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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - clang ignores #pragma CX_LIMITED_RANGE"
href="https://bugs.llvm.org/show_bug.cgi?id=33856">33856</a>
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<th>Summary</th>
<td>clang ignores #pragma CX_LIMITED_RANGE
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>3.8
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>enhancement
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>-New Bugs
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>smcallis@gmail.com
</td>
</tr>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
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<p>
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<pre>At least on clang 3.8.0-2 (Ubuntu 16.04), this code:
//#pragma CX_LIMITED_RANGE on
#include <stdio.h>
#include <stdlib.h>
#include <complex.h>
int main() {
float complex a = rand() + I*rand();
float complex b = rand() + I*rand();
float complex c = a*b;
printf("res: %f,%f\n", __real__ c, __imag__ c);
}
generates identical assembly with and without the pragma on. I'm not sure the
implementation is _required_ to simplify complex arithmetic with it on, but I
think that's the spirit of the standard.</pre>
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