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Checking a couple of testing TODOs off and adding more tests of the outlining pass for outlining:
- a sequence at the beginning of an existing function
- a sequence that is outlined into a function that takes no arguments
- multiple sequences from the same source function into different outlined functions
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Adds an outlining pass that performs outlining on a module end to end, and two tests.
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Adds a function to filter branch and return instructions from being included in potential outlining candidates.
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Adds a general purpose walker named FilterStringifyWalker, intended to walk control flow and take note of whether any of the expressions satisfy the condition.
Also includes an << overload for SuffixTree::RepeatedSubstring to make debugging easier.
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Adds a std::variant to represent the context of why a unique symbol was inserted in the stringified module. This allows us to pass necessary contextual data to subclasses of StringifyWalker in a structured manner.
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This PR adds a StringProcessor struct intended to hold functions that filter vectors of SuffixTree::RepeatedSubstring, and a test of its first functionality, removing overlapping repeated substrings.
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The LLVM suffix tree expects to be provided with a vector of 32-bit unsigned integers. This PR makes it easier to integrate our wasm program string with the suffix tree.
Because the range of possible values is reduced from 2^64 to 2^32, a signed integer was added to manage the next separator value and ensure we're using every possible negative number.
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This PR is part of the effort to bring Outlining to Binaryen.
HashStringifyWalker is a subclass of StringifyWalker #5772, and used to encode a wasm module as a "string". Our "string" is a vector and each symbol is a uint64_t, providing us with a capacity of 2^64 symbols.
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