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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Large call sequence causes FastISel compile time problems"
href="https://bugs.llvm.org/show_bug.cgi?id=37010">37010</a>
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<th>Summary</th>
<td>Large call sequence causes FastISel compile time problems
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
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<th>Version</th>
<td>trunk
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Windows NT
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>Common Code Generator Code
</td>
</tr>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>andrew.kaylor@intel.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=20158" name="attach_20158" title="Reproducing bitcode">attachment 20158</a> <a href="attachment.cgi?id=20158&action=edit" title="Reproducing bitcode">[details]</a></span>
Reproducing bitcode
A long sequence of function calls can cause the FastISel compile time to blow
up as we try to sink local value materializations.
The problem can be reproduced using a test case that looks like this (bitcode
attached):
---
double f(double d) { return d * d; }
int main() {
printf("%f\n", f(1.0));
printf("%f\n", f(2.0));
printf("%f\n", f(3.0));
...
printf("%f\n", f(15000.0));
exit(0);
}
---
This problem was introduced in r327581 (<a href="https://reviews.llvm.org/D43093">https://reviews.llvm.org/D43093</a>).</pre>
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