[qt/clang/llvm]: Summary of bulk changes made

Git repository change summary for qt/clang/llvm
Pushed by mirror-service into branch 'upstream/users/hulxv/compiler_rt/builtins/cmp-helper'.
Changed from 437bd2e11374ccda41a8af76df821d0ff4cfdff8 to e2564f080a20d3872e009e750007cf4dbbf34358
Acknowledgement was received that this change introduces only existing code that has been pushed to another public open source repository.

This change contains the following new commits:

Git commit bd9aa3ca5789c94b3a0d0c42b0aa8a94be4c0695 by GitHub (on behalf of Fangrui Song) on 01/08/2026 at 17:55..
[ELF] Retain .rela.dyn for PPC64 PI long-branch thunks (#212078)

PPC64PILongBranchThunk adds a relative relocation, which runs after
removeUnusedSyntheticSections. With no other dynamic relocation
.rela.dyn is incorrectly removed.

Extract the .rela.auth.dyn condition (#96496, #195649) to `mayGrowLate`
and add a .branch_lt check.
https://invent.kde.org/qt/clang/llvm/-/commit/bd9aa3ca5789c94b3a0d0c42b0aa8a94be4c0695

Git commit 6545f29f64373d98ab093b059a00f3272efb59bc by GitHub (on behalf of Florian Hahn) on 01/08/2026 at 18:09..
[IR] Truncate struct field offsets exceeding the pointer index width. (#213436)

Update accumulateConstantOffset and collectOffset to implicitly truncate
struct field offsets. This fixes crashes in the new tests, where the
field offset does not fit in the index width.

PR: https://github.com/llvm/llvm-project/pull/213436
https://invent.kde.org/qt/clang/llvm/-/commit/6545f29f64373d98ab093b059a00f3272efb59bc

Git commit 8fd4c22272d5bffa64b45158cf308623d6c7ea07 by hulxv on 01/08/2026 at 18:28..
[libc][builtins] add cmp_helper for compiler-rt soft-float comparisons
https://invent.kde.org/qt/clang/llvm/-/commit/8fd4c22272d5bffa64b45158cf308623d6c7ea07

Git commit e2564f080a20d3872e009e750007cf4dbbf34358 by hulxv on 01/08/2026 at 18:28..
fix format
https://invent.kde.org/qt/clang/llvm/-/commit/e2564f080a20d3872e009e750007cf4dbbf34358