llvm-6502

mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-10-04 16:01:46 +00:00

History

Duncan Sands ac53a0b272 Introduce and use convenience methods for getting pointer types where the element is of a basic builtin type. For example, to get an i8* use getInt8PtrTy. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83379 91177308-0d34-0410-b5e6-96231b3b80d8		2009-10-06 15:40:36 +00:00
..
IPA	Extend the StartPassTimer and StopPassTimer functions so that the	2009-09-28 00:07:05 +00:00
AliasAnalysis.cpp
AliasAnalysisCounter.cpp
AliasAnalysisEvaluator.cpp
AliasDebugger.cpp
AliasSetTracker.cpp
Analysis.cpp
BasicAliasAnalysis.cpp
CaptureTracking.cpp
CFGPrinter.cpp
CMakeLists.txt
ConstantFolding.cpp	Extend ConstantFolding to understand signed overflow variants	2009-10-05 22:53:52 +00:00
DbgInfoPrinter.cpp	Remove std::string uses from DebugInfo interface.	2009-09-29 18:40:58 +00:00
DebugInfo.cpp	Expand api out in the usual inserter way, though, I do have a	2009-10-01 22:08:58 +00:00
InstCount.cpp
Interval.cpp
IntervalPartition.cpp
IVUsers.cpp
LibCallAliasAnalysis.cpp
LibCallSemantics.cpp
LiveValues.cpp
LoopDependenceAnalysis.cpp
LoopInfo.cpp	Move the dominator verification code out of special code embedded within	2009-09-28 00:27:48 +00:00
LoopPass.cpp	Fix this debug output to handle the case where the loop has been deleted.	2009-09-28 15:40:01 +00:00
LoopVR.cpp
Makefile
MallocHelper.cpp	Don't treat malloc calls with non-matching prototype as malloc.	2009-10-05 21:15:43 +00:00
MemoryDependenceAnalysis.cpp
PointerTracking.cpp	Introduce and use convenience methods for getting pointer types	2009-10-06 15:40:36 +00:00
PostDominators.cpp
ProfileEstimatorPass.cpp
ProfileInfo.cpp
ProfileInfoLoader.cpp
ProfileInfoLoaderPass.cpp
ProfileVerifierPass.cpp
README.txt	Create a README.txt for lib/Analysis, and add an entry.	2009-09-28 18:38:53 +00:00
ScalarEvolution.cpp
ScalarEvolutionAliasAnalysis.cpp
ScalarEvolutionExpander.cpp	Introduce and use convenience methods for getting pointer types	2009-10-06 15:40:36 +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.

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