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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - llvm::APFloat::opStatus llvm::APFloat::normalize(llvm::APFloat::roundingMode, llvm::lostFraction): Assertion `lost_fraction == lfExactlyZero' failed"
href="http://llvm.org/bugs/show_bug.cgi?id=16573">16573</a>
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<th>Summary</th>
<td>llvm::APFloat::opStatus llvm::APFloat::normalize(llvm::APFloat::roundingMode, llvm::lostFraction): Assertion `lost_fraction == lfExactlyZero' failed
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
<tr>
<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>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>Support Libraries
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>hfinkel@anl.gov
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
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<p>
<div>
<pre>If you run this through llc:
target triple = "powerpc64-unknown-linux-gnu"
define void @autogen_SD13757() {
BB:
br label %CF76
CF76: ; preds = %CF76, %BB
%B16 = frem ppc_fp128 0xM818F2887B9295809800000000032D000,
0xMFE1D8EBCE21B683A0000000000000000
%Tr24 = fptrunc ppc_fp128 %B16 to double
br label %CF76
}
then you get:
/llvm-trunk/lib/Support/APFloat.cpp:1261: llvm::APFloat::opStatus
llvm::APFloat::normalize(llvm::APFloat::roundingMode, llvm::lostFraction):
Assertion `lost_fraction == lfExactlyZero' failed.
DAG.getNode(ISD::FP_ROUND, ...) is calling
APFloat::convert (to convert to f64) is calling
APFloat::normalize which is asserting here:
1259 /* Shifting left is easy as we don't lose precision. */
1260 if (exponentChange < 0) {
1261 assert(lost_fraction == lfExactlyZero);</pre>
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