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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - type mismatch assertion violation when generating code for function declaration"
href="https://bugs.llvm.org/show_bug.cgi?id=50988">50988</a>
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<th>Summary</th>
<td>type mismatch assertion violation when generating code for function declaration
</td>
</tr>
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<th>Product</th>
<td>new-bugs
</td>
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>enhancement
</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
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<th>Reporter</th>
<td>k.even-mendoza@imperial.ac.uk
</td>
</tr>
<tr>
<th>CC</th>
<td>htmldeveloper@gmail.com, llvm-bugs@lists.llvm.org
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<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=25002" name="attach_25002" title="trace and additional information">attachment 25002</a> <a href="attachment.cgi?id=25002&action=edit" title="trace and additional information">[details]</a></span>
trace and additional information
The following code crashed Clang when adding debug information.
static int d, b, k;
static char c[];
static int e[];
static int *f = e;
static short h();
short h() {
int *n = &b;
char *o = &d;
*n = ((&c == o) > 40, 1); /* HERE */
return 0;
}
int main() { h(); }
Compile: clang-13 0e836490069ceb4a485d852034e50a9c_878_test2520436154.c -o
del.o
Version: the trace here is created from the trunk of today compiled with an
address sanitizer.
clang version 13.0.0 (<a href="https://github.com/llvm/llvm-project.git">https://github.com/llvm/llvm-project.git</a>
5db826e4ce63a4d45a4695e5486841d08b86cd24)
Target: x86_64-unknown-linux-gnu
I am not sure that the bugs are actually related, because this trace doesn't
pass through the loop vectorization part, but I still tested with the fix for
<a class="bz_bug_link
bz_status_NEW "
title="NEW - [LoopVectorizer] Assertion "Both operands to ICmp instruction are not of the same type!" failed."
href="show_bug.cgi?id=45943">bug #45943</a>; the crash still happens, as well as with previous versions:
clang-13, clang-12 and clang-10.
It failed with an assertion violation:
llvm/include/llvm/IR/Instructions.h:1215: void llvm::ICmpInst::AssertOK():
Assertion `getOperand(0)->getType() == getOperand(1)->getType() && "Both
operands to ICmp instruction are not of the same type!"' failed.
Trace: see the attachment.
One interesting thing is that removing the line "static short h();" eliminates
the crash.</pre>
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