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
..
Analysis.h	Move several SelectionDAG-independent utility functions out of the	2010-04-21 01:22:34 +00:00
AsmPrinter.h	Fix .debug_range for linux. Patch by Krister Wombell.	2010-09-02 16:43:44 +00:00
BinaryObject.h
CalcSpillWeights.h	Implement register class inflation.	2010-08-10 18:37:40 +00:00
CallingConvLower.h	Fix eabi calling convention when a 64 bit value shadows r3.	2010-08-06 15:35:32 +00:00
FastISel.h	implement rdar://6653118 - fastisel should fold loads where possible.	2010-09-05 02:18:34 +00:00
FunctionLoweringInfo.h	Reapply r112623. Included additional check for unused byval argument.	2010-08-31 22:22:42 +00:00
GCMetadata.h	Trailing whitespace.	2010-07-01 01:00:22 +00:00
GCMetadataPrinter.h	Trailing whitespace.	2010-07-01 01:00:22 +00:00
GCs.h
GCStrategy.h
IntrinsicLowering.h
ISDOpcodes.h	This is the first step towards refactoring the x86 vector shuffle code. The	2010-08-20 22:55:05 +00:00
JITCodeEmitter.h	Add a "PadTo" field to the emitULEB128Bytes method. This will pad out to the	2010-04-18 00:51:49 +00:00
LatencyPriorityQueue.h	Eliminate the use of PriorityQueue and just use a std::vector,	2010-05-26 18:52:00 +00:00
LinkAllAsmWriterComponents.h
LinkAllCodegenComponents.h	Remove the local register allocator.	2010-06-15 21:58:33 +00:00
LiveInterval.h	Remove dead code.	2010-09-04 21:09:33 +00:00
LiveIntervalAnalysis.h	Remove trailing whitespace.	2010-08-12 20:01:23 +00:00
LiveStackAnalysis.h	Reapply r110396, with fixes to appease the Linux buildbot gods.	2010-08-06 18:33:48 +00:00
LiveVariables.h	Reapply r110396, with fixes to appease the Linux buildbot gods.	2010-08-06 18:33:48 +00:00
MachineBasicBlock.h	Add a getFirstNonPHI utility function.	2010-07-07 14:33:51 +00:00
MachineCodeEmitter.h
MachineCodeInfo.h
MachineConstantPool.h	Add const qualifiers to CodeGen's use of LLVM IR constructs.	2010-04-15 01:51:59 +00:00
MachineDominators.h	Add an isReachableFromEntry to MachineDominators, following the one	2010-04-05 19:16:38 +00:00
MachineFrameInfo.h	Add 'const' to getter function.	2010-09-03 18:17:16 +00:00
MachineFunction.h	Remove double-def checking from MachineVerifier, so a register does not have to	2010-08-05 18:59:59 +00:00
MachineFunctionAnalysis.h	Give MachineModuleInfo an actual Module*.	2010-04-06 00:51:52 +00:00
MachineFunctionPass.h	Reapply r110396, with fixes to appease the Linux buildbot gods.	2010-08-06 18:33:48 +00:00
MachineInstr.h	Rename DBG_LABEL PROLOG_LABEL, because it's only used during prolog emission and	2010-07-16 22:20:36 +00:00
MachineInstrBuilder.h	Add const qualifiers to CodeGen's use of LLVM IR constructs.	2010-04-15 01:51:59 +00:00
MachineJumpTableInfo.h	Add explicit keywords.	2010-06-18 19:04:37 +00:00
MachineLocation.h
MachineLoopInfo.h	Reapply r110396, with fixes to appease the Linux buildbot gods.	2010-08-06 18:33:48 +00:00
MachineMemOperand.h
MachineModuleInfo.h	Revert r108369, sorting llvm.dbg.declare information by source position,	2010-07-16 17:54:27 +00:00
MachineModuleInfoImpls.h
MachineOperand.h	Add a TargetRegisterInfo::composeSubRegIndices hook with a default	2010-05-28 18:18:53 +00:00
MachinePassRegistry.h
MachineRegisterInfo.h	Begin implementation of an inline spiller.	2010-06-29 23:58:39 +00:00
MachineRelocation.h
MachineSSAUpdater.h	Combine the implementations of the core part of the SSAUpdater and	2010-05-04 23:18:19 +00:00
MachORelocation.h
ObjectCodeEmitter.h
Passes.h	Stop using the dom frontier in DwarfEHPrepare by not promoting alloca's	2010-08-31 09:05:06 +00:00
PostRAHazardRecognizer.h	Add missing include to unbreak the build.	2010-06-14 22:44:26 +00:00
ProcessImplicitDefs.h	Reapply r110396, with fixes to appease the Linux buildbot gods.	2010-08-06 18:33:48 +00:00
PseudoSourceValue.h
RegAllocRegistry.h
RegisterCoalescer.h	Be more forgiving when calculating alias interference for physreg coalescing.	2010-07-06 20:31:51 +00:00
RegisterScavenging.h	After r107880, findSurvivorReg() no longer needs to be public.	2010-07-08 17:27:23 +00:00
RuntimeLibcalls.h	back-end libcall handling for ATOMIC_SWAP (__sync_lock_test_and_set)	2010-06-18 23:03:10 +00:00
ScheduleDAG.h	Change push_all to a non-virtual function and implement it in the	2010-05-26 01:10:55 +00:00
ScheduleHazardRecognizer.h
SchedulerRegistry.h	Add an ILP scheduler. This is a register pressure aware scheduler that's	2010-07-24 00:39:05 +00:00
SelectionDAG.h	zap unused method. x86 is the only user and already has a more powerfull version	2010-08-31 02:36:20 +00:00
SelectionDAGISel.h	implement rdar://6653118 - fastisel should fold loads where possible.	2010-09-05 02:18:34 +00:00
SelectionDAGNodes.h	Move ArgFlagsTy, OutputArg, and InputArg out of SelectionDAGNodes.h and	2010-07-07 15:28:42 +00:00
SlotIndexes.h	Fix a FIXME. The SlotIndex::Slot enum should be private.	2010-08-11 16:50:17 +00:00
TargetLoweringObjectFileImpl.h	nuke dead ivar which was supposed to be committed with r112496	2010-08-30 18:16:27 +00:00
ValueTypes.h	zap the now unused MVT::getIntVectorWithNumElements	2010-08-26 20:53:12 +00:00
ValueTypes.td	Adding a v8i64 512-bit vector type. This will be used to model ARM NEON intrinsics which translate into a pair of vld / vst instructions that can load / store 8 consecutive 64-bit (D) registers.	2010-05-13 23:55:47 +00:00