[flang] Check bounds on pointer assignment

Perform checks on bounds-spec and bounds-remapping in a pointer
assignment statement:
- check that the rank of the bounds specified matches the rank of the
  pointer
- for bounds-spec, check that the pointer rank matches the target rank
- for bounds-remapping:
  - check that the target is rank 1 or simply contiguous
  - check that there are sufficient elements on the RHS for the bounds
    specified, when it can be determined at compile time

Move more of the pointer-specific checking from `assignment.cc`
to `pointer-assignment.cc`.

Original-commit: flang-compiler/f18@7489b3539224f8ad7a55873916e5854510236218
Reviewed-on: https://github.com/flang-compiler/f18/pull/944

[flang] Refactor Analyze(PointerAssignmentStmt)

Use early returns to reduce the indentation.
Check LHS is a pointer as early as possible.
A PointerAssignmentStmt can only have a typedAssignment that
represents a PointerAssignment. So assert that is the case and
don't worry about the other cases.

Original-commit: flang-compiler/f18@bdf3d3a292b5f9ce4241e3d63b759bd61838cf18
Reviewed-on: https://github.com/flang-compiler/f18/pull/944
Tree-same-pre-rewrite: false

[flang] Make GenericAssignmentWrapper more like GenericExprWrapper

Have it wrap an optional Assignment so that we can distinguish between
unanalyzed and analyzed with error.

Change analysis of PointerAssignmentStmt to proceed with bounds even
if the DataRef or Expr has an error. Otherwise any bounds expressions
won't be analyzed in that case.

In GetExpr() and GetAssignment() if we get an internal error due to an
unanalyzed expression, dump the parse tree for the expression so we have
some context for the error. They should only be called after the
expression analysis phase. At that point, every expression and assignment
should be analyzed, though some may have resulted in errors(indicated by
returning `nullptr`).

Original-commit: flang-compiler/f18@3b865d7703f53099cd491ed1aa9b80b46fee9f58
Reviewed-on: https://github.com/flang-compiler/f18/pull/944
Tree-same-pre-rewrite: false

[flang] Add `std::string ExpressionBase::AsFortran()`

This is easier to use when including an expression in an error message
and also useful when debugging for dumping expressions.

Fix up several places that no longer need to use a temporary
std::stringstream.

Also change some references to `operator<<` in `formatting.cc` and
`symbol.cc` that became ambiguous with this change.

Original-commit: flang-compiler/f18@25dc49b6e9cf5bce61d6d655ab242609cbd28e13
Reviewed-on: https://github.com/flang-compiler/f18/pull/944
Tree-same-pre-rewrite: false

[flang] Merge pull request flang-compiler/f18#936 from flang-compiler/ps-checklist

Checklist to precede pull requests

Original-commit: flang-compiler/f18@b1e67c4a40d8cdd0a8f7429ad1780e25798e0136
Reviewed-on: https://github.com/flang-compiler/f18/pull/936

[flang] Checklist to precede pull requests

I added a checklist to the C++ Style document for things to check before
submitting a pull request or when responding to a request for comments
on a pull request.

Original-commit: flang-compiler/f18@903420268a5aabbab9acdf8788b4344c395ee597
Reviewed-on: https://github.com/flang-compiler/f18/pull/936

[flang] Merge pull request flang-compiler/f18#938 from flang-compiler/pmk-fix-rank

Fix shape analysis of RHS designators of pointer assignments

Original-commit: flang-compiler/f18@0423347d69e4422e080a59dfec00c850bf1ddcc2
Reviewed-on: https://github.com/flang-compiler/f18/pull/938

[flang] Fix shape analysis of RHS designators of pointer assignments

Original-commit: flang-compiler/f18@bf26a36ef4255188b294a73bdc138dfba52cf5d3
Reviewed-on: https://github.com/flang-compiler/f18/pull/938

[flang] Merge pull request flang-compiler/f18#937 from flang-compiler/tsk-pointer

Fix checking of pointer target with association

Original-commit: flang-compiler/f18@6b3dc6d5ece54c2d051bec5bf01c0c7c8532819f
Reviewed-on: https://github.com/flang-compiler/f18/pull/937

[flang] Fix checking of pointer target with association

When checking if the target of a pointer assignment is valid, we
weren't following associations. E.g. we complained about the assignment
below if `b` had the TARGET attribute but `c` did not:
```
associate(a => b%c)
  p => a
end associate
```

The fix is to change `GetSymbolVector()` to follow associations in
creating the chain of symbols from a designator.

Add tests for this, and also some other cases where TARGET is on the
derived type variable rather than the component (which worked but didn't
have tests).

Original-commit: flang-compiler/f18@c81c6baedd41d6ca2d36c81ca745a144c02be369
Reviewed-on: https://github.com/flang-compiler/f18/pull/937

[flang] Merge pull request flang-compiler/f18#927 from flang-compiler/pmk-format

Runtime FORMAT scanning

Original-commit: flang-compiler/f18@538d4a1dea9d2301fe36b13d1b248fde5c010f83
Reviewed-on: https://github.com/flang-compiler/f18/pull/927

[flang] begin processing format strings

Move RoundingMode to Fortran.h

Always skip blanks outside character literals & Hollerith

Templatize

optimize repeat counts somewhat

Fix license punctuation, remove patch

Original-commit: flang-compiler/f18@4a0d39b0398974ade4367a5a96e11a90e853c18c
Reviewed-on: https://github.com/flang-compiler/f18/pull/927

[flang] Merge pull request flang-compiler/f18#926 from flang-compiler/pmk-bd

BLOCK DATA semantics

Original-commit: flang-compiler/f18@4954b95527a48d5242731c91a7181a001bf64283
Reviewed-on: https://github.com/flang-compiler/f18/pull/926

[flang] Comments

Original-commit: flang-compiler/f18@0c12188e8437abf820381fea787c625eda7e2d1f
Reviewed-on: https://github.com/flang-compiler/f18/pull/926

[flang] Better EQUIVALENCE handling

Original-commit: flang-compiler/f18@7c55097e81c9ab76953c1c652128bc9b969e6a33
Reviewed-on: https://github.com/flang-compiler/f18/pull/926
Tree-same-pre-rewrite: false

[flang] Better fix; clean up redundant utilities

Original-commit: flang-compiler/f18@531db4932155f53f14805b8a6617e31803ab6435
Reviewed-on: https://github.com/flang-compiler/f18/pull/926
Tree-same-pre-rewrite: false

[flang] Fix unrelated build error found in testing

Original-commit: flang-compiler/f18@5a00d77827feda979f2b11a33a22b7c7b05e824a
Reviewed-on: https://github.com/flang-compiler/f18/pull/926
Tree-same-pre-rewrite: false

[flang] Update a test

Original-commit: flang-compiler/f18@5f32183eed19560a57a68ae9fd0eec72d18c7a40
Reviewed-on: https://github.com/flang-compiler/f18/pull/926
Tree-same-pre-rewrite: false

[flang] Address review comments

Original-commit: flang-compiler/f18@d179c796bd7271916c52d8478e60a88bff809564
Reviewed-on: https://github.com/flang-compiler/f18/pull/926
Tree-same-pre-rewrite: false

[flang] Better check for variables in DATA

Original-commit: flang-compiler/f18@92e20baaa89fd20cd724bb4414e84670843cc442
Reviewed-on: https://github.com/flang-compiler/f18/pull/926
Tree-same-pre-rewrite: false

[flang] Fix bug

Original-commit: flang-compiler/f18@662b8139b5d17b39222b2d297114606e86fa83d7
Reviewed-on: https://github.com/flang-compiler/f18/pull/926
Tree-same-pre-rewrite: false

[flang] More comments addressed

Original-commit: flang-compiler/f18@9c863a572b39beca7f1f3e86edb239e6d3b72d4f
Reviewed-on: https://github.com/flang-compiler/f18/pull/926
Tree-same-pre-rewrite: false

[flang] Address review comments

Original-commit: flang-compiler/f18@59e5565cb87eebd2c4f44defd22484ca83777942
Reviewed-on: https://github.com/flang-compiler/f18/pull/926
Tree-same-pre-rewrite: false

[flang] BLOCK DATA

add test

Original-commit: flang-compiler/f18@91c084b698b0617da5d7592a5b1830adc5c5d84e
Reviewed-on: https://github.com/flang-compiler/f18/pull/926
Tree-same-pre-rewrite: false

[flang] Merge pull request flang-compiler/f18#928 from flang-compiler/tsk-assignment3

Pointer assignment semantic checks

Original-commit: flang-compiler/f18@fc600af81e1a5c75d4f619bed3feb6194117b54d
Reviewed-on: https://github.com/flang-compiler/f18/pull/928

[flang] Pointer assignment semantic checks

Call `CheckPointerAssignment()` when analyzing a pointer assignment
statement. NOTE: the cases with bounds-spec and bounds-remapping are
still to be done.

Perform checks on pointer symbols in `check-declarations.cc`.

Check for pointer to generic intrinsic in `semantics/expression.cc`.

Add the other required pointer assignment checks to `pointer-assignment.cc`.

Original-commit: flang-compiler/f18@3dc5fd6d9e58d1ef0efd1deefcbaa52499ad93f9
Reviewed-on: https://github.com/flang-compiler/f18/pull/928

[flang] C1027: procedure pointer may not be coindexed object

Original-commit: flang-compiler/f18@4261daf352edefabee5c97f0ed0da09280240a86
Reviewed-on: https://github.com/flang-compiler/f18/pull/928
Tree-same-pre-rewrite: false

[flang] Add IntrinsicProcTable::IsSpecificIntrinsicFunction

This replaces IsUnrestrictedSpecificIntrinsicFunction and returns
information that allows the caller to distinguish between restricted
and unrestricted intrinsics.

The new case in `resolve46.f90` used to get an internal error.

Original-commit: flang-compiler/f18@4cb1ee10b90bbc5e3c4899ab136fad4d1e841195
Reviewed-on: https://github.com/flang-compiler/f18/pull/928
Tree-same-pre-rewrite: false

[flang] Make Fortran form of intrinsic types uppercase

`DynamicType::AsFortran` was using mixed case for intrinic type names.
Make it upper case for consistency with TYPE(...) and CHARACTER when a
length is present and other error messages.

Original-commit: flang-compiler/f18@e16909d67f16425b267511e5fe33f2ff72f69ee9
Reviewed-on: https://github.com/flang-compiler/f18/pull/928
Tree-same-pre-rewrite: false

[flang] Move pointer assignment checking to its own file

Create `pointer-assignment.{h,cc}` for pointer assignment checking.
It doesn't share with assignment checking so it should be its own file.
Move the code into semantics namespace.

Original-commit: flang-compiler/f18@1658aba81f24fe3913298e76ae8b9c938bd4d248
Reviewed-on: https://github.com/flang-compiler/f18/pull/928
Tree-same-pre-rewrite: false

[flang] Clean up AssignmentContext

Eliminate `at_` and use location from `SemanticsContext` instead.

Add and use Analyze functions for `std::optional` and `std::list`.

Original-commit: flang-compiler/f18@e171029ccdb9efe874cad3a3d91adcfa200a6550
Reviewed-on: https://github.com/flang-compiler/f18/pull/928
Tree-same-pre-rewrite: false

[flang] Merge pull request flang-compiler/f18#933 from flang-compiler/tsk-issues

Move checks for valid array-spec to check-declarations.cc

Original-commit: flang-compiler/f18@7cf6f6137d93a6faca40a835cdabaecebe02d219
Reviewed-on: https://github.com/flang-compiler/f18/pull/933

[flang] Move checks for valid array-spec to check-declarations.cc

At the time we finish processing an array-spec in `resolve-names.cc`,
we don't know if the entity is going to be declared ALLOCATABLE later
so we can't check for validity there. In the new test in `resolve58.f90`
(based on issue flang-compiler/f18#930) we were reporting an error on `b` and not on `a`
when it should be the reverse.

The fix is to move array-spec checking to `check-declarations.cc`,
after name resolution is complete.

Fixes flang-compiler/f18#930.

Original-commit: flang-compiler/f18@c596d2fef7628236676c1939659f4eb956e4df35
Reviewed-on: https://github.com/flang-compiler/f18/pull/933

[flang] Merge pull request flang-compiler/f18#932 from flang-compiler/pmk-fix-931

Fix bug flang-compiler/f18#931: spurious error reported on CSHIFT

Original-commit: flang-compiler/f18@6adae0b7f4196e54b874c4d0aca93c5cb2d01bd7
Reviewed-on: https://github.com/flang-compiler/f18/pull/932

[flang] Fix bug flang-compiler/f18#931: spurious error reported on CSHIFT

Original-commit: flang-compiler/f18@bd9bd788652975ac11a24fd5d10197be80c78603
Reviewed-on: https://github.com/flang-compiler/f18/pull/932

[flang] Regression tests configuration for f18 repository (flang-compiler/f18#861)

The configuration for the tests are in lit.* files.
The lit tests rely on the presence of llvm-lit,FileCheck, not and  count.
When building LLVM add:
-DLLVM_INSTALL_UTILS=On at the cmake command.
LLVM_LIT is found by setting LLVM_EXTERNAL_LIT in f18 CMakeLists.txt.

This patch:
  * Uses LLVM_EXTERNAL_LIT
  * Adds regression tests configurations
  * Adds a proof of concept regression test

The regression test needs to have the Utils build in LLVM.
This is done by adding:
  -DLLVM_INSTALL_UTILS=On
to the LLVM build cmake.

Signed-off-by: Caroline Concatto <caroline.concatto@arm.com>
Original-commit: flang-compiler/f18@a58c6067a1ab5cd02dfb5b6fb9919a20b960d984
Reviewed-on: https://github.com/flang-compiler/f18/pull/861

[flang] Outline operator<< for CharBlock. (flang-compiler/f18#916)

This fixes an issue where the Dump function definitions in dump.cc
were relying on the forward declaration of operator<< for CharBlock
which was marked inline and only present in char-block.h.

This is not allowed under section 6.2.10 of the C++17 standard, and
caused a compilation failure when building with clang 9 as this was
inlining every use of the function and therefore not generating an
outlined definition for linking.

Original-commit: flang-compiler/f18@3ad75d123b666a5081540f2afedbedde930b2518
Reviewed-on: https://github.com/flang-compiler/f18/pull/916

[flang] Merge pull request flang-compiler/f18#924 from flang-compiler/ps-cleanup-do-check

Removed an unnecessary check after Tim fixed issue flang-compiler/f18#915.

Original-commit: flang-compiler/f18@538a6dd5e27e3a159b84cd167f46bbbf656c8cfe
Reviewed-on: https://github.com/flang-compiler/f18/pull/924

[flang] Removed an unnecessary check after Tim fixed issue flang-compiler/f18#915.

Original-commit: flang-compiler/f18@348b04bc1c313d5d18ebb133441967547d4c7d6d
Reviewed-on: https://github.com/flang-compiler/f18/pull/924

[flang] Merge pull request flang-compiler/f18#918 from flang-compiler/ps-do-func

Checks for DO variables passed to INTENT(OUT) dummies in functions

Original-commit: flang-compiler/f18@ab8fd34a718ca93d6e621b8818cfa6c2e1e948bf
Reviewed-on: https://github.com/flang-compiler/f18/pull/918

[flang] Checks for DO variables passed to INTENT(OUT) dummies in functions

I added a traveral framework to find actual arguments in expressions.
For arguments that are DO variables being passed to dummy arguments with
INTENT(OUT), I emit an error message.  For INTENT(INOUT), I emit a
warning.

Original-commit: flang-compiler/f18@815dbed75c2cae778b4a65022a9c1f6ad4cf3d47
Reviewed-on: https://github.com/flang-compiler/f18/pull/918

[flang] Merge pull request flang-compiler/f18#923 from flang-compiler/tsk-expr2

Detect incorrect use of assumed-type dummy arguments

Original-commit: flang-compiler/f18@b29f284325f95efbba2b9da35282b2e066f65446
Reviewed-on: https://github.com/flang-compiler/f18/pull/923

[flang] Detect incorrect use of assumed-type dummy arguments

Assumed-type dummy arguments can only be used as actual arguments. If
they are used in other contexts it is an error. Change argument analysis
to handle these differently depending on the context. `allowAssumedType`
is set when the argument can be assumed-type. These expressions now all
get `typedExpr` set to `nullopt`.

Change `AnalyzeSectionSubscripts` to analyze all of the subscripts
even if one has an error. This ensures they all get analyzed expressions
(or `nullopt` in case of error).

Fix a bug analyzing `BoundsRemapping`: the lower bound was analyzed
twice and the upper bound not at all.

These change mean that `typedExpr` is set in all known cases.
Fixes flang-compiler/f18#915.

Original-commit: flang-compiler/f18@679ef69905e39f39454768264059afd85b615840
Reviewed-on: https://github.com/flang-compiler/f18/pull/923

[flang] Merge pull request flang-compiler/f18#922 from flang-compiler/gak-fix-comments

Minor format change to LLVM license lines

Original-commit: flang-compiler/f18@9c7406324dc3768886ec8d2baf92b0d9395291be
Reviewed-on: https://github.com/flang-compiler/f18/pull/922

[flang] Minor format change to LLVM license lines

Replace comment lines containing all dashes with the
proper ===-----....----=== markers.

Original-commit: flang-compiler/f18@a8936b0d4187a9a9ef43f9d34055a3213beeb9d2
Reviewed-on: https://github.com/flang-compiler/f18/pull/922

[flang] Merge pull request flang-compiler/f18#919 from flang-compiler/pmk-fix-power-build

Dodge build problem in some Power environments

Original-commit: flang-compiler/f18@5b7f08abd79d3c59723dad6e8de0568c834479e1
Reviewed-on: https://github.com/flang-compiler/f18/pull/919

[flang] Dodge build problem in some Power environments

Original-commit: flang-compiler/f18@f24abf19c4aac3869459cd0984473ea3b5232d12
Reviewed-on: https://github.com/flang-compiler/f18/pull/919

[flang] Merge pull request flang-compiler/f18#914 from flang-compiler/pmk-runtime-1

Start, stop, and error routines for runtime

Original-commit: flang-compiler/f18@42ff2d005242d71f80a9460c00cbcec3e8323971
Reviewed-on: https://github.com/flang-compiler/f18/pull/914

[flang] Runtime starting and stopping

Define ImageTerminator as a mixin-able class

Turn start.cc into main.cc

Original-commit: flang-compiler/f18@cbc6225213075a0bdd778fd25721aa8388908e07
Reviewed-on: https://github.com/flang-compiler/f18/pull/914

[flang] Merge pull request flang-compiler/f18#917 from flang-compiler/pmk-fix-912

Address complaints in bug flang-compiler/f18#912

Original-commit: flang-compiler/f18@66025c14e432ee3f2ceab9ad5176bd1c64cd147c
Reviewed-on: https://github.com/flang-compiler/f18/pull/917

[flang] Address complaints in bug flang-compiler/f18#912

Original-commit: flang-compiler/f18@829f5647d67131af57dcb84b0ed2d63a5324900d
Reviewed-on: https://github.com/flang-compiler/f18/pull/917

[flang] Merge pull request flang-compiler/f18#911 from flang-compiler/pmk-fold-trim

Fold TRIM and (new intrinsic) IS_CONTIGUOUS

Original-commit: flang-compiler/f18@2c6480a62dfb75884373a4fb8b00eadb2d09adf9
Reviewed-on: https://github.com/flang-compiler/f18/pull/911

[flang] Fold TRIM

Accept IS_CONTIGUOUS and fold it

test folding is_contiguous

Original-commit: flang-compiler/f18@c75a0791b14811477572c6a82a961071ed82c01e
Reviewed-on: https://github.com/flang-compiler/f18/pull/911

[flang] Merge pull request flang-compiler/f18#910 from flang-compiler/pmk-fold-more

Fold more intrinsic functions

Original-commit: flang-compiler/f18@4f737d4cf684fe84abaa3b44c70187f1f8b53072
Reviewed-on: https://github.com/flang-compiler/f18/pull/910

[flang] Implement folding of INDEX, SCAN, & VERIFY

Fold LEN_TRIM

Fold REPEAT

Fix gcc build warning

Fix two tests that had illegal pointers to coarrays

Original-commit: flang-compiler/f18@36769996fa9559b84dda59f3f9eceee9d2269e74
Reviewed-on: https://github.com/flang-compiler/f18/pull/910

[flang] Merge pull request flang-compiler/f18#907 from flang-compiler/pmk-enable-semantics

Enable semantic analysis by default

Original-commit: flang-compiler/f18@26ab8745110bcd8909024bb02720cc0f23b9ed9b
Reviewed-on: https://github.com/flang-compiler/f18/pull/907

[flang] enable semantic analysis by default

back out -Mnolargearray default temporarily

Fix C_F_POINTER(SHAPE=) argument check, it can be any kind of integer

Revert default result kind of SIZE() & al. to standard by default

Remove needless usage of -fdebug-semantics

Original-commit: flang-compiler/f18@57058a5b163eaa90c7e0f387ea4918f9efa8184c
Reviewed-on: https://github.com/flang-compiler/f18/pull/907

[flang] Merge pull request flang-compiler/f18#897 from kiranchandramohan/critical-3

Semantic Checks for critical construct

Original-commit: flang-compiler/f18@b17ab7f7bda573d33d6ca554ef1e46144148cf57
Reviewed-on: https://github.com/flang-compiler/f18/pull/897

[flang] Semantic checks for critical construct

The commit includes the following,
-> The name field in DoConcurrent*Enforce classes are not used anymore.
Removing the field and its collection and retrieval from
DoConcurrentBodyEnforce and its usage in DoConcurrentLabelEnforce.
-> DoConcurrentLabelEnforce is useful for checking that there
are no branches escaping from other constructs also. For enabling
use in other constructs (like critical) moving this to tools.h
and renaming it as LabelEnforce.
-> Checks for the constraints.
-> Tests for the constaints.

Original-commit: flang-compiler/f18@4b7a007ff3d4a3e519c85e960fc262bb382f3af4
Reviewed-on: https://github.com/flang-compiler/f18/pull/897

[flang] Merge pull request flang-compiler/f18#905 from flang-compiler/pmk-folding

Constant folding for ANINT, NINT, FLOOR, and CEILING intrinsic functions

Original-commit: flang-compiler/f18@ccb3ae517be766436e1cd7bcdcbb06d494fe614b
Reviewed-on: https://github.com/flang-compiler/f18/pull/905

[flang] Fold FLOOR, CEILING, NINT, and ANINT

Add GetUltimate() to ResolveAssociations(), fixing a UBOUND test case with use association

Fix folding of array-valued subscripts while I am in here

Original-commit: flang-compiler/f18@f663d4fef4b4c561f99e8126ff3f1d5b8e868c84
Reviewed-on: https://github.com/flang-compiler/f18/pull/905

[flang] Merge pull request flang-compiler/f18#906 from flang-compiler/pmk-fix

Another attempt to fix bug flang-compiler/f18#877

Original-commit: flang-compiler/f18@a4540324a32d60cd5dd82f765256b1e6d57d9504
Reviewed-on: https://github.com/flang-compiler/f18/pull/906

[flang] Another attempt to fix bug flang-compiler/f18#877

Original-commit: flang-compiler/f18@2ad2330cda59459ccfe63a62f1f944a6151f436c
Reviewed-on: https://github.com/flang-compiler/f18/pull/906

[flang] Merge pull request flang-compiler/f18#904 from flang-compiler/tsk-assignment3

Add analyzed form of pointer assignment

Original-commit: flang-compiler/f18@1f6cc18c7c1252026b2b673b138cefedd87b2a04
Reviewed-on: https://github.com/flang-compiler/f18/pull/904

[flang] Add analyzed form of pointer assignment

Add `typedAssignment` to `PointerAssignmentStmt` parse tree node and
extend `evaluate::Assignment` to include pointer assignment, including
analyzed bounds. Analyze pointer assignments and fill those in.
Emit them in unparsed output and parse tree dump when present.

Change assignment checking to use analyzed expressions and assignments
rather than calling AnalyzeExpr. Check bounds in pointer assignments
for impure function calls in FORALL context.

Add `Fold` convenience function to `ExpressionAnalyzer`.

Original-commit: flang-compiler/f18@140c983423d3f49fad66bc67317af3684e96ba1b
Reviewed-on: https://github.com/flang-compiler/f18/pull/904

[flang] Use common SymbolSet type

Replace `std::set<const Symbol *>` with `SymbolSet` from `symbol.h`.

Original-commit: flang-compiler/f18@78e3ff33cc21999a73a061daaf772ae5f14c8e02
Reviewed-on: https://github.com/flang-compiler/f18/pull/904
Tree-same-pre-rewrite: false

[flang] Fix type resolution in ConcurrentHeader

As it was implemented we weren't detecting non-constant kind parameters
in the integer-type-spec. The fix is just to walk the integer-type-spec
like was do any other one.

Also, there is not need for ResolveControlExpressions -- all it does is
walk that part of the parse tree.

Original-commit: flang-compiler/f18@8c0d890eb8852e460ea247c0c0e873dfe2da0200
Reviewed-on: https://github.com/flang-compiler/f18/pull/904
Tree-same-pre-rewrite: false

[flang] Move forall01 to ERROR_TESTS

That seems to be what was intended and it provides for better checking
of errors.

Original-commit: flang-compiler/f18@99376d77a07aa04173bd20dcc45d08b76cae4a73
Reviewed-on: https://github.com/flang-compiler/f18/pull/904
Tree-same-pre-rewrite: false

[flang] Merge pull request flang-compiler/f18#903 from flang-compiler/pmk-fix

Remove needless std::move() that breaks clang build

Original-commit: flang-compiler/f18@85f5cbecf16642b7be7416c1f6d83f85f8fbc9f2
Reviewed-on: https://github.com/flang-compiler/f18/pull/903

[flang] Remove needless std::move() that breaks clang build

Add the std::move() to where it should have been

Original-commit: flang-compiler/f18@54fe9b39a1551313da06e5c40ca2aa523288292d
Reviewed-on: https://github.com/flang-compiler/f18/pull/903

[flang] Merge pull request flang-compiler/f18#902 from flang-compiler/ps-do-call

Check for passing DO variables to OUT arguments in a CALL statement

Original-commit: flang-compiler/f18@27220661c3ac15c3135510b551458bc01a0a8ba5
Reviewed-on: https://github.com/flang-compiler/f18/pull/902

[flang] Check for passing DO variables to OUT arguments in a CALL statement

I added code to save the INTENT of a dummy argument in the checked expression
of the actual argument.  When processing a CallStmt, I then retrieve the
ProcedureRef, which contains a list of the checked ActualArguments.  I then
traverse this list looking for actual arguments that are active DO variable
that are being passed to dummy arguments whose INTENT is either OUT or INOUT.
For OUT dummies, I put out an error message and warn for INOUT dummies.

Original-commit: flang-compiler/f18@0ff1d264284c51a0142df0b785eb5f6409e8ad51
Reviewed-on: https://github.com/flang-compiler/f18/pull/902

[flang] Merge pull request flang-compiler/f18#901 from flang-compiler/pmk-operator-tbp

Fix type-bound user-defined operators

Original-commit: flang-compiler/f18@db63c87fb0ba8784c6b16cef80d6ae715900fa67
Reviewed-on: https://github.com/flang-compiler/f18/pull/901

[flang] Handle type-bound user-defined operators

Pre-review clean-up

Original-commit: flang-compiler/f18@1d4e85563aad3fc28c4decdc27f4c52af229c3d4
Reviewed-on: https://github.com/flang-compiler/f18/pull/901

[flang] Merge pull request flang-compiler/f18#899 from flang-compiler/deps

Add .mod file dependencies

Original-commit: flang-compiler/f18@74617f1d489ad211a81b91881ab8d4c199860fd8
Reviewed-on: https://github.com/flang-compiler/f18/pull/899

[flang] Add .mod file dependencies

Make compilation of other predefined module files depend on
__fortran_builtins.mod. Currently only iso_c_binding.f90 and
iso_fortran_env.f90 depend on it but others could in the future.

Create the .f18.mod files by copying from the .mod files so that
we don't have to worry about dependencies for those.

Original-commit: flang-compiler/f18@8209ad3d32909573e9ef72327ba61932f8967587
Reviewed-on: https://github.com/flang-compiler/f18/pull/899

[flang] Merge pull request flang-compiler/f18#900 from flang-compiler/pmk-fold

Partition fold.cc to reduce build-time memory requirements

Original-commit: flang-compiler/f18@372c82219a7b6cd355bf6d785b81daaf39790ac4
Reviewed-on: https://github.com/flang-compiler/f18/pull/900

[flang] Prep for review

Original-commit: flang-compiler/f18@25cb92e9903dfd97a8b5b8ecd2b60ce22ecd3659
Reviewed-on: https://github.com/flang-compiler/f18/pull/900

[flang] Put templates back into implementation header

Original-commit: flang-compiler/f18@89499243510d44d94ac47d41db34c0e6822801b0
Reviewed-on: https://github.com/flang-compiler/f18/pull/900
Tree-same-pre-rewrite: false

[flang] More restructuring

Original-commit: flang-compiler/f18@6e4aca113a7d744af8b2566a52e270d59743084e
Reviewed-on: https://github.com/flang-compiler/f18/pull/900
Tree-same-pre-rewrite: false

[flang] Break up fold.cc along per-type fault lines

Original-commit: flang-compiler/f18@8022c143d9283d670350e9d2d68b21325becf8c6
Reviewed-on: https://github.com/flang-compiler/f18/pull/900
Tree-same-pre-rewrite: false

[flang] Make SHAPE= argument to C_F_POINTER() sensitive to -Mlargearray

Original-commit: flang-compiler/f18@daaa74bbc85f0d1625d1aecd89a0b428209c5c4c
Reviewed-on: https://github.com/flang-compiler/f18/pull/900
Tree-same-pre-rewrite: false

[flang] Merge pull request flang-compiler/f18#898 from flang-compiler/pmk-patch

Patch build problem

Original-commit: flang-compiler/f18@07318b5c8936060d6f0602da5e555d951b6abd29
Reviewed-on: https://github.com/flang-compiler/f18/pull/898

[flang] Patch build problem

Original-commit: flang-compiler/f18@a66851210028d1cf31ba4875a2eb71eebb333a91
Reviewed-on: https://github.com/flang-compiler/f18/pull/898

[flang] Merge pull request flang-compiler/f18#896 from flang-compiler/pmk-c_f_pointer

C_F_POINTER

Original-commit: flang-compiler/f18@f4d48e852543a02ba19d8b9cce9fe18ee749d2d5
Reviewed-on: https://github.com/flang-compiler/f18/pull/896

[flang] C_F_POINTER

Emit INTRINSIC statements in module files

Argument checking utility

Complete error checking

Original-commit: flang-compiler/f18@9c6a88f0482c1f222b37e0cc548c822f80ad00e7
Reviewed-on: https://github.com/flang-compiler/f18/pull/896

[flang] Merge pull request flang-compiler/f18#893 from flang-compiler/pmk-fixes

Fix flang-compiler/f18#892 and a crash

Original-commit: flang-compiler/f18@86ae6e6cc85c46958c2446d754650026ba26ff86
Reviewed-on: https://github.com/flang-compiler/f18/pull/893

[flang] Fix test for assignment to host-associated object in PURE

Original-commit: flang-compiler/f18@019e61aa85ce55298d233dbb3af6399a8ce974b6
Reviewed-on: https://github.com/flang-compiler/f18/pull/893

[flang] The #! sequence must be at the start of the script file. (flang-compiler/f18#894)

Original-commit: flang-compiler/f18@b1ff232730778d6de62036711afb34fd3ded0bd6
Reviewed-on: https://github.com/flang-compiler/f18/pull/894

[flang] Merge pull request flang-compiler/f18#860 from flang-compiler/ps-do-redefine

Semantic checks to see if a DO variable is modified

Original-commit: flang-compiler/f18@6715b162fa234b8836e34b216886d4de80ca4568
Reviewed-on: https://github.com/flang-compiler/f18/pull/860

[flang] Semantic checks to see if a DO variable is modified

I added infrastructure to SemanticsContext to track active DO variables
and the source locations where they appear in DO statements.  I also
added code to semantics.[h,cc] to check to see if a DO variable is
already defined, and, if so, to emit an error message along with a
reference to the relevant DO construct.  I also added calls to several
places where variables are defined to determine if the definitions are
happening in the context of an active DO construct.

I have not yet added the checks for DO variables being redefined when passing
them as actual arguments to dummy arguments with INTENT(OUT) or INTENT(INOUT).
I wanted to get these changes merged first and catch up with the other changes
in master.

Original-commit: flang-compiler/f18@1bbfcca61b94dccfbbe943b511f846acc1c33997
Reviewed-on: https://github.com/flang-compiler/f18/pull/860

[flang] Merge pull request flang-compiler/f18#891 from flang-compiler/pmk-spec

Some fixes

Original-commit: flang-compiler/f18@e3ee4a658ad4236a6683e8cbec8c24345dab9805
Reviewed-on: https://github.com/flang-compiler/f18/pull/891

[flang] Fix off-by-one error in preprocessing expressions

Original-commit: flang-compiler/f18@4c08a4a1be9fb398a8fc7561da114dc9d2a3accc
Reviewed-on: https://github.com/flang-compiler/f18/pull/891

[flang] Merge pull request flang-compiler/f18#890 from flang-compiler/gak-format-fixes

Fix clang-format issues identified during relicensing

Original-commit: flang-compiler/f18@a04295dc36f8685447bd83dffdd037dc2e819f2e
Reviewed-on: https://github.com/flang-compiler/f18/pull/890

[flang] Fix clang-format issues identified during relicensing

While running clang-format during the relicensing, there were
a few files that showed minor format issues that could be cleaned
up. These changes address them.

Original-commit: flang-compiler/f18@b308f9e35a6d386b53ded90e84bbfac600f38867
Reviewed-on: https://github.com/flang-compiler/f18/pull/890

[flang] Merge pull request flang-compiler/f18#887 from flang-compiler/gak-relicense

Flang relicensing changes for LLVM Apache 2.0 license

Original-commit: flang-compiler/f18@e06be2faa64a52471b3cfb2829dc05888236aa68
Reviewed-on: https://github.com/flang-compiler/f18/pull/887

[flang] Flang relicensing changes for LLVM Apache 2.0 license

This changes the license information in many of the flang source files.
- Renamed LICENSE to LICENSE.txt.
- NVIDIA Copyright lines have been removed.
- Initial lines for files follow the LLVM coding convention (file name on the first line; Emacs mode information on the first line).
- License references have been replaced with the abridged LLVM text.
- License information was removed from the test files.
- No file header was placed on test files (these weren't in most LLVM test files).
- License information was added to documentation files where it was missing.

We did not add brief file summaries to the initial line.

See http://llvm.org/docs/DeveloperPolicy.html#new-llvm-project-license-framework
for a description of the new license.

See http://llvm.org/docs/CodingStandards.html#file-headers
for a description of the new LLVM standard file header.

Original-commit: flang-compiler/f18@add6cde7244b926ca457a1c74c21fea071b85329
Reviewed-on: https://github.com/flang-compiler/f18/pull/887

[flang] Merge pull request flang-compiler/f18#886 from kiranchandramohan/elemental

Mark ieee_get_flag and ieee_get_halting_mode as elemental

Original-commit: flang-compiler/f18@a694b62c6d464ef2fc17046497a0aa0a0b14a756
Reviewed-on: https://github.com/flang-compiler/f18/pull/886

[flang] Mark ieee_get_flag and ieee_get_halting_mode as elemental

Original-commit: flang-compiler/f18@d6237fa31112acc7bd864b9f732cb288014e6cf7
Reviewed-on: https://github.com/flang-compiler/f18/pull/886

[flang] Merge pull request flang-compiler/f18#885 from flang-compiler/pmk-fixes

Two small fixes

Original-commit: flang-compiler/f18@2d8a4815a338b3c21cc9882ebbb165fe1204ed93
Reviewed-on: https://github.com/flang-compiler/f18/pull/885