derek.holloway
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47 lines
1.3 KiB
LLVM
47 lines
1.3 KiB
LLVM
; RUN: opt -passes=objc-arc -S < %s | FileCheck %s
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; Generated by compiling:
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;
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; id baz(ptr X) { return (__bridge_transfer id)X; }
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;
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; void foo(id X) {
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; ptr Y = 0;
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; if (X)
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; Y = (__bridge_retained ptr)X;
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; baz(Y);
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; }
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;
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; clang -x objective-c -mllvm -enable-objc-arc-opts=0 -fobjc-arc -S -emit-llvm test.m
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;
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; And then hand-reduced further.
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declare ptr @llvm.objc.autoreleaseReturnValue(ptr)
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declare ptr @llvm.objc.unsafeClaimAutoreleasedReturnValue(ptr)
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declare ptr @llvm.objc.retain(ptr)
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declare void @llvm.objc.release(ptr)
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define void @foo(ptr %X) {
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entry:
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%0 = tail call ptr @llvm.objc.retain(ptr %X)
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%tobool = icmp eq ptr %0, null
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br i1 %tobool, label %if.end, label %if.then
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if.then: ; preds = %entry
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%1 = tail call ptr @llvm.objc.retain(ptr nonnull %0)
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br label %if.end
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if.end: ; preds = %if.then, %entry
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%Y.0 = phi ptr [ %1, %if.then ], [ null, %entry ]
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%2 = tail call ptr @llvm.objc.autoreleaseReturnValue(ptr %Y.0)
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%3 = tail call ptr @llvm.objc.unsafeClaimAutoreleasedReturnValue(ptr %2)
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tail call void @llvm.objc.release(ptr %0)
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ret void
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}
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; CHECK: if.then
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; CHECK: tail call ptr @llvm.objc.retain
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; CHECK: %Y.0 = phi
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; CHECK-NEXT: tail call void @llvm.objc.release
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; CHECK-NEXT: tail call void @llvm.objc.release
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