llvm-6502

mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-01-10 02:36:06 +00:00

History

Tim Northover ca396e391e IR: add a second ordering operand to cmpxhg for failure

The syntax for "cmpxchg" should now look something like:

	cmpxchg i32* %addr, i32 42, i32 3 acquire monotonic

where the second ordering argument gives the required semantics in the case
that no exchange takes place. It should be no stronger than the first ordering
constraint and cannot be either "release" or "acq_rel" (since no store will
have taken place).

rdar://problem/15996804

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203559 91177308-0d34-0410-b5e6-96231b3b80d8

2014-03-11 10:48:52 +00:00

IPA

[C++11] Add range based accessors for the Use-Def chain of a Value.

2014-03-09 03:16:01 +00:00

AliasAnalysis.cpp

IR: add a second ordering operand to cmpxhg for failure

2014-03-11 10:48:52 +00:00

AliasAnalysisCounter.cpp

[C++11] Add 'override' keyword to virtual methods that override their base class.

2014-03-05 07:30:04 +00:00

AliasAnalysisEvaluator.cpp

[C++11] Add 'override' keyword to virtual methods that override their base class.

2014-03-05 07:30:04 +00:00

AliasDebugger.cpp

[C++11] Add 'override' keyword to virtual methods that override their base class.

2014-03-05 07:30:04 +00:00

AliasSetTracker.cpp

[C++11] Add 'override' keyword to virtual methods that override their base class.

2014-03-05 07:30:04 +00:00

Analysis.cpp

[cleanup] Re-sort all the includes with utils/sort_includes.py.

2014-03-04 10:07:28 +00:00

BasicAliasAnalysis.cpp

[C++11] Add 'override' keyword to virtual methods that override their base class.

2014-03-05 07:30:04 +00:00

BlockFrequencyInfo.cpp

[Modules] Move CFG.h to the IR library as it defines graph traits over

2014-03-04 11:45:46 +00:00

BranchProbabilityInfo.cpp

[Modules] Move CFG.h to the IR library as it defines graph traits over

2014-03-04 11:45:46 +00:00

CaptureTracking.cpp

[C++11] Add range based accessors for the Use-Def chain of a Value.

2014-03-09 03:16:01 +00:00

CFG.cpp

Make succ_iterator a real random access iterator and clean up a couple of users.

2014-02-10 14:17:42 +00:00

CFGPrinter.cpp

[C++11] Add 'override' keyword to virtual methods that override their base class.

2014-03-05 07:30:04 +00:00

CMakeLists.txt

[PM] Add a new "lazy" call graph analysis pass for the new pass manager.

2014-02-06 04:37:03 +00:00

CodeMetrics.cpp

[Modules] Move CallSite into the IR library where it belogs. It is

2014-03-04 11:01:28 +00:00

ConstantFolding.cpp

Allow constant folding of round function whenever feasible

2014-03-07 04:36:21 +00:00

CostModel.cpp

[C++11] Add 'override' keyword to virtual methods that override their base class.

2014-03-05 07:30:04 +00:00

Delinearization.cpp

[C++11] Add 'override' keyword to virtual methods that override their base class.

2014-03-05 07:30:04 +00:00

DependenceAnalysis.cpp

[Modules] Move InstIterator out of the Support library, where it had no

2014-03-04 10:30:26 +00:00

DominanceFrontier.cpp

[PM] Split DominatorTree into a concrete analysis result object which

2014-01-13 13:07:17 +00:00

DomPrinter.cpp

[PM] Split DominatorTree into a concrete analysis result object which

2014-01-13 13:07:17 +00:00

InstCount.cpp

[Layering] Move InstVisitor.h into the IR library as it is pretty

2014-03-06 03:23:41 +00:00

InstructionSimplify.cpp

[C++11] Add range based accessors for the Use-Def chain of a Value.

2014-03-09 03:16:01 +00:00

Interval.cpp

[Modules] Move CFG.h to the IR library as it defines graph traits over

2014-03-04 11:45:46 +00:00

IntervalPartition.cpp

…

IVUsers.cpp

[C++11] Add range based accessors for the Use-Def chain of a Value.

2014-03-09 03:16:01 +00:00

LazyCallGraph.cpp

[LCG] Ran clang-format over this too and it pointed out some fixes.

2014-03-10 02:14:14 +00:00

LazyValueInfo.cpp

[C++11] Add 'override' keyword to virtual methods that override their base class.

2014-03-05 07:30:04 +00:00

LibCallAliasAnalysis.cpp

…

LibCallSemantics.cpp

…

Lint.cpp

Teach lint about address spaces

2014-03-06 17:33:55 +00:00

LLVMBuild.txt

…

Loads.cpp

…

LoopInfo.cpp

[C++11] Add range based accessors for the Use-Def chain of a Value.

2014-03-09 03:16:01 +00:00

LoopPass.cpp

[C++11] Add 'override' keyword to virtual methods that override their base class.

2014-03-05 07:30:04 +00:00

Makefile

…

MemDepPrinter.cpp

[C++11] Add 'override' keyword to virtual methods that override their base class.

2014-03-05 07:30:04 +00:00

MemoryBuiltins.cpp

[C++11] Add range based accessors for the Use-Def chain of a Value.

2014-03-09 03:16:01 +00:00

MemoryDependenceAnalysis.cpp

Replace OwningPtr<T> with std::unique_ptr<T>.

2014-03-06 05:51:42 +00:00

ModuleDebugInfoPrinter.cpp

[Layering] Move DebugInfo.h into the IR library where its implementation

2014-03-06 00:46:21 +00:00

NoAliasAnalysis.cpp

[C++11] Add 'override' keyword to virtual methods that override their base class.

2014-03-05 07:30:04 +00:00

PHITransAddr.cpp

[C++11] Add range based accessors for the Use-Def chain of a Value.

2014-03-09 03:16:01 +00:00

PostDominators.cpp

[Modules] Move CFG.h to the IR library as it defines graph traits over

2014-03-04 11:45:46 +00:00

PtrUseVisitor.cpp

[C++11] Add range based accessors for the Use-Def chain of a Value.

2014-03-09 03:16:01 +00:00

README.txt

…

RegionInfo.cpp

[C++11] Add a basic block range view for RegionInfo

2014-03-03 13:00:39 +00:00

RegionPass.cpp

[C++11] Add 'override' keyword to virtual methods that override their base class.

2014-03-05 07:30:04 +00:00

RegionPrinter.cpp

[C++11] Add a basic block range view for RegionInfo

2014-03-03 13:00:39 +00:00

ScalarEvolution.cpp

[C++11] Add range based accessors for the Use-Def chain of a Value.

2014-03-09 03:16:01 +00:00

ScalarEvolutionAliasAnalysis.cpp

[C++11] Add 'override' keyword to virtual methods that override their base class.

2014-03-05 07:30:04 +00:00

ScalarEvolutionExpander.cpp

[C++11] Add range based accessors for the Use-Def chain of a Value.

2014-03-09 03:16:01 +00:00

ScalarEvolutionNormalization.cpp

…

SparsePropagation.cpp

[C++11] Add range based accessors for the Use-Def chain of a Value.

2014-03-09 03:16:01 +00:00

TargetTransformInfo.cpp

[TTI] There is actually no realistic way to pop TTI implementations off

2014-03-10 02:45:14 +00:00

Trace.cpp

…

TypeBasedAliasAnalysis.cpp

[C++11] Add 'override' keyword to virtual methods that override their base class.

2014-03-05 07:30:04 +00:00

ValueTracking.cpp

[C++11] Add range based accessors for the Use-Def chain of a Value.

2014-03-09 03:16:01 +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.

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

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))

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