diff options
| author | Michael Gottesman <mgottesman@apple.com> | 2013-03-29 21:15:23 +0000 |
|---|---|---|
| committer | Michael Gottesman <mgottesman@apple.com> | 2013-03-29 21:15:23 +0000 |
| commit | 3e9f3a0389488701bd1cb5c778d0e785c827d790 (patch) | |
| tree | b535070ad57755695d14e9adf2d85557ab2255a6 | |
| parent | 2a88555e0d92a22b50966b223bab19d8518a8f27 (diff) | |
Add clang.arc.used to ModuleHasARC so ARC always runs if said call is present in a module.
clang.arc.used is an interesting call for ARC since ObjCARCContract
needs to run to remove said intrinsic to avoid a linker error (since the
call does not exist).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178369 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/Transforms/ObjCARC/ObjCARC.h | 3 | ||||
| -rw-r--r-- | test/Transforms/ObjCARC/clang-arc-used-intrinsic-removed-if-isolated.ll | 16 |
2 files changed, 18 insertions, 1 deletions
diff --git a/lib/Transforms/ObjCARC/ObjCARC.h b/lib/Transforms/ObjCARC/ObjCARC.h index 614fa29e3e..39670f339e 100644 --- a/lib/Transforms/ObjCARC/ObjCARC.h +++ b/lib/Transforms/ObjCARC/ObjCARC.h @@ -64,7 +64,8 @@ static inline bool ModuleHasARC(const Module &M) { M.getNamedValue("objc_copyWeak") || M.getNamedValue("objc_retainedObject") || M.getNamedValue("objc_unretainedObject") || - M.getNamedValue("objc_unretainedPointer"); + M.getNamedValue("objc_unretainedPointer") || + M.getNamedValue("clang.arc.use"); } /// \enum InstructionClass diff --git a/test/Transforms/ObjCARC/clang-arc-used-intrinsic-removed-if-isolated.ll b/test/Transforms/ObjCARC/clang-arc-used-intrinsic-removed-if-isolated.ll new file mode 100644 index 0000000000..4215b5c364 --- /dev/null +++ b/test/Transforms/ObjCARC/clang-arc-used-intrinsic-removed-if-isolated.ll @@ -0,0 +1,16 @@ +; RUN: opt -objc-arc-contract -S < %s | FileCheck %s + +; This file makes sure that clang.arc.used is removed even if no other ARC +; interesting calls are in the module. + +declare void @clang.arc.use(...) nounwind + +; Kill calls to @clang.arc.use(...) +; CHECK: define void @test0( +; CHECK-NOT: clang.arc.use +; CHECK: } +define void @test0(i8* %a, i8* %b) { + call void (...)* @clang.arc.use(i8* %a, i8* %b) nounwind + ret void +} + |