[Support] Store dominator tree nodes in a vector (#101705) Use basic block numbers to store dominator tree nodes in a vector. This avoids frequent map lookups. Use block number epochs to validate that no renumbering occured since the tree was created; after a renumbering, the dominator tree can be updated with updateBlockNumbers(). Block numbers, block number epoch, and max block number are fetched via newly added GraphTraits methods. Graphs which do not implement getNumber() for blocks will use a DenseMap for an ad-hoc numbering.
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This repository contains the source code for LLVM, a toolkit for the construction of highly optimized compilers, optimizers, and run-time environments.
The LLVM project has multiple components. The core of the project is itself called “LLVM”. This contains all of the tools, libraries, and header files needed to process intermediate representations and convert them into object files. Tools include an assembler, disassembler, bitcode analyzer, and bitcode optimizer.
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