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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 --- - illegal hardware instruction emitted"
href="http://llvm.org/bugs/show_bug.cgi?id=18558">18558</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>illegal hardware instruction emitted
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>3.3
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</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>-New Bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>devel@fresse.org
</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>Following input:
-8<--8<--8<--8<--8<--8<--8<--8<--8<--8<--8<--8<--8<-
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
int
main(int argc, char *argv[])
{
char buf[] = "133-g77ef88fe\n";
char *bp;
/* read distance */
(void)strtoul(buf, &bp, 10);
if (*bp == '-') {
/* offending code */
bp = (char*)0U + (bp - (char*)0U);
}
if (*bp == '-' || *bp == 'g') {
bp++;
}
puts("OK");
return 0;
}
-8<--8<--8<--8<--8<--8<--8<--8<--8<--8<--8<--8<--8<-
Compiled with:
$ clang -std=c99 -O2 -Wall broken-01.c
Results in:
$ ./a.out
[2] 17909 illegal hardware instruction (core dumped) ./a.out
Same problem when compiled as C++.</pre>
</div>
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