[PATCH] D1622: Make variable argument intrinsics behave correctly in a Win64 CC function.

[Charles Davis via llvm-commits]

cdavis5x updated this revision to Diff 33051.
cdavis5x added a comment.

Just call `X86Subtarget::isCallingConvWin64` in `LowerVAARG`.

Don't bother checking if the function has a System V calling
convention on Windows; just use `X86Subtarget::isCallingConvWin64`.
That should be good enough for our purposes, since we're just going
to manually lower `__builtin_va_arg` on a `__builtin_ms_va_list`
anyhow. (I only added lowering of the `va_arg` instruction for
completeness here.)


http://reviews.llvm.org/D1622

Files:
  include/llvm/CodeGen/SelectionDAG.h
  lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
  lib/CodeGen/SelectionDAG/SelectionDAG.cpp
  lib/Target/X86/X86ISelLowering.cpp
  lib/Transforms/Instrumentation/MemorySanitizer.cpp
  test/CodeGen/X86/x86-64-ms_abi-vararg.ll

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