[all-commits] [llvm/llvm-project] fb4eca: [flang][OpenMP] Change clause modifier representat...

[Krzysztof Parzyszek via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: fb4ecada815ceee37536a26b4ff5ce231226b23e
      https://github.com/llvm/llvm-project/commit/fb4ecada815ceee37536a26b4ff5ce231226b23e
  Author: Krzysztof Parzyszek <Krzysztof.Parzyszek at amd.com>
  Date:   2024-11-20 (Wed, 20 Nov 2024)

  Changed paths:
    A flang/include/flang/Semantics/openmp-modifiers.h
    M flang/lib/Semantics/CMakeLists.txt
    A flang/lib/Semantics/openmp-modifiers.cpp
    M llvm/include/llvm/Frontend/OpenMP/OMP.h
    M llvm/lib/Frontend/OpenMP/OMP.cpp

  Log Message:
  -----------
  [flang][OpenMP] Change clause modifier representation in parser (#116656)

The main issue to solve is that OpenMP modifiers can be specified in any
order, so the parser cannot expect any specific modifier at a given
position. To solve that, define modifier to be a union of all allowable
specific modifiers for a given clause.

Additionally, implement modifier descriptors: for each modifier the
corresponding descriptor contains a set of properties of the modifier
that allow a common set of semantic checks. Start with the syntactic
properties defined in the spec: Required, Unique, Exclusive, Ultimate,
and implement common checks to verify each of them.

OpenMP modifier overhaul: #2/3



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