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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [inline asm; x86] regression in support of "A" constraint, selecting rax instead of eax"
href="https://bugs.llvm.org/show_bug.cgi?id=33615">33615</a>
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<th>Summary</th>
<td>[inline asm; x86] regression in support of "A" constraint, selecting rax instead of eax
</td>
</tr>
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<th>Product</th>
<td>new-bugs
</td>
</tr>
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<th>Version</th>
<td>4.0
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>new bugs
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>eric.schweitz@pgroup.com
</td>
</tr>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
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<p>
<div>
<pre>int a,b,x;
int test() {
asm (
"movl %1,%0;"
"addl %2,%0"
: "=A" (x) : "D" (a), "S" (b) );
}
This compiles with clang 3.9, but not with clang 4.0.
foo.c:22:2: error: invalid operand for instruction
"movl %1,%0;"
^
<inline asm>:1:15: note: instantiated into assembly here
movl %edi,%rax;addl %esi,%rax
^~~~~
foo.c:22:2: error: invalid operand for instruction
"movl %1,%0;"
^
<inline asm>:1:30: note: instantiated into assembly here
movl %edi,%rax;addl %esi,%rax
^~~~
2 errors generated.</pre>
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