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

[Charles Davis]

cdavis5x updated this revision to Diff 30720.
cdavis5x added a comment.
This revision now requires review to proceed.

Big belated update:

- Rebase onto http://reviews.llvm.org/rL243284.
- Go back to checking if the containing function uses the Win64 ABI. Opaque pointer types make checking the `va_list` type difficult.
- Don't do the "don't save XMM registers" dance in a variadic Win64 ABI function on a SysV platform. (This was something I missed last time.)


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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