[PATCH] D68720: Support -fstack-clash-protection for x86

[serge via Phabricator via cfe-commits]

serge-sans-paille updated this revision to Diff 225462.
serge-sans-paille added a comment.

Moved the implementation to a specialization of `emitStackProbeInline` that used to be Windows-centric. Provide a generic implementation that generates inline assembly instead. that way we don't clutter existing functions, and only add a new case to `emitSPUpdate`.

Handle large stack allocation with a loop instead of a (large) basic block.

@rnk: this is far less intrusive and more integrated to the existing structure, thanks a lot for hinting in that direction.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D68720/new/

https://reviews.llvm.org/D68720

Files:
  clang/docs/ReleaseNotes.rst
  clang/include/clang/Basic/CodeGenOptions.def
  clang/include/clang/Basic/DiagnosticFrontendKinds.td
  clang/include/clang/Basic/TargetInfo.h
  clang/include/clang/Driver/CC1Options.td
  clang/include/clang/Driver/Options.td
  clang/lib/Basic/Targets/X86.h
  clang/lib/CodeGen/CGStmt.cpp
  clang/lib/CodeGen/CodeGenModule.cpp
  clang/lib/Driver/ToolChains/Clang.cpp
  clang/lib/Frontend/CompilerInvocation.cpp
  clang/test/CodeGen/stack-clash-protection.c
  clang/test/Driver/stack-clash-protection.c
  llvm/docs/ReleaseNotes.rst
  llvm/include/llvm/CodeGen/TargetLowering.h
  llvm/lib/Target/X86/X86CallFrameOptimization.cpp
  llvm/lib/Target/X86/X86FrameLowering.cpp
  llvm/lib/Target/X86/X86FrameLowering.h
  llvm/lib/Target/X86/X86ISelLowering.cpp
  llvm/lib/Target/X86/X86ISelLowering.h
  llvm/lib/Target/X86/X86InstrCompiler.td
  llvm/lib/Target/X86/X86InstrInfo.td
  llvm/test/CodeGen/X86/stack-clash-dynamic-alloca.ll
  llvm/test/CodeGen/X86/stack-clash-large.ll
  llvm/test/CodeGen/X86/stack-clash-medium-natural-probes.ll
  llvm/test/CodeGen/X86/stack-clash-medium.ll
  llvm/test/CodeGen/X86/stack-clash-no-free-probe.ll
  llvm/test/CodeGen/X86/stack-clash-small.ll

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