<html>
<head>
<base href="https://llvm.org/bugs/" />
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [btver2] Fix a crash in combineOrCmpEqZeroToCtlzSrl under fast math"
href="https://llvm.org/bugs/show_bug.cgi?id=31902">31902</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[btver2] Fix a crash in combineOrCmpEqZeroToCtlzSrl under fast math
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Windows NT
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>Backend: X86
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>pierregousseau14@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Example:
class C {
void foo(double*) const;
int h;
double y;
double x;
double z;
};
void C::foo(double *input) const {
int i;
double val;
double val1 = -1;
double val2 = z;
while (x >= 0 && i < h) {
if (!y) {
if (input[0] != 0 && val1 < val2) {
} else {
i++;
val = val2;
}
if (val) {
}
}
}
}
<span class="quote">> clang -ffast-math -march=btver2 -O2 -S</span >
This crashes with the following assertion:
Assertion failed: isa<X>(Val) && "cast<Ty>() argument of incompatible type!"
The problem is caused when isSetCCCandidate is operating on a X86ISD::CMP node
where operands are floating points.
I have a fix for this issue which I plan to send for review.</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are on the CC list for the bug.</li>
</ul>
</body>
</html>