This patch only modifies `flang` - the bash wrapper script.
`-fopenmp`/`-fopenacc` are required to enable the OpenMP/OpenACC
extension in the frontend and to make sure that the required libraries
are linked when generating the final binary. This patch makes sure that
`-fopnemp`/`-fopenacc` is used for both unparsing and the code
generation (via the host compiler).
Differential Revision: https://reviews.llvm.org/D106871
Historically the builtin dialect has had an empty namespace. This has unfortunately created a very awkward situation, where many utilities either have to special case the empty namespace, or just don't work at all right now. This revision adds a namespace to the builtin dialect, and starts to cleanup some of the utilities to no longer handle empty namespaces. For now, the assembly form of builtin operations does not require the `builtin.` prefix. (This should likely be re-evaluated though)
Differential Revision: https://reviews.llvm.org/D105149
According to C7109, "A boz-literal-constant shall appear only as a
data-stmt-constant in a DATA statement, or where explicitly allowed in
16.9 as an actual argument of an intrinsic procedure." This change
enforces that constraint for output list items.
I also added a general interface to determine if an expression is a BOZ
literal constant and changed all of the places I could find where it
could be used.
I also added a test.
This change stemmed from the following issue --
https://gitlab-master.nvidia.com/fortran/f18-stage/issues/108
Differential Revision: https://reviews.llvm.org/D106893
`-Mfixed` is not supported by the new driver and hence
`flang`, the bash wrapper script, forwards it to the host compiler.
The forwarded options are used by the host compiler when compiling the
unparsed files. As the unparsed source files are always in the free
form, forwarding `-Mfixed` is problematic.
With this patch, `-Mfixed` (and `-Mfree` for consistency) will be
ignored altogether. The user will only see a warning. This is not a
particularly sound approach, but `flang` is only a temporary solution
for us and this workaround is a fair compromise.
Differential Revision: https://reviews.llvm.org/D106428
Since BOZ literal arguments are typeless, we cannot know how to pass them as
actual arguments to procedures with implicit interfaces. This change avoids
the problem by emitting an error message in such situations.
This change stemmed from the following issue --
https://github.com/flang-compiler/f18-llvm-project/issues/794
Differential Revision: https://reviews.llvm.org/D106831
Fix the external-io unittest under Windows.
In particular, fixes the following issues:
1. When creating a temporary file, open it with read+write permissions
using the _O_RDWR flag. _S_IREAD and _S_IWRITE are for the file
permissions of the created file.
2. _chsize returns 0 on success (just like ftruncate).
3. To set a std::optional, use its assign-operator overload instead of
getting a reference to its value and overwrite that. The latter is
invalid if the std::optional has no value, and is caught by
msvc's debug STL.
The non-GTest unittest is currently not executed under Windows because
of the added .exe extension to the output file: external-io.text.exe.
llvm-lit skips the file because .exe is not in the lists of test
suffixes (.test is). D105315 is going to change that by converting it
to a GTest-test.
Reviewed By: awarzynski
Differential Revision: https://reviews.llvm.org/D106726
When a WRITE overwrites an endfile record, we need to forget
that there was an endfile record. When doing a BACKSPACE
after an explicit ENDFILE statement, the position afterwards
must be upon the endfile record.
Attempts to join list-directed delimited character input across
record boundaries was due to a bad reading of the standard
and has been deleted, now that the requirements are better understood.
This problem would cause a read attempt past EOF if a delimited
character input value was at the end of a record.
It turns out that delimited list-directed (and NAMELIST) character
output is required to emit contiguous doubled instances of the
delimiter character when it appears in the output value. When
fixed-size records are being emitted, as is the case with internal
output, this is not possible when the problematic character falls
on the last position of a record. No two other Fortran compilers
do the same thing in this situation so there is no good precedent
to follow.
Because it seems least wrong, with this patch we now emit one copy
of the delimiter as the last character of the current record and
another as the first character of the next record. (The
second-least-wrong alternative might be to flag a runtime error,
but that seems harsh since it's not an explicit error in the standard,
and the output may not have to be usable later as input anyway.)
Consequently, the output is not suitable for use as list-directed or
NAMELIST input.
If a later standard were to clarify this case, this behavior will of
course change as needed to conform.
Differential Revision: https://reviews.llvm.org/D106695
NAMELIST I/O formatting uses the runtime infrastructure for
list-directed I/O. List-directed input processing has same state
that requires reinitialization for each successive NAMELIST input
item. This patch fixes bugs with "null" items and repetition counts
on NAMELIST input items after the first in the group.
Differential Revision: https://reviews.llvm.org/D106694
This change fixes a bug in the runtime portion of the CSHIFT intrinsic
that happens when the value of the SHIFT argument is negative.
Differential Revision: https://reviews.llvm.org/D106292
I'd previously merged this into the fir-dev branch. This change is to
do the same thing to the main branch of llvm-project.
Differential Revision: https://reviews.llvm.org/D106294
A field in DescriptorAddendum became unused during a recent
change but was not removed from the definition; it now elicits
a legitimate warning that's affecting some buildbots. Remove it.
F18 was sigalling an end-of-file error condition when reading an
unformatted sequential input file without an ultimate newline
(or CR-LF). Other Fortran implementations can handle it, so change
the runtime to support it.
Differential Revision: https://reviews.llvm.org/D106321
Use derived type information tables to drive default component
initialization (when needed), component destruction, and calls to
final subroutines. Perform these operations automatically for
ALLOCATE()/DEALLOCATE() APIs for allocatables, automatics, and
pointers. Add APIs for use in lowering to perform these operations
for non-allocatable/automatic non-pointer variables.
Data pointer component initialization supports arbitrary constant
designators, a F'2008 feature, which may be a first for Fortran
implementations.
Differential Revision: https://reviews.llvm.org/D106297
A rank-0 static descriptor needs to be a vector; it's for
"v-list" values in defined derived type formatted I/O.
(Pushed without pre-review due to high confidence and an
unwell buildbot.)
In the `flang` bash script, we need to be careful _when_ to use <output>
from `flang -c -o <output> <input>` when generating the relocatable
output file name.
In particular, we should use it in this case:
```compilation only
flang -c -o <output> <input>
```
but leave it for the final executable here:
```compile, assemble and link
flang -o <output> <input>
```
This change is implemented in `get_relocatable_name`.
I've also taken the liberty to fix how errors from sub-commands are
reported (without this change, `flang` always returns `0` on failure).
This is implemented in `main`.
Differential Revision: https://reviews.llvm.org/D105896
This patch makes sure that the base name of the temporary unparsed files
(generated by the `flang` bash script) are randomised and unique to a
particular invocation of the script. Otherwise, we cannot reliably run
the script in parallel.
Differential Revision: https://reviews.llvm.org/D106052
The following semantic check is removed in OpenMP Version 5.0:
```
Taskloop simd construct restrictions: No reduction clause can be specified.
```
Also fix several typos.
Reviewed By: kiranchandramohan
Differential Revision: https://reviews.llvm.org/D105874
Currently, `flang -c file.f` generates `flang_unparsed_source_file_0.o`.
This is incorrect. This patch:
* simplifies the logic around output filename generation, and
* makes sure that `file.o` is produced instead of e.g.
`flang_unparsed_source_file_0.o` when using the `-c` flag
The output filename generation is moved to a dedicated function. I've
also made a few minor improvements, e.g. marked variables as local,
added comments, refined error messages.
Differential Revision: https://reviews.llvm.org/D105546
Name resolution is always creating symbols with HostAssocDetails
for host variable names inside internal procedures. This helps lowering
identifying and dealing with such variables inside internal procedures.
However, the case where the variable appears in an ArrayRef mis-parsed
as a FunctionRef goes through a different name resolution path that did
not create such HostAssocDetails when needed. Pointer assignment RHS
are also skipping this path.
Add the logic to create HostAssocDetails for host symbols inisde internal
procedures that appear in mis-parsed ArrayRef or in pointer assignment RHS.
Differential Revision: https://reviews.llvm.org/D105464
The bash wrapper script, `flang`, calls `flang-new -fc1` under the hood,
which does not support `--version` (this is consistent with `clang -cc1
--version`). This change is needed for `flang --version` to work as
expected.
Note that `flang --version` (the Flang bash wrapper script for the
compiler driver) gives rather minimal output compared to `flang-new
--version` (the Flang compiler driver). As the wrapper script is just a
temporary solution for us, this should be sufficient.
Differential Revision: https://reviews.llvm.org/D105352
Until now, `f18` would:
1. Use Flang to unparse the input files
2. Call an external Fortran compiler to compile the unparsed source
files (generated in step 1)
With this patch, `f18` will stop after unparsing the input source files,
i.e. step 1 above. The `flang` bash script will take care of step 2,
i.e. calling an external Fortran compiler driver to compile them. This
way:
* the functionality of `f18` is reduced - it will only drive Flang (as
opposed to delegating code-generation to an external tool on top of
this)
* we will able to switch between `f18` and `flang-new` for unparsing before
an external Fortran compiler is called for code-generation
The updated `flang` bash script needs to specify the output file when
using the `-fdebug-unparse` action. Both `f18` and `flang-new` have been
updated accordingly.
These changes were discussed in [1] as a requirement for replacing `f18`
with `flang-new`.
[1] https://lists.llvm.org/pipermail/flang-dev/2021-April/000677.html
Differential Revision: https://reviews.llvm.org/D103177
SYSTEM_CLOCK may take up to 3 optional parameters, all of which are
INTENT(OUT). The COUNT and COUNT_MAX parameters are integer scalars,
while COUNT_RATE may be a real or integer scalar.
This patch breaks up the interface into 3 different functions, one for
each parameter. All 3 return integers. It is up to lowering to convert
the results to the preferred type.
Differential Revision: https://reviews.llvm.org/D104851
Non-advancing I/O was failing; ExternalFileUnit was losing
track of what writes had been committed to the file. Fixed.
Also, support the common extension of $ and \ in a FORMAT
as being equivalent to ADVANCE=NO.
Differential Revision: https://reviews.llvm.org/D105046
With derived type description tables now available to the
runtime library, it is possible to implement the concept
of "child" I/O statements in the runtime and use them to
convert instances of derived type I/O data transfers into
calls to user-defined subroutines when they have been specified
for a type. (See Fortran 2018, subclauses 12.6.4.8 & 13.7.6).
- Support formatted, list-directed, and NAMELIST
transfers to internal parent units; support these, and unformatted
transfers, for external parent units.
- Support nested child defined derived type I/O.
- Parse DT'foo'(v-list) FORMAT data edit descriptors and passes
their strings &/or v-list values as arguments to the defined
formatted I/O routines.
- Fix problems with this feature encountered in semantics and
FORMAT valiation during development and end-to-end testing.
- Convert typeInfo::SpecialBinding from a struct to a class
after adding a member function.
Differential Revision: https://reviews.llvm.org/D104930
There are situations where the arguments of intrinsics must be
conformable, which is defined in section 3.36. This means they must
have "the same shape, or one being an array and the other being scalar".
But the check we were actually making was that their ranks were the same.
This change fixes that and adds a test for the UNPACK intrinsic, where
the FIELD argument "shall be conformable with MASK".
Differential Revision: https://reviews.llvm.org/D104936
A recent change that extended semantic analysis for actual arguments
that associate with procedure dummy arguments exposed some bugs in
regression test suites due to points of confusion in symbol table
handling in situations where a generic interface contains a specific
procedure of the same name. When passing that name as an actual
argument, for example, it's necessary to take this possibility into
account because the symbol for the generic interface shadows the
symbol of the same name for the specific procedure, which is
what needs to be checked. So add a small utility that bypasses
the symbol for a generic interface in this case, and use it
where needed.
Differential Revision: https://reviews.llvm.org/D104929
In https://reviews.llvm.org/D103612, a definition of an instance of
`Fortran::parser::AnalyzedObjectsAsFortran` was moved (that object is
used in unparsing). That, in turn, introduced a dependency of the unit
tests on the `FortranEvaluate` library, which defines
`AnalyzedObjectsAsFortran`.
That dependency was missed in D103612 and has caused shared-library
builds to fail. I'm submitting this without a review, as it's rather
straightforward omission.
This patch adds a new option for the new Flang driver:
`-fno-analyzed-objects-for-unparse`. The semantics are similar to
`-funparse-typed-exprs-to-f18-fc` from `f18`. For consistency, the
latter is replaced with `-fno-analyzed-objects-for-unparse`.
The new option controls the behaviour of the unparser (i.e. the action
corresponding to `-fdebug-unparse`). The default behaviour is to use the
analyzed objects when unparsing. The new flag can be used to turn this
off, so that the original parse-tree objects are used. The analyzed
objects are generated during the semantic checks [1].
This patch also updates the semantics of
`-fno-analyzed-objects-for-unparse`/`-funparse-typed-exprs-to-f18-fc`
in `f18`, so that this flag is always taken into account when `Unparse`
is used (this way the semantics in `f18` and `flang-new` are identical).
The added test file is based on example from Peter Steinfeld.
[1]
https://github.com/llvm/llvm-project/blob/main/flang/docs/Semantics.md
Differential Revision: https://reviews.llvm.org/D103612
argument instead of a result result object.
Change the reshape flang unit test to use the new interface. Also, add an
order argument to exercise the order subscript code in the rehsape runtime
routine.
Differential Revision: https://reviews.llvm.org/D104586
This adjusts the workaround from D104731.
The issue lies in libstdc++'s classes, not GCC itself, and manifests
itself in the same way if building e.g. with clang while using
libstdc++ headers from GCC 7 (e.g. if building with Clang on Ubuntu 18.04,
while using the system default C++ library).
Therefore, change the condition to look for the version of libstdc++
instead of the compiler.
Differential Revision: https://reviews.llvm.org/D104779
Work around two problems with GCC 7.3.
One is its inability to implement "constexpr operator=(...) = default;"
in a class with a std::optional<> component; another is a legitimate-
looking warning about an unused variable.
Differential Revision: https://reviews.llvm.org/D104731
Refactor the recently-implemented MAXVAL/MINVAL folding so
that the parts that can be used to implement other reduction
transformational intrinsic function folding are exposed.
Use them to implement folding of IALL, IANY, IPARITY,
SUM. and PRODUCT. Replace the folding of ALL & ANY to
use the new infrastructure and become able to handle DIM=
arguments.
Differential Revision: https://reviews.llvm.org/D104562
One of the buildbots uses a compiler (can't tell which) that
doesn't approve of a "default:" in a switch statement whose
cases appear to completely cover all possible values of an
enum class. But this switch is in raw data dumping code that
needs to allow for incorrect values in memory. So rewrite it
as a cascade of if statements; performance doesn't matter here.
Andrzej Warzynski