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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - optimizer malloc"
href="https://bugs.llvm.org/show_bug.cgi?id=50482">50482</a>
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<th>Summary</th>
<td>optimizer malloc
</td>
</tr>
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<th>Product</th>
<td>clang
</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>
</tr>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>C
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>victor.yodaiken@gmail.com
</td>
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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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<p>
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<pre>#include <stdlib.h>
int is_any_memory_available(int n){
char *x = malloc(n);
int y = (x != NULL);
free(x);
return y;
}
Works with -O0
With -O3 is optmized to
is_any_memory_available: # @is_any_memory_available
mov eax, 1
ret
<a href="https://godbolt.org/z/4fr7Wz7n7">https://godbolt.org/z/4fr7Wz7n7</a></pre>
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