by Anton Korobeynikov!  This is a step towards closing PR786.

llvm-svn: 28447

llvm-svn: 26720

1. Use flags on the instructions in the .td file to indicate the PPC970 unit
   type instead of a table in the .cpp file.  Much cleaner.
2. Change the hazard recognizer to build d-groups according to the actual
   algorithm used, not my flawed understanding of it.
3. Model "must be in the first slot" and "must be the only instr in a group"
   accurately.

llvm-svn: 26719

llvm-svn: 26562

llvm-svn: 25914

Move isLoadFrom/StoreToStackSlot from MRegisterInfo to TargetInstrInfo,a far more logical place.  Other methods should also be moved if anyoneis interested. :)

llvm-svn: 25913

llvm-svn: 25422

llvm-svn: 25421

redundant after the change.

llvm-svn: 23759

This completes the grand PPC file renaming

llvm-svn: 23745

llvm-svn: 23743

from the .td file that correspond to it

llvm-svn: 23736

is zero.  This lets the register allocator elide some copies in some cases.

This implements CodeGen/PowerPC/rlwimi-commute.ll

llvm-svn: 23292

llvm-svn: 21425

llvm-svn: 15850

llvm-svn: 15671

llvm-svn: 15636

llvm-svn: 15631

Patch by Nate Begeman.

llvm-svn: 15281

llvm-svn: 14897

llvm-svn: 14283