derek.holloway
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50 lines
1.6 KiB
LLVM
50 lines
1.6 KiB
LLVM
; RUN: opt -passes=objc-arc -S < %s | FileCheck %s
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target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"
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declare ptr @llvm.objc.retain(ptr)
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declare void @llvm.objc.release(ptr)
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; Retain must not sink past atomicrmw.
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define void @test_atomicrmw(ptr %obj, ptr %atomic_slot) {
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; CHECK-LABEL: @test_atomicrmw
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; CHECK: call ptr @llvm.objc.retain
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; CHECK: atomicrmw
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entry:
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%obj_as_int = ptrtoint ptr %obj to i64
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%retained = call ptr @llvm.objc.retain(ptr %obj)
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%old_value = atomicrmw xchg ptr %atomic_slot, i64 %obj_as_int monotonic, align 8
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%old_obj = inttoptr i64 %old_value to ptr
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call void @llvm.objc.release(ptr %old_obj)
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call void @llvm.objc.release(ptr %obj)
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ret void
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}
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; Retain must not sink past cmpxchg.
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define void @test_cmpxchg(ptr %obj, ptr %atomic_slot, i64 %expected) {
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; CHECK-LABEL: @test_cmpxchg
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; CHECK: call ptr @llvm.objc.retain
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; CHECK: cmpxchg
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entry:
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%obj_as_int = ptrtoint ptr %obj to i64
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%retained = call ptr @llvm.objc.retain(ptr %obj)
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%res = cmpxchg ptr %atomic_slot, i64 %expected, i64 %obj_as_int monotonic monotonic, align 8
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%old_int = extractvalue { i64, i1 } %res, 0
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%old_obj = inttoptr i64 %old_int to ptr
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call void @llvm.objc.release(ptr %old_obj)
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call void @llvm.objc.release(ptr %obj)
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ret void
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}
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; Retain must not sink past an atomic store.
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define void @test_atomic_store(ptr %obj, ptr %slot) {
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; CHECK-LABEL: @test_atomic_store
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; CHECK: call ptr @llvm.objc.retain
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; CHECK: store atomic
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entry:
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%retained = call ptr @llvm.objc.retain(ptr %obj)
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store atomic ptr %obj, ptr %slot monotonic, align 8
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call void @llvm.objc.release(ptr %obj)
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ret void
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}
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