Commit Graph

2 Commits

Author SHA1 Message Date
Jakob Stoklund Olesen
6381da948f Handle ABI arguments correctly in the reload pass.
Values passed as arguments to calls and return instructions may also be
reload candidates.
2017-06-13 15:13:36 -07:00
Jakob Stoklund Olesen
36f189810e Basic spilling implementation.
Add a spilling pass which lowers register pressure by assigning SSA
values to the stack. Important missing features:

- Resolve conflicts where an instruction uses the same value more than
  once in incompatible ways.
- Deal with EBB arguments.

Fix bugs in the reload pass exposed by the first test case:

- Create live ranges for temporary registers.
- Set encodings on created spill and fill instructions.
2017-06-13 13:58:20 -07:00