<table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Issue</th>
<td>
<a href=https://github.com/llvm/llvm-project/issues/129249>129249</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>
Poor scalability of empty block elimination in SimplifyCFG
</td>
</tr>
<tr>
<th>Labels</th>
<td>
new issue
</td>
</tr>
<tr>
<th>Assignees</th>
<td>
</td>
</tr>
<tr>
<th>Reporter</th>
<td>
amonakov
</td>
</tr>
</table>
<pre>
```c
int f(int);
#define T if (f(++i)) { return i; }
#define X16(X) X X X X X X X X X X X X X X X X
int g()
{
int i = 0;
X16(X16(X16(T)))
#ifdef TWICE
X16(X16(X16(T)))
#endif
return 0;
}
```
</pre>
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