[flang-commits] [PATCH] D94849: [flang] Refine WhyNotModifiable()

[Peter Klausler via Phabricator via flang-commits]

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The utility routine WhyNotModifiable() needed to become more
aware of the use of pointers in data-refs; the targets of
pointer components are sometimes modifiable even when the
leftmost ("base") symbol of a data-ref is not.

Added a new unit test for WhyNotModifiable() that uses internal
READ statements (mostly), since I/O semantic checking uses
WhyNotModifiable() for all its definability checking.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D94849

Files:
  flang/include/flang/Evaluate/tools.h
  flang/lib/Evaluate/tools.cpp
  flang/lib/Semantics/check-io.cpp
  flang/lib/Semantics/tools.cpp
  flang/test/Semantics/modifiable01.f90

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