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54e8749794
This pass implements whole program optimization of virtual calls in cases where we know (via bitset information) that the list of callees is fixed. This includes the following: - Single implementation devirtualization: if a virtual call has a single possible callee, replace all calls with a direct call to that callee. - Virtual constant propagation: if the virtual function's return type is an integer <=64 bits and all possible callees are readnone, for each class and each list of constant arguments: evaluate the function, store the return value alongside the virtual table, and rewrite each virtual call as a load from the virtual table. - Uniform return value optimization: if the conditions for virtual constant propagation hold and each function returns the same constant value, replace each virtual call with that constant. - Unique return value optimization for i1 return values: if the conditions for virtual constant propagation hold and a single vtable's function returns 0, or a single vtable's function returns 1, replace each virtual call with a comparison of the vptr against that vtable's address. Differential Revision: http://reviews.llvm.org/D16795 llvm-svn: 260312
38 lines
781 B
CMake
38 lines
781 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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CrossDSOCFI.cpp
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DeadArgumentElimination.cpp
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ElimAvailExtern.cpp
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ExtractGV.cpp
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ForceFunctionAttrs.cpp
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FunctionAttrs.cpp
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FunctionImport.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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InferFunctionAttrs.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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SampleProfile.cpp
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StripDeadPrototypes.cpp
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StripSymbols.cpp
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WholeProgramDevirt.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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