* parser.c (cp_parser_range_based_for_with_init_p): New.
(cp_parser_init_statement): Use it. Parse the optional init-statement
for a range-based for loop.
(cp_parser_skip_to_closing_parenthesis_1): Handle balancing ?:.
* g++.dg/cpp2a/range-for1.C: New test.
* g++.dg/cpp2a/range-for2.C: New test.
* g++.dg/cpp2a/range-for3.C: New test.
* g++.dg/cpp2a/range-for4.C: New test.
* g++.dg/cpp2a/range-for5.C: New test.
* g++.dg/cpp2a/range-for6.C: New test.
* g++.dg/cpp2a/range-for7.C: New test.
From-SVN: r260619
The following patch adds an option to control software prefetching of memory
references with non-constant/unknown strides.
Currently we prefetch these references if the pass thinks there is benefit to
doing so. But, since this is all based on heuristics, it's not always the case
that we end up with better performance.
For Falkor there is also the problem of conflicts with the hardware prefetcher,
so we need to be more conservative in terms of what we issue software prefetch
hints for.
This also aligns GCC with what LLVM does for Falkor.
Similarly to the previous patch, the defaults guarantee no change in behavior
for other targets and architectures.
gcc/ChangeLog:
2018-05-23 Luis Machado <luis.machado@linaro.org>
* config/aarch64/aarch64-protos.h (cpu_prefetch_tune)
<prefetch_dynamic_strides>: New const bool field.
* config/aarch64/aarch64.c (generic_prefetch_tune): Update to include
prefetch_dynamic_strides.
(exynosm1_prefetch_tune): Likewise.
(thunderxt88_prefetch_tune): Likewise.
(thunderx_prefetch_tune): Likewise.
(thunderx2t99_prefetch_tune): Likewise.
(qdf24xx_prefetch_tune): Likewise. Set prefetch_dynamic_strides to
false.
(aarch64_override_options_internal): Update to set
PARAM_PREFETCH_DYNAMIC_STRIDES.
* doc/invoke.texi (prefetch-dynamic-strides): Document new option.
* params.def (PARAM_PREFETCH_DYNAMIC_STRIDES): New.
* params.h (PARAM_PREFETCH_DYNAMIC_STRIDES): Define.
* tree-ssa-loop-prefetch.c (should_issue_prefetch_p): Account for
prefetch-dynamic-strides setting.
From-SVN: r260618
This patch adds a new option to control the minimum stride, for a memory
reference, after which the loop prefetch pass may issue software prefetch
hints for. There are two motivations:
* Make the pass less aggressive, only issuing prefetch hints for bigger strides
that are more likely to benefit from prefetching. I've noticed a case in cpu2017
where we were issuing thousands of hints, for example.
* For processors that have a hardware prefetcher, like Falkor, it allows the
loop prefetch pass to defer prefetching of smaller (less than the threshold)
strides to the hardware prefetcher instead. This prevents conflicts between
the software prefetcher and the hardware prefetcher.
I've noticed considerable reduction in the number of prefetch hints and
slightly positive performance numbers. This aligns GCC and LLVM in terms of
prefetch behavior for Falkor.
The default settings should guarantee no changes for existing targets. Those
are free to tweak the settings as necessary.
gcc/ChangeLog:
2018-05-23 Luis Machado <luis.machado@linaro.org>
* config/aarch64/aarch64-protos.h (cpu_prefetch_tune)
<minimum_stride>: New const int field.
* config/aarch64/aarch64.c (generic_prefetch_tune): Update to include
minimum_stride field defaulting to -1.
(exynosm1_prefetch_tune): Likewise.
(thunderxt88_prefetch_tune): Likewise.
(thunderx_prefetch_tune): Likewise.
(thunderx2t99_prefetch_tune): Likewise.
(qdf24xx_prefetch_tune) <minimum_stride>: Set to 2048.
<default_opt_level>: Set to 3.
(aarch64_override_options_internal): Update to set
PARAM_PREFETCH_MINIMUM_STRIDE.
* doc/invoke.texi (prefetch-minimum-stride): Document new option.
* params.def (PARAM_PREFETCH_MINIMUM_STRIDE): New.
* params.h (PARAM_PREFETCH_MINIMUM_STRIDE): Define.
* tree-ssa-loop-prefetch.c (should_issue_prefetch_p): Return false if
stride is constant and is below the minimum stride threshold.
From-SVN: r260617
The C++17 std::filesystem::path grammar allows an empty filename as the
last component (to signify a trailing slash). The existing code does not
handle this consistently, sometimes an empty filename has type _Multi
and sometimes it has type _Filename. This can result in a non-empty
iterator range for an empty filename component.
This change ensures that empty paths always have type _Filename and will
yield an empty iterator range.
* include/bits/fs_path.h (path::_M_type): Change default member
initializer to _Filename.
(path::begin): Create past-the-end iterator for empty path.
* src/filesystem/std-path.cc (path::remove_filename()): Remove
debugging check.
(path::has_relative_path()): Return false for empty filenames.
(path::_M_split_cmpts): Set _M_type to _Filename for empty paths.
Fix offset of empty final component.
* testsuite/27_io/filesystem/path/itr/components.cc: New.
* testsuite/27_io/filesystem/path/itr/traversal.cc: Add new inputs.
From-SVN: r260616
PR rtl-optimization/79985
* df-scan.c (df_insn_refs_collect): Remove special case for
global registers and asm statements.
testsuite/
* gcc.dg/pr79985.c: New testcase.
From-SVN: r260613
* extend.texi (Global Register Variables): Rewrite the bullet list.
Note that the register is available for allocation. Note that access
via inline asm must use constraints. Add note about async-signal
handlers. Remove paragraph about automagic register selection.
From-SVN: r260610
Simplify frame pointer logic. Add aarch64_needs_frame_chain to
decide when to emit the frame chain using clearer logic.
Introduce aarch64_use_frame_pointer which contains the value of
-fno-omit-frame-pointer (flag_omit_frame_pointer is set to a magic
value so that the mid-end won't force the frame pointer in all
cases, and leaf frame pointer emission can't be supported).
gcc/
* config/aarch64/aarch64.c (aarch64_use_frame_pointer):
Add new boolean.
(aarch64_needs_frame_chain): New function.
(aarch64_parse_override_string): Set aarch64_use_frame_pointer.
From-SVN: r260606
*** gcc/ChangeLog ***
2018-05-23 Sudakshina Das <sudi.das@arm.com>
PR target/84882
* common/config/aarch64/aarch64-common.c (aarch64_handle_option):
Check val before adding MASK_STRICT_ALIGN to opts->x_target_flags.
* config/aarch64/aarch64.opt (mstrict-align): Remove RejectNegative.
* config/aarch64/aarch64.c (aarch64_attributes): Mark allow_neg
as true for strict-align.
(aarch64_can_inline_p): Perform checks even when callee has no
attributes to check for strict alignment.
* doc/extend.texi (AArch64 Function Attributes): Document
no-strict-align.
* doc/invoke.texi: (AArch64 Options): Likewise.
*** gcc/testsuite/ChangeLog ***
2018-05-23 Sudakshina Das <sudi.das@arm.com>
PR target/84882
* gcc.target/aarch64/pr84882.c: New test.
* gcc.target/aarch64/target_attr_18.c: Likewise.
From-SVN: r260604
In this PR, SLP failed to include a comparison node in the SLP
tree and so marked the node as external. It then went on to call
vect_is_simple_use on the comparison with its STMT_VINFO_DEF_TYPE
still claiming that it was an internal definition.
We already avoid that for vect_analyze_stmt by temporarily copying
the node's definition type to each STMT_VINFO_DEF_TYPE. This patch
extends that to the vector type calculation. The easiest thing
seemed to be to split the analysis of the root node out into
a subroutine, so that it's possible to return false early without
awkward control flow.
2018-05-23 Richard Sandiford <richard.sandiford@linaro.org>
gcc/
PR tree-optimization/85853
* tree-vect-slp.c (vect_slp_analyze_node_operations): Split out
the handling of the root of the node to...
(vect_slp_analyze_node_operations_1): ...this new function,
and run the whole thing with the child nodes' def types
set according to their SLP node's def type.
gcc/testsuite/
PR tree-optimization/85853
* gfortran.dg/vect/pr85853.f90: New test.
From-SVN: r260601
An obvious mistake due to missing parentheses was not properly computing the
size of the handle and pid list passed to WaitForMultipleObjects(). This
resulted in a memory corruption.
2018-05-23 Pascal Obry <obry@adacore.com>
gcc/ada/
* adaint.c (win32_wait): Add missing parentheses.
From-SVN: r260598
This patch moves the check which verifies that a large modular array is created
from expansion to freezing in order to take interfacing pragmas in account. The
check is no longer performed on imported objects because no object is created
in that case.
2018-05-23 Hristian Kirtchev <kirtchev@adacore.com>
gcc/ada/
* exp_ch3.adb (Check_Large_Modular_Array): Moved to Freeze.
(Expand_N_Object_Declaration): Do not check for a large modular array
here.
* freeze.adb (Check_Large_Modular_Array): Moved from Exp_Ch3.
(Freeze_Object_Declaration): Code cleanup. Check for a large modular
array.
* sem_ch3.adb: Minor reformatting.
gcc/testsuite/
* gnat.dg/import2.adb: New testcase.
From-SVN: r260597
This patch fixes a spurious error when instantiating an indefinite container
with a private type with unknown discriminants, when its full view is an
unconstrained array type. It also cleans up the inheritance of dynamic
predicates inherited by anonymous subtypes of array types.
2018-05-23 Ed Schonberg <schonberg@adacore.com>
gcc/ada/
* einfo.ads: New attribute on types: Predicated_Parent, to simplify the
retrieval of the applicable predicate function to an itype created for
a constrained array component.
* einfo.adb: Subprograms for Predicated_Parent.
(Predicate_Function): Use new attribute.
* exp_util.adb (Make_Predicate_Call): If the predicate function is not
available for a subtype, retrieve it from the base type, which may have
been frozen after the subtype declaration and not captured by the
subtype declaration.
* sem_aggr.adb (Resolve_Array_Aggregate): An Others association is
legal within a generated initiqlization procedure, as may happen with a
predicate check on a component, when the predicate function applies to
the base type of the component.
* sem_ch3.adb (Analyze_Subtype_Declaration): Clean up inheritance of
predicates for subtype declarations and for subtype indications in
other contexts.
(Process_Subtype): Likewise. Handle properly the case of a private type
with unknown discriminants whose full view is an unconstrained array.
Use Predicated_Parent to indicate source of predicate function on an
itype whose parent is itself an itype.
(Complete_Private_Subtype): If the private view has unknown
discriminants and the full view is an unconstrained array, set base
type of completion to the full view of parent.
(Inherit_Predicate_Flags): Prevent double assignment of predicate
function and flags.
(Build_Subtype): For a constrained array component, propagate predicate
information from original component type declaration.
gcc/testsuite/
* gnat.dg/discr51.adb: New testcase.
From-SVN: r260596
2018-05-23 Arnaud Charlet <charlet@adacore.com>
gcc/ada/
* checks.adb (Minimize_Eliminate_Overflows): Default initialize Lo and
Hi.
* sem_elab.adb: Make "out" parameters instead of "in out" when
relevant.
From-SVN: r260594
When the gnatbind -r switch is used, do not list
No_Implementation_Restrictions, because after using the new restriction list,
No_Implementation_Restrictions will cause an error.
2018-05-23 Bob Duff <duff@adacore.com>
gcc/ada/
* gnatbind.adb (List_Applicable_Restrictions): Add
No_Implementation_Restrictions to the list of restrictions not to list.
Remove double negative "not No_Restriction_List". Comment the
commentary that is output, so it won't cause errors if used directly in
a gnat.adc.
From-SVN: r260593
This patch refines the legality check on a class-wide precondition on a type
extension when ancestor does not have a class-wide precondition. Previously the
compiler accepted such a precondition when the ancestor had a class-wide
postcondition.
Compiling pck.ads must yield:
pck.ads:7:04: illegal class-wide precondition on overriding operation
----
package Pck is
type Parent is tagged null record;
procedure Init (P : Parent) with Post'Class => True;
type Child is new Parent with null record;
overriding procedure Init (C : Child) with
Pre'Class => True;
end Pck;
2018-05-23 Ed Schonberg <schonberg@adacore.com>
gcc/ada/
* sem_prag.adb (Inherit_Class_Wide_Pre): Refine legality check on
class-wide precondition on a type extension when ancestor does not have
a class-wide precondition. Previously the compiler accepted such a
precondition when the ancestor had a class-wide postcondition.
From-SVN: r260592
The compiler blows up generating code associated with occurrences of attribute
Valid_Scalars whose evaluation is always true. After this patch the following
test compiles fine.
2018-05-23 Javier Miranda <miranda@adacore.com>
gcc/ada/
* sem_attr.adb (Valid_Scalars): Do not invoke Error_Attr_P to report
the warning on occurrences of this attribute whose evaluation is always
true (since that subprogram aborts processing the attribute). In
addition, replace the node by its boolean result 'True' (required
because the backend has no knowledge of this attribute).
gcc/testsuite/
* gnat.dg/valid_scalars1.adb: New testcase.
From-SVN: r260591
This patch fixes a bug in which if Ada.Containers.Vectors is instantiated with
an Index_Type such that Index_Type'Base'Last is less than Count_Type'Last, and
the -gnatwE switch is used, the compiler gives spurious error messages.
The following test should compile quietly with -gnatwE:
gnatmake short_vectors.ads -gnatwa -gnatwE -gnatf
with Ada.Containers.Vectors;
package Short_Vectors is
type Index_Type is range 1 .. 256;
package Map_Pkg is new Ada.Containers.Vectors
(Index_Type => Index_Type,
Element_Type => Integer);
end Short_Vectors;
2018-05-23 Bob Duff <duff@adacore.com>
gcc/ada/
* libgnat/a-convec.adb: (Insert, Insert_Space): Suppress warnings. The
code in question is not reachable in the case where Count_Type'Last is
out of range.
From-SVN: r260590
A local use of pragma Warnings Off to suppress specific messages, when
not followed by a matching pragma Warnings On, extends until the end of
the file.
2018-05-23 Yannick Moy <moy@adacore.com>
gcc/ada/
* doc/gnat_rm/implementation_defined_pragmas.rst: Clarify meaning of
local pragma Warnings Off without On.
* gnat_rm.texi: Regenerate.
From-SVN: r260589
Useful to check if an occurrence caught by a "when others" choice originates
from a foreign language, e.g. C++.
2018-05-23 Olivier Hainque <hainque@adacore.com>
gcc/ada/
* libgnat/g-excact.ads (Is_Foreign_Exception): New predicate.
* libgnat/g-excact.adb: Implement.
From-SVN: r260588
This patch adds a check on an iterator over a GNAT-specific formal container,
when the iterator specification includes a subtype indication that must be
compatible with the element type of the container.
2018-05-23 Ed Schonberg <schonberg@adacore.com>
gcc/ada/
* sem_ch5.adb (Analyze_Iterator_Specification): If a subtype indication
is present, verify its legality when the domain of iteration is a
GNAT-specific formal container, as is already done for arrays and
predefined containers.
gcc/testsuite/
* gnat.dg/iter1.adb, gnat.dg/iter1.ads: New testcase.
From-SVN: r260587
This utility is used in GNATprove to find when a node is inside a named
number declaration, and this case was not properly handled. Now fixed.
There is no impact on compilation.
2018-05-23 Yannick Moy <moy@adacore.com>
gcc/ada/
* sem_util.adb (Enclosing_Declaration): Fix the case of a named number
declaration, which was not taken into account.
From-SVN: r260586
This patch modifies the static elaboration model to stop the inspection of
a task body when it contains a synchronous suspension call and restriction
No_Entry_Calls_In_Elaboration_Code or switch -gnatd_s is in effect.
------------
-- Source --
------------
-- suspension.ads
package Suspension is
procedure ABE;
task type Barrier_Task_1;
task type Barrier_Task_2;
task type Object_Task_1;
task type Object_Task_2;
end Suspension;
-- suspension.adb
with Ada.Synchronous_Barriers; use Ada.Synchronous_Barriers;
with Ada.Synchronous_Task_Control; use Ada.Synchronous_Task_Control;
package body Suspension is
Bar : Synchronous_Barrier (Barrier_Limit'Last);
Obj : Suspension_Object;
task body Barrier_Task_1 is
OK : Boolean;
begin
Wait_For_Release (Bar, OK);
ABE;
end Barrier_Task_1;
task body Barrier_Task_2 is
procedure Block is
OK : Boolean;
begin
Wait_For_Release (Bar, OK);
end Block;
begin
Block;
ABE;
end Barrier_Task_2;
task body Object_Task_1 is
begin
Suspend_Until_True (Obj);
ABE;
end Object_Task_1;
task body Object_Task_2 is
procedure Block is
begin
Suspend_Until_True (Obj);
end Block;
begin
Block;
ABE;
end Object_Task_2;
function Elaborator return Boolean is
BT_1 : Barrier_Task_1;
BT_2 : Barrier_Task_2;
OT_1 : Object_Task_1;
OT_2 : Object_Task_2;
begin
return True;
end Elaborator;
Elab : constant Boolean := Elaborator;
procedure ABE is begin null; end ABE;
end Suspension;
-- main.adb
with Suspension;
procedure Main is begin null; end Main;
----------------------------
-- Compilation and output --
----------------------------
$ gnatmake -q -gnatd_s main.adb
suspension.adb:23:07: warning: cannot call "ABE" before body seen
suspension.adb:23:07: warning: Program_Error may be raised at run time
suspension.adb:23:07: warning: body of unit "Suspension" elaborated
suspension.adb:23:07: warning: function "Elaborator" called at line 51
suspension.adb:23:07: warning: local tasks of "Elaborator" activated
suspension.adb:23:07: warning: procedure "ABE" called at line 23
suspension.adb:39:07: warning: cannot call "ABE" before body seen
suspension.adb:39:07: warning: Program_Error may be raised at run time
suspension.adb:39:07: warning: body of unit "Suspension" elaborated
suspension.adb:39:07: warning: function "Elaborator" called at line 51
suspension.adb:39:07: warning: local tasks of "Elaborator" activated
suspension.adb:39:07: warning: procedure "ABE" called at line 39
2018-05-23 Hristian Kirtchev <kirtchev@adacore.com>
gcc/ada/
* debug.adb: Switch -gnatd_s is now used to stop elaboration checks on
synchronized suspension.
* rtsfind.ads: Add entries for units Ada.Synchronous_Barriers and
Ada.Synchronous_Task_Control and routines Suspend_Until_True and
Wait_For_Release.
* sem_elab.adb: Document switch -gnatd_s.
(In_Task_Body): New routine.
(Is_Potential_Scenario): Code cleanup. Stop the traversal of a task
body when the current construct denotes a synchronous suspension call,
and restriction No_Entry_Calls_In_Elaboration_Code or switch -gnatd_s
is in effect.
(Is_Synchronous_Suspension_Call): New routine.
* switch-c.adb (Scan_Front_End_Switches): Switch -gnatJ now sets switch
-gnatd_s.
From-SVN: r260585
2018-05-23 Javier Miranda <miranda@adacore.com>
gcc/ada/
* exp_disp.adb (Make_DT): Restrict the initialization of
External_Tag and Expanded_Name to an empty string to the case where
both pragmas apply (i.e. No_Tagged_Streams and Discard_Names), since
restricted runtimes are compiled with pragma Discard_Names.
* doc/gnat_rm/implementation_defined_pragmas.rst,
doc/gnat_rm/implementation_defined_characteristics.rst: Add
documentation.
* gnat_rm.texi: Regenerate.
From-SVN: r260584
This commit fixes bugs in the code that implements the rules for safe pointers
in SPARK. This only affects SPARK tools, not compilation.
* Global variables should be handled differently compared
to parameters. The whole tree of an in global variable has the
permission Read-Only. In contrast, an in parameter has the
permission Read-Only for the first level and Read-Write permission
for suffixes.
* The suffix X of Integer'image(X) was not analyzed correctly.
* The instruction X'img was not dealt with.
* Shallow aliased types which are not initialized are now allowed
and analyzed.
Dealing with function inlining is not handled correctly yet.
2018-05-23 Maroua Maalej <maalej@adacore.com>
gcc/ada/
* sem_spark.adb: Fix of some permission rules of pointers in SPARK.
From-SVN: r260583
This patch inhibits the generation of freeze nodes when pre-analyzing the
domain of iteration of an Ada2012 loop that appears as a quantified
expression in a predicate for an array type. This prevents a back-end
abort on an invisible freeze node that would otherwise appear in an
unexpanded code sequence.
The following must compile quietly:
----
with Id_Manager;
package My_Id_Manager is new Id_Manager (Max_Id_Type => 100_000,
Max_Key_Count => 100);
----
generic
Max_Id_Type : Positive;
Max_Key_Count : Positive;
package Id_Manager is
type Unique_Id_Type is new Integer range 0 .. Max_Id_Type;
Undefined_Id : constant Unique_Id_Type := 0;
type Key_Count is new Integer range 0 .. Max_Key_Count;
subtype Key_Index is Key_Count range 1 .. Key_Count'Last;
type Key_Array is array (Key_Index range <>) of Unique_Id_Type
with Predicate => Key_Array'First = 1;
type Id_Manager_State (Capacity : Key_Count) is private;
procedure Display_Objects (TheObject : Id_Manager_State);
private
type Id_Manager_State (Capacity : Key_Count) is record
Id_Key : Key_Array (1 .. Capacity) := (others => Undefined_Id);
Key_Size : Key_Count := 0;
end record;
end Id_Manager;
----
package body Id_Manager is
procedure Display_Objects (TheObject : Id_Manager_State) is
begin
for Item of TheObject.Id_Key loop
null;
end loop;
end Display_Objects;
end Id_Manager;
2018-05-23 Ed Schonberg <schonberg@adacore.com>
gcc/ada/
* sem_ch5.adb (Preanalyze_Range): The pre-analysis of the domain of
iteration of an Ada2012 loop is performed to determine the type of the
domain, but full analysis is performed once the loop is rewritten as a
while-loop during expansion. The pre-analysis suppresses expansion; it
must also suppress the generation of freeze nodes, which may otherwise
appear in the wrong scope before rewritting.
From-SVN: r260582
This patch updates the documentation section on suppressing elaboration
warnings. No change in behavior, no need for a test.
2018-05-23 Hristian Kirtchev <kirtchev@adacore.com>
gcc/ada/
* sem_elab.adb: Update the section on suppressing elaboration warnings.
From-SVN: r260581
This patch modifies the effects of pragma Warnings (Off, ...) to suppress
elaboration warnings related to an entity.
2018-05-23 Hristian Kirtchev <kirtchev@adacore.com>
gcc/ada/
* einfo.adb (Is_Elaboration_Checks_OK_Id): Use predicate
Is_Elaboration_Target.
(Is_Elaboration_Target): New routine.
(Is_Elaboration_Warnings_OK_Id): Use predicate Is_Elaboration_Target.
(Set_Is_Elaboration_Checks_OK_Id): Use predicate Is_Elaboration_Target.
(Set_Is_Elaboration_Warnings_OK_Id): Use predicate
Is_Elaboration_Target.
* einfo.ads: Add new synthesized attribute Is_Elaboration_Target along
with occurrences in nodes.
(Is_Elaboration_Target): New routine.
* sem_prag.adb (Analyze_Pragma): Suppress elaboration warnings when an
elaboration target is subject to pragma Warnings (Off, ...).
gcc/testsuite/
* gnat.dg/elab5.adb, gnat.dg/elab5_pkg.adb, gnat.dg/elab5_pkg.ads: New
testcase.
From-SVN: r260580
This patch changes the behavior of elaboration-related warnings as follows:
* If a scenario or a target has [elaboration] warnings suppressed, then
any further elaboration-related warnings along the paths rooted at the
scenario are also suppressed.
* Elaboration-related warnings related to task activation can now be
suppressed when either the task object, task type, or the activation
call have [elaboration] warnings suppressed.
* Elaboration-related warnings related to calls can now be suppressed when
either the target or the call have [elaboration] warnings suppressed.
* Elaboration-related warnings related to instantiations can now be
suppressed when the instantiation has [elaboration] warnings suppressed.
The patch also cleans up the way the state of the Processing phase is updated
with each new node along a path. It is now preferable to update the state in
routines
Process_Conditional_ABE_Activation_Impl
Process_Conditional_ABE_Call
Process_Conditional_ABE_Instantiation
rather than within their language-specific versions.
2018-05-23 Hristian Kirtchev <kirtchev@adacore.com>
gcc/ada/
* einfo.adb: Flag304 is now Is_Elaboration_Warnings_OK_Id.
(Is_Elaboration_Warnings_OK_Id): New routine.
(Set_Is_Elaboration_Warnings_OK_Id): New routine.
(Write_Entity_Flags): Output Flag304.
* einfo.ads: Add new attribute Is_Elaboration_Warnings_OK_Id along with
occurrences in entities.
(Is_Elaboration_Warnings_OK_Id): New routine along with pragma Inline.
(Set_Is_Elaboration_Warnings_OK_Id): New routine along with pragma
Inline.
* sem_attr.adb (Analyze_Access_Attribute): Capture the state of
elaboration warnings.
* sem_ch3.adb (Analyze_Object_Declaration): Capture the state of
elaboration warnings.
* sem_ch6.adb (Analyze_Abstract_Subprogram_Declaration): Capture the
state of elaboration warnings.
(Analyze_Subprogram_Body_Helper): Capture the state of elaboration
warnings.
(Analyze_Subprogram_Declaration): Capture the state of elaboration
warnings.
* sem_ch9.adb (Analyze_Entry_Declaration): Capture the state of
elaboration warnings.
(Analyze_Single_Task_Declaration): Capture the state of elaboration
warnings.
(Analyze_Task_Type_Declaration): Capture the state of elaboration
warnings.
* sem_ch12.adb (Analyze_Generic_Package_Declaration): Capture the state
of elaboration warnings.
(Analyze_Generic_Subprogram_Declaration): Capture the state of
elaboration warnings.
* sem_elab.adb: Add a section on suppressing elaboration warnings.
Type Processing_Attributes includes component Suppress_Warnings
intended to suppress any elaboration warnings along a path in the
graph. Update Initial_State to include a value for this component.
Types Target_Attributes and Task_Attriutes include component
Elab_Warnings_OK to indicate whether the target or task has elaboration
warnings enabled. component Elab_Warnings_OK.
(Build_Access_Marker): Propagate attribute
Is_Elaboration_Warnings_OK_Node from the attribute to the generated
call marker.
(Extract_Instantiation_Attributes): Set the value for Elab_Warnings_OK.
(Extract_Target_Attributes): Set the value for Elab_Warnings_OK.
(Extract_Task_Attributes): Set the value for Elab_Warnings_OK.
(Process_Conditional_ABE_Access): Suppress futher elaboration warnings
when already in this mode or when the attribute or target have warnings
suppressed.
(Process_Conditional_ABE_Activation_Impl): Do not emit any diagnostics
if warnings are suppressed.
(Process_Conditional_ABE_Call): Suppress further elaboration warnings
when already in this mode, or the target or call have warnings
suppressed.
(Process_Conditional_ABE_Call_Ada): Do not emit any diagnostics if
warnings are suppressed.
(Process_Conditional_ABE_Call_SPARK): Do not emit any diagnostics if
warnings are suppressed.
(Process_Conditional_ABE_Instantiation): Suppress further elaboration
warnings when already in this mode or when the instantiation has
warnings suppressed.
(Process_Conditional_ABE_Instantiation_Ada): Do not emit any
diagnostics if warnings are suppressed.
(Process_Conditional_ABE_Variable_Assignment_Ada): Use the more
specific Is_Elaboration_Warnings_OK_Id rather than Warnings_Off.
(Process_Conditional_ABE_Variable_Assignment_SPARK): Use the more
specific Is_Elaboration_Warnings_OK_Id rather than Warnings_Off.
(Process_Task_Object): Suppress further elaboration warnings when
already in this mode, or when the object, activation call, or task type
have warnings suppressed. Update the processing state to indicate that
the path goes through a task body.
* sinfo.adb (Is_Elaboration_Warnings_OK_Node): Accept attribute
references.
(Set_Is_Elaboration_Warnings_OK_Node): Accept attribute references.
* sinfo.ads: Attribute Is_Elaboration_Warnings_OK_Node now applies to
attribute references.
gcc/testsuite/
* gnat.dg/elab4.adb, gnat.dg/elab4_pkg.adb, gnat.dg/elab4_pkg.ads: New
testcase.
From-SVN: r260578
GNAT properly rejects an attempt to assign an access_to_subprogram formal
to a local variable, according to accessibiiity rules. This patch forces the
same behavior on the use of such a formal in an object declaration.
Compiling store_anon.adb must yield:
store_anon.adb:7:35: illegal attempt to store anonymous access to subprogram
store_anon.adb:7:35: value has deeper accessibility than any master
(RM 3.10.2 (13))
store_anon.adb:7:35: use named access type for "P" instead of access parameter
----
package Store_Anon is
procedure Store (P : not null access procedure);
procedure Invoke;
end Store_Anon;
----
package body Store_Anon is
type P_Ptr is access procedure;
Stored : P_Ptr;
procedure Store (P : not null access procedure) is
Illegal : constant P_Ptr := P;
begin -- Store
Stored := Illegal;
end Store;
procedure Invoke is
-- Empty
begin -- Invoke
Stored.all;
end Invoke;
end Store_Anon;
2018-05-23 Ed Schonberg <schonberg@adacore.com>
gcc/ada/
* sem_ch3.adb (Analyze_Object_Declaration): If expression is an
anonymous_access_to_ subprogram formal, apply a conversion to force an
accsssibility check that will fail statically, enforcing 3.10.2 (13).
From-SVN: r260576
This patch fixes a bug in which if a limited volatile variable with
an Address aspect is initialized with a build-in-place aggregate
containing build-in-place function calls, the compiler can crash.
2018-05-23 Bob Duff <duff@adacore.com>
gcc/ada/
* freeze.adb: (Check_Address_Clause): Deal with build-in-place
aggregates in addition to build-in-place calls.
gcc/testsuite/
* gnat.dg/addr10.adb: New testcase.
From-SVN: r260574
This patch suppresses the optimization of scalar arrays when pragma
Initialize_Scalars is in effect if the component type is subject to
predicates. Since the scalar array is initialized with invalid values,
these values may violate the predicate or a validity check within the
predicate.
------------
-- Source --
------------
-- gnat.adc
pragma Initialize_Scalars;
-- types.ads
with System; use System;
package Types is
type Byte is mod System.Storage_Unit;
subtype Inter_Byte is Byte;
function Always_OK (B : Inter_Byte) return Boolean is (True);
function Is_OK (B : Inter_Byte) return Boolean is (Always_OK (B));
subtype Final_Byte is Byte with Predicate => Is_OK (Final_Byte);
type Bytes is array (1 .. 5) of Final_Byte;
Obj : Bytes;
end Types;
-- main.adb
with Types; use Types;
procedure Main is begin null; end Main;
-----------------
-- Compilation --
-----------------
$ gnatmake -q -gnata -gnatVa main.adb
$ ./main
2018-05-23 Hristian Kirtchev <kirtchev@adacore.com>
gcc/ada/
* exp_ch3.adb (Default_Initialize_Object): Do not optimize scalar array
initialization when the component type has predicates.
* exp_ch4.adb (Expand_N_Allocator): Do not optimize scalar array
allocation when the component type has predicates.
From-SVN: r260572
