derek.holloway
7502bf64a4
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42 lines
1.2 KiB
LLVM
42 lines
1.2 KiB
LLVM
; RUN: opt -passes=objc-arc-contract -S < %s | FileCheck %s
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declare ptr @llvm.objc.autoreleaseReturnValue(ptr)
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declare ptr @foo1()
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; Check that ARC contraction replaces the function return with the value
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; returned by @llvm.objc.autoreleaseReturnValue.
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; CHECK-LABEL: define ptr @autoreleaseRVTailCall(
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; CHECK: %[[V0:[0-9]+]] = tail call ptr @llvm.objc.autoreleaseReturnValue(
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; CHECK: ret ptr %[[V0]]
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define ptr @autoreleaseRVTailCall() {
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%1 = call ptr @foo1()
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%2 = tail call ptr @llvm.objc.autoreleaseReturnValue(ptr %1)
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ret ptr %1
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}
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declare ptr @foo2(i32);
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; CHECK-LABEL: define ptr @autoreleaseRVTailCallPhi(
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; CHECK: %[[PHIVAL:.*]] = phi ptr [ %{{.*}}, %bb1 ], [ %{{.*}}, %bb2 ]
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; CHECK: %[[RETVAL:.*]] = phi ptr [ %{{.*}}, %bb1 ], [ %{{.*}}, %bb2 ]
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; CHECK: %[[V4:.*]] = tail call ptr @llvm.objc.autoreleaseReturnValue(ptr %[[PHIVAL]])
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; CHECK: ret ptr %[[V4]]
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define ptr @autoreleaseRVTailCallPhi(i1 %cond) {
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entry:
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br i1 %cond, label %bb1, label %bb2
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bb1:
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%v0 = call ptr @foo2(i32 1)
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br label %bb3
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bb2:
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%v2 = call ptr @foo2(i32 2)
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br label %bb3
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bb3:
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%phival = phi ptr [ %v0, %bb1 ], [ %v2, %bb2 ]
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%retval = phi ptr [ %v0, %bb1 ], [ %v2, %bb2 ]
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%v4 = tail call ptr @llvm.objc.autoreleaseReturnValue(ptr %phival)
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ret ptr %retval
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}
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