When memchr is applied on a constant string of no more than the bytes of
a word, simplify memchr by checking each byte in the constant string.

int f (int a)
{
   return  __builtin_memchr ("AE", a, 2) != 0;
}

is simplified to

int f (int a)
{
  return ((char) a == 'A' || (char) a == 'E') != 0;
}

gcc/

	PR tree-optimization/103798
	* tree-ssa-forwprop.cc: Include "tree-ssa-strlen.h".
	(simplify_builtin_call): Inline memchr with constant strings of
	no more than the bytes of a word.
	* tree-ssa-strlen.cc (use_in_zero_equality): Make it global.
	* tree-ssa-strlen.h (use_in_zero_equality): New.

gcc/testsuite/

	PR tree-optimization/103798
	* c-c++-common/pr103798-1.c: New test.
	* c-c++-common/pr103798-2.c: Likewise.
	* c-c++-common/pr103798-3.c: Likewise.
	* c-c++-common/pr103798-4.c: Likewise.
	* c-c++-common/pr103798-5.c: Likewise.
	* c-c++-common/pr103798-6.c: Likewise.
	* c-c++-common/pr103798-7.c: Likewise.
	* c-c++-common/pr103798-8.c: Likewise.
	* c-c++-common/pr103798-9.c: Likewise.
	* c-c++-common/pr103798-10.c: Likewise.

gcc/fortran/ChangeLog:

	PR fortran/106209
	* decl.cc (add_init_expr_to_sym): Handle bad initializers for
	implied-shape arrays.

gcc/testsuite/ChangeLog:

	PR fortran/106209
	* gfortran.dg/pr106209.f90: New test.

Co-authored-by: Steven G. Kargl <kargl@gcc.gnu.org>

gcc/jit/ChangeLog:

	* jit-recording.h (recording::memento): Define copy constructor
	and copy assignment operator as deleted.
	(recording::string): Likewise.
	(recording::string::c_str): Add const qualifier.

Use -pthread only if we are going to use pthread functionality.

	PR bootstrap/106156

lto-plugin/ChangeLog:

	* Makefile.am: Use ac_lto_plugin_extra_ldflags for AM_LDFLAGS.
	* configure.ac: Use AC_SUBST(ac_lto_plugin_extra_ldflags).
	* Makefile.in: Regenerate.
	* configure: Regenerate.

This happens from prepare_gimple_addressable for the variable to be marked
with DECL_NOT_GIMPLE_REG_P when its initialization is gimplified, so it's
apparently just a matter of setting the flag earlier.

gcc/
	* gimplify.cc (lookup_tmp_var): Add NOT_GIMPLE_REG boolean parameter
	and set DECL_NOT_GIMPLE_REG_P on the variable according to it.
	(internal_get_tmp_var): Add NOT_GIMPLE_REG boolean parameter and
	pass it in the call to lookup_tmp_var.
	(get_formal_tmp_var): Pass false in the call to lookup_tmp_var.
	(get_initialized_tmp_var): Likewise.
	(prepare_gimple_addressable): Call internal_get_tmp_var instead of
	get_initialized_tmp_var with NOT_GIMPLE_REG set to true.

gcc/testsuite/
	* gnat.dg/opt98.ads, gnat.dg/opt98.adb: New test.

libiberty/ChangeLog:

	* functions.texi: Replace strtoul with strtoull.

gcc/ChangeLog:

	* doc/gimple.texi: Close properly a deftypefn.

gcc/ChangeLog:

	* doc/gimple.texi: Close properly a deftypefn.

This patch fixes an non-fatal issue about negative constant values derived
from FP constant synthesis on hosts whose 'long' is wider than 'int32_t'.

And also replaces the dedicated code in FP constant synthesis split
pattern with the appropriate existing function call.

gcc/ChangeLog:

	* config/xtensa/xtensa.md:
	In FP constant synthesis split pattern, subcontract to
	avoid_constant_pool_reference() as in the case of integer,
	because it can handle well too.  And cast to int32_t before
	calling xtensa_constantsynth() in order to ignore upper 32-bit.

gcc/testsuite/ChangeLog:

	* gcc.target/xtensa/constsynth_double.c:
	Modify in order to catch the issue.

std::move in a return statement can prevent the NRVO:
<https://developers.redhat.com/blog/2019/04/12/understanding-when-not-to-stdmove-in-c>

PR106272 reports that we have two such cases in class label_text's
member functions.  We have -Wpessimizing-move that's supposed to detect
problematic std::move uses, but in this case it didn't trigger.  I've filed
PR106276 to track that.

	PR preprocessor/106272

libcpp/ChangeLog:

	* include/line-map.h (class label_text): Don't std::move in a return
	statement.

Here we're crashing when substituting a non-dependent call to a
consteval operator, whose CALL_EXPR_OPERATOR_SYNTAX flag we try to
propagate to the result, but the result isn't a CALL_EXPR since the
selected function is consteval.  This patch fixes this by checking the
result of extract_call_expr accordingly.  (Note that we can't check
DECL_IMMEDIATE_FUNCTION_P here because we don't know which function was
selected by overload resolution from here.)

	PR c++/105912

gcc/cp/ChangeLog:

	* pt.cc (tsubst_copy_and_build) <case CALL_EXPR>: Guard against
	NULL_TREE extract_call_expr result.

gcc/testsuite/ChangeLog:

	* g++.dg/cpp2a/consteval31.C: New test.

Here we incorrectly deem the calls to func1, func2 and tmpl2 as
ambiguous ahead of time ultimately because we mishandle dependence
of a constrained member function from the current instantiation.

In type_dependent_expression_p, we already consider dependence of a
TEMPLATE_DECL's constraints (via uses_outer_template_parms), but
neglect to do the same for a FUNCTION_DECL (such as that for func1).

And in satisfy_declaration_constraints, we give up if _any_ template
argument is dependent, but for non-dependent member functions from
the current instantiation (such as func2 and tmpl2), we can and must
check constraints as long as the innermost arguments aren't dependent.

	PR c++/105842

gcc/cp/ChangeLog:

	* constraint.cc (satisfy_declaration_constraints): Refine early
	exit test for argument dependence.
	* cp-tree.h (uses_outer_template_parms_in_constraints): Declare.
	* pt.cc (template_class_depth): Handle TI_TEMPLATE being a
	FIELD_DECL.
	(usse_outer_template_parms): Factor out constraint dependence
	test into ...
	(uses_outer_template_parms_in_constraints): ... here.
	(type_dependent_expression_p): Use it for FUNCTION_DECL.

gcc/testsuite/ChangeLog:

	* g++.dg/cpp2a/concepts-memtmpl6.C: New test.

Removing this doesn't change anything at least with glibc 2.33.
The include was added in https://go.dev/cl/6100049 but it's not
clear why.

Fixes PR go/106266

Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/417294

For a signed integer, x < 0 is false if the sign bit in the nonzero
bits of X is clear.

Both CCP and ipa-cp can set the global nonzero bits in a range, which
means we can now use some of that information in evrp and subsequent
passes.  I've adjusted two tests which now fold things earlier because
of this optimization.

Tested on x86-64 Linux.

gcc/ChangeLog:

	* range-op.cc (operator_lt::fold_range): Use nonzero bits.

gcc/testsuite/ChangeLog:

	* g++.dg/ipa/pure-const-3.C: Adjust.
	* gcc.dg/pr102983.c: Adjust.

Every time we set a range we should take into account the nonzero
mask.  This happens automatically for the set() methods, plus all the
other assignment, intersect, and union methods.  Unfortunately I
forgot about the invert code.

Also, for good measure I audited the rest of the setters in
value_range.cc and plugged the legacy code to pessimize the masks to
-1 for union/intersect, since we don't support the masks on them (or
rather, we don't keep very good track of them).

Tested on x86-64 Linux.

gcc/ChangeLog:

	* value-range.cc (irange::copy_to_legacy): Set nonzero mask.
	(irange::legacy_intersect): Clear nonzero mask.
	(irange::legacy_union): Same.
	(irange::invert): Same.

The following gets away computing a dominance bitmap when
fast queries are not available and we are doing
back_propagate_equivalences.  The comuted bitmap can be
cheaply kept up-to-date during the domwalk since it is
simply the set of blocks on the domwalk stack.

Abstraction of the threading makes this somewhat awkward
but it also fulfills the fixme comment in only considering
equivalences in already (domwalk) visited blocks, even when
querying from the outgoing block of a forward thread.  Maybe
that's not what is intended but at least we have no testsuite
coverage of such missed equivalences.

	* tree-ssa-dom.h (record_temporary_equivalences): Remove.
	* tree-ssa-dom.cc (dom_jt_state::m_blocks_on_stack): New.
	(dom_jt_state::get_blocks_on_stack): Likewise.
	(dom_opt_dom_walker::dom_opt_dom_walker): Take dom_jt_state.
	(back_propagate_equivalences): Remove dominator bitmap
	compute and instead use passed in m_blocks_on_stack.
	(record_temporary_equivalences): Likewise.
	(record_equivalences_from_incoming_edge): Likewise.
	(dom_opt_dom_walker::before_dom_children): Maintain and
	pass down blocks on stack.
	(dom_opt_dom_walker::after_dom_children): Likewise.

gcc/ada/

	* gcc-interface/trans.cc (gnat_to_gnu) <N_Assignment_Statement>: Fix
	a couple of minor issues in the commentary.

This reports violations for 4 units from gigi.

gcc/ada/

	* gcc-interface/trans.cc (gigi): Report a violation of No_Dependence
	on System.Stack_Checking if Stack_Check_Probes_On_Target is not set
	and -fstack-check is specified.
	(build_binary_op_trapv): Report violatiosn of No_Dependence on both
	System.Arith_64 and System.Arith_128.
	(add_decl_expr): If an initialized variable, report a violation of
	No_Dependence on System.Memory_Copy for large aggregate types.
	(gnat_to_gnu) <N_Op_Eq>: Report a violation
	of No_Dependence on System.Memory_Compare for large aggregate types.
	<N_Assignment_Statement>! Report a violation of No_Dependence on
	System.Memory_Set, System.Memory_Move or else System.Memory_Copy for
	large aggregate types.
	* gcc-interface/utils2.cc (maybe_wrap_malloc): Report a violation of
	No_Dependence on System.Memory.
	(maybe_wrap_free): Add GNAT_NODE parameter and report a violation of
	No_Dependence on System.Memory.
	(build_call_alloc_dealloc): Adjust call to maybe_wrap_free.

It lost too much useful information.

gcc/ada/

	* gcc-interface/decl.cc (gnat_to_gnu_entity): Do not set the debug
	type for vector types.

gcc/ada/

	* gcc-interface/decl.cc (gnat_to_gnu_entity) <E_Access_Subtype>:
	Undo questionable renaming.

gcc/ada/

	* gcc-interface/decl.cc (Gigi_Cloned_Subtype): Handle private case.

gcc/ada/

	* gcc-interface/trans.cc (gigi): Add one more leading underscore to
	name of stack checking function.

This makes sure that the objects present in instantiations always have the
actual type instead of a local variant of the formal type in the debugging
information generated by the compiler (this was already the case when the
actual type is a record, a protected or a task type).

gcc/ada/

	* gcc-interface/decl.cc (Gigi_Cloned_Subtype): New function.
	(gnat_to_gnu_entity) <E_Signed_Integer_Subtype>: Call it to get the
	cloned subtype, if any.
	<E_Floating_Point_Subtype>: Likewise.
	<E_Array_Subtype>: Likewise.
	<E_Record_Subtype>: Likewise.
	<E_Access_Subtype>: Likewise.
	Deal with all cloned subtypes on the main path.

This is consistent with the other kinds of subtypes.

gcc/ada/

	* gcc-interface/decl.cc (gnat_to_gnu_entity) <E_Access_Subtype>: Do
	not reuse the TYPE_DECL of the base type.

It no longer serves any useful purpose at this point.

gcc/ada/

	* gcc-interface/utils.cc (gnat_pushdecl): Build DECL_ORIGINAL_TYPE
	only for pointer types.

It comes from an overzealous assertion.

gcc/ada/

	* gcc-interface/utils2.cc (build_binary_op) <EQ_EXPR>: Also accept
	pointer-to-function types that are not variant of each other.

This happens when there is a size mismatch, but this must be accepted.

gcc/ada/

	* gcc-interface/utils.cc (unchecked_convert): Also pad in most cases
	if the source is not a scalar type but the destination is.

The current implementation may create dangling references from a superset
of the alias set of the dummy pointer-to-array type when it exists.

gcc/ada/

	* gcc-interface/decl.cc (gnat_to_gnu_entity) <E_Array_Type>: Save
	and restore the alias set of the dummy pointer-to-array type.

gcc/ada/

	* snames.ads-tmpl (Name_Memory_Compare): New package name.
	(Name_Memory_Copy): Likewise.
	(Name_Memory_Move): Likewise.
	(Name_Memory_Set): Likewise.

gcc/ada/

	* sem_ch13.adb (Check_And_Resolve_Storage_Model_Type_Argument):
	Call the System.Case_Util.To_Mixed procedure rather than the
	function, to avoid bootstrap problems.

The compiler currently rejects a Storage_Model_Type aspect that is not
specified with an aggregate, or that has an aggregate that does not
specify all defined "subaspects" (Address_Type, Null_Address, Allocate,
etc.). The RFC for this feature defines the aspect to fully default to
the native memory model when no aggregate is given, and also allows any
subaspects to be specified and others to default in the case where the
address type is the native address type (System.Address), whether that
address type is explicitly specified or defaulted. This set of changes
now supports that defaulting semantics. Note that the subaspect
retrieval functions in Sem_Util.Storage_Model_Support (which are called
by the compiler back ends) will now return Empty for any subprogram
subaspects (Allocate, Deallocate, etc.) that are defaulted in the aspect
(that is, in the native model case where the address type is
System.Address).  Also in the native case, retrieval of defaulted
subaspects Address_Type and Null_Address will return the entities for
System.Address and System.Null_Address, respectively. Additionally,
error checks for multiple associations given for the same subaspect are
now done.

gcc/ada/

	* aspects.ads (Aspect_Argument): Change the association for
	Aspect_Storage_Model_Type from Expression to
	Optional_Expression.
	* exp_util.ads (Find_Storage_Op): Update comment to indicate
	that Empty can be returned in the case where a storage-model
	operation is defaulted.
	* exp_util.adb (Find_Storage_Op): Allow the function to return
	Empty in Storage_Model_Type case rather than raising
	Program_Error, so that Procedure_To_Call fields in N_Allocator
	and N_Free_Statement nodes will be set to Empty in the defaulted
	native storage-model case.
	* sem_ch13.adb: Add with and use of System.Case_Util (and
	reformat context_clause).
	(Check_Aspect_At_Freeze_Point): Return with no action for a
	Storage_Model_Type aspect with no expression (fully-defaulted
	native memory-model case).
	(Resolve_Storage_Model_Type_Argument): If an Address_Type has
	not been explicitly specified, then set Addr_Type to denote type
	System.Address.
	(Validate_Storage_Model_Type_Aspect): Return immediately in the
	case where the aspect has no Expression (fully-defaulted native
	memory-model case).  No longer issue an error when Address_Type
	isn't specified, and instead use type System.Address as the
	default address type. When the address type is
	System.Address (whether specified or defaulted), no longer issue
	errors for any other "subaspects" that aren't specified, since
	in that case those are allowed to default as well. Remove ???
	comment about needing to check for duplicates, which is now
	addressed.
	(Check_And_Resolve_Storage_Model_Type_Argument): New procedure
	to check that an association for a storage-model subaspect in
	the aggregate has not been specified earlier in the aggregate,
	and to then resolve the expression of the association and save
	the resolved entity. Called by
	Validate_Storage_Model_Type_Aspect.
	* sem_util.ads (Storage_Model_Support): Update comments on specs
	of the functions Get_Storage_Model_Type_Entity,
	Storage_Model_Address_Type, and Storage_Model_Null_Address to
	indicate the behavior when the address type is System.Address
	(the native memory-model case).
	* sem_util.adb
	(Storage_Model_Support.Get_Storage_Model_Type_Entity): Suppress
	the search for the given subaspect name (Nam) when the
	Storage_Model_Type aspect is fully defaulted (i.e., no
	Expression is present) and simply return. In cases where the
	search is done, but no association that matches Nam is found,
	return System.Address for the Name_Address_Type case, return
	System.Null_Address for the Name_Null_Address case, and return
	Empty for all other cases.

When a generic unit contains references to global entities (i.e.
entities declared outside of this generic unit), those references are
saved: from the analyzed copy of a generic unit (which is then
discarded) into a generic template (which is then instantiated, possibly
many times). To save those references we maintain an association from
nodes in the generic template to nodes in the analyzed copy. However,
this association breaks when analysis of the generic copy calls
Relocate_Node, which conceptually only moves the node, while in fact it
creates a copy with a new Node_Id.

In particular, this association was broken by calls to Relocate_Node
that happen when transforming various aspects into corresponding pragmas
or attribute definition clases. For the most common Pre and Post aspects
this was fixed years ago by not using Relocate_Node and simply sharing
the tree.  This patch extends this fix to other aspects, in particular
those that allow non-static expressions.

gcc/ada/

	* sem_ch13.adb (Relocate_Expression): New routine with code that
	previously was only applied to Pre and Post aspects.
	(Analyze_Aspect_Specifications): Apply the above routine to
	other aspects, in particular to aspects Address, Attach_Handler,
	Predicate and Interrupt_Priority.

Originally bodies-to-inline created for the frontend inlining were
analyzed with expansion disabled. Then, to facilitate inlining in
GNATprove mode, the analysis was changed to preanalysis.

However, preanalysis in this context works badly for calls in prefix
notation, because preanalysis assigns entities and types to nodes but
doesn't convert calls from prefix to ordinary notation. When the
body-to-inline is actually inlined, the (re)analysis of calls in prefix
notation fails.

The proper solution is rather to handle bodies-to-inline just like
generic templates.

From the user point of view, this patch fixes spurious errors both in
GNATprove (which uses frontend inlining by default) and in GNAT (where
frontend inlining is typically explicitly requested with -gnatN and
pragma Inline_Always).

gcc/ada/

	* inline.adb (Build_Body_To_Inline): Instead of manipulating the
	Full_Analysis flag, use the Inside_A_Generic flag (which is
	conveniently manipulated by Start_Generic/End_Generic, together
	with Expander_Active).
	* sem_attr.adb (Analyze_Attribute_Old_Result): Adapt comment and
	assertion to different flag that is set while building
	body-to-inline.

Prefixes -fzero-call-used-regs and -fstrub could be mistaken for full
command-line options with the references to them in the GNAT RM.  Make
it clearer that they require explicit choices.

gcc/ada/

	* doc/gnat_rm/security_hardening_features.rst: Clarify the need
	for choices after -fzero-call-used-regs and -fstrub.
	* gnat_rm.texi: Regenerate.

When a formal generic type is marked as Ghost, the instantiation of that
generic will contain a generic subtype for the actual with the Ghost
pragma. Recognize this case.

gcc/ada/

	* sem_prag.adb (Analyze_Pragma): Recognize a generated subtype
	with Ghost pragma for generic instantiations.

After changes in provers and Why3, changes are needed to recover
automatic proof of System.Arith_64. This is the first part of it.

gcc/ada/

	* libgnat/s-aridou.adb (Lemma_Mult_Div, Lemma_Powers): New
	lemmas.
	(Prove_Sign_Quotient): New local lemma.
	(Prove_Signs): Expand definition of Big_R and Big_Q in the
	postcondition. Add intermediate assertions.
	(Double_Divide): Call new lemma.
	(Lemma_Div_Eq): Provide body for proving lemma.
	(Lemma_Powers_Of_2, Lemma_Shift_Without_Drop,
	Prove_Dividend_Scaling, Prove_Multiplication, Prove_Z_Low): Call
	lemmas, add intermediate assertions.

When examining expression of the first declaration of the inlined body
make sure that this declaration is in fact an object declaration.

gcc/ada/

	* inline.adb (Has_Single_Return): Add guard for the subsequent
	call to Expression.

In Ada 2012, the RM 4.5.2(9.8) clause prevents an equality operator for an
untagged record type from being declared after the type is frozen.  While
the clause is implemented in GNAT, the implementation has a loophole which
lets subprogram bodies that are not the completion of a declaration pass
the check without being flagged.

gcc/ada/

	* sem_ch6.adb (Analyze_Subprogram_Body_Helper): Set Acts_As_Spec
	earlier if the body is not the completion of a declaration.
	(Check_Untagged_Equality): Deal with subprogram bodies that are
	not the completion of a declaration and make sure that they are
	not flagged when they cause the freezing of the type themselves.
	Give a warning on the freezing point of the type in more cases.
	* sem_res.adb (Resolve_Equality_Op): Revert latest change.

gcc/ada/

	* libgnat/s-arit32.adb (Scaled_Divide32): Add an assertion, move
	the call of Prove_Sign_R around.