Dispatch C calling conv. to one of these conventions based on
target triple and subtarget features.

llvm-svn: 73530

llvm-svn: 73098

ABI. The missing piece is support for putting "homogeneous aggregates"
into registers.

Patch by Sandeep Patel!

llvm-svn: 73095

the stack.  Patch by Sandeep Patel.

llvm-svn: 72106

should be bit-converted to i32, it is sufficient to list only i32 in
subsequent definitions.

llvm-svn: 69973

punctuation.  No functional changes.

llvm-svn: 69378

for ARM.  Patch by Sandeep Patel.

llvm-svn: 69371