Jakob Stoklund Olesen 87360f73ae Reapply r134047 now that the world is ready for it. ... This patch will sometimes choose live range split points next to interference instead of always splitting next to a register point. That means spill code can now appear almost anywhere, and it was necessary to fix code that didn't expect that. The difficult places were: - Between a CALL returning a value on the x87 stack and the corresponding FpPOP_RETVAL (was FpGET_ST0). Probably also near x87 inline assembly, but that didn't actually show up in testing. - Between a CALL popping arguments off the stack and the corresponding ADJCALLSTACKUP. Both are fixed now. The only place spill code can't appear is after terminators, see SplitAnalysis::getLastSplitPoint. Original commit message: Rewrite RAGreedy::splitAroundRegion, now with cool ASCII art. This function has to deal with a lot of special cases, and the old version got it wrong sometimes. In particular, it would sometimes leave multiple uses in the stack interval in a single block. That causes bad code with multiple reloads in the same basic block. The new version handles block entry and exit in a single pass. It first eliminates all the easy cases, and then goes on to create a local interval for the blocks with difficult interference. Previously, we would only create the local interval for completely isolated blocks. It can happen that the stack interval becomes completely empty because we could allocate a register in all edge bundles, and the new local intervals deal with the interference. The empty stack interval is harmless, but we need to remove a SplitKit assertion that checks for empty intervals. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134125 91177308-0d34-0410-b5e6-96231b3b80d8		2011-06-30 01:30:39 +00:00
..
Analysis	Cleanup. Fix a stupid variable name.	2011-06-28 05:41:52 +00:00
Archive	Revert PathV2 changes, as sys::fs::unique_file is not finished yet.	2011-03-01 19:50:55 +00:00
AsmParser	Replace the existing forms of ConstantArray::get() with a single form	2011-06-22 09:24:39 +00:00
Bitcode	Replace the existing forms of ConstantArray::get() with a single form	2011-06-22 09:24:39 +00:00
CodeGen	Reapply r134047 now that the world is ready for it.	2011-06-30 01:30:39 +00:00
CompilerDriver	Build CompilerDriver library.	2011-03-12 22:01:42 +00:00
ExecutionEngine	Sink SubtargetFeature and TargetInstrItineraries (renamed MCInstrItineraries) into MC.	2011-06-29 01:14:12 +00:00
Linker	Set the unnamed_addr only when we're creating a new GV in the dest module.	2011-03-29 23:31:06 +00:00
MC	* Use the proper size to output the range size.	2011-06-30 00:30:52 +00:00
Object	Object: Add proper error handling.	2011-06-25 17:55:23 +00:00
Support	Fix the implementation of ConstantRange::sub(ConstantRange). Patch by Xi Wang!	2011-06-22 21:13:46 +00:00
Target	Make sure we use the correct register class here since we'll need to	2011-06-30 01:05:46 +00:00
Transforms	indvars -disable-iv-rewrite: handle an edge case involving identity phis.	2011-06-30 01:27:23 +00:00
VMCore	Temporarily revert r134057: "Let simplify cfg simplify bb with only debug and	2011-06-29 16:22:11 +00:00
CMakeLists.txt	Build CompilerDriver library.	2011-03-12 22:01:42 +00:00
Makefile	Add LLVMObject Library.	2010-11-15 03:21:41 +00:00