Michael Zolotukhin 7f4699ff8f [SimplifyCFG] Avoid quadratic on a predecessors number behavior in instruction sinking. ...

If a block has N predecessors, then the current algorithm will try to
sink common code to this block N times (whenever we visit a
predecessor). Every attempt to sink the common code includes going
through all predecessors, so the complexity of the algorithm becomes
O(N^2).
With this patch we try to sink common code only when we visit the block
itself. With this, the complexity goes down to O(N).
As a side effect, the moment the code is sunk is slightly different than
before (the order of simplifications has been changed), that's why I had
to adjust two tests (note that neither of the tests is supposed to test
SimplifyCFG):
* test/CodeGen/AArch64/arm64-jumptable.ll - changes in this test mimic
the changes that previous implementation of SimplifyCFG would do.
* test/CodeGen/ARM/avoid-cpsr-rmw.ll - in this test I disabled common
code sinking by a command line flag.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@321236 91177308-0d34-0410-b5e6-96231b3b80d8

2017-12-21 01:22:13 +00:00

..

AddDiscriminators.cpp

[Transforms] Fix some Clang-tidy modernize and Include What You Use warnings; other minor fixes (NFC).

2017-10-17 21:27:42 +00:00

ASanStackFrameLayout.cpp

[asan] Add a full redzone after every stack variable

2017-11-18 01:13:18 +00:00

BasicBlockUtils.cpp

Reverting [JumpThreading] Preservation of DT and LVI across the pass

2017-12-13 22:01:17 +00:00

BreakCriticalEdges.cpp

Remove redundant includes from lib/Transforms.

2017-12-13 21:31:01 +00:00

BuildLibCalls.cpp

Add argmononly attribute to strlen and wcslen, i.e. they only read memory (string) passed to them.

2017-06-18 03:10:26 +00:00

BypassSlowDivision.cpp

[BypassSlowDivision] Improve our handling of divisions by constants

2017-12-04 19:21:58 +00:00

CallPromotionUtils.cpp

[ICP] Expose unconditional call promotion interface

2017-12-20 19:26:37 +00:00

CloneFunction.cpp

Use a BumpPtrAllocator for Loop objects

2017-09-28 02:45:42 +00:00

CloneModule.cpp

Remove redundant includes from lib/Transforms.

2017-12-13 21:31:01 +00:00

CMakeLists.txt

[PGO] Make indirect call promotion a utility

2017-12-06 21:22:54 +00:00

CodeExtractor.cpp

[CodeExtractor] Add debug locations for new call and branch instrs.

2017-12-08 21:49:03 +00:00

CtorUtils.cpp

Remove redundant includes from lib/Transforms.

2017-12-13 21:31:01 +00:00

DemoteRegToStack.cpp

Sort the remaining #include lines in include/... and lib/....

2017-06-06 11:49:48 +00:00

EntryExitInstrumenter.cpp

EntryExitInstrumenter: set DebugLocs on the inserted call instructions (PR35412)

2017-11-28 18:44:26 +00:00

EscapeEnumerator.cpp

Suppress all uses of LLVM_END_WITH_NULL. NFC.

2017-05-09 19:31:13 +00:00

Evaluator.cpp

Add an @llvm.sideeffect intrinsic

2017-11-08 21:59:51 +00:00

FlattenCFG.cpp

[Transforms] Fix some Clang-tidy modernize and Include What You Use warnings; other minor fixes (NFC).

2017-10-26 00:55:39 +00:00

FunctionComparator.cpp

[Transforms] Fix some Clang-tidy modernize and Include What You Use warnings; other minor fixes (NFC).

2017-10-11 21:41:43 +00:00

FunctionImportUtils.cpp

Remove redundant includes from lib/Transforms.

2017-12-13 21:31:01 +00:00

GlobalStatus.cpp

Sort the remaining #include lines in include/... and lib/....

2017-06-06 11:49:48 +00:00

ImportedFunctionsInliningStatistics.cpp

[ThinLTO] Correct counting of functions in inliner stats

2017-03-24 17:59:06 +00:00

InlineFunction.cpp

[InlineFunction] Set debug loc for call to forward varargs.

2017-12-09 14:25:33 +00:00

InstructionNamer.cpp

Sort the remaining #include lines in include/... and lib/....

2017-06-06 11:49:48 +00:00

IntegerDivision.cpp

TransformUtils: Avoid getNodePtrUnchecked() in integer division, NFC

2016-02-21 20:14:29 +00:00

LCSSA.cpp

Mark all library options as hidden.

2017-12-01 00:53:10 +00:00

LibCallsShrinkWrap.cpp

[LibCallsShrinkWrap] Remove an unnecessary class member variable.

2017-04-26 21:28:40 +00:00

LLVMBuild.txt

[PM/AA] Remove the last relics of the separate IPA library from LLVM,

2015-08-18 17:51:53 +00:00

Local.cpp

fix typo in comment and remove inaccurate comment; NFC

2017-12-15 18:25:13 +00:00

LoopSimplify.cpp

Use a BumpPtrAllocator for Loop objects

2017-09-28 02:45:42 +00:00

LoopUnroll.cpp

Remove redundant includes from lib/Transforms.

2017-12-13 21:31:01 +00:00

LoopUnrollPeel.cpp

[Transforms] Fix some Clang-tidy modernize and Include What You Use warnings; other minor fixes (NFC).

2017-10-27 01:09:08 +00:00

LoopUnrollRuntime.cpp

Remove redundant includes from lib/Transforms.

2017-12-13 21:31:01 +00:00

LoopUtils.cpp

[LV] Support efficient vectorization of an induction with redundant casts

2017-12-14 07:56:31 +00:00

LoopVersioning.cpp

[LoopVersioning] Require loop-simplify form for loop versioning.

2016-12-19 17:13:37 +00:00

LowerInvoke.cpp

[PM] Port LowerInvoke to the new pass manager

2016-08-12 17:28:27 +00:00

LowerMemIntrinsics.cpp

[Memcpy Loop Lowering] Remove the fixed int8 lowering.

2017-12-18 15:31:14 +00:00

LowerSwitch.cpp

[Transforms] Fix some Clang-tidy modernize and Include What You Use warnings; other minor fixes (NFC).

2017-10-21 00:57:46 +00:00

Mem2Reg.cpp

[Transforms] Fix some Clang-tidy modernize and Include What You Use warnings; other minor fixes (NFC).

2017-10-26 00:55:39 +00:00

MetaRenamer.cpp

[Transforms] Fix some Clang-tidy modernize and Include What You Use warnings; other minor fixes (NFC).

2017-10-27 01:09:08 +00:00

ModuleUtils.cpp

ModuleUtils: Stop using comdat members to generate unique module ids.

2017-10-05 21:54:53 +00:00

NameAnonGlobals.cpp

Use StringRef in Pass/PassManager APIs (NFC)

2016-10-01 02:56:57 +00:00

OrderedInstructions.cpp

Remove unneeded else from OrderedInstructions::dominates.

2017-06-29 17:01:03 +00:00

PredicateInfo.cpp

[PredicateInfo] Add comment about why we require stable sort

2017-11-17 00:43:24 +00:00

PromoteMemoryToRegister.cpp

This reverts commit r319096 and r319097.

2017-11-28 01:25:38 +00:00

SanitizerStats.cpp

Sort the remaining #include lines in include/... and lib/....

2017-06-06 11:49:48 +00:00

SimplifyCFG.cpp

[SimplifyCFG] Avoid quadratic on a predecessors number behavior in instruction sinking.

2017-12-21 01:22:13 +00:00

SimplifyIndVar.cpp

Remove redundant includes from lib/Transforms.

2017-12-13 21:31:01 +00:00

SimplifyInstructions.cpp

Rename OptimizationDiagnosticInfo.* to OptimizationRemarkEmitter.*

2017-10-09 23:19:02 +00:00

SimplifyLibCalls.cpp

[SimplifyLibCalls] Inline calls to cabs when it's safe to do so

2017-12-16 01:26:25 +00:00

SplitModule.cpp

Fix more inconsistent line endings. NFC.

2017-12-18 19:46:56 +00:00

SSAUpdater.cpp

[Transforms] Fix some Clang-tidy modernize and Include What You Use warnings; other minor fixes (NFC).

2017-10-11 21:41:43 +00:00

StripGCRelocates.cpp

Sort the remaining #include lines in include/... and lib/....

2017-06-06 11:49:48 +00:00

StripNonLineTableDebugInfo.cpp

Sort the remaining #include lines in include/... and lib/....

2017-06-06 11:49:48 +00:00

SymbolRewriter.cpp

Mark all library options as hidden.

2017-12-01 00:53:10 +00:00

UnifyFunctionExitNodes.cpp

Remove redundant includes from lib/Transforms.

2017-12-13 21:31:01 +00:00

Utils.cpp

Sort the remaining #include lines in include/... and lib/....

2017-06-06 11:49:48 +00:00

ValueMapper.cpp

[Transforms] Fix some Clang-tidy modernize and Include What You Use warnings; other minor fixes (NFC).

2017-10-26 00:55:39 +00:00

VNCoercion.cpp

[IR] Make use of Type::isPtrOrPtrVectorTy/isIntOrIntVectorTy/isFPOrFPVectorTy to shorten code. NFC

2017-07-09 07:04:00 +00:00