llvm/lib/Analysis
2010-08-16 16:16:11 +00:00
..
IPA Reapply r110396, with fixes to appease the Linux buildbot gods. 2010-08-06 18:33:48 +00:00
AliasAnalysis.cpp Implement a proper getModRefInfo for va_arg. 2010-08-06 18:24:38 +00:00
AliasAnalysisCounter.cpp Reapply r110396, with fixes to appease the Linux buildbot gods. 2010-08-06 18:33:48 +00:00
AliasAnalysisEvaluator.cpp Reapply r110396, with fixes to appease the Linux buildbot gods. 2010-08-06 18:33:48 +00:00
AliasDebugger.cpp Reapply r110396, with fixes to appease the Linux buildbot gods. 2010-08-06 18:33:48 +00:00
AliasSetTracker.cpp Reapply r110396, with fixes to appease the Linux buildbot gods. 2010-08-06 18:33:48 +00:00
Analysis.cpp
BasicAliasAnalysis.cpp Reapply r110396, with fixes to appease the Linux buildbot gods. 2010-08-06 18:33:48 +00:00
CaptureTracking.cpp simplify 2010-07-28 10:57:28 +00:00
CFGPrinter.cpp Reapply r110396, with fixes to appease the Linux buildbot gods. 2010-08-06 18:33:48 +00:00
CMakeLists.txt Fix CMake build 2010-08-03 02:38:20 +00:00
ConstantFolding.cpp eliminate CallInst::ArgOffset 2010-07-16 09:38:02 +00:00
DbgInfoPrinter.cpp Reapply r110396, with fixes to appease the Linux buildbot gods. 2010-08-06 18:33:48 +00:00
DebugInfo.cpp Even if a variable has constant value all the time, it is still a variable in gdb's eyes. 2010-08-11 23:17:54 +00:00
DomPrinter.cpp Reapply r110396, with fixes to appease the Linux buildbot gods. 2010-08-06 18:33:48 +00:00
InlineCost.cpp use ImmutableCallSite for const-corrgoodness 2010-07-27 14:15:29 +00:00
InstCount.cpp Revert r111082. No warnings for this common pattern. 2010-08-15 10:27:23 +00:00
InstructionSimplify.cpp Fix PR7647, handling the case when 'To' ends up being 2010-07-15 06:36:08 +00:00
Interval.cpp
IntervalPartition.cpp Reapply r110396, with fixes to appease the Linux buildbot gods. 2010-08-06 18:33:48 +00:00
IVUsers.cpp Reapply r110396, with fixes to appease the Linux buildbot gods. 2010-08-06 18:33:48 +00:00
LazyValueInfo.cpp Fix a subtle use-after-free issue. 2010-08-11 22:36:04 +00:00
LibCallAliasAnalysis.cpp Thread const correctness through a bunch of AliasAnalysis interfaces and 2010-08-03 21:48:53 +00:00
LibCallSemantics.cpp Thread const correctness through a bunch of AliasAnalysis interfaces and 2010-08-03 21:48:53 +00:00
Lint.cpp Revert r111058, the lint check for indirectbr successors that aren't 2010-08-16 14:39:19 +00:00
LiveValues.cpp Reapply r110396, with fixes to appease the Linux buildbot gods. 2010-08-06 18:33:48 +00:00
Loads.cpp Move FindAvailableLoadedValue isSafeToLoadUnconditionally out of 2010-05-28 16:19:17 +00:00
LoopDependenceAnalysis.cpp Fix batch of converting RegisterPass<> to INTIALIZE_PASS(). 2010-07-21 22:09:45 +00:00
LoopInfo.cpp Eliminate getCanonicalInductionVariableIncrement's last user and 2010-07-23 21:34:51 +00:00
LoopPass.cpp Make LoopPass::getContainedPass return a LoopPass* instead of a Pass* 2010-08-11 20:34:43 +00:00
Makefile
MemoryBuiltins.cpp minor enhancement to llvm::isFreeCall API: return CallInst; no functional change 2010-06-23 21:51:12 +00:00
MemoryDependenceAnalysis.cpp Reapply r110396, with fixes to appease the Linux buildbot gods. 2010-08-06 18:33:48 +00:00
ModuleDebugInfoPrinter.cpp Reapply r110396, with fixes to appease the Linux buildbot gods. 2010-08-06 18:33:48 +00:00
PHITransAddr.cpp
PointerTracking.cpp Reapply r110396, with fixes to appease the Linux buildbot gods. 2010-08-06 18:33:48 +00:00
PostDominators.cpp Add INSTANTIATE_AG_PASS, which combines RegisterPass<> with RegisterAnalysisGroup<> for pass registration. 2010-07-21 23:07:00 +00:00
ProfileEstimatorPass.cpp Reapply r110396, with fixes to appease the Linux buildbot gods. 2010-08-06 18:33:48 +00:00
ProfileInfo.cpp Reapply r110396, with fixes to appease the Linux buildbot gods. 2010-08-06 18:33:48 +00:00
ProfileInfoLoader.cpp
ProfileInfoLoaderPass.cpp Reapply r110396, with fixes to appease the Linux buildbot gods. 2010-08-06 18:33:48 +00:00
ProfileVerifierPass.cpp Reapply r110396, with fixes to appease the Linux buildbot gods. 2010-08-06 18:33:48 +00:00
README.txt When checking whether the special handling for an addrec increment which 2010-04-26 21:46:36 +00:00
RegionInfo.cpp RegionInfo: Do not assert if a BB is not part of the dominance tree. 2010-08-10 09:54:35 +00:00
RegionPrinter.cpp Reapply r110396, with fixes to appease the Linux buildbot gods. 2010-08-06 18:33:48 +00:00
ScalarEvolution.cpp Use iterators instead of indices in simple cases. 2010-08-16 16:16:11 +00:00
ScalarEvolutionAliasAnalysis.cpp Reapply r110396, with fixes to appease the Linux buildbot gods. 2010-08-06 18:33:48 +00:00
ScalarEvolutionExpander.cpp Fix SCEVExpander::visitAddRecExpr so that it remembers the induction variable 2010-07-26 18:28:14 +00:00
ScalarEvolutionNormalization.cpp Fix SCEV denormalization of expressions where the exit value from 2010-07-20 17:06:20 +00:00
SparsePropagation.cpp
Trace.cpp
TypeBasedAliasAnalysis.cpp Reapply r110396, with fixes to appease the Linux buildbot gods. 2010-08-06 18:33:48 +00:00
ValueTracking.cpp use ArgOperand accessors 2010-06-23 23:38:07 +00:00

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))

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