[flang] Skip `D` when including D debug line

When including debug lines as code, the `D` should be considered as
a white space. Currently an error was raised about bad labels because
it the `D` rema

[flang] Skip `D` when including D debug line

When including debug lines as code, the `D` should be considered as
a white space. Currently an error was raised about bad labels because
it the `D` remained a `D` when considering the source line as code.

Differential Revision: https://reviews.llvm.org/D122711

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[flang] Distinguish usage and portability warning messages

Using recently established message severity codes, upgrade
non-fatal messages to usage and portability warnings as
appropriate.

Differenti

[flang] Distinguish usage and portability warning messages

Using recently established message severity codes, upgrade
non-fatal messages to usage and portability warnings as
appropriate.

Differential Revision: https://reviews.llvm.org/D121246

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[flang] Catch mismatched parentheses in prescanner

Source lines with mismatched parentheses are hard cases for error
recovery in parsing, and the best error message (viz.,
"here's an unmatched paren

[flang] Catch mismatched parentheses in prescanner

Source lines with mismatched parentheses are hard cases for error
recovery in parsing, and the best error message (viz.,
"here's an unmatched parenthesis") can be emitted from the
prescanner.

Differential Revision: https://reviews.llvm.org/D111254#3046173

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[flang] Fix build

An unused variable declaration from a recent change is eliciting
a fatal warning; remove it.

[flang] Enforce fixed form rules about END continuation

From subclause 6.3.3.5: a program unit END statement cannot be
continued in fixed form, and other statements cannot have initial
lines that lo

[flang] Enforce fixed form rules about END continuation

From subclause 6.3.3.5: a program unit END statement cannot be
continued in fixed form, and other statements cannot have initial
lines that look like program unit END statements. I think this
is to avoid violating assumptions that are important to legacy
compilers' statement classification routines.

Differential Revision: https://reviews.llvm.org/D109933

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[flang] NFC: change non-nullable pointer arguments to references

Ticking off a Parser TODO: Preprocessor::Directive()'s Prescanner
argument should be a reference, not a pointer.

Differential Revisi

[flang] NFC: change non-nullable pointer arguments to references

Ticking off a Parser TODO: Preprocessor::Directive()'s Prescanner
argument should be a reference, not a pointer.

Differential Revision: https://reviews.llvm.org/D109094

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[flang] Search for #include "file" in right directory (take 2)

Make the #include "file" preprocessing directive begin its
search in the same directory as the file containing the directive,
as other

[flang] Search for #include "file" in right directory (take 2)

Make the #include "file" preprocessing directive begin its
search in the same directory as the file containing the directive,
as other preprocessors and our Fortran INCLUDE statement do.

Avoid current working directory for all source files except the original.

Resolve tests.

Differential Revision: https://reviews.llvm.org/D95481

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Revert "[flang] Search for #include "file" in right directory"

This reverts commit d987b61b1dce9948801ac37704477e7c257100b1.

As pointed out in https://reviews.llvm.org/D95388, the reverted commit
c

Revert "[flang] Search for #include "file" in right directory"

This reverts commit d987b61b1dce9948801ac37704477e7c257100b1.

As pointed out in https://reviews.llvm.org/D95388, the reverted commit
causes build failures in the following Flang buildbots:
* http://lab.llvm.org:8011/#/builders/32/builds/2642
* http://lab.llvm.org:8011/#/builders/33/builds/2131
* http://lab.llvm.org:8011/#/builders/135/builds/1473
* http://lab.llvm.org:8011/#/builders/66/builds/1559
* http://lab.llvm.org:8011/#/builders/134/builds/1409
* http://lab.llvm.org:8011/#/builders/132/builds/1817
I'm guessing that the patch was only tested with
`FLANG_BUILD_NEW_DRIVER=Off` (i.e. the default). The builders listed
above set `FLANG_BUILD_NEW_DRIVER` to `On`.

Although fixing the build is relatively easy, the reverted patch
modifies the behaviour of the frontend, which breaks driver tests. In
particular, in https://reviews.llvm.org/D93453 support for `-I` was
added that depends on the current behaviour. The reverted patch
changes that behaviour. Either the tests have to be updated or the
change fine-tuned.

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[flang] Search for #include "file" in right directory

Make the #include "file" preprocessing directive begin its
search in the same directory as the file containing the directive,
as other preproces

[flang] Search for #include "file" in right directory

Make the #include "file" preprocessing directive begin its
search in the same directory as the file containing the directive,
as other preprocessors and our Fortran INCLUDE statement do.

Avoid current working directory for all source files after the original.

Differential Revision: https://reviews.llvm.org/D95388

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[flang] Rework preprocessing of stringification

Hew more closely to the C17 standard; perform macro replacement
of arguments to function-like macros unless they're being stringified
or pasted. Test

[flang] Rework preprocessing of stringification

Hew more closely to the C17 standard; perform macro replacement
of arguments to function-like macros unless they're being stringified
or pasted. Test with a model "assert" macro idiom that exposed
the problem.

Differential Revision: https://reviews.llvm.org/D87650

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[flang] More clean-up of CookedSource API

The std::string holding the content of a CookedSource no longer
needs to be exposed in its API after the recent work that allows
the parsing context to hold

[flang] More clean-up of CookedSource API

The std::string holding the content of a CookedSource no longer
needs to be exposed in its API after the recent work that allows
the parsing context to hold multiple instances of a CookedSource.
So clean the API. These changes were extracted from some work in
progress that was made easier by the API changes.

Differential Revision: https://reviews.llvm.org/D87635

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[flang] Support multiple CookedSource instances

These are owned by an instance of a new class AllCookedSources.

This removes the need for a Scope to own a string containing
a module's cooked source

[flang] Support multiple CookedSource instances

These are owned by an instance of a new class AllCookedSources.

This removes the need for a Scope to own a string containing
a module's cooked source stream, and will enable errors to be
emitted when parsing module files in the future.

Differential Revision: https://reviews.llvm.org/D86891

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[flang] Improve error handling for bad characters in source

When an illegal character appears in Fortran source (after
preprocessing), catch and report it in the prescanning phase
rather than leavin

[flang] Improve error handling for bad characters in source

When an illegal character appears in Fortran source (after
preprocessing), catch and report it in the prescanning phase
rather than leaving it for the parser to cope with.

Differential Revision: https://reviews.llvm.org/D86553

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[flang] Don't completely left-justify fixed-form tokenization

If the label field is empty, and macro replacement occurs,
the rescanned text might be misclassified as a comment card
if it happens to

[flang] Don't completely left-justify fixed-form tokenization

If the label field is empty, and macro replacement occurs,
the rescanned text might be misclassified as a comment card
if it happens to begin with a C or a D. Insert a leading
space into these otherwise empty label fields.

Fixes https://bugs.llvm.org/show_bug.cgi?id=47173

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[flang] Fix edge case with Hollerith

To prevent mistokenization of CHARACTER*2HXY as a Hollerith
literal constant while allowing it in DATA A/2*2HXY/, there's
a little state that tracks whether a /

[flang] Fix edge case with Hollerith

To prevent mistokenization of CHARACTER*2HXY as a Hollerith
literal constant while allowing it in DATA A/2*2HXY/, there's
a little state that tracks whether a / has been seen earlier
in the same statement. But it was being reset on each line,
not statement, so Hollerith in a DATA statement continuation
line was incorrectly tokenized. Fixed.

Differential Revision: https://reviews.llvm.org/D85571

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[flang] Make preprocessing behavior tests runnable as regression tests

And fix a minor bug exposed by doing so.

Differential Revision: https://reviews.llvm.org/D85164

[flang] Fix source line continuation in potential macro calls (bugzilla 46768)

The prescanner looks for implicit continuation lines when
there are unclosed parentheses at the end of a line, so that

[flang] Fix source line continuation in potential macro calls (bugzilla 46768)

The prescanner looks for implicit continuation lines when
there are unclosed parentheses at the end of a line, so that
source preprocessing macro references with arguments that span
lines are recognized. The condition that determines this
implicit continuation has been put into a predicate member
function and corrected to apply only when the following line
is source (not a preprocessing directive, comment, &c.).

Fixes bugzilla #46768.

Reviewed By: sscalpone

Differential Revision: https://reviews.llvm.org/D84280

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[flang] Check for misplaced labels

In fixed form source, complain when a label digit appears
outside the label field & when a non-digit appears in the label
field.

Reviewed By: sscalpone

Different

[flang] Check for misplaced labels

In fixed form source, complain when a label digit appears
outside the label field & when a non-digit appears in the label
field.

Reviewed By: sscalpone

Differential Revision: https://reviews.llvm.org/D84283

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[flang] Fix line continuation after bare labels (fm200.f)

Fixed-form line continuation was not working when the
preceding line was a bare label.

Reviewed By: tskeith

Differential Revision: https:/

[flang] Fix line continuation after bare labels (fm200.f)

Fixed-form line continuation was not working when the
preceding line was a bare label.

Reviewed By: tskeith

Differential Revision: https://reviews.llvm.org/D82687

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[flang] Reformat with latest clang-format and .clang-format

Original-commit: flang-compiler/f18@9fe84f45d7fd685051004678d6b5775dcc4c6f8f
Reviewed-on: https://github.com/flang-compiler/f18/pull/1094

[flang] Replace manual mmap with llvm::MemoryBuffer

The previous code had handling for cases when too many file descriptors may be
opened; this is not necessary with MemoryBuffer as the file descrip

[flang] Replace manual mmap with llvm::MemoryBuffer

The previous code had handling for cases when too many file descriptors may be
opened; this is not necessary with MemoryBuffer as the file descriptors are
closed after the mapping occurs. MemoryBuffer also internally handles the case
where a file is small and therefore an mmap is bad for performance; such files
are simply copied to memory after being opened.

Many places elsewhere in the code assume that the buffer is not empty, and the
old file opening code handles this by replacing an empty file with a buffer
containing a single newline. That behavior is now kept in the new MemoryBuffer
based code.

Original-commit: flang-compiler/f18@d34df8435127d847867e2c0bb157def9f20f4202
Reviewed-on: https://github.com/flang-compiler/f18/pull/1032

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[flang] [LLVMify F18] Replace the use std::ostream with LLVM streams llvm::ostream

This patch replaces the occurrence of std::ostream by llvm::raw_ostream.
In LLVM Coding Standards[1] "All new code

[flang] [LLVMify F18] Replace the use std::ostream with LLVM streams llvm::ostream

This patch replaces the occurrence of std::ostream by llvm::raw_ostream.
In LLVM Coding Standards[1] "All new code should use raw_ostream
instead of ostream".[1]

As a consequence, this patch also replaces the use of:
std::stringstream by llvm::raw_string_ostream or llvm::raw_ostream*
std::ofstream by llvm::raw_fd_ostream
std::endl by '\n' and flush()[2]
std::cout by llvm::outs() and
std::cerr by llvm::errs()

It also replaces std::strerro by llvm::sys::StrError** , but NOT in Fortran
runtime libraries

*std::stringstream were replaced by llvm::raw_ostream in all methods that
used std::stringstream as a parameter. Moreover, it removes the pointers to
these streams.

[1]https://llvm.org/docs/CodingStandards.html
[2]https://releases.llvm.org/2.5/docs/CodingStandards.html#ll_avoidendl

Signed-off-by: Caroline Concatto <[email protected]>

Running clang-format-7

Signed-off-by: Caroline Concatto <[email protected]>

Removing residue of ostream library

Signed-off-by: Caroline Concatto <[email protected]>

Original-commit: flang-compiler/f18@a3507d44b8911e6024033aa583c1dc54e0eb89fd
Reviewed-on: https://github.com/flang-compiler/f18/pull/1047

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

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

Signed-off-b

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

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

Signed-off-by: Caroline Concatto <[email protected]>

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

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