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68aaa34960
This patch introduces a new mechanism that allows IR modules to co-operatively build pointer sets corresponding to addresses within a given set of globals. One particular use case for this is to allow a C++ program to efficiently verify (at each call site) that a vtable pointer is in the set of valid vtable pointers for the class or its derived classes. One way of doing this is for a toolchain component to build, for each class, a bit set that maps to the memory region allocated for the vtables, such that each 1 bit in the bit set maps to a valid vtable for that class, and lay out the vtables next to each other, to minimize the total size of the bit sets. The patch introduces a metadata format for representing pointer sets, an '@llvm.bitset.test' intrinsic and an LTO lowering pass that lays out the globals and builds the bitsets, and documents the new feature. Differential Revision: http://reviews.llvm.org/D7288 llvm-svn: 230054
31 lines
625 B
CMake
31 lines
625 B
CMake
add_llvm_library(LLVMipo
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ArgumentPromotion.cpp
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BarrierNoopPass.cpp
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ConstantMerge.cpp
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DeadArgumentElimination.cpp
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ExtractGV.cpp
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FunctionAttrs.cpp
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GlobalDCE.cpp
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GlobalOpt.cpp
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IPConstantPropagation.cpp
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IPO.cpp
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InlineAlways.cpp
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InlineSimple.cpp
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Inliner.cpp
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Internalize.cpp
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LoopExtractor.cpp
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LowerBitSets.cpp
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MergeFunctions.cpp
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PartialInlining.cpp
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PassManagerBuilder.cpp
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PruneEH.cpp
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StripDeadPrototypes.cpp
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StripSymbols.cpp
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ADDITIONAL_HEADER_DIRS
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${LLVM_MAIN_INCLUDE_DIR}/llvm/Transforms
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${LLVM_MAIN_INCLUDE_DIR}/llvm/Transforms/IPO
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)
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add_dependencies(LLVMipo intrinsics_gen)
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