Evan Cheng c92da3882e There are times when the coalescer would not coalesce away a copy but the copy ... can be eliminated by the allocator is the destination and source targets the same register. The most common case is when the source and destination registers are in different class. For example, on x86 mov32to32_ targets GR32_ which contains a subset of the registers in GR32. The allocator can do 2 things: 1. Set the preferred allocation for the destination of a copy to that of its source. 2. After allocation is done, change the allocation of a copy destination (if legal) so the copy can be eliminated. This eliminates 443 extra moves from 403.gcc. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43662 91177308-0d34-0410-b5e6-96231b3b80d8		2007-11-03 07:20:12 +00:00
..
ADT	When converting to integer, do bit manipulations in the destination	2007-11-01 22:43:37 +00:00
Analysis	VAArgInst does, in fact, read memory.	2007-11-02 04:01:21 +00:00
Assembly	More fleshing out of docs/Passes.html, plus some typo fixes and	2007-10-26 03:03:51 +00:00
Bitcode	Added overloaded version of Deserializer::ReadOwnedPtr which allows	2007-11-02 18:04:20 +00:00
CodeGen	There are times when the coalescer would not coalesce away a copy but the copy	2007-11-03 07:20:12 +00:00
Config
Debugger
ExecutionEngine
Support	The guaranteed alignment of ptr+offset is only the minimum of	2007-10-28 12:59:45 +00:00
System
Target	Executive summary: getTypeSize -> getTypeStoreSize / getABITypeSize.	2007-11-01 20:53:16 +00:00
Transforms
AbstractTypeUser.h
Argument.h
AutoUpgrade.h
BasicBlock.h
CallGraphSCCPass.h
CallingConv.h
Constant.h
Constants.h	Get rid of compilation warning during release builds	2007-11-01 08:24:40 +00:00
DerivedTypes.h
Function.h
GlobalAlias.h
GlobalValue.h
GlobalVariable.h
InlineAsm.h
InstrTypes.h
Instruction.def
Instruction.h
Instructions.h
IntrinsicInst.h
Intrinsics.h
Intrinsics.td	Model stacksave and stackrestore as both writing memory, since we	2007-10-29 05:47:52 +00:00
IntrinsicsPowerPC.td
IntrinsicsX86.td	Add missing SSE builtins: CVTPD2PI, CVTPS2PI,	2007-10-30 22:15:38 +00:00
LinkAllPasses.h
LinkAllVMCore.h
Linker.h
LinkTimeOptimizer.h
Module.h
ModuleProvider.h
ParameterAttributes.h
Pass.h
PassAnalysisSupport.h
PassManager.h	remove unimplemented ctor, add some comments.	2007-10-25 05:19:24 +00:00
PassManagers.h
PassSupport.h
SymbolTableListTraits.h
Type.h
TypeSymbolTable.h
Use.h
User.h
Value.h
ValueSymbolTable.h