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Author SHA1 Message Date
Alex Bradbury 8a70468a27 [RISCV] Only mark fp as reserved if the function has a dedicated frame pointer 
This follows similar logic in the ARM and Mips backends, and allows the free
use of s0 in functions without a dedicated frame pointer. The changes in
callee-saved-gprs.ll most clearly show the effect of this patch.

llvm-svn: 356063
 2019-03-13 16:33:45 +00:00
Alex Bradbury c965d21f33 [RISCV] Add test cases for the lp64 ABI 
These are closely modeled on similar tests for the ilp32 ABI. Like those
tests, we group together tests that should be common cross lp64, lp64+lp64f,
and lp64+lp64f+lp64d ABIs.

llvm-svn: 355899
 2019-03-12 09:26:53 +00:00