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

Git repository change summary for qt/clang/llvm-project
Pushed by mirror-service into branch 'upstream/users/cdevadas/make-AMDGPURewriteAGPRCopyMFMA-subreg-reload-aware'.
Changed from a8e52977d7383770d2864d5afe2769993bdb86b4 to 2a5c8c9adfb79219e6a07bf6780c2c7daa5e8a9b
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 19a7d30a4936a05af0e92be7082db0106066bc84 by Aaditya (on behalf of Christudasan Devadasan) on 30/07/2026 at 06:10..
[AMDGPU] Introduce Offset field in SGPR spill Pseudos

Currently, SGPR spill pseudo-instructions lack
an offset field to represent non-zero stack offsets.
This patch introduces an additional offset field to
SGPR spill pseudo-instructions and updates all
relevant passes that handle spill lowering to support
this new field. This field is essential for a future
patch that implements subreg reload of tuple registers
from their stack location during RA.
https://invent.kde.org/qt/clang/llvm-project/-/commit/19a7d30a4936a05af0e92be7082db0106066bc84

Git commit e656f3036ad6a4793bdc27bb855636dc01538ba9 by Aaditya (on behalf of Christudasan Devadasan) on 30/07/2026 at 06:10..
incorporated review comments.
https://invent.kde.org/qt/clang/llvm-project/-/commit/e656f3036ad6a4793bdc27bb855636dc01538ba9

Git commit 76d90cd95bbd9b968a5a4f6e1190e58455fc7006 by Aaditya (on behalf of Christudasan Devadasan) on 30/07/2026 at 06:20..
[AMDGPU] Make getNumSubRegsForSpillOp externally available (NFC).
https://invent.kde.org/qt/clang/llvm-project/-/commit/76d90cd95bbd9b968a5a4f6e1190e58455fc7006

Git commit bc1cf7619e13569da0809968f52963d2a9f96810 by Aaditya (on behalf of Christudasan Devadasan) on 30/07/2026 at 06:26..
moved the implementation to SIInstrInfo.
https://invent.kde.org/qt/clang/llvm-project/-/commit/bc1cf7619e13569da0809968f52963d2a9f96810

Git commit 836607c70fa77dcc960e30d4ecd7ced2c67ff084 by Aaditya (on behalf of Christudasan Devadasan) on 30/07/2026 at 06:26..
fixed a comment.
https://invent.kde.org/qt/clang/llvm-project/-/commit/836607c70fa77dcc960e30d4ecd7ced2c67ff084

Git commit c2eb408cf1e7ddab8a92c4f5310a233210d06df0 by Aaditya (on behalf of Christudasan Devadasan) on 30/07/2026 at 06:26..
[AMDGPU] Make AMDGPURewriteAGPRCopyMFMA aware of subreg reload

AMDGPURewriteAGPRCopyMFMA pass is currently not subreg-aware.
In particular, the logic that optimizes spills into COPY
instructions assumes full register reloads. This becomes
problematic when the reload instruction partially restores
a tuple register. This patch introduces the necessary changes
to make this pass subreg-aware, for a future patch that
implements subreg reload during RA.
https://invent.kde.org/qt/clang/llvm-project/-/commit/c2eb408cf1e7ddab8a92c4f5310a233210d06df0

Git commit 5227fe6e892f4f108401604fbe563fe32055914c by Aaditya (on behalf of Christudasan Devadasan) on 30/07/2026 at 06:26..
suggestions incorporated.
https://invent.kde.org/qt/clang/llvm-project/-/commit/5227fe6e892f4f108401604fbe563fe32055914c

Git commit 2a5c8c9adfb79219e6a07bf6780c2c7daa5e8a9b by Aaditya on 31/07/2026 at 08:57..
Fix Merge conflict from rebasing.
https://invent.kde.org/qt/clang/llvm-project/-/commit/2a5c8c9adfb79219e6a07bf6780c2c7daa5e8a9b