llvm-6502

mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-12-22 07:32:48 +00:00

History

Chris Lattner 43b5f9312d make -fno-rtti the default unless a directory builds with REQUIRES_RTTI. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94378 91177308-0d34-0410-b5e6-96231b3b80d8		2010-01-24 20:43:08 +00:00
..
IPA	make -fno-rtti the default unless a directory builds with REQUIRES_RTTI.	2010-01-24 20:43:08 +00:00
AliasAnalysis.cpp
AliasAnalysisCounter.cpp	drop the pass name from the output.	2010-01-22 05:52:51 +00:00
AliasAnalysisEvaluator.cpp
AliasDebugger.cpp	adopt getAdjustedAnalysisPointer in a few more passes.	2010-01-20 20:09:02 +00:00
AliasSetTracker.cpp
Analysis.cpp
BasicAliasAnalysis.cpp	add some new methods to adjust this pointers. Not used yet.	2010-01-20 19:26:14 +00:00
CaptureTracking.cpp
CFGPrinter.cpp
CMakeLists.txt
ConstantFolding.cpp
DbgInfoPrinter.cpp
DebugInfo.cpp	Avoid using "Type" as the variable name.	2010-01-23 00:26:28 +00:00
DomPrinter.cpp	Create Generic DOTGraphTraits Printer/Viewer	2010-01-16 10:56:41 +00:00
InlineCost.cpp	Pad my commit stats by reducing indentation in this now separate	2010-01-14 23:00:10 +00:00
InstCount.cpp
InstructionSimplify.cpp
Interval.cpp
IntervalPartition.cpp
IVUsers.cpp	Re-implement the main strength-reduction portion of LoopStrengthReduction.	2010-01-21 02:09:26 +00:00
LazyValueInfo.cpp
LibCallAliasAnalysis.cpp
LibCallSemantics.cpp
LiveValues.cpp
LoopDependenceAnalysis.cpp
LoopInfo.cpp
LoopPass.cpp	eliminate a bunch more unneeded dynamic_cast's.	2010-01-22 05:37:10 +00:00
Makefile	make -fno-rtti the default unless a directory builds with REQUIRES_RTTI.	2010-01-24 20:43:08 +00:00
MemoryBuiltins.cpp
MemoryDependenceAnalysis.cpp
PHITransAddr.cpp
PointerTracking.cpp
PostDominators.cpp
ProfileEstimatorPass.cpp	adopt getAdjustedAnalysisPointer in a few more passes.	2010-01-20 20:09:02 +00:00
ProfileInfo.cpp	adopt getAdjustedAnalysisPointer in a few more passes.	2010-01-20 20:09:02 +00:00
ProfileInfoLoader.cpp
ProfileInfoLoaderPass.cpp	adopt getAdjustedAnalysisPointer in a few more passes.	2010-01-20 20:09:02 +00:00
ProfileVerifierPass.cpp
README.txt
ScalarEvolution.cpp	Re-implement the main strength-reduction portion of LoopStrengthReduction.	2010-01-21 02:09:26 +00:00
ScalarEvolutionAliasAnalysis.cpp	adopt getAdjustedAnalysisPointer in a few more passes.	2010-01-20 20:09:02 +00:00
ScalarEvolutionExpander.cpp	When re-using an existing cast for a user, it's still necessary to call	2010-01-21 10:08:42 +00:00
SparsePropagation.cpp
Trace.cpp
ValueTracking.cpp

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.

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