[MIPS GlobalISel] Lower arguments using stack

Lower more than 4 arguments using stack. This patch targets MIPS32.
It supports only functions with arguments of type i32.

Patch by Petar Avramovic.

Differential Revision: https://reviews.llvm.org/D47934


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@336185 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed