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| author | Dan Gohman <gohman@apple.com> | 2011-09-14 18:13:00 +0000 |
|---|---|---|
| committer | Dan Gohman <gohman@apple.com> | 2011-09-14 18:13:00 +0000 |
| commit | 211048286bef00ffcf04b1b3e1bb3de3de79965a (patch) | |
| tree | 782d5bd224410f6fcc0532ec902ee6944389b727 /test/Transforms | |
| parent | d0588e2a2ed1f7570f13b78c2042855dc4afae10 (diff) | |
| download | llvm-211048286bef00ffcf04b1b3e1bb3de3de79965a.tar.gz llvm-211048286bef00ffcf04b1b3e1bb3de3de79965a.tar.bz2 llvm-211048286bef00ffcf04b1b3e1bb3de3de79965a.tar.xz | |
objc_retainBlock is not NoModRef because it can update forwarding pointers
in memory relevant to the optimizer. rdar://10050579.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139708 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms')
| -rw-r--r-- | test/Transforms/ObjCARC/retain-block-side-effects.ll | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/test/Transforms/ObjCARC/retain-block-side-effects.ll b/test/Transforms/ObjCARC/retain-block-side-effects.ll new file mode 100644 index 0000000000..e84d48f869 --- /dev/null +++ b/test/Transforms/ObjCARC/retain-block-side-effects.ll @@ -0,0 +1,39 @@ +; RUN: opt -S -objc-arc-aa -basicaa -gvn < %s | FileCheck %s +; rdar://10050579 + +; objc_retainBlock stores into %repeater so the load from after the +; call isn't forwardable from the store before the call. + +; CHECK: %tmp16 = call i8* @objc_retainBlock(i8* %tmp15) nounwind +; CHECK: %tmp17 = bitcast i8* %tmp16 to void ()* +; CHECK: %tmp18 = load %struct.__block_byref_repeater** %byref.forwarding, align 8 +; CHECK: %repeater12 = getelementptr inbounds %struct.__block_byref_repeater* %tmp18, i64 0, i32 6 +; CHECK: store void ()* %tmp17, void ()** %repeater12, align 8 + +target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64" + +%0 = type opaque +%struct.__block_byref_repeater = type { i8*, %struct.__block_byref_repeater*, i32, i32, i8*, i8*, void ()* } +%struct.__block_descriptor = type { i64, i64 } + +define void @foo() noreturn { +entry: + %repeater = alloca %struct.__block_byref_repeater, align 8 + %block = alloca <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, %0*, i8* }>, align 8 + %byref.forwarding = getelementptr inbounds %struct.__block_byref_repeater* %repeater, i64 0, i32 1 + %tmp10 = getelementptr inbounds %struct.__block_byref_repeater* %repeater, i64 0, i32 6 + store void ()* null, void ()** %tmp10, align 8 + %block.captured11 = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, %0*, i8* }>* %block, i64 0, i32 6 + %tmp14 = bitcast %struct.__block_byref_repeater* %repeater to i8* + store i8* %tmp14, i8** %block.captured11, align 8 + %tmp15 = bitcast <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, %0*, i8* }>* %block to i8* + %tmp16 = call i8* @objc_retainBlock(i8* %tmp15) nounwind + %tmp17 = bitcast i8* %tmp16 to void ()* + %tmp18 = load %struct.__block_byref_repeater** %byref.forwarding, align 8 + %repeater12 = getelementptr inbounds %struct.__block_byref_repeater* %tmp18, i64 0, i32 6 + %tmp13 = load void ()** %repeater12, align 8 + store void ()* %tmp17, void ()** %repeater12, align 8 + ret void +} + +declare i8* @objc_retainBlock(i8*) |