llvm-6502

mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-11-04 06:09:05 +00:00

History

Benjamin Kramer 2774dc085d Missed some users of Value::getNameStr. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144656 91177308-0d34-0410-b5e6-96231b3b80d8		2011-11-15 18:30:06 +00:00
..
IPA	build: Add initial cut at LLVMBuild.txt files.	2011-11-03 18:53:17 +00:00
AliasAnalysis.cpp
AliasAnalysisCounter.cpp
AliasAnalysisEvaluator.cpp
AliasDebugger.cpp
AliasSetTracker.cpp
Analysis.cpp
BasicAliasAnalysis.cpp
BlockFrequencyInfo.cpp
BranchProbabilityInfo.cpp	Remove all remaining uses of Value::getNameStr().	2011-11-15 16:27:03 +00:00
CaptureTracking.cpp	Refactor capture tracking (which already had a couple flags for whether returns	2011-11-14 22:49:42 +00:00
CFGPrinter.cpp	Remove all remaining uses of Value::getNameStr().	2011-11-15 16:27:03 +00:00
CMakeLists.txt
ConstantFolding.cpp
DbgInfoPrinter.cpp
DebugInfo.cpp
DIBuilder.cpp	Fix typo in comment.	2011-11-09 22:45:04 +00:00
DominanceFrontier.cpp
DomPrinter.cpp
InlineCost.cpp
InstCount.cpp
InstructionSimplify.cpp	Fix code to match comment. Fixes PR11340, a regression from r143209.	2011-11-08 21:08:02 +00:00
Interval.cpp
IntervalPartition.cpp
IVUsers.cpp
LazyValueInfo.cpp
LibCallAliasAnalysis.cpp
LibCallSemantics.cpp
Lint.cpp
LLVMBuild.txt	build: Add initial cut at LLVMBuild.txt files.	2011-11-03 18:53:17 +00:00
Loads.cpp
LoopDependenceAnalysis.cpp
LoopInfo.cpp
LoopPass.cpp
Makefile
MemDepPrinter.cpp
MemoryBuiltins.cpp
MemoryDependenceAnalysis.cpp	Refactor capture tracking (which already had a couple flags for whether returns	2011-11-14 22:49:42 +00:00
ModuleDebugInfoPrinter.cpp
NoAliasAnalysis.cpp
PathNumbering.cpp
PathProfileInfo.cpp
PathProfileVerifier.cpp	Remove all remaining uses of Value::getNameStr().	2011-11-15 16:27:03 +00:00
PHITransAddr.cpp
PostDominators.cpp
ProfileEstimatorPass.cpp	Remove all remaining uses of Value::getNameStr().	2011-11-15 16:27:03 +00:00
ProfileInfo.cpp
ProfileInfoLoader.cpp
ProfileInfoLoaderPass.cpp	Remove all remaining uses of Value::getNameStr().	2011-11-15 16:27:03 +00:00
ProfileVerifierPass.cpp	Remove all remaining uses of Value::getNameStr().	2011-11-15 16:27:03 +00:00
README.txt
RegionInfo.cpp	Missed some users of Value::getNameStr.	2011-11-15 18:30:06 +00:00
RegionPass.cpp
RegionPrinter.cpp
ScalarEvolution.cpp	Don't try to loop on iterators that are potentially invalidated inside the loop. Fixes PR11361!	2011-11-12 03:09:12 +00:00
ScalarEvolutionAliasAnalysis.cpp
ScalarEvolutionExpander.cpp
ScalarEvolutionNormalization.cpp
SparsePropagation.cpp	Remove all remaining uses of Value::getNameStr().	2011-11-15 16:27:03 +00:00
Trace.cpp	Remove all remaining uses of Value::getNameStr().	2011-11-15 16:27:03 +00:00
TypeBasedAliasAnalysis.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.

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

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))

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