Dimitry Andric
0f0f2bfa77
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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0f0f2bfa77