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.
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`.
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
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
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
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
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
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
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
