6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-10-01 10:57:21 +00:00
Code Issues Projects Releases Wiki Activity
89e14c7579
llvm-6502/lib/Analysis
History
Duncan Sands 23a19572b2 Now that hasConstantValue has been made simpler, it may return the 
phi node itself if it occurs in an unreachable basic block.  Protect
against this.  Hopefully this will fix some more buildbots.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@119493 91177308-0d34-0410-b5e6-96231b3b80d8
2010-11-17 10:23:23 +00:00
..
IPA Make ModRefBehavior a lattice. Use this to clean up AliasAnalysis 2010-11-10 01:02:18 +00:00
AliasAnalysis.cpp Add helper functions for computing the Location of load, store, 2010-11-11 21:50:19 +00:00
AliasAnalysisCounter.cpp Extend the AliasAnalysis::pointsToConstantMemory interface to allow it 2010-11-08 16:45:26 +00:00
AliasAnalysisEvaluator.cpp Reapply r116831 and r116839, converting AliasAnalysis to use 2010-10-19 22:54:46 +00:00
AliasDebugger.cpp Extend the AliasAnalysis::pointsToConstantMemory interface to allow it 2010-11-08 16:45:26 +00:00
AliasSetTracker.cpp Don't forget the TBAA info, if available. 2010-11-11 21:27:26 +00:00
Analysis.cpp
BasicAliasAnalysis.cpp Make ModRefBehavior a lattice. Use this to clean up AliasAnalysis 2010-11-10 01:02:18 +00:00
CaptureTracking.cpp VAArg doesn't capture its operand. 2010-11-09 20:09:35 +00:00
CFGPrinter.cpp Get rid of static constructors for pass registration. Instead, every pass exposes an initializeMyPassFunction(), which 2010-10-19 17:21:58 +00:00
CMakeLists.txt Introduce DIBuilder. It is intended to be a front-end friendly interface to emit debuggging information entries in LLVM IR. 2010-11-04 15:01:38 +00:00
ConstantFolding.cpp Boost the power of phi node constant folding slightly: if all 2010-11-14 12:53:18 +00:00
DbgInfoPrinter.cpp Get rid of static constructors for pass registration. Instead, every pass exposes an initializeMyPassFunction(), which 2010-10-19 17:21:58 +00:00
DebugInfo.cpp Take care of special characters while creating named MDNode name to hold function specific local variable's info. 2010-11-10 22:19:21 +00:00
DIBuilder.cpp Use arrays instead of constant-sized SmallVectors. 2010-11-04 18:45:27 +00:00
DomPrinter.cpp Get rid of static constructors for pass registration. Instead, every pass exposes an initializeMyPassFunction(), which 2010-10-19 17:21:58 +00:00
InlineCost.cpp Now using a variant of the existing inlining heuristics to decide whether to create a given specialization of a function in PartialSpecialization. If the total performance bonus across all callsites passing the same constant exceeds the specialization cost, we create the specialization. 2010-10-09 22:06:36 +00:00
InstCount.cpp Get rid of static constructors for pass registration. Instead, every pass exposes an initializeMyPassFunction(), which 2010-10-19 17:21:58 +00:00
InstructionSimplify.cpp Previously SimplifyInstruction could report that an instruction 2010-11-17 08:35:29 +00:00
Interval.cpp
IntervalPartition.cpp Now with fewer extraneous semicolons! 2010-10-07 22:25:06 +00:00
IVUsers.cpp Get rid of static constructors for pass registration. Instead, every pass exposes an initializeMyPassFunction(), which 2010-10-19 17:21:58 +00:00
LazyValueInfo.cpp Now with fewer extraneous semicolons! 2010-10-07 22:25:06 +00:00
LibCallAliasAnalysis.cpp Now with fewer extraneous semicolons! 2010-10-07 22:25:06 +00:00
LibCallSemantics.cpp
Lint.cpp Now that hasConstantValue has been made simpler, it may return the 2010-11-17 10:23:23 +00:00
LiveValues.cpp Get rid of static constructors for pass registration. Instead, every pass exposes an initializeMyPassFunction(), which 2010-10-19 17:21:58 +00:00
Loads.cpp Reapply r116831 and r116839, converting AliasAnalysis to use 2010-10-19 22:54:46 +00:00
LoopDependenceAnalysis.cpp Begin adding static dependence information to passes, which will allow us to 2010-10-12 19:48:12 +00:00
LoopInfo.cpp Fix typo pointed out by Trevor Harmon. 2010-11-13 12:16:27 +00:00
LoopPass.cpp
Makefile
MemDepPrinter.cpp Add helper functions for computing the Location of load, store, 2010-11-11 21:50:19 +00:00
MemoryBuiltins.cpp
MemoryDependenceAnalysis.cpp Add helper functions for computing the Location of load, store, 2010-11-11 21:50:19 +00:00
ModuleDebugInfoPrinter.cpp Get rid of static constructors for pass registration. Instead, every pass exposes an initializeMyPassFunction(), which 2010-10-19 17:21:58 +00:00
NoAliasAnalysis.cpp Extend the AliasAnalysis::pointsToConstantMemory interface to allow it 2010-11-08 16:45:26 +00:00
PHITransAddr.cpp In which I discover the existence of loops. Threading an operation 2010-11-16 12:16:38 +00:00
PostDominators.cpp Begin adding static dependence information to passes, which will allow us to 2010-10-12 19:48:12 +00:00
ProfileEstimatorPass.cpp Get rid of static constructors for pass registration. Instead, every pass exposes an initializeMyPassFunction(), which 2010-10-19 17:21:58 +00:00
ProfileInfo.cpp Get rid of static constructors for pass registration. Instead, every pass exposes an initializeMyPassFunction(), which 2010-10-19 17:21:58 +00:00
ProfileInfoLoader.cpp
ProfileInfoLoaderPass.cpp Get rid of static constructors for pass registration. Instead, every pass exposes an initializeMyPassFunction(), which 2010-10-19 17:21:58 +00:00
ProfileVerifierPass.cpp Get rid of static constructors for pass registration. Instead, every pass exposes an initializeMyPassFunction(), which 2010-10-19 17:21:58 +00:00
README.txt
RegionInfo.cpp Make some symbols static, move classes into anonymous namespaces. 2010-10-22 17:35:07 +00:00
RegionPass.cpp Add RegionPass support. 2010-10-20 01:54:44 +00:00
RegionPrinter.cpp Get rid of static constructors for pass registration. Instead, every pass exposes an initializeMyPassFunction(), which 2010-10-19 17:21:58 +00:00
ScalarEvolution.cpp Have ScalarEvolution use SimplifyInstruction rather than hasConstantValue. 2010-11-17 04:18:45 +00:00
ScalarEvolutionAliasAnalysis.cpp Get rid of static constructors for pass registration. Instead, every pass exposes an initializeMyPassFunction(), which 2010-10-19 17:21:58 +00:00
ScalarEvolutionExpander.cpp
ScalarEvolutionNormalization.cpp
SparsePropagation.cpp
Trace.cpp
TypeBasedAliasAnalysis.cpp Re-disable TBAA for now; it broke MultiSource/Applications/JM/lencod, 2010-11-12 11:21:08 +00:00
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.

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

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))

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