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dim
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2015-02-02T20:34:40.858825Z
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V 691
Pull in r227752 from upstream llvm trunk (by Michael Kuperstein):

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

  This moves the transformation introduced in r223757 into a separate MI pass.
  This allows it to cover many more cases (not only cases where there must be a
  reserved call frame), and perform rudimentary call folding. It still doesn't
  have a heuristic, so it is enabled only for optsize/minsize, with stack
  alignment <= 8, where it ought to be a fairly clear win.

  (Re-commit of r227728)

  Differential Revision: http://reviews.llvm.org/D6789

This helps to get sys/boot/i386/boot2 below the required size again,
when optimizing with -Oz.

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