Wan Xiaofei 887f9c5ec1 Quick look-up for block in loop. ... This patch implements quick look-up for block in loop by maintaining a hash set for blocks. It improves the efficiency of loop analysis a lot, the biggest improvement could be 5-6%(458.sjeng). Below are the compilation time for our benchmark in llc before & after the patch. Benchmark llc - trunk llc - patched 401.bzip2 0.339081 100.00% 0.329657 102.86% 403.gcc 19.853966 100.00% 19.605466 101.27% 429.mcf 0.049823 100.00% 0.048451 102.83% 433.milc 0.514898 100.00% 0.510217 100.92% 444.namd 1.109328 100.00% 1.103481 100.53% 445.gobmk 4.988028 100.00% 4.929114 101.20% 456.hmmer 0.843871 100.00% 0.825865 102.18% 458.sjeng 0.754238 100.00% 0.714095 105.62% 464.h264ref 2.9668 100.00% 2.90612 102.09% 471.omnetpp 4.556533 100.00% 4.511886 100.99% bitmnp01 0.038168 100.00% 0.0357 106.91% idctrn01 0.037745 100.00% 0.037332 101.11% libquake2 3.78689 100.00% 3.76209 100.66% libquake_ 2.251525 100.00% 2.234104 100.78% linpack 0.033159 100.00% 0.032788 101.13% matrix01 0.045319 100.00% 0.043497 104.19% nbench 0.333161 100.00% 0.329799 101.02% tblook01 0.017863 100.00% 0.017666 101.12% ttsprk01 0.054337 100.00% 0.053057 102.41% Reviewer : Andrew Trick <atrick@apple.com>, Hal Finkel <hfinkel@anl.gov> Approver : Andrew Trick <atrick@apple.com> Test : Pass make check-all & llvm test-suite git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@193460 91177308-0d34-0410-b5e6-96231b3b80d8		2013-10-26 03:08:02 +00:00
..
BasicBlockUtils.cpp	UpdatePHINodes in BasicBlockUtils should not crash on duplicate predecessors	2013-10-04 23:41:05 +00:00
BreakCriticalEdges.cpp	Remove the very substantial, largely unmaintained legacy PGO	2013-10-02 15:42:23 +00:00
BuildLibCalls.cpp
BypassSlowDivision.cpp
CloneFunction.cpp
CloneModule.cpp
CMakeLists.txt	Optimize more linkonce_odr values during LTO.	2013-10-21 17:14:55 +00:00
CmpInstAnalysis.cpp
CodeExtractor.cpp	Revert patches to add case-range support for PR1255.	2013-09-09 19:14:35 +00:00
DemoteRegToStack.cpp	Reimplement isPotentiallyReachable to make nocapture deduction much stronger.	2013-07-27 01:24:00 +00:00
FlattenCFG.cpp	Convert manual insert point restores to the new RAII object.	2013-09-30 15:40:17 +00:00
GlobalStatus.cpp	Handle calls and invokes in GlobalStatus.	2013-10-25 21:29:52 +00:00
InlineFunction.cpp	Inliner: Handle readonly attribute per argument when adding memcpy	2013-10-24 16:38:33 +00:00
InstructionNamer.cpp
IntegerDivision.cpp
LCSSA.cpp	Quick look-up for block in loop.	2013-10-26 03:08:02 +00:00
LLVMBuild.txt
Local.cpp	Don't eliminate a partially redundant load if it's in a landing pad.	2013-10-21 04:09:17 +00:00
LoopSimplify.cpp
LoopUnroll.cpp	Replace some unnecessary vector copies with references.	2013-09-15 22:04:42 +00:00
LoopUnrollRuntime.cpp
LowerExpectIntrinsic.cpp	Fix spelling intruction -> instruction.	2013-09-28 11:46:15 +00:00
LowerInvoke.cpp	Remove several unused variables.	2013-10-01 13:32:03 +00:00
LowerSwitch.cpp	Revert patches to add case-range support for PR1255.	2013-09-09 19:14:35 +00:00
Makefile
Mem2Reg.cpp	Revert r187191, which broke opt -mem2reg on the testcases included in PR16867.	2013-08-13 22:51:58 +00:00
MetaRenamer.cpp	Add 'const' qualifier to some arrays.	2013-07-15 08:02:13 +00:00
ModuleUtils.cpp	Respect llvm.used in Internalize.	2013-07-25 03:23:25 +00:00
PromoteMemoryToRegister.cpp	Add a function object to compare the first or second component of a std::pair.	2013-08-24 12:54:27 +00:00
SimplifyCFG.cpp	SimplifyCFG: Don't duplicate calls to functions marked noduplicate v2	2013-10-21 20:07:30 +00:00
SimplifyIndVar.cpp	Don't use a potentially expensive shift if all we want is one set bit.	2013-07-11 16:05:50 +00:00
SimplifyInstructions.cpp
SimplifyLibCalls.cpp	Use StringRef::npos for StringRef instead of std::string one	2013-09-10 00:41:53 +00:00
SpecialCaseList.cpp	Introduce SpecialCaseList::isIn overload for GlobalAliases.	2013-08-19 19:00:35 +00:00
SSAUpdater.cpp	Basic blocks typically have few predecessors. Use a SmallDenseMap to	2013-10-14 16:05:55 +00:00
UnifyFunctionExitNodes.cpp
Utils.cpp
ValueMapper.cpp