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
..
Analysis	Turn X-(X-Y) into Y. According to my auto-simplifier this is the most common	2011-01-14 15:26:10 +00:00
Archive	Fix Whitespace.	2011-01-10 02:34:40 +00:00
AsmParser	Reject uses of unnamed_addr in declarations.	2011-01-13 01:30:30 +00:00
Bitcode	FixedNumOperandTraits and VariadicOperandTraits assumed that, given a	2011-01-11 15:07:38 +00:00
CodeGen	Support for precise scheduling of the instruction selection DAG,	2011-01-14 21:11:41 +00:00
CompilerDriver	Support/Path: Deprecate PathV1::exists and replace all uses with PathV2::fs::exists.	2011-01-10 02:34:23 +00:00
ExecutionEngine	Rename TargetFrameInfo into TargetFrameLowering. Also, put couple of FIXMEs and fixes here and there.	2011-01-10 12:39:04 +00:00
Linker	Keep unnamed_addr when linking.	2011-01-13 05:12:34 +00:00
MC	Completed :lower16: / :upper16: support for movw / movt pairs on Darwin.	2011-01-14 02:38:49 +00:00
Object
Support	Support/Path: Deprecate PathV1::IsSymlink and replace all uses with PathV2::is_symlink.	2011-01-12 23:55:06 +00:00
Target	revert my fastisel patch again which apparently still gives the	2011-01-14 06:14:33 +00:00
Transforms	switch SRoA to use LoadAndStorePromoter instead of its own copy of the code.	2011-01-14 19:50:47 +00:00
VMCore	Remove casts between Value** and Constant**, which won't work if a	2011-01-14 08:07:43 +00:00
Makefile