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<base href="http://llvm.org/bugs/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - "function-local metadata used in wrong function" for a small ObjC program with a block"
href="http://llvm.org/bugs/show_bug.cgi?id=17202">17202</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>"function-local metadata used in wrong function" for a small ObjC program with a block
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>MacOS X
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>Common Code Generator Code
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>glider@google.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>$ cat MPS.ii
@interface NSDictionary @end
@interface NSDictionary (NSExtendedDictionary) - (NSDictionary *)allKeys; @end
@interface NSDictionary (NSDictionaryCreation) + (id)dictionary; @end
@protocol Cache
- (void)completionHandler:(void (^)())handler;
@end
@interface Cache<Cache> @end
Cache *cache;
void save() {
NSDictionary *data = [NSDictionary dictionary];
[cache
completionHandler:^(){
if (0) { NSDictionary *storedKeys = [data allKeys]; }
}
];
}
-----------------------cut---------------------------
$ clang -ObjC -g -c MPS.ii -o MPS.o
function-local metadata used in wrong function
metadata !{<{ i8*, i32, i32, i8*, %struct.__block_descriptor*, %1* }>**
%block.addr}
%block.addr = alloca <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, %1*
}>*, align 8
Broken module found, compilation aborted!
0 clang-3.4 0x00000001057989a8 llvm::sys::PrintStackTrace(__sFILE*) +
40
1 clang-3.4 0x0000000105798ef4 SignalHandler(int) + 644
2 libsystem_c.dylib 0x00007fff8cbe894a _sigtramp + 26
3 libsystem_c.dylib 000000000000000000 _sigtramp + 1933670096
4 clang-3.4 0x0000000105798c56 abort + 22
5 clang-3.4 0x00000001056c5beb (anonymous
namespace)::Verifier::abortIfBroken() + 523
6 clang-3.4 0x00000001056c5849 (anonymous
namespace)::Verifier::runOnFunction(llvm::Function&) + 1945
...
0. Program arguments: <cut>/bin/clang-3.4 -cc1 -triple
x86_64-apple-macosx10.8.0 -emit-obj -mrelax-all -disable-free -main-file-name
MPS.ii -mrelocation-model pic -pic-level 2 -mdisable-fp-elim -masm-verbose
-munwind-tables -target-cpu core2 -gdwarf-2 -coverage-file <cut>/MPS.o
-resource-dir <cut>/../lib/clang/3.4 -fdebug-compilation-dir <cut>
-ferror-limit 19 -fmessage-length 164 -stack-protector 1 -mstackrealign
-fblocks -fobjc-runtime=macosx-10.8.0 -fobjc-dispatch-method=mixed
-fobjc-default-synthesize-properties -fencode-extended-block-signature
-fobjc-exceptions -fexceptions -fdiagnostics-show-option -fcolor-diagnostics
-vectorize-slp -o MPS.o -x objective-c MPS.ii
1. <eof> parser at end of file
2. Per-function optimization
3. Running pass 'Module Verifier' on function '@__save_block_invoke'
clang-3.4: error: unable to execute command: Illegal instruction: 4</pre>
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