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llvm/llvm-project/458a2e88cc0595e5456e37cdfbec9bd84d5e2dee
commit
458a2e88cc0595e5456e37cdfbec9bd84d5e2dee
[log]
author
Thurston Dang <thurston@google.com>
Tue Jan 13 10:14:32 2026 -0800
committer
GitHub <noreply@github.com>
Tue Jan 13 10:14:32 2026 -0800
tree
af46447cf721c25806a5e59e59c1dda4f26b77e5
parent
c752e12b7622d0ee3483148620fd9d4e97055a3b [diff]
[AMDGPU][Scheduler] Fix use-after-poison by printing before deleting (#175807)

A buildbot was failing with a use-after-poison
(https://lab.llvm.org/buildbot/#/builders/24/builds/16530) after
https://github.com/llvm/llvm-project/pull/175050:
```
==llc==1532559==ERROR: AddressSanitizer: use-after-poison on address 0xe26e74e12368 at pc 0xb36d41bd74dc bp 0xffffed72a450 sp 0xffffed72a448
READ of size 8 at 0xe26e74e12368 thread T0
    #0 0xb36d41bd74d8 in llvm::MachineInstr::print(llvm::raw_ostream&, bool, bool, bool, bool, llvm::TargetInstrInfo const*) const /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/llvm/lib/CodeGen/MachineInstr.cpp:1796:35
    #1 0xb36d3e221b08 in operator<< /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/llvm/include/llvm/CodeGen/MachineInstr.h:2150:6
    #2 0xb36d3e221b08 in llvm::PreRARematStage::rollback(llvm::PreRARematStage::RollbackInfo const&, llvm::BitVector&) const /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/llvm/lib/Target/AMDGPU/GCNSchedStrategy.cpp:2363:57
...
```

This is because it was printing an instruction that had already been
deleted. This patch fixes this by reversing the order.
1 file changed
tree: af46447cf721c25806a5e59e59c1dda4f26b77e5
  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. libsycl/
  16. libunwind/
  17. lld/
  18. lldb/
  19. llvm/
  20. llvm-libgcc/
  21. mlir/
  22. offload/
  23. openmp/
  24. orc-rt/
  25. polly/
  26. runtimes/
  27. third-party/
  28. utils/
  29. .clang-format
  30. .clang-format-ignore
  31. .clang-tidy
  32. .git-blame-ignore-revs
  33. .gitattributes
  34. .gitignore
  35. .mailmap
  36. CODE_OF_CONDUCT.md
  37. CONTRIBUTING.md
  38. LICENSE.TXT
  39. pyproject.toml
  40. README.md
  41. SECURITY.md
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