coalescing as a separate pass rather than inside of
LiveIntervalAnalysis.

llvm-svn: 59146

- Create and update spill slot live intervals.
- Lots of bug fixes.

llvm-svn: 58367

Fix PR2634.  Create new virtual registers from spills early so that we
can give it the same stack slot as the spilled interval if it is folded.
This prevents the fold/unfold code from pointing to the wrong register.

llvm-svn: 58255

llvm-svn: 58068

llvm-svn: 57766

llvm-svn: 57765

llvm-svn: 57259

isReg, etc., from isRegister, etc.

llvm-svn: 57006

Fix a simple error in renumbering kill markaers, that took an inordinant amount of time to track down.

llvm-svn: 56889

llvm-svn: 56848

"If a re-materializable instruction has a register
operand, the spiller will change the register operand's
spill weight to HUGE_VAL to avoid it being spilled.
However, if the operand is already in the queue ready
to be spilled, avoid re-materializing it".

llvm-svn: 56837

If a re-materializable instruction has a register operand, the spiller will change the register operand's spill weight to HUGE_VAL to avoid it being spilled. However, if the operand is already in the queue ready to be spilled, avoid re-materializing it.

llvm-svn: 56835

RA problem by expanding the live interval of an
earlyclobber def back one slot.  Remove
overlap-earlyclobber throughout.  Remove 
earlyclobber bits and their handling from
live internals.

llvm-svn: 56539

correct in the presence of things like EH labels.

llvm-svn: 56410

and redo as linked list walk.  Logic moved into RA.
Per review feedback.

llvm-svn: 56326

with an earlyclobber operand elsewhere.  Propagate
this bit and the earlyclobber bit through SDISel.
Change linear-scan RA not to allocate regs in a way 
that conflicts with an earlyclobber.  See also comments.

llvm-svn: 56290

Live intervals for live-in registers should begin at the beginning of a basic block, not at the first
instruction.  Also, their valno's should have an unknown def.  This has no effect currently, but was
causing issues when StrongPHIElimination was enabled.

llvm-svn: 56231

isImmediate(), isRegister(), and friends, to avoid confusion
about having two different names with the same meaning. I'm
not attached to the longer names, and would be ok with
changing to the shorter names if others prefer it.

llvm-svn: 56189

llvm-svn: 55012

With this patch, all of MultiSource/Applications and all of SPEC2000/2006 pass with
the SimpleSpiller and this fast-path enabled.

llvm-svn: 55000

llvm-svn: 54958

  1) Assign stack slots to new temporaries.
  2) Don't insert an interval into the return vector more than once.

llvm-svn: 54956

  1) Remove an incorrect assertion.
  2) Set the stack slot weight properly.
  3) Resize the VirtRegMap when needed.

llvm-svn: 54949

llvm-svn: 54939

llvm-svn: 54930

Resurrect some ancient code to add spill ranges without attempting folding, remat, or splitting.  This code has been updated to current APIs
in so far as it compiles and, in theory, works, but does not take advantage of recent advancements.  For instance, it could be improved by using
MachineRegisterInfo::use_iterator.

llvm-svn: 54924

llvm-svn: 54766

llvm-svn: 54765

Make the allocation of LiveIntervals explicit, rather than holding them in the r2iMap_ by value.  This will prevent references to them from being invalidated
if the map is changed.

llvm-svn: 54763

llvm-svn: 54425

llvm-svn: 54420

llvm-svn: 54218

llvm-svn: 54186

llvm-svn: 54173

a new ilist_node class, and remove them. Unlike alist_node,
ilist_node doesn't attempt to manage storage itself, so it avoids
the associated problems, including being opaque in gdb.

Adjust the Recycler class so that it doesn't depend on alist_node.
Also, change it to use explicit Size and Align parameters, allowing
it to work when the largest-sized node doesn't have the greatest
alignment requirement.

Change MachineInstr's MachineMemOperand list from a pool-backed
alist to a std::list for now.

llvm-svn: 54146

llvm-svn: 54136

llvm-svn: 54072

Special cases are needed in renumbering when dealing with renumbering after a PHI has been removed.  The interval previously defined
by the PHI needs to be extended to the beginning of its basic block, and the intervals that were inputs need to be trimmed to the end 
of their basic blocks.

llvm-svn: 54070

llvm-svn: 54061

This is tricky business, and will probably take a few more iterations to get
the last kinks out of it.

llvm-svn: 54043