Remove isSubroutineType test for isCompositeType, getTag() is enough.
R600/SI: Make sure non-inline constants aren't folded into mubuf soffset operand

mubuf instructions now define the soffset field using the SCSrc_32
register class which indicates that only SGPRs and inline constants
are allowed.
R600/SI: isLegalOperand() shouldn't check constant bus for SALU instructions

The constant bus restrictions only apply to VALU instructions.  This
enables SIFoldOperands to fold immediates into SALU instructions.
Model sqrtss as a binary operation with one source operand tied to the destination (PR14221)

This is a continuation of r167064 ( http://llvm.org/viewvc/llvm-project?view=revision&revision=167064 ).
That patch started to fix PR14221 ( http://llvm.org/bugs/show_bug.cgi?id=14221 ), but it was not completed.

Differential Revision: http://reviews.llvm.org/D6330
Add the ExceptionHandling::MSVC enumeration

It is intended to be used for a family of personality functions that
have similar IR preparation requirements. Typically when interoperating
with MSVC personality functions, bits of functionality need to be
outlined from the main function into helper functions. There is also
usually more than one landing pad per invoke, which does not match the
LLVM IR landingpad representation.

None of this is implemented yet. This change just adds a new enum that
is active for *-windows-msvc and delegates to the EH removal preparation
pass.  No functionality change for other targets.