llvm-6502/lib/Analysis
Chris Lattner 5d0cacdbb6 rename "elements" of metadata to "operands". "Elements" are
things that occur in types.  "operands" are things that occur
in values.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@92322 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-31 01:22:29 +00:00
..
IPA Change dbgs() back to errs() for assert messages as Chris requested. 2009-12-23 23:14:41 +00:00
AliasAnalysis.cpp
AliasAnalysisCounter.cpp Change dbgs() back to errs() as Chris requested. 2009-12-23 22:49:57 +00:00
AliasAnalysisEvaluator.cpp Change dbgs() back to errs() as Chris requested. 2009-12-23 22:49:57 +00:00
AliasDebugger.cpp
AliasSetTracker.cpp Change dbgs() back to errs() as Chris requested. 2009-12-23 22:49:57 +00:00
Analysis.cpp
BasicAliasAnalysis.cpp
CaptureTracking.cpp
CFGPrinter.cpp
CMakeLists.txt
ConstantFolding.cpp
DbgInfoPrinter.cpp
DebugInfo.cpp rename "elements" of metadata to "operands". "Elements" are 2009-12-31 01:22:29 +00:00
DomPrinter.cpp
InlineCost.cpp
InstCount.cpp Change dbgs() back to errs() as Chris requested. 2009-12-23 23:29:28 +00:00
InstructionSimplify.cpp
Interval.cpp
IntervalPartition.cpp
IVUsers.cpp Convert debug messages to use dbgs(). Generally this means 2009-12-23 20:20:46 +00:00
LazyValueInfo.cpp Convert debug messages to use dbgs(). Generally this means 2009-12-23 20:43:58 +00:00
LibCallAliasAnalysis.cpp
LibCallSemantics.cpp
LiveValues.cpp
LoopDependenceAnalysis.cpp Convert debug messages to use dbgs(). Generally this means 2009-12-23 20:52:41 +00:00
LoopInfo.cpp Add Loop contains utility methods for testing whether a loop 2009-12-18 01:24:09 +00:00
LoopPass.cpp
Makefile
MemoryBuiltins.cpp
MemoryDependenceAnalysis.cpp The phi translated pointer can be computed when returning a partially cached result 2009-12-22 04:25:02 +00:00
PHITransAddr.cpp Change dbgs() back to errs() as Chris requested. 2009-12-23 23:27:15 +00:00
PointerTracking.cpp
PostDominators.cpp Convert debug messages to use dbgs(). Generally this means 2009-12-23 21:16:54 +00:00
ProfileEstimatorPass.cpp Convert debug messages to use dbgs(). Generally this means 2009-12-23 21:27:29 +00:00
ProfileInfo.cpp Change dbgs() back to errs() for assert messages as Chris requested. 2009-12-23 22:59:29 +00:00
ProfileInfoLoader.cpp
ProfileInfoLoaderPass.cpp Change dbgs() back to errs() for assert messages as Chris requested. 2009-12-23 23:00:50 +00:00
ProfileVerifierPass.cpp Convert debug messages to use dbgs(). Generally this means 2009-12-23 22:10:20 +00:00
README.txt
ScalarEvolution.cpp Remove dump routine and the associated Debug.h from a header. Patch up 2009-12-23 22:58:38 +00:00
ScalarEvolutionAliasAnalysis.cpp
ScalarEvolutionExpander.cpp
SparsePropagation.cpp Convert debug messages to use dbgs(). Generally this means 2009-12-23 22:28:01 +00:00
Trace.cpp Convert debug messages to use dbgs(). Generally this means 2009-12-23 22:35:10 +00:00
ValueTracking.cpp

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.

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