unsafe-claim-rv.ll
1.31 KB
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; RUN: opt -objc-arc -S < %s | FileCheck %s
; Generated by compiling:
;
; id baz(void *X) { return (__bridge_transfer id)X; }
;
; void foo(id X) {
; void *Y = 0;
; if (X)
; Y = (__bridge_retained void *)X;
; baz(Y);
; }
;
; clang -x objective-c -mllvm -enable-objc-arc-opts=0 -fobjc-arc -S -emit-llvm test.m
;
; And then hand-reduced further.
declare i8* @llvm.objc.autoreleaseReturnValue(i8*)
declare i8* @llvm.objc.unsafeClaimAutoreleasedReturnValue(i8*)
declare i8* @llvm.objc.retain(i8*)
declare void @llvm.objc.release(i8*)
define void @foo(i8* %X) {
entry:
%0 = tail call i8* @llvm.objc.retain(i8* %X)
%tobool = icmp eq i8* %0, null
br i1 %tobool, label %if.end, label %if.then
if.then: ; preds = %entry
%1 = tail call i8* @llvm.objc.retain(i8* nonnull %0)
br label %if.end
if.end: ; preds = %if.then, %entry
%Y.0 = phi i8* [ %1, %if.then ], [ null, %entry ]
%2 = tail call i8* @llvm.objc.autoreleaseReturnValue(i8* %Y.0)
%3 = tail call i8* @llvm.objc.unsafeClaimAutoreleasedReturnValue(i8* %2)
tail call void @llvm.objc.release(i8* %0)
ret void
}
; CHECK: if.then
; CHECK: tail call i8* @llvm.objc.retain
; CHECK: %Y.0 = phi
; CHECK-NEXT: tail call void @llvm.objc.release
; CHECK-NEXT: tail call void @llvm.objc.release