Matt Arsenault 0410cd21d2 AMDGPU: Move SIFixSGPRLiveRanges to be a regalloc pass ... Replace LiveInterval usage with LiveVariables. LiveIntervals computes far more information than is needed for this pass which just needs to find if an SGPR is live out of the defining block. LiveIntervals are not usually available that early, requiring computing them twice which is very expensive. The extra run of LiveIntervals/LiveVariables/SlotIndexes was costing in total about 5% of compile time. Continuing to use LiveIntervals is problematic. It seems there is an option (early-live-intervals) to run the analysis about where it should go to avoid recomputing LiveVariables, but it seems to be completely broken with subreg liveness enabled. There are also problems from trying to recompute LiveIntervals since this seems to undo LiveVariables and clearing kill flags, causing TwoAddressInstructions to make bad decisions. Insert the pass right after live variables and preserve it. The tricky case to worry about might be phis since LiveVariables doesn't count a register as live out if in the successor block it is only used in a phi, but I don't think this is a concern right now because SIFixSGPRCopies replaces SGPR phis. llvm-svn: 249087		2015-10-01 22:10:03 +00:00
..
Analysis	Refactor computeKnownBits alignment handling code	2015-09-30 11:55:45 +00:00
AsmParser	HHVM calling conventions.	2015-09-29 22:09:16 +00:00
Bitcode	[Bitcode][Asm] Teach LLVM to read and write operand bundles.	2015-09-24 23:34:52 +00:00
CodeGen	[WinEH] Emit __C_specific_handler tables for the new IR	2015-10-01 21:38:24 +00:00
DebugInfo	Use makeArrayRef or None to avoid unnecessarily mentioning the ArrayRef type extra times. NFC	2015-09-21 05:32:41 +00:00
ExecutionEngine	Fix performance problem in long-running SectionMemoryManagers	2015-10-01 02:45:07 +00:00
Fuzzer	[libFuzzer] Marking exported symbols as visible. Patch by Mike Aizatsky	2015-09-30 22:22:37 +00:00
IR	Fix debug info with SafeStack.	2015-09-30 19:55:43 +00:00
IRReader
LibDriver	There is only one saver of strings.	2015-08-13 01:07:02 +00:00
LineEditor
Linker	[opaque pointer types] Switch a few cases of getElementType over, since I had them lying around anyway	2015-09-14 20:29:26 +00:00
LTO	Reapply "LTO: Disable extra verify runs in release builds"	2015-09-15 23:05:59 +00:00
MC	MCAsmInfo: Allow targets to specify when the .section directive should be omitted	2015-09-25 21:41:14 +00:00
Object	Prune trailing whitespaces.	2015-09-22 11:19:03 +00:00
Option
Passes	[PM] Port SROA to the new pass manager.	2015-09-12 09:09:14 +00:00
ProfileData	InstrProf: Don't call std::unique twice here	2015-09-30 02:02:08 +00:00
Support	[BranchProbability] Manually round the floating point output.	2015-09-26 10:09:36 +00:00
TableGen
Target	AMDGPU: Move SIFixSGPRLiveRanges to be a regalloc pass	2015-10-01 22:10:03 +00:00
Transforms	[InstCombine] Remove trivially empty lifetime start/end ranges.	2015-10-01 14:54:31 +00:00
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LLVMBuild.txt
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