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e8bff14c32
transferSuccessors() would LoadCmpBB a successor of DoneBB, whereas it should be a successor of the original MBB. Follow-up to r266339. Unfortunately, it's tricky to catch this in the verifier. llvm-svn: 267779
76 lines
2.8 KiB
LLVM
76 lines
2.8 KiB
LLVM
; RUN: llc -verify-machineinstrs -mtriple=aarch64-linux-gnu -O0 %s -o - | FileCheck %s
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define { i8, i1 } @test_cmpxchg_8(i8* %addr, i8 %desired, i8 %new) nounwind {
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; CHECK-LABEL: test_cmpxchg_8:
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; CHECK: [[RETRY:.LBB[0-9]+_[0-9]+]]:
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; CHECK: ldaxrb [[OLD:w[0-9]+]], [x0]
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; CHECK: cmp [[OLD]], w1, uxtb
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; CHECK: b.ne [[DONE:.LBB[0-9]+_[0-9]+]]
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; CHECK: stlxrb [[STATUS:w[3-9]]], w2, [x0]
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; CHECK: cbnz [[STATUS]], [[RETRY]]
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; CHECK: [[DONE]]:
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; CHECK: subs {{w[0-9]+}}, [[OLD]], w1
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; CHECK: cset {{w[0-9]+}}, eq
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%res = cmpxchg i8* %addr, i8 %desired, i8 %new seq_cst monotonic
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ret { i8, i1 } %res
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}
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define { i16, i1 } @test_cmpxchg_16(i16* %addr, i16 %desired, i16 %new) nounwind {
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; CHECK-LABEL: test_cmpxchg_16:
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; CHECK: [[RETRY:.LBB[0-9]+_[0-9]+]]:
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; CHECK: ldaxrh [[OLD:w[0-9]+]], [x0]
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; CHECK: cmp [[OLD]], w1, uxth
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; CHECK: b.ne [[DONE:.LBB[0-9]+_[0-9]+]]
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; CHECK: stlxrh [[STATUS:w[3-9]]], w2, [x0]
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; CHECK: cbnz [[STATUS]], [[RETRY]]
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; CHECK: [[DONE]]:
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; CHECK: subs {{w[0-9]+}}, [[OLD]], w1
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; CHECK: cset {{w[0-9]+}}, eq
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%res = cmpxchg i16* %addr, i16 %desired, i16 %new seq_cst monotonic
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ret { i16, i1 } %res
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}
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define { i32, i1 } @test_cmpxchg_32(i32* %addr, i32 %desired, i32 %new) nounwind {
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; CHECK-LABEL: test_cmpxchg_32:
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; CHECK: [[RETRY:.LBB[0-9]+_[0-9]+]]:
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; CHECK: ldaxr [[OLD:w[0-9]+]], [x0]
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; CHECK: cmp [[OLD]], w1
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; CHECK: b.ne [[DONE:.LBB[0-9]+_[0-9]+]]
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; CHECK: stlxr [[STATUS:w[3-9]]], w2, [x0]
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; CHECK: cbnz [[STATUS]], [[RETRY]]
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; CHECK: [[DONE]]:
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; CHECK: subs {{w[0-9]+}}, [[OLD]], w1
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; CHECK: cset {{w[0-9]+}}, eq
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%res = cmpxchg i32* %addr, i32 %desired, i32 %new seq_cst monotonic
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ret { i32, i1 } %res
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}
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define { i64, i1 } @test_cmpxchg_64(i64* %addr, i64 %desired, i64 %new) nounwind {
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; CHECK-LABEL: test_cmpxchg_64:
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; CHECK: [[RETRY:.LBB[0-9]+_[0-9]+]]:
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; CHECK: ldaxr [[OLD:x[0-9]+]], [x0]
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; CHECK: cmp [[OLD]], x1
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; CHECK: b.ne [[DONE:.LBB[0-9]+_[0-9]+]]
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; CHECK: stlxr [[STATUS:w[3-9]]], x2, [x0]
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; CHECK: cbnz [[STATUS]], [[RETRY]]
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; CHECK: [[DONE]]:
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; CHECK: subs {{x[0-9]+}}, [[OLD]], x1
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; CHECK: cset {{w[0-9]+}}, eq
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%res = cmpxchg i64* %addr, i64 %desired, i64 %new seq_cst monotonic
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ret { i64, i1 } %res
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}
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define { i128, i1 } @test_cmpxchg_128(i128* %addr, i128 %desired, i128 %new) nounwind {
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; CHECK-LABEL: test_cmpxchg_128:
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; CHECK: [[RETRY:.LBB[0-9]+_[0-9]+]]:
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; CHECK: ldaxp [[OLD_LO:x[0-9]+]], [[OLD_HI:x[0-9]+]], [x0]
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; CHECK: cmp [[OLD_LO]], x2
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; CHECK: sbcs xzr, [[OLD_HI]], x3
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; CHECK: b.ne [[DONE:.LBB[0-9]+_[0-9]+]]
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; CHECK: stlxp [[STATUS:w[0-9]+]], x4, x5, [x0]
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; CHECK: cbnz [[STATUS]], [[RETRY]]
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; CHECK: [[DONE]]:
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%res = cmpxchg i128* %addr, i128 %desired, i128 %new seq_cst monotonic
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ret { i128, i1 } %res
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}
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