[all-commits] [llvm/llvm-project] f31ac3: [flang] Handle implied ASYNCHRONOUS attribute (#82...

[Peter Klausler via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: f31ac3cb1ff7958fadf6e3e431790f2d668583b4
      https://github.com/llvm/llvm-project/commit/f31ac3cb1ff7958fadf6e3e431790f2d668583b4
  Author: Peter Klausler <35819229+klausler at users.noreply.github.com>
  Date:   2024-03-01 (Fri, 01 Mar 2024)

  Changed paths:
    M flang/docs/Extensions.md
    M flang/include/flang/Parser/parse-tree.h
    M flang/lib/Evaluate/characteristics.cpp
    M flang/lib/Semantics/check-call.cpp
    M flang/lib/Semantics/resolve-names.cpp
    M flang/test/Semantics/call03.f90

  Log Message:
  -----------
  [flang] Handle implied ASYNCHRONOUS attribute (#82638)

The standard states that data objects involved in an asynchronous data
transfer statement gain the ASYNCHRONOUS attribute implicitly in the
surrounding subprogram or BLOCK scope. This attribute affects the checks
in call semantics, as an ASYNCHRONOUS actual object associated with an
ASYNCHRONOUS dummy argument must not require data copies in or out.

(Most compilers don't implement implied ASYNCHRONOUS attributes
correctly; XLF gets these right, and GNU is close.)



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