<table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Issue</th>
<td>
<a href=https://github.com/llvm/llvm-project/issues/110374>110374</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>
firefox fails to build with ICE in src/gl.cc with clang-19
</td>
</tr>
<tr>
<th>Labels</th>
<td>
new issue
</td>
</tr>
<tr>
<th>Assignees</th>
<td>
</td>
</tr>
<tr>
<th>Reporter</th>
<td>
stefson
</td>
</tr>
</table>
<pre>
from the build log, I think this is the error:
```
179:48.20 cargo:warning=fatal error: error in backend: Do not know how to scalarize the result of this operator!
179:48.20 cargo:warning=
179:48.21 cargo:warning=PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script.
179:48.22 cargo:warning=Stack dump:
179:48.33 cargo:warning=0. Program arguments: /usr/lib/llvm/19/bin/armv7a-unknown-linux-musleabihf-clang++-19 -O2 -ffunction-sections -fdata-sections -fPIC --target=armv7a-unknown-linux-musleabihf -I/var/tmp/portage/www-client/firefox-131.0_rc1/work/firefox_build/dist/stl_wrappers -fvisibility=hidden -fvisibility-inlines-hidden -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fstack-protector-strong -DNDEBUG=1 -DTRIMMED=1 -I/var/tmp/portage/www-client/firefox-131.0_rc1/work/firefox_build/dist/include -I/usr/include/nspr -I/usr/include/nss -I/usr/include/nspr -I/var/tmp/portage/www-client/firefox-131.0_rc1/work/firefox_build/dist/include/nss -I/usr/include/libpng16 -I/usr/include/pixman-1 -DMOZILLA_CLIENT -include /var/tmp/portage/www-client/firefox-131.0_rc1/work/firefox_build/mozilla-config.h -mfloat-abi=hard -fno-rtti -pthread -fno-sized-deallocation -fno-aligned-new -ffunction-sections -fdata-sections -fno-math-errno -fno-exceptions -fPIC -pipe -march=armv7-a -mfpu=vfpv3-d16 -mfloat-abi=hard -fomit-frame-pointer -O2 -fomit-frame-pointer -funwind-tables -Wno-error=tautological-type-limit-compare -Wno-invalid-offsetof -Wno-range-loop-analysis -Wno-deprecated-anon-enum-enum-conversion -Wno-deprecated-enum-enum-conversion -Wno-deprecated-this-capture -Wno-inline-new-delete -Wno-error=deprecated-declarations -Wno-error=array-bounds -Wno-error=free-nonheap-object -Wno-error=atomic-alignment -Wno-error=deprecated-builtins -Wno-psabi -Wno-error=builtin-macro-redefined -Wno-vla-cxx-extension -Wno-unknown-warning-option -fno-strict-aliasing -ffp-contract=off -DMOZILLA_CONFIG_H -I /var/tmp/portage/www-client/firefox-131.0_rc1/work/firefox-131.0/gfx/wr/swgl/../webrender/res -I src -I /var/tmp/portage/www-client/firefox-131.0_rc1/work/firefox_build/armv7a-unknown-linux-musleabihf/release/build/swgl-3e66616cdca95a28/out -std=c++17 -fno-exceptions -fno-rtti -fno-math-errno -UMOZILLA_CONFIG_H -ffast-math -mrecip=none -fno-finite-math-only -D_GLIBCXX_USE_CXX11_ABI=0 -o /var/tmp/portage/www-client/firefox-131.0_rc1/work/firefox_build/armv7a-unknown-linux-musleabihf/release/build/swgl-3e66616cdca95a28/out/2e40c9e35e9506f4-gl.o -c src/gl.cc
179:48.33 cargo:warning=1. <eof> parser at end of file
179:48.33 cargo:warning=2. Code generation
179:48.34 cargo:warning=3. Running pass 'Function Pass Manager' on module 'src/gl.cc'.
179:48.35 cargo:warning=4. Running pass 'ARM Instruction Selection' on function '@_ZN25cs_blur_ALPHA_TARGET_frag15swgl_drawSpanR8Ev'
179:48.36 cargo:warning=armv7a-unknown-linux-musleabihf-clang++-19: error: clang frontend command failed with exit code 70 (use -v to see invocation)
179:48.36 cargo:warning=clang version 19.1.0
179:48.36 cargo:warning=Target: armv7a-unknown-linux-musleabihf
179:48.37 cargo:warning=Thread model: posix
179:48.37 cargo:warning=InstalledDir: /usr/lib/llvm/19/bin
179:48.38 cargo:warning=Configuration file: /etc/clang/armv7a-unknown-linux-musleabihf-clang++.cfg
179:48.38 cargo:warning=armv7a-unknown-linux-musleabihf-clang++-19: note: diagnostic msg:
179:48.39 cargo:warning=********************
179:48.39 cargo:warning=
179:48.40 cargo:warning=PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
179:48.40 cargo:warning=Preprocessed source(s) and associated run script(s) are located at:
179:48.41 cargo:warning=armv7a-unknown-linux-musleabihf-clang++-19: note: diagnostic msg: /var/tmp/portage/www-client/firefox-131.0_rc1/temp/gl-a0fb08.cpp
179:48.42 cargo:warning=armv7a-unknown-linux-musleabihf-clang++-19: note: diagnostic msg: /var/tmp/portage/www-client/firefox-131.0_rc1/temp/gl-a0fb08.sh
179:48.42 cargo:warning=armv7a-unknown-linux-musleabihf-clang++-19: note: diagnostic msg:
179:48.43 cargo:warning=
179:48.43 cargo:warning=********************
179:48.43 --- stderr
```
here is the full compressed build log: [build.log.gz](https://github.com/user-attachments/files/17175559/build.log.gz)
and here is the preprocessed sources, and the reproducer: [preprocess.tar.gz](https://github.com/user-attachments/files/17175585/preprocess.tar.gz)
</pre>
<img width="1px" height="1px" alt="" src="http://email.email.llvm.org/o/eJzMWF9v2zrP_zTqjaDAlvP3IhdpE3cBurVoU5y95yagZdrRO1kyJDlp9-kfyE7WLvXOes6zPThA4UYSSf0okiJFcE6WGnFORpdktLyAxu-MnTuPhTP6IjP587ywpqJ-hzRrpMqpMiXhV3RN_U7qL-HrqHQtAVprLEkWlERLEi2O33F0_GuH8WRGksVwOuARpVSALQ1JFgewWuqSJMsCPKgXSe0PKjXNQHxBnYe5paHaePpFmwPdmQP1hjoBCqz8ii0Oi65RnpqiQ2dqtOCNJTx-i-EtgnOauBfn3c1q8bCirskq6SnQrCmpxdpYH_DsvK8dSRaEp4SnpfS7JhsIUxGeKrU__WO1Nf-PwhOeSucadISnFHROpRaqyTtlhAW3a9X3FgSGs68t1tYIdA5z6kxju-nACc4ZIcFjTm2jqRNW1n5wrhLvUejBg_hC86aqA-7vGZKk9wyiAYlmd9aUFioKtmwq1N61DsDTxtmgpsxedI5nhKeZ1ISnYKv9BFijgxU1U1I3T6xqnELI5K5gQoEuCb8k_JLFM8puOWVF0WjhpdHMYfvfUVbk4OH1-G59RRnzYEv0JFn-ZB_K1oSnewhQfVUTngYLQomEp4fDgQklUQf7FNJiYZ5YnMSDaGtFHAiM_fKytG3Dg_A0ly5wOK-2Bwt1jTbg2ksnM6mkfybJcifzHPV3s0xqJTU6dlp73Ka395t1-n_bh9vH-6sVZcuzGZIsw6m4YLjgSh6FN5Y5b40uKVt-Wq4uH69JsowpW27u1x8_rpbd6LcpfXLcdofOA45ThKfa1fZHK-5nLL8T7l8hUDKrdRmP-1dr-VSBZuGAP97-ub65WWyvbtarTxvKTkfxy7FX5qtUCpgwupDlYEdZVSgDnkEmg2-BzSkrtGHWe0lZ7XcW4Tjl5FfMWY6glBEQYqabBxXSQM40Ht4ZZ9qwCvyOobXadGN8Elh_F4e1rJGyCqzYnWKRQcBbNyRZ7ot6n7A8nG2fBqaSnhUWKmS1kdqjPV4DfQtFow9S58xDptBR9kfA0yWRpYfGG2VKKUAx_1wjUzKIEKaqwWJHLPUelMyZKQqH3hTdrAVdIlPG1Aw0qGcnj7JzrC2KcM8y0EYz1E3VfYTRe7SuPdozyncRhZTFBNS-eYEWboZgG5ajQo_fq_eKN0ehwMLRBq-JwFp4ZplpdH62UlhEpo3eIdTMZCEfnbF6U0nRuUi44H-4e3BQL0871w4y-T3tkYBVIKxhFnMspMa8I9oHl356YvjkUb-czOnmPmYdZuoXr3XeSuEDMnAyXHlFUYejDYkyXP6mKF4H5u2ndH29_UDZ-pcFZbcUUnzxFBaDSHcoFeHpYBAmMLOocwzzNvjlmjorfiWCb9fCTzJdC0AhuLDHiSdAZQmOx-N4LHIBsxHwKeGpaTxlzuckWYouCceTnhj_dsec3waPb8-8KMD5loiyyqKQNUmW2mjsuAuppcdOiNHqOWS765v15dXnz9vHh9X26vPnON4uLteh7KDM_OvPj_CU4zASM0xGOBtF42LISjUwlIngAsFl1ECI9xVacSi0SHKFpiDJitZgHVoKnqLOQ5lbSIXvk8SDpCuTIy1RY3dVnHMOe_iSwHff6DCkNThHCZ-kxzxB78LER9BQBk-fUKNpZfJGhew3ea0tn5zXosmoF-ewb7_F_Ue61s7bptv2AVWXkI57nvJWoCXDaPvnJz4Sbpupxm4XN3cfFtvN4v56tdkWFsp4FKy3zS0cHmrQ99PVPrCdoRv3YPt7teu3V0z40S7Rwhrtg-mEqapQtRcgFeb0IP2O4pP0VAQLTSJK-LRxSNm-feQgUqn3x8RN-Owt2L6j7PY8pZt4Ngg31jvU3Bxr6AX9WWicCZv0CeuKkMrkqILI2jj59JaxD3-wOCiF-VLad7wtzmROe2VetbVT0_l_Fz6dZPTBWY8W_DuvlIEoyrd7_wrn0ca36HIJpTbOS0ErV_Y80ma9qhK--Od_b3b46XN52P-sPz6XF5vN4uoD3XxY0fT25ub2j_Wna5qub1YPdHPbTl8-XtP71d3t_eathj-S3fccnjrCZz9-En8jsEjbUhhzCr5ny_j32vC_yGMeW45SMYiKLJoORF2fo-976P9L0bvd_xj8-Xb9CfMt1W8NsRYFY4w6n6O1vS207rtDi6fGW9EoFZJJbbsgeOnUBRuNLtvxQJlyUH4loyXh079oUDUOLQPvQey6fk4woGqbU_EknoxGo9mpBDqJPKWi7huC7jW6nnaVO_WrunZdbU3eCLRHuC8MAw_2l2CejoJ7vpHLZxf5PMlnyQwucB5P-GQ0jKfD0cVuHiPG8WSazSCacDGMR1nOCyEmGE2TcTYWF3LOIz6MZnwaj4fDaDTAWVzAmMejCR9lExGRYYQVSDUIKWpgbHnRdvnmcRwlk-GFggyVazuvnIeHd7tKOCej5YWdtw3CrCkdGUZKOu9exHjpFc6PUdUWDy7UB53V2yJifbWiUr8uNLv5NjxYPKMXjVXzf96lPKqwn_P_BAAA__-yGSq1">