Andrew Trick 64925c55c6 Enable LSR IV Chains with sufficient heuristics. ... These heuristics are sufficient for enabling IV chains by default. Performance analysis has been done for i386, x86_64, and thumbv7. The optimization is rarely important, but can significantly speed up certain cases by eliminating spill code within the loop. Unrolled loops are prime candidates for IV chains. In many cases, the final code could still be improved with more target specific optimization following LSR. The goal of this feature is for LSR to make the best choice of induction variables. Instruction selection may not completely take advantage of this feature yet. As a result, there could be cases of slight code size increase. Code size can be worse on x86 because it doesn't support postincrement addressing. In fact, when chains are formed, you may see redundant address plus stride addition in the addressing mode. GenerateIVChains tries to compensate for the common cases. On ARM, code size increase can be mitigated by using postincrement addressing, but downstream codegen currently misses some opportunities. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147826 91177308-0d34-0410-b5e6-96231b3b80d8		2012-01-10 01:45:08 +00:00
..
ADCE.cpp	The landingpad instruction isn't dead simply because it's value isn't used.	2011-08-19 21:52:06 +00:00
BasicBlockPlacement.cpp	Get rid of static constructors for pass registration. Instead, every pass exposes an initializeMyPassFunction(), which	2010-10-19 17:21:58 +00:00
CMakeLists.txt	build/CMake: Finish removal of add_llvm_library_dependencies.	2011-11-29 19:25:30 +00:00
CodeGenPrepare.cpp	Propagate TargetLibraryInfo throughout ConstantFolding.cpp and	2011-12-01 03:08:23 +00:00
ConstantProp.cpp	Last bit of TargetLibraryInfo propagation. Also fixed a case for TargetData	2011-12-01 21:29:16 +00:00
CorrelatedValuePropagation.cpp	Don't include Operator.h from InstrTypes.h.	2011-04-11 09:35:34 +00:00
DCE.cpp	Remove unused STL header includes.	2011-04-23 19:53:52 +00:00
DeadStoreElimination.cpp	Fix infinite loop in DSE when deleting a free in a reachable loop that's also	2011-12-08 22:36:35 +00:00
EarlyCSE.cpp	Propagate TargetLibraryInfo throughout ConstantFolding.cpp and	2011-12-01 03:08:23 +00:00
GlobalMerge.cpp	Make GlobalMerge honor the preferred alignment on globals without an explicitly specified alignment.	2011-11-30 21:54:15 +00:00
GVN.cpp	Propagate TargetLibraryInfo throughout ConstantFolding.cpp and	2011-12-01 03:08:23 +00:00
IndVarSimplify.cpp	Indvars: guard against exponential behavior in isHighCostExpansion.	2011-12-12 22:46:16 +00:00
JumpThreading.cpp	SplitBlockPredecessors uses ArrayRef instead of Data and Size.	2011-12-09 21:19:53 +00:00
LICM.cpp	Move Instruction::isSafeToSpeculativelyExecute out of VMCore and	2011-12-14 23:49:11 +00:00
LLVMBuild.txt	LLVMBuild: Remove trailing newline, which irked me.	2011-12-12 19:48:00 +00:00
LoopDeletion.cpp	Don't use PN->replaceUsesOfWith() to change a PHINode's incoming blocks,	2011-06-21 10:02:43 +00:00
LoopIdiomRecognize.cpp	Correct grammar.	2011-09-13 00:44:16 +00:00
LoopInstSimplify.cpp	Propagate TargetLibraryInfo throughout ConstantFolding.cpp and	2011-12-01 03:08:23 +00:00
LoopRotation.cpp	Make better use of the PHINode API.	2011-06-20 14:18:48 +00:00
LoopStrengthReduce.cpp	Enable LSR IV Chains with sufficient heuristics.	2012-01-10 01:45:08 +00:00
LoopUnrollPass.cpp	Add -unroll-runtime for unrolling loops with run-time trip counts.	2011-12-09 06:19:40 +00:00
LoopUnswitch.cpp	Fix typo "infinte".	2011-12-23 23:49:25 +00:00
LowerAtomic.cpp	Remove the old atomic instrinsics. autoupgrade functionality is included with this patch.	2011-10-06 23:20:49 +00:00
Makefile	make -fno-rtti the default unless a directory builds with REQUIRES_RTTI.	2010-01-24 20:43:08 +00:00
MemCpyOptimizer.cpp	Update comment.	2011-12-05 22:53:09 +00:00
ObjCARC.cpp	Fix a copy+pasto. No testcase, because the symptoms of dereferencing	2011-12-21 21:43:50 +00:00
Reassociate.cpp	Silence a bunch (but not all) "variable written but not read" warnings	2011-08-12 14:54:45 +00:00
Reg2Mem.cpp	Fix a ton of comment typos found by codespell. Patch by	2011-04-15 05:18:47 +00:00
Scalar.cpp	Remove the old tail duplication pass. It is not used and is unable to update	2011-08-30 23:03:45 +00:00
ScalarReplAggregates.cpp	Fix warning.	2011-12-26 23:12:42 +00:00
SCCP.cpp	Last bit of TargetLibraryInfo propagation. Also fixed a case for TargetData	2011-12-01 21:29:16 +00:00
SimplifyCFGPass.cpp	Convert CallInst and InvokeInst APIs to use ArrayRef.	2011-07-15 08:37:34 +00:00
SimplifyLibCalls.cpp	Turn cos(-x) into cos(x). Patch by Alexander Malyshev!	2011-12-27 18:25:50 +00:00
Sink.cpp	Move Instruction::isSafeToSpeculativelyExecute out of VMCore and	2011-12-14 23:49:11 +00:00
TailRecursionElimination.cpp	Correct over-zealous removal of hack.	2011-10-17 18:43:40 +00:00