[DirectX] Move the scalarizer pass to before dxil-flatten-arrays (#146800)

Fixes #145924 and #140416
Depends on #146173 being merged first.

This PR moves the scalarizer pass to immediately before the
dxil-flatten-arrays pass to allow the dxil-flatten-arrays pass to turn
scalar GEPs (including i8 GEPs) into flattened array GEPs where
applicable.

A number of LLVM DirectX CodeGen tests have been edited to remove scalar
GEPs and also correct previously uncaught incorrectly-transformed GEPs.

No more validation errors of the form `Access to out-of-bounds memory is
disallowed` or `TGSM pointers must originate from an unambiguous TGSM
global variable` appear anymore after this PR when compiling DML
shaders.
5 files changed
tree: c79a23b0448fa335e71994362faa84ba5febf93c
  1. .ci/
  2. .github/
  3. bolt/
  4. clang/
  5. clang-tools-extra/
  6. cmake/
  7. compiler-rt/
  8. cross-project-tests/
  9. flang/
  10. flang-rt/
  11. libc/
  12. libclc/
  13. libcxx/
  14. libcxxabi/
  15. libunwind/
  16. lld/
  17. lldb/
  18. llvm/
  19. llvm-libgcc/
  20. mlir/
  21. offload/
  22. openmp/
  23. polly/
  24. runtimes/
  25. third-party/
  26. utils/
  27. .clang-format
  28. .clang-format-ignore
  29. .clang-tidy
  30. .git-blame-ignore-revs
  31. .gitattributes
  32. .gitignore
  33. .mailmap
  34. CODE_OF_CONDUCT.md
  35. CONTRIBUTING.md
  36. LICENSE.TXT
  37. pyproject.toml
  38. README.md
  39. SECURITY.md
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