Cherry pick #105048 to 26.4: JIT: register __fixunssfti / __fixunsdfti for toUInt128(Float)#105097
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robot-clickhouse-ci-1 merged 3 commits intoMay 16, 2026
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The JIT symbol resolver was registering only the signed 128-bit float-to-int compiler-rt builtins (__fixsfti, __fixdfti). When LLVM lowered `fptoui` to a 128-bit integer (e.g. toUInt128 of a Float expression), it emitted calls to __fixunssfti / __fixunsdfti, which were never registered, so the JIT linker failed with `CANNOT_COMPILE_CODE Could not find symbol __fixunsdfti` as soon as the expression got hot enough to be compiled. Add the missing unsigned variants, plus __udivti3 / __umodti3 so every libcall in the resolver now has both signed and unsigned entries, and document the signed/unsigned-pair rule in a comment so the asymmetry that caused this bug is not reintroduced. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
JIT: register __fixunssfti / __fixunsdfti for toUInt128(Float)
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Original pull-request #105048
Do not merge this PR manually
This pull-request is a first step of an automated backporting.
It contains changes similar to calling
git cherry-picklocally.If you intend to continue backporting the changes, then resolve all conflicts if any.
Otherwise, if you do not want to backport them, then just close this pull-request.
The check results does not matter at this step - you can safely ignore them.
Troubleshooting
If the conflicts were resolved in a wrong way
If this cherry-pick PR is completely screwed by a wrong conflicts resolution, and you want to recreate it:
pr-cherrypicklabel from the PRYou also need to check the Original pull-request for
pr-backports-createdlabel, and delete if it's presented thereThe PR source
The PR is created in the CI job