llvm-6502

mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-03-31 11:32:42 +00:00

History

Andrew Trick 8aa22019ca SCEV: Add MarkPendingLoopPredicates to avoid recursive isImpliedCond.

getUDivExpr attempts to simplify by checking for overflow.
isLoopEntryGuardedByCond then evaluates the loop predicate which
may lead to the same getUDivExpr causing endless recursion.

Fixes PR12868: clang 3.2 segmentation fault.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157092 91177308-0d34-0410-b5e6-96231b3b80d8

2012-05-19 00:48:25 +00:00

IPA

Handle intrinsics in GlobalsModRef. Fixes pr12351.

2012-03-28 21:31:24 +00:00

AliasAnalysis.cpp

Move the capture analysis from MemoryDependencyAnalysis to a more general place

2012-05-14 20:35:04 +00:00

AliasAnalysisCounter.cpp

Persuade GCC that there is nothing worth warning about here (there isn't).

2012-02-05 14:20:11 +00:00

AliasAnalysisEvaluator.cpp

Remove unnecessary default cases in switches that cover all enum values.

2012-01-10 16:47:17 +00:00

AliasDebugger.cpp

…

AliasSetTracker.cpp

Have AliasSet::aliasesUnknownInst use pointer TBAA info when available

2012-02-10 15:52:39 +00:00

Analysis.cpp

C API functions must be able to see their extern "C" definitions, or it will be impossible to call them from C.

2011-08-19 01:36:54 +00:00

BasicAliasAnalysis.cpp

Duncan pointed out that if the alignment isn't explicitly specified, it defaults to the ABI alignment. Given that, make this code a bit more aggressive in such cases.

2012-02-27 23:16:46 +00:00

BlockFrequencyInfo.cpp

Add some constantness to BranchProbabilityInfo and BlockFrequnencyInfo.

2011-12-20 20:03:10 +00:00

BranchProbabilityInfo.cpp

Make the unreachable probability much much heavier. The previous

2011-12-22 09:26:37 +00:00

CaptureTracking.cpp

Fix intendation.

2012-05-10 23:38:07 +00:00

CFGPrinter.cpp

Remove all remaining uses of Value::getNameStr().

2011-11-15 16:27:03 +00:00

CMakeLists.txt

Pull the implementation of the code metrics out of the inline cost

2012-03-16 05:51:52 +00:00

CodeMetrics.cpp

A pile of long over-due refactorings here. There are some very, *very*

2012-05-04 00:58:03 +00:00

ConstantFolding.cpp

Reapply r155682, making constant folding more consistent, with a fix to work

2012-04-27 17:50:22 +00:00

DbgInfoPrinter.cpp

Fix for DbgInfoPrinter.cpp:174:12: warning: ‘LineNo’ may be used uninitialized in this function.

2011-09-21 23:34:23 +00:00

DebugInfo.cpp

Add a line number for the scope of the function (starting at the first

2012-04-03 00:43:49 +00:00

DIBuilder.cpp

Clarify comment.

2012-05-18 00:16:22 +00:00

DominanceFrontier.cpp

Unweaken vtables as per http://llvm.org/docs/CodingStandards.html#ll_virtual_anch

2011-12-20 02:50:00 +00:00

DomPrinter.cpp

remove the blank line from previous ci.

2012-02-04 03:18:47 +00:00

InlineCost.cpp

A pile of long over-due refactorings here. There are some very, *very*

2012-05-04 00:58:03 +00:00

InstCount.cpp

…

InstructionSimplify.cpp

Remove extraneous ';'.

2012-05-17 20:27:58 +00:00

Interval.cpp

…

IntervalPartition.cpp

…

IVUsers.cpp

Cleanup IVUsers::addUsersIfInteresting.

2012-03-22 17:47:33 +00:00

LazyValueInfo.cpp

allow LazyValueInfo::getEdgeValue() to reason about multiple edges from the same switch instruction by doing union of ranges (which may still be conservative, but it's more aggressive than before)

2012-05-18 21:02:10 +00:00

LibCallAliasAnalysis.cpp

…

LibCallSemantics.cpp

…

Lint.cpp

Always compute all the bits in ComputeMaskedBits.

2012-04-04 12:51:34 +00:00

LLVMBuild.txt

LLVMBuild: Introduce a common section which currently has a list of the

2011-12-12 22:45:54 +00:00

Loads.cpp

enhance jump threading to preserve TBAA information when PRE'ing loads,

2012-03-13 18:07:41 +00:00

LoopDependenceAnalysis.cpp

More dead code removal (using -Wunreachable-code)

2012-01-20 21:51:11 +00:00

LoopInfo.cpp

Fix 12513: Loop unrolling breaks with indirect branches.

2012-04-10 05:14:42 +00:00

LoopPass.cpp

Take out the debug info probe stuff. It's making some changes to

2012-03-23 03:54:05 +00:00

Makefile

…

MemDepPrinter.cpp

Fix a stupid typo in MemDepPrinter.

2011-12-14 02:54:39 +00:00

MemoryBuiltins.cpp

remove calls to calloc if the allocated memory is not used (it was already being done for malloc)

2012-05-03 22:08:19 +00:00

MemoryDependenceAnalysis.cpp

Move the capture analysis from MemoryDependencyAnalysis to a more general place

2012-05-14 20:35:04 +00:00

ModuleDebugInfoPrinter.cpp

…

NoAliasAnalysis.cpp

Use the new addEscapingValue callback to update GlobalsModRef when GVN adds PHIs of GEPs. For the moment,

2011-01-03 23:51:43 +00:00

PathNumbering.cpp

[unwind removal] We no longer have 'unwind' instructions being generated, so

2012-02-06 21:16:41 +00:00

PathProfileInfo.cpp

Implementation of path profiling.

2011-01-29 01:09:53 +00:00

PathProfileVerifier.cpp

Remove all remaining uses of Value::getNameStr().

2011-11-15 16:27:03 +00:00

PHITransAddr.cpp

Uniformize the InstructionSimplify interface by ensuring that all routines

2012-03-13 11:42:19 +00:00

PostDominators.cpp

remove postdom frontiers, because it is dead. Forward dom frontiers are

2011-04-05 21:57:17 +00:00

ProfileEstimatorPass.cpp

Remove all remaining uses of Value::getNameStr().

2011-11-15 16:27:03 +00:00

ProfileInfo.cpp

Fix a ton of comment typos found by codespell. Patch by

2011-04-15 05:18:47 +00:00

ProfileInfoLoader.cpp

Remove unused STL header includes.

2011-04-23 19:53:52 +00:00

ProfileInfoLoaderPass.cpp

Remove all remaining uses of Value::getNameStr().

2011-11-15 16:27:03 +00:00

ProfileVerifierPass.cpp

Move code into anonymous namespaces.

2011-11-26 23:01:57 +00:00

README.txt

…

RegionInfo.cpp

Rename the Region::block_iterator to Region::block_node_iterator, and

2012-05-04 20:55:23 +00:00

RegionPass.cpp

Rename the Region::block_iterator to Region::block_node_iterator, and

2012-05-04 20:55:23 +00:00

RegionPrinter.cpp

Rename the Region::block_iterator to Region::block_node_iterator, and

2012-05-04 20:55:23 +00:00

ScalarEvolution.cpp

SCEV: Add MarkPendingLoopPredicates to avoid recursive isImpliedCond.

2012-05-19 00:48:25 +00:00

ScalarEvolutionAliasAnalysis.cpp

…

ScalarEvolutionExpander.cpp

Fix this assert. IP can point to an instruction with strange dominance

2012-02-27 02:13:03 +00:00

ScalarEvolutionNormalization.cpp

More dead code removal (using -Wunreachable-code)

2012-01-20 21:51:11 +00:00

SparsePropagation.cpp

Taken into account Duncan's comments for r149481 dated by 2nd Feb 2012:

2012-03-08 07:06:20 +00:00

Trace.cpp

Remove all remaining uses of Value::getNameStr().

2011-11-15 16:27:03 +00:00

TypeBasedAliasAnalysis.cpp

Fix a ton of comment typos found by codespell. Patch by

2011-04-15 05:18:47 +00:00

ValueTracking.cpp

Teach DeadStoreElimination to eliminate exit-block stores with phi addresses.

2012-05-10 18:57:38 +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))

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