[flang] LBOUND() edge case: empty dimension

LBOUND must return 1 for an empty dimension, no matter what
explicit expression might appear in a declaration or arrive in
a descriptor.

Differential Rev

[flang] LBOUND() edge case: empty dimension

LBOUND must return 1 for an empty dimension, no matter what
explicit expression might appear in a declaration or arrive in
a descriptor.

Differential Revision: https://reviews.llvm.org/D121488

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[flang] "CFI" types for Fortran REAL and COMPLEX kinds 2, 3, 10, 16

Add additional "CFI" types for Fortran REAL and COMPLEX kinds 2, 3, 10, 16 to allow their use in Fortran descriptors.

[flang] Move runtime API headers to flang/include/flang/Runtime

Move the closure of the subset of flang/runtime/*.h header files that
are referenced by source files outside flang/runtime (apart from

[flang] Move runtime API headers to flang/include/flang/Runtime

Move the closure of the subset of flang/runtime/*.h header files that
are referenced by source files outside flang/runtime (apart from unit tests)
into a new directory (flang/include/flang/Runtime) so that relative
include paths into ../runtime need not be used.

flang/runtime/pgmath.h.inc is moved to flang/include/flang/Evaluate;
it's not used by the runtime.

Differential Revision: https://reviews.llvm.org/D109107

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[flang] Add clang-tidy check for braces around if

Flang diverges from the llvm coding style in that it requires braces
around the bodies of if/while/etc statements, even when the body is
a single st

[flang] Add clang-tidy check for braces around if

Flang diverges from the llvm coding style in that it requires braces
around the bodies of if/while/etc statements, even when the body is
a single statement.

This commit adds the readability-braces-around-statements check to
flang's clang-tidy config file. Hopefully the premerge bots will pick it
up and report violations in Phabricator.

We also explicitly disable the check in the directories corresponding to
the Lower and Optimizer libraries, which rely heavily on mlir and llvm
and therefore follow their coding style. Likewise for the tools
directory.

We also fix any outstanding violations in the runtime and in
lib/Semantics.

Differential Revision: https://reviews.llvm.org/D104100

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[flang] Fix handling of elem_len in CFI_establish

The current code computes the minimum element length based on the `type`
used to create the descriptor and uses that as the element length
whenever

[flang] Fix handling of elem_len in CFI_establish

The current code computes the minimum element length based on the `type`
used to create the descriptor and uses that as the element length
whenever it is greater than 0. This means that the `elem_len` parameter
is essentially ignored for any type where we can compute a minimum
element length (which includes `CFI_type_char[16|32]_t`), and we may
therefore end up with descriptors with a lower element length than
expected.

This patch fixes the issue by explicitly doing what the standard says,
i.e. it uses the given `elem_len` for character types, `CFI_type_struct`
and `CFI_type_other`, and ignores it (falls back to the minimum element
length) for everything else.

Differential Revision: https://reviews.llvm.org/D101659

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[flang] Use CFI_TYPE_LAST instead of CFI_type_struct

It looks like CFI_type_struct was once used as the last valid CFI_type
value, but in the meantime CFI_type_char16_t and CFI_type_char32_t were
ad

[flang] Use CFI_TYPE_LAST instead of CFI_type_struct

It looks like CFI_type_struct was once used as the last valid CFI_type
value, but in the meantime CFI_type_char16_t and CFI_type_char32_t were
added, making that assumption no longer true. Luckily, in the meantime
we also got a define for CFI_TYPE_LAST, which we can now use to allow
CFI_establish and CFI_allocate to work with descriptors of
CFI_type_char16_t, CFI_type_char32_t and any other future types.

Differential Revision: https://reviews.llvm.org/D101658

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[flang] Implement runtime support for basic ALLOCATE/DEALLOCATE

Add error reporting infrastructure and support for ALLOCATE
and DEALLOCATE statements of intrinsic types without SOURCE=
or MOLD=.

Di

[flang] Implement runtime support for basic ALLOCATE/DEALLOCATE

Add error reporting infrastructure and support for ALLOCATE
and DEALLOCATE statements of intrinsic types without SOURCE=
or MOLD=.

Differential revision: https://reviews.llvm.org/D91215

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[flang] More Fortran runtime support for CHARACTER operations

Summary:
- Remove C++ library dependence from lock.h
- Implement LEN_TRIM, REPEAT, ADJUSTL, ADJUSTR, MAX/MIN
intrinsic functions for C

[flang] More Fortran runtime support for CHARACTER operations

Summary:
- Remove C++ library dependence from lock.h
- Implement LEN_TRIM, REPEAT, ADJUSTL, ADJUSTR, MAX/MIN
intrinsic functions for CHARACTER

Reviewers: tskeith, PeteSteinfeld, sscalpone, schweitz, DavidTruby

Reviewed By: PeteSteinfeld

Subscribers: llvm-commits, flang-commits

Tags: #flang, #llvm

Differential Revision: https://reviews.llvm.org/D82054

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[flang] Reformat with latest clang-format and .clang-format

Original-commit: flang-compiler/f18@9fe84f45d7fd685051004678d6b5775dcc4c6f8f
Reviewed-on: https://github.com/flang-compiler/f18/pull/1094

[flang] Use hash table for UnitMap, avoid C++ STL binary dependence

Scan FORMAT strings locally to avoid C++ binary runtime dependence when computing deepest parenthesis nesting

Remove a dependency

[flang] Use hash table for UnitMap, avoid C++ STL binary dependence

Scan FORMAT strings locally to avoid C++ binary runtime dependence when computing deepest parenthesis nesting

Remove a dependency on ostream from runtime

Remove remaining direct external references from runtime to C++ library binaries

Remove runtime dependences on lib/common

SetPos() and SetRec()

Instantiate templates for input

Begin input; rearrange locking, deal with CLOSE races

View()

Update error message in test to agree with compiler change

First cut at real input

More robust I/O runtime error handling

Debugging of REAL input

Add iostat.{h,cpp}

Rename runtime/numeric-* to runtime/edit-*

Move templates around, templatize integer output editing

Move LOGICAL and CHARACTER output from io-api.cpp to edit-output.cpp

Change pointer argument to reference

More list-directed input

Complex list-directed input

Use enum class Direction rather than bool for templates

Catch up with changes to master

Undo reformatting of Lower code

Use record number instead of subscripts for internal unit

Unformatted sequential backspace

Testing and debugging

Dodge bogus GCC warning

Add <cstddef> for std::size_t to fix CI build

Address review comments

Original-commit: flang-compiler/f18@50406b349609efdde76e48bf2caa039d031dd1c4
Reviewed-on: https://github.com/flang-compiler/f18/pull/1053

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[flang] Changed *.cc file extension to *.cpp (updated scripts) (flang-compiler/f18#958)

Updated CMake files accordingly, using better regex
Updated license headers to match new extension and fit wi

[flang] Changed *.cc file extension to *.cpp (updated scripts) (flang-compiler/f18#958)

Updated CMake files accordingly, using better regex
Updated license headers to match new extension and fit within 80 columns
Updated other comments within files that referred to the old extension

Original-commit: flang-compiler/f18@ae7721e611918631d1e3821dbb60f5ffcd9a69b1
Reviewed-on: https://github.com/flang-compiler/f18/pull/958

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