[PATCH] [X86] Convert esp-relative movs of function arguments to pushes, step 2

[Michael Kuperstein]

So, this version should actually work (e.g. it can self-host and past check-llvm. Without the stackalign restriction of course, since that currently makes it a nop except on windows).
Unfortunately, it has several big warts, so I'm not planning to commit it as is. This is more of a request for ideas on how to improve the code.

So, any ideas on how to make this sane, especially X86InstrInfo::getSPAdjust(), are welcome.


http://reviews.llvm.org/D6789

Files:
  lib/CodeGen/PrologEpilogInserter.cpp
  lib/Target/X86/CMakeLists.txt
  lib/Target/X86/X86.h
  lib/Target/X86/X86ConvertMovsToPushes.cpp
  lib/Target/X86/X86FastISel.cpp
  lib/Target/X86/X86FrameLowering.cpp
  lib/Target/X86/X86FrameLowering.h
  lib/Target/X86/X86InstrCompiler.td
  lib/Target/X86/X86InstrInfo.cpp
  lib/Target/X86/X86InstrInfo.h
  lib/Target/X86/X86MachineFunctionInfo.h
  lib/Target/X86/X86RegisterInfo.cpp
  lib/Target/X86/X86TargetMachine.cpp
  test/CodeGen/X86/inalloca-invoke.ll
  test/CodeGen/X86/movtopush.ll

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