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gcc/ada/
* gcc-interface/decl.cc (gnat_to_gnu_entity) <E_Constant>: Deal with
a constant related to a return in a function specially.
* gcc-interface/trans.cc (Call_to_gnu): Use return slot optimization
if the target is a return object.
(gnat_to_gnu) <N_Object_Declaration>: Deal with a constant related
to a return in a function specially.
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The rationale is that these entities are almost always the result of
expansion activities in the front-end, over which the user has very
limited control. These warnings can be restored by means of -gnatD.
gcc/ada/
* gcc-interface/utils.cc (gnat_pushdecl): Also set TREE_NO_WARNING
on the decl if Comes_From_Source is false for the associated node.
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This alphabetizes the large switch statement, removes a useless nested
switch statement, an artificial fall through and adds a default return.
No functional changes.
gcc/ada/
* gcc-interface/trans.cc (gnat_gimplify_expr): Tidy up.
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gcc/ada/
* gcc-interface/decl.cc (gnat_to_gnu_entity) <E_Function>: Also call
process_attributes for built-in functions.
(prepend_one_attribute_pragma): Deal with "simd" attribute.
* gcc-interface/utils.cc (handle_simd_attribute): New function.
(gnat_internal_attribute_table): Add entry for "simd" attribute.
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The issue arises when the unchecked union contains both a fixed part and
a variant part, and is subject to a full representation clause covering
all the components in all the variants, when the component clauses do not
align the variant boundaries with byte boundaries consistently.
gcc/ada/
* gcc-interface/decl.cc (components_to_record): Use NULL recursively
as P_GNU_REP_LIST for the innermost variant level in the unchecked
union case with a fixed part.
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The message "No source file position information available" is displayed
in the bugbox when Current_Error_Node has no location, which is useless.
gcc/ada/
* gcc-interface/trans.cc (gnat_to_gnu): Do not set Current_Error_Node
to a node without location.
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The front-end properly computes a linear elaboration order for them, but
there was a loophole in the handling of the delayed case.
gcc/ada/
* gcc-interface/decl.cc (gnat_to_gnu_entity) <E_Access_Subtype>: And
skip the elaboration of the designated subtype when that of its base
type has been delayed.
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This creates a couple of record subtypes pointing to each other through
access subtypes, and we break the circularity at the latter subtypes.
gcc/ada/
* gcc-interface/decl.cc (gnat_to_gnu_entity) <E_Record_Subtype>: If
it is a special subtype designated by an access subtype, then defer
the completion of incomplete types.
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gcc/ada/
* gcc-interface/ada-tree.h, gcc-interface/ada.h,
gcc-interface/gadaint.h, gcc-interface/targtyps.cc: Adjust
copyright line.
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This makes it possible to pass the result to a C function directly.
gcc/ada/
* gcc-interface/utils.cc (unchecked_convert): Do not fold a string
constant if the target type is pointer to character.
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We flag illegal pragma Elaborate with a call to Error_Msg on the pragma
argument, which in turn calls Set_Error_Posted on the enclosing
statement, i.e. on the pragma itself. The explicit call to
Set_Error_Posted on the pragma itself was redundant.
Cleanup related to handling of illegal code when detecting uninitialized
scalar objects.
gcc/ada/
* sem_prag.adb (Analyze_Pragma): Remove redundant call to
Set_Error_Posted.
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When resolution of an expanded name fails, we call routine
Error_Missing_With_Of_Known_Unit which emits an error continuation
message (i.e. an error string starting with \\). However, for error
continuations to work properly there must be some prior error, because
continuation itself doesn't set flags like Serious_Errors_Detected.
Without these flags the problematic statement is not marked with
Error_Posted, which in turn is needed to prevent cascaded errors.
In particular, when unresolved procedure call uses a direct name or an
extended name with an unknown prefix, e.g.:
Unknown (1, 2, 3);
Unknown.Call (1, 2, 3);
then the N_Procedure_Call statements are marked with Error_Posted. But
when a call uses an extended name with a known prefix we failed to flag
the N_Procedure_Call with Error_Posted.
Found while improving the robustness of a feature that detects
uninitialized scalar objects.
gcc/ada/
* sem_ch8.adb (Find_Expanded_Name): Emit a main error message
before adding a continuation with the call to
Error_Missing_With_Of_Known_Unit.
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The predicate is now a simple disjunction of two other predicates.
gcc/ada/
* sem_util.ads (Requires_Transient_Scope): Add pragma Inline.
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gcc/ada/
* sem_ch13.adb (Build_Predicate_Functions): If a semantic error
has been detected then ignore Predicate_Failure aspect
specifications in the same way as is done for CodePeer and
SPARK. This avoids an internal compiler error if
Ancestor_Predicate_Function_Called is True but Result_Expr is
not an N_And_Then node (and is therefore unsuitable as an
argument in a call to Left_Opnd).
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Now that finalization and return on the secondary stack are decoupled, the
transient scopes created because of the former need not necessarily manage
the secondary stack and trigger a violation of the associated restriction.
gcc/ada/
* exp_ch7.adb (Wrap_Transient_Declaration): Propagate Uses_Sec_Stack
to enclosing function if it does not return on the secondary stack.
* exp_ch6.adb (Expand_Call_Helper): Call Establish_Transient_Scope
with Manage_Sec_Stack set to True only when necessary.
* sem_res.adb (Resolve_Call): Likewise.
(Resolve_Entry_Call): Likewise.
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gcc/ada/
* sem_ch13.adb (Build_Predicate_Function): Ignore predicate
failure in CodePeer mode.
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This is needed in particular by GNAT LLVM builds.
gcc/ada/
* raise-gcc.c: Fix compilation with -DSTANDALONE under windows.
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Instead of using that of Original_Node (N) after rewriting, which does not
work if N had previously been rewritten.
gcc/ada/
* exp_ch4.adb (Narrow_Large_Operation): Preserve and reuse Etype.
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When the prefix of an Access attribute is an explicit dereference of an
access parameter (or a renaming of such a dereference, or a subcomponent
of such a dereference), the context is a general access type to a
class-wide interface type, and an accessibility check must be generated,
the frontend silently skips generating an implicit type conversion to
force the displacement of the pointer to reference the secondary
dispatch table.
gcc/ada/
* exp_attr.adb (Add_Implicit_Interface_Type_Conversion): New
subprogram which factorizes code.
(Expand_N_Attribute_Reference): Call the new subprogram to add
the missing implicit interface type conversion.
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In GNATprove mode we are don't want predicate failure to pollute the
predicate expression extracted from the predicate function.
gcc/ada/
* sem_ch13.adb (Build_Predicate_Function): Ignore predicate
failure in GNATprove mode.
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The run-time behavior of the Ada 2022 Predicate_Failure aspect was
incorrectly implemented. This could cause incorrect exception messages
at execution time in the case of a predicate check failure, as
demonstrated by ACATS test C324006. In addition, a new attribute
(Predicate_Expression) is defined in order to improve the FE/SPARK
interface.
gcc/ada/
* einfo-utils.ads, einfo-utils.adb: Delete Predicate_Function_M
function and Set_Predicate_Function_M procedure.
* einfo.ads: Delete comments for Is_Predicate_Function_M and
Predicate_Function_M functions. Add comment for new
Predicate_Expression function. Update comment describing
predicate functions.
* exp_util.ads, exp_util.adb (Make_Predicate_Call): Replace Mem
formal parameter with Static_Mem and Dynamic_Mem formals.
(Make_Predicate_Check): Delete Add_Failure_Expression and call
to it.
* exp_ch4.adb (Expand_N_In.Predicate_Check): Update
Make_Predicate_Call call to match profile change.
* gen_il-fields.ads: Delete Is_Predicate_Function_M field, add
Predicate_Expression field.
* gen_il-gen-gen_entities.adb: Delete Is_Predicate_Function_M
use, add Predicate_Expression use.
* sem_ch13.adb (Build_Predicate_Functions): Rename as singular,
not plural; we no longer build a Predicate_M function. Delete
Predicate_M references. Add new Boolean parameter for predicate
functions when needed. Restructure body of generated predicate
functions to implement required Predicate_Failure behavior and
to set new Predicate_Expression attribute. Remove special
treatment of raise expressions within predicate expressions.
* sem_util.ads (Predicate_Failure_Expression,
Predicate_Function_Needs_Membership_Parameter): New functions.
* sem_util.adb (Is_Current_Instance): Fix bugs which caused
wrong result.
(Is_Current_Instance_Reference_In_Type_Aspect): Delete
Is_Predicate_Function_M reference.
(Predicate_Failure_Expression): New function.
(Propagate_Predicate_Attributes): Delete Is_Predicate_Function_M
references.
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The underlying issue is that the front-end does not create transient scopes
for return statements, so objects copied for these statements can never be
finalized properly.
gcc/ada/
* exp_ch6.adb (Expand_Call_Helper): Adjust comment.
(Expand_Simple_Function_Return): For the case of a type which needs
finalization and is returned on the primary stack, do not create a
copy if the expression originates from a function call.
* exp_ch7.adb (Transient Scope Management): Adjust comment.
* exp_util.ads (Is_Related_To_Func_Return): Add WARNING line.
* fe.h (Is_Related_To_Func_Return): Declare.
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Expansion of entry families created a slightly illegal AST with
Elsif_Parts being an empty list. Cleanup uncovered by the work on
detection of uninitialized scalars.
gcc/ada/
* exp_ch9.adb (Build_Find_Body_Index): Remove empty Elsif_Parts
from the constructed IF statement.
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Expansion of entry families contained a condition that was always true.
Cleanup related to detection of uninitialized scalar objects (which
uncovered that expansion of entry families creates a slightly illegal
AST with Elsif_Parts being an empty list).
gcc/ada/
* exp_ch9.adb (Build_Find_Body_Index): Remove IF statement whose
condition was true-by-construction; remove excessive assertion
(since the call to Elsif_Parts will check that Nod is present
and it is an if-statement).
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gcc/ada/
* gnat1drv.adb, gnatcmd.adb: Remove references to gnatfind/xref.
* doc/gnat_ugn/building_executable_programs_with_gnat.rst,
doc/gnat_ugn/the_gnat_compilation_model.rst: Ditto.
* gnat_ugn.texi: Regenerate.
* gnatfind.adb, gnatxref.adb, xr_tabls.adb, xr_tabls.ads,
xref_lib.adb, xref_lib.ads: Removed, no longer used.
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Update to provers caused some proof regressions. Fix the proof by
adding an assertion.
gcc/ada/
* libgnat/a-strfix.adb: Add assertions.
* libgnat/a-strsup.adb: Idem.
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Add support for Ada 2022's "[]" null array aggregates (thanks to Ed
Schonberg for producing most of this patch).
gcc/ada/
* erroutc.ads: Fix a single-character typo in a comment.
* exp_aggr.adb: Fix a single-character typo in a comment.
Replace several pairs of calls to Low_Bound and
High_Bound (which do not handle an identifier that denotes a
scalar subtype) with corresponding calls to Get_Index_Bounds
(which does handle that case).
* par-ch4.adb (P_Aggregate_Or_Paren_Expr): Set the
Component_Associations attribute of a null array aggregate to
New_List.
* sem_aggr.ads: New visible function
Is_Null_Array_Aggregate_High_Bound.
* sem_aggr.adb (Is_Null_Array_Aggregate_High_Bound,
Is_Null_Aggregate, Resolve_Null_Array_Aggregate): New functions.
(Resolve_Aggregate): Recognize null array aggregates (using
Is_Null_Aggregate) and, when one is recognized, resolve
it (using Resolve_Null_Array_Aggregate). Avoid calling
Array_Aggr_Subtype for a null array aggregate; the needed
subtype is built in Resolve_Null_Array_Aggregate. Do not
incorrectly flag a null aggregate (after it is transformed by
expansion) as being both positional and named.
* sem_attr.adb (Eval_Attribute): Special treatment for null
array aggregate high bounds to avoid incorrectly flagging
something like Integer'Pred (Integer'First) as an illegal static
expression.
* sem_eval.adb (Out_Of_Range): Special treatment for null array
aggregate high bounds to avoid incorrectly flagging something
like Integer'Pred (Integer'First) as an illegal static
expression.
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After changes in Why3 and generation of VCs, ghost code needs to be
adapted for proofs to remain automatic.
gcc/ada/
* libgnat/s-aridou.adb (Lemma_Abs_Range,
Lemma_Double_Shift_Left, Lemma_Shift_Left): New lemmas.
(Double_Divide): Add ghost code.
(Lemma_Concat_Definition, Lemma_Double_Shift_Left,
Lemma_Shift_Left, Lemma_Shift_Right): Define or complete lemmas.
(Scaled_Divide): Add ghost code.
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This patch fixes a performance regression, introduced by a previous bug
fix. That fix had the unintended side effect of removing the
optimization in cases where the two operands are of two different
compiler-generated modular types.
gcc/ada/
* exp_pakd.adb (Expand_Packed_Eq): Replace the check for *same*
modular type, with a check for any modular type, and assert that
the two types have the same modulus and so on.
* exp_pakd.ads: Minor comment improvements.
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This patch fixes a bug where the -gnatyr switch fails to detect
incorrect casing of record components.
gcc/ada/
* style.adb (Check_Identifier): Deal with the case where a
record component definition has been transformed; we want to
warn if the original came from source.
* libgnat/s-objrea.ads, libgnat/s-objrea.adb: Fix casing of MF
to be consistent.
* uname.adb: Fix casing of Chars to be consistent.
* sem_util.ads: Minor comment fix.
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This eliminates the use of the secondary stack to return composite types
with controlled components from functions, by exposing the return slot of
these functions through the support interface of memory pools, much like
for the secondary stack itself. This is piggybacked on the support of a
specific intrinsic function by the code generator, and can be disabled if
this support is not available, as well with the -gnatd_r debug switch.
The change also streamlines a bit the implementation by consistently using
the Needs_Finalization predicate, or its derivatives, in various places.
gcc/ada/
* Makefile.rtl (GNATRTL_NONTASKING_OBJS): Add s-retsta.
* debug.adb (d_r): Document usage.
* exp_ch4.adb (Expand_N_Allocato): Deal with the return stack pool.
* exp_ch6.adb (Expand_Simple_Function_Return): Replace calls to
Requires_Transient_Scope with Returns_On_Secondary_Stack. Deal
with types that need finalization returned on the primary stack,
use CW_Or_Needs_Finalization for those returned on the secondary.
* exp_util.adb (Build_Allocate_Deallocate_Proc): Return early
for the return stack pool.
(Remove_Side_Effects): Call CW_Or_Needs_Finalization.
* fe.h (Requires_Transient_Scope): Delete.
(Returns_On_Secondary_Stack): Declare.
* gnat1drv.adb (Adjust_Global_Switches): Set Back_End_Return_Slot
to False when generating C code or if -gnatd_r is specified.
* opt.ads (Back_End_Return_Slot): New boolean variable.
* rtsfind.ads (RTU_Id): Add System_Return_Stack.
(RE_Id): Add RE_RS_Allocate and RE_RS_Pool.
(RE_Unit_Table): Add entries for RE_RS_Allocate and RE_RS_Pool.
* sem_util.ads (CW_Or_Has_Controlled_Part): Delete.
(CW_Or_Needs_Finalization): Declare.
(Requires_Transient_Scope): Adjust description.
(Returns_On_Secondary_Stack): Declare.
* sem_util.adb (Compute_Returns_By_Ref): Set Returns_By_Ref on types
which need finalization if they are returned on the secondary stack.
(CW_Or_Has_Controlled_Part): Rename to...
(CW_Or_Needs_Finalization): ...this.
(Requires_Transient_Scope): Move bulk of implementation to...
(Returns_On_Secondary_Stack): ...here. Return true for types which
need finalization only if the back-end return slot is not supported.
* libgnat/s-retsta.ads: New file.
* gcc-interface/ada-builtin-types.def (BT_FN_PTR_SSIZE): Define.
* gcc-interface/ada-builtins.def (return_slot): Likewise.
* gcc-interface/ada-tree.h (BUILT_IN_RETURN_SLOT): Likewise.
* gcc-interface/decl.cc (gnat_to_gnu_subprog_type): Replace call to
Requires_Transient_Scope with Returns_On_Secondary_Stack.
* gcc-interface/trans.cc (gnat_to_gnu) <N_Simple_Return_Statement>:
In the return by invisible reference, skip the copy if the source
is the same as the destination.
* gcc-interface/utils2.cc (build_call_alloc_dealloc_proc): Deal with
the return stack pool.
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No functional changes.
gcc/ada/
* gcc-interface/trans.cc: Fix formatting issues in comments.
(Subprogram_Body_to_gnu): Tidy up.
(Exception_Handler_to_gnu_gcc): Rename into...
(Exception_Handler_to_gnu): ...this.
(gnat_to_gnu) <N_Exception_Handler>: Adjust to above renaming.
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No functional changes.
gcc/ada/
* gcc-interface/trans.cc (Subprogram_Body_to_gnu): Rename a couple
of local variables and use Is_Generic_Subprogram predicate.
(process_decls): Likewise.
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gcc/ada/
* gcc-interface/trans.cc (Subprogram_Body_to_gnu): Do not deal with
inlining heuristics for expression functions here but...
* gcc-interface/decl.cc (inline_status_for_subprog): ...here instead
and do not override them at -Os.
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In GNAT AST the Scope field always points to the semantic scope (e.g.
subprogram) and never to syntactic scope (e.g. subprogram body).
Cleanup related to handling of circular access-to-record types.
gcc/ada/
* gcc-interface/decl.cc (gnat_to_gnu_entity): Remove dead code
which expected Scope to return E_Subprogram_Body entity.
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Update to provers caused some proof regressions. Fix the proof by
adding an assertion.
gcc/ada/
* libgnat/s-imageu.adb (Set_Image_Unsigned): Change assertion.
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Fix compilation warning. The code was using a cast to struct sigcontext
*, which doesn't exist. It worked by accident.
gcc/ada/
* sigtramp-qnx.c: Change struct sigcontext * to mcontext_t *.
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Rewrite and base on VxWorks RTP implementation.
gcc/ada/
* sigtramp-arm-qnx.c: Rewrite.
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After changes in Why3 and generation of VCs, ghost code needs to be
adapted for proofs to remain automatic.
gcc/ada/
* libgnat/s-aridou.adb (Big3): Change return type.
(Lemma_Mult_Non_Negative, Lemma_Mult_Non_Positive): Reorder
alphabetically.
(Lemma_Concat_Definition, Lemma_Double_Big_2xxsingle): New
lemmas.
(Double_Divide, Scaled_Divide): Add assertions.
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Update to provers caused some proof regressions. Fix the proof by
changing ghost code.
gcc/ada/
* libgnat/s-valueu.adb (Scan_Raw_Unsigned): Add assertions.
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gcc/ada/
* libgnat/s-dwalin.adb (Read_Aranges_Header): Initialize output
parameter in case we return early.
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Calls to various Vet functions are used throughout the containers
packages to check internal consistency. This patch improves efficiency
by disabling these calls when Container_Checks are suppressed.
gcc/ada/
* libgnat/a-crbtgo.ads, libgnat/a-rbtgbo.ads,
libgnat/a-cbdlli.adb, libgnat/a-cbhama.adb,
libgnat/a-cbhase.adb, libgnat/a-cdlili.adb,
libgnat/a-cfdlli.adb, libgnat/a-cfhama.adb,
libgnat/a-cfhase.adb, libgnat/a-cidlli.adb,
libgnat/a-cihama.adb, libgnat/a-cihase.adb,
libgnat/a-cohama.adb, libgnat/a-cohase.adb,
libgnat/a-crbtgo.adb, libgnat/a-crdlli.adb, libgnat/a-rbtgbo.adb
(Vet): Make the Vet functions do nothing when
Container_Checks'Enabled is False, and inline them, so the calls
disappear when optimizing.
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Configure the arm-qnx runtime packages to avoid generating these
symbols.
gcc/ada/
* Makefile.rtl (arm-qnx): Use default (non-fma) target pair.
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Currently, a 64-bit gnatsymbolize fails to output line numbers and
accurate symbol names when run on 32-bit executables (and vice-versa).
This is because a couple of spots in System.Dwarf_Lines expect the
Address_Size found in the DWARF data to match the host Address'Size.
This patch corrects that assumption.
gcc/ada/
* libgnat/s-dwalin.adb (Aranges_Lookup, Enable_Cache): Adapt to
changes in the signature of Read_Aranges_*.
(Debug_Info_Lookup): Do not control address size read from
DWARF.
(Read_Aranges_Header): Do not control address size read from
DWARF; return this size.
(Read_Aranges_Entry): Use the size returned by
Read_Aranges_Header.
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The error message issued for use of GNAT extension features without
specifying -gnatX (or pragma Extensions_Allowed) was confusing in the
presence of a pragma specifying a language version (such as "pragma
Ada_2022;"), because the pragma supersedes the switch. The message is
improved by testing for use of such a pragma, plus use of pragma
Extensions_Allowed is now suggested, and several cases are changed to
call the common error procedure for flagging uses of extension features.
gcc/ada/
* errout.ads (Error_Msg_GNAT_Extension): Add formal Loc and
revise comment.
* errout.adb (Error_Msg_GNAT_Extension): Condition message on
the flag Ada_Version_Pragma, and add suggestion to use of pragma
Extensions_Allowed in messages.
* par-ch3.adb, par-ch5.adb, par-ch6.adb, par-ch11.adb,
par-ch12.adb: Add actual Token_Ptr on calls to
Error_Msg_GNAT_Extension.
* par-ch4.adb: Change Error_Msg to Error_Msg_GNAT_Extension for
error calls related to use of extension features.
* sem_ch13.adb: Likewise.
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The conversion between OS and Ada priorties should be done in the wider
Interfaces.C.int type rather than Any_Priority otherwise
Constraint_Error will be raised when coverting Any_Priority'Last to int.
gcc/ada/
* libgnarl/s-osinte__qnx.adb (To_Target_Priority): Perform
arithmetic in int.
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For the sake of consistency with other similar manipulations.
gcc/ada/
* exp_ch7.adb (Build_BIP_Cleanup_Stmts): Use Needs_BIP_Alloc_Form.
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When a tagged type T has aspect String_Literal, a derived type defines a
null extension T2, and the context to resolve the use of an object of
type T2 where the string literal is applicable is a class-wide type the
frontend crashes trying to evaluate if the object is a null extension.
This problem does not reproduce when the compiler is built with
assertions disabled.
gcc/ada/
* sem_ch6.adb (Find_Corresponding_Spec): Avoid calling
Is_Null_Extension with a class-wide type entity.
(Overrides_Visible_Function): Handle alias entities.
* sem_res.adb (Has_Applicable_User_Defined_Literal): Conversion
not needed if the result type of the call is class-wide or if
the result type matches the context type.
* sem_util.ads (Is_Null_Extension): Adding documentation.
(Is_Null_Extension_Of): Adding documentation.
* sem_util.adb (Is_Null_Extension): Adding assertion.
(Is_Null_Extension_Of): Adding assertions.
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