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llvm-6502/lib/Analysis
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Chris Lattner e73a31f667 Stop building RTTI information for *most* llvm libraries. Notable 
missing ones are libsupport, libsystem and libvmcore.  libvmcore is
currently blocked on bugpoint, which uses EH.  Once it stops using
EH, we can switch it off.

This #if 0's out 3 unit tests, because gtest requires RTTI information.
Suggestions welcome on how to fix this.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94164 91177308-0d34-0410-b5e6-96231b3b80d8
2010-01-22 06:49:46 +00:00
..
IPA
Stop building RTTI information for *most* llvm libraries. Notable
2010-01-22 06:49:46 +00:00
AliasAnalysis.cpp
Partially address a README by having functionattrs consider calls to
2010-01-06 08:45:52 +00:00
AliasAnalysisCounter.cpp
drop the pass name from the output.
2010-01-22 05:52:51 +00:00
AliasAnalysisEvaluator.cpp
Change dbgs() back to errs() as Chris requested.
2009-12-23 22:49:57 +00:00
AliasDebugger.cpp
adopt getAdjustedAnalysisPointer in a few more passes.
2010-01-20 20:09:02 +00:00
AliasSetTracker.cpp
Change dbgs() back to errs() as Chris requested.
2009-12-23 22:49:57 +00:00
Analysis.cpp
"In order to ease automatic bindings generation, it would be helpful if boolean values were distinguishable from integers. The attached patch introduces "typedef int LLVMBool;", and uses LLVMBool instead of int throughout the C API, wherever a boolean value is called for."
2010-01-09 22:27:07 +00:00
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
fix PR5978 by peeling the loop so that we avoid shifting the
2010-01-08 19:02:23 +00:00
DbgInfoPrinter.cpp
Remove dead debug info intrinsics.
2010-01-05 01:10:40 +00:00
DebugInfo.cpp
Avoid unnecessary Elts array
2010-01-20 05:44:11 +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
Change dbgs() back to errs() as Chris requested.
2009-12-23 23:29:28 +00:00
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
Restore dump() methods to Loop and MachineLoop.
2010-01-05 21:08:02 +00:00
LoopPass.cpp
eliminate a bunch more unneeded dynamic_cast's.
2010-01-22 05:37:10 +00:00
Makefile
Stop building RTTI information for *most* llvm libraries. Notable
2010-01-22 06:49:46 +00:00
MemoryBuiltins.cpp
…
MemoryDependenceAnalysis.cpp
…
PHITransAddr.cpp
Change dbgs() back to errs() as Chris requested.
2009-12-23 23:27:15 +00:00
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
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
teach ComputeNumSignBits to look through PHI nodes.
2010-01-07 23:44:37 +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.

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