llvm-6502

mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-07-16 11:24:39 +00:00

Files

Chris Lattner b053fc1c92 fold comparisons of gep'd alloca points with null to false,

implementing PR12013.  We now compile the testcase to:

__Z4testv:                              ## @_Z4testv
## BB#0:                                ## %_ZN4llvm15SmallVectorImplIiE9push_backERKi.exit
	pushq	%rbx
	subq	$64, %rsp
	leaq	32(%rsp), %rbx
	movq	%rbx, (%rsp)
	leaq	64(%rsp), %rax
	movq	%rax, 16(%rsp)
	movl	$1, 32(%rsp)
	leaq	36(%rsp), %rax
	movq	%rax, 8(%rsp)
	leaq	(%rsp), %rdi
	callq	__Z1gRN4llvm11SmallVectorIiLj8EEE
	movq	(%rsp), %rdi
	cmpq	%rbx, %rdi
	je	LBB0_2
## BB#1:
	callq	_free
LBB0_2:                                 ## %_ZN4llvm11SmallVectorIiLj8EED1Ev.exit
	addq	$64, %rsp
	popq	%rbx
	ret

instead of:

__Z4testv:                              ## @_Z4testv
## BB#0:
	pushq	%rbx
	subq	$64, %rsp
	xorl	%eax, %eax
	leaq	(%rsp), %rbx
	addq	$32, %rbx
	movq	%rbx, (%rsp)
	movq	%rbx, 8(%rsp)
	leaq	64(%rsp), %rcx
	movq	%rcx, 16(%rsp)
	je	LBB0_2
## BB#1:
	movl	$1, 32(%rsp)
	movq	%rbx, %rax
LBB0_2:                                 ## %_ZN4llvm15SmallVectorImplIiE9push_backERKi.exit
	addq	$4, %rax
	movq	%rax, 8(%rsp)
	leaq	(%rsp), %rdi
	callq	__Z1gRN4llvm11SmallVectorIiLj8EEE
	movq	(%rsp), %rdi
	cmpq	%rbx, %rdi
	je	LBB0_4
## BB#3:
	callq	_free
LBB0_4:                                 ## %_ZN4llvm11SmallVectorIiLj8EED1Ev.exit
	addq	$64, %rsp
	popq	%rbx
	ret

This doesn't shrink clang noticably though.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150944 91177308-0d34-0410-b5e6-96231b3b80d8

2012-02-20 00:42:49 +00:00

IPA

LLVMBuild: Remove trailing newline, which irked me.

2011-12-12 19:48:00 +00:00

AliasAnalysis.cpp

Enhance alias analysis for atomic instructions a bit. Upgrade a couple alias-analysis tests to the new atomic instructions.

2011-09-26 20:15:28 +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

Remove a comment about an alternative approach that wouldn't

2012-02-17 18:33:38 +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

Move includes to the .cpp file.

2012-01-17 22:16:31 +00:00

CFGPrinter.cpp

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

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

CMakeLists.txt

build/CMake: Finish removal of add_llvm_library_dependencies.

2011-11-29 19:25:30 +00:00

ConstantFolding.cpp

Convert assert(0) to llvm_unreachable

2012-02-07 05:05:23 +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

Remove tabs.

2012-02-08 00:17:07 +00:00

DIBuilder.cpp

Typo in variable name.

2012-02-17 07:08:46 +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

Use precomputed BB size instead of BB->size().

2012-01-25 18:54:13 +00:00

InstCount.cpp

…

InstructionSimplify.cpp

fold comparisons of gep'd alloca points with null to false,

2012-02-20 00:42:49 +00:00

Interval.cpp

…

IntervalPartition.cpp

…

IVUsers.cpp

Put all IVUsers in the processed set. Allow querying IVUsers with isIVUserOrOperand.

2012-01-06 21:41:55 +00:00

LazyValueInfo.cpp

SwitchInst refactoring.

2012-02-01 07:49:51 +00:00

LibCallAliasAnalysis.cpp

…

LibCallSemantics.cpp

…

Lint.cpp

Fix a few more places where TargetData/TargetLibraryInfo is not being passed.

2011-12-02 01:26:24 +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

Add some comments here because the lack of a check for volatile/atomic here is a bit unusual.

2011-08-15 21:56:39 +00:00

LoopDependenceAnalysis.cpp

More dead code removal (using -Wunreachable-code)

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

LoopInfo.cpp

Move Instruction::isSafeToSpeculativelyExecute out of VMCore and

2011-12-14 23:49:11 +00:00

LoopPass.cpp

Reapply r138695. Fix PassManager stack depths.

2011-08-29 17:07:00 +00:00

Makefile

…

MemDepPrinter.cpp

Fix a stupid typo in MemDepPrinter.

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

MemoryBuiltins.cpp

Validate the return type when checking if a function is malloc.

2011-11-23 17:58:47 +00:00

MemoryDependenceAnalysis.cpp

The patch resolves the conflict between AddressSanitizer and load widening (GVN).

2012-02-06 22:48:56 +00:00

ModuleDebugInfoPrinter.cpp

…

NoAliasAnalysis.cpp

…

PathNumbering.cpp

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

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

PathProfileInfo.cpp

…

PathProfileVerifier.cpp

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

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

PHITransAddr.cpp

More dead code removal (using -Wunreachable-code)

2012-01-20 21:51:11 +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

Missed some users of Value::getNameStr.

2011-11-15 18:30:06 +00:00

RegionPass.cpp

Reapply r138695. Fix PassManager stack depths.

2011-08-29 17:07:00 +00:00

RegionPrinter.cpp

…

ScalarEvolution.cpp

switch SCEV to use the new ConstantFoldLoadThroughGEPIndices function

2012-01-24 05:49:24 +00:00

ScalarEvolutionAliasAnalysis.cpp

…

ScalarEvolutionExpander.cpp

Temporarily disable this assert. Looks like it found a similar issue when

2012-02-18 17:51:43 +00:00

ScalarEvolutionNormalization.cpp

More dead code removal (using -Wunreachable-code)

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

SparsePropagation.cpp

SwitchInst refactoring.

2012-02-01 07:49:51 +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

Remove some dead code and tidy things up now that vectors use ConstantDataVector

2012-02-06 21:56:39 +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))

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