[mips] Mark aggregates returned in registers with the 'inreg' attribute.
Summary:
This allows us to easily find them in the backend after the aggregates have
been lowered to other types. This is important on big-endian targets using
the N32/N64 ABI's since these ABI's must shift small structures into the
upper bits of the register.
Reviewers: atanasyan
Reviewed By: atanasyan
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D5005
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@217160
91177308-0d34-0410-b5e6-
96231b3b80d8