[all-commits] [llvm/llvm-project] 6b8800: [clang][dataflow] Enable comparison of distinct va...

[Stanislav Gatev via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 6b8800dfb5c9486c7302cc2d8d2ae362ef8fdfbd
      https://github.com/llvm/llvm-project/commit/6b8800dfb5c9486c7302cc2d8d2ae362ef8fdfbd
  Author: Stanislav Gatev <sgatev at google.com>
  Date:   2022-02-01 (Tue, 01 Feb 2022)

  Changed paths:
    M clang/include/clang/Analysis/FlowSensitive/DataflowAnalysis.h
    M clang/include/clang/Analysis/FlowSensitive/DataflowEnvironment.h
    M clang/include/clang/Analysis/FlowSensitive/TypeErasedDataflowAnalysis.h
    M clang/lib/Analysis/FlowSensitive/DataflowEnvironment.cpp
    M clang/lib/Analysis/FlowSensitive/TypeErasedDataflowAnalysis.cpp
    M clang/unittests/Analysis/FlowSensitive/TestingSupport.h
    M clang/unittests/Analysis/FlowSensitive/TypeErasedDataflowAnalysisTest.cpp

  Log Message:
  -----------
  [clang][dataflow] Enable comparison of distinct values in Environment

Make specializations of `DataflowAnalysis` extendable with domain-specific
logic for comparing distinct values when comparing environments.

This includes a breaking change to the `runDataflowAnalysis` interface
as the return type is now `llvm::Expected<...>`.

This is part of the implementation of the dataflow analysis framework.
See "[RFC] A dataflow analysis framework for Clang AST" on cfe-dev.

Reviewed-by: ymandel, xazax.hun

Differential Revision: https://reviews.llvm.org/D118596