[all-commits] [llvm/llvm-project] abc693: [AArch64] Skip over shadow space for ARM64EC entry...

[Billy Laws via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: abc693fb4051dfb3a49ba2dcdbc2d164c53f2a51
      https://github.com/llvm/llvm-project/commit/abc693fb4051dfb3a49ba2dcdbc2d164c53f2a51
  Author: Billy Laws <blaws05 at gmail.com>
  Date:   2024-02-27 (Tue, 27 Feb 2024)

  Changed paths:
    M llvm/lib/Target/AArch64/AArch64Arm64ECCallLowering.cpp
    M llvm/lib/Target/AArch64/AArch64CallingConvention.td
    M llvm/test/CodeGen/AArch64/arm64ec-entry-thunks.ll

  Log Message:
  -----------
  [AArch64] Skip over shadow space for ARM64EC entry thunk variadic calls (#80994)

When in an entry thunk the x64 SP is passed in x4 but this cannot be
directly passed through since x64 varargs calls have a 32 byte shadow
store at SP followed by the in-stack parameters. ARM64EC varargs calls
on the other hand expect x4 to point to the first in-stack parameter.



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