[PATCH] D85363: [flang] Add options to control IMPLICIT NONE
Tim Keith via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Wed Aug 5 14:17:17 PDT 2020
tskeith created this revision.
tskeith added reviewers: klausler, PeteSteinfeld, sscalpone.
tskeith added a project: Flang.
Herald added a reviewer: jdoerfert.
Herald added a reviewer: DavidTruby.
Herald added a project: LLVM.
Herald added a subscriber: llvm-commits.
tskeith requested review of this revision.
Add `-fimplicit-none-type-always` to treat each specification-part
like it has `IMPLICIT NONE`. This is helpful for enforcing good Fortran
programming practices. We might consider something similar for
`IMPLICIT NONE(EXTERNAL)` as well.
Add `-fimplicit-none-type-never` to ignore occurrences of `IMPLICIT NONE`
and `IMPLICIT NONE(TYPE)`. This is to handle cases like the one below,
which violates the standard but it accepted by some compilers:
subroutine s(a, n)
implicit none
real :: a(n)
integer :: n
end
Repository:
rG LLVM Github Monorepo
https://reviews.llvm.org/D85363
Files:
flang/documentation/Extensions.md
flang/include/flang/Common/Fortran-features.h
flang/lib/Semantics/resolve-names.cpp
flang/test/Semantics/implicit09.f90
flang/test/Semantics/implicit10.f90
flang/tools/f18/f18.cpp
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