2019-01-12 Paul Thomas <pault@gcc.gnu.org>
* gfortran.texi : Add description in sections on TS 29113 and
further interoperability with C.
* trans-array.c (gfc_conv_descriptor_attribute): New function.
(gfc_get_dataptr_offset): Remove static function attribute.
* trans-array.h : Add prototypes for above functions.
* trans-decl.c : Add declarations for the library functions
cfi_desc_to_gfc_desc and gfc_desc_to_cfi_desc.
* trans-expr.c (gfc_conv_gfc_desc_to_cfi_desc): New function.
(gfc_conv_procedure_call): Call it for scalar and array actual
arguments, when the formal arguments are bind_c with assumed
shape or assumed rank.
* trans.h : External declarations for gfor_fndecl_cfi_to_gfc
and gfor_fndecl_gfc_to_cfi.
2019-01-12 Paul Thomas <pault@gcc.gnu.org>
* gfortran.dg/ISO_Fortran_binding_1.f90 : New test.
* gfortran.dg/ISO_Fortran_binding_1.c : Auxilliary file for test.
* gfortran.dg/ISO_Fortran_binding_2.f90 : New test.
* gfortran.dg/ISO_Fortran_binding_2.c : Auxilliary file for test.
* gfortran.dg/bind_c_array_params_2.f90 : Change search string
for dump tree scan.
2019-01-12 Paul Thomas <pault@gcc.gnu.org>
* ISO_Fortran_binding.h : New file.
* Makefile.am : Include ISO_Fortran_binding.c in the list of
files to compile.
* Makefile.in : Regenerated.
* gfortran.map : Add _gfortran_cfi_desc_to_gfc_desc,
_gfortran_gfc_desc_to_cfi_desc and the CFI API functions.
* runtime/ISO_Fortran_binding.c : New file containing the new
functions added to the map.
From-SVN: r267881
Make "[nvptx] Force vl32 if calling vector-partitionable routines" work as well
if vector length is set by modifying PTX_DEFAULT_VECTOR_LENGTH.
2019-01-12 Tom de Vries <tdevries@suse.de>
* config/nvptx/nvptx.c (nvptx_goacc_validate_dims_1): In offloading
region calling vector-partitionable routine, set default_vector_length
to WARP_SIZE.
From-SVN: r267879
In nvptx_goacc_validate_dims_1, allow oacc_default_dims[DIM_VECTOR] to be
overridden, by assigning it to a new variable default_vector_length at the
start, and using it at the end.
2019-01-12 Tom de Vries <tdevries@suse.de>
* config/nvptx/nvptx.c (nvptx_goacc_validate_dims_1): Add an use new
variable default_vector_length.
From-SVN: r267878
There's a problem in oacc_validate_dims that when f.i. the worker dimension
is set using -fopenacc-dim=:32, and the vector_length is set using a
"vector_length (128)" clause, the compiler combines, accepts and emits the
values, while the combination of the two is invalid.
The reason for this is that while oacc_validate_dims validates the dimensions
using targetm.goacc.validate_dims before applying default or minimum values,
it does not do so afterwards.
Work around this in the nvptx port by applying the defaults from
oacc_default_dims at the end of nvptx_goacc_validate_dims_1, as
oacc_validate_dims would do it, and then apply the dimensions limits.
2019-01-12 Tom de Vries <tdevries@suse.de>
PR middle-end/88703
* config/nvptx/nvptx.c (nvptx_goacc_validate_dims_1): Apply defaults
from oacc_default_dims, as oacc_validate_dims would do it, and apply
dimensions limits.
From-SVN: r267877
Add a used parameter to TARGET_GOACC_VALIDATE_DIMS, allowing a target to make
decisions in the hook implementation based on whether a dimension is used or
not.
2019-01-12 Tom de Vries <tdevries@suse.de>
* config/nvptx/nvptx.c (nvptx_goacc_validate_dims_1)
(nvptx_goacc_validate_dims): Add used parameter.
* doc/tm.texi: Regenerate.
* omp-offload.c (oacc_parse_default_dims, oacc_validate_dims): Add
argument to call to targetm.goacc.validate_dims.
(default_goacc_validate_dims): Add used
parameter.
* target.def (validate_dims): Add used parameter in DEFHOOK.
* targhooks.h (default_goacc_validate_dims): Add used parameter.
From-SVN: r267876
PR libstdc++/88811
PR libstdc++/83306
* src/filesystem/path.cc: Fix typo. If first path is empty, show []
before second path.
* testsuite/experimental/filesystem/filesystem_error/cons.cc: New
test.
From-SVN: r267868
* doc/xml/manual/intro.xml: Include new section.
* doc/xml/manual/status_cxx2017.xml: Document more
implementation-defined properties of the library.
* doc/xml/manual/status_cxx2020.xml: Document C++2a status.
* doc/html/*: Regenerate.
From-SVN: r267867
This patch implements the C++2a proposal to allow incomplete types in
std::reference_wrapper, which was previously undefined.
The change cannot be implemented for earlier standards, because prior to
C++2a std::reference_wrapper has a weak result type, so must inspect the
template argument to see if it defines a nested result_type member. That
is deprecated (but still required) in C++17, and removed from C++2a.
The removal of the base class from reference_wrapper is a potential ABI
change, as it could alter the layout of a type which derives from
reference_wrapper<T> and from an empty type with _Weak_result_type<T> as
a base class. Previously the repeated _Weak_result_type<T> base class
would have prevented the empty base-class optimization, but if
reference_wrapper<T> no longer derives from it, the empty class could be
placed at the same address as the reference_wrapper<T> base. In
practice, the only types which derive from _Weak_result_type or from
_Reference_wrapper_base_memfun or any of its base classes are non-empty
types defined in libstdc++: std::reference_wrapper, std::function, and
std::_Bind. As they are non-empty types, they are not eligible for EBO
anyway.
* include/bits/refwrap.h [__cplusplus > 201703L]
(_Refwrap_base_arg1, _Refwrap_base_arg2, _Reference_wrapper_base)
(_Reference_wrapper_base_memfun): Do not define for C++2a.
(reference_wrapper): Do not derive from _Reference_wrapper_base_memfun
for C++2a.
(reference_wrapper::operator()): Add static assertion.
* testsuite/20_util/reference_wrapper/incomplete.cc: New test.
From-SVN: r267866
This paper has been included in the C++20 draft, but the changes to add
noexcept can be made unconditionally, to apply for C++11 too.
* include/std/chrono (duration_values::zero(), duration_values::min())
(duration_values::max()): Add noexcept.
(duration::zero(), duration::min(), duration::max()): Likewise.
(time_point::zero(), time_point::min(), time_point::max()): Likewise.
* testsuite/20_util/duration/requirements/noexcept.cc: New test.
* testsuite/20_util/time_point/requirements/noexcept.cc: New test.
From-SVN: r267865
2019-01-11 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/35031
* decl.c (gfc_match_entry): Check for F2018:C1546. Fix nearby
mis-indentation.
2019-01-11 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/35031
* gfortran.dg/pr35031.f90: new test.
From-SVN: r267864
For a struct with zero-sized last field, the address of the
field falls out of the object boundary, which confuses the
garbage collector. Pad an extra byte in this case.
Reviewed-on: https://go-review.googlesource.com/c/157557
From-SVN: r267861
The standard doesn't really talk about an expression depending on the number
of elements of a pack, but that's definitely an important form of template
argument dependence.
* pt.c (instantiation_dependent_r): A template non-type parameter
pack is instantiation-dependent.
From-SVN: r267860
The issue here was that we were cp_folding a location wrapper around a
lambda capture proxy before it had been mark_rvalue_used. I considered
adding mark_rvalue_use calls to build_new_op_1, but it seems appropriate to
have them in cp_fold_maybe_rvalue when we know we're trying to produce an
rvalue.
The change to mark_use is for a related issue: when we change the operand of
the location wrapper from VAR_DECL to INTEGER_CST, we need the TREE_CODE of
the location wrapper to change as well, from VIEW_CONVERT_EXPR to
NON_LVALUE_EXPR.
* expr.c (mark_use): Fix location wrapper handling.
* cp-gimplify.c (cp_fold_maybe_rvalue): Call mark_rvalue_use.
From-SVN: r267859
PR middle-end/85956
PR lto/88733
* tree-inline.h (struct copy_body_data): Add adjust_array_error_bounds
field.
* tree-inline.c (remap_type_1): Formatting fix. If TYPE_MAX_VALUE of
ARRAY_TYPE's TYPE_DOMAIN is newly error_mark_node, replace it with
a dummy "omp dummy var" variable if id->adjust_array_error_bounds.
* omp-low.c (new_omp_context): Set cb.adjust_array_error_bounds.
fortran/
* trans-openmp.c: Include attribs.h.
(gfc_walk_alloc_comps, gfc_omp_clause_linear_ctor): Handle
VAR_DECL max bound with "omp dummy var" attribute like NULL or
error_mark_node - recompute number of elts independently.
testsuite/
* c-c++-common/gomp/pr85956.c: New test.
* g++.dg/gomp/pr88733.C: New test.
From-SVN: r267858
2019-01-11 Vladimir Makarov <vmakarov@redhat.com>
PR rtl-optimization/87305
* lra-assigns.c
(setup_live_pseudos_and_spill_after_risky_transforms): Add code
for little endian pseudos used as paradoxical subreg.
From-SVN: r267854
PR tree-optimization/88693
* tree-ssa-strlen.c (get_min_string_length): Don't set *full_string_p
for STRING_CSTs that don't contain any NUL characters in the first
TREE_STRING_LENGTH bytes.
* gcc.c-torture/execute/pr88693.c: New test.
From-SVN: r267852
PR 88777
PR 88614
* genattrtab.c (min_fn): Don't translate values.
(min_attr_value): Return INT_MAX when the value can't be calculated.
Return minimum among any values that can be calculated.
(max_attr_value): Adjust.
From-SVN: r267851
When using a compiler build with:
...
+#define PTX_DEFAULT_VECTOR_LENGTH PTX_CTA_SIZE
...
consider a test-case:
...
int
main (void)
{
#pragma acc parallel vector_length (64)
#pragma acc loop worker
for (unsigned int i = 0; i < 32; i++)
#pragma acc loop vector
for (unsigned int j = 0; j < 64; j++)
;
return 0;
}
...
If num_workers is 16, either because:
- we add a "num_workers (16)" clause on the parallel directive, or
- we set "GOMP_OPENACC_DIM=:16:", or
- the libgomp plugin chooses 16 num_workers
we run into an illegal instruction at runtime, because a bar.sync instruction
tries to use a barrier 16. The instruction is illegal, because ptx supports
only 16 barriers per CTA, and the valid range is 0..15.
The problem is that with a warp-multiple vector length, we use a code generation
scheme with a per-worker barrier. And because barrier zero is reserved for
per-cta barrier, only the remaining 15 barriers can be used as per-worker
barrier, and consequently we can't use num_workers larger than 15.
This problem occurs only for vector_length 64. For vector_length 32, we use a
different code generation scheme, and for vector_length >= 96, the maximum
num_workers is not big enough not to trigger this problem.
Also, this problem only occurs for num_workers 16. As explained above,
num_workers 15 is safe to use, and 16 is already the maximum num_workers for
vector_length 64.
This patch fixes the problem in both the compiler (handling "num_workers (16)")
and in the libgomp nvptx plugin (with and without "GOMP_OPENACC_DIM=:16:").
2019-01-11 Tom de Vries <tdevries@suse.de>
* config/nvptx/nvptx.c (PTX_CTA_NUM_BARRIERS, PTX_PER_CTA_BARRIER)
(PTX_NUM_PER_CTA_BARRIER, PTX_FIRST_PER_WORKER_BARRIER)
(PTX_NUM_PER_WORKER_BARRIERS): Define.
(nvptx_apply_dim_limits): Prevent vector_length 64 and
num_workers 16.
* plugin/plugin-nvptx.c (nvptx_exec): Prevent vector_length 64 and
num_workers 16.
From-SVN: r267838
Move the defition of PTX_CTA_SIZE up in nvptx.c.
2019-01-11 Tom de Vries <tdevries@suse.de>
* config/nvptx/nvptx.c (PTX_CTA_SIZE): Move up.
From-SVN: r267837
Before the commit "[libgomp, testsuite, openacc] Don't use const int for
dimensions", the "const int" construct was used to set launch dimensions in
reductions-[1-5].c. In the case of -xc -O0, the const int is implemented as a
variable by the C front-end. Consequently, the nvptx back-end generated
warnings that vector_length was overridden to be hard-coded, rather than left to
be set at runtime. The test-cases silenced these warnings by switching off all
warnings in the accelerator compiler using "-foffload=-w".
Given that no warnings occur anymore, remove the "-foffload=-w" setting.
2019-01-11 Tom de Vries <tdevries@suse.de>
* testsuite/libgomp.oacc-c-c++-common/reduction-1.c: Remove
-foffload=-w.
* testsuite/libgomp.oacc-c-c++-common/reduction-2.c: Same.
* testsuite/libgomp.oacc-c-c++-common/reduction-3.c: Same.
* testsuite/libgomp.oacc-c-c++-common/reduction-4.c: Same.
* testsuite/libgomp.oacc-c-c++-common/reduction-5.c: Same.
From-SVN: r267836
Add a test-case that tests the "insufficient resources" fatal in the nvptx
libgomp plugin.
2019-01-11 Tom de Vries <tdevries@suse.de>
* testsuite/libgomp.oacc-c-c++-common/insufficient-resources.c: New
test.
From-SVN: r267835
For 64-bit these should not be emitted without suffix in AT&T mode (as
being ambiguous that way); the suffixes are benign for 32-bit. For
consistency also omit the suffix in Intel mode for {,V}CVTSI2SxQ.
The omission has originally (prior to rev 260691) lead to wrong code
being generated for the 64-bit unsigned-to-float/double conversions (as
gas guesses an L suffix instead of the required Q one when the operand
is in memory). In all remaining cases (being changed here) the omission
would "just" lead to warnings with future gas versions.
As a result, arrange to check for the L suffixes in 32-bit test cases.
In order for related test cases to actually test what they're supposed
to test, add (seemingly unrelated) a few empty "asm volatile()".
Presumably there are more where constant propagation voids the intended
effect of the tests, but these are ones helping make sure the assembler
actually still assembles correctly the output after the changes here.
From-SVN: r267833
The recent changes to support operator<<(nullptr_t) changed the glob
patterns for existing operator<<(T) overloads, but did so incorrectly so
they still matched the new symbols. That broke Solaris bootstrap. This
patch replaces each of the existing globs by two more precise ones,
which match the old symbols but not the new ones.
* config/abi/pre/gnu.ver (GLIBCXX_3.4): Correct recent changes to
basic_ostream::operator<< patterns.
From-SVN: r267832
2019-01-11 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/59345
* trans-array.c (gfc_conv_parameter_array): Temporary
arrays generated for expressions do not need to be repacked.
2019-01-11 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/59345
* gfortran.dg/internal_pack_16.f90: New test.
From-SVN: r267829
2019-01-10 Vladimir Makarov <vmakarov@redhat.com>
PR rtl-optimization/87305
* lra-assigns.c
(setup_live_pseudos_and_spill_after_risky_transforms): Check
allocation for big endian pseudos used as paradoxical subregs and
spill them if it is wrong.
* lra-constraints.c (lra_constraints): Add a comment.
2019-01-10 Vladimir Makarov <vmakarov@redhat.com>
PR rtl-optimization/87305
* gcc.target/aarch64/pr87305.c: New.
From-SVN: r267823
2019-01-10 Richard Biener <rguenther@suse.de>
PR tree-optimization/88792
* tree-ssa-pre.c (get_representative_for): Do not return a
value-number here.
* gcc.dg/torture/pr88792.c: New testcase.
From-SVN: r267821
Jan Hubicka
Jakub Jelinek
Paul Thomas
Tom de Vries
Jakub Jelinek
GCC Administrator
Jonathan Wakely
Steven G. Kargl
Marek Polacek
Ian Lance Taylor
Jason Merrill
Tobias Burnus
Vladimir Makarov
Alan Modra
Steve Ellcey
Tamar Christina
Thomas Schwinge
Martin Liska
Jan Beulich
Paolo Carlini
Thomas Koenig
Richard Biener