[PATCH] D42356: [AArch64] Implement dynamic stack probing for windows

[Martin Storsjö via Phabricator via llvm-commits]

mstorsjo created this revision.
mstorsjo added reviewers: compnerd, aemerson, t.p.northover.
Herald added subscribers: kristof.beyls, javed.absar, rengolin.

This makes sure that alloca() function calls properly probe the stack as needed.

This is partially based on https://reviews.llvm.org/D40863 by @aemerson.

Since GlobalISel was enabled on aarch64, the handling of ISD::DYNAMIC_STACKALLOC is bypassed completely on -O0 and handled by IRTranslator::translateAlloca instead. How would one hook up target specific behaviour like this with GlobalISel?


Repository:
  rL LLVM

https://reviews.llvm.org/D42356

Files:
  lib/Target/AArch64/AArch64CallingConvention.td
  lib/Target/AArch64/AArch64ISelLowering.cpp
  lib/Target/AArch64/AArch64ISelLowering.h
  lib/Target/AArch64/AArch64RegisterInfo.cpp
  lib/Target/AArch64/AArch64RegisterInfo.h
  test/CodeGen/AArch64/win-alloca.ll
  test/CodeGen/AArch64/win64_vararg.ll

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