diff options
Diffstat (limited to 'test/Transforms/ObjCARC/retain-block-escape-analysis.ll')
| -rw-r--r-- | test/Transforms/ObjCARC/retain-block-escape-analysis.ll | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/test/Transforms/ObjCARC/retain-block-escape-analysis.ll b/test/Transforms/ObjCARC/retain-block-escape-analysis.ll index 05f4c36..2c1ddce 100644 --- a/test/Transforms/ObjCARC/retain-block-escape-analysis.ll +++ b/test/Transforms/ObjCARC/retain-block-escape-analysis.ll @@ -97,4 +97,31 @@ end: ret void } +;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; +; This test makes sure that we do not hang clang when visiting a use ; +; cycle caused by phi nodes during objc-arc analysis. *NOTE* This ; +; test case looks a little convoluted since it was produced by ; +; bugpoint. ; +; ; +; bugzilla://14551 ; +; rdar://12851911 ; +;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; + +define void @phinode_use_cycle(i8* %block) uwtable optsize ssp { +; CHECK: define void @phinode_use_cycle(i8* %block) +entry: + br label %for.body + +for.body: ; preds = %if.then, %for.body, %entry + %block.05 = phi void (...)* [ null, %entry ], [ %1, %if.then ], [ %block.05, %for.body ] + br i1 undef, label %for.body, label %if.then + +if.then: ; preds = %for.body + %0 = call i8* @objc_retainBlock(i8* %block), !clang.arc.copy_on_escape !0 + %1 = bitcast i8* %0 to void (...)* + %2 = bitcast void (...)* %block.05 to i8* + call void @objc_release(i8* %2) nounwind, !clang.imprecise_release !0 + br label %for.body +} + !0 = metadata !{} |