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4 weeks agotailc: Handle musttail in case of non-cleaned-up cleanups, especially ASan related...
Jakub Jelinek [Tue, 1 Jul 2025 09:26:45 +0000 (11:26 +0200)] 
tailc: Handle musttail in case of non-cleaned-up cleanups, especially ASan related [PR120608]

The following testcases FAIL at -O0 -fsanitize=address.  The problem is
we end up with something like
  _26 = foo (x_24(D)); [must tail call]
  // predicted unlikely by early return (on trees) predictor.
  finally_tmp.3_27 = 0;
  goto <bb 5>; [INV]
...
  <bb 5> :
  # _6 = PHI <_26(3), _23(D)(4)>
  # finally_tmp.3_8 = PHI <finally_tmp.3_27(3), finally_tmp.3_22(4)>
  .ASAN_MARK (POISON, &c, 4);
  if (finally_tmp.3_8 == 1)
    goto <bb 7>; [INV]
  else
    goto <bb 6>; [INV]

  <bb 6> :
<L4>:
  finally_tmp.4_31 = 0;
  goto <bb 8>; [INV]
...
  <bb 8> :
  # finally_tmp.4_9 = PHI <finally_tmp.4_31(6), finally_tmp.4_30(7)>
  .ASAN_MARK (POISON, &b, 4);
  if (finally_tmp.4_9 == 1)
    goto <bb 9>; [INV]
  else
    goto <bb 10>; [INV]
...
  <bb 10> :
  # _7 = PHI <_6(8), _34(9)>
  .ASAN_MARK (POISON, &a, 4);

  <bb 11> :
<L11>:
  return _7;
before the sanopt pass.  This is -O0, we don't try to do forward
propagation, jump threading etc.  And what is worse, the sanopt
pass lowers the .ASAN_MARK calls that the tailc/musttail passes
already handle into somewthing that they can't easily pattern match.

The following patch fixes that by
1) moving the musttail pass 2 passes earlier (this is mostly just
   for -O0/-Og, for normal optimization levels musttail calls are
   handled in the tailc pass), i.e. across the sanopt and cleanup_eh
   passes
2) recognizes these finally_tmp SSA_NAME assignments, PHIs using those
   and GIMPLE_CONDs deciding based on those both on the backwards
   walk (when we start from the edges to EXIT) and forwards walk
   (when we find a candidate tail call and process assignments
   after those up to the return statement).  For backwards walk,
   ESUCC argument has been added which is either NULL for the
   noreturn musttail case, or the succ edge through which we've
   reached bb and if it sees GIMPLE_COND with such comparison,
   based on the ESUCC and comparison it will remember which later
   edges to ignore later on and which bb must be walked up to the
   start during tail call discovery (the one with the PHI).
3) the move of musttail pass across cleanup_eh pass resulted in
   g++.dg/opt/pr119613.C regressions but moving cleanup_eh before
   sanopt doesn't work too well, so I've extended
   empty_eh_cleanup to also handle resx which doesn't throw
   externally

I know moving a pass on release branches feels risky, though the
musttail pass is only relevant to functions with musttail calls,
so something quite rare and only at -O0/-Og (unless one e.g.
disables the tailc pass).

2025-07-01  Jakub Jelinek  <jakub@redhat.com>

PR middle-end/120608
* passes.def (pass_musttail): Move before pass_sanopt.
* tree-tailcall.cc (empty_eh_cleanup): Handle GIMPLE_RESX
which doesn't throw externally through recursion on single
eh edge (if any and cnt still allows that).
(find_tail_calls): Add ESUCC, IGNORED_EDGES and MUST_SEE_BBS
arguments.  Handle GIMPLE_CONDs for non-simplified cleanups with
finally_tmp temporaries both on backward and forward walks, adjust
recursive call.
(tree_optimize_tail_calls_1): Adjust find_tail_calls callers.

* c-c++-common/asan/pr120608-3.c: New test.
* c-c++-common/asan/pr120608-4.c: New test.
* g++.dg/asan/pr120608-3.C: New test.
* g++.dg/asan/pr120608-4.C: New test.

4 weeks agoFortran: Fix non-conformable corank on this_image ref [PR120843]
Andre Vehreschild [Fri, 27 Jun 2025 12:39:13 +0000 (14:39 +0200)] 
Fortran: Fix non-conformable corank on this_image ref [PR120843]

PR fortran/120843

gcc/fortran/ChangeLog:

* resolve.cc (resolve_operator): Report inconsistent coranks
only when not referencing this_image.
(gfc_op_rank_conformable): Treat coranks as inconformable only
when a coindex other then implicit this_image is used.

gcc/testsuite/ChangeLog:

* gfortran.dg/coarray/coindexed_6.f90: New test.

4 weeks agoaarch64: Sync `aarch64-sys-regs.def' with Binutils.
Ezra Sitorus [Tue, 1 Jul 2025 08:22:05 +0000 (10:22 +0200)] 
aarch64: Sync `aarch64-sys-regs.def' with Binutils.

This patch updates `aarch64-sys-regs.def', bringing it into sync with
the Binutils source after this change:
https://sourceware.org/pipermail/binutils/2025-March/139894.html

gcc/ChangeLog:

* config/aarch64/aarch64-sys-regs.def: Copy from Binutils.

4 weeks agoada: Restore consistent rounding of 'Value for ordinary fixed-point types
Eric Botcazou [Mon, 26 May 2025 10:21:02 +0000 (12:21 +0200)] 
ada: Restore consistent rounding of 'Value for ordinary fixed-point types

This restores the rounding of the first scaled divide operation applied to
the extra digits, which yields more consistent results for smalls that are
reciprocal of integers.

gcc/ada/ChangeLog:

* libgnat/s-valuef.adb (Integer_to_Fixed): Restore rounding of the
first scaled divide operation.

4 weeks agoada: Fix ALI elaboration flags for ghost compilation units
Piotr Trojanek [Thu, 22 May 2025 14:46:17 +0000 (16:46 +0200)] 
ada: Fix ALI elaboration flags for ghost compilation units

When GNAT was compiling a ghost unit, the ALI file wrongly suggested that this
unit includes elaboration code, which caused linking errors to non-existing
elaboration counters. This was because elaboration code is only detected in
Gigi, which is skipped for ignored ghost units, because we don't generate
object code for them

gcc/ada/ChangeLog:

* gnat1drv.adb (Gnat1drv): Do minimal decoration of the spec and body
of an ignored ghost compilation unit.

4 weeks agoada: Remove unused variables from the binder generation routine
Piotr Trojanek [Thu, 22 May 2025 10:16:18 +0000 (12:16 +0200)] 
ada: Remove unused variables from the binder generation routine

Remove leftovers from zero cost exception handling; semantics is unaffected.

gcc/ada/ChangeLog:

* ali.ads (Unit_Record): Fix grammar in comment.
* bindgen.adb (Num_Elab_Calls, Num_Primary_Stacks): Remove counters
that were only incremented and never actually used.

4 weeks agoada: Disallow underscore before exponent
Tonu Naks [Thu, 22 May 2025 13:07:08 +0000 (13:07 +0000)] 
ada: Disallow underscore before exponent

Underscore is allowed only between digits. The current implementattion
was considering 'E' as a digit even if it was not in the range of
Base and could denote exponent only.

gcc/ada/ChangeLog:

* libgnat/s-valuer.adb (Scan_Decimal_Digits,
Scan_Integral_Digits): fix condition for rejecting
underscore.

4 weeks agoada: Fix couple of issues in System.Value_D.Integer_To_Decimal function
Eric Botcazou [Wed, 21 May 2025 13:15:48 +0000 (15:15 +0200)] 
ada: Fix couple of issues in System.Value_D.Integer_To_Decimal function

The first issue is that the function would wrongly raise Constraint_Error
on the edge case where Val = 2**(Int'Size - 1) and Minus is not set.

The second issue is that the function takes a long time to deal with huge
negative exponents.

The change also contains minor consistency fixes for its counterpart that
is present in System.Value_F, namely Integer_To_Fixed.

gcc/ada/ChangeLog:

* libgnat/s-valued.adb (Integer_To_Decimal): Deal specifically with
Val = 2**(Int'Size - 1) if Minus is not set.  Exit the loops when V
saturates to 0 in the case of (huge) negative exponents.  Use Base
instead of B consistently in unsigned computations.
* libgnat/s-valuef.adb (Integer_To_Fixed): Use Base instead of B
consistently in unsigned computations.

4 weeks agoada: Do minimal expansion of fixedpoint operations for GNATprove
Piotr Trojanek [Wed, 21 May 2025 14:17:12 +0000 (16:17 +0200)] 
ada: Do minimal expansion of fixedpoint operations for GNATprove

A minimal expansion of fixedpoint operations is needed for GNATprove, because
the subsequent resolution of type conversion relies on this expansion being
done.

gcc/ada/ChangeLog:

* exp_ch4.adb (Fixup_Universal_Fixed_Operation): Move to spec.
* exp_ch4.ads (Fixup_Universal_Fixed_Operation): Move from body.
* exp_spark.adb (Expand_SPARK): Call a fixup expansion routine.

4 weeks agoada: Fix for compiler crash on function return with Relaxed_Finalization parts
Gary Dismukes [Tue, 20 May 2025 00:16:25 +0000 (00:16 +0000)] 
ada: Fix for compiler crash on function return with Relaxed_Finalization parts

The compiler crashes on compiling a return statement of a function whose result
type has a component whose type is specified with Relaxed_Finalization. The
compiler was attempting to retrieve a nonexistent BIP_Collection extra formal
from the enclosing function, which may not exist in the case of result types
with Relaxed_Finalization.

gcc/ada/ChangeLog:

* exp_ch3.adb (Build_Heap_Or_Pool_Allocator): Test not Has_Relaxed_Finalization
as a guard against retrieving BIP_Collection formal (and related code).

4 weeks agoada: Warn on untagged record type equality
Javier Miranda [Fri, 16 May 2025 17:59:43 +0000 (17:59 +0000)] 
ada: Warn on untagged record type equality

The frontend reports a warning when no component of an untagged
record type U is a record type, and the type C of some of its
components has defined its user-defined equality operator "=".

The warning is reported because it may be surprising that, following
RM 4.5.2 (24/3), the predefined "=" of the component type C takes
precedence over its user-defined "=" when objects of the record
type R are compared.

gcc/ada/ChangeLog:

* exp_ch3.adb (Build_Untagged_Record_Equality): Report the
warning when no component of an untagged record type U is a
record type, and the type C of some of its components has
defined its user-defined equality operator "=".
* exp_ch4.adb (Expand_Composite_Equality): Report the warning
calling Warn_On_Ignored_Equality_Operator.
* sem_warn.ads (Warn_On_Ignored_Equality_Operator): New subprogram.
* sem_warn.adb (Warn_On_Ignored_Equality_Operator): Factorize code
reporting the warning.

4 weeks agoada: Reduce the likelihood of overflow in Tanh
Tonu Naks [Mon, 19 May 2025 17:20:41 +0000 (17:20 +0000)] 
ada: Reduce the likelihood of overflow in Tanh

gcc/ada/ChangeLog:

* libgnat/a-ngelfu.adb: conditional computation of X^2

4 weeks agoada: Split the unit System.Case_Utilities into two parts.
Steve Baird [Mon, 21 Apr 2025 22:28:39 +0000 (15:28 -0700)] 
ada: Split the unit System.Case_Utilities into two parts.

The package System.Case_Utilities provides some subprograms that do not make
use of the secondary stack and some that do. When compiling in a context
where no secondary stack support is provided, this makes the entire package
unusable (and similarly for any other package that withs this package).
Split the package into two packages named Case_Utilities_NSS and Case_Utilities
(NSS is for "no secondary stack"). The first package declares the
subprograms that do not need secondary stack support. The second package
declares the remaining subprograms, as well as renamings of everything declared
in the first part. A client that continues to reference Case_Utilities is
largely unaffected by this change. But if we change a client to reference
Case_Utilities_NSS instead, that removes an obstacle that would otherwise
prevent using that client unit in a no-secondary-stack-support environment.
We then make that change to the body of package System.Val_Util.

gcc/ada/ChangeLog:

* Makefile.rtl: Add entry for new unit's object file.
* libgnat/s-casuti.adb: Remove bodies of subprograms that were moved
to the new unit.
* libgnat/s-casuti.ads: Replace (with renamings) declarations for
subprograms that moved to the new unit.
* libgnat/s-cautns.adb: Body for new unit (a new source file).
* libgnat/s-cautns.ads: Spec for new unit (a new source file).
* libgnat/s-valuti.adb: Use the new unit instead of the old one.
* gcc-interface/Make-lang.in: Add entries for new unit's object file.
* gcc-interface/Makefile.in: Likewise.

4 weeks agoada: Compiler fails on unchecked deallocation for constrained protected subtype
Gary Dismukes [Fri, 16 May 2025 23:11:26 +0000 (23:11 +0000)] 
ada: Compiler fails on unchecked deallocation for constrained protected subtype

The compiler fails with an error or Assert_Failure when calling
an instantiation of Unchecked_Deallocation that has been instantiated
with a constrained subtype of a discriminated protected type.

gcc/ada/ChangeLog:

* sem_ch3.adb (Constrain_Corresponding_Record): Inherit Class_Wide_Type on the
created constrained subtype.

4 weeks agoada: Add GNAT LLVM selection in GPR project file.
Artur Pietrek [Mon, 19 May 2025 12:33:28 +0000 (14:33 +0200)] 
ada: Add GNAT LLVM selection in GPR project file.

gcc/ada/ChangeLog:

* doc/gnat_ugn/building_executable_programs_with_gnat.rst: add
GNAT LLVM explicit selection in GPR file
* gnat_ugn.texi: Regenerate.

4 weeks agoada: Small tweak to latest change
Eric Botcazou [Fri, 16 May 2025 23:20:19 +0000 (01:20 +0200)] 
ada: Small tweak to latest change

Unlike RTE, RTU_Entity alone does not cause the unit to be loaded.

gcc/ada/ChangeLog:

* exp_ch7.adb (Shift_Address_For_Descriptor): Add dummy variable
to make sure that System_Storage_Elements is loaded.

4 weeks agoada: Add "continue" GNAT extension
Ronan Desplanques [Fri, 16 May 2025 08:47:06 +0000 (10:47 +0200)] 
ada: Add "continue" GNAT extension

This extension adds "continue" as a nonreserved keyword, and this is the
first occurrence of a nonreserved keyword in GNAT, which causes this
patch to add unusual overload resolution code.

New node kinds are introduced, but since they are entirely transformed
into existing constructs during expansion, back ends that don't turn off
expansion do not need to be updated.

gcc/ada/ChangeLog:

* doc/gnat_rm/gnat_language_extensions.rst: Document new extension.
* gen_il-fields.ads (Opt_Field_Enum): Add new fields.
* gen_il-types.ads (N_Loop_Flow_Statement, N_Continue_Statement): New
node kinds.
* gen_il-gen-gen_nodes.adb (N_Loop_Flow_Statement): New abstract node
kind.
(N_Continue_Statement): New node kind.
(N_Exit_Statement): Reparent below N_Loop_Flow_Statement.
* sinfo.ads (N_Continue_Statement): Add description.
* sinfo-utils.ads (Loop_Flow_Keyword): New function.
* sinfo-utils.adb (Loop_Flow_Keyword): New function.
* gen_il-gen-gen_entities.adb (E_Loop): Add new field.
* einfo.ads (Continue_Mark): Document new field.
* sprint.adb (Sprint_Node_Actual): Update for new node kind.
* snames.ads-tmpl: Add new keyword.
* par-ch5.adb (P_Continue_Statement, Parse_Loop_Flow_Statement): New
functions.
(P_Sequence_Of_Statements): Handle continue statements.
(P_Exit_Statement): Use Parse_Loop_Flow_Statement.
* sem.adb (Analyze): Handle new node kind.
* sem_ch5.adb (Analyze_Loop_Flow_Statement): New function.
(Analyze_Continue_Statement): New procedure.
(Analyze_Exit_Statement): Use new Analyze_Loop_Flow_Statement function.
* sem_ch5.ads (Analyze_Continue_Statement): New procedure.
* expander.adb (Expand): Handle new node kind.
* exp_ch5.ads (Expand_N_Continue_Statement): New procedure.
* exp_ch5.adb (Expand_Loop_Flow_Statement): New procedure.
(Expand_N_Continue_Statement): New procedure.
(Expand_N_Exit_Statement): Use new Expand_Loop_Flow_Statement
procedure.
(Build_Formal_Container_Iteration): Always reuse original loop entity.
* gnat_rm.texi: Regenerate.

4 weeks agoada: Disable -gnatR2 output in case of object renamings
Bob Duff [Fri, 16 May 2025 13:04:48 +0000 (09:04 -0400)] 
ada: Disable -gnatR2 output in case of object renamings

Such output was unnecessary, and in some cases harmful.
In particular, we generate renamings in the expanded
code for protected types, with internally-generated names,
which could be confusing to the user. In addition, in the
JSON output (-gnatR2j), these generated renamings could have
duplicate source locatations, which confused SPARK.

gcc/ada/ChangeLog:

* repinfo.adb (List_Entities):
Disable output in case of object renamings.

4 weeks agoada: Correct comment in s-valuen.ads
Aleksandra Pasek [Thu, 15 May 2025 21:40:55 +0000 (21:40 +0000)] 
ada: Correct comment in s-valuen.ads

gcc/ada/ChangeLog:

* libgnat/s-valuen.ads: Correct comment.

4 weeks agoada: include string.h
Alexandre Oliva [Thu, 15 May 2025 03:07:03 +0000 (00:07 -0300)] 
ada: include string.h

__gnat_install_handler calls strncmp when __HANDLE_VXSIM_SC is
defined, so string.h needs to be included, and gcc-14 enforces this
requirement.

gcc/ada/ChangeLog:

* init.c: Include string.h.

4 weeks agoada: Drop the chapter listing implemented Ada 2012 AI's
Tonu Naks [Wed, 14 May 2025 13:51:25 +0000 (13:51 +0000)] 
ada: Drop the chapter listing implemented Ada 2012 AI's

We support Ada 2012 fully. The chapter is out of date
and would serve no purpose if it was up to date.

gcc/ada/ChangeLog:

* doc/gnat_rm.rst: remove ref to 2012 chapter
* doc/gnat_rm/about_this_guide.rst: remove ref to 2012 chapter
* doc/gnat_rm/compatibility_and_porting_guide.rst: update list of
supported versions
* doc/gnat_rm/implementation_of_ada_2012_features.rst: delete
* doc/gnat_rm/specialized_needs_annexes.rst: update list of
supported versions
* gnat_rm.texi: Regenerate.

4 weeks agoada: Replace references for GLADE with PolyORB
Tonu Naks [Wed, 14 May 2025 14:16:19 +0000 (14:16 +0000)] 
ada: Replace references for GLADE with PolyORB

gcc/ada/ChangeLog:

* doc/gnat_rm/implementation_advice.rst: remove GLADE
* doc/gnat_rm/implementation_defined_characteristics.rst: remove GLADE
* doc/gnat_rm/specialized_needs_annexes.rst: remove GLADE
* doc/gnat_rm/the_gnat_library.rst: remove GLADE
* gnat_rm.texi: Regenerate.

4 weeks agoada: use __builtin_alloca for alloca on vxworks
Alexandre Oliva [Tue, 13 May 2025 02:23:14 +0000 (23:23 -0300)] 
ada: use __builtin_alloca for alloca on vxworks

Several adaint.c functions call alloca, but vxworks doesn't declare
it.  Use the GCC builtin.

gcc/ada/ChangeLog:

* adaint.c [__vxworks] (alloca): Redirect to builtin.

4 weeks agoada: freeze.adb: do not emit error on non-aligned component in CodePeer_Mode
Ghjuvan Lacambre [Fri, 9 May 2025 09:20:18 +0000 (11:20 +0200)] 
ada: freeze.adb: do not emit error on non-aligned component in CodePeer_Mode

These errors hinder analysis of non-GNAT code and are not useful to the
user as CodePeer does not care about alignment.

gcc/ada/ChangeLog:

* freeze.adb (Freeze_Record_Type): Check for CodePeer_Mode.

4 weeks agoada: Move aspects when instantiating subprograms as compilation units
Piotr Trojanek [Fri, 9 May 2025 15:31:39 +0000 (17:31 +0200)] 
ada: Move aspects when instantiating subprograms as compilation units

When rewriting N_Subprogram_Instantiation into wrapper packages we must move
the original aspect specifications to the wrapper packages, as otherwise they
will be only accessible via Original_Node. This is similar to how we move
aspect specifications for expression functions and many other constructs.

gcc/ada/ChangeLog:

* sem_ch12.adb (Analyze_Subprogram_Instantiation): Move aspects when
instantiating subprogram as a library unit.

4 weeks agoada: Remove useless subexpressions
Ronan Desplanques [Fri, 9 May 2025 08:15:09 +0000 (10:15 +0200)] 
ada: Remove useless subexpressions

The subexpressions this patch removes were clearly useless given the
test for "No (Scheme)" in a preceding condition.

gcc/ada/ChangeLog:

* exp_ch5.adb (Expand_N_Loop_Statement): Remove useless subexpressions.

4 weeks agoada: Document sanitizers in mixed-language applications
Jose Ruiz [Fri, 9 May 2025 15:24:33 +0000 (17:24 +0200)] 
ada: Document sanitizers in mixed-language applications

gcc/ada/ChangeLog:

* doc/gnat_ugn/gnat_and_program_execution.rst: Add the
documentation about benefits of using sanitizers in
mixed-language applications.
* gnat_ugn.texi: Regenerate.

4 weeks agoada: Handle Warnings_As_Errors the same way.
Viljar Indus [Fri, 2 May 2025 10:04:55 +0000 (13:04 +0300)] 
ada: Handle Warnings_As_Errors the same way.

There are multiple scenarios where warnings can be turned into
errors. However internally they should always be handled the
same way and we should not rely on additional counters and variables
to handle the different behaviours.

These different types of converted warnings have however been
emitted differently historically. This information is stored in
the Warn_Err attribute which now stores the reason for the conversion
so that the printers know how to handle those scenarios.

Based on the reason these warnings are printed in different ways:
* If converted by pragma Warning_As_Error then it should print the
message with an error prefix and a [warning-as-error] tag.
* If it is a run time warning converted by -gnatwE then the message
should be printed with just an error prefix.
* if the warning was converted by -gnatwe then the message should be
printed with a warning prefix.

gcc/ada/ChangeLog:

* atree.ads (Compile_Time_Pragma_Warnings): Removed.
* errout.adb (Initialize): Remove initialization for
Compile_Time_Pragma_Warnings.
(Error_Msg_Internal): Use Warning_As_Error_Kind in the
Error_Msg_Object. Set its value based on the reason the
warning was changed to an error.
(Write_JSON_Span): Adjust the code for Warn_Err.
(Output_Messages): Update the calculation for actual warnings
and errors by just using Warnings_Treated_As_Errors.
(Set_Msg_Text): Simply mark that we are dealing with a
run time message here. Move the code for the Warning_Mode to
Error_Msg_Internal.
* erroutc-pretty_emitter.adb (Write_Error_Msg_Line): Adjust the code
for Warn_Err. Use the Warn_As_Err_Tag token.
* erroutc.adb (Compilation_Errors): Simplify the implementation so
that it only checks for errors and warnings treated as errors.
(Decrease_Error_Msg_Count): Remove the count for
Compile_Time_Pragma_Warnings.
(dmsg): Adjust the code for changes to Warn_Err.
(Increase_Error_Msg_Count): Likewise and remove the count for
Compile_Time_Pragma_Warnings.
(Output_Msg_Text): Warnings converted to error by the
Warning_As_Error pragma and -gnatwE now use the error prefix
in their messages but only warnings changed by the pragma get
the [warning-as-error] tag.
(Output_Text_Within): Adjust the variable name for
Is_Runtime_Raise_Msg.
(Write_Error_Summary): Adjust printing of warnings so that it
just uses the counts for Warnings_Detected and
Warnings_Treated_As_Errors.
* erroutc.ads (Is_Runtime_Raise): renamed to Is_Runtime_Raise_Msg.
(Warning_As_Error_Kind): New type for marking the warning message
is treated as an error which also captures the reason for the
change. Historically each of the reasons will have a different way
of displaying the warning message.
(Error_Msg_Object.Warn_Err): Change type to Warning_As_Error_Kind.
(Kind_To_String): Warnings treated as errors originating from
the pragma or -gnatwE will return error where as warnings
originating from -gnatwe will return warning.
(Compilation_Errors): Update the documentation.
(Warn_As_Err_Tag): Constant string to be used when printing warnings
as errors.
* errutil.adb (Error_Msg): Adjust the code for Warn_Err.

4 weeks agoada: Fix wrong finalization of constrained subtype of unconstrained array type
Eric Botcazou [Tue, 6 May 2025 17:03:19 +0000 (19:03 +0200)] 
ada: Fix wrong finalization of constrained subtype of unconstrained array type

Dynamically allocated objects of a constrained subtype of an unconstrained
array type with a controlled component type have not been properly finalized
since the first rewrite of the finalization machinery more than a decade
ago.  The reason is that the Finalize_Address routine is that of the base
type, which is unconstrained, and thus requires the bounds, which are not
present for the subtype in the allocation.

This is fixed by setting Is_Constr_Array_Subt_With_Bounds for allocators the
same way it is set for object declarations.  The rest is just refactoring.

gcc/ada/ChangeLog:

* exp_ch7.adb (Shift_Address_For_Descriptor): New function.
(Make_Address_For_Finalize): Call above function.
(Make_Finalize_Address_Stmts): Likewise.
* exp_util.ads (Is_Constr_Array_Subt_Of_Unc_With_Controlled): New
predicate.
* exp_util.adb (Is_Constr_Array_Subt_Of_Unc_With_Controlled): Ditto.
(Remove_Side_Effects): Call above predicate.
* sem_ch3.adb (Analyze_Object_Declaration): Likewise.
* sem_ch4.adb (Analyze_Allocator): Allocate the bounds by setting
Is_Constr_Array_Subt_With_Bounds when appropriate.

4 weeks agoada: Dispatching call with mutably tagged objects
Javier Miranda [Tue, 6 May 2025 17:41:51 +0000 (17:41 +0000)] 
ada: Dispatching call with mutably tagged objects

The compiler rejects performing a dispatching call using the
prefix notation when the prefix of the call is a mutably
tagged class-wide type object.

gcc/ada/ChangeLog:

* sem_ch4.adb (Try_Object_Operation): Handle mutably tagged
class-wide type prefix.

4 weeks agoada: Improve Warning_Treated_As_Error
Viljar Indus [Mon, 5 May 2025 07:06:56 +0000 (10:06 +0300)] 
ada: Improve Warning_Treated_As_Error

gcc/ada/ChangeLog:

* errout.adb (Error_Msg_Internal): Use the new
Warning_Treated_As_Error function.
* erroutc.adb (Get_Warning_Option): Add new version of this
function that operates on the Error_Msg_Object directly instead
of the Error_Id. Update the existing function to call the new
version interanlly.
(Get_Warning_Tag): Likewise.
(Warning_Treated_As_Error): Add a new method that combines the
checks for the error message itself and its tag.
* erroutc.ads (Get_Warning_Option): Add new spec.
(Get_Warning_Option): Likewise.
(Get_Warning_Option): Likewise.

4 weeks agoada: Remove Count_Compile_Time_Pragma_Warnings
Viljar Indus [Wed, 30 Apr 2025 11:00:49 +0000 (14:00 +0300)] 
ada: Remove Count_Compile_Time_Pragma_Warnings

Use a live counter Compile_Time_Pragma_Warnings to keep track of
those messages instead of using a method to count them in the end.

gcc/ada/ChangeLog:

* atree.ads: Add Compile_Time_Pragma_Warnings for counting
compile time warnings.
* errout.adb (Initialize): Initialize Compile_Time_Pragma_Warnings.
(Output_Messages): Use Compile_Time_Pragma_Warnings instead of
Count_Compile_Time_Pragma_Warnings.
* erroutc.adb (Compilation_Errors): Likewise.
(Count_Compile_Time_Pragma_Warnings): Removed.
(Decrease_Error_Msg_Count): Update Compile_Time_Pragma_Warnings.
(Increase_Error_Msg_Count): Likewise.
(Write_Error_Summary): Use Compile_Time_Pragma_Warnings instead of
Count_Compile_Time_Pragma_Warnings.
* erroutc.ads (Count_Compile_Time_Pragma_Warnings): Removed.

4 weeks agoada: Use common routine to handle warning counting
Viljar Indus [Wed, 30 Apr 2025 10:53:03 +0000 (13:53 +0300)] 
ada: Use common routine to handle warning counting

gcc/ada/ChangeLog:

* errout.adb (Delete_Warning_And_Continuations): Use
Decrease_Error_Msg_Count to update the message counts.
(Delete_Warning): Likewise.
(To_Be_Removed): Likewise.

4 weeks agoada: Mark errors that are removed as deleted
Viljar Indus [Wed, 30 Apr 2025 10:50:27 +0000 (13:50 +0300)] 
ada: Mark errors that are removed as deleted

gcc/ada/ChangeLog:

* errout.adb (Remove_Warning_Messages): Mark removed messages as
deleted.
* erroutc.adb (Purge_Messages): Likewise.

4 weeks agoada: Remove spurious warnings about No_Exception_Propagation in GNATprove mode
Martin Clochard [Tue, 6 May 2025 13:59:16 +0000 (15:59 +0200)] 
ada: Remove spurious warnings about No_Exception_Propagation in GNATprove mode

gcc/ada/ChangeLog:

* frontend.adb (Frontend): do not override GNATprove's setting for
Warn_On_Non_Local_Exception

4 weeks agoada: Remove dead assignment
Eric Botcazou [Tue, 6 May 2025 07:03:44 +0000 (09:03 +0200)] 
ada: Remove dead assignment

The assignment sets the Etype of a node to itsef.

gcc/ada/ChangeLog:

* sem_ch4.adb (Analyze_Allocator): Do not set Etype to itself.

4 weeks agoada: Fix wrong finalization of constrained array derived from unconstrained
Eric Botcazou [Mon, 5 May 2025 14:59:13 +0000 (16:59 +0200)] 
ada: Fix wrong finalization of constrained array derived from unconstrained

The bug had been present for dynamically allocated objects since the first
rewrite of the finalization machinery more than a decade ago, and was then
propagated to statically declared objects by the recent rewrite.

gcc/ada/ChangeLog:

* exp_util.adb (Finalize_Address): Do not go to the root type for
array types.

4 weeks agoada: Get rid of multiple roundings for 'Value of ordinary fixed-point types
Eric Botcazou [Wed, 30 Apr 2025 07:56:42 +0000 (09:56 +0200)] 
ada: Get rid of multiple roundings for 'Value of ordinary fixed-point types

They are used to minimize the error after every operation, but they can be
eliminated by increasing the precision of the input value, which avoids the
unwanted effects of multiple roundings.

gcc/ada/ChangeLog:

* libgnat/s-valuer.ads (System.Value_R): Remove Round parameter.
(Scan_Raw_Real): Replace Extra with Extra2 and adjust the comment.
(Value_Raw_Real): Likewise.
* libgnat/s-valuer.adb (Round_Extra): Delete.
(Scan_Decimal_Digits): Replace Extra with Extra2 and adjust the
implementation.
(Scan_Integral_Digits): Replace Extra with Extra2 and Extra_Rounded
with Extra2_Filled and adjust the implementation.
(Scan_Raw_Real): Replace Extra with Extra2 and adjust the
implementation.
(Value_Raw_Real): Likewise.
* libgnat/s-valrea.adb (Impl): Remove actual for Round formal.
* libgnat/s-valued.adb (Impl): Likewise.
(Integer_to_Decimal): Replace Extra with Extra2 and adjust the
implementation.  Rename Unsigned_To_Signed to To_Signed.
(Scan_Decimal): Replace Extra with Extra2 and adjust the
implementation.
(Value_Decimal): Likewise.
* libgnat/s-valuef.adb (Impl): Remove actual for Round formal.
(Integer_to_Fixed): Replace Extra with Extra2 and adjust the
implementation.  Rename Unsigned_To_Signed to To_Signed.  Only
round the last scaled divide operation.
(Scan_Fixed): Replace Extra with Extra2 and adjust the
implementation.
(Value_Fixed): Likewise.

4 weeks agoada: Clarify numeric parsing code
Ronan Desplanques [Mon, 5 May 2025 09:37:00 +0000 (11:37 +0200)] 
ada: Clarify numeric parsing code

This patch rephrases some code in System.Value_R to make it easier to
read.

gcc/ada/ChangeLog:

* libgnat/s-valuer.adb (Scan_Decimal_Digits, Scan_Integral_Digits):
Minor rephrasing.

4 weeks agoada: Set ekind of loop parameters earlier
Ronan Desplanques [Wed, 16 Apr 2025 10:33:11 +0000 (12:33 +0200)] 
ada: Set ekind of loop parameters earlier

gcc/ada/ChangeLog:

* sem_ch5.adb (Analyze_Loop_Parameter_Specification): Set ekind
earlier.

4 weeks agoada: Small cleanup in the finalization machinery
Eric Botcazou [Thu, 1 May 2025 23:10:36 +0000 (01:10 +0200)] 
ada: Small cleanup in the finalization machinery

The generic finalization machinery and the finalization machinery for
transient objects disagree on which controlled objects should be finalized
indirectly, i.e. through an access value: the former only considers return
objects of (selected) function calls, whereas the latter considers all
objects designated by a reference, which means that it must be careful
about not finalizing them twice.

The discrepancy does not seem to cause problems in practice, but is awkward
and creates additional work for the finalization machinery for transient
objects, as well as code duplication.

gcc/ada/ChangeLog:

* exp_util.ads (Is_Finalizable_Access): New predicate.
(Is_Non_BIP_Func_Call): Delete.
(Is_Secondary_Stack_BIP_Func_Call): Likewise.
* exp_util.adb (Is_Finalizable_Access): New predicate.
(Initialized_By_Aliased_BIP_Func_Call): Delete.
(Initialized_By_Reference): Likewise.
(Is_Aliased): Only consider the nontransient object serviced by
the transient scope.
(Is_Part_Of_BIP_Return_Statement): Minor tweak.
(Is_Finalizable_Transient): Remove calls to Initialized_By_Reference
and Initialized_By_Aliased_BIP_Func_Call.
Call Is_Finalizable_Access for access objects.
(Is_Non_BIP_Func_Call): Delete.
(Is_Secondary_Stack_BIP_Func_Call): Likewise.
(Requires_Cleanup_Actions): Call Is_Finalizable_Access for access
objects.
(Side_Effect_Free): Return True for N_Reference.
* exp_ch7.adb (Build_Finalizer.Process_Declarations): Call
Is_Finalizable_Access for access objects.

4 weeks agoada: Fix wrong finalization of temporary constrained array of controlled type
Eric Botcazou [Fri, 2 May 2025 13:32:54 +0000 (15:32 +0200)] 
ada: Fix wrong finalization of temporary constrained array of controlled type

This regression has been introduced by the rewrite of the finalization
machinery, which now requires a specific handling of constrained array
types with controlled component and an unconstrained first subtype.

gcc/ada/ChangeLog:

* exp_util.adb (Is_Expression_Of_Func_Return): New predicate.
(Is_Related_To_Func_Return): Call Is_Expression_Of_Func_Return.
(Remove_Side_Effects): Generate a temporary for a function call
that returns a constrained array type with controlled component
and an unconstrained first subtype.

4 weeks agoada: Remove wrong optimization in frontend inlining of procedure calls
Piotr Trojanek [Tue, 29 Apr 2025 08:34:04 +0000 (10:34 +0200)] 
ada: Remove wrong optimization in frontend inlining of procedure calls

When using obsolete frontend inlining (switch -gnatN), we must always rewrite
the procedure call into a single block node. Otherwise, the copy-back of
parameters passed by-copy is inserted before the inlined procedure body, which
causes wrong code to be generated.

gcc/ada/ChangeLog:

* inline.adb (Rewrite_Procedure_Call): Replace with a simple rewriting
of procedure call into a single block node, i.e. remove broken
optimization.
* sem_util.adb (Next_Actual): Adapt GNATprove-specific code that peeks
into inlined calls.

4 weeks agoada: Minor fix in handling of inherited Pre/Post'Class aspect
Martin Clochard [Tue, 29 Apr 2025 09:36:19 +0000 (11:36 +0200)] 
ada: Minor fix in handling of inherited Pre/Post'Class aspect

Mapping of calls to primitive functions in Pre/Post'Class aspects
inherited by derived types was only testing against controlling formals
of the parent subprogram. This lead to missing some calls, because formals
could be rewritten to that of the derived subprogram before the test
happens.

gcc/ada/ChangeLog:

* exp_util.adb (Is_Controlling_Formal_Ref): test scope against
derived subprogram as well.

4 weeks agoada: Fix detecting Compilation_Errors
Viljar Indus [Mon, 28 Apr 2025 10:35:21 +0000 (13:35 +0300)] 
ada: Fix detecting Compilation_Errors

Subprogram Compilation_Errors is used to check whether any
errors have been detected during the compilation process. It
relies on Total_Errors_Detected and Warnings_Treated_As_Errors
counts. Total_Erros_Detected are updated immidiatelly after
the error objects have been created. Warnings_Treated_As_Errors
were updated only when the messages are being printed.

This leads to a situation where we do not have the correct count
of Warnings_Treated_As_Errors unless the errors have been printed.

gcc/ada/ChangeLog:

* errout.adb (Error_Msg_Internal): Relocate Warn_As_Err propagation
to Increase_Error_Msg_Counti.
(Delete_Warning_And_Continuations): Update
Warnings_Treated_As_Errors count.
(Delete_Warning): Likewise.
(To_Be_Removed): Likewise.
* erroutc.adb (Increase_Error_Msg_Count): Count warnings treated
as errors here and perform the propagation of this property to
the parent message.
(Output_Msg_Text): Remove counting of warnings as errors from
here.
(Decrease_Error_Msg_Count): Update Warnings_Treated_As_Errors
count.

4 weeks agolibphobos: Fully enable Darwin/i386 support
Rainer Orth [Tue, 1 Jul 2025 08:22:06 +0000 (10:22 +0200)] 
libphobos: Fully enable Darwin/i386 support

I recently noticed that libphobos isn't enable by default on 32-bit
Darwin with the target triples determined by config.guess.  E.g. on a
Darwin 15 system the target triple is something like
i386-apple-darwin15.6.0 while configure.tgt only matches
i?86-*-darwin1[2-7].

This patch also allows such minor and micro versions.

Tested on i386-apple-darwin15.6.0.

2025-06-30  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>

libphobos:
* configure.tgt <i?86-*-darwin1[2-7]>: Also consider minor
versions supported.

4 weeks agoFix "void debug (const tree_node *ptr)"
H.J. Lu [Tue, 1 Jul 2025 00:14:09 +0000 (08:14 +0800)] 
Fix "void debug (const tree_node *ptr)"

Calling "debug (const tree_node *ptr)" does nothing.  Change it to
call debug_tree so that we can do this in gdb:

(gdb) whatis type
type = const_tree
(gdb) call debug (type)
 <real_type 0x7fffe982f2a0 float sizes-gimplified SF
    size <integer_cst 0x7fffe98204e0 type <integer_type 0x7fffe98280a8 bitsizetype> constant 32>
    unit-size <integer_cst 0x7fffe98204f8 type <integer_type 0x7fffe9828000 sizetype> constant 4>
    align:32 warn_if_not_align:0 symtab:0 alias-set -1 canonical-type 0x7fffe982f2a0 precision:32
    pointer_to_this <pointer_type 0x7fffe982f930>>
(gdb)

PR debug/120902
* print-tree.cc (debug with const tree_node *): Call debug_tree
instead of debug.

Signed-off-by: H.J. Lu <hjl.tools@gmail.com>
4 weeks agogcc: middle-end opt for trigonometric pi-based functions builtins
Yuao Ma [Tue, 1 Jul 2025 07:50:28 +0000 (09:50 +0200)] 
gcc: middle-end opt for trigonometric pi-based functions builtins

This patch partially handled PR118592.

This patch builds upon r16-710-g591d3d02664c7b and r16-711-g89935d56f768b4.  It
introduces middle-end optimizations, such as constant folding, for our
trigonometric pi-based function built-ins.

gcc/ChangeLog:
* fold-const-call.cc (fold_const_call_ss): Constant fold for
single arg pi-based trigonometric builtins.
(fold_const_call_sss): Constant fold for double arg pi-based
trigonometric builtins.
* fold-const.cc (negate_mathfn_p): asinpi/atanpi is odd func.
(tree_call_nonnegative_warnv_p): acospi always non-neg,
asinpi/atanpi non-neg iff arg non-neg.
* tree-call-cdce.cc (can_test_argument_range): Add acospi/asinpi.
(edom_only_function): Add acospi/asinpi/cospi/sinpi.
(get_no_error_domain): Add acospi/asinpi.

gcc/testsuite/ChangeLog:

* lib/target-supports.exp (foldable_pi_based_trigonometry): New
effective target.
* gcc.dg/torture/builtin-math-9.c: New test.

Signed-off-by: Yuao Ma <c8ef@outlook.com>
4 weeks ago[testsuite] restore default action from dfp.exp [PR120631]
Alexandre Oliva [Tue, 1 Jul 2025 00:27:15 +0000 (21:27 -0300)] 
[testsuite] restore default action from dfp.exp [PR120631]

dfp.exp tests for dfprt before deciding whether to default to run or
compile, and the PR120631 tests override that without checking for
dfprt.  Rework them to avoid attempting to link and run programs
when dfp runtime support isn't available.

for  gcc/testsuite/ChangeLog

PR middle-end/120631
* gcc.dg/dfp/pr120631.c: Drop overrider of dg-do default action.
* gcc.dg/dfp/bitint-9.c: Likewise.
* gcc.dg/dfp/bitint-10.c: Likewise.

4 weeks agoDaily bump.
GCC Administrator [Tue, 1 Jul 2025 00:19:55 +0000 (00:19 +0000)] 
Daily bump.

4 weeks agocobol: Revise diagnostic linemap management.
James K. Lowden [Mon, 30 Jun 2025 20:51:49 +0000 (16:51 -0400)] 
cobol: Revise diagnostic linemap management.

Update linemap filename before location in both parsers.  Rely on
parser to update linemap. Lexer maintains location. Various small
syntax corrections and extensions.

PR cobol/120772
PR cobol/120779
PR cobol/120790
PR cobol/120791
PR cobol/120794

gcc/cobol/ChangeLog:

* gcobc: Supply -fPIC for shared objects.
* genapi.cc (linemap_add): Delete empty macro.
(parser_enter_file): Do not call linemap_add.
(parser_leave_file): Same.
* gengen.cc (location_from_lineno): Remove function.
* lexio.cc (parse_replacing_term): Allow empty term.
(cdftext::process_file): Always append to output.
(cdftext::segment_line): Output #line directives.
* lexio.h (struct span_t): Count lines in span.
* parse.y: Revamp REPOSITORY, and minor syntax extensions.
* parse_ante.h (input_file_status_notify): Update linemap filename before location.
(intrinsic_token_of): Declare.
(parser_move_carefully): Support MOVE pointer.
* parse_util.h (intrinsic_token_of): New function.
* scan.l: New EOF logic, accept NOT=, own yylloc and yylineno.
* scan_ante.h (class enter_leave_t): Do not store newline count.
(cdf_location_set): Remove declaration.
(ydfltype_of): New function.
(update_location): Accept location parameter.
(reset_location): New function.
(YY_USER_ACTION): Use update_location().
(YY_USER_INIT): Update CDF location.
(verify_ws): New function.
(wait_for_the_child): Removed.
* symbols.h (cobol_fileline_set): return line number.
* util.cc (valid_move): Use range-based for loop.
(struct input_file_t): Remove line_map pointer.
(class unique_stack): New peek() member function.
(cobol_lineno_save): Rename to overload cobol_lineno().
(cobol_lineno): Replaces cobol_lineno_save().
(cobol_filename): Return void.
(location_from_lineno): New function used by genapi.cc.
(cdf_location_set): Remove.
(matched_length): No change.
(cobol_fileline_set): Return line number.
(fisspace): Remove extra semicolon.
(fisprint): Same.
* util.h (cobol_filename_restore): Return void.
(cobol_lineno_save): Remove declaration.
(cobol_lineno): Declare.

4 weeks ago[committed] [PR rtl-optimization/120242] Fix SUBREG_PROMOTED_VAR_P after ext-dce...
Jeff Law [Mon, 30 Jun 2025 20:38:33 +0000 (14:38 -0600)] 
[committed] [PR rtl-optimization/120242] Fix SUBREG_PROMOTED_VAR_P after ext-dce's actions

I've gone back and forth of these problems multiple times.  We have two passes,
ext-dce and combine which eliminate extensions using totally different
mechanisms.

ext-dce looks for cases where the state of upper bits in an object aren't
observable and if they aren't observable, then eliminates extensions which set
those bits.

combine looks for cases where we know the state of the upper bits and can prove
an extension is just setting those bits to their prior value.  Combine also
looks for cases where the precise extension isn't really important, just the
knowledge that the upper bits are zero or sign extended from a narrower mode
is needed.

Combine relies heavily on the SUBREG_PROMOTED_VAR state to do its job.  If the
actions of ext-dce (or any other pass for that matter) make
SUBREG_PROMOTED_VAR's state inconsistent with combine's expectations, then
combine can end up generating incorrect code.

--

When ext-dce eliminates an extension and turns it into a subreg copy (without
any known SUBREG_PROMOTED_VAR state).  Since we can no longer guarantee the
destination object has any known extension state, we scurry around and wipe
SUBREG_PROMOTED_VAR state for the destination object.

That's fine and dandy, but ultimately insufficient.  Consider if the
destination of the optimized extension was used as a source in a simple copy
insn.  Furthermore assume that the destination of that copy is used within a
SUBREG expression with SUBREG_PROMOTED_VAR set.  ext-dce's actions have
clobbered the SUBREG_PROMOTED_VAR state on the destination of that copy, albeit
indirectly.

This patch addresses this problem by taking the set of pseudos directly
impacted by ext-dce's actions and expands that set by building a transitive
closure for pseudos connected via copies.  We then scurry around finding
SUBREG_PROMOTED_VAR state to wipe for everything in that expanded set of
pseudos.  Voila, everything just works.

--

The other approach here would be to further expand the liveness sets inside
ext-dce.  That's a simpler path forward, but ultimately regresses the quality
of codes we do care about.

One good piece of news is that with the transitive closure bits in place, we
can eliminate a bit of the live set expansion we had in place for
SUBREG_PROMOTED_VAR objects.

--

So let's take one case of the 5 that have been reported.

In ext-dce we have this insn:

> (insn 29 27 30 3 (set (reg:DI 134 [ al_lsm.9 ])
>         (zero_extend:DI (subreg:HI (reg:DI 162) 0))) "j.c":17:17 552 {*zero_extendhidi2_bitmanip}
>      (expr_list:REG_DEAD (reg:DI 162)
>         (nil)))

There are reachable uses of (reg 134):

> (insn 49 47 52 6 (set (mem/c:HI (lo_sum:DI (reg/f:DI 186)
>                 (symbol_ref:DI ("al") [flags 0x86]  <var_decl 0x7ffff73c2da8 al>)) [2 al+0 S2 A16])
>         (subreg/s/v:HI (reg:DI 134 [ al_lsm.9 ]) 0)) 279 {*movhi_internal}
>      (expr_list:REG_DEAD (reg/f:DI 186)
>         (nil)))Obviously safe if we were to remove the extension.

> (insn 52 49 53 6 (set (reg:DI 176)
>         (and:DI (reg:DI 134 [ al_lsm.9 ])
>             (const_int 5 [0x5]))) "j.c":21:12 106 {*anddi3}
>      (expr_list:REG_DEAD (reg:DI 134 [ al_lsm.9 ])
>         (nil)))
> (insn 53 52 56 6 (set (reg:SI 177 [ _8 ])
>         (zero_extend:SI (subreg:HI (reg:DI 176) 0))) "j.c":21:12 551 {*zero_extendhisi2_bitmanip}
>      (expr_list:REG_DEAD (reg:DI 176)
>         (nil))) Safe to remove the extension as we only read the low 16 bits from the destination register (reg 176) in insn 53.

> (insn 27 26 29 3 (set (reg:DI 162)
>         (sign_extend:DI (plus:SI (subreg/s/v:SI (reg:DI 134 [ al_lsm.9 ]) 0)
>                 (const_int 1 [0x1])))) "j.c":17:17 8 {addsi3_extended}
>      (expr_list:REG_DEAD (reg:DI 134 [ al_lsm.9 ])
>         (nil)))
> (insn 29 27 30 3 (set (reg:DI 134 [ al_lsm.9 ])
>         (zero_extend:DI (subreg:HI (reg:DI 162) 0))) "j.c":17:17 552 {*zero_extendhidi2_bitmanip}
>      (expr_list:REG_DEAD (reg:DI 162)
>         (nil)))

Again, not as obvious as the first case, but we only read the low 16 bits from
(reg 162) in insn 29.  So those upper bits in (reg 134) don't matter.

> (insn 26 92 27 3 (set (reg:DI 144 [ ivtmp.17 ])
>         (reg:DI 134 [ al_lsm.9 ])) 277 {*movdi_64bit}
>      (nil))
> (insn 30 29 31 3 (set (reg:DI 135 [ al.2_3 ])
>         (sign_extend:DI (subreg/s/v:HI (reg:DI 144 [ ivtmp.17 ]) 0))) "j.c":17:9 558 {*extendhidi2_bitmanip}
>      (expr_list:REG_DEAD (reg:DI 144 [ ivtmp.17 ])
>         (nil)))Also safe in isolation.  But worth noting that if we remove the extension at insn 29, then the promoted status on (reg:DI 144) in insn 30 is no longer valid.

Setting aside the promoted state of (reg:DI 144) at insn 30 for a minute, let's
look into combine.

> (insn 26 92 27 3 (set (reg:DI 144 [ ivtmp.17 ])
>         (reg:DI 134 [ al_lsm.9 ])) 277 {*movdi_64bit}
>      (nil))   [ ... ]
> (insn 30 29 31 3 (set (reg:DI 135 [ al.2_3 ])
>         (sign_extend:DI (subreg/s/v:HI (reg:DI 144 [ ivtmp.17 ]) 0))) "j.c":17:9 558 {*extendhidi2_bitmanip}
>      (expr_list:REG_DEAD (reg:DI 144 [ ivtmp.17 ])
>         (nil)))
> (jump_insn 31 30 32 3 (set (pc)
>         (if_then_else (eq (reg:DI 135 [ al.2_3 ])
>                 (const_int 0 [0]))
>             (label_ref:DI 41)
>             (pc))) "j.c":4:55 371 {*branchdi}
>      (int_list:REG_BR_PROB 536870913 (nil))
>  -> 41)

Combine will do its thing on insns 30/31.  Essentially the sign extension is
not necessary in this context, assuming the promoted subreg status in insn 30
-- the equality test doesn't really care about the kind of extension, just
knowing the value is extended is enough to safely elide the extension.

And now we've come to the crux the problem.  That promotion state needs to be
adjusted.  The new ext-dce code will see that copy at insn 26 and add (reg 144)
to the set of registers that need promotion state wiped.  And everything is
happy after that.

The other cases are similar in nature.

--

This has been bootstrapped and regression tested on x86_64 and aarch64.
Variants have bootstrapped & regression tested on several other platforms and
it's survived testing on the crosses as well.

Pushing to the trunk...

PR rtl-optimization/120242
PR rtl-optimization/120627
PR rtl-optimization/120736
PR rtl-optimization/120813
gcc/

* ext-dce.cc (ext_dce_process_uses): Remove some cases where we
unnecessarily expanded live sets for promoted subregs.
(expand_changed_pseudos): New function.
(reset_subreg_promoted_p): Use it.

gcc/testsuite/

* gcc.dg/torture/pr120242.c: New test.
* gcc.dg/torture/pr120627.c: Likewise.
* gcc.dg/torture/pr120736.c: Likewise.
* gcc.dg/torture/pr120813.c: Likewise.

4 weeks ago[RISC-V] Correct CFA notes for stack-clash protection [PR120714]
Alexey Merzlyakov [Mon, 30 Jun 2025 19:58:29 +0000 (13:58 -0600)] 
[RISC-V] Correct CFA notes for stack-clash protection [PR120714]

Fixes incorrect SP-addresses used in CFA notes for the stack probes
unrelative to the frame's top. It applied to the RISC-V targets code
generation when the stack-clash protection is enabled.

PR target/120714
gcc/ChangeLog:

* config/riscv/riscv.cc (riscv_allocate_and_probe_stack_space):
Fix SP-addresses in REG_CFA_DEF_CFA notes for stack-clash case.

gcc/testsuite/ChangeLog:

* gcc.target/riscv/pr120714.c: New test.

4 weeks agoanalyzer: use nullptr rather than NULL
David Malcolm [Mon, 30 Jun 2025 19:05:20 +0000 (15:05 -0400)] 
analyzer: use nullptr rather than NULL

Modernization; no functional change intended.

gcc/analyzer/ChangeLog:
* access-diagram.cc: Use nullptr rather than NULL where
appropriate.
* analyzer-language.cc: Likewise.
* analyzer-language.h: Likewise.
* analyzer-logging.h: Likewise.
* analyzer-pass.cc: Likewise.
* analyzer.cc: Likewise.
* bounds-checking.cc: Likewise.
* call-details.cc: Likewise.
* call-string.cc: Likewise.
* call-string.h: Likewise.
* call-summary.cc: Likewise.
* checker-event.cc: Likewise.
* common.h: Likewise.
* constraint-manager.cc: Likewise.
* constraint-manager.h: Likewise.
* diagnostic-manager.cc: Likewise.
* engine.cc: Likewise.
* exploded-graph.h: Likewise.
* function-set.cc: Likewise
* infinite-recursion.cc: Likewise
* inlining-iterator.h: Likewise
* kf.cc: Likewise
* known-function-manager.cc: Likewise
* pending-diagnostic.cc: Likewise
* program-point.cc: Likewise
* program-point.h: Likewise
* program-state.cc: Likewise
* program-state.h: Likewise
* record-layout.cc: Likewise
* region-model-asm.cc: Likewise
* region-model-manager.cc: Likewise
* region-model-manager.h: Likewise
* region-model-reachability.cc: Likewise
* region-model.cc: Likewise
* region-model.h: Likewise
* region.cc: Likewise
* region.h: Likewise
* sm-fd.cc: Likewise
* sm-malloc.cc: Likewise
* sm-pattern-test.cc: Likewise
* sm-signal.cc: Likewise
* sm-taint.cc: Likewise
* sm.cc: Likewise
* sm.h: Likewise
* state-purge.cc: Likewise
* state-purge.h: Likewise
* store.cc: Likewise
* store.h: Likewise
* supergraph.cc: Likewise
* supergraph.h: Likewise
* svalue.cc: Likewise
* svalue.h: Likewise
* varargs.cc: Likewise

Signed-off-by: David Malcolm <dmalcolm@redhat.com>
4 weeks agodiagnostics: use nullptr rather than NULL
David Malcolm [Mon, 30 Jun 2025 19:05:14 +0000 (15:05 -0400)] 
diagnostics: use nullptr rather than NULL

Modernization; no functional change intended.

gcc/ChangeLog:
* diagnostic-color.cc: Use nullptr rather than NULL.
* diagnostic-format-sarif.cc: Likewise.
* diagnostic-format-text.cc: Likewise.
* diagnostic-macro-unwinding.cc: Likewise.
* diagnostic-path-output.cc: Likewise.
* diagnostic-path.cc: Likewise.
* diagnostic-show-locus.cc: Likewise.
* diagnostic-spec.cc: Likewise.
* diagnostic.cc: Likewise.
* lazy-diagnostic-path.cc: Likewise.
* simple-diagnostic-path.cc: Likewise.
* tree-diagnostic-client-data-hooks.cc: Likewise.

Signed-off-by: David Malcolm <dmalcolm@redhat.com>
4 weeks agodiagnostics: convert diagnostic_event::meaning enums to enum class
David Malcolm [Mon, 30 Jun 2025 19:05:07 +0000 (15:05 -0400)] 
diagnostics: convert diagnostic_event::meaning enums to enum class

Modernization; no functional change intended.

gcc/analyzer/ChangeLog:
* checker-event.cc (function_entry_event::get_meaning): Convert
diagnostic_event::meaning enums to enum class.
(cfg_edge_event::get_meaning): Likewise.
(call_event::get_meaning): Likewise.
(return_event::get_meaning): Likewise.
(start_consolidated_cfg_edges_event::get_meaning): Likewise.
(inlined_call_event::get_meaning): Likewise.
(warning_event::get_meaning): Likewise.
* sm-fd.cc (fd_diagnostic::get_meaning_for_state_change):
Likewise.
* sm-file.cc (file_diagnostic::get_meaning_for_state_change):
Likewise.
* sm-malloc.cc (malloc_diagnostic::get_meaning_for_state_change):
Likewise.
* sm-sensitive.cc
(exposure_through_output_file::get_meaning_for_state_change):
Likewise.
* sm-taint.cc (taint_diagnostic::get_meaning_for_state_change):
Likewise.
* varargs.cc
(va_list_sm_diagnostic::get_meaning_for_state_change): Likewise.

gcc/ChangeLog:
* diagnostic-format-sarif.cc
(sarif_builder::maybe_make_kinds_array): Convert
diagnostic_event::meaning enums to enum class.
* diagnostic-path-output.cc (path_label::get_text): Likewise.
* diagnostic-path.cc
(diagnostic_event::meaning::maybe_get_verb_str): Likewise.
(diagnostic_event::meaning::maybe_get_noun_str): Likewise.
(diagnostic_event::meaning::maybe_get_property_str): Likewise.
* diagnostic-path.h (diagnostic_event::verb): Likewise.
(diagnostic_event::noun): Likewise.
(diagnostic_event::property): Likewise.
(diagnostic_event::meaning): Likewise.

gcc/testsuite/ChangeLog:
* gcc.dg/plugin/analyzer_gil_plugin.cc
(gil_diagnostic::get_meaning_for_state_change): Convert
diagnostic_event::meaning enums to enum class.

Signed-off-by: David Malcolm <dmalcolm@redhat.com>
4 weeks agodiagnostics: remove "json" output format
David Malcolm [Mon, 30 Jun 2025 19:04:55 +0000 (15:04 -0400)] 
diagnostics: remove "json" output format

The "json" output format for diagnostics was deprecated in GCC 15, with
advice to users seeking machine-readable diagnostics from GCC to use
SARIF instead.

This patch eliminates it from GCC 16, simplifying the diagnostics
subsystem somewhat.

Note that the Ada frontend seems to have its own implementation of this
in errout.adb (Output_JSON_Message), and documented in
gnat_ugn.texi.  This patch does not touch Ada.

gcc/ChangeLog:
* Makefile.in (OBJS-libcommon): Drop diagnostic-format-json.o.
* common.opt (fdiagnostics-format=): Drop
"json|json-stderr|json-file".
(diagnostics_output_format): Drop values "json", "json-stderr",
and "json-file".
* diagnostic-format-json.cc: Delete file.
* diagnostic-format.h
(diagnostic_output_format_init_json_stderr): Delete.
(diagnostic_output_format_init_json_file): Delete.
* diagnostic.cc (diagnostic_output_format_init): Delete cases for
DIAGNOSTICS_OUTPUT_FORMAT_JSON_STDERR and
DIAGNOSTICS_OUTPUT_FORMAT_JSON_FILE.
* diagnostic.h (DIAGNOSTICS_OUTPUT_FORMAT_JSON_STDERR): Delete.
(DIAGNOSTICS_OUTPUT_FORMAT_JSON_FILE): Delete.
* doc/invoke.texi: Remove references to json output format.
* doc/ux.texi: Likewise.
* selftest-run-tests.cc (selftest::run_tests): Drop call to
deleted selftest::diagnostic_format_json_cc_tests.
* selftest.h (selftest::diagnostic_format_json_cc_tests): Delete.

gcc/testsuite/ChangeLog:
* c-c++-common/analyzer/out-of-bounds-diagram-1-json.c: Deleted test.
* c-c++-common/diagnostic-format-json-1.c: Deleted test.
* c-c++-common/diagnostic-format-json-2.c: Deleted test.
* c-c++-common/diagnostic-format-json-3.c: Deleted test.
* c-c++-common/diagnostic-format-json-4.c: Deleted test.
* c-c++-common/diagnostic-format-json-5.c: Deleted test.
* c-c++-common/diagnostic-format-json-file-1.c: Deleted test.
* c-c++-common/diagnostic-format-json-stderr-1.c: Deleted test.
* c-c++-common/pr106133.c: Deleted test.
* g++.dg/pr90462.C: Deleted test.
* gcc.dg/plugin/diagnostic-test-paths-3.c: Deleted test.
* gcc.dg/plugin/plugin.exp (plugin_test_list): Remove deleted
test.
* gfortran.dg/diagnostic-format-json-1.F90: Deleted test.
* gfortran.dg/diagnostic-format-json-2.F90: Deleted test.
* gfortran.dg/diagnostic-format-json-3.F90: Deleted test.
* gfortran.dg/diagnostic-format-json-pr105916.F90: Deleted test.

Signed-off-by: David Malcolm <dmalcolm@redhat.com>
4 weeks agoRegenerate common.opt.urls
Mark Wielaard [Mon, 30 Jun 2025 17:05:36 +0000 (19:05 +0200)] 
Regenerate common.opt.urls

When -fauto-profile-inlining was added it was documented, but
common.opt.urls wasn't regenerated.

Fixes: aaf55e09b3d9 ("Add -fauto-profile-inlining")
gcc/ChangeLog:

* common.opt.urls: Regenerate.

4 weeks agoAda: Provide fallback for GNATMAKE_FOR_BUILD Makefile variable
Eric Botcazou [Mon, 30 Jun 2025 16:57:27 +0000 (18:57 +0200)] 
Ada: Provide fallback for GNATMAKE_FOR_BUILD Makefile variable

The variable is set only at the top level.

gcc/ada/
PR ada/120106
* Make-generated.in (GNATMAKE_FOR_BUILD): Define.

4 weeks agoivopts: Fix scan-assembler-not regexes for aarch64/sve test
Christopher Bazley [Mon, 30 Jun 2025 15:59:56 +0000 (16:59 +0100)] 
ivopts: Fix scan-assembler-not regexes for aarch64/sve test

The test added by r16-1671-ge7ff8e8d77df74 passed despite using
regular expressions that would never match real assembly language
output from the compiler. Because the regular expressions were not
expected to match, and didn't, this was not noticeable; however,
it also made that part of the test useless.

The regular expressions have been fixed. Verified that the fixed
regular expressions do match assembly language output produced by
the compiler before the changes to ivopts in commit e7ff8e8d77d,
but do not match assembly language output produced by the compiler
after the changes to ivopts.

gcc/testsuite/ChangeLog:

* gcc.target/aarch64/sve/adr_7.c: Fix regular expressions.

4 weeks agoRISC-V: Add test for vec_duplicate + vssubu.vv combine case 1 with GR2VR cost 0,...
Pan Li [Fri, 27 Jun 2025 01:09:08 +0000 (09:09 +0800)] 
RISC-V: Add test for vec_duplicate + vssubu.vv combine case 1 with GR2VR cost 0, 1 and 2

Add asm dump check test for vec_duplicate + vssubu.vv combine to
vssubu.vx, with the GR2VR cost is 0, 1 and 2.

gcc/testsuite/ChangeLog:

* gcc.target/riscv/rvv/autovec/vx_vf/vx-4-u16.c: Add asm check
for vssubu.vx combine.
* gcc.target/riscv/rvv/autovec/vx_vf/vx-4-u32.c: Ditto.
* gcc.target/riscv/rvv/autovec/vx_vf/vx-4-u64.c: Ditto.
* gcc.target/riscv/rvv/autovec/vx_vf/vx-4-u8.c: Ditto.
* gcc.target/riscv/rvv/autovec/vx_vf/vx-5-u16.c: Ditto.
* gcc.target/riscv/rvv/autovec/vx_vf/vx-5-u32.c: Ditto.
* gcc.target/riscv/rvv/autovec/vx_vf/vx-5-u64.c: Ditto.
* gcc.target/riscv/rvv/autovec/vx_vf/vx-5-u8.c: Ditto.
* gcc.target/riscv/rvv/autovec/vx_vf/vx-6-u16.c: Ditto.
* gcc.target/riscv/rvv/autovec/vx_vf/vx-6-u32.c: Ditto.
* gcc.target/riscv/rvv/autovec/vx_vf/vx-6-u64.c: Ditto.
* gcc.target/riscv/rvv/autovec/vx_vf/vx-6-u8.c: Ditto.

Signed-off-by: Pan Li <pan2.li@intel.com>
4 weeks agoRISC-V: Add test for vec_duplicate + vssubu.vv combine case 0 with GR2VR cost 0,...
Pan Li [Fri, 27 Jun 2025 01:06:38 +0000 (09:06 +0800)] 
RISC-V: Add test for vec_duplicate + vssubu.vv combine case 0 with GR2VR cost 0, 2 and 15

Add asm dump check and run test for vec_duplicate + vssubu.vv
combine to vssubu.vx, with the GR2VR cost is 0, 2 and 15.

gcc/testsuite/ChangeLog:

* gcc.target/riscv/rvv/autovec/vx_vf/vx-1-u16.c: Add asm check.
* gcc.target/riscv/rvv/autovec/vx_vf/vx-1-u32.c: Ditto.
* gcc.target/riscv/rvv/autovec/vx_vf/vx-1-u64.c: Ditto.
* gcc.target/riscv/rvv/autovec/vx_vf/vx-1-u8.c: Ditto.
* gcc.target/riscv/rvv/autovec/vx_vf/vx-2-u16.c: Ditto.
* gcc.target/riscv/rvv/autovec/vx_vf/vx-2-u32.c: Ditto.
* gcc.target/riscv/rvv/autovec/vx_vf/vx-2-u64.c: Ditto.
* gcc.target/riscv/rvv/autovec/vx_vf/vx-2-u8.c: Ditto.
* gcc.target/riscv/rvv/autovec/vx_vf/vx-3-u16.c: Ditto.
* gcc.target/riscv/rvv/autovec/vx_vf/vx-3-u32.c: Ditto.
* gcc.target/riscv/rvv/autovec/vx_vf/vx-3-u64.c: Ditto.
* gcc.target/riscv/rvv/autovec/vx_vf/vx-3-u8.c: Ditto.
* gcc.target/riscv/rvv/autovec/vx_vf/vx_binary.h: Add test
helper macros.
* gcc.target/riscv/rvv/autovec/vx_vf/vx_binary_data.h: Add test
data for run test.
* gcc.target/riscv/rvv/autovec/vx_vf/vx_vssub-run-1-u16.c: New test.
* gcc.target/riscv/rvv/autovec/vx_vf/vx_vssub-run-1-u32.c: New test.
* gcc.target/riscv/rvv/autovec/vx_vf/vx_vssub-run-1-u64.c: New test.
* gcc.target/riscv/rvv/autovec/vx_vf/vx_vssub-run-1-u8.c: New test.

Signed-off-by: Pan Li <pan2.li@intel.com>
4 weeks agoRISC-V: Reconcile the existing test due to cost model change
Pan Li [Fri, 27 Jun 2025 03:35:18 +0000 (11:35 +0800)] 
RISC-V: Reconcile the existing test due to cost model change

The cost model change will make the default cost of vx to 2, thus
reconcile the asm check for this change.

gcc/testsuite/ChangeLog:

* gcc.target/riscv/rvv/autovec/sat/vec_sat_u_sub_trunc-1-u16.c:
Update the asm check due to cost model change.
* gcc.target/riscv/rvv/autovec/sat/vec_sat_u_sub_trunc-1-u32.c:
Diito.
* gcc.target/riscv/rvv/autovec/sat/vec_sat_u_sub_trunc-1-u8.c:
Ditto.

Signed-off-by: Pan Li <pan2.li@intel.com>
4 weeks agoRISC-V: Combine vec_duplicate + vssubu.vv to vssubu.vx on GR2VR cost
Pan Li [Fri, 27 Jun 2025 01:02:03 +0000 (09:02 +0800)] 
RISC-V: Combine vec_duplicate + vssubu.vv to vssubu.vx on GR2VR cost

This patch would like to combine the vec_duplicate + vssubu.vv to the
vssubu.vx.  From example as below code.  The related pattern will depend
on the cost of vec_duplicate from GR2VR.  Then the late-combine will
take action if the cost of GR2VR is zero, and reject the combination
if the GR2VR cost is greater than zero.

Assume we have example code like below, GR2VR cost is 0.

  #define DEF_VX_BINARY(T, FUNC)                                      \
  void                                                                \
  test_vx_binary (T * restrict out, T * restrict in, T x, unsigned n) \
  {                                                                   \
    for (unsigned i = 0; i < n; i++)                                  \
      out[i] = FUNC (in[i], x);                                       \
  }

  T sat_sub(T a, T b)
  {
    return (a - b) & (-(T)(a >= b));
  }

  DEF_VX_BINARY(uint32_t, sat_sub)

Before this patch:
  10   â”‚ test_vx_binary_or_int32_t_case_0:
  11   â”‚     beq a3,zero,.L8
  12   â”‚     vsetvli a5,zero,e32,m1,ta,ma
  13   â”‚     vmv.v.x v2,a2
  14   â”‚     slli    a3,a3,32
  15   â”‚     srli    a3,a3,32
  16   â”‚ .L3:
  17   â”‚     vsetvli a5,a3,e32,m1,ta,ma
  18   â”‚     vle32.v v1,0(a1)
  19   â”‚     slli    a4,a5,2
  20   â”‚     sub a3,a3,a5
  21   â”‚     add a1,a1,a4
  22   â”‚     vssubu.vv v1,v1,v2
  23   â”‚     vse32.v v1,0(a0)
  24   â”‚     add a0,a0,a4
  25   â”‚     bne a3,zero,.L3

After this patch:
  10   â”‚ test_vx_binary_or_int32_t_case_0:
  11   â”‚     beq a3,zero,.L8
  12   â”‚     slli    a3,a3,32
  13   â”‚     srli    a3,a3,32
  14   â”‚ .L3:
  15   â”‚     vsetvli a5,a3,e32,m1,ta,ma
  16   â”‚     vle32.v v1,0(a1)
  17   â”‚     slli    a4,a5,2
  18   â”‚     sub a3,a3,a5
  19   â”‚     add a1,a1,a4
  20   â”‚     vssubu.vx v1,v1,a2
  21   â”‚     vse32.v v1,0(a0)
  22   â”‚     add a0,a0,a4
  23   â”‚     bne a3,zero,.L3

gcc/ChangeLog:

* config/riscv/riscv-v.cc (expand_vx_binary_vec_vec_dup): Add
new case US_MINUS.
* config/riscv/riscv.cc (riscv_rtx_costs): Ditto.
* config/riscv/vector-iterators.md: Add new op us_minus.

Signed-off-by: Pan Li <pan2.li@intel.com>
4 weeks agoada: Fix Execution_Successful value with exceptions
Viljar Indus [Thu, 24 Apr 2025 10:14:40 +0000 (13:14 +0300)] 
ada: Fix Execution_Successful value with exceptions

Store the Exit_Code value and use that to generate
the Exceution_Successful value in the SARIF report.

gcc/ada/ChangeLog:

* comperr.adb (Compiler_Abort): Pass the exit code in calls to
Output_Messages.
* errout.adb (Output_Messages): Add new parameter for the
Exit_Code and store its value.
* errout.ads (Output_Messages): Likewise.
* erroutc-sarif_emitter.adb (Print_Invocations): Set
Execution_Successful based on the exit code.
* erroutc.ads (Exit_Code): Store the exit code value.
* gnat1drv.adb (Gnat1drv): Pass the exit code in calls to
Output_Messages.
* prepcomp.adb (Parse_Preprocessing_Data_File, Prpare_To_Preprocess):
Likewise.

4 weeks agoada: Refine use of Has_Exit
Ronan Desplanques [Tue, 29 Apr 2025 08:26:50 +0000 (10:26 +0200)] 
ada: Refine use of Has_Exit

The description of the Has_Exit field in Einfo makes it pretty clear
that it can only be meaningful for loop entities. It was however defined
in all entities until this patch, which restricts this field to E_Loop.

gcc/ada/ChangeLog:

* gen_il-gen-gen_entities.adb (Gen_Entities): Tweak Has_Exit.

4 weeks agoada: Make class-wide Max_Size_In_Storage_Elements return a large value
Bob Duff [Tue, 29 Apr 2025 17:12:44 +0000 (13:12 -0400)] 
ada: Make class-wide Max_Size_In_Storage_Elements return a large value

Max_Size_In_Storage_Elements is supposed to return a value greater or
equal to what is passed for any heap allocation for an object of the
type. For a tagged type T, we don't know the allocation size for
descendants; therefore T'Class'Max_Size_In_Storage_Elements should
return a huge number. In particular, it now returns Storage_Count'Last,
which is greater than any possible heap allocation.

Previously, T'Class'Max_Size_In_Storage_Elements was returning
the same value as T'Max_Size_In_Storage_Elements, which was
wrong.

gcc/ada/ChangeLog:

* exp_attr.adb (Attribute_Max_Size_In_Storage_Elements):
Return Storage_Count'Last converted to universal_integer.

4 weeks agoada: Add documentation of implemented Ada 2022 features
Tonu Naks [Fri, 28 Mar 2025 12:41:29 +0000 (12:41 +0000)] 
ada: Add documentation of implemented Ada 2022 features

gcc/ada/ChangeLog:

* doc/gnat_rm.rst: add entry point for the new chapter
* doc/gnat_rm/about_this_guide.rst: add reference to the new
chapter
* doc/gnat_rm/implementation_of_ada_2022_features.rst: new file
* doc/gnat_rm/implementation_of_ada_2012_features.rst: update
explanation about RM references
* gnat_rm.texi: Regenerate.
* gnat_ugn.texi: Regenerate.

4 weeks agoada: Reuse Snames classification of reserved words
Ronan Desplanques [Tue, 29 Apr 2025 12:34:47 +0000 (14:34 +0200)] 
ada: Reuse Snames classification of reserved words

Before this patch, Check_Future_Keyword had hardcoded lists of what
reserved words were introduced in what versions of the Ada language
specification. This patch makes it use the classification in Snames
instead.

gcc/ada/ChangeLog:

* par-util.adb (Check_Future_Keyword): Use Snames subtypes. Extend
comment.

4 weeks agoada: Remove obsolete comment
Ronan Desplanques [Mon, 28 Apr 2025 16:04:42 +0000 (18:04 +0200)] 
ada: Remove obsolete comment

This patch removes a comment that was left over when an exception
declaration was removed.

gcc/ada/ChangeLog:

* sem_ch5.adb (Analyze_Loop_Statement): Remove obsolete comment.

4 weeks agoada: Fix bug in -gnatw.o switch (unreferenced out parameters)
Bob Duff [Sun, 27 Apr 2025 19:15:51 +0000 (15:15 -0400)] 
ada: Fix bug in -gnatw.o switch (unreferenced out parameters)

Fixes this bug: If -gnatw.o is specified, it is ignored unless
-gnatwm is also specified (either directly, or as part of a
catch-all switch like -gnatwa).

gcc/ada/ChangeLog:

* sem_warn.adb (Warn_On_Useless_Assignments):
Enable Warn_On_Useless_Assignment in the case of
Warn_On_All_Unread_Out_Parameters.

4 weeks agoada: Remove uses of E_Void for subtype declarations
Ronan Desplanques [Mon, 28 Apr 2025 12:54:39 +0000 (14:54 +0200)] 
ada: Remove uses of E_Void for subtype declarations

This patch slightly reorganizes Analyze_Subtype_Declaration so that the
proper Ekind of the new subtype's entity is set before anything else is
done with it. A new local subprogram is introduced in the process.

gcc/ada/ChangeLog:

* sem_ch3.adb (Analyze_Subtype_Declaration): Remove uses of E_Void.
(Copy_Parent_Attributes): New procedure.

4 weeks agoada: Remove useless Set_Scope calls
Ronan Desplanques [Fri, 18 Apr 2025 10:51:33 +0000 (12:51 +0200)] 
ada: Remove useless Set_Scope calls

This patch remove calls to Set_Scope that have no effect because of
subsequent calls to Append_Entity, which calls Set_Scope itself.

gcc/ada/ChangeLog:

* cstand.adb (Make_Aliased_Component, Make_Formal, New_Operator,
Create_Standard): Remove useless calls.

4 weeks agoada: Fix missing rounding in System.Value_R.Scan_Raw_Real
Eric Botcazou [Sat, 26 Apr 2025 13:18:57 +0000 (15:18 +0200)] 
ada: Fix missing rounding in System.Value_R.Scan_Raw_Real

The extra digit returned by the function is supposed to be rounded, either
by Scan_Integral_Digits or by Scan_Decimal_Digits, but that is not the case
when it is the last digit read by Scan_Integral_Digits.

The problem is fixed by rounding it in Scan_Decimal_Digits in this case.

gcc/ada/ChangeLog:

* libgnat/s-valuer.adb (Scan_Decimal_Digits): Also pretend that the
precision limit was just reached if it was already reached.
(Scan_Integral_Digits): Add Extra_Rounded out parameter, set it to
False on entry and to True when Extra is rounded.
(Scan_Raw_Real): New Extra_Rounded local variable.  Pass it in the
calls to Scan_Integral_Digits.  If it is True, pass a dummy extra
digit to Scan_Decimal_Digits.

4 weeks agoada: Ignore ghost predicate in Ada.Strings.Superbounded
Claire Dross [Fri, 25 Apr 2025 11:29:23 +0000 (13:29 +0200)] 
ada: Ignore ghost predicate in Ada.Strings.Superbounded

Add an assertion policy to ignore the ghost predicates in
Ada.Strings.Superbounded.

gcc/ada/ChangeLog:

* libgnat/a-strsup.ads: Ignore Ghost_Predicate in the assertion policy.

4 weeks agoada: Array aggregates of mutably tagged objects
Javier Miranda [Mon, 10 Mar 2025 19:40:26 +0000 (19:40 +0000)] 
ada: Array aggregates of mutably tagged objects

When an array of mutably tagged class-wide types is initialized
with an array aggregate, the compiler erroneously rejects it
reporting that the type of the aggregate cannot be a
class-wide type. In addition, Program_Error is not raised at
runtime on array type or record type objects when they have
mutably tagged abstract class-wide type components that are
initialized by default.

gcc/ada/ChangeLog:

* sem_aggr.adb (Resolve_Record_Aggregate): Adjust the code to
handle mutably tagged class-wide types since they don't have
discriminants, but all class-wide types are considered to have
unknown discriminants. Initialize mutably tagged class-wide
type components calling their IP subprogram.
* exp_aggr.adb (Gen_Assign): Handle mutably tagged class-wide type
components that have an initializing qualified expression, and
mutably tagged class-wide components default initialization.
(Gen_Loop): Handle mutably tagged class-wide types.
(Gen_Assign): ditto.
(Build_Record_Aggr_Code): Default initialization of mutably tagged
class-wide types is performed by their IP subprogram.
* exp_ch3.adb (Init_Component): Generate code to raise Program_Error
in the IP subprogram of arrays when the type of their components is
a mutably tagged abstract class-wide type.
(Build_Init_Procedure): ditto for the init procedure of record types.
(Build_Init_Statements): Ensure that the type of the expression
initializing a mutably class-wide tagged type component is frozen.
(Requires_Init_Proc): Mutably tagged class-wide types require the
init-proc since it takes care of their default initialization.
* sem_util.adb (Needs_Simple_Initialization): Mutably tagged class-wide
types don't require simple initialization.
* types.ads (PE_Abstract_Type_Component): New reason for Program_Error.
* types.h (PE_Abstract_Type_Component): ditto.
* exp_ch11.adb (Get_RT_Exception_Name): Handle new reason for
Program_Error.
* libgnat/a-except.adb (Rcheck_PE_Abstract_Type_Component): New
subprogram.

4 weeks agoada: Sort subprogram declaration in alphabetic order
Piotr Trojanek [Fri, 25 Apr 2025 08:03:35 +0000 (10:03 +0200)] 
ada: Sort subprogram declaration in alphabetic order

Code cleanup; semantics is unaffected.

gcc/ada/ChangeLog:

* sem_util.ads (Get_Enclosing_Object, Get_Enum_Lit_From_Pos,
Is_Universal_Numeric_Type): Reorder declarations.

4 weeks agoada: Ignore unchecked type conversions while getting enclosing object
Piotr Trojanek [Thu, 24 Apr 2025 14:56:20 +0000 (16:56 +0200)] 
ada: Ignore unchecked type conversions while getting enclosing object

This patch both makes GNAT emit warnings on unused assignments where previously
they were suppressed for obscure reasons and synchronizes routine
Get_Enclosing_Object with a similar routine in GNATprove (which differs in
handling of explicit dereferences).

gcc/ada/ChangeLog:

* sem_util.adb (Get_Enclosing_Object): Traverse unchecked type
conversions since they from the compiler and should be transparent for
semantic reasoning.

4 weeks agoada: Fix Itype-related predicate check omissions (part 2).
Steve Baird [Mon, 21 Apr 2025 18:57:30 +0000 (11:57 -0700)] 
ada: Fix Itype-related predicate check omissions (part 2).

Add to the previous fix for this issue to better handle cases where
GNATProve calls Einfo.Utils.Predicate_Function, passing in an Itype.

gcc/ada/ChangeLog:

* einfo-utils.adb (Predicate_Function): Look through an Itype if
that takes us to another subtype of the same type.

4 weeks agoada: Filling in gaps in handling of inherited Pre/Post'Class aspects
Gary Dismukes [Tue, 22 Apr 2025 21:50:53 +0000 (21:50 +0000)] 
ada: Filling in gaps in handling of inherited Pre/Post'Class aspects

The initial set of changes for doing proper mapping of calls to primitive
functions in Pre/Post'Class aspects inherited by derived types was not
handling some cases (such as when formals are referenced as part of
dereferences, certain aspects such as 'Old and 'Access, and conditional
and declare expressions), and mishandling other cases (such as nested
function calls).

This set of changes attempts to properly address those cases. It also
includes a change to suppress unneeded (and sometimes wrong) accessibility
checks on conversions of actual parameters of a derived type to the parent
type when passing them on calls to parent primitives (encountered while
developing these changes).

gcc/ada/ChangeLog:

* exp_util.adb (Must_Map_Call_To_Parent_Primitive): Change function
name (was Call_To_Parent_Dispatching_Op_Must_Be_Mapped). Move logic
for attributes and dereferences, plus testing for controlled formals,
into new function Expr_Has_Ctrl_Formal_Ref. Add handling for
access attributes, multiple levels of attributes/dereferences,
conditional_expressions, and declare_expressions. Properly account
for function calls with multiple operands and enclosing calls.
(Expr_Has_Ctrl_Formal_Ref): New function to determine whether
an expression is a reference to a controlling formal or has
a prefix that is such a reference.
(Is_Controlling_Formal_Ref): New function in Expr_Has_Ctrl_Formal_Ref
to determine if a node is a direct reference to a controlling formal.
* freeze.adb (Build_DTW_Body): Create an unchecked conversion instead
of a regular type conversion for converting actuals in calls to parent
inherited primitives that are wrapped for inherited pre/postconditions.
Avoids generating unnecessary checks (such as accessibility checks on
conversions for anonymous access formals).

4 weeks agoada: Tune name and commend document of a ghost utility routine
Piotr Trojanek [Thu, 24 Apr 2025 08:53:14 +0000 (10:53 +0200)] 
ada: Tune name and commend document of a ghost utility routine

Detection of ghost entities work similarly for names of objects (in assignment
statements) and for names of subprograms (in subprogram calls). Tune routine
name and its comment to match this similarity.

gcc/ada/ChangeLog:

* sem_util.ads (Get_Enclosing_Ghost_Entity): Rename spec.
* sem_util.adb (Get_Enclosing_Ghost_Object): Rename body; reorder
alphabetically; adapt recursive call.
* ghost.adb: Adapt calls to Get_Enclosing_Ghost_Object.

4 weeks agoada: Fix detection of ghost objects in unusual procedure calls
Piotr Trojanek [Thu, 24 Apr 2025 08:43:18 +0000 (10:43 +0200)] 
ada: Fix detection of ghost objects in unusual procedure calls

When name of a called procedure involves unusual constructs, e.g. type
conversions (like in "Typ (Obj).all"), we must look at the outermost construct
to decide whether the name denotes a ghost entity.

gcc/ada/ChangeLog:

* ghost.adb (Ghost_Entity): Remove; use Get_Enclosing_Ghost_Object
instead; adapt callers.

4 weeks agoada: Fix bogus error for pragma No_Component_Reordering on record type
Eric Botcazou [Tue, 22 Apr 2025 09:42:00 +0000 (11:42 +0200)] 
ada: Fix bogus error for pragma No_Component_Reordering on record type

This happens when the record type has an incomplete declaration before its
full declaration and is fixed by calling Find_Type appropriately.

gcc/ada/ChangeLog:

* sem_prag.adb (Analyze_Pragma) <Pragma_No_Component_Reordering>:
Call Find_Type on the first argument of the pragma.

4 weeks agoada: Remove redundant `gnatls -l` switch
Tonu Naks [Wed, 23 Apr 2025 14:44:16 +0000 (14:44 +0000)] 
ada: Remove redundant `gnatls -l` switch

gcc/ada/ChangeLog:

* gnatls.adb: remove -l switch

4 weeks agoada: 'Size'Class and interface types documentation
Steve Baird [Mon, 21 Apr 2025 19:59:09 +0000 (12:59 -0700)] 
ada: 'Size'Class and interface types documentation

Update GNAT RM documentation of the Size'Class aspect.

gcc/ada/ChangeLog:

* doc/gnat_rm/gnat_language_extensions.rst: Update documentation for
mutably tagged types and the Size'Class aspect.
* gnat_rm.texi: Regenerate.

4 weeks agoada: Fix detection of ghost objects in assignment statements
Piotr Trojanek [Fri, 18 Apr 2025 14:43:38 +0000 (16:43 +0200)] 
ada: Fix detection of ghost objects in assignment statements

Remove duplicated and inconsistent code for detecting ghost objects on the
left-hand side of assignment statements. Fix detection in the presence of
attribute references (e.g. "X'Access.all"), function calls (e.g. "F.all"),
qualified expressions (e.g. "T'(new Integer'(0)).all") and unchecked type
conversions (which come from expansion).

gcc/ada/ChangeLog:

* ghost.adb
(Whole_Object_Ref): Remove; use Get_Enclosing_Ghost_Object instead.
(Is_Ghost_Assignment): Handle more than object identifiers.
(Mark_And_Set_Ghost_Assignment): Likewise.
* sem_util.adb (Get_Enclosing_Ghost_Object): Detect more expressions
as ghost references; rename to better match the intended meaning.
* sem_util.ads (Get_Enclosing_Ghost_Object): Rename; adjust comment.

4 weeks agoada: Fix fallout of latest change to aggregate expansion
Eric Botcazou [Tue, 22 Apr 2025 11:51:14 +0000 (13:51 +0200)] 
ada: Fix fallout of latest change to aggregate expansion

It exposed a small loophole in the Backend_Processing_Possible predicate.

gcc/ada/ChangeLog:

* exp_aggr.adb (Backend_Processing_Possible.Component_Check): Return
False for delayed conditional expressions.

4 weeks agoada: Elide copy for calls as values of nonlimited by-reference components
Eric Botcazou [Fri, 18 Apr 2025 20:39:57 +0000 (22:39 +0200)] 
ada: Elide copy for calls as values of nonlimited by-reference components

...in aggregates.  This prevents a temporary from being created on the
primary stack to hold the result of the function calls before it is copied
to the component of the aggregate in the nonlimited by-reference case.

This requires a small tweak to Check_Function_Writable_Actuals to avoid
giving a spurious error in a specific case.

gcc/ada/ChangeLog:

* exp_aggr.ads (Parent_Is_Regular_Aggregate): New predicate.
* exp_aggr.adb (In_Place_Assign_OK.Safe_Component): Implement more
accurate criterion for function calls.
(Convert_To_Assignments): Use Parent_Is_Regular_Aggregate predicate.
(Expand_Array_Aggregate): Likewise.  Remove obsolete comment.
(Initialize_Component): Do not adjust when the expression is a naked
function call and Back_End_Return_Slot is True.
(Parent_Is_Regular_Aggregate): New predicate.
* exp_ch3.adb (Build_Record_Init_Proc.Build_Assignment): Add test of
Back_End_Return_Slot in conjunction with a function call.
* exp_ch4.adb (Expand_Allocator_Expression): Likewise.  Use the
Is_Container_Aggregate predicate to detect container aggregates.
(Expand_N_Case_Expression): Delay the expansion if the parent is a
regular aggregate and the type should not be copied.
(Expand_N_If_Expression): Likewise.
(New_Assign_Copy): New function.
* exp_ch6.adb (Expand_Ctrl_Function_Call): Bail out when the parent
is a regular aggregate.
* sem_util.adb (Check_Function_Writable_Actuals): Do not take into
account attribute references created by the compiler.

4 weeks agoada: use pointer decay for socket address type compatibility
Alexandre Oliva [Thu, 17 Apr 2025 04:19:24 +0000 (01:19 -0300)] 
ada: use pointer decay for socket address type compatibility

GCC 14 is stricter about type conversions.  Taking the address of an
array and decaying the array to a pointer to its first element yield
the same address, but the types are no longer considered compatible.
The socket data structures want decayed pointers rather than addresses
of arrays, so drop the '&'s.

gcc/ada/ChangeLog:

* socket.c [__vxworks]
(__gnat_gethostbyname): Drop excess '&'.
(__gnat_gethostbyaddr): Likewise.

4 weeks agoada: include header to declare isalpha in adaint
Alexandre Oliva [Thu, 17 Apr 2025 04:18:30 +0000 (01:18 -0300)] 
ada: include header to declare isalpha in adaint

A vxworks-specific part of adaint.c calls isalpha without including
ctype.h.  gcc-14 rejects calls of undeclared functions.  Include the
required header file when compiling for vxworks.

gcc/ada/ChangeLog:

* adaint.c [__vxworks]: Include ctype.h.

4 weeks agoada: Record type Put_Image procedures omitting discriminant values
Steve Baird [Sat, 12 Apr 2025 00:38:29 +0000 (17:38 -0700)] 
ada: Record type Put_Image procedures omitting discriminant values

If a type T has a partial view with a known_discriminant_part and no
user-specified Put_Image aspect specification, then the output generated
by  T'Put_Image would incorrectly omit the discriminant values.

gcc/ada/ChangeLog:

* exp_put_image.adb (Build_Record_Put_Image_Procedure): If
Discriminant_Specifications takes us from the full view of a type
to an (intentionally) unanalyzed subtree, then instead find
discriminant entities by calling Discriminant_Specifications on
the partial view of the type.

4 weeks agoada: Fix crash on nested access-to-subprogram types
Ronan Desplanques [Fri, 18 Apr 2025 14:45:10 +0000 (16:45 +0200)] 
ada: Fix crash on nested access-to-subprogram types

This patch fixes a crash on some subprograms with anonymous
access-to-subprogram parameters by removing delayed freezing of
subprograms in some cases where it wasn't necessary. The -gnatD output
for itypes is also improved.

gcc/ada/ChangeLog:

* sem_ch6.adb (Check_Delayed_Subprogram, Possible_Freeze): Restrict
cases where freezing is delayed.
* sem_ch6.ads (Check_Delayed_Subprogram): Improve documentation
comment.
* sprint.adb (Write_Itype): Improve output.

4 weeks agoada: Remove redundant condition in test of System.Val_Real.Integer_To_Real
Eric Botcazou [Fri, 18 Apr 2025 12:48:04 +0000 (14:48 +0200)] 
ada: Remove redundant condition in test of System.Val_Real.Integer_To_Real

The second condition of the conjunction is redundant with the first.

gcc/ada/ChangeLog:

* libgnat/s-valrea.adb (Integer_to_Real): Rename to...
(Integer_To_Real): ...this.  Remove the second condition of the
conjunction in the test for the zero value.
(Scan_Real): Adjust to above renaming.
(Value_Real): Likewise.
* libgnat/s-valuer.ads (Scan_Raw_Real): Add note about Val.

4 weeks agoada: Fix a couple of typos in the sanitizers for Ada
Jose Ruiz [Fri, 18 Apr 2025 13:02:59 +0000 (15:02 +0200)] 
ada: Fix a couple of typos in the sanitizers for Ada

gcc/ada/ChangeLog:

* doc/gnat_ugn/gnat_and_program_execution.rst: Fix a
couple of minor formatting issues.
* gnat_ugn.texi: Regenerate.

4 weeks agoada: Add entity chain debug printing subprograms
Ronan Desplanques [Thu, 17 Apr 2025 09:50:42 +0000 (11:50 +0200)] 
ada: Add entity chain debug printing subprograms

This patchs adds two pn-like subprograms that print entity chains.

gcc/ada/ChangeLog:

* treepr.ads (Print_Entity_Chain, pec, rpec): New subprograms.
* treepr.adb (Print_Entity_Chain, pec, rpec): Likewise.

4 weeks agoada: Fix typo in comment
Ronan Desplanques [Thu, 17 Apr 2025 09:48:59 +0000 (11:48 +0200)] 
ada: Fix typo in comment

gcc/ada/ChangeLog:

* atree.ads (Parent_Or_List_Containing): Fix typo.

4 weeks agoada: Tweak handling of Parent field in Print_Node
Ronan Desplanques [Thu, 17 Apr 2025 08:02:01 +0000 (10:02 +0200)] 
ada: Tweak handling of Parent field in Print_Node

Before this patch, Print_Node failed to honor its Prefix_Char formal
parameter when printing the Parent field. This had no consequences
because Prefix_Char was only used to print members of Nlists, and those
don't have a parent in the tree. But this patch fixes it anyway in
preparation for new debug printing features.

gcc/ada/ChangeLog:

* treepr.adb (Print_Node): Tweak Parent field printing.

4 weeks agoada: Document sanitizers for Ada
Jose Ruiz [Wed, 16 Apr 2025 14:16:14 +0000 (16:16 +0200)] 
ada: Document sanitizers for Ada

gcc/ada/ChangeLog:

* doc/gnat_ugn/gnat_and_program_execution.rst: Add the
documentation about using sanitizers with Ada code.
* gnat_ugn.texi: Regenerate.

4 weeks agoada: Document sanitizers for Ada
Jose Ruiz [Wed, 16 Apr 2025 14:16:14 +0000 (16:16 +0200)] 
ada: Document sanitizers for Ada

gcc/ada/ChangeLog:

* doc/gnat_ugn/gnat_and_program_execution.rst: Add the
documentation about using sanitizers with Ada code.
* gnat_ugn.texi: Regenerate.

4 weeks agoada: Remove dead branch from Get_Enclosing_Object
Piotr Trojanek [Tue, 16 Jan 2024 21:43:09 +0000 (22:43 +0100)] 
ada: Remove dead branch from Get_Enclosing_Object

The dead branch in routine Get_Enclosing_Object was most likely some
experiment from the early days of GNATprove. This routine is meant
to be called with the LHS of an assignment statement where an implicit
dereference is always rewritten into explicit one, regardless if code
is generated.

gcc/ada/ChangeLog:

* sem_util.adb (Get_Enclosing_Object): Remove dead code.