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<base href="https://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - ExtractGV externalizes private strings"
href="https://llvm.org/bugs/show_bug.cgi?id=31674">31674</a>
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<th>Summary</th>
<td>ExtractGV externalizes private strings
</td>
</tr>
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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>Windows NT
</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>Interprocedural Optimizations
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>davide@freebsd.org
</td>
</tr>
<tr>
<th>CC</th>
<td>bigcheesegs@gmail.com, llvm-bugs@lists.llvm.org
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</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Testcase:
$ cat test.ll
@.str.47 = private unnamed_addr constant [10 x i8] c"anonymous\00", align 1
define i32 @patatino(i8* nonnull %myptr) {
%blah = call i32 @strcmp(i8* nonnull %myptr, i8* getelementptr inbounds ([10
x i8], [10 x i8]* @.str.47, i64 0, i64 0))
ret i32 %blah
}
declare i32 @strcmp(i8* nocapture, i8* nocapture) local_unnamed_addr
$ ./llvm-extract patatino.ll -func=patatino -S
; ModuleID = 'patatino.ll'
source_filename = "patatino.ll"
@.str.47 = external hidden unnamed_addr constant [10 x i8], align 1
define i32 @patatino(i8* nonnull %myptr) {
%blah = call i32 @strcmp(i8* nonnull %myptr, i8* getelementptr inbounds ([10
x i8], [10 x i8]* @.str.47, i64 0, i64 0))
ret i32 %blah
}
declare i32 @strcmp(i8* nocapture, i8* nocapture) local_unnamed_addr
In the output, @.str.47 should be extracted (found out while reducing an
optimization bug and moving a given function to its own object file, and
observing a link failure because the private string was internalized and the
linker wasn't able to resolve the symbol).</pre>
</div>
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