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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [attributor] Segmentation fault when bitcast"
href="https://bugs.llvm.org/show_bug.cgi?id=51448">51448</a>
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<th>Summary</th>
<td>[attributor] Segmentation fault when bitcast
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>12.0
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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
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<th>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>C
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>1593409937@stu.csust.edu.cn
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<th>CC</th>
<td>blitzrakete@gmail.com, dgregor@apple.com, erik.pilkington@gmail.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
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<pre>When I try to compile this C file, I got the Segmentation fault:
// clang -mcpu=tsv110 -O3 -fuse-ld=lld -flto=full test-creduce.c -w
int a;
static unsigned long b();
void c() {
long d = b();
a = d;
}
unsigned long b(char *e, long f) { return f; }
int main() {}
Attributor optimization has been disabled, but we can still reproduce this
problem.
// opt -attributor -enable-new-pm=0 -attributor-manifest-internal -S %s
define i16 @foo3() {
%call = call i16 bitcast (i16 (i16*, i16) * @bar3 to i16 () *)()
ret i16 %call
}
define internal i16 @bar3(i16* %p1, i16 %p2) {
ret i16 %p2
}</pre>
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