[PATCH] D106893: [flang] Disallow BOZ literal constants as output list items

[Pete Steinfeld via Phabricator via llvm-commits]

PeteSteinfeld created this revision.
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According to C7109, "A boz-literal-constant shall appear only as a
data-stmt-constant in a DATA statement, or where explicitly allowed in
16.9 as an actual argument of an intrinsic procedure."  This change
enforces that constraint for output list items.

I also added a general interface to determine if an expression is a BOZ
literal constant and changed all of the places I could find where it
could be used.

I also added a test.

This change stemmed from the following issue --

  https://gitlab-master.nvidia.com/fortran/f18-stage/issues/108


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D106893

Files:
  flang/include/flang/Evaluate/tools.h
  flang/lib/Evaluate/intrinsics.cpp
  flang/lib/Semantics/check-call.cpp
  flang/lib/Semantics/check-io.cpp
  flang/lib/Semantics/data-to-inits.cpp
  flang/lib/Semantics/expression.cpp
  flang/test/Semantics/boz-literal-constants.f90

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