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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 - LLVM ERROR: Cannot select: intrinsic %llvm.ppc.altivec.dss"
href="https://bugs.llvm.org/show_bug.cgi?id=43072">43072</a>
</td>
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<tr>
<th>Summary</th>
<td>LLVM ERROR: Cannot select: intrinsic %llvm.ppc.altivec.dss
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
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<th>Version</th>
<td>8.0
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</td>
</tr>
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<th>OS</th>
<td>Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>release blocker
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>LLVM Codegen
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>elvis.dowson@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org, neeilans@live.com, richard-llvm@metafoo.co.uk
</td>
</tr></table>
<p>
<div>
<pre>I tried to compile SDL2 library from sources on an IBM Power9 system, using
clang-8.0.1 built from the 8.0 branch.
The options passed for building the library are as follows:
```bash
cmake -DCMAKE_BUILD_TYPE=Debug -DVIDEO_MIR=OFF -DVIDEO_KMSDRM=OFF
-DSDL_STATIC=ON -DEXTRA_CFLAGS='-gdwarf-4 -fpic -mabi=altivec -mvsx -maltivec
-mpower9-vector' -DEXTRA_LDFLAGS='-fpic' ${ARCH_OPTIONS} ../$SDL_DIR
e
```
I went through the debugging process and narrowed it down to a code generator
bug.
When I run the command
```
llc ./build-SDL-gui-backend-Debug/SDL_blit_N.bc
LLVM ERROR: Cannot select: intrinsic %llvm.ppc.altivec.dss
llc ./build-SDL-gui-backend-Debug/SDL_blit_N.bc -relocation-model=pic
LLVM ERROR: Cannot select: intrinsic %llvm.ppc.altivec.dss
llc ./build-SDL-gui-backend-Debug/SDL_blit_N.bc -relocation-model=static
LLVM ERROR: Cannot select: intrinsic %llvm.ppc.altivec.dss
```
Here is the output of the build process:
```bash
13 warnings generated.
fatal error: error in backend: Cannot select: intrinsic %llvm.ppc.altivec.dss
clang-8: error: clang frontend command failed with exit code 70 (use -v to see
invocation)
clang version 8.0.1
Target: powerpc64le-unknown-linux-gnu
Thread model: posix
InstalledDir: /usr/local/bin
clang-8: note: diagnostic msg: PLEASE submit a bug report to
<a href="https://bugs.llvm.org/">https://bugs.llvm.org/</a> and include the crash backtrace, preprocessed source,
and associated run script.
clang-8: note: diagnostic msg:
********************
PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang-8: note: diagnostic msg: /tmp/SDL_blit_N-ca38a1.c
clang-8: note: diagnostic msg: /tmp/SDL_blit_N-ca38a1.sh
clang-8: note: diagnostic msg:
********************
```</pre>
</div>
</p>
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