Pete Cooper a6ff22119f Move OperandList to be allocated prior to User for hung off subclasses. ... For hung off uses, we need a Use* to tell use where the operands are. This was User::OperandList but we want to remove that to save space of all subclasses which aren't making use of 'hung off uses'. Hung off uses now allocate their own 'OperandList' Use* in the User::new which they call. getOperandList() now uses the hung off uses bit to work out where the Use* for the OperandList lives. If a User has hung off uses, then this bit tells them to go back a single Use* from the User* and use that value as the OperandList. If a User has no hung off uses, then we get the first operand by subtracting (NumOperands * sizeof(Use)) from the User this pointer. This saves a pointer from User and all subclasses. Given the average size of a subclass of User is 112 or 128 bytes, this saves around 7% of space With malloc tending to align to 16-bytes the real saving is typically more like 3.5%. On 'opt -O2 verify-uselistorder.lto.bc', peak memory usage prior to this change is 149MB and after is 143MB so the savings are around 2.5% of peak. Looking at some passes which allocate many Instructions and Values, parseIR drops from 54.25MB to 52.21MB while the Inliner calls to Instruction::clone() drops from 28.20MB to 27.05MB. Reviewed by Duncan Exon Smith. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@239623 91177308-0d34-0410-b5e6-96231b3b80d8		2015-06-12 17:48:18 +00:00
..
AsmWriter.cpp	Prefer copy init over direct init. NFC.	2015-06-08 18:58:57 +00:00
AttributeImpl.h
Attributes.cpp	Add initial support for the convergent attribute.	2015-05-26 23:48:40 +00:00
AutoUpgrade.cpp
BasicBlock.cpp	Set proper debug location for branch added in BasicBlock::splitBasicBlock().	2015-06-11 18:25:54 +00:00
CMakeLists.txt
Comdat.cpp
ConstantFold.cpp	[ConstantFold] Don't skip the first gep index when folding geps	2015-06-04 07:01:56 +00:00
ConstantFold.h
ConstantRange.cpp
Constants.cpp	Replace all accesses to User::OperandList with getter and setter methods. NFC.	2015-06-12 17:48:05 +00:00
ConstantsContext.h
Core.cpp	[C API] Add LLVMStructGetTypeAtIndex.	2015-06-04 09:09:53 +00:00
DataLayout.cpp
DebugInfo.cpp
DebugInfoMetadata.cpp
DebugLoc.cpp
DiagnosticInfo.cpp	Replace an instance of custom atomics with standard ones.	2015-06-11 17:30:34 +00:00
DiagnosticPrinter.cpp
DIBuilder.cpp
Dominators.cpp
Function.cpp	ArgumentPromotion: Drop sret attribute on functions that are only called directly.	2015-06-10 21:14:34 +00:00
GCOV.cpp
Globals.cpp	Rename NumOperands to make it clear its managed by the User. NFC.	2015-06-12 17:48:10 +00:00
GVMaterializer.cpp
InlineAsm.cpp
Instruction.cpp	[PlaceSafepoints] Cleanup InsertSafepointPoll function	2015-05-26 21:03:23 +00:00
Instructions.cpp	Rename NumOperands to make it clear its managed by the User. NFC.	2015-06-12 17:48:10 +00:00
IntrinsicInst.cpp
IRBuilder.cpp
IRPrintingPasses.cpp
LegacyPassManager.cpp	Rangify more for loops in LegacyPassManager.cpp.	2015-06-05 17:48:47 +00:00
LLVMBuild.txt
LLVMContext.cpp	[IR/AsmWriter] Output escape sequences if the first character isdigit()	2015-06-02 21:25:08 +00:00
LLVMContextImpl.cpp
LLVMContextImpl.h	Move the name pointer out of Value into a map that lives on the	2015-06-01 22:24:01 +00:00
Makefile
Mangler.cpp	Revert "Move dllimport name mangling to IR mangler."	2015-06-11 01:31:48 +00:00
MDBuilder.cpp	Add isConstant argument to MDBuilder::createTBAAStructTagNode	2015-06-01 14:53:55 +00:00
Metadata.cpp	Move the name pointer out of Value into a map that lives on the	2015-06-01 22:24:01 +00:00
MetadataImpl.h
MetadataTracking.cpp
Module.cpp
module.modulemap
Operator.cpp
Pass.cpp
PassManager.cpp
PassRegistry.cpp
Statepoint.cpp
SymbolTableListTraitsImpl.h
Type.cpp	Int128 is also a built-in preconstructed type.	2015-06-02 23:56:53 +00:00
TypeFinder.cpp
Use.cpp
User.cpp	Move OperandList to be allocated prior to User for hung off subclasses.	2015-06-12 17:48:18 +00:00
Value.cpp	Rename NumOperands to make it clear its managed by the User. NFC.	2015-06-12 17:48:10 +00:00
ValueSymbolTable.cpp
ValueTypes.cpp
Verifier.cpp	Add initial support for the convergent attribute.	2015-05-26 23:48:40 +00:00