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

Git repository change summary for qt/clang/llvm
Pushed by mirror-service into branch 'upstream/users/arsenm/x86/use-ProcessorAlias'.
Changed from fc3c7025768889b2cfc82c13e6fe60bc235a313d to 790c44cfd932ad908868f2ee9b742f1b21de428c
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 4792e5407dca4738bac3adab0d0bb0fd562b9e96 by Matt Arsenault on 25/07/2026 at 06:17..
TableGen: Add first class support for processor aliases

Previously isCPUStringValid was virtual so TableGen could emit an
AArch64 specific hack for recognizing cpu aliases. Teach tablegen
about aliases, and insert each alias into the CPU subtype table as its
own entry (sorted by name, carrying the canonical processor's features
and scheduling model).

There is further opportunity for code sharing improvements. AArch64's
aliases are consumed by ARMTargetDefEmitter to emit a custom inc file
in TargetParser which should be universalized.

Co-authored-by: Claude (Claude-Opus-4.8) <[email protected]>
https://invent.kde.org/qt/clang/llvm/-/commit/4792e5407dca4738bac3adab0d0bb0fd562b9e96

Git commit 5fb49102f2441fc4f29495b2d72769f5b21f101c by Matt Arsenault on 25/07/2026 at 06:17..
X86: Use ProcessorAlias for duplicated processor names

Many X86 processors were defined multiple times under different names,
emitting an identical ProcessorModel for each spelling and duplicating
the feature masks, tune features, and scheduling model index in the subtype
table.

Define each processor once under its canonical name and express the
alternate spellings with ProcessorAlias, using the tablegen alias
mechanism. This deduplicates the redundant subtype table entries and saves
about 4.6k with the new alias table.

Co-Authored-By: Claude (Claude-Opus-4.8) <[email protected]>
https://invent.kde.org/qt/clang/llvm/-/commit/5fb49102f2441fc4f29495b2d72769f5b21f101c

Git commit 790c44cfd932ad908868f2ee9b742f1b21de428c by Matt Arsenault on 25/07/2026 at 06:17..
pentium alias
https://invent.kde.org/qt/clang/llvm/-/commit/790c44cfd932ad908868f2ee9b742f1b21de428c