Chris Lattner beac75da37 implement rdar://6653118 - fastisel should fold loads where possible. ... Since mem2reg isn't run at -O0, we get a ton of reloads from the stack, for example, before, this code: int foo(int x, int y, int z) { return x+y+z; } used to compile into: _foo: ## @foo subq $12, %rsp movl %edi, 8(%rsp) movl %esi, 4(%rsp) movl %edx, (%rsp) movl 8(%rsp), %edx movl 4(%rsp), %esi addl %edx, %esi movl (%rsp), %edx addl %esi, %edx movl %edx, %eax addq $12, %rsp ret Now we produce: _foo: ## @foo subq $12, %rsp movl %edi, 8(%rsp) movl %esi, 4(%rsp) movl %edx, (%rsp) movl 8(%rsp), %edx addl 4(%rsp), %edx ## Folded load addl (%rsp), %edx ## Folded load movl %edx, %eax addq $12, %rsp ret Fewer instructions and less register use = faster compiles. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@113102 91177308-0d34-0410-b5e6-96231b3b80d8		2010-09-05 02:18:34 +00:00
..
ADT	fix this to work with allocators that have reference type with compilers	2010-09-04 18:45:02 +00:00
Analysis	Revert 112442 and 112440 until the compile time problems introduced	2010-09-01 01:45:53 +00:00
Assembly	lets get crazy and name the header file the exact class name,	2010-09-02 23:09:42 +00:00
Bitcode	Remove obsolete comments about throwing exceptions.	2010-09-02 22:14:51 +00:00
CodeGen	implement rdar://6653118 - fastisel should fold loads where possible.	2010-09-05 02:18:34 +00:00
CompilerDriver	llvmc: Make syntax more consistent.	2010-08-23 23:21:23 +00:00
Config	Fix LLVM target initialization to deal with sociopathic outside projects	2010-08-30 18:34:48 +00:00
ExecutionEngine
MC	Add AsmParser support for the ELF .previous directive. Patch by Roman Divacky.	2010-09-02 18:53:37 +00:00
Support	Re-enable CorrelatedValuePropagation. I've tested nightly tests, llvm-gcc	2010-09-03 04:16:28 +00:00
System	Remove obsolete comments about throwing exceptions.	2010-09-02 22:14:51 +00:00
Target	Reapply this increase to the number of virtual registers. All of the	2010-09-03 22:46:31 +00:00
Transforms	Reapply commit 112699, speculatively reverted by echristo, since	2010-09-02 08:14:03 +00:00
AbstractTypeUser.h
Argument.h
Attributes.h
AutoUpgrade.h
BasicBlock.h
CallGraphSCCPass.h
CallingConv.h
CMakeLists.txt
Constant.h
Constants.h	remove unions from LLVM IR. They are severely buggy and not	2010-08-28 04:09:24 +00:00
DerivedTypes.h	remove unions from LLVM IR. They are severely buggy and not	2010-08-28 04:09:24 +00:00
Function.h
GlobalAlias.h
GlobalValue.h	Create the new linker type "linker_private_weak_def_auto".	2010-08-20 22:05:50 +00:00
GlobalVariable.h
GVMaterializer.h
InlineAsm.h
InstrTypes.h
Instruction.def
Instruction.h
Instructions.h
IntrinsicInst.h	Add convenience class for working with eh.exception calls.	2010-09-01 09:26:00 +00:00
Intrinsics.h
Intrinsics.td	Comment typo.	2010-08-31 21:53:15 +00:00
IntrinsicsAlpha.td
IntrinsicsARM.td	Replace NEON vabdl, vaba, and vabal intrinsics with combinations of the	2010-09-03 01:35:08 +00:00
IntrinsicsCellSPU.td
IntrinsicsPowerPC.td
IntrinsicsX86.td	Revert int_x86_mmx_palignr_b intrinsic to match llvm-gcc's version.	2010-09-02 22:31:53 +00:00
IntrinsicsXCore.td
LinkAllPasses.h	Rename ValuePropagation to a more descriptive CorrelatedValuePropagation.	2010-08-31 07:48:34 +00:00
LinkAllVMCore.h	Delete SlowOperationInformer, which is no longer used.	2010-08-20 18:07:37 +00:00
Linker.h	Remove obsolete comments about throwing exceptions.	2010-09-02 22:14:51 +00:00
LLVMContext.h
Metadata.h	MDNode, MDString, and NamedMDNode are not meant to be subclassed;	2010-08-24 15:34:03 +00:00
Module.h
OperandTraits.h
Operator.h
Pass.h	Revert r111199; it breaks -debug-pass=Structure output.	2010-08-19 01:29:07 +00:00
PassAnalysisSupport.h
PassManager.h
PassManagers.h	Revert r111199; it breaks -debug-pass=Structure output.	2010-08-19 01:29:07 +00:00
PassRegistry.h
PassSupport.h
SymbolTableListTraits.h
Type.h	remove unions from LLVM IR. They are severely buggy and not	2010-08-28 04:09:24 +00:00
TypeSymbolTable.h
Use.h
User.h
Value.h	remove unions from LLVM IR. They are severely buggy and not	2010-08-28 04:09:24 +00:00
ValueSymbolTable.h