[llvm-commits] InReg patch for review

[Anton Korobeynikov]

Hello, Everyone.

Attached patch will implement "inreg" function argument attribute, which
is used to tell backend "place this argument in register, if possible".
The needed changes in x86 backend were made as well.

This also allowed to merge C & StdCall CCs and Fast & FastCall CCs
inside x86 backend. 

This patch is first step for supporting gcc's "regparm" function
attribute.

-- 
With best regards, Anton Korobeynikov.

Faculty of Mathematics & Mechanics, Saint Petersburg State University.

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