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<base href="http://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Clang integrated assembler doesn't accept asm macro defined in one asm directive and used in another"
href="http://llvm.org/bugs/show_bug.cgi?id=19749">19749</a>
</td>
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<th>Summary</th>
<td>Clang integrated assembler doesn't accept asm macro defined in one asm directive and used in another
</td>
</tr>
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<th>Product</th>
<td>clang
</td>
</tr>
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<th>Version</th>
<td>trunk
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>All
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>Frontend
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>jonathan@codesourcery.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Integrated assembler refuses to accept code where an asm macro is defined
outside a function but the use is in a different asm block. This example also
demonstrates a workaround, on case others stumble across this bug too.
$ cat foobar.c
#if defined(MACRO_OUTSIDE)
asm(
".macro RETURN cond=\n\t"
"bx\\cond lr\n\t"
".endm\n\t"
);
#endif
char* __attribute__((naked))
foo(char* bar)
{
asm (
#if !defined(MACRO_OUTSIDE)
".macro RETURN cond=\n\t"
"bx\\cond lr\n\t"
".endm\n\t"
#endif
"RETURN\n"
);
}
$ clang -target arm-none-eabi -march=armv7 -g -O2 -c foobar.c -fintegrated-as
$ clang -target arm-none-eabi -march=armv7 -g -O2 -c foobar.c
-fno-integrated-as
$ clang -target arm-none-eabi -march=armv7 -g -O2 -c foobar.c
-fno-integrated-as -DMACRO_OUTSIDE
$ clang -target arm-none-eabi -march=armv7 -g -O2 -c foobar.c -fintegrated-as
-DMACRO_OUTSIDE
foobar.c:18:5: error: invalid instruction
"RETURN\n"
^
<inline asm>:1:2: note: instantiated into assembly here
RETURN
^~~~~~
1 error generated.
[15:01:37] ✘ jroelofs@build1-lucid-cs arm-none-eabi-lite$</pre>
</div>
</p>
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