[flang] Analyze wrapped expressions

Original-commit: flang-compiler/f18@b34db5d38f03b11b85890696569a22d506a98736
Reviewed-on: https://github.com/flang-compiler/f18/pull/228

[flang] fix comments

Original-commit: flang-compiler/f18@a01eaaacc2af1caffeb0a788eecf3cb25f230c64
Reviewed-on: https://github.com/flang-compiler/f18/pull/228
Tree-same-pre-rewrite: false

[flang] Merge pull request flang-compiler/f18#226 from flang-compiler/pmk2

fix issue#224

Original-commit: flang-compiler/f18@cd6e4f0adaecde8d58e03c67542f9a9b6c3b68d2
Reviewed-on: https://github.com/flang-compiler/f18/pull/226

[flang] fix issue#224

Original-commit: flang-compiler/f18@c40e197c61c8192fe7932932390417c8b47f79c6
Reviewed-on: https://github.com/flang-compiler/f18/pull/226

[flang] Merge pull request flang-compiler/f18#225 from flang-compiler/pmk1

Roll up a bunch of changes

Original-commit: flang-compiler/f18@9ad19cd89298a3d4a4d468145b8a5dffec8b936d
Reviewed-on: https://github.com/flang-compiler/f18/pull/225

[flang] review comments

Original-commit: flang-compiler/f18@32c02cb668f17e31061c3f52c834e4029e410381
Reviewed-on: https://github.com/flang-compiler/f18/pull/225

[flang] bugfixing and review comments

Original-commit: flang-compiler/f18@6df4a52d6bb2575c3eb4726b633a0cf98da0d298
Reviewed-on: https://github.com/flang-compiler/f18/pull/225
Tree-same-pre-rewrite: false

[flang] bugfixing from regression testing

Original-commit: flang-compiler/f18@f1bcaa0292cb0eec2fdc10df347b78c2329a379e
Reviewed-on: https://github.com/flang-compiler/f18/pull/225
Tree-same-pre-rewrite: false

[flang] remove unused variable

Original-commit: flang-compiler/f18@64773cef2c1b31a72fb61c2cdc8dce7eeddefffe
Reviewed-on: https://github.com/flang-compiler/f18/pull/225
Tree-same-pre-rewrite: false

[flang] revamp Real::Read(), use it for mutual testing of ScaledDecimals

Original-commit: flang-compiler/f18@a2054bb9dfa3753f49ab7d35c842ed47b41fc374
Reviewed-on: https://github.com/flang-compiler/f18/pull/225
Tree-same-pre-rewrite: false

[flang] binary->decimal conversion for module files

Original-commit: flang-compiler/f18@6364799e7adda3b6b5280b0305d55a2bfa7eabe0
Reviewed-on: https://github.com/flang-compiler/f18/pull/225
Tree-same-pre-rewrite: false

[flang] save work in progress

Original-commit: flang-compiler/f18@98bac3d297af460ae80467f257f724cd7b041dbd
Reviewed-on: https://github.com/flang-compiler/f18/pull/225
Tree-same-pre-rewrite: false

[flang] Rename Dump() as AsFortran(), tweak output for use in .mod files

Original-commit: flang-compiler/f18@4e9dd16d6a84c728a86e187fe59500638ebbfe35
Reviewed-on: https://github.com/flang-compiler/f18/pull/225
Tree-same-pre-rewrite: false

[flang] fix warning

Original-commit: flang-compiler/f18@92003070de18bc7f4b78a8b00d72c324a554d523
Reviewed-on: https://github.com/flang-compiler/f18/pull/225
Tree-same-pre-rewrite: false

[flang] multi-byte character TODOs

Original-commit: flang-compiler/f18@3bd2d227dc4c6c3f6d721e95c8cd07075021f462
Reviewed-on: https://github.com/flang-compiler/f18/pull/225
Tree-same-pre-rewrite: false

[flang] more substring clean-up

Original-commit: flang-compiler/f18@e1c19ccd168f2dc3f9df9ab9328bdc6bbb61a5b4
Reviewed-on: https://github.com/flang-compiler/f18/pull/225
Tree-same-pre-rewrite: false

[flang] documentation

Original-commit: flang-compiler/f18@92f0c397f658a865ecab347b31773999f6503693
Reviewed-on: https://github.com/flang-compiler/f18/pull/225
Tree-same-pre-rewrite: false

[flang] documentation

Original-commit: flang-compiler/f18@9aba35a2582bbb8100a275d701e3013dfa478c45
Reviewed-on: https://github.com/flang-compiler/f18/pull/225
Tree-same-pre-rewrite: false

[flang] BaseObjects and static data placeholder

Original-commit: flang-compiler/f18@3ddfd5cadfafffe9c58cedd7a625cd071820c79c
Reviewed-on: https://github.com/flang-compiler/f18/pull/225
Tree-same-pre-rewrite: false

[flang] update pointer documentation

Original-commit: flang-compiler/f18@0f04468c000f23f606d8cf14348af7ee318fd298
Reviewed-on: https://github.com/flang-compiler/f18/pull/225
Tree-same-pre-rewrite: false

[flang] small tweaks

Original-commit: flang-compiler/f18@5bbd6c3c1995edf5ee909648e517ca3dde2560e0
Reviewed-on: https://github.com/flang-compiler/f18/pull/225
Tree-same-pre-rewrite: false

[flang] take literal substrings out of variable.h

Original-commit: flang-compiler/f18@a762b70bebc5428adec75b85801aef8ee88bcf42
Reviewed-on: https://github.com/flang-compiler/f18/pull/225
Tree-same-pre-rewrite: false

[flang] allow array constructors in all expressions

Original-commit: flang-compiler/f18@6dd5431cd9a0da203f098487a7d5db379c64b3ea
Reviewed-on: https://github.com/flang-compiler/f18/pull/225
Tree-same-pre-rewrite: false

[flang] represent array constructors

Original-commit: flang-compiler/f18@74ccff6b39972ada3d344ae8ee72d4c18842d35c
Reviewed-on: https://github.com/flang-compiler/f18/pull/225
Tree-same-pre-rewrite: false

[flang] Clean up Designator and GetSymbol()

Original-commit: flang-compiler/f18@61c0af323c13f7ad97521332603497d21638e2f9
Reviewed-on: https://github.com/flang-compiler/f18/pull/225
Tree-same-pre-rewrite: false

[flang] Make all Expr<> instances derived from ExpressionBase

Original-commit: flang-compiler/f18@f7d1a21532a51dc10aa7a8fd775e3404320986a6
Reviewed-on: https://github.com/flang-compiler/f18/pull/225
Tree-same-pre-rewrite: false

[flang] Address TODO: define IsAssumedRank predicate, use it

Original-commit: flang-compiler/f18@f75c3e0ccfc763644afc3b0fe37861e3a5adcdd9
Reviewed-on: https://github.com/flang-compiler/f18/pull/225
Tree-same-pre-rewrite: false

[flang] Merge pull request flang-compiler/f18#222 from flang-compiler/jpr0

C interoperability: Fixes CFI_CDESC_T macro and CFI_establish function

Original-commit: flang-compiler/f18@e104912ef1f146817b411162e8a657e504a8fc82
Reviewed-on: https://github.com/flang-compiler/f18/pull/222

[flang] Simplified C++ CFI_CDESC_T implem. Added local namespace around

Original-commit: flang-compiler/f18@456f5a09949701b74b02834668f161bbb5d68009
Reviewed-on: https://github.com/flang-compiler/f18/pull/222

[flang] Changed CFI_CDESC_T macro in C++. Cleaned related tests.

Original-commit: flang-compiler/f18@752f8eefa0cdf310afcdab50241885a644ea2fb4
Reviewed-on: https://github.com/flang-compiler/f18/pull/222
Tree-same-pre-rewrite: false

[flang] Fixed CFI_establish. Improved and renamed related test suit

Original-commit: flang-compiler/f18@b75d858e4f96c21da67a8c7ecc4d4bdbcc9c8498
Reviewed-on: https://github.com/flang-compiler/f18/pull/222
Tree-same-pre-rewrite: false

[flang] Fixed CFI_DESC_T macro. Started unit test for C interop

Original-commit: flang-compiler/f18@f29b80c7582f6b5f18ca26f6fd9466da56479664
Reviewed-on: https://github.com/flang-compiler/f18/pull/222
Tree-same-pre-rewrite: false

[flang] Merge pull request flang-compiler/f18#223 from flang-compiler/tsk5

Resolve expressions in symbols

Original-commit: flang-compiler/f18@6f253b5514740198bf732aa2e269e97de34d2888
Reviewed-on: https://github.com/flang-compiler/f18/pull/223

[flang] Address review comments

Change `const Symbol *` to `const Symbol &`.
Simplify expression for `Assumed()` and `Deferred()` in `ParamValue`.

Original-commit: flang-compiler/f18@b3e76706ca72b5d324c96bee4db8efae34e3135e
Reviewed-on: https://github.com/flang-compiler/f18/pull/223

[flang] Resolve expressions in symbols

Add `LazyExpr` class to represent expressions in the symbol table.
Initially they contain a pointer to an expression in the parse tree.
After name resolution is complete and symbols are filled in in the parse
tree, `LazyExpr`s are resolved to `evaluate::Expr<evaluate::SomeType>`.
This is done by `ResolveSymbolExprs()`.

Change `Bound` and `ParamValue` to save their value as a `LazyExpr`.
Change `ObjectEntityDetails` and `TypeParamDetails` to save the initial
value as a `LazyExpr`.

Eliminate `IntExpr` and `IntConst` classes, which were just place-holders.

Add `Clone()` to `ShapeSpec`, `Bound`, `LazyExpr`. Normally they should
be moved but in `ObjectEntityDetails::set_shape()` we need to make copies.

Save type parameter values in `derivedTypeSpec_`. `typeParamValue_` is
not needed.

Write out initial values, type parameter values, and bounds to .mod files.

Evaluate parameter values in expressions.

Make some errors non-fatal so that tests can continue to pass.

Original-commit: flang-compiler/f18@b90cadfc53c6e31c5f289eadc382bc3908811b86
Reviewed-on: https://github.com/flang-compiler/f18/pull/223
Tree-same-pre-rewrite: false

[flang] Remove include of symbol.h from variable.h

This include will lead to circularities when semantics/type.h needs
include evaluate/expression.h. There will probably be a different
long-term solution.

Original-commit: flang-compiler/f18@c7fa8150368f7d3a9bb200fc5502ece0a99a8631
Reviewed-on: https://github.com/flang-compiler/f18/pull/223
Tree-same-pre-rewrite: false

[flang] Use forward declarations to reduce includes

Original-commit: flang-compiler/f18@384af49342fbf767d63fe2a6eb8fa8a9a790f91d
Reviewed-on: https://github.com/flang-compiler/f18/pull/223
Tree-same-pre-rewrite: false

[flang] Move Details rather than copying

We don't need to copy the various Details classes. We will be adding
expressions to some of them (e.g. for bounds or initial values) and they
should generally be moved as well.

In check-do-concurrent.cc, put pointers to Symbols in the symbol
collections rather than copies.

Original-commit: flang-compiler/f18@cdedfc9b3ee554bf6b1f94adbbb92f8a515e1cbd
Reviewed-on: https://github.com/flang-compiler/f18/pull/223
Tree-same-pre-rewrite: false

[flang] Merge pull request flang-compiler/f18#221 from flang-compiler/pmk0

Document various pointer-like abstractions

Original-commit: flang-compiler/f18@11b472741de3465a3ecd915276b3f6517baa0bbf
Reviewed-on: https://github.com/flang-compiler/f18/pull/221

[flang] address review comment

Original-commit: flang-compiler/f18@b5da6b44928d08befaf8a1a1bd6b88cda59e7b21
Reviewed-on: https://github.com/flang-compiler/f18/pull/221

[flang] document pointer variations

Original-commit: flang-compiler/f18@4c718f56646b8522584dd2d3c23defcaf0c82c25
Reviewed-on: https://github.com/flang-compiler/f18/pull/221
Tree-same-pre-rewrite: false

[flang] document pointer variations

Original-commit: flang-compiler/f18@70c55eb1eb75e73165a62821f2666c31270235de
Reviewed-on: https://github.com/flang-compiler/f18/pull/221
Tree-same-pre-rewrite: false

[flang] Merge pull request flang-compiler/f18#219 from flang-compiler/pmk0

A refactoring of folding

Original-commit: flang-compiler/f18@a056aaabbbb78e64432393467404d84e253a9ece
Reviewed-on: https://github.com/flang-compiler/f18/pull/219

[flang] readability improvement from Tim

Original-commit: flang-compiler/f18@14179ead7c3aa5a3b26c14b636d78f9f12523529
Reviewed-on: https://github.com/flang-compiler/f18/pull/219

[flang] Back out needless macro change that led to clang-format grief

Original-commit: flang-compiler/f18@5a6e55df1163348b3800e088b4dd0dacd01c1973
Reviewed-on: https://github.com/flang-compiler/f18/pull/219
Tree-same-pre-rewrite: false

[flang] clean up comments, put out for review

Original-commit: flang-compiler/f18@26a3221fc40ca0c3047c11b731426d270e072880
Reviewed-on: https://github.com/flang-compiler/f18/pull/219
Tree-same-pre-rewrite: false

[flang] prepare for merge

Original-commit: flang-compiler/f18@5d2490b1c8af0870ad1d399fce7c500f5d07e6be
Reviewed-on: https://github.com/flang-compiler/f18/pull/219
Tree-same-pre-rewrite: false

[flang] Complete refactor of Fold() - checkpoint

Original-commit: flang-compiler/f18@5061171268ef6a4552aa365642d3f5ad120f871f
Reviewed-on: https://github.com/flang-compiler/f18/pull/219
Tree-same-pre-rewrite: false

[flang] merge

Original-commit: flang-compiler/f18@d0cd9544f54e8fc841bb16d00841b6ace2f548ad
Reviewed-on: https://github.com/flang-compiler/f18/pull/219
Tree-same-pre-rewrite: false

[flang] complete new Fold

Original-commit: flang-compiler/f18@4d1726778f193c8813a8cc63fad0b46faf8d2fec
Reviewed-on: https://github.com/flang-compiler/f18/pull/219
Tree-same-pre-rewrite: false

[flang] dodge gcc 7.2.0 build hiccup

Original-commit: flang-compiler/f18@4a9e862d74f134241a0e1a9cd3fc3562041b3f74
Reviewed-on: https://github.com/flang-compiler/f18/pull/219
Tree-same-pre-rewrite: false

[flang] merge with master

Original-commit: flang-compiler/f18@53f15da06aab657e94ecea342ef77a07e5e38a27
Reviewed-on: https://github.com/flang-compiler/f18/pull/219
Tree-same-pre-rewrite: false

[flang] new refactored Fold

Original-commit: flang-compiler/f18@061868fd857b255f8c1b49f3cb300666f5e1edda
Reviewed-on: https://github.com/flang-compiler/f18/pull/219
Tree-same-pre-rewrite: false

[flang] start refactoring of Constant and Fold

Original-commit: flang-compiler/f18@53f7174c3dddd743146e1cff9ffcde0db4c89b6b
Reviewed-on: https://github.com/flang-compiler/f18/pull/219
Tree-same-pre-rewrite: false

[flang] Refactor some lib/evaluate headers for sanity

Original-commit: flang-compiler/f18@9530378c39d0206a93eafd7d19b7f52c82e8f904
Reviewed-on: https://github.com/flang-compiler/f18/pull/219
Tree-same-pre-rewrite: false

[flang] rearrange arguments into dummy argument order

Original-commit: flang-compiler/f18@3bab0f55de1b66d38bd15a841459c3a36cf29d30
Reviewed-on: https://github.com/flang-compiler/f18/pull/219
Tree-same-pre-rewrite: false

[flang] refactor a bit, and rearrange actual arguments into dummy order on intrinsic calls

Original-commit: flang-compiler/f18@1f50ace68b00a7db4b75ebce5616032501e48457
Reviewed-on: https://github.com/flang-compiler/f18/pull/219
Tree-same-pre-rewrite: false

[flang] Use Attrs for intrinsic results rather than flags.

Original-commit: flang-compiler/f18@14c9199718138dee4b8cf1e673935f794c366ac1
Reviewed-on: https://github.com/flang-compiler/f18/pull/219
Tree-same-pre-rewrite: false

[flang] Merge pull request flang-compiler/f18#218 from flang-compiler/tsk2

More name resolution for submodules

Original-commit: flang-compiler/f18@f574667aaad4fe1135d3427df6a21b8b0adcbb12
Reviewed-on: https://github.com/flang-compiler/f18/pull/218

[flang] Address review comments

Original-commit: flang-compiler/f18@c3597a1984811900ef8da55f15374417373f5492
Reviewed-on: https://github.com/flang-compiler/f18/pull/218

[flang] Process SeparateModuleSubprogram during name resolution

When a SeparateModuleSubprogram is encountered, check that there is a
corresponding declaration in the current module/submodule or an ancestor.
When it's the current program unit, special handling is required to
avoid trying to declare it again.

Module subprograms with the `MODULE` prefix are handled similarly.
The `hasModulePrefix` flag is passed in to `BeginSubprogram` to
distinguish this case.

Extract common part of `Post(SubroutineStmt)` and `Post(FunctionStmt)` into
`PostSubprogramStmt`. Add code there to ensure that separate module
procedures do not have `EXTERNAL` set. This requires a fix to `ModFileWriter`
to correctly decide when a subprogram is declared in an interface block.

Extract `WalkSubprogramPart` into a separate function. It walks the
internal or module subprograms collecting their names. It is needed to
handle separate module subprograms.

Original-commit: flang-compiler/f18@339b65f2517cebc115eba4ce91c1d8b304802939
Reviewed-on: https://github.com/flang-compiler/f18/pull/218
Tree-same-pre-rewrite: false

[flang] Reformat and add comment

Original-commit: flang-compiler/f18@524f224adc98472ce33afa38dc9513b4b26f1f93
Reviewed-on: https://github.com/flang-compiler/f18/pull/218
Tree-same-pre-rewrite: false

[flang] Fix failure to resolve submodule name.

If we have `SUBMODULE(m:s1) s2` and `s1` is already in memory (i.e. does
not need to be read from the `m-s1.mod` file), we still need to record
the fact that the name is a reference to that module symbol.

Original-commit: flang-compiler/f18@4bb42ed6a4f7da9772903bd411146b989aff8367
Reviewed-on: https://github.com/flang-compiler/f18/pull/218
Tree-same-pre-rewrite: false

[flang] Fix bug with popping scopes.

Processing a SUBMODULE can cause any number of scopes to be pushed on
the scope stack. We don't know how many to pop at the end, so add
`ClearScopes()` to reset the scope stack to its original state.

Original-commit: flang-compiler/f18@0be4cebd66b81281bfa07016eb2b1393cf271e69
Reviewed-on: https://github.com/flang-compiler/f18/pull/218
Tree-same-pre-rewrite: false

[flang] Merge pull request flang-compiler/f18#217 from flang-compiler/namespace-comment-removal

Format Style Change: Removed namespace comments after closing brace

Original-commit: flang-compiler/f18@dcca71aae29def7d7db6a1a787a273a6fb393b23
Reviewed-on: https://github.com/flang-compiler/f18/pull/217

[flang] Changed .clang-format so that it will not add a comment after the closing brace of each namespace. Removed all such previous comments from all .cc and .h files

Original-commit: flang-compiler/f18@aa7f55e15f78909ba8401f85e023ee4c3eaa923f
Reviewed-on: https://github.com/flang-compiler/f18/pull/217

[flang] Merge pull request flang-compiler/f18#216 from flang-compiler/tsk4

Fix bug in rewriting function reference

Original-commit: flang-compiler/f18@22f25eadc7e0849bba3601a53ac331903ef5c203
Reviewed-on: https://github.com/flang-compiler/f18/pull/216

[flang] Fix bug in rewriting function reference

`a(i)` is parsed as a function reference and needs to be converted to an
array element reference when `a` is an object entity. That determination
was wrong if the symbol for `a` was a symbol representing host-association
or use-association. In that case we need to get to the original symbol
by calling `GetUltimate()` on the symbol.

This was causing symbol09.f90 to get a compilation error because an
array element reference looked like a call to a non-pure function, which
is prohibited inside a DO CONCURRENT.

Original-commit: flang-compiler/f18@221e6c52c5460edfbec28904ebe1774ff787fc45
Reviewed-on: https://github.com/flang-compiler/f18/pull/216

[flang] Merge pull request flang-compiler/f18#196 from flang-compiler/eas6

DO CONCURRENT semantic constraints checking

Original-commit: flang-compiler/f18@304c6f65482fc04d460abed7b8341dbc9df4fb53
Reviewed-on: https://github.com/flang-compiler/f18/pull/196

[flang] Fix conflicts
Fix more rotten bits
Fix the tests to reflect merges

Original-commit: flang-compiler/f18@b9a1a8b809e579819e8a7f67699b1897f3e600d4
Reviewed-on: https://github.com/flang-compiler/f18/pull/196

[flang] add openmp simd test

Original-commit: flang-compiler/f18@c31bb0d1440198491c80b29b4ba3645ef9c2425e
Reviewed-on: https://github.com/flang-compiler/f18/pull/196
Tree-same-pre-rewrite: false

[flang] minor changes
Move functions out of FindDoConcurrentLoops
tweak comments

Original-commit: flang-compiler/f18@713c7e8f9ea292b4660ab989eb87ded4f1389cc1
Reviewed-on: https://github.com/flang-compiler/f18/pull/196
Tree-same-pre-rewrite: false

[flang] add C1120, C1122 and placehokders for C1006, C1121, and C1123
add a new test for C1120
Fix new test's CHECKs
More contraints hacking

Original-commit: flang-compiler/f18@197e5fd75083d0ca9773b2f75df54fba0ada9dc8
Reviewed-on: https://github.com/flang-compiler/f18/pull/196
Tree-same-pre-rewrite: false

[flang] Add OpenMP annotated loops example as a test

Original-commit: flang-compiler/f18@d0177b8cc6126e567a646bee3ee663702f50e0f0
Reviewed-on: https://github.com/flang-compiler/f18/pull/196
Tree-same-pre-rewrite: false

[flang] enable the IEEE_GET_FLAG test

Original-commit: flang-compiler/f18@3f95b388a1c6b8bd8e25da6c7f4c0c11a407e550
Reviewed-on: https://github.com/flang-compiler/f18/pull/196
Tree-same-pre-rewrite: false

[flang] More review changes

Original-commit: flang-compiler/f18@48f34e66c8e3d47eec59bc677bc4885d19599dcf
Reviewed-on: https://github.com/flang-compiler/f18/pull/196
Tree-same-pre-rewrite: false

[flang] Global replace identifier names.

Original-commit: flang-compiler/f18@93303cd50de3a150802ac61f249e19b9965512c6
Reviewed-on: https://github.com/flang-compiler/f18/pull/196
Tree-same-pre-rewrite: false

[flang] Incorperate review comments

Original-commit: flang-compiler/f18@33ff57e3208a5637a28917af7413dce8c00e6442
Reviewed-on: https://github.com/flang-compiler/f18/pull/196
Tree-same-pre-rewrite: false

[flang] Add more constraint checking for DO CONCURRENT.
Add some more tests.

Original-commit: flang-compiler/f18@e65f755fe1ee4efea8e95713d03bad6842236ff4
Reviewed-on: https://github.com/flang-compiler/f18/pull/196
Tree-same-pre-rewrite: false

[flang] add another resolve-label test for misplaced end do statement.

Original-commit: flang-compiler/f18@17fa8c1ebf399219febfec659de39a5b558e4b6b
Reviewed-on: https://github.com/flang-compiler/f18/pull/196
Tree-same-pre-rewrite: false

[flang] Cleanup some cruft and tweaks per review comments.
Added a negative test, to check that semantics are not applied bogusly
to loops that are not DO CONCURRENT.

Original-commit: flang-compiler/f18@d8de45e994de0ff1c4977ded82b1f9918ff83e52
Reviewed-on: https://github.com/flang-compiler/f18/pull/196
Tree-same-pre-rewrite: false

[flang] DO CONCURRENT semantic constraints checking
Add tests for DO CONCURRENT

Original-commit: flang-compiler/f18@0b40fe1ce4fab86ce08fd89f71f9bb01f0eb7ffa
Reviewed-on: https://github.com/flang-compiler/f18/pull/196
Tree-same-pre-rewrite: false

[flang] Merge pull request flang-compiler/f18#185 from flang-compiler/eas5

Improved error messages:

Original-commit: flang-compiler/f18@f11ceaa7c9df03fe5ad8cd68e5ebb9b5e1853595
Reviewed-on: https://github.com/flang-compiler/f18/pull/185

[flang] rename sayLabel SayLabel

Original-commit: flang-compiler/f18@040af06134945d841331ee21385f7c1a1e2b6803
Reviewed-on: https://github.com/flang-compiler/f18/pull/185

[flang] Tweak the error messages to not use "here" like gcc does.

Original-commit: flang-compiler/f18@cb5da3d4e42a0e62493e5db9a1c33813956f04bf
Reviewed-on: https://github.com/flang-compiler/f18/pull/185
Tree-same-pre-rewrite: false

[flang] Improved error messages:
Update the tests to reflect new message
Improved error messages to show both source and destination of mismatches.

Use CharBlock::size.

Original-commit: flang-compiler/f18@bf79d77d3c0a6982d7e54841d4856c4cf3f8182b
Reviewed-on: https://github.com/flang-compiler/f18/pull/185
Tree-same-pre-rewrite: false

[flang] Merge pull request flang-compiler/f18#215 from flang-compiler/tsk2

Refactoring: add SemanticsContext class

Original-commit: flang-compiler/f18@99b6ac0ddc4304d9e900c9acf7c31ef607334528
Reviewed-on: https://github.com/flang-compiler/f18/pull/215

[flang] Rename PushLocation() to SetLocation().

Original-commit: flang-compiler/f18@1b5593c12b23442b5f9fb2ea0a600f1efd5b168d
Reviewed-on: https://github.com/flang-compiler/f18/pull/215

[flang] Add FoldingContext to SemanticsContext

FoldingContext is now part of SemanticsContext. It is created at the
beginning with a default-constructed CharBlock as the location in its
ContextualMessages.

Add PushLocation() to ContextualMessages to remember the previous source
location and set a new one. The old one is restored when the returned
object goes out of scope.

SemanticsContext is now the only state passed in to class ExprAnalyzer,
class Mutator, AnalyzeExpr(), AnalyzeExpressions().

Add Say() convenience functions for reporting errors to ExprAnalyzer.

Original-commit: flang-compiler/f18@70c499ffc4a1f09a680d636f59938f42ec451ef3
Reviewed-on: https://github.com/flang-compiler/f18/pull/215
Tree-same-pre-rewrite: false

[flang] Refactoring: add SemanticsContext class

The new SemanticsContext holds the state of semantics whose lifetime
spans all of the compilations. It contains the scope tree (and so all
symbols), the intrinsics table, messages, and the state of options that
affect semantics (default kinds, search directories, etc.)

Original-commit: flang-compiler/f18@f04ceab81f383fa51d76e643066be251d6433ef2
Reviewed-on: https://github.com/flang-compiler/f18/pull/215
Tree-same-pre-rewrite: false

[flang] Merge pull request flang-compiler/f18#214 from flang-compiler/tsk2

More name resolution for construct entities

Original-commit: flang-compiler/f18@848b067be81a6267c04b2b1fb9ab3163f85141c0
Reviewed-on: https://github.com/flang-compiler/f18/pull/214

[flang] More name resolution for construct entities

Push a new scope for constructs and statements that require one
(DataStmt, DO CONCURRENT, ForallConstruct, ForallStmt -- there are more
to do). Currently we use the Block kind of scope because there is no
difference. Perhaps that kind should be renamed to Construct, though it
does apply to statements as well as constructs.

Add DeclareConstructEntity to create a construct or statement entity.
When the type is not specified it can come from the type of a symbol in
the enclosing scope with the same name. Change DeclareObjectEntity et al.
to return the symbol declared, for the benefit of DeclareConstructEntity.

Use DeclareConstructEntity for DO CONCURRENT index-name, LOCAL, and
LOCAL_INIT variables and the data-i-do-variable in DataImpliedDo

Names in SHARED locality spec need special handling: create a new kinds
of symbol with HostAssocDetails to represent the host-association of the
shared variables within the construct scope. That symbol gets the
LocalityShared flag without affecting the symbol in the outer scope.
HostAssoc symbols may be useful in other contexts, e.g. up-level
references to local variables.

Add parser::DoConstruct::IsDoConcurrent() because DO CONCURRENT loops
introduce a construct scope while other DO loops do not.

Move CanonicalizeDo to before name resolution so that name resolution
doesn't have to deal with labeled DO CONCURRENT loops.

Allow for type of index name to be specified in ConcurrentHeader.

Resolve the derived type name in an AllocateStmt, StructureConstructor

Original-commit: flang-compiler/f18@bc7b9891367f3174c9b5018ce5636a36a5a76c1c
Reviewed-on: https://github.com/flang-compiler/f18/pull/214

[flang] Simplify unparse-with-symbols.cc

Change it so that the first time a symbol is referenced, its full
definition is emitted, prefixed by "DEF:", and subsequent references
are prefixed with "REF:".

This doesn't give exactly the same results as before but it is
sufficient for testing and is simpler and easier to maintain.
The expected results need to be tweaked accordingly.

Original-commit: flang-compiler/f18@27b5d082a80f5e98b1e85a503518e7aa8c806af7
Reviewed-on: https://github.com/flang-compiler/f18/pull/214
Tree-same-pre-rewrite: false

[flang] Merge pull request flang-compiler/f18#213 from flang-compiler/pmk1

Fully parameterize default kinds of intrinsic types

Original-commit: flang-compiler/f18@f9da6f129ac6b547bb6e0019c7d2e177ce455f37
Reviewed-on: https://github.com/flang-compiler/f18/pull/213

[flang] Add -i8, -r8, &c. options to f18 development driver

Original-commit: flang-compiler/f18@ff7f338126562ce539879a59d3da5707c76ae11a
Reviewed-on: https://github.com/flang-compiler/f18/pull/213

[flang] Eliminate DefaultInteger

Original-commit: flang-compiler/f18@1760b9ccc5d8c6b56e2e85f05a00e90edbb4771b
Reviewed-on: https://github.com/flang-compiler/f18/pull/213
Tree-same-pre-rewrite: false

[flang] Eliminating old default type declarations

Original-commit: flang-compiler/f18@10e4a3385a8e36f535c57284b328483876ec398d
Reviewed-on: https://github.com/flang-compiler/f18/pull/213
Tree-same-pre-rewrite: false

[flang] Extract IntrinsicTypeDefaultKinds, move it into semantics

Original-commit: flang-compiler/f18@dd819b4727219010b30dcfc63e2bf0a894a0a7c9
Reviewed-on: https://github.com/flang-compiler/f18/pull/213
Tree-same-pre-rewrite: false

[flang] Merge pull request flang-compiler/f18#212 from flang-compiler/pmk0

Intrinsic function tables

Original-commit: flang-compiler/f18@795f790e93fd937decfab6d51eaa0f68a4f3cba1
Reviewed-on: https://github.com/flang-compiler/f18/pull/212

[flang] review comments

Original-commit: flang-compiler/f18@daaf080dbcc3c6a051aa9444cd141077890b0472
Reviewed-on: https://github.com/flang-compiler/f18/pull/212