[flang-commits] [PATCH] D134476: [flang] Allow "non-expandable" scalars in single-element contexts

[Peter Klausler via Phabricator via flang-commits]

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When a scalar expression is not expandable -- i.e., it would have to be
evaluated once and saved in a temporary to avoid changing the semantics
of the program if it were to be evaluated more than once -- it affects
some aspects of folding and expression semantics.  In cases where
scalar expansion would not cause multiple evaluations due to the shape
of the result having but a single element, however, these "non-expandable"
scalar expressions can be safely allowed.


https://reviews.llvm.org/D134476

Files:
  flang/include/flang/Evaluate/characteristics.h
  flang/include/flang/Evaluate/shape.h
  flang/include/flang/Evaluate/tools.h
  flang/lib/Evaluate/fold-implementation.h
  flang/lib/Evaluate/shape.cpp
  flang/lib/Semantics/expression.cpp

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