[flang] Refine EVENT_TYPE/LOCK_TYPE usage checks (#123244)

The event variable in an EVENT POST/WAIT statement can be a coarray
reference, and need not be an entire coarray.

Variables and potenti

[flang] Refine EVENT_TYPE/LOCK_TYPE usage checks (#123244)

The event variable in an EVENT POST/WAIT statement can be a coarray
reference, and need not be an entire coarray.

Variables and potential subobject components with EVENT_TYPE/LOCK_TYPE
must be coarrays, unless they are potential subobjects nested within
coarrays or pointers.

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[Flang] Switch to common::visit more call sites (#90018)

Switch to common::visit more call sites.

Test plan: ninja check-all

[flang] Add notify-type and notify-wait-stmt (#76594)

Add `notify-type` to `iso_fortran_env` module. Add `notify-wait-stmt` to
the parser and add checks for constraints on the statement, `C1177` an

[flang] Add notify-type and notify-wait-stmt (#76594)

Add `notify-type` to `iso_fortran_env` module. Add `notify-wait-stmt` to
the parser and add checks for constraints on the statement, `C1177` and
`C1178`, from the Fortran 2023 standard. Add three semantics tests for
`notify-wait-stmt`.

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[flang] Add optional portability warning for upcoming Fortran 202X/3 breaking change

The soon-to-be-published next revision of the ISO Fortran language standard
contains a couple of breaking changes

[flang] Add optional portability warning for upcoming Fortran 202X/3 breaking change

The soon-to-be-published next revision of the ISO Fortran language standard
contains a couple of breaking changes to previous specifications that may cause
existing programs to silently change their behavior.

For the change that introduces automatic reallocation of deferred length
allocatable character scalar variables when they appear as the targets
of internal WRITE statements, as IOMSG=/ERRMSG= variables, as outputs
of INQUIRE specifiers, or as INTENT(OUT) arguments to intrinsic
procedures, this patch adds an optional portability warning.

Differential Revision: https://reviews.llvm.org/D154242

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[flang] Apply the check for the constraint `C1172` to more stmts

Apply the check for the constraint `C1172` to `unlock-stmt`,
`change-team-stmt`, `end-team-stmt`, and `critical-stmt`, which
all have

[flang] Apply the check for the constraint `C1172` to more stmts

Apply the check for the constraint `C1172` to `unlock-stmt`,
`change-team-stmt`, `end-team-stmt`, and `critical-stmt`, which
all have `sync-stat-lists` and so `C1172` applies to them. Add
a test to check the `sync-stat-lists` for these 4 statements.

Reviewed By: PeteSteinfeld

Differential Revision: https://reviews.llvm.org/D150745

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[flang] Add check for constraints on event-stmts

In the CoarrayChecker, add checks for the constraints C1177 and
C1178 for event-wait-stmt. Add event-post-stmt to the check
for the constraints for s

[flang] Add check for constraints on event-stmts

In the CoarrayChecker, add checks for the constraints C1177 and
C1178 for event-wait-stmt. Add event-post-stmt to the check
for the constraints for sync-stat-list. Add a check for the
constraint C1176 on event-variable.

Reviewed By: PeteSteinfeld

Differential Revision: https://reviews.llvm.org/D137204

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Revert "[flang] Add check for constraints on event-stmts"

This reverts commit 9725c740fbe7841a7aed57ca35f83d28aac1814c.

[flang] Add check for constraints on event-stmts

In the CoarrayChecker, add checks for the constraints C1177 and
C1178 for event-wait-stmt. Add event-post-stmt to the check
for the constraints for s

[flang] Add check for constraints on event-stmts

In the CoarrayChecker, add checks for the constraints C1177 and
C1178 for event-wait-stmt. Add event-post-stmt to the check
for the constraints for sync-stat-list. Add a check for the
constraint C1176 on event-variable.

Reviewed By: PeteSteinfeld

Differential Revision: https://reviews.llvm.org/D137204

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[flang] Add check for constraints on synchronization-stmts

In the CoarrayChecker, add checks for the constraints C1172 and
C1173, which constrain sync-stat-list. Add these checks to
sync-all-stmt, s

[flang] Add check for constraints on synchronization-stmts

In the CoarrayChecker, add checks for the constraints C1172 and
C1173, which constrain sync-stat-list. Add these checks to
sync-all-stmt, sync-images-stmt, sync-memory-stmt, and
sync-team-stmt. Also add a check for the constraint C1174 in
sync-images-stmt. Update semantics tests for these stmts.

Reviewed By: klausler

Differential Revision: https://reviews.llvm.org/D136104

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[flang] Finer control over error recovery with GetExpr()

Prior to this patch, the semantics utility GetExpr() will crash
unconditionally if it encounters a typed expression in the parse
tree that ha

[flang] Finer control over error recovery with GetExpr()

Prior to this patch, the semantics utility GetExpr() will crash
unconditionally if it encounters a typed expression in the parse
tree that has not been set by expression semantics. This is the
right behavior when called from lowering, by which time it is known
that the program had no fatal user errors, since it signifies a
fatal internal error. However, prior to lowering, in the statement
semantics checking code, a more nuanced test should be used before
crashing -- specifically, we should not crash in the face of a
missing typed expression when in error recovery mode.

Getting this right requires GetExpr() and its helper class to have
access to the semantics context, so that it can check AnyFatalErrors()
before crashing. So this patch touches nearly all of its call sites.

Differential Revision: https://reviews.llvm.org/D123873

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[flang] Support for image selectors

Summary:
This change implements support for image selectors and image selector
specifications as described in section 9.6.

In check-coarray[.h,cpp] I changed the

[flang] Support for image selectors

Summary:
This change implements support for image selectors and image selector
specifications as described in section 9.6.

In check-coarray[.h,cpp] I changed the `Leave()` function for
`parser::ImageSelectorSpec` to take a `parser::ImageSelector`, which
contains a list of image selector specifications. This allows us to
detect when the same specification is used more than once. I also added
code to analyze the expressions for the image selector specifications to
expression.cpp and a test for all of the conditions to check at
compile-time.

Note that we do not check at compile-time to see if the value of the
cosubscripts are within the specified cobounds. We also do not check anything
related to selecting a valid team. We also do not check that the denotation of
the `stat-variable` is not dependent on the evaluation of an entity in the
same statement.

Reviewers: klausler, tskeith, DavidTruby

Subscribers: llvm-commits

Tags: #llvm, #flang

Differential Revision: https://reviews.llvm.org/D83336

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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] [LLVMify F18] Compiler module folders should have capitalised names (flang-compiler/f18#980)

This patch renames the modules in f18 to use a capital letter in the
module name

Signed-off-b

[flang] [LLVMify F18] Compiler module folders should have capitalised names (flang-compiler/f18#980)

This patch renames the modules in f18 to use a capital letter in the
module name

Signed-off-by: Caroline Concatto <caroline.concatto@arm.com>

Original-commit: flang-compiler/f18@d2eb7a1c443d1539ef12b6f027074a0eb15b1ea0
Reviewed-on: https://github.com/flang-compiler/f18/pull/980

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