 %cmp, i32 %new acq_rel acquire
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%tmp1 = extractvalue { i32, i1 } %tmp0, 0
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%tmp2 = extractvalue { i32, i1 } %tmp0, 1
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%tmp3 = zext i1 %tmp2 to i32
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store i32 %tmp3, ptr %ps
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ret i32 %tmp1
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}
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; CHECK-LABEL: cmpxchg_seq_cst_64:
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; CHECK: mov [[ADDR:x[0-9]+]], x0
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; CHECK: [[RETRY:.LBB[0-9_]+]]:
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; CHECK-NEXT: ldaxr x0, [[[ADDR]]]
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; CHECK-NEXT: cmp x0, x1
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; CHECK-NEXT: b.ne [[DONE:.LBB[0-9_]+]]
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; CHECK-NEXT: // %bb.2:
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; CHECK-NEXT: stlxr [[STATUS]], x2, [[[ADDR]]]
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; CHECK-NEXT: cbnz [[STATUS]], [[RETRY]]
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; CHECK-NEXT: [[DONE]]:
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; CHECK-NEXT: cmp x0, x1
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; CHECK-NEXT: cset [[STATUS:w[0-9]+]], eq
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; CHECK-NEXT: and [[STATUS32:w[0-9]+]], [[STATUS]], #0x1
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; CHECK-NEXT: str [[STATUS32]], [x3]
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define i64 @cmpxchg_seq_cst_64(ptr %p, i64 %cmp, i64 %new, ptr %ps) #0 {
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%tmp0 = cmpxchg ptr %p, i64 %cmp, i64 %new seq_cst seq_cst
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%tmp1 = extractvalue { i64, i1 } %tmp0, 0
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%tmp2 = extractvalue { i64, i1 } %tmp0, 1
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%tmp3 = zext i1 %tmp2 to i32
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store i32 %tmp3, ptr %ps
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ret i64 %tmp1
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}
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attributes #0 = { nounwind }
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