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; RUN: llc -mtriple=aarch64-apple-ios7.0 -o - %s | FileCheck %s
define i32 @test_return(i32* %p, i32 %oldval, i32 %newval) {
; CHECK-LABEL: test_return:
; CHECK: [[LOOP:LBB[0-9]+_[0-9]+]]:
; CHECK: ldaxr [[LOADED:w[0-9]+]], [x0]
; CHECK: cmp [[LOADED]], w1
; CHECK: b.ne [[FAILED:LBB[0-9]+_[0-9]+]]
; CHECK: stlxr [[STATUS:w[0-9]+]], {{w[0-9]+}}, [x0]
; CHECK: cbnz [[STATUS]], [[LOOP]]
; CHECK-NOT: cmp {{w[0-9]+}}, {{w[0-9]+}}
; CHECK: orr w0, wzr, #0x1
; CHECK: ret
; CHECK: [[FAILED]]:
; CHECK-NOT: cmp {{w[0-9]+}}, {{w[0-9]+}}
; CHECK: mov w0, wzr
; CHECK: ret
%pair = cmpxchg i32* %p, i32 %oldval, i32 %newval seq_cst seq_cst
%success = extractvalue { i32, i1 } %pair, 1
%conv = zext i1 %success to i32
ret i32 %conv
}
define i1 @test_return_bool(i8* %value, i8 %oldValue, i8 %newValue) {
; CHECK-LABEL: test_return_bool:
; CHECK: [[LOOP:LBB[0-9]+_[0-9]+]]:
; CHECK: ldaxrb [[LOADED:w[0-9]+]], [x0]
; CHECK: cmp [[LOADED]], w1, uxtb
; CHECK: b.ne [[FAILED:LBB[0-9]+_[0-9]+]]
; CHECK: stlxrb [[STATUS:w[0-9]+]], {{w[0-9]+}}, [x0]
; CHECK: cbnz [[STATUS]], [[LOOP]]
; CHECK-NOT: cmp {{w[0-9]+}}, {{w[0-9]+}}
; FIXME: DAG combine should be able to deal with this.
; CHECK: orr [[TMP:w[0-9]+]], wzr, #0x1
; CHECK: eor w0, [[TMP]], #0x1
; CHECK: ret
; CHECK: [[FAILED]]:
; CHECK-NOT: cmp {{w[0-9]+}}, {{w[0-9]+}}
; CHECK: mov [[TMP:w[0-9]+]], wzr
; CHECK: eor w0, [[TMP]], #0x1
; CHECK: ret
%pair = cmpxchg i8* %value, i8 %oldValue, i8 %newValue acq_rel monotonic
%success = extractvalue { i8, i1 } %pair, 1
%failure = xor i1 %success, 1
ret i1 %failure
}
define void @test_conditional(i32* %p, i32 %oldval, i32 %newval) {
; CHECK-LABEL: test_conditional:
; CHECK: [[LOOP:LBB[0-9]+_[0-9]+]]:
; CHECK: ldaxr [[LOADED:w[0-9]+]], [x0]
; CHECK: cmp [[LOADED]], w1
; CHECK: b.ne [[FAILED:LBB[0-9]+_[0-9]+]]
; CHECK: stlxr [[STATUS:w[0-9]+]], w2, [x0]
; CHECK: cbnz [[STATUS]], [[LOOP]]
; CHECK-NOT: cmp {{w[0-9]+}}, {{w[0-9]+}}
; CHECK: b _bar
; CHECK: [[FAILED]]:
; CHECK-NOT: cmp {{w[0-9]+}}, {{w[0-9]+}}
; CHECK: b _baz
%pair = cmpxchg i32* %p, i32 %oldval, i32 %newval seq_cst seq_cst
%success = extractvalue { i32, i1 } %pair, 1
br i1 %success, label %true, label %false
true:
tail call void @bar() #2
br label %end
false:
tail call void @baz() #2
br label %end
end:
ret void
}
declare void @bar()
declare void @baz()
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