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llvm-6502/lib/CodeGen/SelectionDAG
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Andrew Trick f697c8a19a Support for precise scheduling of the instruction selection DAG, 
disabled in this checkin. Sorry for the large diffs due to
refactoring. New functionality is all guarded by EnableSchedCycles.

Scheduling the isel DAG is inherently imprecise, but we give it a best
effort:
- Added MayReduceRegPressure to allow stalled nodes in the queue only
  if there is a regpressure need.
- Added BUHasStall to allow checking for either dependence stalls due to
  latency or resource stalls due to pipeline hazards.
- Added BUCompareLatency to encapsulate and standardize the heuristics
  for minimizing stall cycles (vs. reducing register pressure).
- Modified the bottom-up heuristic (now in BUCompareLatency) to
  prioritize nodes by their depth rather than height. As long as it
  doesn't stall, height is irrelevant. Depth represents the critical
  path to the DAG root.
- Added hybrid_ls_rr_sort::isReady to filter stalled nodes before
  adding them to the available queue.

Related Cleanup: most of the register reduction routines do not need
to be templates.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123468 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-14 21:11:41 +00:00
..
CMakeLists.txt
DAGCombiner.cpp Rename TargetFrameInfo into TargetFrameLowering. Also, put couple of FIXMEs and fixes here and there. 2011-01-10 12:39:04 +00:00
FastISel.cpp If dbg_declare() or dbg_value() is not lowered by isel then emit DEBUG message instead of creating DBG_VALUE for undefined value in reg0. 2010-12-06 22:39:26 +00:00
FunctionLoweringInfo.cpp Rename TargetFrameInfo into TargetFrameLowering. Also, put couple of FIXMEs and fixes here and there. 2011-01-10 12:39:04 +00:00
InstrEmitter.cpp Simplify a bunch of isVirtualRegister() and isPhysicalRegister() logic. 2011-01-10 02:58:51 +00:00
InstrEmitter.h
LegalizeDAG.cpp Fix r123346 to handle scalar types too. 2011-01-13 01:06:51 +00:00
LegalizeFloatTypes.cpp PR5207: Rename overloaded APInt methods set(), clear(), flip() to 2010-12-01 08:53:58 +00:00
LegalizeIntegerTypes.cpp Move ExpandAtomic into the integer expansion routines - it's only used there. 2011-01-11 00:36:08 +00:00
LegalizeTypes.cpp Move ExpandAtomic into the integer expansion routines - it's only used there. 2011-01-11 00:36:08 +00:00
LegalizeTypes.h Add some fairly duplicated code to let type legalization split illegal 2011-01-06 22:28:56 +00:00
LegalizeTypesGeneric.cpp Renaming ISD::BIT_CONVERT to ISD::BITCAST to better reflect the LLVM IR concept. 2010-11-23 03:31:01 +00:00
LegalizeVectorOps.cpp Renaming ISD::BIT_CONVERT to ISD::BITCAST to better reflect the LLVM IR concept. 2010-11-23 03:31:01 +00:00
LegalizeVectorTypes.cpp Change EXTRACT_SUBVECTOR to require a constant index. 2011-01-07 04:58:56 +00:00
Makefile
ScheduleDAGFast.cpp flags -> glue for selectiondag 2010-12-23 17:24:32 +00:00
ScheduleDAGList.cpp Various bits of framework needed for precise machine-level selection 2010-12-24 05:03:26 +00:00
ScheduleDAGRRList.cpp Support for precise scheduling of the instruction selection DAG, 2011-01-14 21:11:41 +00:00
ScheduleDAGSDNodes.cpp flags -> glue for selectiondag 2010-12-23 17:24:32 +00:00
ScheduleDAGSDNodes.h rename MVT::Flag to MVT::Glue. "Flag" is a terrible name for 2010-12-21 02:38:05 +00:00
SDNodeDbgValue.h Merge System into Support. 2010-11-29 18:16:10 +00:00
SDNodeOrdering.h
SelectionDAG.cpp Rename TargetFrameInfo into TargetFrameLowering. Also, put couple of FIXMEs and fixes here and there. 2011-01-10 12:39:04 +00:00
SelectionDAGBuilder.cpp Rename TargetFrameInfo into TargetFrameLowering. Also, put couple of FIXMEs and fixes here and there. 2011-01-10 12:39:04 +00:00
SelectionDAGBuilder.h Avoid zero extend bit test operands to pointer type if all the masks fit in 2011-01-06 01:02:44 +00:00
SelectionDAGISel.cpp Set the insertion point correctly for instructions generated by load folding: 2011-01-14 01:33:40 +00:00
SelectionDAGPrinter.cpp flags -> glue for selectiondag 2010-12-23 17:24:32 +00:00
TargetLowering.cpp Fix PR 8916 (qv for analysis), at least the immediate problem. 2011-01-10 21:53:07 +00:00
TargetSelectionDAGInfo.cpp