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3 Commits

Author SHA1 Message Date
Alex Bradbury
ff5fe57525 [RISCV] Implement frame pointer elimination 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@322839 91177308-0d34-0410-b5e6-96231b3b80d8
 2018-01-18 11:34:02 +00:00
Alex Bradbury
585e4d5040 [RISCV] Reserve an emergency spill slot for the register scavenger when necessary 
Although the register scavenger can often find a spare register, an emergency 
spill slot is needed to guarantee success. Reserve this slot in cases where 
the function is known to have a large stack (meaning the scavenger may be 
needed when forming stack addresses).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@322269 91177308-0d34-0410-b5e6-96231b3b80d8
 2018-01-11 11:17:19 +00:00
Alex Bradbury
58c4e96dc9 [RISCV] Support stack frames and offsets up to 32-bits 
Differential Revision: https://reviews.llvm.org/D40807


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@322216 91177308-0d34-0410-b5e6-96231b3b80d8
 2018-01-10 19:53:46 +00:00