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

Git repository change summary for qt/clang/llvm
Pushed by mirror-service into branch 'upstream/users/lukel97/loop-vectorize/simplifyRecipes-worklist'.
Changed from 64fa13322ac9fe9f3a3f4d78c22520031fba25c0 to f5f9e87384e8272a4611ed7273947457426c9923
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 34323ab08e6eed2caff556ecdeae20053cbaaae7 by GitHub (on behalf of Jonas Devlieghere) on 07/08/2026 at 05:21..
[lldb] Fix the lazy initialization of Module's global collections (NFC) (#214630)

Both collections were initialized with a check-then-set on a null
pointer, which is race-y. We can achieve the same thing by initializing
the pointer with the allocation, while retaining the leak.
https://invent.kde.org/qt/clang/llvm/-/commit/34323ab08e6eed2caff556ecdeae20053cbaaae7

Git commit fab90faf86a5846f7ed73c1caf322dcc79a6af5e by GitHub (on behalf of Kane Wang) on 07/08/2026 at 05:36..
[RISCV][GlobalISel] Legalize G_LROUND/G_LLROUND (#213889)

Add legalizer rules so `llvm.lround/llround` lower to`
fcvt.{w,l}.{h,s,d}` with FRM_RMM.
https://invent.kde.org/qt/clang/llvm/-/commit/fab90faf86a5846f7ed73c1caf322dcc79a6af5e

Git commit 424588ce0a14c9a310687424d8f0318553ef3fa7 by GitHub (on behalf of Sam Elliott) on 07/08/2026 at 05:41..
[AsmPrinter] Emit type and size for Constant Pool Entries (#214387)
https://invent.kde.org/qt/clang/llvm/-/commit/424588ce0a14c9a310687424d8f0318553ef3fa7

Git commit 5c3123a6ae4953762b90821ddcdcbd7f4c4cd557 by Luke Lau on 07/08/2026 at 05:43..
[VPlan] Make simplifyRecipe more like InstCombine

Most combines in simplifyRecipe RAUW a value, but not all of them erase the old recipe.
Unify them and bring it in line with InstCombine by having it return a VPValue, which simplifyRecipes can then call RAUW with, and automatically erase the old recipe.

Similarly to InstCombine, combines that modify a recipe should return the same recipe.
https://invent.kde.org/qt/clang/llvm/-/commit/5c3123a6ae4953762b90821ddcdcbd7f4c4cd557

Git commit e723bdfdef3da9a787d553efd07783a6fc5aec12 by Luke Lau on 07/08/2026 at 05:43..
Update trunc combine, fix m_Not return position
https://invent.kde.org/qt/clang/llvm/-/commit/e723bdfdef3da9a787d553efd07783a6fc5aec12

Git commit a6b2f97f127760840f8f724206c7c0ddc83907d3 by Luke Lau on 07/08/2026 at 05:43..
Precommit test
https://invent.kde.org/qt/clang/llvm/-/commit/a6b2f97f127760840f8f724206c7c0ddc83907d3

Git commit f5f9e87384e8272a4611ed7273947457426c9923 by Luke Lau on 07/08/2026 at 05:43..
[VPlan] Process simplifyRecipes in a worklist

This brings simplifyRecipes further in line with InstCombine, and asides from unlocking more simplifications it also helps avoid spurious test churn whenever passes are moved around simplifyRecipes.

For now just push the new recipe onto the worklist, not its users.
This uses a post order traversal so we maintain the same simplification order as before.

I've gone through and checked every simplification we do is a canonicalisation that converges, and I checked on llvm-test-suite + SPEC CPU 2017 in various configurations that we don't hit any cycles.
https://invent.kde.org/qt/clang/llvm/-/commit/f5f9e87384e8272a4611ed7273947457426c9923