llvm-6502

mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-11-02 07:11:49 +00:00

History

Duncan P. N. Exon Smith e9139c68d4 blockfreq: Rename BlockFrequencyImpl to BlockFrequencyInfoImpl This is a shared implementation class for BlockFrequencyInfo and MachineBlockFrequencyInfo, not for BlockFrequency, a related (but distinct) class. No functionality change. <rdar://problem/14292693> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206083 91177308-0d34-0410-b5e6-96231b3b80d8		2014-04-11 23:20:58 +00:00
..
IPA	Handle vlas during inline cost computation if they'll be turned	2014-04-07 13:36:21 +00:00
AliasAnalysis.cpp	IR: add a second ordering operand to cmpxhg for failure	2014-03-11 10:48:52 +00:00
AliasAnalysisCounter.cpp	[C++11] Add 'override' keyword to virtual methods that override their base class.	2014-03-05 07:30:04 +00:00
AliasAnalysisEvaluator.cpp	[C++11] Add 'override' keyword to virtual methods that override their base class.	2014-03-05 07:30:04 +00:00
AliasDebugger.cpp	[C++11] Add 'override' keyword to virtual methods that override their base class.	2014-03-05 07:30:04 +00:00
AliasSetTracker.cpp	[C++11] Add 'override' keyword to virtual methods that override their base class.	2014-03-05 07:30:04 +00:00
Analysis.cpp	[cleanup] Re-sort all the includes with utils/sort_includes.py.	2014-03-04 10:07:28 +00:00
BasicAliasAnalysis.cpp	PR15967 Fix in basicaa for faulty returning no alias.	2014-03-26 21:30:19 +00:00
BlockFrequencyInfo.cpp	blockfreq: Rename BlockFrequencyImpl to BlockFrequencyInfoImpl	2014-04-11 23:20:58 +00:00
BranchProbabilityInfo.cpp	blockfreq: Use getSuccessorIndex()	2014-04-11 23:20:52 +00:00
CaptureTracking.cpp	[C++11] Add range based accessors for the Use-Def chain of a Value.	2014-03-09 03:16:01 +00:00
CFG.cpp	Simplify loop that worked around bugs in old GCC/Xcode.	2014-03-25 09:06:18 +00:00
CFGPrinter.cpp	[C++11] Add 'override' keyword to virtual methods that override their base class.	2014-03-05 07:30:04 +00:00
CMakeLists.txt	[PM] Add a new "lazy" call graph analysis pass for the new pass manager.	2014-02-06 04:37:03 +00:00
CodeMetrics.cpp	Consistent use of the noduplicate attribute.	2014-03-17 16:19:07 +00:00
ConstantFolding.cpp	Allow constant folding of ceil function whenever feasible	2014-03-24 04:36:06 +00:00
CostModel.cpp	[C++11] Add 'override' keyword to virtual methods that override their base class.	2014-03-05 07:30:04 +00:00
Delinearization.cpp	Delinearize: Extend informationin -analyze output	2014-04-09 07:53:49 +00:00
DependenceAnalysis.cpp	[Modules] Move InstIterator out of the Support library, where it had no	2014-03-04 10:30:26 +00:00
DominanceFrontier.cpp	[PM] Split DominatorTree into a concrete analysis result object which	2014-01-13 13:07:17 +00:00
DomPrinter.cpp	[PM] Split DominatorTree into a concrete analysis result object which	2014-01-13 13:07:17 +00:00
InstCount.cpp	[Layering] Move InstVisitor.h into the IR library as it is pretty	2014-03-06 03:23:41 +00:00
InstructionSimplify.cpp	[C++11] Add range based accessors for the Use-Def chain of a Value.	2014-03-09 03:16:01 +00:00
Interval.cpp	[Modules] Move CFG.h to the IR library as it defines graph traits over	2014-03-04 11:45:46 +00:00
IntervalPartition.cpp
IVUsers.cpp	PR17473:	2014-03-12 21:31:05 +00:00
LazyCallGraph.cpp	[LCG] Ran clang-format over this too and it pointed out some fixes.	2014-03-10 02:14:14 +00:00
LazyValueInfo.cpp	[C++11] Add 'override' keyword to virtual methods that override their base class.	2014-03-05 07:30:04 +00:00
LibCallAliasAnalysis.cpp	Move all of the header files which are involved in modelling the LLVM IR	2013-01-02 11:36:10 +00:00
LibCallSemantics.cpp	Move all of the header files which are involved in modelling the LLVM IR	2013-01-02 11:36:10 +00:00
Lint.cpp	Teach lint about address spaces	2014-03-06 17:33:55 +00:00
LLVMBuild.txt	LLVMBuild: Introduce a common section which currently has a list of the	2011-12-12 22:45:54 +00:00
Loads.cpp	Change GetPointerBaseWithConstantOffset's DataLayout argument from a	2013-01-31 02:00:45 +00:00
LoopInfo.cpp	Consistent use of the noduplicate attribute.	2014-03-17 16:19:07 +00:00
LoopPass.cpp	[C++11] Add 'override' keyword to virtual methods that override their base class.	2014-03-05 07:30:04 +00:00
Makefile
MemDepPrinter.cpp	[C++11] Add 'override' keyword to virtual methods that override their base class.	2014-03-05 07:30:04 +00:00
MemoryBuiltins.cpp	[C++11] Add range based accessors for the Use-Def chain of a Value.	2014-03-09 03:16:01 +00:00
MemoryDependenceAnalysis.cpp	Replace OwningPtr<T> with std::unique_ptr<T>.	2014-03-06 05:51:42 +00:00
ModuleDebugInfoPrinter.cpp	[C++11] Change DebugInfoFinder to use range-based loops	2014-03-18 09:41:07 +00:00
NoAliasAnalysis.cpp	[C++11] Add 'override' keyword to virtual methods that override their base class.	2014-03-05 07:30:04 +00:00
PHITransAddr.cpp	[C++11] Add range based accessors for the Use-Def chain of a Value.	2014-03-09 03:16:01 +00:00
PostDominators.cpp	[Modules] Move CFG.h to the IR library as it defines graph traits over	2014-03-04 11:45:46 +00:00
PtrUseVisitor.cpp	[C++11] Add range based accessors for the Use-Def chain of a Value.	2014-03-09 03:16:01 +00:00
README.txt
RegionInfo.cpp	[C++11] Add a basic block range view for RegionInfo	2014-03-03 13:00:39 +00:00
RegionPass.cpp	[C++11] Add 'override' keyword to virtual methods that override their base class.	2014-03-05 07:30:04 +00:00
RegionPrinter.cpp	[C++11] Add a basic block range view for RegionInfo	2014-03-03 13:00:39 +00:00
ScalarEvolution.cpp	divide by the result of the gcd	2014-04-08 21:21:13 +00:00
ScalarEvolutionAliasAnalysis.cpp	[C++11] Add 'override' keyword to virtual methods that override their base class.	2014-03-05 07:30:04 +00:00
ScalarEvolutionExpander.cpp	[C++11] Add range based accessors for the Use-Def chain of a Value.	2014-03-09 03:16:01 +00:00
ScalarEvolutionNormalization.cpp	Add stride normalization to SCEV Normalize/Denormalize transformation.	2014-03-18 17:34:03 +00:00
SparsePropagation.cpp	[C++11] Add range based accessors for the Use-Def chain of a Value.	2014-03-09 03:16:01 +00:00
TargetTransformInfo.cpp	Use TopTTI->getGEPCost from within getUserCost	2014-04-01 18:50:06 +00:00
Trace.cpp	Put the functionality for printing a value to a raw_ostream as an	2014-01-09 02:29:41 +00:00
TypeBasedAliasAnalysis.cpp	[C++11] Add 'override' keyword to virtual methods that override their base class.	2014-03-05 07:30:04 +00:00
ValueTracking.cpp	[C++11] Add range based accessors for the Use-Def chain of a Value.	2014-03-09 03:16:01 +00:00

README.txt

Analysis Opportunities:

//===---------------------------------------------------------------------===//

In test/Transforms/LoopStrengthReduce/quadradic-exit-value.ll, the
ScalarEvolution expression for %r is this:

  {1,+,3,+,2}<loop>

Outside the loop, this could be evaluated simply as (%n * %n), however
ScalarEvolution currently evaluates it as

  (-2 + (2 * (trunc i65 (((zext i64 (-2 + %n) to i65) * (zext i64 (-1 + %n) to i65)) /u 2) to i64)) + (3 * %n))

In addition to being much more complicated, it involves i65 arithmetic,
which is very inefficient when expanded into code.

//===---------------------------------------------------------------------===//

In formatValue in test/CodeGen/X86/lsr-delayed-fold.ll,

ScalarEvolution is forming this expression:

((trunc i64 (-1 * %arg5) to i32) + (trunc i64 %arg5 to i32) + (-1 * (trunc i64 undef to i32)))

This could be folded to

(-1 * (trunc i64 undef to i32))

//===---------------------------------------------------------------------===//