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<base href="https://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - New GVN causes a failure in some lnt tests on PowerPC"
href="https://llvm.org/bugs/show_bug.cgi?id=31483">31483</a>
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<tr>
<th>Summary</th>
<td>New GVN causes a failure in some lnt tests on PowerPC
</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>All
</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>
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<th>Component</th>
<td>Scalar Optimizations
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>nemanja.i.ibm@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>The following has been reduced by creduce from
projects/test-suite/SingleSource/UnitTests/2003-08-11-VaListArg.c
#include <stdarg.h>
test(char *fmt, va_list ap) {
char *s;
while (*fmt)
switch (*fmt++) {
case 's':
s = va_arg(ap, char *);
printf("string %s\n", s);
break;
case 'i':
case 'c':
va_arg(ap, int);
}
va_end(ap);
}
testVaListArg(*fmt, ...) {
va_list ap;
va_start(ap, fmt);
test(fmt, ap);
}
main() {
testVaListArg("ssiciiiiis", "", "def", 3, 'a', 3, 6, 7, 8, 9, "10 args
done");
}
That is one of the test cases that fails with -mllvm -new-gvn.
The complete command line to build it is:
clang -I $LNT_BUILD_DIR/SingleSource/UnitTests -I
$LLVM_SRC/projects/test-suite/SingleSource/UnitTests -I
$LLVM_SRC/projects/test-suite/include -I../../include -D_GNU_SOURCE
-D__STDC_LIMIT_MACROS -DNDEBUG -O3 -mllvm -enable-newgvn -ffp-contract=off
-ffp-contract=off -fomit-frame-pointer 2003-08-11-VaListArg.c
I understand that access to a PPC machine is sometimes tricky to get so if this
is somehow unique to PPC, I'm happy to assist with providing further
information.
This is with revision 290604 of trunk.</pre>
</div>
</p>
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