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rust / llvm-project / add00bcbad74c6191362b571c3a5f2fb9224f711
commitadd00bcbad74c6191362b571c3a5f2fb9224f711[log] [tgz]
authorNikita Popov <npopov@redhat.com>Mon Jan 08 10:21:25 2024 +0100
committerNikita Popov <npopov@redhat.com>Tue Jan 09 12:12:04 2024 +0100
tree49601777671cb21b94e772d8f1c12490d98b0332
parent2409b7624bfd50a3a10ab425514d1d694973416f [diff]
[MSSA] Don't require clone creation to succeed (#76819)

Sometimes, we create a MemoryAccess for an instruction, which is later
simplified (e.g. via devirtualization) such that the new instruction has
no memory effects anymore.

If we later clone the instruction (e.g. during unswitching), then MSSA
will not create a MemoryAccess for the new instruction, triggering an
assert.

Disable the assertion (by passing CreationMustSucceed=false) and adjust
getDefiningAccessForClone() to work correctly in that case.

This PR implements the alternative suggestion by alinas from
https://github.com/llvm/llvm-project/pull/76142.

(cherry picked from commit d02c7931d1be794a230943e300fec4172032e6a8)
2 files changed
tree: 49601777671cb21b94e772d8f1c12490d98b0332
  1. .ci/
  2. .github/
  3. bolt/
  4. clang/
  5. clang-tools-extra/
  6. cmake/
  7. compiler-rt/
  8. cross-project-tests/
  9. flang/
  10. libc/
  11. libclc/
  12. libcxx/
  13. libcxxabi/
  14. libunwind/
  15. lld/
  16. lldb/
  17. llvm/
  18. llvm-libgcc/
  19. mlir/
  20. openmp/
  21. polly/
  22. pstl/
  23. runtimes/
  24. third-party/
  25. utils/
  26. .arcconfig
  27. .arclint
  28. .clang-format
  29. .clang-tidy
  30. .git-blame-ignore-revs
  31. .gitignore
  32. .mailmap
  33. CONTRIBUTING.md
  34. LICENSE.TXT
  35. README.md
  36. SECURITY.md
README.md

The LLVM Compiler Infrastructure

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