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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Attributor annotate dereferenceable(1) to void call site, and failed verifier"
href="https://bugs.llvm.org/show_bug.cgi?id=48810">48810</a>
</td>
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<th>Summary</th>
<td>Attributor annotate dereferenceable(1) to void call site, and failed verifier
</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>
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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>enhancement
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>Interprocedural Optimizations
</td>
</tr>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>zequanwu@google.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>Here is the minimum repro.
repro.c:
a, b;
void *mempcpy(void *, *, long);
c(*) {
char *d = mempcpy(d, a, b);
*d = '\0';
c(d);
}
repro.sh:
clang -mllvm -attributor-enable=module -O2 repro.c
error:
Wrong types for attribute: inalloca nest noalias nocapture noundef nonnull
readnone readonly signext zeroext byref(void) byval(void) preallocated(void)
sret(void) align 1 dereferenceable(1) dereferenceable_or_null(1)
tail call nonnull dereferenceable(1) void @llvm.memcpy.p0i8.p0i8.i64(i8*
align 1 undef, i8* readonly align 1 %3, i64 %conv1, i1 false) #3
in function c
fatal error: error in backend: Broken function found, compilation aborted!
clang-12: error: clang frontend command failed with exit code 70 (use -v to see
invocation)</pre>
</div>
</p>
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