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path: root/lib/Transforms/Scalar/ObjCARC.cpp
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2012-01-17Add a new ObjC ARC optimization pass to eliminate unneededDan Gohman
autorelease push+pop pairs. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@148330 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-17Remove unreachable code. (replace with llvm_unreachable to help GCC where ↵David Blaikie
necessary) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@148284 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-14Fix an unused variable warning that Chad noticed.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@148164 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-13Implement proper ObjC ARC objc_retainBlock "escape" analysis, so thatDan Gohman
the optimizer doesn't eliminate objc_retainBlock calls which are needed for their side effect of copying blocks onto the heap. This implements rdar://10361249. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@148076 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-21Fix a copy+pasto. No testcase, because the symptoms of dereferencingDan Gohman
an invalid iterator aren't reproducible. rdar://10614085. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147098 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-14It turns out that clang does use pointer-to-function types toDan Gohman
point to ARC-managed pointers sometimes. This fixes rdar://10551239. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@146577 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-12When computing reverse-CFG reverse-post-order, skip backedges, asDan Gohman
detected in the forward-CFG DFS. This prevents the reverse-CFG from visiting blocks inside loops after blocks that dominate them in the case where loops have multiple exits. No testcase, because this fixes a bug which in practice only shows up in a full optimizer run, due to the use-list order. This fixes rdar://10422791 and others. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@146408 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-12Add a TODO comment.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@146389 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-12Fix a copy+pasto in a comment.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@146385 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-12Use getArgOperand instead of getOperand on a call.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@146384 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-12Inline SetSeqToRelease into its only caller, since it's more clear that way.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@146383 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-12Fix omitted break statements in a switch.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@146380 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-17Teach the ARC optimizer about the !clang.arc.copy_on_escape metadataDan Gohman
tag on objc_retainBlock calls, which indicates that they may be optimized away. rdar://10211286. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@142298 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-17Suppress partial retain+release elimination when there's aDan Gohman
possibility that it will span multiple CFG diamonds/triangles which could have different controlling predicates. rdar://10282956 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@142222 91177308-0d34-0410-b5e6-96231b3b80d8
2011-09-29When eliminating unnecessary retain+autorelease on return values,Dan Gohman
handle the case where the retain is in a different basic block. rdar://10210274. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140815 91177308-0d34-0410-b5e6-96231b3b80d8
2011-09-29Don't eliminate objc_retainBlock calls on stack objects if theDan Gohman
objc_retainBlock call is potentially responsible for copying the block to the heap to extend its lifetime. rdar://10209613. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140814 91177308-0d34-0410-b5e6-96231b3b80d8
2011-09-14Don't mark objc_retainBlock as nounwind. It calls user copy constructorsDan Gohman
which could theoretically throw. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139710 91177308-0d34-0410-b5e6-96231b3b80d8
2011-09-14objc_retainBlock is not NoModRef because it can update forwarding pointersDan Gohman
in memory relevant to the optimizer. rdar://10050579. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139708 91177308-0d34-0410-b5e6-96231b3b80d8
2011-09-12Change a bunch of isVolatile() checks to check for atomic load/store as well.Eli Friedman
No tests; these changes aren't really interesting in the sense that the logic is the same for volatile and atomic. I believe this completes all of the changes necessary for the optimizer to handle loads and stores correctly. I'm going to try and come up with some additional testing, though. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139533 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-25When inserting new instructions, use getFirstInsertionPt instead ofBill Wendling
getFirstNonPHI so that it will skip over the landingpad instructions as well. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138537 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-22Add a comment.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138243 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-22Constant pointers to objects don't need reference counting.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138242 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-19Track a retain+release nesting level independently of theDan Gohman
known-incremented level, because the two concepts can be used to prove the saftey of a retain+release removal in different ways. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138016 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-18Make it clear that this code is iterating in reverse order through the array.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137985 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-12Don't convert objc_autoreleaseReturnValue to objc_autorelease if the resultDan Gohman
is returned through a bitcast. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137402 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-12Don't let arbitrary calls disrupt nested retain+release pairs ifDan Gohman
the retains and releases all use the same SSA pointer value. Also, don't let CFG hazards disrupt nested retain+release pair optimizations. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137399 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-12Use an actual reverse-CFG reverse-postorder for the bottom-up traversal,Dan Gohman
rather than plain postorder, so that CFG constructs like single-exit loops are reliably visited in a sensible order. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137398 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-11Fix typos in comments, and delete an unused function.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137352 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-04Fix an obvious type. Patch by Ivan Krasin.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136900 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-22Move the last uses of RetainFunc etc. over to using getRetainCallee() etc.Dan Gohman
so that a declaration for objc_retain is created when needed if it doesn't already exist. rdar://9825114. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135821 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-18land David Blaikie's patch to de-constify Type, with a few tweaks.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135375 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-15Convert CallInst and InvokeInst APIs to use ArrayRef.Jay Foad
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135265 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-12Second attempt at de-constifying LLVM Types in FunctionType::get(),Jay Foad
StructType::get() and TargetData::getIntPtrType(). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134982 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-12Revert r134893 and r134888 (and related patches in other trees). It was causingBill Wendling
an assert on Darwin llvm-gcc builds. Assertion failed: (castIsValid(op, S, Ty) && "Invalid cast!"), function Create, file /Users/buildslave/zorg/buildbot/smooshlab/slave-0.8/build.llvm-gcc-i386-darwin9-RA/llvm.src/lib/VMCore/Instructions.cpp, li\ ne 2067. etc. http://smooshlab.apple.com:8013/builders/llvm-gcc-i386-darwin9-RA/builds/2354 --- Reverse-merging r134893 into '.': U include/llvm/Target/TargetData.h U include/llvm/DerivedTypes.h U tools/bugpoint/ExtractFunction.cpp U unittests/Support/TypeBuilderTest.cpp U lib/Target/ARM/ARMGlobalMerge.cpp U lib/Target/TargetData.cpp U lib/VMCore/Constants.cpp U lib/VMCore/Type.cpp U lib/VMCore/Core.cpp U lib/Transforms/Utils/CodeExtractor.cpp U lib/Transforms/Instrumentation/ProfilingUtils.cpp U lib/Transforms/IPO/DeadArgumentElimination.cpp U lib/CodeGen/SjLjEHPrepare.cpp --- Reverse-merging r134888 into '.': G include/llvm/DerivedTypes.h U include/llvm/Support/TypeBuilder.h U include/llvm/Intrinsics.h U unittests/Analysis/ScalarEvolutionTest.cpp U unittests/ExecutionEngine/JIT/JITTest.cpp U unittests/ExecutionEngine/JIT/JITMemoryManagerTest.cpp U unittests/VMCore/PassManagerTest.cpp G unittests/Support/TypeBuilderTest.cpp U lib/Target/MBlaze/MBlazeIntrinsicInfo.cpp U lib/Target/Blackfin/BlackfinIntrinsicInfo.cpp U lib/VMCore/IRBuilder.cpp G lib/VMCore/Type.cpp U lib/VMCore/Function.cpp G lib/VMCore/Core.cpp U lib/VMCore/Module.cpp U lib/AsmParser/LLParser.cpp U lib/Transforms/Utils/CloneFunction.cpp G lib/Transforms/Utils/CodeExtractor.cpp U lib/Transforms/Utils/InlineFunction.cpp U lib/Transforms/Instrumentation/GCOVProfiling.cpp U lib/Transforms/Scalar/ObjCARC.cpp U lib/Transforms/Scalar/SimplifyLibCalls.cpp U lib/Transforms/Scalar/MemCpyOptimizer.cpp G lib/Transforms/IPO/DeadArgumentElimination.cpp U lib/Transforms/IPO/ArgumentPromotion.cpp U lib/Transforms/InstCombine/InstCombineCompares.cpp U lib/Transforms/InstCombine/InstCombineAndOrXor.cpp U lib/Transforms/InstCombine/InstCombineCalls.cpp U lib/CodeGen/DwarfEHPrepare.cpp U lib/CodeGen/IntrinsicLowering.cpp U lib/Bitcode/Reader/BitcodeReader.cpp git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134949 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-11De-constify Types in FunctionType::get().Jay Foad
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134888 91177308-0d34-0410-b5e6-96231b3b80d8
2011-06-20Completely short-circuit out ARC optimization if the ARC runtimeDan Gohman
functions do not appear in the module. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133478 91177308-0d34-0410-b5e6-96231b3b80d8
2011-06-16Fix ARCOpt to insert releases on both successors of an invoke ratherDan Gohman
than trying to insert them immediately after the invoke. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133188 91177308-0d34-0410-b5e6-96231b3b80d8
2011-06-15The ARC language-specific optimizer. Credit to Dan Gohman.John McCall
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133108 91177308-0d34-0410-b5e6-96231b3b80d8
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