Philip Reames d021bb8003 [Statepoints 3/4] Statepoint infrastructure for garbage collection: SelectionDAGBuilder ... This is the third patch in a small series. It contains the CodeGen support for lowering the gc.statepoint intrinsic sequences (223078) to the STATEPOINT pseudo machine instruction (223085). The change also includes the set of helper routines and classes for working with gc.statepoints, gc.relocates, and gc.results since the lowering code uses them. With this change, gc.statepoints should be functionally complete. The documentation will follow in the fourth change, and there will likely be some cleanup changes, but interested parties can start experimenting now. I'm not particularly happy with the amount of code or complexity involved with the lowering step, but at least it's fairly well isolated. The statepoint lowering code is split into it's own files and anyone not working on the statepoint support itself should be able to ignore it. During the lowering process, we currently spill aggressively to stack. This is not entirely ideal (and we have plans to do better), but it's functional, relatively straight forward, and matches closely the implementations of the patchpoint intrinsics. Most of the complexity comes from trying to keep relocated copies of values in the same stack slots across statepoints. Doing so avoids the insertion of pointless load and store instructions to reshuffle the stack. The current implementation isn't as effective as I'd like, but it is functional and 'good enough' for many common use cases. In the long term, I'd like to figure out how to integrate the statepoint lowering with the register allocator. In principal, we shouldn't need to eagerly spill at all. The register allocator should do any spilling required and the statepoint should simply record that fact. Depending on how challenging that turns out to be, we may invest in a smarter global stack slot assignment mechanism as a stop gap measure. Reviewed by: atrick, ributzka git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@223137 91177308-0d34-0410-b5e6-96231b3b80d8		2014-12-02 18:50:36 +00:00
..
AsmWriter.cpp	Parse 'ghccc' in .ll files as the GHC convention (cc 10)	2014-12-01 21:04:44 +00:00
AsmWriter.h
AttributeImpl.h
Attributes.cpp
AutoUpgrade.cpp	Revert "IR: MDNode => Value"	2014-11-11 21:30:22 +00:00
BasicBlock.cpp
CMakeLists.txt	[Statepoints 3/4] Statepoint infrastructure for garbage collection: SelectionDAGBuilder	2014-12-02 18:50:36 +00:00
Comdat.cpp
ConstantFold.cpp
ConstantFold.h
ConstantRange.cpp
Constants.cpp	Revert "unique_ptrify LLVMContextImpl::CAZConstants"	2014-11-25 02:26:22 +00:00
ConstantsContext.h
Core.cpp	Revert "IR: MDNode => Value"	2014-11-11 21:30:22 +00:00
DataLayout.cpp
DebugInfo.cpp	Debug Info: revert r222195, r222210 and r222239.	2014-11-21 19:55:23 +00:00
DebugLoc.cpp
DiagnosticInfo.cpp	Revert "IR: MDNode => Value"	2014-11-11 21:30:22 +00:00
DiagnosticPrinter.cpp
DIBuilder.cpp	Debug Info: revert r222195, r222210 and r222239.	2014-11-21 19:55:23 +00:00
Dominators.cpp
Function.cpp	Revert "Masked Vector Load and Store Intrinsics."	2014-11-28 21:29:14 +00:00
GCOV.cpp	GCOV: Make sure that function idents in the .gcda and .gcno match	2014-11-06 06:55:02 +00:00
Globals.cpp	Copy externally_initialized in GlobalVariable::copyAttributesFrom.	2014-11-10 18:41:59 +00:00
GVMaterializer.cpp
InlineAsm.cpp
Instruction.cpp	Revert "IR: MDNode => Value"	2014-11-11 21:30:22 +00:00
Instructions.cpp	Revert r220349 to re-instate r220277 with a fix for PR21330 -- quite	2014-11-25 08:20:27 +00:00
IntrinsicInst.cpp
IRBuilder.cpp	Revert "Masked Vector Load and Store Intrinsics."	2014-11-28 21:29:14 +00:00
IRPrintingPasses.cpp
LeakDetector.cpp
LeaksContext.h
LegacyPassManager.cpp
LLVMBuild.txt
LLVMContext.cpp	Remove StringMap::GetOrCreateValue in favor of StringMap::insert	2014-11-19 05:49:42 +00:00
LLVMContextImpl.cpp	Revert "unique_ptrify LLVMContextImpl::CAZConstants"	2014-11-25 02:26:22 +00:00
LLVMContextImpl.h	Revert "unique_ptrify LLVMContextImpl::CAZConstants"	2014-11-25 02:26:22 +00:00
Makefile
Mangler.cpp
MDBuilder.cpp
Metadata.cpp	IR: Sink MDNode::Hash down to GenericMDNode::Hash	2014-11-18 02:20:29 +00:00
Module.cpp	Remove StringMap::GetOrCreateValue in favor of StringMap::insert	2014-11-19 05:49:42 +00:00
module.modulemap
Pass.cpp
PassManager.cpp
PassRegistry.cpp
Statepoint.cpp	[Statepoints 3/4] Statepoint infrastructure for garbage collection: SelectionDAGBuilder	2014-12-02 18:50:36 +00:00
SymbolTableListTraitsImpl.h
Type.cpp	Update SetVector to rely on the underlying set's insert to return a pair<iterator, bool>	2014-11-19 07:49:26 +00:00
TypeFinder.cpp	Revert "IR: MDNode => Value"	2014-11-11 21:30:22 +00:00
Use.cpp
UseListOrder.cpp
User.cpp
Value.cpp	[InstCombine] Re-commit of r218721 (Optimize icmp-select-icmp sequence)	2014-11-21 23:36:44 +00:00
ValueSymbolTable.cpp	Remove StringMap::GetOrCreateValue in favor of StringMap::insert	2014-11-19 05:49:42 +00:00
ValueTypes.cpp
Verifier.cpp	[Statepoints 1/4] Statepoint infrastructure for garbage collection: IR Intrinsics	2014-12-01 21:18:12 +00:00