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llvm / llvm-project / b1dcf78378aaded19b47886cece991cee3441207
commitb1dcf78378aaded19b47886cece991cee3441207[log] [tgz]
authorFeng Zou <feng.zou@intel.com>Tue Jun 24 14:22:14 2025 +0800
committerGitHub <noreply@github.com>Tue Jun 24 14:22:14 2025 +0800
treecdc8a0046298df1254b6e81df668b6f02475c3a7
parentef048471f70143b4c0505dff10828a5b7e3a4ec4 [diff]
[X86][APX] Fix issue of push2/pop2 instr with stack clash protection (#145303)

When -stack-clash-protection option is specified and APX push2pop2 is
enabled, there will be two calls to emitSPUpdate function which emits
two STACKALLOC_W_PROBING pseudo instructions. The pseudo instruction for
push2 padding is silently ignored which leads to the stack misaligned to
16 bytes and GP exception in runtime. Fixed by directly emitting "push
%rax" instruction for push2 padding, instead of calling emitSPUpdate.
There was a similar issue on https://reviews.llvm.org/D150033.
2 files changed
tree: cdc8a0046298df1254b6e81df668b6f02475c3a7
  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. pstl/
  25. runtimes/
  26. third-party/
  27. utils/
  28. .clang-format
  29. .clang-format-ignore
  30. .clang-tidy
  31. .git-blame-ignore-revs
  32. .gitattributes
  33. .gitignore
  34. .mailmap
  35. CODE_OF_CONDUCT.md
  36. CONTRIBUTING.md
  37. LICENSE.TXT
  38. pyproject.toml
  39. README.md
  40. SECURITY.md
README.md

The LLVM Compiler Infrastructure

OpenSSF Scorecard OpenSSF Best Practices libc++

Welcome to the LLVM project!

This repository contains the source code for LLVM, a toolkit for the construction of highly optimized compilers, optimizers, and run-time environments.

The LLVM project has multiple components. The core of the project is itself called “LLVM”. This contains all of the tools, libraries, and header files needed to process intermediate representations and convert them into object files. Tools include an assembler, disassembler, bitcode analyzer, and bitcode optimizer.

C-like languages use the Clang frontend. This component compiles C, C++, Objective-C, and Objective-C++ code into LLVM bitcode -- and from there into object files, using LLVM.

Other components include: the libc++ C++ standard library, the LLD linker, and more.

Getting the Source Code and Building LLVM

Consult the Getting Started with LLVM page for information on building and running LLVM.

For information on how to contribute to the LLVM project, please take a look at the Contributing to LLVM guide.

Getting in touch

Join the LLVM Discourse forums, Discord chat, LLVM Office Hours or Regular sync-ups.

The LLVM project has adopted a code of conduct for participants to all modes of communication within the project.