platform/upstream/llvm.git
4 years ago[flang] Merge pull request flang-compiler/f18#637 from flang-compiler/ps-do-tests
psteinfeld [Sat, 10 Aug 2019 15:18:51 +0000 (08:18 -0700)]
[flang] Merge pull request flang-compiler/f18#637 from flang-compiler/ps-do-tests

Tests for DO loop semantics

Original-commit: flang-compiler/f18@960d76131e46ccb2ff704ab2bdbc070dff8cd279
Reviewed-on: https://github.com/flang-compiler/f18/pull/637

4 years ago[flang] - ieee_exceptions.f90: I added all of the routines listed in table 17.3...
Peter Steinfeld [Fri, 9 Aug 2019 18:34:31 +0000 (11:34 -0700)]
[flang]  - ieee_exceptions.f90: I added all of the routines listed in table 17.3 of the standard that were not currently specified.  I also re-ordered the routines to be in the same order as the standard.
 - doconcurrent01.f90: I removed the custom versions of ieee_exceptions and
 iso_fortran_env.  I also fixed a typo in a comment.  Also, the use of the real
 standare interface caused one of the error messages to go away, so I fixed
 that.

Original-commit: flang-compiler/f18@a8b310a9685d7e6502073ecb011c16aaa1e1d14b
Reviewed-on: https://github.com/flang-compiler/f18/pull/637

4 years ago[flang] Tests for DO loop semantics
Peter Steinfeld [Thu, 8 Aug 2019 20:28:50 +0000 (13:28 -0700)]
[flang] Tests for DO loop semantics
These are tests for checks that are already implemented, but for which we
did not have tests.

Original-commit: flang-compiler/f18@68f5acf7b1202162150162e1974fe43341a33eed
Reviewed-on: https://github.com/flang-compiler/f18/pull/637
Tree-same-pre-rewrite: false

4 years ago[flang] [OpenMP] parse tree changes for `OpenMPBlockConstruct` (flang-compiler/f18...
Jinxin (Brian) Yang [Fri, 9 Aug 2019 22:11:20 +0000 (15:11 -0700)]
[flang] [OpenMP] parse tree changes for `OpenMPBlockConstruct` (flang-compiler/f18#632)

* [OpenMP] parse tree changes for `OpenMPBlockConstruct`

1. merge `Workshare` and `Single` into `OpenMPBlockConstruct` because
   they both accept structured-block and syntax is similar to other block
   directives.

2. `OpenMPBlockConstruct` changes to structure like `{Begin, Block, End}`,
   where `Begin` and `End` are tuple of `{Directive, ClauseList}`.

3. Updated the check-omp-structure.* for necessary parts. Added all the END
   directive enumeration types that may have clauses.

More tests will be added during Semantics.

* [OpenMP] Update on Tim's suggestion

1. Fix unspecified enumeration for `OmpDirective` in the `OmpContext`.
   This is through getting rid of `PushContext(source)` function to
   make sure whenever it is about to push a NEW context, directive
   source location and enumeration are available. To do that, I moved
   around all the switches for directive into high level `Construct`'s
   `Enter` node. Besides fixing the issue, the side benefit is that
   whenever we call `GetContext().directive`, we are sure that the
   `directive` here was set already.

2. When `Enter` the `OmpEndBlockDirective` node, partial context
   information, such as directive source location or legal clause lists,
   needs to be reset. The new directive source location should be
   `OmpEndBlockDirective`'s `source`. The enumeration `directive`
   should not be reset for the END directives that do not accept
   clauses because nothing needs to be checked (for example any clause
   that is on `END PARALLEL` is illegal).

Original-commit: flang-compiler/f18@e5bd6b7ba0fbe9006f3e431260428b194f2d2616
Reviewed-on: https://github.com/flang-compiler/f18/pull/632

4 years ago[flang] Merge pull request flang-compiler/f18#638 from flang-compiler/pmk-forward
Peter Klausler [Fri, 9 Aug 2019 19:15:27 +0000 (12:15 -0700)]
[flang] Merge pull request flang-compiler/f18#638 from flang-compiler/pmk-forward

Handle forward references to procedures and interfaces

Original-commit: flang-compiler/f18@c2ce89030b0f2cc4da77d2da7b27bd5b75b9a572
Reviewed-on: https://github.com/flang-compiler/f18/pull/638

4 years ago[flang] address comments
peter klausler [Fri, 9 Aug 2019 16:38:21 +0000 (09:38 -0700)]
[flang] address comments

Original-commit: flang-compiler/f18@2bf995562cd86f61be7013e50e38c1aa5edc39eb
Reviewed-on: https://github.com/flang-compiler/f18/pull/638

4 years ago[flang] Add test for forward references in pointer initializers
peter klausler [Thu, 8 Aug 2019 22:15:01 +0000 (15:15 -0700)]
[flang] Add test for forward references in pointer initializers

Original-commit: flang-compiler/f18@9e01c102a1e14721bc10149f9902d41edfc96b77
Reviewed-on: https://github.com/flang-compiler/f18/pull/638
Tree-same-pre-rewrite: false

4 years ago[flang] More fixes; tests now all pass (with updates to some)
peter klausler [Thu, 8 Aug 2019 22:06:51 +0000 (15:06 -0700)]
[flang] More fixes; tests now all pass (with updates to some)

Original-commit: flang-compiler/f18@236ff3a3db90bec3c7f859f18ce31bd38491347f
Reviewed-on: https://github.com/flang-compiler/f18/pull/638
Tree-same-pre-rewrite: false

4 years ago[flang] rebase
peter klausler [Thu, 8 Aug 2019 17:50:23 +0000 (10:50 -0700)]
[flang] rebase

Original-commit: flang-compiler/f18@a2086f040602473917846b027b923fcd141bd193
Reviewed-on: https://github.com/flang-compiler/f18/pull/638
Tree-same-pre-rewrite: false

4 years ago[flang] prep for review
peter klausler [Thu, 8 Aug 2019 17:13:33 +0000 (10:13 -0700)]
[flang] prep for review

Original-commit: flang-compiler/f18@41f11f4fa0ddd91ffff003451e29bf6fff8c83b1
Reviewed-on: https://github.com/flang-compiler/f18/pull/638
Tree-same-pre-rewrite: false

4 years ago[flang] Proper PDT handling
peter klausler [Thu, 8 Aug 2019 00:10:43 +0000 (17:10 -0700)]
[flang] Proper PDT handling

Original-commit: flang-compiler/f18@32256daa15d663cd6b24bccd15727cd1e4ddefe6
Reviewed-on: https://github.com/flang-compiler/f18/pull/638
Tree-same-pre-rewrite: false

4 years ago[flang] Restore symbol to ProcBindingDetails
peter klausler [Wed, 7 Aug 2019 21:45:44 +0000 (14:45 -0700)]
[flang] Restore symbol to ProcBindingDetails

Original-commit: flang-compiler/f18@5dc1c91156d58ebd4f2e1ab720b01236976eb0a9
Reviewed-on: https://github.com/flang-compiler/f18/pull/638
Tree-same-pre-rewrite: false

4 years ago[flang] Save proc pointer inits in symbol table; add IsSaved() predicate to tools
peter klausler [Tue, 6 Aug 2019 18:49:47 +0000 (11:49 -0700)]
[flang] Save proc pointer inits in symbol table; add IsSaved() predicate to tools

Original-commit: flang-compiler/f18@23c6be91681b04cad4981281301e450a16ae5b62
Reviewed-on: https://github.com/flang-compiler/f18/pull/638
Tree-same-pre-rewrite: false

4 years ago[flang] Checkpoint work
peter klausler [Tue, 6 Aug 2019 17:22:10 +0000 (10:22 -0700)]
[flang] Checkpoint work

Original-commit: flang-compiler/f18@b8f614c3c41815410acfc93989885d6eaea46bd8
Reviewed-on: https://github.com/flang-compiler/f18/pull/638
Tree-same-pre-rewrite: false

4 years ago[flang] Deferred processing of pointer initializers (incomplete)
peter klausler [Mon, 5 Aug 2019 23:11:59 +0000 (16:11 -0700)]
[flang] Deferred processing of pointer initializers (incomplete)

Original-commit: flang-compiler/f18@2913b01c51ec3f1b3739c109aca9c41970b28d6c
Reviewed-on: https://github.com/flang-compiler/f18/pull/638
Tree-same-pre-rewrite: false

4 years ago[flang] [OpenMP] parse tree changes for ATOMIC constructs (flang-compiler/f18#636)
Jinxin (Brian) Yang [Fri, 9 Aug 2019 16:39:55 +0000 (09:39 -0700)]
[flang] [OpenMP] parse tree changes for ATOMIC constructs (flang-compiler/f18#636)

1. make the parse tree nodes more conform with OpenMP spec

2. isolate the memory related clauses to make the parse tree nodes
   extendable for OpenMP 5.0

3. source provenance is saved for each atomic-clause (read, write, update,
   and capture); for atomic-clause that is not present, source location
   is saved for "ATOMIC" directive name itself

More tests will be added during Semantics.

Original-commit: flang-compiler/f18@8e2db2f868f9dce705aa0a504e1c9ac1af8fe08f
Reviewed-on: https://github.com/flang-compiler/f18/pull/636

4 years ago[flang] Merge pull request flang-compiler/f18#640 from flang-compiler/tsk-issue587
Tim Keith [Fri, 9 Aug 2019 13:48:16 +0000 (06:48 -0700)]
[flang] Merge pull request flang-compiler/f18#640 from flang-compiler/tsk-issue587

Fix bug with generic and specific having same name

Original-commit: flang-compiler/f18@e8c8c0357bc428838b937912747e84b596ca4f9c
Reviewed-on: https://github.com/flang-compiler/f18/pull/640

4 years ago[flang] Fix bug with generic and specific having same name
Tim Keith [Thu, 8 Aug 2019 23:52:36 +0000 (16:52 -0700)]
[flang] Fix bug with generic and specific having same name

If a generic interface had a specific procedure with the same name that
is specified by an interface body, it was not handled correctly.

We were replacing the generic symbol with the symbol for the specific
procedure. Instead, leave the generic symbol in the scope and just
insert the new symbol for the specific into the generic.

Also, don't do distinguishability checks when one of the specific
procedures already has an error.

Fixes flang-compiler/f18#587.

Original-commit: flang-compiler/f18@2e905656758d7214635fb96a612760405b368b09
Reviewed-on: https://github.com/flang-compiler/f18/pull/640

4 years ago[flang] Merge pull request flang-compiler/f18#639 from flang-compiler/tsk-shared
Tim Keith [Fri, 9 Aug 2019 00:10:16 +0000 (17:10 -0700)]
[flang] Merge pull request flang-compiler/f18#639 from flang-compiler/tsk-shared

Fix problems building with shared libraries on Linux

Original-commit: flang-compiler/f18@0e3ed603c8d6ca611e5ae71cf52da72d351e81fc
Reviewed-on: https://github.com/flang-compiler/f18/pull/639

4 years ago[flang] Fix problems building with shared libraries on Linux
Tim Keith [Thu, 8 Aug 2019 23:23:53 +0000 (16:23 -0700)]
[flang] Fix problems building with shared libraries on Linux

Building with gcc 8 or 9 with shared libraries had linking
problems in test/evaluate. Fix those by adding FortranSemantics
to the library dependencies.

Original-commit: flang-compiler/f18@009b9ab171b4a9d9a3b7ca79f1d0c0b5d0ee7a8c
Reviewed-on: https://github.com/flang-compiler/f18/pull/639

4 years ago[flang] Merge pull request flang-compiler/f18#631 from flang-compiler/jpr-fix-589
jeanPerier [Thu, 8 Aug 2019 12:48:20 +0000 (05:48 -0700)]
[flang] Merge pull request flang-compiler/f18#631 from flang-compiler/jpr-fix-589

Prevent result symbol to be converted into function when they are called

Original-commit: flang-compiler/f18@464310a1e3b8cc222b0069c213de01c4c4561eaf
Reviewed-on: https://github.com/flang-compiler/f18/pull/631

4 years ago[flang] Fix reabsing conflict issue
Jean Perier [Thu, 8 Aug 2019 12:30:21 +0000 (05:30 -0700)]
[flang] Fix reabsing conflict issue
Remove duplicate `IsFunctionResultWithSameNameAsFunction` declarartion.

Original-commit: flang-compiler/f18@d88597ca7213ed63660a6633a0c88021b9d35949
Reviewed-on: https://github.com/flang-compiler/f18/pull/631

4 years ago[flang] Answer PR 631 comments:
Jean Perier [Thu, 8 Aug 2019 10:46:14 +0000 (03:46 -0700)]
[flang] Answer PR 631 comments:
 - Create a function `IsFunctionResult(const Symbol &)` in
   lib/semantics/tools.h.
 - style edit in weird var definition style.

Original-commit: flang-compiler/f18@15e3f87b40345765ac500e5f8c1412c31d4e2658
Reviewed-on: https://github.com/flang-compiler/f18/pull/631
Tree-same-pre-rewrite: false

4 years ago[flang] Prevent result symbol to be converted into function when they are called.
Jean Perier [Wed, 7 Aug 2019 10:51:13 +0000 (03:51 -0700)]
[flang] Prevent result symbol to be converted into function when they are called.
+ Fix issue 589.
+ Catch empty subscript list in array reference
In name resolution, when skimming through the execution statement of a
function, calls to the result symbol should not trigger the conversion
of this symbol to a function symbol. The result is a data object and
cannot be called unless it was explictly declared to be a procedure
pointer.
Notably, recursive function calls cannot be made if RESULT was not used.

The symbol is prevented from being transformed into a function
symbol by transforming it into an object before skimming through the
executable statement. This is done after processing all the
specifications so that if the result actually is a procedure pointer,
the call to `ConvertToObjectEntity` introduced by this commit will
not convert it to an object by mistake.

This commit also introduce a check when fixing misparsed function
reference into array reference to verify the array reference has
array subscripts. Currently this went uncaught. It is not possible
to complain later in expressions because the subscript list of
expression might be empty for unrelated error recovery reasons
(e.g. if an entity of the wrong type appeared as susbcript).

Add related tests.

Original-commit: flang-compiler/f18@2fd8b65f58aadc567dd23d64e4654304a42f6176
Reviewed-on: https://github.com/flang-compiler/f18/pull/631
Tree-same-pre-rewrite: false

4 years ago[flang] Merge pull request flang-compiler/f18#607 from flang-compiler/jpr-fix-594
jeanPerier [Thu, 8 Aug 2019 08:55:50 +0000 (01:55 -0700)]
[flang] Merge pull request flang-compiler/f18#607 from flang-compiler/jpr-fix-594

Fix issue 594 and add a derived type component visitor framework

Original-commit: flang-compiler/f18@009db27bfaca2a84b0795c0d977c68cd8b57ce88
Reviewed-on: https://github.com/flang-compiler/f18/pull/607

4 years ago[flang] copyright update
Jean Perier [Wed, 31 Jul 2019 17:30:42 +0000 (10:30 -0700)]
[flang] copyright update

Original-commit: flang-compiler/f18@e724438925f1cd5c28fe1fcf7ba93b1b9773f9e1
Reviewed-on: https://github.com/flang-compiler/f18/pull/607

4 years ago[flang] use newly added DEREF in component iterator
Jean Perier [Wed, 31 Jul 2019 15:56:25 +0000 (08:56 -0700)]
[flang] use newly added DEREF in component iterator

Original-commit: flang-compiler/f18@2185f2000967b7d4b51bf2eba663ba3dcea43a4b
Reviewed-on: https://github.com/flang-compiler/f18/pull/607
Tree-same-pre-rewrite: false

4 years ago[flang] Checkpoint: derived type component iterators
Jean Perier [Wed, 31 Jul 2019 14:19:22 +0000 (07:19 -0700)]
[flang] Checkpoint: derived type component iterators

Original-commit: flang-compiler/f18@72d209bb52d28aedc8335c8175a5ffb5bce161fc
Reviewed-on: https://github.com/flang-compiler/f18/pull/607
Tree-same-pre-rewrite: false

4 years ago[flang] Improve error messages about component types in allocate checks
Jean Perier [Fri, 26 Jul 2019 15:11:59 +0000 (08:11 -0700)]
[flang] Improve error messages about component types in allocate checks
Use component visitor framework to attach more information reagrding
where is the ultimate/potential component that is forbidden.
Also remove unused functions.

Original-commit: flang-compiler/f18@4619c5860a43b86f149698c495769bdff2d63557
Reviewed-on: https://github.com/flang-compiler/f18/pull/607
Tree-same-pre-rewrite: false

4 years ago[flang] Do not die on typeless source expression in allocate.
Jean Perier [Fri, 26 Jul 2019 13:39:26 +0000 (06:39 -0700)]
[flang] Do not die on typeless source expression in allocate.
While fixing 594, it appears the CHECK in allocate for non null
expression type pointer was too harsh as it could be a user error.
e.g: a boz used as source.

Original-commit: flang-compiler/f18@cbacdeaa0eb8077810db85d5b4469f797d524900
Reviewed-on: https://github.com/flang-compiler/f18/pull/607
Tree-same-pre-rewrite: false

4 years ago[flang] Add a derived type component visitor framework
Jean Perier [Fri, 26 Jul 2019 13:33:48 +0000 (06:33 -0700)]
[flang] Add a derived type component visitor framework
After fixing 594, it appears there were issues in
FindUltimateComponent that was considering type bound
procedure as components.
This commit fixes and beef-up the component visitation by making a visitor
class for it. The main advantage of making it an class vs functions is that
it is possible to get the component chain to the result component for better
feedback for the user.
The framework allow a single place to define/handle what ultimate, direct and
potential components are.

Original-commit: flang-compiler/f18@d84821a1d63f35904a004007f3645d689d8c3a4f
Reviewed-on: https://github.com/flang-compiler/f18/pull/607
Tree-same-pre-rewrite: false

4 years ago[flang] Fix issue 594
Jean Perier [Fri, 26 Jul 2019 13:31:44 +0000 (06:31 -0700)]
[flang] Fix issue 594
Add ProcBindingDetails to handling GetType.
Also add HostAssocDetails to be consitent with UseDetails handling
in this GetType.

Original-commit: flang-compiler/f18@b498aab15fa3561818474965ea957a49ba1ae544
Reviewed-on: https://github.com/flang-compiler/f18/pull/607
Tree-same-pre-rewrite: false

4 years ago[flang] Merge pull request flang-compiler/f18#584 from CarolineConcatto/block_constru...
Steve Scalpone [Wed, 7 Aug 2019 18:52:11 +0000 (11:52 -0700)]
[flang] Merge pull request flang-compiler/f18#584 from CarolineConcatto/block_construct_patch

Adding semantic checks for Block Construct

Original-commit: flang-compiler/f18@47781549a3b042bd609f6cb5b1d8cdbd7983037d
Reviewed-on: https://github.com/flang-compiler/f18/pull/584

4 years ago[flang] Removing TODO comments as they are implemented by this patch
Caroline Concatto [Wed, 7 Aug 2019 07:47:04 +0000 (08:47 +0100)]
[flang] Removing TODO comments as they are implemented by this patch

Original-commit: flang-compiler/f18@885eb92b4f8ce07fc39af3655f6c04b74a10a9fa
Reviewed-on: https://github.com/flang-compiler/f18/pull/584

4 years ago[flang] Removing two sentence error
Caroline Concatto [Tue, 6 Aug 2019 08:26:40 +0000 (09:26 +0100)]
[flang] Removing two sentence error

Original-commit: flang-compiler/f18@fd5aafc5af14e41cfbae9454394d4eb6b39e2e91
Reviewed-on: https://github.com/flang-compiler/f18/pull/584
Tree-same-pre-rewrite: false

4 years ago[flang] Changes in SaveStmt message for Common Block name specifier
Caroline Concatto [Tue, 23 Jul 2019 09:29:53 +0000 (10:29 +0100)]
[flang] Changes in SaveStmt  message for Common Block name specifier

Original-commit: flang-compiler/f18@2e63705f5c0e5bab5262495b0164ab90dc19ad47
Reviewed-on: https://github.com/flang-compiler/f18/pull/584
Tree-same-pre-rewrite: false

4 years ago[flang] Changes requested by the comunity
Caroline Concatto [Mon, 22 Jul 2019 14:35:51 +0000 (15:35 +0100)]
[flang] Changes requested by the comunity

Original-commit: flang-compiler/f18@309dd0fdfe4195d4624f9b1e55d3f5fe57e1ac9e
Reviewed-on: https://github.com/flang-compiler/f18/pull/584
Tree-same-pre-rewrite: false

5 years ago[flang] Adding semantic checks for Block Construct
Caroline Concatto [Wed, 17 Jul 2019 10:24:42 +0000 (11:24 +0100)]
[flang] Adding semantic checks for Block Construct

Original-commit: flang-compiler/f18@e626f431d46144b0003ccb3d0c9fe80c29cfa499
Reviewed-on: https://github.com/flang-compiler/f18/pull/584
Tree-same-pre-rewrite: false

4 years ago[flang] Merge pull request flang-compiler/f18#630 from flang-compiler/tsk-array-spec
Tim Keith [Wed, 7 Aug 2019 18:18:50 +0000 (11:18 -0700)]
[flang] Merge pull request flang-compiler/f18#630 from flang-compiler/tsk-array-spec

Perform more checks on array-specs

Original-commit: flang-compiler/f18@14a38209a9b08a65e919848207eb45421a168ef2
Reviewed-on: https://github.com/flang-compiler/f18/pull/630

4 years ago[flang] Fix errors in tests and predefined modules
Tim Keith [Tue, 6 Aug 2019 21:14:33 +0000 (14:14 -0700)]
[flang] Fix errors in tests and predefined modules

There were many places in tests and predefined modules that had
incorrect code that we weren't detecting until now.

Most of the problems were deferred-shape arrays that should have
been implied-shape. For example:
`real, parameter :: a(:) = [1.0, 2.0]`
should have `(*)` rather than `(:)`.

There were also a few places with deferred-shape arrays that were
not allocatable/pointer or explicit-shape ones that were.

Original-commit: flang-compiler/f18@0a959ce1d81dd2e54b72886db699b12c7ad59d88
Reviewed-on: https://github.com/flang-compiler/f18/pull/630

4 years ago[flang] Improve failure message from test_modfile.sh
Tim Keith [Tue, 6 Aug 2019 20:55:56 +0000 (13:55 -0700)]
[flang] Improve failure message from test_modfile.sh

When test_modfile.sh fails a test, show the path to the source file
so it is easier to find the problems when grepping the log.

Original-commit: flang-compiler/f18@4a0d0d19a0010b9342425a9b7f1db3ce4dada661
Reviewed-on: https://github.com/flang-compiler/f18/pull/630
Tree-same-pre-rewrite: false

4 years ago[flang] Perform more checks on array-specs
Tim Keith [Tue, 6 Aug 2019 20:48:13 +0000 (13:48 -0700)]
[flang] Perform more checks on array-specs

There are many constraints on what kind of array-specs can appear
in what contexts. Add `CheckArraySpec()` to perform most of them.
When the check fails, don't set the shape of the symbol being
declared and instead set the Error flag so we can avoid cascading
errors.

Fixes flang-compiler/f18#609.

Original-commit: flang-compiler/f18@f159d97f1f1e02b4d66e410b0f5a587f3c8fc51a
Reviewed-on: https://github.com/flang-compiler/f18/pull/630
Tree-same-pre-rewrite: false

4 years ago[flang] Change `ArraySpec` from a type alias to a class
Tim Keith [Tue, 6 Aug 2019 20:36:18 +0000 (13:36 -0700)]
[flang] Change `ArraySpec` from a type alias to a class

This allows it to have member functions `Rank()`, `IsExplicitShape()`,
`IsAssumedShape()`, etc. Make use of those new functions and remove
`isExplicit()` and `isDeferred()` from `ShapeSpec` as they are no
longer needed.

Original-commit: flang-compiler/f18@7ef7ad63594db9c41a0889d2ad419dbdf841cb6f
Reviewed-on: https://github.com/flang-compiler/f18/pull/630
Tree-same-pre-rewrite: false

4 years ago[flang] Change parsing of ambiguous array-spec
Tim Keith [Tue, 6 Aug 2019 17:20:16 +0000 (10:20 -0700)]
[flang] Change parsing of ambiguous array-spec

An array-spec like `(:,:)` (with one or more colons) is either a
deferred-shape-spec-list or an assumed-shape-spec-list and they
can only be distinguished by context that the parser doesn't have.

We were parsing these as assumed-shape-spec-list but they are easier
to deal with if we parse them as deferred-shape-spec-list because
anything that is the latter is also one of the former.

Original-commit: flang-compiler/f18@78c3f3b96f78e45b1b9966b331d8cda691fa39bd
Reviewed-on: https://github.com/flang-compiler/f18/pull/630
Tree-same-pre-rewrite: false

4 years ago[flang] Add operator<< for parser::CharBlock
Tim Keith [Tue, 6 Aug 2019 17:08:51 +0000 (10:08 -0700)]
[flang] Add operator<< for parser::CharBlock

Original-commit: flang-compiler/f18@439326dc968ffe097cbc6e156559860ec225af41
Reviewed-on: https://github.com/flang-compiler/f18/pull/630
Tree-same-pre-rewrite: false

4 years ago[flang] Merge pull request flang-compiler/f18#633 from flang-compiler/pmk-warnings
Peter Klausler [Wed, 7 Aug 2019 17:41:39 +0000 (10:41 -0700)]
[flang] Merge pull request flang-compiler/f18#633 from flang-compiler/pmk-warnings

Dodge two bogus warnings from g++ 8.1

Original-commit: flang-compiler/f18@2aa98a9d4d868ee18b43b2bcc70fd8831753c4fe
Reviewed-on: https://github.com/flang-compiler/f18/pull/633

4 years ago[flang] Dodge two bogus warnings from g++ 8.1
peter klausler [Wed, 7 Aug 2019 16:18:20 +0000 (09:18 -0700)]
[flang] Dodge two bogus warnings from g++ 8.1

Original-commit: flang-compiler/f18@aa19aeb92aedb02310a081f794c7a2046e801e2d
Reviewed-on: https://github.com/flang-compiler/f18/pull/633

4 years ago[flang] Merge pull request flang-compiler/f18#615 from flang-compiler/jpr-fix-581
jeanPerier [Wed, 7 Aug 2019 10:39:52 +0000 (03:39 -0700)]
[flang] Merge pull request flang-compiler/f18#615 from flang-compiler/jpr-fix-581

Fix issue 581: extended derived type kind parameter comparison

Original-commit: flang-compiler/f18@4670ae020b45848380fe0150b48a45b46aab0402
Reviewed-on: https://github.com/flang-compiler/f18/pull/615

4 years ago[flang] Answer comments
Jean Perier [Tue, 6 Aug 2019 11:40:43 +0000 (04:40 -0700)]
[flang] Answer comments
- make `TypaParamAttr` a `ParamValue` argument. Modify
  `GetParamValue` to also take this as an argument.
- remove `GetLenParamValue` that is now useless and
  modify constructor/`GetParamValue` calls
- get it the `TypeParamAttr` right from the begining
  when visiting `parser::DerivedTypeSpec` in resolve-names.cc.
  It was set to `Kind` by default and it was hard to ensure the
  attribute would not be checked until set properly.

Original-commit: flang-compiler/f18@bcc300e7141db6f692579e1327557c9831b9c85a
Reviewed-on: https://github.com/flang-compiler/f18/pull/615

4 years ago[flang] Fix ParamValue attribute (kind/len) of implicit type parameters
Jean Perier [Fri, 2 Aug 2019 13:38:40 +0000 (06:38 -0700)]
[flang] Fix ParamValue attribute (kind/len) of implicit type parameters
While testing fix for issue 581 it appeared that 'ParamValue`
implicit len parameters had incorrect attribute kind.
This commit:
 + Set correct attribute when creating `ParamValue` for implicit
   type parameter.
 + Also set the correct attribute foe charachter lenght `ParamValue`
   though it is currently not used anywhere.
 + Change some std::int64_t to common::ConstantSubscript on the way.

Original-commit: flang-compiler/f18@57a344b25607903638be6df47155bfe5515fff3a
Reviewed-on: https://github.com/flang-compiler/f18/pull/615
Tree-same-pre-rewrite: false

4 years ago[flang] Fix extended derived type kind compatibility check
Jean Perier [Fri, 2 Aug 2019 13:32:35 +0000 (06:32 -0700)]
[flang] Fix extended derived type kind compatibility check
`HaveCompatibleKindParameters` was not considering the kind
parameters of the parent types leading to false answers.
This change fixes this by directly looking into the map of `ParamValue`
of the `DeclTypeSpec` instead of going through the symbols of the derived
type scope. This map contains all the parent and implicit type parameters.

Original-commit: flang-compiler/f18@cd5b976fc96ec695d46f23910080cbcaa5431a5d
Reviewed-on: https://github.com/flang-compiler/f18/pull/615
Tree-same-pre-rewrite: false

4 years ago[flang] [OpenMP] parse tree changes for standalone directives (flang-compiler/f18...
Jinxin (Brian) Yang [Tue, 6 Aug 2019 18:59:40 +0000 (11:59 -0700)]
[flang] [OpenMP] parse tree changes for standalone directives (flang-compiler/f18#627)

* [OpenMP] parse tree changes for standalone directives

1. Put all standalone directives except FLUSH, CANCEL, and CANCELLATION POINT
   into one `OpenMPSimpleStandaloneConstruct` (for no-clause directive,
   validity checks will be deferred to Semantics). A top-level class will
   include all the standalone directive nodes. This simplies the logic a lot.

2. All the standalone directives now have their own source provenance for
   directive name itself.

3. Change check-omp-structure.* to avoid assertions

4. Add basic tests for standalone directives, more will be added during
   the clause validity checks in Semantics

* Resolve !$OMP ORDERED ambiguity by attempting block construct first - Peter

Original-commit: flang-compiler/f18@a77aa7ed84880927dea3e2b1bb6433350f99f1ac
Reviewed-on: https://github.com/flang-compiler/f18/pull/627

4 years ago[flang] Merge pull request flang-compiler/f18#612 from flang-compiler/ps-c1130
psteinfeld [Tue, 6 Aug 2019 17:20:22 +0000 (10:20 -0700)]
[flang] Merge pull request flang-compiler/f18#612 from flang-compiler/ps-c1130

Changes to enforce constraint C1130

Original-commit: flang-compiler/f18@88af7ce563eb1bff0f5ed32ea3f2fb10feea66d0
Reviewed-on: https://github.com/flang-compiler/f18/pull/612

4 years ago[flang] Responses to review comments.
Peter Steinfeld [Mon, 5 Aug 2019 20:36:01 +0000 (13:36 -0700)]
[flang] Responses to review comments.

 - dosemantics05.f90: Added tests for ASSOCIATE, BLOCK and SELECT TYPE statements and changed the error messages.
 - check-do.cc: Changed things so that FindScope() is only called once when DoConcurrentVariableEnforce is instantiated.  I changed the error message.  I changed the type and name of CS to be an std::set and be called SymbolContainer.
 - resolve-names.cc: I changed the Pre() function for parser::Statement to add the source range of a statement to both the current scope and all of its parents.  This fixed a problem with finding the current scope based on the source position.

Original-commit: flang-compiler/f18@085b2c18f3b6393a25beaa760a9d88a8ebd483f5
Reviewed-on: https://github.com/flang-compiler/f18/pull/612

4 years ago[flang] Changes to enforce constraint C1130.
Peter Steinfeld [Wed, 31 Jul 2019 21:01:31 +0000 (14:01 -0700)]
[flang] Changes to enforce constraint C1130.

The constraint states that "If the locality-spec DEFAULT ( NONE ) appears in a DO CONCURRENT statement; a variable that is a local or construct entity of a scope containing the DO CONCURRENT construct; and that appears in the block of the construct; shall have its locality explicitly specified by that statement."

Here's a summary of the changes:
 - In check-do.cc: Implemented the function
   CheckDefaultNoneImpliesExplicitLocality() to do the checking.  This involved
   adding the class DoConcurrentVariableEnforce to walk the DO loop's block
   looking for variable names.  I also cleaned up the code a little in
   CheckDoExpression() and EnforceConcurrentLoopControl().
 - Added the test dosemantics05.f90

Original-commit: flang-compiler/f18@2369aa805e36acafc2c59063cff3c4f5ae58be1a
Reviewed-on: https://github.com/flang-compiler/f18/pull/612
Tree-same-pre-rewrite: false

4 years ago[flang] Noted the constraint being tested.
Peter Steinfeld [Wed, 31 Jul 2019 17:31:19 +0000 (10:31 -0700)]
[flang] Noted the constraint being tested.

Original-commit: flang-compiler/f18@471aea65d86c3e67d70c02aa1b4d967cf745e501
Reviewed-on: https://github.com/flang-compiler/f18/pull/612
Tree-same-pre-rewrite: false

4 years ago[flang] [OpenMP] parse tree changes for declarative directives (flang-compiler/f18...
Jinxin (Brian) Yang [Mon, 5 Aug 2019 21:51:02 +0000 (14:51 -0700)]
[flang] [OpenMP] parse tree changes for declarative directives (flang-compiler/f18#620)

1. Changes are to save provenance for directive names
2. check-omp-structure.* is updated to avoid assertion errors
3. Tests added now are only for the basic usages for the declarative directives,
   more complete examples will be added once we start implementing the semantics
   checks for declarative directives

Original-commit: flang-compiler/f18@433e274f6876d5f0d6e2cc2e7e8c47ab01c07cc6
Reviewed-on: https://github.com/flang-compiler/f18/pull/620

4 years ago[flang] Merge pull request flang-compiler/f18#623 from flang-compiler/pmk-fixes
Peter Klausler [Mon, 5 Aug 2019 20:19:29 +0000 (13:19 -0700)]
[flang] Merge pull request flang-compiler/f18#623 from flang-compiler/pmk-fixes

Implement features to resolve bugs flang-compiler/f18#621 and flang-compiler/f18#622

Original-commit: flang-compiler/f18@2cd989479c3463b93067a2add5725ec591016d29
Reviewed-on: https://github.com/flang-compiler/f18/pull/623

4 years ago[flang] Remove obsolete code
peter klausler [Mon, 5 Aug 2019 19:47:43 +0000 (12:47 -0700)]
[flang] Remove obsolete code

Original-commit: flang-compiler/f18@81a97453a82e2b9773ee02eb43d78fac7c4ede52
Reviewed-on: https://github.com/flang-compiler/f18/pull/623

4 years ago[flang] Fold SIGN()
peter klausler [Mon, 5 Aug 2019 19:44:36 +0000 (12:44 -0700)]
[flang] Fold SIGN()

Original-commit: flang-compiler/f18@521a02ad518be9323f80abedbf5101d3c313c2bf
Reviewed-on: https://github.com/flang-compiler/f18/pull/623
Tree-same-pre-rewrite: false

4 years ago[flang] Fold DIGITS
peter klausler [Mon, 5 Aug 2019 17:46:54 +0000 (10:46 -0700)]
[flang] Fold DIGITS

Original-commit: flang-compiler/f18@6c9adff7a6260e3eecc81626147e3290e2346e22
Reviewed-on: https://github.com/flang-compiler/f18/pull/623
Tree-same-pre-rewrite: false

4 years ago[flang] Add DIGITS to intrinsic function table; fix results of some others
peter klausler [Mon, 5 Aug 2019 16:42:06 +0000 (09:42 -0700)]
[flang] Add DIGITS to intrinsic function table; fix results of some others

Original-commit: flang-compiler/f18@6d5caef352e1ffe28315c27c4d46adfe36b55173
Reviewed-on: https://github.com/flang-compiler/f18/pull/623
Tree-same-pre-rewrite: false

4 years ago[flang] Merge pull request flang-compiler/f18#619 from flang-compiler/klausler-patch-1
Peter Klausler [Fri, 2 Aug 2019 23:52:57 +0000 (16:52 -0700)]
[flang] Merge pull request flang-compiler/f18#619 from flang-compiler/klausler-patch-1

Update Extensions.md

Original-commit: flang-compiler/f18@6e4f320aeb86a78eebb81b7702fcb73c7423e00f
Reviewed-on: https://github.com/flang-compiler/f18/pull/619

4 years ago[flang] Update Extensions.md
Peter Klausler [Fri, 2 Aug 2019 22:42:54 +0000 (15:42 -0700)]
[flang] Update Extensions.md

Add note about type parameter declarations needing to come first in a derived type definition.

Original-commit: flang-compiler/f18@01358ac86e2a31b54900c38241a1ae01fedce0f6
Reviewed-on: https://github.com/flang-compiler/f18/pull/619

4 years ago[flang] Merge pull request flang-compiler/f18#611 from flang-compiler/pmk-bounds
Peter Klausler [Fri, 2 Aug 2019 18:15:24 +0000 (11:15 -0700)]
[flang] Merge pull request flang-compiler/f18#611 from flang-compiler/pmk-bounds

Fold LBOUND and UBOUND intrinsic functions

Original-commit: flang-compiler/f18@46d77ab006fd5a633ea9ab18b208ac9a7baee4f2
Reviewed-on: https://github.com/flang-compiler/f18/pull/611

4 years ago[flang] Fix test failure, clean up for merging
peter klausler [Fri, 2 Aug 2019 17:17:10 +0000 (10:17 -0700)]
[flang] Fix test failure, clean up for merging

Original-commit: flang-compiler/f18@77bad2736698cbbb9911ac5efd3efe6ac5b6d01a
Reviewed-on: https://github.com/flang-compiler/f18/pull/611

4 years ago[flang] Take suggestion from review comment
peter klausler [Thu, 1 Aug 2019 21:18:01 +0000 (14:18 -0700)]
[flang] Take suggestion from review comment

Original-commit: flang-compiler/f18@7616b1f71b4bc203f76f9acce258d2f7190d0729
Reviewed-on: https://github.com/flang-compiler/f18/pull/611
Tree-same-pre-rewrite: false

4 years ago[flang] Address review comment re: ALLOCATED intrinsic argument
peter klausler [Thu, 1 Aug 2019 21:01:06 +0000 (14:01 -0700)]
[flang] Address review comment re: ALLOCATED intrinsic argument

Original-commit: flang-compiler/f18@b24381c7df20b3e8157172e0f070ba602f39b820
Reviewed-on: https://github.com/flang-compiler/f18/pull/611
Tree-same-pre-rewrite: false

4 years ago[flang] Fix LBOUND/UBOUND of associated expr, add test
peter klausler [Thu, 1 Aug 2019 20:53:59 +0000 (13:53 -0700)]
[flang] Fix LBOUND/UBOUND of associated expr, add test

Original-commit: flang-compiler/f18@009095a9bc63ef4a4a7fa86f6d0ca3299fdcd409
Reviewed-on: https://github.com/flang-compiler/f18/pull/611
Tree-same-pre-rewrite: false

4 years ago[flang] Fix LBOUND & UBOUND(function()), add tests
peter klausler [Thu, 1 Aug 2019 19:32:17 +0000 (12:32 -0700)]
[flang] Fix LBOUND & UBOUND(function()), add tests

Original-commit: flang-compiler/f18@1e093e9927f94a06a19700a6de26b5bfefa659d9
Reviewed-on: https://github.com/flang-compiler/f18/pull/611
Tree-same-pre-rewrite: false

4 years ago[flang] Clean up some usage of std::optional lambda results
peter klausler [Thu, 1 Aug 2019 18:41:05 +0000 (11:41 -0700)]
[flang] Clean up some usage of std::optional lambda results

Original-commit: flang-compiler/f18@9a66f9da9767d19875a229dbef2532b57b7a79a6
Reviewed-on: https://github.com/flang-compiler/f18/pull/611
Tree-same-pre-rewrite: false

4 years ago[flang] Extract LBOUND/UBOUND folding into their own functions
peter klausler [Thu, 1 Aug 2019 17:29:43 +0000 (10:29 -0700)]
[flang] Extract LBOUND/UBOUND folding into their own functions

Original-commit: flang-compiler/f18@bf9146ad77c3db36b62d84093108048a807e528b
Reviewed-on: https://github.com/flang-compiler/f18/pull/611
Tree-same-pre-rewrite: false

4 years ago[flang] Address some review comments, fix crash
peter klausler [Thu, 1 Aug 2019 17:07:11 +0000 (10:07 -0700)]
[flang] Address some review comments, fix crash

Original-commit: flang-compiler/f18@7b7579eb5a896fb2b7d538f37a2df1a36b450f05
Reviewed-on: https://github.com/flang-compiler/f18/pull/611
Tree-same-pre-rewrite: false

4 years ago[flang] Handle association entities; fix problems found in testing
peter klausler [Wed, 31 Jul 2019 21:13:42 +0000 (14:13 -0700)]
[flang] Handle association entities; fix problems found in testing

Original-commit: flang-compiler/f18@c4d9fe95872decd9c305b4fec645229517a484c4
Reviewed-on: https://github.com/flang-compiler/f18/pull/611
Tree-same-pre-rewrite: false

4 years ago[flang] Fold LBOUND and UBOUND; do not insert empty triplets into whole array expressions
peter klausler [Tue, 30 Jul 2019 23:51:25 +0000 (16:51 -0700)]
[flang] Fold LBOUND and UBOUND; do not insert empty triplets into whole array expressions

Original-commit: flang-compiler/f18@82fba68a665802c990f35d14222f8df4ac4e1dee
Reviewed-on: https://github.com/flang-compiler/f18/pull/611
Tree-same-pre-rewrite: false

4 years ago[flang] Implement GetShape with expression visitor
peter klausler [Tue, 30 Jul 2019 18:33:06 +0000 (11:33 -0700)]
[flang] Implement GetShape with expression visitor

Original-commit: flang-compiler/f18@d607d028478ed931ce4f56b5e4e4ef3628a6d15e
Reviewed-on: https://github.com/flang-compiler/f18/pull/611
Tree-same-pre-rewrite: false

4 years ago[flang] Merge pull request flang-compiler/f18#617 from flang-compiler/tsk-issue616
Tim Keith [Fri, 2 Aug 2019 17:20:14 +0000 (10:20 -0700)]
[flang] Merge pull request flang-compiler/f18#617 from flang-compiler/tsk-issue616

Fix bug with use-associated base of component reference

Original-commit: flang-compiler/f18@ded6d831eecffdbba4a44bd6ac21f135a0905699
Reviewed-on: https://github.com/flang-compiler/f18/pull/617

4 years ago[flang] Fix bug with use-associated base of component reference
Tim Keith [Fri, 2 Aug 2019 16:21:34 +0000 (09:21 -0700)]
[flang] Fix bug with use-associated base of component reference

When the base of a component reference (`a` in `a%b`) was use
associated, we were failing to follow it to the real symbol.

Fixes flang-compiler/f18#616.

Original-commit: flang-compiler/f18@95bfac6f65eccfedd03d791f01267d43497c6153
Reviewed-on: https://github.com/flang-compiler/f18/pull/617

4 years ago[flang] Merge pull request flang-compiler/f18#613 from flang-compiler/pmk-component...
Peter Klausler [Fri, 2 Aug 2019 16:20:50 +0000 (09:20 -0700)]
[flang] Merge pull request flang-compiler/f18#613 from flang-compiler/pmk-component-scope

Correct scopes of components

Original-commit: flang-compiler/f18@00bdacd6d416b6c2d22552a7a88bc599c6f5f1aa
Reviewed-on: https://github.com/flang-compiler/f18/pull/613

4 years ago[flang] Do not inherit bindings as bare names, just components and type parameters
peter klausler [Wed, 31 Jul 2019 23:20:55 +0000 (16:20 -0700)]
[flang] Do not inherit bindings as bare names, just components and type parameters

Original-commit: flang-compiler/f18@c4c70a6a8160b7f8c675021f3cbe88d4054c3aab
Reviewed-on: https://github.com/flang-compiler/f18/pull/613

4 years ago[flang] Correct scopes of components and type parameters
peter klausler [Wed, 31 Jul 2019 22:23:01 +0000 (15:23 -0700)]
[flang] Correct scopes of components and type parameters

Original-commit: flang-compiler/f18@6d9f85a2410d82b0f9880d3e8cf358d7c0236f05
Reviewed-on: https://github.com/flang-compiler/f18/pull/613
Tree-same-pre-rewrite: false

4 years ago[flang] [OpenMP] Add Sections and Single Construct check (flang-compiler/f18#585)
Jinxin (Brian) Yang [Thu, 1 Aug 2019 21:32:33 +0000 (14:32 -0700)]
[flang] [OpenMP] Add Sections and Single Construct check (flang-compiler/f18#585)

* [OpenMP] Add Sections and Single Construct check

Parse tree for OmpEndSingle needs to be modified to save the provenance
of END SINGLE directive and check its own clauses

* Update on reviews

1. PushContext is created to push new context with source provenance

2. Tweak the logic for SECTION nesting, treak Orphaned or wrong nesting
   as the same error type

3. Make sure the check for NOWAIT clause only applies to the ones that
   are not handled by parser.
   Note that the case for DO or DO_SIMD will take effect after the
   loop association work (parse tree change) is done. But I still list
   them there for completeness.

4. Happen to find that NOWAIT is not accepted by PARALLEL SECTIONS,
   fixed it in the parser.

Original-commit: flang-compiler/f18@236cf1efea77b8af5c533aa55029ce49a2c2e72c
Reviewed-on: https://github.com/flang-compiler/f18/pull/585

4 years ago[flang] Merge pull request flang-compiler/f18#614 from flang-compiler/tsk-generics
Tim Keith [Thu, 1 Aug 2019 21:07:38 +0000 (14:07 -0700)]
[flang] Merge pull request flang-compiler/f18#614 from flang-compiler/tsk-generics

 Improve handling of generics with same name as type or procedure

Original-commit: flang-compiler/f18@a1e26df148c4d480178aa8b765aad4ceaaa5eae2
Reviewed-on: https://github.com/flang-compiler/f18/pull/614

4 years ago[flang] Fix merging of use associated generics
Tim Keith [Thu, 1 Aug 2019 20:06:25 +0000 (13:06 -0700)]
[flang] Fix merging of use associated generics

When we use-associate a generic interface name and then add more
procedures to the generic, we create a new symbol for the merged
generic. That symbol has to include a pointer to the derived type
or procedure with the same name, just as the original generic did.

To achieve that, change `AddSpecificProcsFrom` to also copy those
fields from the original symbol and change its name to `CopyFrom`
to reflect its new purpose. Also, change it to take `GenericDetails`
instead of `Symbol` as its argument so we can't call it on the wrong
kind of symbol.

Original-commit: flang-compiler/f18@1e22970e4352775df8a32e018435743786a66280
Reviewed-on: https://github.com/flang-compiler/f18/pull/614

4 years ago[flang] Fix bug when writing empty generic to .mod file
Tim Keith [Wed, 31 Jul 2019 22:53:46 +0000 (15:53 -0700)]
[flang] Fix bug when writing empty generic to .mod file

When a generic interface had no specific procedures, we were writing
it the `.mod` file as `generic::g=>`, which is not valid Fortran.

Change to writing generics as interface blocks rather than generic
statements so that this case is handled. Include an access stmt if it
was declared private.

Also fix a bug in `test_errors.sh` where the expected/actual error
messages weren't sorted by line number correctly.

Original-commit: flang-compiler/f18@1c32a289b53d787c0033ed45033db86afde33458
Reviewed-on: https://github.com/flang-compiler/f18/pull/614
Tree-same-pre-rewrite: false

4 years ago[flang] Improve handling of generics with same name as type or procedure
Tim Keith [Tue, 30 Jul 2019 22:29:50 +0000 (15:29 -0700)]
[flang] Improve handling of generics with same name as type or procedure

Create symbols for generics in a pre-pass over the specification part so
it is easier to handle cases when they have the same name as a derived
type or subprogram. This is done by calling `PreSpecificationConstruct`
on each `SpecificationConstruct` of a specification part before we
continue walking it. The generics symbols are created there and the same
mechanism will be used to handle forward references to derived types.

Report an error when the same name is used for a generic interface,
derived type, and subprogram.

Improve the error message issued when a procedure and generic interface
have the same name but the procedure is not a specific of the generic.

Change `SayAlreadyDeclared` to report the error on the second occurence
of the name when possible. This can arise for declarations the are
processed out of order, e.g. contained subprograms and generic interfaces.

Avoid multiple "already declared" errors for the case when a contained
subprogram has the same name as a declared entity. We first create the
symbol with SubprogramNameDetails, then replace it with the entity (and
report the error), then replace it with the real subprogram (and get the
error again). By setting and checking the error flag we avoid the second
error.

Original-commit: flang-compiler/f18@48fc0767834154a7dbe9d5a964e603855ca88ab5
Reviewed-on: https://github.com/flang-compiler/f18/pull/614
Tree-same-pre-rewrite: false

4 years ago[flang] Merge pull request flang-compiler/f18#608 from flang-compiler/tsk-deref
Tim Keith [Tue, 30 Jul 2019 13:13:19 +0000 (06:13 -0700)]
[flang] Merge pull request flang-compiler/f18#608 from flang-compiler/tsk-deref

Add a way to check and dereference a pointer

Original-commit: flang-compiler/f18@31a3fae9f893565392e35fd3df1612615363dcdd
Reviewed-on: https://github.com/flang-compiler/f18/pull/608

4 years ago[flang] Add a way to check and dereference a pointer
Tim Keith [Mon, 29 Jul 2019 16:12:52 +0000 (09:12 -0700)]
[flang] Add a way to check and dereference a pointer

It is common to get a pointer, check it is not null, and dereference it.
Sometimes that requires a named temporary just to be able to do the check.

The macro `DEREF(p)` provides this capability: it asserts that `p` is not null
and returns `*p`. This is analagous to `.value()` on an `std::optional`.

We might want to add a way to disable `CHECK` and the check in `DEREF` together.

This change also includes some examples of making use of `DEREF`.

Original-commit: flang-compiler/f18@d7aa90e55ac80c7f2460ab7b0cb6d1ef0c068938
Reviewed-on: https://github.com/flang-compiler/f18/pull/608

4 years ago[flang] Merge pull request flang-compiler/f18#596 from flang-compiler/ps-variable...
psteinfeld [Thu, 25 Jul 2019 23:41:14 +0000 (16:41 -0700)]
[flang] Merge pull request flang-compiler/f18#596 from flang-compiler/ps-variable-definition

Changes for constraint C1128

Original-commit: flang-compiler/f18@d79137104ef0ab679b95d5393318aad4840e7e53
Reviewed-on: https://github.com/flang-compiler/f18/pull/596

4 years ago[flang] More changes in response to review comments.
Peter Steinfeld [Thu, 25 Jul 2019 19:54:11 +0000 (12:54 -0700)]
[flang] More changes in response to review comments.

 - resolve-names.cc: I reworded the message when a name appears in a
   locality-spec when a name is used that cannot appear in a variable
   definition context.
 - tools.cc: I removed the unused functions ```IsValueDummy()``` and
   ```IsModifiable()```.  I made the function ```GetAssociatedVariable()```
   static.  I cleaned up the code in ```GetAssociationRoot()```.  I cleaned up
   the code in ```IsOrContainsEventOrLockComponent()```.  I added a TODO to
   ```WhyNotModifiable()``` and made some other improvements to it.
 - tools.h: Removed some deleted and unnecessary functions.
 - I fixed up a couple of tests related to the changes in error messages.

Original-commit: flang-compiler/f18@47da8ff9c8c131a6fc7a4a6f4a8fa89c8b582b71
Reviewed-on: https://github.com/flang-compiler/f18/pull/596

4 years ago[flang] Responses to previous review comments, specifically --
Peter Steinfeld [Tue, 23 Jul 2019 23:34:55 +0000 (16:34 -0700)]
[flang] Responses to previous review comments, specifically --

 - expression.cc - fixed an error message.  This required changing the tests
 structconst0[3,4].f90
 - tools.[h,cc] - Added a new function called ```WhyNotModifiable()``` to see
 if a name can be modified.  This function returns a string that describes why
 the name cannot be modified.  I changed the existing function
 ```IsModifiable()``` to call ```WhyNotModifiable()```.  I fixed and
 restructured the code for ```GetAssociationRoot()```.  This involved creating
 the mutually recursive function ```GetAssociatedVariable()```.  I added a
 check  to see if a name is an INTENT(IN) dummy argument to the function
 ```IsVariableName()```.
 - resolve-names.cc - Wrote the function ```SayWithReason()``` that allows an
 arbitrary message to be added to an existing message.  I changed the code in
 ```PassesLocalityChecks()``` to call the new function ```WhyNotModifiable()```
 to get the specifics of why a variable name cannot be used in a variable
 modification context and then call the new function ```SayWithReason()``` to
 report the error.  I also cleaned up the code as per Jean's suggestion.

Original-commit: flang-compiler/f18@8a2f4bdfd24a568a87b3bcb9faa9bc87a68eee84
Reviewed-on: https://github.com/flang-compiler/f18/pull/596
Tree-same-pre-rewrite: false

4 years ago[flang] Changes for constraint C1128.
Peter Steinfeld [Fri, 19 Jul 2019 22:17:14 +0000 (15:17 -0700)]
[flang] Changes for constraint C1128.

Specifically, these changes enforce the last sentence of the constraint, which
prohibits names that cannot appear in a variable definition context from
appearing in a locality-spec.  Here are the details.

 - Created the function "IsModifiableName" to return "true" when its parameter
   is the name of a variable that can appear in a variable definition context.
 - Created the function "GetAssociationRoot" to follow construct associations
   to potentially get to an underlying variable.  This function is similar to
   the existing "GetUltimate" function that follows use associations and host
   associations.  One difference is that "GetAssociationRoot" requires access
   to the types "MaybeExpr" and "SomeExpr", which makes is inappropriate to put
   into symbol.cc, which is where "GetUltimate" lives.  Perhaps we should move
   "GetUltimate" to tools.[h,cc].
 - Generalized the functions "IsPureFunction" to "IsPureProcedure" since either
   a pure function or subroutine can provide a context for variables that
   cannot be modified.  Changed "FindPureFunctionContaining" to
   "FindPureProcedueContaining" to go along with this.
 - Added the function "IsExternalInPureContext" to detect the case where a
   nominally pure procedure potentially modifies a variable.
 - Created the function "IsOrContainsEventOrLockComponent" to detect variables
   that either are of EVENT_TYPE or LOCK_TYPE or contain components of these
   types.  Such variables cannot appear in variable definition contexts.
 - Added the test resolve56.f90 to test most of these conditions.  Note that I
   only tested the new code from the perspective of locality-specs.

Original-commit: flang-compiler/f18@c9d2507b74da881dda2eb11805a0394a415db2e4
Reviewed-on: https://github.com/flang-compiler/f18/pull/596
Tree-same-pre-rewrite: false

4 years ago[flang] Merge pull request flang-compiler/f18#603 from flang-compiler/pmk-fix
Peter Klausler [Thu, 25 Jul 2019 17:49:23 +0000 (10:49 -0700)]
[flang] Merge pull request flang-compiler/f18#603 from flang-compiler/pmk-fix

Fix IsVariable for Pete

Original-commit: flang-compiler/f18@73e8c365e2b05904e0a3950f4c0813b445333ba1
Reviewed-on: https://github.com/flang-compiler/f18/pull/603

4 years ago[flang] Fix bug
peter klausler [Thu, 25 Jul 2019 17:04:22 +0000 (10:04 -0700)]
[flang] Fix bug

Original-commit: flang-compiler/f18@482f882e3f8c5d6dae699949eb848001dc65bbc7
Reviewed-on: https://github.com/flang-compiler/f18/pull/603

4 years ago[flang] Fix IsVariable for Pete
peter klausler [Wed, 24 Jul 2019 22:49:42 +0000 (15:49 -0700)]
[flang] Fix IsVariable for Pete

Original-commit: flang-compiler/f18@4a24f74ae476f7d315bb68ed62f7dd39ad3b4d10
Reviewed-on: https://github.com/flang-compiler/f18/pull/603
Tree-same-pre-rewrite: false

4 years ago[flang] Merge pull request flang-compiler/f18#602 from flang-compiler/pmk-next
Peter Klausler [Thu, 25 Jul 2019 17:30:22 +0000 (10:30 -0700)]
[flang] Merge pull request flang-compiler/f18#602 from flang-compiler/pmk-next

Fold more model inquiry intrinsics

Original-commit: flang-compiler/f18@7d1aeea40979d4d545b0f21f079ccd39ac6012a0
Reviewed-on: https://github.com/flang-compiler/f18/pull/602

4 years ago[flang] Address comments; allow "real,parameter::x=tiny(x)"
peter klausler [Thu, 25 Jul 2019 17:16:28 +0000 (10:16 -0700)]
[flang] Address comments; allow "real,parameter::x=tiny(x)"

Original-commit: flang-compiler/f18@e865358871da6211790b2869a58db7239d9c2e68
Reviewed-on: https://github.com/flang-compiler/f18/pull/602

4 years ago[flang] Fold more model inquiry intrinsics
peter klausler [Wed, 24 Jul 2019 20:55:29 +0000 (13:55 -0700)]
[flang] Fold more model inquiry intrinsics

Original-commit: flang-compiler/f18@a3d82893b768865aa51f105f92805f61a87d95f1
Reviewed-on: https://github.com/flang-compiler/f18/pull/602
Tree-same-pre-rewrite: false

4 years ago[flang] Merge pull request flang-compiler/f18#583 from flang-compiler/jpr-fix-582
jeanPerier [Wed, 24 Jul 2019 17:07:30 +0000 (10:07 -0700)]
[flang] Merge pull request flang-compiler/f18#583 from flang-compiler/jpr-fix-582

Fix issue flang-compiler/f18#582: implicit ac-do-variable kind in expressions

Original-commit: flang-compiler/f18@cebc2be4b1a05a921993e7c4d7a1082cd724679f
Reviewed-on: https://github.com/flang-compiler/f18/pull/583

5 years ago[flang] Fix issue flang-compiler/f18#582: implicit ac-do-variable kind in expressions
Jean Perier [Wed, 17 Jul 2019 12:19:10 +0000 (05:19 -0700)]
[flang] Fix issue flang-compiler/f18#582: implicit ac-do-variable kind in expressions

Original-commit: flang-compiler/f18@4150a5e41147940dd2b8e951becaf6ded0447fc4
Reviewed-on: https://github.com/flang-compiler/f18/pull/583