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<head>
<base href="https://bugs.llvm.org/">
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - clangd indexing broken for bazel compilation database"
href="https://bugs.llvm.org/show_bug.cgi?id=50742">50742</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>clangd indexing broken for bazel compilation database
</td>
</tr>
<tr>
<th>Product</th>
<td>clang-tools-extra
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>clangd
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>llvm@wkenyon.net
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>Hey, bazel produces a compilation database with commands that compile fine with
clang, but do not index properly with clangd-indexer (or background indexing
with clangd).
For example, if you create these two files in /tmp/reproduce
`hello-world.cc`
```
#include <iostream>
#include <x86intrin.h>
int main(int argc, char** argv) {
std::cout << "Hello world" << std::endl;
return 0;
}
```
`compile_commands.json`
```
[
{"command":"/usr/bin/clang -Wall -fno-omit-frame-pointer -std=c++17 -iquote .
-I /usr/lib/llvm-6.0/lib/clang/6.0.0/include -I /usr/include -I
/usr/include/c++/7 -I /usr/include/x86_64-linux-gnu/c++/7 -I
/usr/include/c++/7/backward -x c++ -c hello-world.cc",
"directory":"/tmp/reproduce", "file":"hello-world.cc"}
```
Then run the following commands:
```
will@will-desktop:/tmp/reproduce$ /usr/bin/clang -Wall -fno-omit-frame-pointer
-std=c++17 -iquote . -I /usr/lib/llvm-6.0/lib/clang/6.0.0/include -I
/usr/include -I /usr/include/c++/7 -I /usr/include/x86_64-linux-gnu/c++/7 -I
/usr/include/c++/7/backward -x c++ -c hello-world.cc
will@will-desktop:/tmp/reproduce$ ~/llvm-project/build/bin/clangd-indexer
--executor=all-TUs compile_commands.json > /dev/null
[1/1] Processing file /home/will/examples/cpp-tutorial/stage1/hello-world.cc
In file included from hello-world.cc:2:
In file included from /usr/lib/llvm-6.0/lib/clang/6.0.0/include/x86intrin.h:29:
In file included from /usr/lib/llvm-6.0/lib/clang/6.0.0/include/immintrin.h:32:
/usr/lib/llvm-6.0/lib/clang/6.0.0/include/xmmintrin.h:1900:3: error: use of
undeclared identifier '__builtin_ia32_storehps'
__builtin_ia32_storehps((__v2si *)__p, (__v4sf)__a);
^
/usr/lib/llvm-6.0/lib/clang/6.0.0/include/xmmintrin.h:1917:3: error: use of
undeclared identifier '__builtin_ia32_storelps'
__builtin_ia32_storelps((__v2si *)__p, (__v4sf)__a);
^
In file included from hello-world.cc:2:
In file included from /usr/lib/llvm-6.0/lib/clang/6.0.0/include/x86intrin.h:29:
In file included from /usr/lib/llvm-6.0/lib/clang/6.0.0/include/immintrin.h:32:
In file included from
/usr/lib/llvm-6.0/lib/clang/6.0.0/include/xmmintrin.h:2969:
/usr/lib/llvm-6.0/lib/clang/6.0.0/include/emmintrin.h:3427:10: error: use of
undeclared identifier '__builtin_ia32_cvtdq2ps'; did you mean
'__builtin_ia32_cvtpd2ps'?
return __builtin_ia32_cvtdq2ps((__v4si)__a);
^~~~~~~~~~~~~~~~~~~~~~~
__builtin_ia32_cvtpd2ps
/usr/lib/llvm-6.0/lib/clang/6.0.0/include/emmintrin.h:1309:10: note:
'__builtin_ia32_cvtpd2ps' declared here
return __builtin_ia32_cvtpd2ps((__v2df)__a);
^
In file included from hello-world.cc:2:
In file included from /usr/lib/llvm-6.0/lib/clang/6.0.0/include/x86intrin.h:29:
In file included from /usr/lib/llvm-6.0/lib/clang/6.0.0/include/immintrin.h:66:
/usr/lib/llvm-6.0/lib/clang/6.0.0/include/avxintrin.h:2228:18: error: use of
undeclared identifier '__builtin_ia32_cvtdq2ps256'; did you mean
'__builtin_ia32_cvtpd2ps256'?
return (__m256)__builtin_ia32_cvtdq2ps256((__v8si) __a);
...
```
You can see that clang compiles the file successfully, but clangd can't index
it.
Thanks,
Will</pre>
</div>
</p>
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