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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [ARM64] fatal error: error in backend: Cannot select: 0x7d713c0: f64 = ConstantFP<-0.000000e+00>"
href="http://llvm.org/bugs/show_bug.cgi?id=19638">19638</a>
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<th>Summary</th>
<td>[ARM64] fatal error: error in backend: Cannot select: 0x7d713c0: f64 = ConstantFP<-0.000000e+00>
</td>
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<th>Product</th>
<td>libraries
</td>
</tr>
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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>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>Backend: AArch64
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>mcrosier@codeaurora.org
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<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
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<th>Classification</th>
<td>Unclassified
</td>
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<p>
<div>
<pre>Reduced test case:
target datalayout = "e-m:e-i64:64-i128:128-n32:64-S128"
target triple = "arm64-none-linux-gnu"
define double @test(double %a, double %b) {
entry:
%mul = fmul double %a, 0.000000e+00
%mul1 = fmul double %b, 0.000000e+00
%sub = fsub double %mul, %mul1
ret double %sub
}
Reproduce with:
llc -O3 -fp-contract=fast test.ll</pre>
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