llvm-svn: 109045

llvm-svn: 108556

llvm-svn: 107556

Moderate the weight given to very small intervals.

The spill weight given to new intervals created when spilling was not
normalized in the same way as the original spill weights calculated by
CalcSpillWeights. That meant that restored registers would tend to hang around
because they had a much higher spill weight that unspilled registers.

This improves the runtime of a few tests by up to 10%, and there are no
significant regressions.

llvm-svn: 96613

llvm-svn: 95747

llvm-svn: 95746

llvm-svn: 95745

into TargetOpcodes.h.  #include the new TargetOpcodes.h
into MachineInstr.  Add new inline accessors (like isPHI())
to MachineInstr, and start using them throughout the 
codebase.

llvm-svn: 95687

llvm-svn: 95647

Change errs() to dbgs().

llvm-svn: 92099

This fixes an in-place update bug where code inserted at the end of basic blocks may not be covered by existing intervals which were live across the entire block. It is also consistent with the way ranges are specified for live intervals.

llvm-svn: 91859

Moved spill weight calculation out of SimpleRegisterCoalescing and into its own pass: CalculateSpillWeights.

llvm-svn: 91273