llvm-6502/lib/Analysis
Bob Wilson a0be09f511 Add LLVMContext::emitWarning methods and use them. <rdar://problem/12867368>
When the backend is used from clang, it should produce proper diagnostics
instead of just printing messages to errs(). Other clients may also want to
register their own error handlers with the LLVMContext, and the same handler
should work for warnings in the same way as the existing emitError methods.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171041 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-24 18:15:21 +00:00
..
IPA Use the new script to sort the includes of every file under lib. 2012-12-03 16:50:05 +00:00
AliasAnalysis.cpp Rename the 'Attributes' class to 'Attribute'. It's going to represent a single attribute in the future. 2012-12-19 07:18:57 +00:00
AliasAnalysisCounter.cpp Use the new script to sort the includes of every file under lib. 2012-12-03 16:50:05 +00:00
AliasAnalysisEvaluator.cpp Use the new script to sort the includes of every file under lib. 2012-12-03 16:50:05 +00:00
AliasDebugger.cpp Use the new script to sort the includes of every file under lib. 2012-12-03 16:50:05 +00:00
AliasSetTracker.cpp Use the new script to sort the includes of every file under lib. 2012-12-03 16:50:05 +00:00
Analysis.cpp Use the new script to sort the includes of every file under lib. 2012-12-03 16:50:05 +00:00
BasicAliasAnalysis.cpp Optimistically analyse Phi cycles 2012-12-10 23:02:41 +00:00
BlockFrequencyInfo.cpp Use the new script to sort the includes of every file under lib. 2012-12-03 16:50:05 +00:00
BranchProbabilityInfo.cpp Use the new script to sort the includes of every file under lib. 2012-12-03 16:50:05 +00:00
CaptureTracking.cpp Give CaptureTracker::shouldExplore a base implementation. Most users want to do 2012-10-08 22:12:48 +00:00
CFGPrinter.cpp Use the new script to sort the includes of every file under lib. 2012-12-03 16:50:05 +00:00
CMakeLists.txt Add a new visitor for walking the uses of a pointer value. 2012-12-10 08:28:39 +00:00
CodeMetrics.cpp Add a new attribute, 'noduplicate'. If a function contains a noduplicate call, the call cannot be duplicated - Jump threading, loop unrolling, loop unswitching, and loop rotation are inhibited if they would duplicate the call. 2012-12-20 16:04:27 +00:00
ConstantFolding.cpp Use the new script to sort the includes of every file under lib. 2012-12-03 16:50:05 +00:00
CostModel.cpp Update the docs of the cost model. 2012-12-24 05:51:12 +00:00
DbgInfoPrinter.cpp Use the new script to sort the includes of every file under lib. 2012-12-03 16:50:05 +00:00
DependenceAnalysis.cpp Use the new script to sort the includes of every file under lib. 2012-12-03 16:50:05 +00:00
DominanceFrontier.cpp Use the new script to sort the includes of every file under lib. 2012-12-03 16:50:05 +00:00
DomPrinter.cpp
InlineCost.cpp Add a new attribute, 'noduplicate'. If a function contains a noduplicate call, the call cannot be duplicated - Jump threading, loop unrolling, loop unswitching, and loop rotation are inhibited if they would duplicate the call. 2012-12-20 16:04:27 +00:00
InstCount.cpp Use the new script to sort the includes of every file under lib. 2012-12-03 16:50:05 +00:00
InstructionSimplify.cpp Rename isPowerOfTwo to isKnownToBeAPowerOfTwo. 2012-12-13 03:37:24 +00:00
Interval.cpp Revert 'Fix a typo 'iff' => 'if''. iff is an abreviation of if and only if. See: http://en.wikipedia.org/wiki/If_and_only_if Commit 164767 2012-09-27 10:14:43 +00:00
IntervalPartition.cpp
IVUsers.cpp Use the new script to sort the includes of every file under lib. 2012-12-03 16:50:05 +00:00
LazyValueInfo.cpp Use the new script to sort the includes of every file under lib. 2012-12-03 16:50:05 +00:00
LibCallAliasAnalysis.cpp Use the new script to sort the includes of every file under lib. 2012-12-03 16:50:05 +00:00
LibCallSemantics.cpp
Lint.cpp Use the new script to sort the includes of every file under lib. 2012-12-03 16:50:05 +00:00
LLVMBuild.txt
Loads.cpp Move TargetData to DataLayout. 2012-10-08 16:38:25 +00:00
LoopInfo.cpp Add a new attribute, 'noduplicate'. If a function contains a noduplicate call, the call cannot be duplicated - Jump threading, loop unrolling, loop unswitching, and loop rotation are inhibited if they would duplicate the call. 2012-12-20 16:04:27 +00:00
LoopPass.cpp Enable the new LoopInfo algorithm by default. 2012-06-26 04:11:38 +00:00
Makefile
MemDepPrinter.cpp Use the new script to sort the includes of every file under lib. 2012-12-03 16:50:05 +00:00
MemoryBuiltins.cpp Rename the 'Attributes' class to 'Attribute'. It's going to represent a single attribute in the future. 2012-12-19 07:18:57 +00:00
MemoryDependenceAnalysis.cpp Rename the 'Attributes' class to 'Attribute'. It's going to represent a single attribute in the future. 2012-12-19 07:18:57 +00:00
ModuleDebugInfoPrinter.cpp Use the new script to sort the includes of every file under lib. 2012-12-03 16:50:05 +00:00
NoAliasAnalysis.cpp Use the new script to sort the includes of every file under lib. 2012-12-03 16:50:05 +00:00
PathNumbering.cpp Use the new script to sort the includes of every file under lib. 2012-12-03 16:50:05 +00:00
PathProfileInfo.cpp Use the new script to sort the includes of every file under lib. 2012-12-03 16:50:05 +00:00
PathProfileVerifier.cpp Use the new script to sort the includes of every file under lib. 2012-12-03 16:50:05 +00:00
PHITransAddr.cpp Use the new script to sort the includes of every file under lib. 2012-12-03 16:50:05 +00:00
PostDominators.cpp Use the new script to sort the includes of every file under lib. 2012-12-03 16:50:05 +00:00
ProfileDataLoader.cpp Use the new script to sort the includes of every file under lib. 2012-12-03 16:50:05 +00:00
ProfileDataLoaderPass.cpp Add LLVMContext::emitWarning methods and use them. <rdar://problem/12867368> 2012-12-24 18:15:21 +00:00
ProfileEstimatorPass.cpp Use the new script to sort the includes of every file under lib. 2012-12-03 16:50:05 +00:00
ProfileInfo.cpp Use the new script to sort the includes of every file under lib. 2012-12-03 16:50:05 +00:00
ProfileInfoLoader.cpp Use the new script to sort the includes of every file under lib. 2012-12-03 16:50:05 +00:00
ProfileInfoLoaderPass.cpp Add LLVMContext::emitWarning methods and use them. <rdar://problem/12867368> 2012-12-24 18:15:21 +00:00
ProfileVerifierPass.cpp Use the new script to sort the includes of every file under lib. 2012-12-03 16:50:05 +00:00
PtrUseVisitor.cpp Hoist the GEP constant address offset computation to a common home on 2012-12-11 10:29:10 +00:00
README.txt
RegionInfo.cpp Use the new script to sort the includes of every file under lib. 2012-12-03 16:50:05 +00:00
RegionPass.cpp Remove the the block_node_iterator of Region, replace it by the block_iterator. 2012-08-27 13:49:24 +00:00
RegionPrinter.cpp Use the new script to sort the includes of every file under lib. 2012-12-03 16:50:05 +00:00
ScalarEvolution.cpp Use the new script to sort the includes of every file under lib. 2012-12-03 16:50:05 +00:00
ScalarEvolutionAliasAnalysis.cpp Use the new script to sort the includes of every file under lib. 2012-12-03 16:50:05 +00:00
ScalarEvolutionExpander.cpp Use the new script to sort the includes of every file under lib. 2012-12-03 16:50:05 +00:00
ScalarEvolutionNormalization.cpp
SparsePropagation.cpp
Trace.cpp Use the new script to sort the includes of every file under lib. 2012-12-03 16:50:05 +00:00
TypeBasedAliasAnalysis.cpp Use the new script to sort the includes of every file under lib. 2012-12-03 16:50:05 +00:00
ValueTracking.cpp Remove trailing whitespace. 2012-12-22 19:15:35 +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))

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