libstdc++-v3/ChangeLog:

	PR libstdc++/109849
	* include/bits/vector.tcc (vector::_M_range_insert): Fix
	reversed args in length calculation.

	PR fortran/71884

gcc/fortran/ChangeLog:

	* resolve.cc (resolve_allocate_expr): Reject intrinsic NULL as
	source-expr.

gcc/testsuite/ChangeLog:

	* gfortran.dg/pr71884.f90: New test.

This patch uses the count_ctor_elements function to fix up
unify deduction of array sizes.

2025-01-15  Jakub Jelinek  <jakub@redhat.com>

	PR c++/118390
	* cp-tree.h (count_ctor_elements): Declare.
	* call.cc (count_ctor_elements): No longer static.
	* pt.cc (unify): Use count_ctor_elements instead of
	CONSTRUCTOR_NELTS.

	* g++.dg/cpp/embed-20.C: New test.
	* g++.dg/cpp0x/pr118390.C: New test.

Fix the neoverse512tvb tuning to be like Neoverse V1/V2 and add the
missing AARCH64_EXTRA_TUNE_BASE and AARCH64_EXTRA_TUNE_AVOID_PRED_RMW.

gcc:
	* config/aarch64/tuning_models/neoverse512tvb.h (tune_flags): Update.

Add FULLY_PIPELINED_FMA to tune baseline - this is a generic feature that is
already enabled for some cores, but benchmarking it shows it is faster on all
modern cores (SPECFP improves ~0.17% on Neoverse V1 and 0.04% on Neoverse N1).

gcc:
	* config/aarch64/aarch64-tuning-flags.def (AARCH64_EXTRA_TUNE_BASE):
	Add AARCH64_EXTRA_TUNE_FULLY_PIPELINED_FMA.
	* config/aarch64/tuning_models/ampere1b.h: Remove redundant
	AARCH64_EXTRA_TUNE_FULLY_PIPELINED_FMA.
	* config/aarch64/tuning_models/neoversev2.h: Likewise.

ILP32 was originally intended to make porting to AArch64 easier.  Support was
never merged in the Linux kernel or GLIBC, so it has been unsupported for many
years.  There isn't a benefit in keeping unsupported features forever, so
deprecate it now (and it could be removed in a future release).

gcc:
	* config/aarch64/aarch64.cc (aarch64_override_options): Add warning.
	* doc/invoke.texi: Document -mabi=ilp32 as deprecated.

gcc/testsuite:
	* gcc.target/aarch64/inline-mem-set-pr112804.c: Add -Wno-deprecated.
	* gcc.target/aarch64/pr100518.c: Likewise.
	* gcc.target/aarch64/pr113114.c: Likewise.
	* gcc.target/aarch64/pr80295.c: Likewise.
	* gcc.target/aarch64/pr94201.c: Likewise.
	* gcc.target/aarch64/pr94577.c: Likewise.
	* gcc.target/aarch64/sve/pr108603.c: Likewise.

CO-RE accesses with non pointer struct variables will also generate a
"0" string access within the CO-RE relocation.
The first index within the access string, has sort of a different
meaning then the remaining of the indexes.
For i0:i1:...:in being an access index for "struct A a" declaration, its
semantics are represented by:
  (&a + (sizeof(struct A) * i0) + offsetof(i1:...:in)

gcc/ChangeLog:
	* config/bpf/core-builtins.cc (compute_field_expr): Change
	VAR_DECL outcome in switch case.

gcc/testsuite/ChangeLog:
	* gcc.target/bpf/core-builtin-1.c: Correct test.
	* gcc.target/bpf/core-builtin-2.c: Correct test.
	* gcc.target/bpf/core-builtin-exprlist-1.c: Correct test.

When traversing gimple to introduce CO-RE relocation entries to
expressions that are accesses to attributed perserve_access_index types,
the access is likely to be split in multiple gimple statments.
In order to keep doing the proper CO-RE convertion we will need to mark
the LHS tree nodes of gimple expressions as explicit CO-RE accesses,
such that the gimple traverser will further convert the sub-expressions.

This patch makes sure that this LHS marking will not happen in case the
gimple statement is a function call, which case it is no longer
expecting to keep generating CO-RE accesses with the remaining of the
expression.

gcc/ChangeLog:

	* config/bpf/core-builtins.cc
	(make_gimple_core_safe_access_index): Fix in condition.

gcc/testsuite/ChangeLog:

	* gcc.target/bpf/core-attr-calls.c: New test.

Based on observation within bpf-next selftests and comparisson of GCC
and clang compiled code, the BPF loader expects all CO-RE relocations to
point to BTF non const and non volatile type nodes.

gcc/ChangeLog:

	* btfout.cc (get_btf_kind): Remove static from function definition.
	* config/bpf/btfext-out.cc (bpf_code_reloc_add): Check if CO-RE type
	is not a const or volatile.
	* ctfc.h (btf_dtd_kind): Add prototype for function.

gcc/testsuite/ChangeLog:

	* gcc.target/bpf/core-attr-const.c: New test.

As the following testcases show (mangle80.C only after reversion of the
temporary reversion of C++ large array speedup commit), RAW_DATA_CST can
be seen during mangling of some templates and we ICE because
the mangler doesn't handle it.

The following patch handles it and mangles it the same as a sequence of
INTEGER_CSTs that were used previously instead.
The only slight complication is that if ce->value is the last nonzero
element, we need to skip the zeros at the end of RAW_DATA_CST.

2025-01-03  Jakub Jelinek  <jakub@redhat.com>

	PR c++/118278
	* mangle.cc (write_expression): Handle RAW_DATA_CST.

	* g++.dg/abi/mangle80.C: New test.
	* g++.dg/cpp/embed-19.C: New test.

Compiling this test, we emit:

  error: 'static void CW<T>::operator=(int) requires requires(typename'decltype_type' not supported by pp_cxx_unqualified_id::type x) {x;}' must be a non-static member function

where the DECLTYPE_TYPE isn't printed properly.  This patch fixes that
to print:

error: 'static void CW<T>::operator=(int) requires requires(typename decltype(T())::type x) {x;}' must be a non-static member function

	PR c++/118139

gcc/cp/ChangeLog:

	* cxx-pretty-print.cc (pp_cxx_nested_name_specifier): Handle
	a computed-type-specifier.

gcc/testsuite/ChangeLog:

	* g++.dg/diagnostic/decltype1.C: New test.

Reviewed-by: Jason Merrill <jason@redhat.com>

libstdc++-v3/ChangeLog:

	* testsuite/28_regex/traits/char/transform_primary.cc: Fix
	subclause numbering in references to the standard.

In g:3c32575e I made a mistake and incorrectly
replaced the type of the arguments of an expression with the type of the
expression.  This is of course wrong.

This reverts that change and I have also double checked the other replacements
and they are fine.

gcc/ChangeLog:

	PR middle-end/118472
	* fold-const.cc (operand_compare::operand_equal_p): Fix incorrect
	replacement.

gcc/testsuite/ChangeLog:

	PR middle-end/118472
	* gcc.dg/pr118472.c: New test.

The following adds /* <num> */ to dbg_line_numbers so there's the chance
to more easily lookup the ID of the match.pd line number used for
dumping when you want to debug a speicific replacement.  It also cuts
the lines down to 10 entries.

  static int dbg_line_numbers[1267] = {
        /* 0 */ 161, 164, 173, 175, 178, 181, 183, 189, 197, 195,
        /* 10 */ 199, 201, 205, 923, 921, 2060, 2071, 2052, 2058, 2063,
...

	* genmatch.cc (define_dump_logs): Make reverse lookup in
	dbg_line_numbers easier by adding comments with start index
	and cutting number of elements per line to 10.

As reported in PR117079, commit ab187858 broke the test pr105493.c.
The test code contains two loops, where the first one is exected to be
vectorized.  The commit that broke that vectorization was the first of
several that enabled vectorization of both loops.
Now, that GCC can vectorize the whole function, let's adjust this test
to expect vectorization of both loops by ensuring that we don't write
to the helper-array 'tmp'.

Signed-off-by: Christoph Müllner <christoph.muellner@vrull.eu>

	PR target/117079

gcc/testsuite/ChangeLog:

	* gcc.target/i386/pr105493.c: Fix expected vectorization

Signed-off-by: Christoph Müllner <christoph.muellner@vrull.eu>

To find the variant declaration, a call is constructed in
omp_declare_variant_finalize_one, which gives here:
  TARGET_EXPR <D.3010, variant_fn ()>

Extracting now the function declaration failed and gave the bogus
  error: could not find variant declaration

Solution: Use the 2nd argument of the TARGET_EXPR and continue.

	PR c++/118486

gcc/cp/ChangeLog:

	* decl.cc (omp_declare_variant_finalize_one): When resolving
	the variant to use, handle variant calls with TARGET_EXPR.

gcc/testsuite/ChangeLog:

	* g++.dg/gomp/declare-variant-11.C: New test.

Other spots in cgraphunit.cc already call bitmap_obstack_initialize (NULL);
before running a pass list and bitmap_obstack_release (NULL); after that,
while process_new_functions wasn't doing that and with the new r15-130
bitmap_alloc checking that results in ICE.

2025-01-15  Jakub Jelinek  <jakub@redhat.com>

	PR ipa/116068
	* cgraphunit.cc (symbol_table::process_new_functions): Call
	bitmap_obstack_initialize (NULL); and bitmap_obstack_release (NULL)
	around processing the functions.

	* gcc.dg/graphite/pr116068.c: New test.

c++: Delete defaulted operator <=> if std::strong_ordering::equal doesn't convert to its rettype [PR118387]

Note, the PR raises another problem.
If on the same testcase the B b; line is removed, we silently synthetize
operator<=> which will crash at runtime due to returning without a return
statement.  That is because the standard says that in that case
it should return static_cast<int>(std::strong_ordering::equal);
but I can't find anywhere wording which would say that if that isn't
valid, the function is deleted.
https://eel.is/c++draft/class.compare#class.spaceship-2.2
seems to talk just about cases where there are some members and their
comparison is invalid it is deleted, but here there are none and it
follows
https://eel.is/c++draft/class.compare#class.spaceship-3.sentence-2
So, we synthetize with tf_none, see the static_cast is invalid, don't
add error_mark_node statement silently, but as the function isn't deleted,
we just silently emit it.
Should the standard be amended to say that the operator should be deleted
even if it has no elements and the static cast from
https://eel.is/c++draft/class.compare#class.spaceship-3.sentence-2

On Fri, Jan 10, 2025 at 12:04:53PM -0500, Jason Merrill wrote:
> That seems pretty obviously what we want, and is what the other compilers
> implement.

This patch implements it then.

2025-01-15  Jakub Jelinek  <jakub@redhat.com>

	PR c++/118387
	* method.cc (build_comparison_op): Set bad if
	std::strong_ordering::equal doesn't convert to rettype.

	* g++.dg/cpp2a/spaceship-err6.C: Expect another error.
	* g++.dg/cpp2a/spaceship-synth17.C: Likewise.
	* g++.dg/cpp2a/spaceship-synth-neg6.C: Likewise.
	* g++.dg/cpp2a/spaceship-synth-neg7.C: New test.

	* testsuite/25_algorithms/default_template_value.cc
	(Input::operator<=>): Use auto as return type rather than bool.

The previous patch made me look around some more and I found
maybe_init_list_as_array doesn't handle RAW_DATA_CSTs correctly either,
while the RAW_DATA_CST is properly split during finish_compound_literal,
it was using CONSTRUCTOR_NELTS as the size of the arrays, which is wrong,
RAW_DATA_CST could stand for far more initializers.

2025-01-15  Jakub Jelinek  <jakub@redhat.com>

	PR c++/118124
	* cp-tree.h (build_array_of_n_type): Change second argument type
	from int to unsigned HOST_WIDE_INT.
	* tree.cc (build_array_of_n_type): Likewise.
	* call.cc (count_ctor_elements): New function.
	(maybe_init_list_as_array): Use it instead of CONSTRUCTOR_NELTS.
	(convert_like_internal): Use length from init's type instead of
	len when handling the maybe_init_list_as_array case.

	* g++.dg/cpp0x/initlist-opt5.C: New test.

The following testcases ICE due to RAW_DATA_CST not being handled where it
should be during ck_list conversions.

The last 2 testcases started ICEing with r15-6339 committed yesterday
(speedup of large initializers), the first two already with r15-5958
(#embed optimization for C++).

For conversion to initializer_list<unsigned char> or char/signed char
we can optimize and keep RAW_DATA_CST with adjusted type if we report
narrowing errors if needed, for others this converts each element
separately.

2025-01-15  Jakub Jelinek  <jakub@redhat.com>

	PR c++/118124
	* call.cc (convert_like_internal): Handle RAW_DATA_CST in
	ck_list handling.  Formatting fixes.

	* g++.dg/cpp/embed-15.C: New test.
	* g++.dg/cpp/embed-16.C: New test.
	* g++.dg/cpp0x/initlist-opt3.C: New test.
	* g++.dg/cpp0x/initlist-opt4.C: New test.

`.MASK_LEN_FOLD_LEFT_PLUS`(or `mask_len_fold_left_plus_m`) is expecting the
return value will be the start value even if the length is 0.

However current code gen in RISC-V backend is not meet that semantic, it will
result a random garbage value if length is 0.

Let example by current code gen for MASK_LEN_FOLD_LEFT_PLUS with f64:
        # _148 = .MASK_LEN_FOLD_LEFT_PLUS (stmp__148.33_134, vect__70.32_138, { -1, ... }, loop_len_161, 0);
        vsetvli zero,a5,e64,m1,ta,ma
        vfmv.s.f        v2,fa5     # insn 1
        vfredosum.vs    v1,v1,v2   # insn 2
        vfmv.f.s        fa5,v1     # insn 3

insn 1:
- vfmv.s.f won't do anything if VL=0, which means v2 will contain garbage value.
insn 2:
- vfredosum.vs won't do anything if VL=0, and keep vd unchanged even TA.
(v-spec say: `If vl=0, no operation is performed and the destination register
 is not updated.`)
insn 3:
- vfmv.f.s will move the value from v1 even VL=0, so this is safe.

So how we fix that? we need two fix for that:

1. insn 1: need always execute with VL=1, so that we can guarantee it will
           always work as expect.
2. insn 2: Add new pattern to force `vd` use same reg as `vs1` (start value) for
           all reduction patterns, then we can guarantee vd[0] will contain the
           start value when vl=0

For 1, it's just a simple change to riscv_vector::expand_reduction, but for 2,
we have to add _VL0_SAFE variant reduction to force `vd` use same reg as `vs1`
(start value).

Change since V3:
- Rename _AV to _VL0_SAFE for readability.
- Use non-VL0_SAFE version if VL is const or VLMAX.
- Only force VL=1 for vfmv.s.f when VL is non-const and non-VLMAX.
- Two more testcase.

gcc/ChangeLog:

	PR target/118182
	* config/riscv/autovec-opt.md (*widen_reduc_plus_scal_<mode>): Adjust
	argument for expand_reduction.
	(*widen_reduc_plus_scal_<mode>): Ditto.
	(*fold_left_widen_plus_<mode>): Ditto.
	(*mask_len_fold_left_widen_plus_<mode>): Ditto.
	(*cond_widen_reduc_plus_scal_<mode>): Ditto.
	(*cond_len_widen_reduc_plus_scal_<mode>): Ditto.
	(*cond_widen_reduc_plus_scal_<mode>): Ditto.
	* config/riscv/autovec.md (reduc_plus_scal_<mode>): Adjust argument for
	expand_reduction.
	(reduc_smax_scal_<mode>): Ditto.
	(reduc_umax_scal_<mode>): Ditto.
	(reduc_smin_scal_<mode>): Ditto.
	(reduc_umin_scal_<mode>): Ditto.
	(reduc_and_scal_<mode>): Ditto.
	(reduc_ior_scal_<mode>): Ditto.
	(reduc_xor_scal_<mode>): Ditto.
	(reduc_plus_scal_<mode>): Ditto.
	(reduc_smax_scal_<mode>): Ditto.
	(reduc_smin_scal_<mode>): Ditto.
	(reduc_fmax_scal_<mode>): Ditto.
	(reduc_fmin_scal_<mode>): Ditto.
	(fold_left_plus_<mode>): Ditto.
	(mask_len_fold_left_plus_<mode>): Ditto.
	* config/riscv/riscv-v.cc (expand_reduction): Add one more
	argument for reduction code for vl0-safe.
	* config/riscv/riscv-protos.h (expand_reduction): Ditto.
	* config/riscv/vector-iterators.md (unspec): Add _VL0_SAFE variant of
	reduction.
	(ANY_REDUC_VL0_SAFE): New.
	(ANY_WREDUC_VL0_SAFE): Ditto.
	(ANY_FREDUC_VL0_SAFE): Ditto.
	(ANY_FREDUC_SUM_VL0_SAFE): Ditto.
	(ANY_FWREDUC_SUM_VL0_SAFE): Ditto.
	(reduc_op): Add _VL0_SAFE variant of reduction.
	(order) Ditto.
	* config/riscv/vector.md (@pred_<reduc_op><mode>): New.

gcc/testsuite/ChangeLog:

	PR target/118182
	* gfortran.target/riscv/rvv/pr118182.f: New.
	* gcc.target/riscv/rvv/autovec/pr118182-1.c: New.
	* gcc.target/riscv/rvv/autovec/pr118182-2.c: New.

When we have the situation of an external SLP node that is
permuted the scalar stmts recorded in the permute node do not
mean the scalar computation can be removed.  We are removing
those stmts from the vectorized_scalar_stmts for this reason
but we fail to check this set when we cost scalar stmts.  Note
vectorized_scalar_stmts isn't a complete set so also pass
scalar_stmts_in_externs and check that.

The following fixes this.

This shows in PR115777 when we avoid vectorizing the load, but
on it's own doesn't help the PR yet.

	PR tree-optimization/115777
	* tree-vect-slp.cc (vect_bb_slp_scalar_cost): Do not
	cost a scalar stmt that needs to be preserved.

I used link() to create cheap copies of Incremental LTO cache contents
to prevent their deletion once linking is finished.
This is unnecessary, since output_files are deleted in our lto-plugin
and not in the linker itself.

Bootstrapped/regtested on x86_64-linux.
lto-wrapper now again builds on MinGW. Though so far I have not setup
MinGW to be able to do full bootstrap.
Ok for trunk?

	PR lto/118238

gcc/ChangeLog:

	* lto-wrapper.cc (run_gcc): Remove link() copying.

lto-plugin/ChangeLog:

	* lto-plugin.c (cleanup_handler):
	Keep output_files when using Incremental LTO.
	(onload): Detect Incremental LTO.

Clearly an oversight in the generic-ooo model caught by the checking code.  I
should have realized it was generic-ooo as we don't have a pipeline description
for the tenstorrent design yet, just the costing model.

The patch was extracted from the BZ which indicated Anton was the author, so I
kept that.  I'm listed as co-author just in case someone wants to complain
about the testcase in the future.  I didn't do any notable lifting here.

Thanks Peter and Anton!

	PR target/118170
gcc/
	* config/riscv/generic-ooo.md (generic_ooo_float_div_half): New
	reservation.

gcc/testsuite
	* gcc.target/riscv/pr118170.c: New test.

Co-authored-by: Jeff Law <jlaw@ventanamicro.com>

> The BZ in question is a failure to recognize a pair of shifts as a sign
> extension.
>
> I originally thought simplify-rtx would be the right framework to
> address this problem, but fwprop is actually better.  We can write the
> recognizer much simpler in that framework.
>
> fwprop already simplifies nested shifts/extensions to the desired RTL,
> but it's not considered profitable and we throw away the good work done
> by fwprop & simplifiers.
>
> It's hard to see a scenario where nested shifts or nested extensions
> that simplify down to a single sign/zero extension isn't a profitable
> transformation.  So when fwprop has nested shifts/extensions that
> simplifies to an extension, we consider it profitable.
>
> This allow us to simplify the testcase on rv64 with ZBB enabled from a
> pair of shifts to a single byte or half-word sign extension.

Hmm.  So just to summarise something that was discussed in the PR
comments, this is a case where combine's expand_compound_operation/
make_compound_operation wrangler hurts us, because the process isn't
idempotent, and combine produces two complex instructions:

(insn 6 3 7 2 (set (reg:DI 137 [ _3 ])
        (ashift:DI (reg:DI 139 [ x ])
            (const_int 24 [0x18]))) "foo.c":2:20 305 {ashldi3}
     (expr_list:REG_DEAD (reg:DI 139 [ x ])
        (nil)))
(insn 12 7 13 2 (set (reg/i:DI 10 a0)
        (sign_extend:DI (ashiftrt:SI (subreg:SI (reg:DI 137 [ _3 ]) 0)
                (const_int 24 [0x18])))) "foo.c":2:27 321 {ashrsi3_extend}
     (expr_list:REG_DEAD (reg:DI 137 [ _3 ])
        (nil)))

given two simple instructions:

(insn 6 3 7 2 (set (reg:SI 137 [ _3 ])
        (sign_extend:SI (subreg:QI (reg/v:DI 136 [ x ]) 0))) "foo.c":2:20 533 {*extendqisi2_bitmanip}
     (expr_list:REG_DEAD (reg/v:DI 136 [ x ])
        (nil)))
(insn 7 6 12 2 (set (reg:DI 138 [ _3 ])
        (sign_extend:DI (reg:SI 137 [ _3 ]))) "foo.c":2:20 discrim 1 133 {*extendsidi2_internal}
     (expr_list:REG_DEAD (reg:SI 137 [ _3 ])
        (nil)))

If I run with -fdisable-rtl-combine then late_combine1 already does the
expected transformation.

Although it would be nice to fix combine, that might be difficult.
If we treat combine as immutable then the options are:

(1) Teach simplify-rtx to simplify combine's output into a single sign_extend.

(2) Allow fwprop1 to get in first, before combine has a chance to mess
    things up.

The patch goes for (2).

Is that a fair summary?

Playing devil's advocate, I suppose one advantage of (1) is that it
would allow the optimisation even if the original rtl looked like
combine's output.  And fwprop1 doesn't distinguish between cases in
which the source instruction disappears from cases in which the source
instruction is kept.  Thus we could transform:

  (set (reg:SI R2) (sign_extend:SI (reg:QI R1)))
  (set (reg:DI R3) (sign_extend:DI (reg:SI R2)))

into:

  (set (reg:SI R2) (sign_extend:SI (reg:QI R1)))
  (set (reg:DI R3) (sign_extend:DI (reg:QI R1)))

which increases the register pressure between the two instructions
(since R2 and R1 are both now live).  In general, there could be
quite a gap between the two instructions.

On the other hand, even in that case, fwprop1 would be parallelising
the extensions.  And since we're talking about unary operations,
even two-address targets would allow R1 to be extended without
tying the source and destination.

Also, it seems relatively unlikely that expand would produce code
that looks like combine's, since the gimple optimisers should have
simplified it into conversions.

So initially I was going to agree that it's worth trying in fwprop.  But...

[ commentary on Jeff's original approach dropped. ]

So it seems like it's a bit of a mess 

If we do try to fix combine, I think something like the attached
would fit within the current scheme.  It is a pure shift-for-shift
transformation, avoiding any extensions.

Will think more about it, but wanted to get the above stream of
consciousness out before I finish for the day 



	PR rtl-optimization/109592
gcc/
	* simplify-rtx.cc (simplify_context::simplify_binary_operation_1):
	Simplify nested shifts with subregs.

gcc/testsuite
	* gcc.target/riscv/pr109592.c: New test.
	* gcc.target/riscv/sign-extend-rshift.c: Adjust expected output

Co-authored-by: Jeff Law <jlaw@ventanamicro.com>

Raw dump of lang tree was missing information about virtual method call.
The information is provided in "tok" field of obj_type_ref.

gcc/ChangeLog:

	* tree-dump.cc (dequeue_and_dump): Handle OBJ_TYPE_REF.

gcc/testsuite/ChangeLog:

	* g++.dg/diagnostic/lang-dump-1.C: New test.

D front-end changes:

	- Import latest fixes from dmd v2.110.0-rc.1.

D runtime changes:

	- Import latest fixes from druntime v2.110.0-rc.1.

Phobos changes:

	- Import latest fixes from phobos v2.110.0-rc.1.

Included in the merge are fixes for the following PRs:

	PR d/118438
	PR d/118448
	PR d/118449

gcc/d/ChangeLog:

	* dmd/MERGE: Merge upstream dmd d6f693b46a.
	* d-incpath.cc (add_import_paths): Update for new front-end interface.

libphobos/ChangeLog:

	* libdruntime/MERGE: Merge upstream druntime d6f693b46a.
	* src/MERGE: Merge upstream phobos 336bed6d8.
	* testsuite/libphobos.init_fini/custom_gc.d: Adjust test.

Arrange for decode_field_reference to use local variables throughout,
to modify the out parms only when we're about to return non-NULL, and
to drop the unused case of NULL pand_mask, that had a latent failure
to detect signbit masking.


for  gcc/ChangeLog

	* gimple-fold.cc (decode_field_reference): Rebustify to set
	out parms only when returning non-NULL.
	(fold_truth_andor_for_ifcombine): Bail if
	decode_field_reference returns NULL.  Add complementary assert
	on r_const's not being set when l_const isn't.

In c++/102990 we had a problem where massage_init_elt got {},
digest_nsdmi_init turned that {} into { .value = (int) 1.0e+0 },
and we crashed in the call to fold_non_dependent_init because
a FIX_TRUNC_EXPR/FLOAT_EXPR got into tsubst*.  So we avoided
calling fold_non_dependent_init for a CONSTRUCTOR.

But that broke the following test, where we no longer fold the
CONST_DECL in
  { .type = ZERO }
to
  { .type = 0 }
and then process_init_constructor_array does:

            if (next != error_mark_node
                && (initializer_constant_valid_p (next, TREE_TYPE (next))
                    != null_pointer_node))
              {
                /* Use VEC_INIT_EXPR for non-constant initialization of
                   trailing elements with no explicit initializers.  */
                picflags |= PICFLAG_VEC_INIT;

because { .type = ZERO } isn't initializer_constant_valid_p.  Then we
create a VEC_INIT_EXPR and say we can't convert the argument.

So we have to fold the elements of the CONSTRUCTOR.  We just can't
instantiate the elements in a template.

This also fixes c++/118047.

	PR c++/118047
	PR c++/118355

gcc/cp/ChangeLog:

	* typeck2.cc (massage_init_elt): Call fold_non_dependent_init
	unless for a CONSTRUCTOR in a template.

gcc/testsuite/ChangeLog:

	* g++.dg/cpp0x/nsdmi-list10.C: New test.
	* g++.dg/cpp0x/nsdmi-list9.C: New test.

Reviewed-by: Jason Merrill <jason@redhat.com>

After reimplementing late resolution of "declare variant", the
declare_variant_alt and calls_declare_variant_alt flags on struct
cgraph_node are no longer used by anything.  For the purposes of
marking functions that need late resolution, the
has_omp_variant_constructs flag has replaced
calls_declare_variant_alt.

Likewise struct omp_declare_variant_entry, struct
omp_declare_variant_base_entry, and the hash tables used to store
these structures are no longer needed, since the information needed for
late resolution is now stored in the gomp_variant_construct nodes.

In addition, some obsolete code that was temporarily ifdef'ed out
instead of delted in order to produce a more readable patch for the
previous installment of this series is now removed entirely.

There are no functional changes in this patch, just removing dead code.

gcc/ChangeLog
	* cgraph.cc (symbol_table::create_edge): Don't set
	calls_declare_variant_alt in the caller.
	* cgraph.h (struct cgraph_node): Remove declare_variant_alt
	and calls_declare_variant_alt flags.
	* cgraphclones.cc (cgraph_node::create_clone): Don't copy
	calls_declare_variant_alt bit.
	* gimplify.cc: Remove previously #ifdef-ed out code.
	* ipa-free-lang-data.cc (free_lang_data_in_decl): Adjust code
	referencing declare_variant_alt bit.
	* ipa.cc (symbol_table::remove_unreachable_nodes): Likewise.
	* lto-cgraph.cc (lto_output_node): Remove references to deleted
	bits.
	(output_refs): Adjust code referencing declare_variant_alt bit.
	(input_overwrite_node): Remove references to deleted bits.
	(input_refs): Adjust code referencing declare_variant_alt bit.
	* lto-streamer-out.cc (lto_output): Likewise.
	* lto-streamer.h (omp_lto_output_declare_variant_alt): Delete.
	(omp_lto_input_declare_variant_alt): Delete.
	* omp-expand.cc (expand_omp_target): Use has_omp_variant_constructs
	bit to trigger pass_omp_device_lower instead of
	calls_declare_variant_alt.
	* omp-general.cc (struct omp_declare_variant_entry): Delete.
	(struct omp_declare_variant_base_entry): Delete.
	(struct omp_declare_variant_hasher): Delete.
	(omp_declare_variant_hasher::hash): Delete.
	(omp_declare_variant_hasher::equal): Delete.
	(omp_declare_variants): Delete.
	(omp_declare_variant_alt_hasher): Delete.
	(omp_declare_variant_alt_hasher::hash): Delete.
	(omp_declare_variant_alt_hasher::equal): Delete.
	(omp_declare_variant_alt): Delete.
	(omp_lto_output_declare_variant_alt): Delete.
	(omp_lto_input_declare_variant_alt): Delete.
	(includes): Delete unnecessary include of gt-omp-general.h.
	* omp-offload.cc (execute_omp_device_lower): Remove references
	to deleted bit.
	(pass_omp_device_lower::gate): Likewise.
	* omp-simd-clone.cc (simd_clone_create): Likewise.
	* passes.cc (ipa_write_summaries): Likeise.
	* symtab.cc (symtab_node::get_partitioning_class): Likewise.
	* tree-inline.cc (expand_call_inline): Likewise.
	(tree_function_versioning): Likewise.

gcc/lto/ChangeLog
	* lto-partition.cc (lto_balanced_map): Adjust code referencing
	deleted declare_variant_alt bit.

This patch reimplements the middle-end support for "declare variant"
and extends the resolution mechanism to also handle metadirectives
(PR112779).  It also adds partial support for dynamic selectors
(PR113904) and fixes a selector scoring bug reported as PR114596.  I hope
this rewrite also improves the engineering aspect of the code, e.g. more
comments to explain what it is doing.

In most cases, variant constructs can be resolved either in the front
end or during gimplification; if the variant with the highest score
has a static selector, then only that one is emitted.  In the case
where it has a dynamic selector, it is resolved into a (possibly nested)
if/then/else construct, testing the run-time predicate for each selector
sorted by decreasing order of score until a static selector is found.

In some cases, notably a variant construct in a "declare simd"
function which may or may not expand into a simd clone, it may not be
possible to score or sort the variants until later in compilation (the
ompdevlow pass).  In this case the gimplifier emits a loop containing
a switch statement with the variants in arbitrary order and uses the
OMP_NEXT_VARIANT tree node as a placeholder to control which variant
is tested on each iteration of the loop.  It looks something like:

     switch_var = OMP_NEXT_VARIANT (0, state);
     loop_label:
     switch (switch_var)
       {
       case 1:
        if (dynamic_selector_predicate_1)
          {
            alternative_1;
            goto end_label;
          }
        else
          {
            switch_var = OMP_NEXT_VARIANT (1, state);
            goto loop_label;
          }
       case 2:
         ...
       }
      end_label:

Note that when there are no dynamic selectors, the loop is unnecessary
and only the switch is emitted.

Finally, in the ompdevlow pass, the OMP_NEXT_VARIANT magic cookies are
resolved and replaced with constants.  When compiling with -O we can
expect that the loop and switch will be discarded by subsequent
optimizations and replaced with direct jumps between the cases,
eventually arriving at code with similar control flow to the
early-resolution cases.

This approach is somewhat simpler than the one currently used for
handling declare variant in that all possible code paths are already
included in the output of the gimplifier, so it is not necessary to
maintain hidden references or data structures pointing to expansions of
not-yet-resolved variant constructs and special logic for passing them
through LTO (see PR lto/96680).

A possible disadvantage of this expansion strategy is that dead code
for unused variants in the switch can remain when compiling without
-O.  If this turns out to be a critical problem (e.g., an unused case
includes calls to functions not available to the linker) perhaps some
further processing could be performed by default after ompdevlow to
simplify such constructs.

In order to make this patch more readable for review purposes, it
leaves the existing code for "declare variant" resolution (including
the above-mentioned LTO hack) in place, in some cases just ifdef-ing
out functions that won't compile due to changed interfaces for
dependencies.  The next patch in the series will delete all the
now-unused code.

gcc/ChangeLog
	PR middle-end/114596
	PR middle-end/112779
	PR middle-end/113904

	* Makefile.in (GTFILES): Move omp-general.h earlier; required
	because of moving score_wide_int declaration to that file.
	* cgraph.h (struct cgraph_node): Add has_omp_variant_constructs flag.
	* cgraphclones.cc (cgraph_node::create_clone): Propagate
	has_omp_variant_constructs flag.
	* gimplify.cc (omp_resolved_variant_calls): New.
	(expand_late_variant_directive): New.
	(find_supercontext): New.
	(gimplify_variant_call_expr): New.
	(gimplify_call_expr): Adjust parameters to make fallback available.
	Update processing for "declare variant" substitution.
	(is_gimple_stmt): Add OMP_METADIRECTIVE.
	(omp_construct_selector_matches): Ifdef out unused function.
	(omp_get_construct_context): New.
	(gimplify_omp_dispatch): Replace call to deleted function
	omp_resolve_declare_variant with equivalent logic.
	(expand_omp_metadirective): New.
	(expand_late_variant_directive): New.
	(gimplify_omp_metadirective): New.
	(gimplify_expr): Adjust arguments to gimplify_call_expr.  Add
	cases for OMP_METADIRECTIVE, OMP_NEXT_VARIANT, and
	OMP_TARGET_DEVICE_MATCHES.
	(gimplify_function_tree): Initialize/clean up
	omp_resolved_variant_calls.
	* gimplify.h (omp_construct_selector_matches): Delete declaration.
	(omp_get_construct_context): Declare.
	* lto-cgraph.cc (lto_output_node): Write has_omp_variant_constructs.
	(input_overwrite_node): Read has_omp_variant_constructs.
	* omp-builtins.def (BUILT_IN_OMP_GET_NUM_DEVICES): New.
	* omp-expand.cc (expand_omp_taskreg): Propagate
	has_omp_variant_constructs.
	(expand_omp_target): Likewise.
	* omp-general.cc (omp_maybe_offloaded): Add construct_context
	parameter; use it instead of querying gimplifier state.  Add
	comments.
	(omp_context_name_list_prop): Do not test lang_GNU_Fortran in
	offload compiler, just use the string as-is.
	(expr_uses_parm_decl): New.
	(omp_check_context_selector): Add metadirective_p parameter.
	Remove sorry for target_device selector.  Add additional checks
	specific to metadirective or declare variant.
	(make_omp_metadirective_variant): New.
	(omp_construct_traits_match): New.
	(omp_context_selector_matches): Temporarily ifdef out the previous
	code, and add a new implementation based on the old one with
	different parameters, some unnecessary loops removed, and code
	re-indented.
	(omp_target_device_matches_on_host): New.
	(resolve_omp_target_device_matches): New.
	(omp_construct_simd_compare): Support matching of "simdlen" and
	"aligned" clauses.
	(omp_context_selector_set_compare): Make static.  Adjust call to
	omp_construct_simd_compare.
	(score_wide_int): Move declaration to omp-general.h.
	(omp_selector_is_dynamic): New.
	(omp_device_num_check): New.
	(omp_dynamic_cond): New.
	(omp_context_compute_score): Ifdef out the old version and
	re-implement with different parameters.
	(omp_complete_construct_context): New.
	(omp_resolve_late_declare_variant): Ifdef out.
	(omp_declare_variant_remove_hook): Likewise.
	(omp_resolve_declare_variant): Likewise.
	(sort_variant): New.
	(omp_get_dynamic_candidates): New.
	(omp_declare_variant_candidates): New.
	(omp_metadirective_candidates): New.
	(omp_early_resolve_metadirective): New.
	(omp_resolve_variant_construct): New.
	* omp-general.h (score_wide_int): Moved here from omp-general.cc.
	(struct omp_variant): New.
	(make_omp_metadirective_variant): Declare.
	(omp_construct_traits_to_codes): Delete declaration.
	(omp_check_context_selector): Adjust parameters.
	(omp_context_selector_matches): Likewise.
	(omp_context_selector_set_compare): Delete declaration.
	(omp_resolve_declare_variant): Likewise.
	(omp_declare_variant_candidates): Declare.
	(omp_metadirective_candidates): Declare.
	(omp_get_dynamic_candidates): Declare.
	(omp_early_resolve_metadirective): Declare.
	(omp_resolve_variant_construct): Declare.
	(omp_dynamic_cond): Declare.
	* omp-offload.cc (resolve_omp_variant_cookies): New.
	(execute_omp_device_lower): Call the above function to resolve
	variant directives.  Remove call to omp_resolve_declare_variant.
	(pass_omp_device_lower::gate): Check has_omp_variant_construct bit.
	* omp-simd-clone.cc (simd_clone_create): Propagate
	has_omp_variant_constructs bit.
	* tree-inline.cc (expand_call_inline): Likewise.
	(tree_function_versioning): Likewise.

gcc/c/ChangeLog
	PR middle-end/114596
	PR middle-end/112779
	PR middle-end/113904
	* c-parser.cc (c_finish_omp_declare_variant): Update for changes
	to omp-general.h interfaces.

gcc/cp/ChangeLog
	PR middle-end/114596
	PR middle-end/112779
	PR middle-end/113904
	* decl.cc (omp_declare_variant_finalize_one): Update for changes
	to omp-general.h interfaces.
	* parser.cc (cp_finish_omp_declare_variant): Likewise.

gcc/fortran/ChangeLog
	PR middle-end/114596
	PR middle-end/112779
	PR middle-end/113904
	* trans-openmp.cc (gfc_trans_omp_declare_variant): Update for changes
	to omp-general.h interfaces.

gcc/testsuite/
	PR middle-end/114596
	PR middle-end/112779
	PR middle-end/113904
	* c-c++-common/gomp/declare-variant-12.c: Adjust expected behavior
	per PR114596.
	* c-c++-common/gomp/declare-variant-13.c: Test that this is resolvable
	after gimplification, not just final resolution.
	* c-c++-common/gomp/declare-variant-14.c: Tweak testcase to ensure
	that -O causes dead code to be optimized away.
	* gfortran.dg/gomp/declare-variant-12.f90: Adjust expected behavior
	per PR114596.
	* gfortran.dg/gomp/declare-variant-13.f90: Test that this is resolvable
	after gimplification, not just final resolution.
	* gfortran.dg/gomp/declare-variant-14.f90: Tweak testcase to ensure
	that -O	causes dead code to be optimized away.

Co-Authored-By: Kwok Cheung Yeung <kcy@codesourcery.com>
Co-Authored-By: Sandra Loosemore <sandra@codesourcery.com>
Co-Authored-By: Marcel Vollweiler <marcel@codesourcery.com>

This patch adds basic support for three new tree node types that will
be used in subsequent patches to support OpenMP metadirectives and
dynamic selectors.

OMP_METADIRECTIVE is the internal representation of parsed OpenMP
metadirective constructs.  It's produced by the front ends and is expanded
during gimplification.

OMP_NEXT_VARIANT is used as a "magic cookie" for late resolution of
variant constructs that cannot be fully resolved during
gimplification, used to set the controlling variable of a switch
statement that branches to the next alternative once the candidate
list can be filtered and sorted.  These nodes are expanded into
constants in the ompdevlow pass.  In some gimple passes, they need to
be treated as constants.

OMP_TARGET_DEVICE_MATCHES is a similar "magic cookie" used to resolve
the target_device dynamic selector.  It is wrapped in an OpenMP target
construct, and can be resolved to a constant in the ompdevlow pass.

gcc/ChangeLog:
	* doc/generic.texi (OpenMP): Document OMP_METADIRECTIVE,
	OMP_NEXT_VARIANT, and OMP_TARGET_DEVICE_MATCHES.
	* fold-const.cc (operand_compare::hash_operand): Ignore
	the new nodes.
	* gimple-expr.cc (is_gimple_val): Allow OMP_NEXT_VARIANT
	and OMP_TARGET_DEVICE_MATCHES.
	* gimple.cc (get_gimple_rhs_num_ops): OMP_NEXT_VARIANT and
	OMP_TARGET_DEVICE_MATCHES are both GIMPLE_SINGLE_RHS.
	* tree-cfg.cc (tree_node_can_be_shared): Allow sharing of
	OMP_NEXT_VARIANT.
	* tree-inline.cc (remap_gimple_op_r): Ignore subtrees of
	OMP_NEXT_VARIANT.
	* tree-pretty-print.cc (dump_generic_node): Handle OMP_METADIRECTIVE,
	OMP_NEXT_VARIANT, and OMP_TARGET_DEVICE_MATCHES.
	* tree-ssa-operands.cc (operands_scanner::get_expr_operands):
	Ignore operands of OMP_NEXT_VARIANT and OMP_TARGET_DEVICE_MATCHES.
	* tree.def (OMP_METADIRECTIVE): New.
	(OMP_NEXT_VARIANT): New.
	(OMP_TARGET_DEVICE_MATCHES): New.
	* tree.h (OMP_METADIRECTIVE_VARIANTS): New.
	(OMP_METADIRECTIVE_VARIANT_SELECTOR): New.
	(OMP_METADIRECTIVE_VARIANT_DIRECTIVE): New.
	(OMP_METADIRECTIVE_VARIANT_BODY): New.
	(OMP_NEXT_VARIANT_INDEX): New.
	(OMP_NEXT_VARIANT_STATE): New.
	(OMP_TARGET_DEVICE_MATCHES_SELECTOR): New.
	(OMP_TARGET_DEVICE_MATCHES_PROPERTIES): New.

Co-Authored-By: Kwok Cheung Yeung <kcy@codesourcery.com>
Co-Authored-By: Sandra Loosemore <sandra@codesourcery.com>

Add logic to check and extend constants compared with bitfields, so
that fields are only compared with constants they could actually
equal.  This involves making sure the signedness doesn't change
between loads and conversions before shifts: we'd need to carry a lot
more data to deal with all the possibilities.


for  gcc/ChangeLog

	PR tree-optimization/118456
	* gimple-fold.cc (decode_field_reference): Punt if shifting
	after changing signedness.
	(fold_truth_andor_for_ifcombine): Check extension bits in
	constants before clipping.

for  gcc/testsuite/ChangeLog

	PR tree-optimization/118456
	* gcc.dg/field-merge-21.c: New.
	* gcc.dg/field-merge-22.c: New.

In PR118154 we emit strided stores but the first of those does not
always have the proper VTYPE.  That's because we erroneously delete
a necessary vsetvl.

In order to determine whether to elide

(1)
      Expr[7]: VALID (insn 116, bb 17)
        Demand fields: demand_ratio_and_ge_sew demand_avl
        SEW=8, VLMUL=mf2, RATIO=16, MAX_SEW=64
        TAIL_POLICY=agnostic, MASK_POLICY=agnostic
        AVL=(reg:DI 0 zero)

when e.g.

(2)
      Expr[3]: VALID (insn 360, bb 15)
        Demand fields: demand_sew_lmul demand_avl
        SEW=64, VLMUL=m1, RATIO=64, MAX_SEW=64
        TAIL_POLICY=agnostic, MASK_POLICY=agnostic
        AVL=(reg:DI 0 zero)
        VL=(reg:DI 13 a3 [345])

is already available, we use
sew_ge_and_prev_sew_le_next_max_sew_and_next_ratio_valid_for_prev_sew_p.

(1) requires RATIO = SEW/LMUL = 16 and an SEW >= 8.  (2) has ratio = 64,
though, so we cannot directly elide (1).

This patch uses ratio_eq_p instead of next_ratio_valid_for_prev_sew_p.

	PR target/118154

gcc/ChangeLog:

	* config/riscv/riscv-vsetvl.cc (MAX_LMUL): New define.
	(pre_vsetvl::earliest_fuse_vsetvl_info): Use.
	(pre_vsetvl::pre_global_vsetvl_info): New predicate with equal
	ratio.
	* config/riscv/riscv-vsetvl.def: Use.

gcc/testsuite/ChangeLog:

	* gcc.target/riscv/rvv/autovec/pr118154-1.c: New test.
	* gcc.target/riscv/rvv/autovec/pr118154-2.c: New test.

In PR118140 we simplify

  _ifc__33 = .COND_IOR (_41, d_lsm.7_11, _46, d_lsm.7_11);

to 1:

Match-and-simplified .COND_IOR (_41, d_lsm.7_11, _46, d_lsm.7_11) to 1

when _46 == 1.  This happens by removing the conditional and applying
a | 1 = 1.  Normally we re-introduce the conditional and its else value
if needed but that does not happen here as we're not dealing with a
vector type.  For correctness's sake, we must not remove the conditional
even for non-vector types.

This patch re-introduces a COND_EXPR in such cases.  For PR118140 this
result in a non-vectorized loop.

	PR middle-end/118140

gcc/ChangeLog:

	* gimple-match-exports.cc (maybe_resimplify_conditional_op): Add
	COND_EXPR when we simplified to a scalar gimple value but still
	have an else value.

gcc/testsuite/ChangeLog:

	* gcc.dg/vect/pr118140.c: New test.
	* gcc.target/riscv/rvv/autovec/pr118140.c: New test.

The ICE in the linked PR is caused because name lookup finds duplicate
copies of the deduction guides, causing a checking assert to fail.

This is ultimately because we're exporting an imported guide; when name
lookup processes 'dguide-5_b.H' it goes via the 'tt_entity' path and
just returns the entity from 'dguide-5_a.H'.  Because this doesn't ever
go through 'key_mergeable' we never set 'BINDING_VECTOR_GLOBAL_DUPS_P'
and so deduping is not engaged, allowing duplicate results.

Currently I believe this to be a perculiarity of the ANY_REACHABLE
handling for deduction guides; in no other case that I can find do we
emit bindings purely to imported entities.  As such, this patch fixes
this problem from that end, by ensuring that we simply do not emit any
imported deduction guides.  This avoids the ICE because no duplicates
need deduping to start with, and should otherwise have no functional
change because lookup of deduction guides will look at all reachable
modules (exported or not) regardless.

Since we're now deliberately not emitting imported deduction guides we
can use LOOK_want::NORMAL instead of LOOK_want::ANY_REACHABLE, since the
extra work to find as-yet undiscovered deduction guides in transitive
importers is not necessary here.

	PR c++/117397

gcc/cp/ChangeLog:

	* module.cc (depset::hash::add_deduction_guides): Don't emit
	imported deduction guides.
	(depset::hash::finalize_dependencies): Add check for any
	bindings referring to imported entities.

gcc/testsuite/ChangeLog:

	* g++.dg/modules/dguide-5_a.H: New test.
	* g++.dg/modules/dguide-5_b.H: New test.
	* g++.dg/modules/dguide-5_c.H: New test.
	* g++.dg/modules/dguide-6.h: New test.
	* g++.dg/modules/dguide-6_a.C: New test.
	* g++.dg/modules/dguide-6_b.C: New test.
	* g++.dg/modules/dguide-6_c.C: New test.

Signed-off-by: Nathaniel Shead <nathanieloshead@gmail.com>
Reviewed-by: Jason Merrill <jason@redhat.com>

...to the object file reader present in the run-time library.

gcc/ada/
	PR ada/118459
	* libgnat/s-objrea.ads (Object_Arch): Add S390 and RISCV.
	* libgnat/s-objrea.adb (EM_S390): New named number.
	(EM_RISCV): Likewise.
	(ELF_Ops.Initialize): Deal with EM_S390 and EM_RISCV.
	(Read_Address): Deal with S390 and RISCV.

When vectorizing a load we are now checking alignment before emitting
a vector(1) T load instead of blindly assuming it's OK when we had
a scalar T load.  For reasons we're not handling alignment computation
optimally here but we shouldn't ICE when we fall back to loads of T.

The following ensures the IL remains correct by emitting VIEW_CONVERT
from T to vector(1) T when needed.  It also removes an earlier fix
done in r9-382-gbb4e47476537f6 for the same issue with VMAT_ELEMENTWISE.

	PR tree-optimization/118405
	* tree-vect-stmts.cc (vectorizable_load): When we fall back
	to scalar loads make sure we properly convert to vector(1) T
	when there was only a single vector element.

	This patch provided by Anuj Mohite as part of the GSoC project.
	It is modified slightly by Jerry DeLisle for minor formatting.
	The patch provides front-end parsing of the LOCALITY specs in
	DO_CONCURRENT and adds numerous test cases.

gcc/fortran/ChangeLog:

	* dump-parse-tree.cc (show_code_node):  Updated to use
	c->ext.concur.forall_iterator instead of c->ext.forall_iterator.
	* frontend-passes.cc (index_interchange): Updated to
	use c->ext.concur.forall_iterator instead of c->ext.forall_iterator.
	(gfc_code_walker): Likewise.
	* gfortran.h (enum locality_type): Added new enum for locality types
	in DO CONCURRENT constructs.
	* match.cc (match_simple_forall): Updated to use
	new_st.ext.concur.forall_iterator instead of new_st.ext.forall_iterator.
	(gfc_match_forall): Likewise.
	(gfc_match_do):  Implemented support for matching DO CONCURRENT locality
	specifiers (LOCAL, LOCAL_INIT, SHARED, DEFAULT(NONE), and REDUCE).
	* parse.cc (parse_do_block): Updated to use
	new_st.ext.concur.forall_iterator instead of new_st.ext.forall_iterator.
	* resolve.cc (struct check_default_none_data): Added struct
	check_default_none_data.
	(do_concur_locality_specs_f2023): New function to check compliance
	with F2023's C1133 constraint for DO CONCURRENT.
	(check_default_none_expr): New function to check DEFAULT(NONE)
	compliance.
	(resolve_locality_spec): New function to resolve locality specs.
	(gfc_count_forall_iterators): Updated to use
	code->ext.concur.forall_iterator.
	(gfc_resolve_forall): Updated to use code->ext.concur.forall_iterator.
	* st.cc (gfc_free_statement): Updated to free locality specifications
	and use p->ext.concur.forall_iterator.
	* trans-stmt.cc (gfc_trans_forall_1): Updated to use
	code->ext.concur.forall_iterator.

gcc/testsuite/ChangeLog:

	* gfortran.dg/do_concurrent_10.f90: New test.
	* gfortran.dg/do_concurrent_8_f2018.f90: New test.
	* gfortran.dg/do_concurrent_8_f2023.f90: New test.
	* gfortran.dg/do_concurrent_9.f90: New test.
	* gfortran.dg/do_concurrent_all_clauses.f90: New test.
	* gfortran.dg/do_concurrent_basic.f90: New test.
	* gfortran.dg/do_concurrent_constraints.f90: New test.
	* gfortran.dg/do_concurrent_local_init.f90: New test.
	* gfortran.dg/do_concurrent_locality_specs.f90: New test.
	* gfortran.dg/do_concurrent_multiple_reduce.f90: New test.
	* gfortran.dg/do_concurrent_nested.f90: New test.
	* gfortran.dg/do_concurrent_parser.f90: New test.
	* gfortran.dg/do_concurrent_reduce_max.f90: New test.
	* gfortran.dg/do_concurrent_reduce_sum.f90: New test.
	* gfortran.dg/do_concurrent_shared.f90: New test.

Signed-off-by: Anuj <anujmohite001@gmail.com>