Commit Graph

105 Commits

Author SHA1 Message Date
Chris Lattner cc3035e989 Now that we have operand info for machine instructions, use it to create
temporary registers for things that define a register.  This allows dag->dag
isel to compile this:

int %test() { ret int 65535 }

into:

_test:
        lis r2, 0
        ori r2, r2, 65535
        blr

Next up, getting CopyFromReg to work, allowing arguments and cross-bb values.

llvm-svn: 22932
2005-08-19 20:45:43 +00:00
Chris Lattner d18beab94c Fix computation of # operands, add a temporary hack for CopyToReg
llvm-svn: 22896
2005-08-19 01:01:34 +00:00
Chris Lattner 0c8c2c102d add a new -view-sched-dags option to view dags as they are sent to the scheduler.
llvm-svn: 22878
2005-08-18 20:11:49 +00:00
Chris Lattner d342de9aaa Implement the first chunk of a code emitter. This is sophisticated enough to
codegen:

_empty:
.LBB_empty_0:   ;
        blr

but can't do anything more (yet). :)

llvm-svn: 22876
2005-08-18 20:07:59 +00:00
Chris Lattner 1b4727de7d new file, obviously just a stub
llvm-svn: 22868
2005-08-18 18:45:24 +00:00