[llvm] [DAG] Fold extract_subvector(insert_subvector(x, y, c1), c2) --> extract_subvector(y,c2-c1) (PR #87925)

[antoine moynault via llvm-commits]

antmox wrote:

Hello @RKSimon,

It looks like this patch broke clang-aarch64-sve-vls bot :
https://lab.llvm.org/buildbot/#/builders/184/builds/11650

The bot is still broken with the latest commit : 
https://lab.llvm.org/buildbot/#/builders/184/builds/11655

The compilation of the following testsuite source files seems to be stuck:
- MultiSource/Applications/sgefa/driver.c
- MultiSource/Applications/hbd/d9-swtch.cpp
- MultiSource/Benchmarks/ASC_Sequoia/AMGmk/csr_matvec.c
- MultiSource/Benchmarks/Prolangs-C/football/common.c
- MultiSource/Benchmarks/MallocBench/gs/gdevmem.c
- MultiSource/Benchmarks/nbench/nbench1.c
- MultiSource/Benchmarks/Prolangs-C/TimberWolfMC/makesite.c
- MultiSource/Benchmarks/tramp3d-v4/tramp3d-v4.cpp
- MultiSource/Benchmarks/DOE-ProxyApps-C/SimpleMOC/tracks.c
- SingleSource/Benchmarks/Adobe-C++/simple_types_loop_invariant.cpp
- MultiSource/Benchmarks/mafft/Halignmm.c
- MultiSource/Benchmarks/mafft/partQalignmm.c
- MultiSource/Benchmarks/mafft/partSalignmm.c
- MultiSource/Benchmarks/mafft/Qalignmm.c
- MultiSource/Benchmarks/mafft/Ralignmm.c
- MultiSource/Benchmarks/mafft/Salignmm.c

Could you please look at this ?

https://github.com/llvm/llvm-project/pull/87925