[llvm-commits] Patch to use proper calling convention for i386--win32 _ftol2 runtime function

[Joe Groff]

Here's a patch that adds a WIN_FTOL_* family of pseudo-instructions
modelling the unique calling convention used by the Win32 _ftol2
runtime function. I'm not totally happy with the tests I wrote; even
using -O0, it appears to depend on the behavior of the scheduler
somewhat, so any feedback on how to write a more robust test would be
appreciated, along with any other comments. Thanks Jakob Stoklund
Olesen for walking me through things.

-Joe
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