[all-commits] [llvm/llvm-project] 5cac27: [LoongArch] Add `-fstack-clash-protection` support...

[CSharperMantle via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 5cac2751fb9cf3112d16717b278e40d07dd6cfdc
      https://github.com/llvm/llvm-project/commit/5cac2751fb9cf3112d16717b278e40d07dd6cfdc
  Author: Rong "Mantle" Bao <rong.bao at csmantle.top>
  Date:   2026-05-28 (Thu, 28 May 2026)

  Changed paths:
    M clang/lib/Driver/ToolChains/Clang.cpp
    M clang/test/CodeGen/stack-clash-protection.c
    M llvm/lib/Target/LoongArch/LoongArchFrameLowering.cpp
    M llvm/lib/Target/LoongArch/LoongArchFrameLowering.h
    M llvm/lib/Target/LoongArch/LoongArchISelLowering.cpp
    M llvm/lib/Target/LoongArch/LoongArchISelLowering.h
    M llvm/lib/Target/LoongArch/LoongArchInstrInfo.td
    M llvm/lib/Target/LoongArch/LoongArchMachineFunctionInfo.h
    M llvm/test/CodeGen/LoongArch/inline-asm-constraint-f.ll
    A llvm/test/CodeGen/LoongArch/stack-clash-prologue-nounwind.ll
    A llvm/test/CodeGen/LoongArch/stack-clash-prologue.ll
    A llvm/test/CodeGen/LoongArch/stack-probing-dynamic-nonentry.ll
    A llvm/test/CodeGen/LoongArch/stack-probing-dynamic.ll
    A llvm/test/CodeGen/LoongArch/stack-probing-frame-setup.mir

  Log Message:
  -----------
  [LoongArch] Add `-fstack-clash-protection` support (#195595)

This PR adds stack probing and `-fstack-clash-protection` support to the
LoongArch backend and Clang driver.

The implementation is largely borrowed from the RISCV backend (cf.
#117612, #139731), with the same allocation-unrolling strategy for
const-sized allocations.



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