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<base href="http://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - store forwarding across operator new() call"
href="http://llvm.org/bugs/show_bug.cgi?id=16386">16386</a>
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<th>Summary</th>
<td>store forwarding across operator new() call
</td>
</tr>
<tr>
<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>
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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>Scalar Optimizations
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>eugeni.stepanov@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>int x;
volatile int z;
int *f() {
x = 1;
int *p = new int;
z = x;
return p;
}
clang -O2:
store i32 1, i32* @x, align 4, !tbaa !0
%call = tail call noalias i8* @_Znwm(i64 4)
%0 = bitcast i8* %call to i32*
store volatile i32 1, i32* @z, align 4, !tbaa !0
This does not allow overloading operator new() to access 'x'.
-fno-sane-operator-new disables this optimization.
AFAIU, it should be always disabled.</pre>
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