gcc.git
4 years ago[Ada] Revert mistaken negation related to references to labels
Piotr Trojanek [Sat, 30 May 2020 18:54:49 +0000 (20:54 +0200)]
[Ada] Revert mistaken negation related to references to labels

gcc/ada/

* sem_ch8.adb (Find_Direct_Name): Fix code to match the comment.

4 years ago[Ada] Add warning for overlays changing scalar storage order
Eric Botcazou [Sat, 30 May 2020 09:14:12 +0000 (11:14 +0200)]
[Ada] Add warning for overlays changing scalar storage order

gcc/ada/

* sem_ch13.adb (Analyze_Attribute_Definition_Clause) <Address>:
Issue an unconditional warning for an overlay that changes the
scalar storage order.

4 years ago[Ada] Fix detection of actual parameters for procedure calls
Piotr Trojanek [Sat, 30 May 2020 18:02:52 +0000 (20:02 +0200)]
[Ada] Fix detection of actual parameters for procedure calls

gcc/ada/

* sem_ch8.adb (Is_Actual_Parameter): Fix processing when parent
is a procedure call statement; extend comment.

4 years ago[Ada] Ada2020: AI12-0368 Declare expressions can be static
Bob Duff [Thu, 28 May 2020 20:16:06 +0000 (16:16 -0400)]
[Ada] Ada2020: AI12-0368 Declare expressions can be static

gcc/ada/

* sem_res.adb (Resolve_Expression_With_Actions): Check the rules
of AI12-0368, and mark the declare expression as static or known
at compile time as appropriate.
* sem_ch4.adb: Minor reformatting.
* libgnat/a-stoufo.ads, libgnat/a-stoufo.adb: Allow up to 9
replacement parameters. I'm planning to use this in the test
case for this ticket.

4 years ago[Ada] Spurious error on parameterless acccess_to_subprogram
Ed Schonberg [Thu, 28 May 2020 21:09:32 +0000 (17:09 -0400)]
[Ada] Spurious error on parameterless acccess_to_subprogram

gcc/ada/

* exp_ch3.adb (Build_Access_Subprogram_Wrapper_Body): Create a
proper signature when the access type denotes a parameterless
subprogram.
* exp_ch6.adb (Expand_Call): Handle properly a  parameterless
indirect call when the corresponding access type has contracts.

4 years ago[Ada] Further improve the expansion of array aggregates
Eric Botcazou [Fri, 29 May 2020 14:30:54 +0000 (16:30 +0200)]
[Ada] Further improve the expansion of array aggregates

gcc/ada/

* exp_aggr.adb
(Convert_To_Positional): Add Dims local variable
and pass it in calls to Is_Flat and Flatten.
(Check_Static_Components): Pass Dims in call to
Is_Static_Element.
(Nonflattenable_Next_Aggr): New predicate.
(Flatten): Add Dims parameter and Expr local variable.  Call
Nonflattenable_Next_Aggr in a couple of places.  In the case
when an Others choice is present, check that the element is
either static or a nested aggregate that can be flattened,
before disregarding the replication limit for elaboration
purposes.  Check that a nested array is flattenable in the case
of a multidimensional array in any position.  Remove redundant
check in the Others case and pass Dims in call to
Is_Static_Element.  Use Expr variable.
(Is_Flat): Change type of Dims parameter from Int to Nat.
(Is_Static_Element): Add Dims parameter.  Replace tests on
literals with call to Compile_Time_Known_Value.  If everything
else failed and the dimension is 1, preanalyze the expression
before calling again Compile_Time_Known_Value on it.  Return
true for null.
(Late_Expansion): Do not expand further if the assignment to the
target can be done directly by the back end.

4 years ago[Ada] Preserve casing of output files
Arnaud Charlet [Fri, 29 May 2020 08:41:00 +0000 (04:41 -0400)]
[Ada] Preserve casing of output files

gcc/ada/

* osint-c.adb (Set_File_Name): Preserve casing of file.
* osint.adb (File_Names_Equal): New.
(Executable_Name): Use File_Equal instead of
Canonical_Case_File_Name.

4 years ago[Ada] Fix memory leak in routine Wait_On_Socket
Pascal Obry [Fri, 22 May 2020 16:37:17 +0000 (18:37 +0200)]
[Ada] Fix memory leak in routine Wait_On_Socket

gcc/ada/

* libgnat/g-socket.adb (Wait_On_Socket): Fix memory leaks and
file descriptor leaks.  A memory leak was created each time the
routine was called without a selector (Selector = Null). Also,
in case of exception in the routine a memory leak and descriptor
leak was created as the created file selector was not closed.

4 years ago[Ada] Minor style fixes
Pascal Obry [Fri, 22 May 2020 16:36:36 +0000 (18:36 +0200)]
[Ada] Minor style fixes

gcc/ada/

* libgnat/g-socket.adb: Minor style fixes.

4 years ago[Ada] Potentially unevaluated nested expressions
Javier Miranda [Wed, 27 May 2020 20:44:40 +0000 (16:44 -0400)]
[Ada] Potentially unevaluated nested expressions

gcc/ada/

* sem_util.adb
(Immediate_Context_Implies_Is_Potentially_Unevaluated): New
subprogram.
(Is_Potentially_Unevaluated): Do not stop climbing the tree on
the first candidate subexpression; required to handle nested
expressions.

4 years ago[Ada] Reformatting and typo corrections
Gary Dismukes [Wed, 27 May 2020 20:44:12 +0000 (16:44 -0400)]
[Ada] Reformatting and typo corrections

gcc/ada/

* exp_aggr.adb, exp_spark.adb, sem_ch13.ads, sem_ch13.adb,
snames.ads-tmpl: Minor reformatting and typo fixes.

4 years ago[Ada] Fix detection of volatile properties in SPARK
Yannick Moy [Wed, 27 May 2020 14:46:27 +0000 (16:46 +0200)]
[Ada] Fix detection of volatile properties in SPARK

gcc/ada/

* sem_util.adb (Has_Enabled_Property): Add handling of
non-variable objects.

4 years ago[Ada] Cleanup excessive conditions in Check_Completion
Piotr Trojanek [Thu, 28 May 2020 10:14:38 +0000 (12:14 +0200)]
[Ada] Cleanup excessive conditions in Check_Completion

gcc/ada/

* sem_ch3.adb (Check_Completion): Refactor chained
if-then-elsif-...  statement to be more like a case
statement (note: we can't simply use case statement because of
Is_Intrinsic_Subprogram in the first condition).

4 years ago[Ada] Remove references to non-existing E_Protected_Object
Piotr Trojanek [Wed, 27 May 2020 15:41:40 +0000 (17:41 +0200)]
[Ada] Remove references to non-existing E_Protected_Object

gcc/ada/

* einfo.ads (E_Protected_Object): Enumeration literal removed.
* lib-xref.ads (Xref_Entity_Letters): Remove reference to
removed literal.
* sem_ch3.adb (Check_Completion): Likewise.
* sem_util.adb (Has_Enabled_Property): Likewise.

4 years ago[Ada] Use small limit for aggregates inside subprograms
Arnaud Charlet [Mon, 2 Mar 2020 13:43:20 +0000 (08:43 -0500)]
[Ada] Use small limit for aggregates inside subprograms

gcc/ada/

* exp_aggr.adb (Max_Aggregate_Size): Use small limit for
aggregate inside subprograms.
* sprint.adb (Sprint_Node_Actual [N_Object_Declaration]): Do not
print the initialization expression if the No_Initialization
flag is set.
* sem_util.ads, sem_util.adb (Predicate_Enabled): New.
* exp_ch4.adb (Expand_N_Type_Conversion): Code cleanup and apply
predicate check consistently.
* exp_ch6.adb (Expand_Actuals.By_Ref_Predicate_Check): Ditto.
* sem_ch3.adb (Analyze_Object_Declaration): Ditto.
* exp_ch3.adb (Build_Assignment): Revert handling of predicate
check for allocators with qualified expressions, now handled in
Freeze_Expression directly.
* sem_aggr.adb: Fix typos.
* checks.adb: Code refactoring: use Predicate_Enabled.
(Apply_Predicate_Check): Code cleanup.
* freeze.adb (Freeze_Expression): Freeze the subtype mark before
a qualified expression on an allocator.
* exp_util.ads, exp_util.adb (Within_Internal_Subprogram):
Renamed Predicate_Check_In_Scope to clarify usage, refine
handling of predicates within init procs which should be enabled
when the node comes from source.
* sem_ch13.adb (Freeze_Entity_Checks): Update call to
Predicate_Check_In_Scope.

4 years ago[Ada] Small cleanup throughout Exp_Ch4
Eric Botcazou [Wed, 27 May 2020 20:42:27 +0000 (22:42 +0200)]
[Ada] Small cleanup throughout Exp_Ch4

gcc/ada/

* exp_ch4.adb (Expand_Array_Comparison): Reformat.
(Expand_Concatenate): Use standard size values directly and use
Standard_Long_Long_Unsigned instead of RE_Long_Long_Unsigned.
(Expand_Modular_Op): Use Standard_Long_Long_Integer in case the
modulus is larger than Integer.
(Expand_N_Op_Expon): Use standard size value directly.
(Narrow_Large_Operation): Use Uint instead of Nat for sizes and
use a local variable for the size of the type.
(Get_Size_For_Range): Return Uint instead of Nat.
(Is_OK_For_Range): Take Uint instead of Nat.

4 years ago[Ada] Spurious error in generic dispatching constructor call
Javier Miranda [Tue, 26 May 2020 18:54:15 +0000 (14:54 -0400)]
[Ada] Spurious error in generic dispatching constructor call

gcc/ada/

* exp_ch6.adb (Make_Build_In_Place_Iface_Call_In_Allocator):
Build the internal anonymous access type using as a reference
the designated type imposed by the context (instead of using the
return type of the called function).

4 years ago[Ada] Fix assertion failure on (in-)out function parameter
Yannick Moy [Wed, 27 May 2020 15:30:23 +0000 (17:30 +0200)]
[Ada] Fix assertion failure on (in-)out function parameter

gcc/ada/

* sem_res.adb (Resolve_Actuals): Protect call to
Is_Valued_Procedure.

4 years ago[Ada] Revert too late setting of Ekind on discriminants
Piotr Trojanek [Wed, 27 May 2020 11:26:36 +0000 (13:26 +0200)]
[Ada] Revert too late setting of Ekind on discriminants

gcc/ada/

* sem_ch3.adb (Process_Discriminants): Revert recent change to
location of Set_Ekind; detect effectively volatile discriminants
by their type only.

4 years ago[Ada] Add global contracts to Ada.Numerics.Big_Numbers libraries
Joffrey Huguet [Tue, 26 May 2020 16:06:58 +0000 (18:06 +0200)]
[Ada] Add global contracts to Ada.Numerics.Big_Numbers libraries

gcc/ada/

* libgnat/a-nbnbin.ads, libgnat/a-nbnbre.ads: Add global
contract (Global => null) to all functions.

4 years ago[Ada] Part of implementation of AI12-0212: container aggregates
Ed Schonberg [Tue, 26 May 2020 19:39:38 +0000 (15:39 -0400)]
[Ada] Part of implementation of AI12-0212: container aggregates

gcc/ada/

* aspects.ads: Add Aspect_Aggregate.
* exp_aggr.adb (Expand_Container_Aggregate): Expand positional
container aggregates into separate initialization and insertion
operations.
* sem_aggr.ads (Resolve_Container_Aggregate): New subprogram.
* sem_aggr.adb (Resolve_Container_Aggregate): Parse aspect
aggregate, establish element types and key types if present, and
resolve aggregate components.
* sem_ch13.ads (Parse_Aspect_Aggregate): Public subprogram used
in validation, resolution and expansion of container aggregates
* sem_ch13.adb
(Parse_Aspect_Aggregate): Retrieve names of primitives specified
in aspect specification.
(Validate_Aspect_Aggregate): Check legality of specified
operations given in aspect specification, before nane
resolution.
(Resolve_Aspect_Aggregate): At freeze point resolve operations
and verify that given operations have the required profile.
* sem_res.adb (Resolve): Call Resolve_Aspect_Aggregate if aspect
is present for type.
* snames.ads-tmpl: Add names used in aspect Aggregate: Empty,
Add_Named, Add_Unnamed, New_Indexed, Assign_Indexed.

4 years ago[Ada] Make System.Generic_Bignums more flexible
Arnaud Charlet [Mon, 25 May 2020 15:30:56 +0000 (11:30 -0400)]
[Ada] Make System.Generic_Bignums more flexible

gcc/ada/

* Makefile.rtl (GNATRTL_NONTASKING_OBJS): Add s-shabig.o.
* libgnat/s-shabig.ads: New file to share definitions.
* libgnat/s-genbig.ads, libgnat/s-genbig.adb: Reorganized to
make it more generic and flexible in terms of memory allocation
and data structure returned.
(To_String): Moved to System.Generic_Bignums to allow sharing
this code.
(Big_And, Big_Or, Big_Shift_Left, Big_Shift_Right): New.
* libgnat/s-bignum.adb, libgnat/s-bignum.ads: Adapt to new
System.Generic_Bignums spec.
* libgnat/a-nbnbin.adb: Likewise.
(To_String): Moved to System.Generic_Bignums to allow sharing
this code.
* libgnat/a-nbnbre.adb (Normalize): Fix handling of Num = 0
leading to an exception.

4 years ago[Ada] Fix crash on quantified expression in expression function (2)
Eric Botcazou [Tue, 26 May 2020 18:06:14 +0000 (20:06 +0200)]
[Ada] Fix crash on quantified expression in expression function (2)

gcc/ada/

* freeze.adb (Freeze_Expr_Types): Replace call to Find_Aspect
with call to Find_Value_Of_Aspect and adjust accordingly.

4 years ago[Ada] Fix crash on quantified expression in expression function
Eric Botcazou [Tue, 26 May 2020 10:55:26 +0000 (12:55 +0200)]
[Ada] Fix crash on quantified expression in expression function

gcc/ada/

* einfo.adb (Write_Field24_Name): Handle E_Loop_Parameter.
* freeze.adb (Freeze_Expr_Types): Freeze the iterator type used as
Default_Iterator of the name of an N_Iterator_Specification node.

4 years ago[Ada] Fix internal error on if-expression in call returning tagged type
Eric Botcazou [Mon, 25 May 2020 21:27:46 +0000 (23:27 +0200)]
[Ada] Fix internal error on if-expression in call returning tagged type

gcc/ada/

* checks.adb (Determine_Range): Deal with Min and Max attributes.
* exp_ch6.adb (Expand_Call_Helper): When generating code to pass
the accessibility level to the caller in the case of an actual
which is an if-expression, also remove the nodes created after
the declaration of the dummy temporary.
* sem_ch6.adb (Analyze_Subprogram_Body_Helper): Use Natural as
the type of the minimum accessibility level object.

4 years ago[Ada] Fix failing assertions related to volatile objects
Piotr Trojanek [Tue, 26 May 2020 10:19:01 +0000 (12:19 +0200)]
[Ada] Fix failing assertions related to volatile objects

gcc/ada/

* sem_ch3.adb (Process_Discriminants): Set Ekind of the
processed discriminant entity before passing to
Is_Effectively_Volatile, which was crashing on a failed
assertion.
* sem_prag.adb (Analyze_External_Property_In_Decl_Part): Prevent
call to No_Caching_Enabled with entities other than variables,
which was crashing on a failed assertion.
(Analyze_Pragma): Style cleanups.
* sem_util.adb (Is_Effectively_Volatile): Enforce comment with
an assertion; prevent call to No_Caching_Enabled with entities
other than variables.
(Is_Effectively_Volatile_Object): Only call
Is_Effectively_Volatile on objects, not on types.
(No_Caching_Enabled): Enforce comment with an assertion.

4 years ago[Ada] Remove use of debug flag -gnatdF for GNATprove
Yannick Moy [Tue, 26 May 2020 08:15:18 +0000 (10:15 +0200)]
[Ada] Remove use of debug flag -gnatdF for GNATprove

gcc/ada/

* debug.adb: Update comments to free usage of -gnatdF.

4 years ago[Ada] Reuse SPARK expansion of attribute Update for delta_aggregate
Piotr Trojanek [Wed, 6 May 2020 20:02:11 +0000 (22:02 +0200)]
[Ada] Reuse SPARK expansion of attribute Update for delta_aggregate

gcc/ada/

* exp_spark.adb (Expand_SPARK_Delta_Or_Update): Refactored from
Expand_SPARK_N_Attribute_Reference; rewrite into N_Aggregate or
N_Delta_Aggregate depending on what is being rewritten.
(Expand_SPARK_N_Delta_Aggregate): New routine to expand
delta_aggregate.
(Expand_SPARK_N_Attribute_Reference): Call the refactored
routine.

4 years ago[Ada] Fix expansion of 'Update with multiple choices in GNATprove
Piotr Trojanek [Thu, 21 May 2020 13:42:32 +0000 (15:42 +0200)]
[Ada] Fix expansion of 'Update with multiple choices in GNATprove

gcc/ada/

* exp_spark.adb (Expand_SPARK_N_Attribute_Reference): Fix
expansion of attribute Update.

4 years ago[Ada] Crash in Walk_Library_Items on ghost units
Arnaud Charlet [Sat, 23 May 2020 18:50:10 +0000 (20:50 +0200)]
[Ada] Crash in Walk_Library_Items on ghost units

gcc/ada/

* sem.adb (Walk_Library_Items): Fix handling of Ghost units.

4 years agofix constant folding from array CTORs
Richard Biener [Thu, 9 Jul 2020 14:03:45 +0000 (16:03 +0200)]
fix constant folding from array CTORs

This fixes the case where we try to fold a read from an
array initalizer and happen to cross the boundary of
multiple CTORs which isn't really supported.  For the
interesting cases like the testcase we actually handle
the folding by encoding the whole initializer.

2020-07-10  Richard Biener  <rguenther@suse.de>

PR tree-optimization/96133
* gimple-fold.c (fold_array_ctor_reference): Do not
recurse to folding a CTOR that does not fully cover the
asked for object.

* gcc.dg/torture/pr96133.c: New testcase.

4 years agoInitial Sapphire Rapids and Alder Lake support from ISA r40
Cui,Lili [Wed, 24 Jun 2020 05:08:11 +0000 (13:08 +0800)]
Initial Sapphire Rapids and Alder Lake support from ISA r40

gcc/
* common/config/i386/cpuinfo.h
(get_intel_cpu): Handle sapphirerapids.
* common/config/i386/i386-common.c
(processor_names): Add sapphirerapids and alderlake.
(processor_alias_table): Add sapphirerapids and alderlake.
* common/config/i386/i386-cpuinfo.h
(processor_subtypes): Add INTEL_COREI7_ALDERLAKE and
INTEL_COREI7_ALDERLAKE.
* config.gcc: Add -march=sapphirerapids and alderlake.
* config/i386/driver-i386.c
(host_detect_local_cpu) Handle sapphirerapids and alderlake.
* config/i386/i386-c.c
(ix86_target_macros_internal): Handle sapphirerapids and alderlake.
* config/i386/i386-options.c
(m_SAPPHIRERAPIDS) : Define.
(m_ALDERLAKE): Ditto.
(m_CORE_AVX512) : Add m_SAPPHIRERAPIDS.
(processor_cost_table): Add sapphirerapids and alderlake.
(ix86_option_override_internal) Handle PTA_WAITPKG, PTA_ENQCMD,
PTA_CLDEMOTE, PTA_SERIALIZE, PTA_TSXLDTRK.
* config/i386/i386.h
(ix86_size_cost) : Define SAPPHIRERAPIDS and ALDERLAKE.
(processor_type) : Add PROCESSOR_SAPPHIRERAPIDS and
PROCESSOR_ALDERLAKE.
(PTA_ENQCMD): New.
(PTA_CLDEMOTE): Ditto.
(PTA_SERIALIZE): Ditto.
(PTA_TSXLDTRK): New.
(PTA_SAPPHIRERAPIDS): Ditto.
(PTA_ALDERLAKE): Ditto.
(processor_type) : Add PROCESSOR_SAPPHIRERAPIDS and
PROCESSOR_ALDERLAKE.
* doc/extend.texi: Add sapphirerapids and alderlake.
* doc/invoke.texi: Add sapphirerapids and alderlake.

gcc/testsuite/
* gcc.target/i386/funcspec-56.inc: Handle new march.
* g++.target/i386/mv16.C: Handle new march

4 years agoAdd -fdump-profile-report.
Martin Liska [Thu, 9 Jul 2020 09:58:11 +0000 (11:58 +0200)]
Add -fdump-profile-report.

When using -fprofile-report, -fdump-profile-report can be used to
print the report to a foo.c.000i.profile-report file instead
of stderr. I see it handy for comparison purpose.

gcc/ChangeLog:

* dumpfile.c [profile-report]: Add new profile dump.
* dumpfile.h (enum tree_dump_index): Ad TDI_profile_report.
* passes.c (pass_manager::dump_profile_report): Change stderr
to dump_file.

4 years agovect: Use adjusted niters by considering peeling prologue
Kewen Lin [Fri, 10 Jul 2020 02:58:28 +0000 (21:58 -0500)]
vect: Use adjusted niters by considering peeling prologue

This patch is derived from the review of vector with length patch
series.  I relaxed the guard on LOOP_VINFO_PEELING_FOR_ALIGNMENT for
vector with length as Richard S.'s suggestion, then encountered one
failure from case gcc.dg/vect/vect-ifcvt-11.c with param
vect-partial-vector-usage=2 enablement run.  The root cause is that
we still use the original niters for the loop body vectorization,
it leads the access to go out of bound, instead we should use
LOOP_VINFO_NITERS which has been adjusted in vect_do_peeling by
considering the peeling number for prologue.

Bootstrapped/regtested on aarch64-linux-gnu and powerpc64le-linux-gnu.

gcc/ChangeLog:

* tree-vect-loop.c (vect_transform_loop): Use LOOP_VINFO_NITERS which
is adjusted by considering peeled prologue for non
vect_use_loop_mask_for_alignment_p cases.

4 years agoDaily bump.
GCC Administrator [Fri, 10 Jul 2020 00:16:28 +0000 (00:16 +0000)]
Daily bump.

4 years agoopenacc: Set bias to zero for explicit attach/detach clauses in C and C++
Julian Brown [Tue, 9 Jun 2020 13:21:34 +0000 (06:21 -0700)]
openacc: Set bias to zero for explicit attach/detach clauses in C and C++

This is a fix for the pointer (or array) size inadvertently being used
for the bias with attach and detach mapping kinds, for both C and C++.

2020-07-09  Julian Brown  <julian@codesourcery.com>
    Thomas Schwinge  <thomas@codesourcery.com>

gcc/c/
PR middle-end/95270
* c-typeck.c (c_finish_omp_clauses): Set OMP_CLAUSE_SIZE (bias) to zero
for standalone attach/detach clauses.

gcc/cp/
PR middle-end/95270
* semantics.c (finish_omp_clauses): Likewise.

include/
PR middle-end/95270
* gomp-constants.h (gomp_map_kind): Expand comment for attach/detach
mapping kinds.

gcc/testsuite/
PR middle-end/95270
* c-c++-common/goacc/mdc-1.c: Update expected dump output for zero
bias.

libgomp/
PR middle-end/95270
* testsuite/libgomp.oacc-c-c++-common/pr95270-1.c: New test.
* testsuite/libgomp.oacc-c-c++-common/pr95270-2.c: New test.

4 years agoopenacc: GOMP_MAP_ATTACH handling in find_group_last
Julian Brown [Thu, 11 Jun 2020 13:43:59 +0000 (06:43 -0700)]
openacc: GOMP_MAP_ATTACH handling in find_group_last

Arrange for GOMP_MAP_ATTACH to be grouped together with a preceding
GOMP_MAP_TO_PSET or other "to" data movement clause, except in cases
where an explicit "attach" clause is used.

2020-07-09  Julian Brown  <julian@codesourcery.com>

include/
* gomp-constants.h (gomp_map_kind): Update comment for GOMP_MAP_TO_PSET.

libgomp/
* oacc-mem.c (find_group_last): Group data-movement clauses
(GOMP_MAP_TO_PSET, GOMP_MAP_TO, etc.) together with a subsequent
GOMP_MAP_ATTACH.  Allow standalone GOMP_MAP_ATTACH also.

4 years agoopenacc: Fortran derived-type mapping fix
Julian Brown [Wed, 3 Jun 2020 21:25:19 +0000 (14:25 -0700)]
openacc: Fortran derived-type mapping fix

Fix a bug with mapping Fortran components which themselves have derived
types in the OpenACC 2.5+ manual deep-copy support.

2020-07-09  Julian Brown  <julian@codesourcery.com>

gcc/fortran/
* trans-openmp.c (gfc_trans_omp_clauses): Use 'inner' not 'decl' for
derived type members which themselves have derived types.

gcc/testsuite/
* gfortran.dg/goacc/mapping-tests-3.f90: New test.
* gfortran.dg/goacc/mapping-tests-4.f90: New test.

4 years agors6000: Allow MMA built-in initialization regardless of compiler options
Peter Bergner [Thu, 9 Jul 2020 20:52:59 +0000 (15:52 -0500)]
rs6000: Allow MMA built-in initialization regardless of compiler options

Built-in initialization occurs only once and fairly early, when the
command line options are in force.  If the -mcpu=<CPU> is pre-power10,
then we fail to initialize the MMA built-ins, so they are not
available to call in a #pragma target/attribute target function.
The fix is to basically always (on server type cpus) initialize the MMA
built-ins so we can use them in #pragma target/attribute target functions.

2020-07-09  Peter Bergner  <bergner@linux.ibm.com>

gcc/
PR target/96125
* config/rs6000/rs6000-call.c (rs6000_init_builtins): Define the MMA
specific types __vector_quad and __vector_pair, and initialize the
MMA built-ins if TARGET_EXTRA_BUILTINS is set.
(mma_init_builtins): Don't test for mask set in rs6000_builtin_mask.
Remove now unneeded mask variable.
* config/rs6000/rs6000.c (rs6000_option_override_internal): Add the
OPTION_MASK_MMA flag for power10 if not already set.

gcc/testsuite/
PR target/96125
* gcc.target/powerpc/pr96125.c: New test.

4 years agofixup BIT_FIELD_REF detection in SLP discovery
Richard Biener [Thu, 9 Jul 2020 14:06:04 +0000 (16:06 +0200)]
fixup BIT_FIELD_REF detection in SLP discovery

This fixes a thinko where we end up combining a BIT_FIELD_REF
and a memory access, fixed by checking all stmts are a load or
none.

2020-07-09  Richard Biener  <rguenther@suse.de>

PR tree-optimization/96133
* tree-vect-slp.c (vect_build_slp_tree_1): Compare load_p
status between stmts.

4 years agoc++: Partially revert fix for PR c++/95497 [PR96132]
Patrick Palka [Thu, 9 Jul 2020 17:47:13 +0000 (13:47 -0400)]
c++: Partially revert fix for PR c++/95497 [PR96132]

I was mistaken to assume that a dependent type is necessarily
incomplete, and indeed there are multiple places in the frontend where
we check a type for both dependency and completeness.  So this patch
partially reverts the fix for PR95497, restoring the dependent_type_p
check that guarded the call to is_really_empty_class below.

gcc/cp/ChangeLog:

PR c++/96132
* constexpr.c (potential_constant_expression_1) <case PARM_DECL>:
Restore dependent_type_p check that guarded the call to
is_really_empty_class.

gcc/testsuite/ChangeLog:

PR c++/96132
* g++.dg/template/incomplete12.C: New test.

4 years agox86: Enable FMA in rsqrt<mode>2 expander
H.J. Lu [Wed, 23 Jan 2019 14:33:58 +0000 (06:33 -0800)]
x86: Enable FMA in rsqrt<mode>2 expander

Enable FMA in rsqrt<mode>2 expander and fold rsqrtv16sf2 expander into
rsqrt<mode>2 expander which expands to UNSPEC_RSQRT28 for TARGET_AVX512ER.
Although it doesn't show performance change in our workloads, FMA can
improve other workloads.

gcc/

PR target/88713
* config/i386/i386-expand.c (ix86_emit_swsqrtsf): Enable FMA.
* config/i386/sse.md (VF_AVX512VL_VF1_128_256): New.
(rsqrt<mode>2): Replace VF1_128_256 with VF_AVX512VL_VF1_128_256.
(rsqrtv16sf2): Removed.

gcc/testsuite/

PR target/88713
* gcc.target/i386/pr88713-1.c: New test.
* gcc.target/i386/pr88713-2.c: Likewise.

4 years agoremove premature vect_verify_datarefs_alignment
Richard Biener [Wed, 8 Jul 2020 14:37:55 +0000 (16:37 +0200)]
remove premature vect_verify_datarefs_alignment

This followup removes vect_verify_datarefs_alignment and its
premature cancellation of vectorization leaving the actual
decision whether alignment is supported to the functions
deciding whether we can vectorize a load or store.

2020-07-08  Richard Biener  <rguenther@suse.de>

* tree-vectorizer.h (vect_verify_datarefs_alignment): Remove.
(vect_slp_analyze_and_verify_instance_alignment): Rename to ...
(vect_slp_analyze_instance_alignment): ... this.
* tree-vect-data-refs.c (verify_data_ref_alignment): Remove.
(vect_verify_datarefs_alignment): Likewise.
(vect_enhance_data_refs_alignment): Do not call
vect_verify_datarefs_alignment.
(vect_slp_analyze_node_alignment): Rename from
vect_slp_analyze_and_verify_node_alignment and do not
call verify_data_ref_alignment.
(vect_slp_analyze_instance_alignment): Rename from
vect_slp_analyze_and_verify_instance_alignment.
* tree-vect-stmts.c (vectorizable_store): Dump when
we vectorize an unaligned access.
(vectorizable_load): Likewise.
* tree-vect-loop.c (vect_analyze_loop_2): Do not call
vect_verify_datarefs_alignment.
* tree-vect-slp.c (vect_slp_analyze_bb_1): Adjust.

* gcc.dg/vect/bb-slp-10.c: Adjust.
* gcc.dg/vect/slp-45.c: Likewise.
* gcc.dg/vect/vect-109.c: Likewise.

4 years agoSchedule reduction partition in the last.
Bin Cheng [Thu, 9 Jul 2020 10:10:03 +0000 (18:10 +0800)]
Schedule reduction partition in the last.

If reduction partition's SCC is broken by runtime alias checks, force
a negative post order to it so that it will be scheduled in the last.

2020-07-09  Bin Cheng  <bin.cheng@linux.alibaba.com>

gcc/
PR tree-optimization/95804
* tree-loop-distribution.c (break_alias_scc_partitions): Force
negative post order to reduction partition.

gcc/testsuite/
PR tree-optimization/95804
* gcc.dg/tree-ssa/pr95804.c: New test.

4 years agoopenmp: Optimize triangular loop logical iterator to actual iterators computation...
Jakub Jelinek [Thu, 9 Jul 2020 10:07:17 +0000 (12:07 +0200)]
openmp: Optimize triangular loop logical iterator to actual iterators computation using search for quadratic equation root(s)

This patch implements the optimized logical to actual iterators
computation for triangular loops.

I have a rough implementation using integers, but this one uses floating
point.  There is a small problem that -fopenmp programs aren't linked with
-lm, so it does it only if the hw has sqrt optab (and uses ifn rather than
__builtin_sqrt because it obviously doesn't need errno handling etc.).

Do you think it is ok this way, or should I use the integral computation
using inlined isqrt (we have inequation of the form
start >= x * t10 + t11 * (((x - 1) * x) / 2)
where t10 and t11 are signed long long values and start unsigned long long,
and the division by 2 actually is a problem for accuracy in some cases, so
if we do it in integral, we need to do actually
      long long t12 = 2 * t10 - t11;
      unsigned long long t13 = t12 * t12 + start * 8 * t11;
      unsigned long long isqrt_ = isqrtull (t13);
      long long x = (((long long) isqrt_ - t12) / t11) >> 1;
with careful overflow checking on all the computations before isqrtull
(and on overflows use the fallback implementation).

2020-07-09  Jakub Jelinek  <jakub@redhat.com>

* omp-general.h (struct omp_for_data): Add min_inner_iterations
and factor members.
* omp-general.c (omp_extract_for_data): Initialize them and remember
them in OMP_CLAUSE_COLLAPSE_COUNT if needed and restore from there.
* omp-expand.c (expand_omp_for_init_counts): Fix up computation of
counts[fd->last_nonrect] if fd->loop.n2 is INTEGER_CST.
(expand_omp_for_init_vars): For
fd->first_nonrect + 1 == fd->last_nonrect loops with for now
INTEGER_CST fd->loop.n2 find quadratic equation roots instead of
using fallback method when possible.

* testsuite/libgomp.c/loop-19.c: New test.
* testsuite/libgomp.c/loop-20.c: New test.

4 years agoopenmp: Change omp_atv_default value and rename omp_atv_sequential to omp_atv_serialized.
Jakub Jelinek [Thu, 9 Jul 2020 09:29:30 +0000 (11:29 +0200)]
openmp: Change omp_atv_default value and rename omp_atv_sequential to omp_atv_serialized.

While this is an OpenMP 5.1 change, it is undesirable to let people use different
values and then deal with ABI backwards compatibility in a year or two.

2020-07-09  Jakub Jelinek  <jakub@redhat.com>

* omp.h.in (omp_alloctrait_value_t): Change omp_atv_default from
2 to -1.  Add omp_atv_serialized and define omp_atv_sequential using
it.  Remove __omp_alloctrait_value_max__.
* allocator.c (omp_init_allocator): Handle omp_atv_default for
omp_atk_alignment and omp_atk_pool_size.

4 years agoira: Fix unnecessary register spill
Omar Tahir [Thu, 9 Jul 2020 09:14:19 +0000 (10:14 +0100)]
ira: Fix unnecessary register spill

The variables first_moveable_pseudo and last_moveable_pseudo aren't
reset after compiling a function, which means they leak into the first
scheduler pass of the following function. In some cases, this can cause
an extra spill during register allocation of the second function.

gcc/ChangeLog:

* ira.c (move_unallocated_pseudos): Zero first_moveable_pseudo and
last_moveable_pseudo before returning.

gcc/testsuite/ChangeLog:

* gcc.target/aarch64/nospill.c: New test.

4 years agoaarch64: Fix BTI support in libitm
Szabolcs Nagy [Thu, 2 Jul 2020 16:12:05 +0000 (17:12 +0100)]
aarch64: Fix BTI support in libitm

sjlj.S did not have the GNU property note markup and the BTI c
instructions that are necessary when it is built with branch
protection.

The notes are only added when libitm is built with branch
protection, because old linkers mishandle the note (merge
them incorrectly or emit warnings), the BTI instructions
are added unconditionally.

2020-07-09  Szabolcs Nagy  <szabolcs.nagy@arm.com>

libitm/ChangeLog:

* config/aarch64/sjlj.S: Add BTI marking and related definitions,
and add BTI c to function entries.

4 years agoaarch64: Fix BTI support in libgcc [PR96001]
Szabolcs Nagy [Thu, 2 Jul 2020 16:11:56 +0000 (17:11 +0100)]
aarch64: Fix BTI support in libgcc [PR96001]

lse.S did not have the GNU property note markup and the BTI c
instructions that are necessary when it is built with branch
protection.

The notes are only added when libgcc is built with branch
protection, because old linkers mishandle the note (merge
them incorrectly or emit warnings), the BTI instructions
are added unconditionally.

Note: BTI c is only necessary at function entry if the function
may be called indirectly, currently lse functions are not called
indirectly, but BTI is added for ABI reasons e.g. to allow
linkers later to emit stub code with indirect jump.

2020-07-09  Szabolcs Nagy  <szabolcs.nagy@arm.com>

libgcc/ChangeLog:

PR target/96001
* config/aarch64/lse.S: Add BTI marking and related definitions,
and add BTI c to function entries.

4 years agoaarch64: Fix noexecstack note in libgcc
Szabolcs Nagy [Fri, 3 Jul 2020 13:11:49 +0000 (14:11 +0100)]
aarch64: Fix noexecstack note in libgcc

lse.S did not have GNU stack note, this may cause missing
PT_GNU_STACK in binaries on Linux and FreeBSD.

2020-07-09  Szabolcs Nagy  <szabolcs.nagy@arm.com>

libgcc/ChangeLog:

* config/aarch64/lse.S: Add stack note.

4 years agoaarch64: Fix noexecstack note in libitm
Szabolcs Nagy [Fri, 3 Jul 2020 13:09:25 +0000 (14:09 +0100)]
aarch64: Fix noexecstack note in libitm

sjlj.S only had the note on Linux, but it is supposed
to have it on FreeBSD too.

2020-07-09  Szabolcs Nagy  <szabolcs.nagy@arm.com>

libitm/ChangeLog:

* config/aarch64/sjlj.S: Add stack note if __FreeBSD__ is defined.

4 years agoaarch64: Add missing ACLE support for BTI
Szabolcs Nagy [Thu, 2 Jul 2020 15:04:51 +0000 (16:04 +0100)]
aarch64: Add missing ACLE support for BTI

Define the __ARM_FEATURE_BTI_DEFAULT feature test
macro when BTI branch protection is enabled.

2020-07-09  Szabolcs Nagy  <szabolcs.nagy@arm.com>

gcc/ChangeLog:

* config/aarch64/aarch64-c.c (aarch64_update_cpp_builtins): Add
__ARM_FEATURE_BTI_DEFAULT support.

4 years agoaarch64: Mitigate SLS for BLR instruction
Matthew Malcomson [Thu, 9 Jul 2020 08:11:59 +0000 (09:11 +0100)]
aarch64: Mitigate SLS for BLR instruction

This patch introduces the mitigation for Straight Line Speculation past
the BLR instruction.

This mitigation replaces BLR instructions with a BL to a stub which uses
a BR to jump to the original value.  These function stubs are then
appended with a speculation barrier to ensure no straight line
speculation happens after these jumps.

When optimising for speed we use a set of stubs for each function since
this should help the branch predictor make more accurate predictions
about where a stub should branch.

When optimising for size we use one set of stubs for all functions.
This set of stubs can have human readable names, and we are using
`__call_indirect_x<N>` for register x<N>.

When BTI branch protection is enabled the BLR instruction can jump to a
`BTI c` instruction using any register, while the BR instruction can
only jump to a `BTI c` instruction using the x16 or x17 registers.
Hence, in order to ensure this transformation is safe we mov the value
of the original register into x16 and use x16 for the BR.

As an example when optimising for size:
a
    BLR x0
instruction would get transformed to something like
    BL __call_indirect_x0
where __call_indirect_x0 labels a thunk that contains
__call_indirect_x0:
    MOV X16, X0
    BR X16
    <speculation barrier>

The first version of this patch used local symbols specific to a
compilation unit to try and avoid relocations.
This was mistaken since functions coming from the same compilation unit
can still be in different sections, and the assembler will insert
relocations at jumps between sections.

On any relocation the linker is permitted to emit a veneer to handle
jumps between symbols that are very far apart.  The registers x16 and
x17 may be clobbered by these veneers.
Hence the function stubs cannot rely on the values of x16 and x17 being
the same as just before the function stub is called.

Similar can be said for the hot/cold partitioning of single functions,
so function-local stubs have the same restriction.

This updated version of the patch never emits function stubs for x16 and
x17, and instead forces other registers to be used.

Given the above, there is now no benefit to local symbols (since they
are not enough to avoid dealing with linker intricacies).  This patch
now uses global symbols with hidden visibility each stored in their own
COMDAT section.  This means stubs can be shared between compilation
units while still avoiding the PLT indirection.

This patch also removes the `__call_indirect_x30` stub (and
function-local equivalent) which would simply jump back to the original
location.

The function-local stubs are emitted to the assembly output file in one
chunk, which means we need not add the speculation barrier directly
after each one.
This is because we know for certain that the instructions directly after
the BR in all but the last function stub will be from another one of
these stubs and hence will not contain a speculation gadget.
Instead we add a speculation barrier at the end of the sequence of
stubs.

The global stubs are emitted in COMDAT/.linkonce sections by
themselves so that the linker can remove duplicates from multiple object
files.  This means they are not emitted in one chunk, and each one must
include the speculation barrier.

Another difference is that since the global stubs are shared across
compilation units we do not know that all functions will be targeting an
architecture supporting the SB instruction.
Rather than provide multiple stubs for each architecture, we provide a
stub that will work for all architectures -- using the DSB+ISB barrier.

This mitigation does not apply for BLR instructions in the following
places:
- Some accesses to thread-local variables use a code sequence with a BLR
  instruction.  This code sequence is part of the binary interface between
  compiler and linker. If this BLR instruction needs to be mitigated, it'd
  probably be best to do so in the linker. It seems that the code sequence
  for thread-local variable access is unlikely to lead to a Spectre Revalation
  Gadget.
- PLT stubs are produced by the linker and each contain a BLR instruction.
  It seems that at most only after the last PLT stub a Spectre Revalation
  Gadget might appear.

Testing:
  Bootstrap and regtest on AArch64
    (with BOOT_CFLAGS="-mharden-sls=retbr,blr")
  Used a temporary hack(1) in gcc-dg.exp to use these options on every
  test in the testsuite, a slight modification to emit the speculation
  barrier after every function stub, and a script to check that the
  output never emitted a BLR, or unmitigated BR or RET instruction.
  Similar on an aarch64-none-elf cross-compiler.

1) Temporary hack emitted a speculation barrier at the end of every stub
function, and used a script to ensure that:
  a) Every RET or BR is immediately followed by a speculation barrier.
  b) No BLR instruction is emitted by compiler.

gcc/ChangeLog:

* config/aarch64/aarch64-protos.h (aarch64_indirect_call_asm):
New declaration.
* config/aarch64/aarch64.c (aarch64_regno_regclass): Handle new
stub registers class.
(aarch64_class_max_nregs): Likewise.
(aarch64_register_move_cost): Likewise.
(aarch64_sls_shared_thunks): Global array to store stub labels.
(aarch64_sls_emit_function_stub): New.
(aarch64_create_blr_label): New.
(aarch64_sls_emit_blr_function_thunks): New.
(aarch64_sls_emit_shared_blr_thunks): New.
(aarch64_asm_file_end): New.
(aarch64_indirect_call_asm): New.
(TARGET_ASM_FILE_END): Use aarch64_asm_file_end.
(TARGET_ASM_FUNCTION_EPILOGUE): Use
aarch64_sls_emit_blr_function_thunks.
* config/aarch64/aarch64.h (STB_REGNUM_P): New.
(enum reg_class): Add STUB_REGS class.
(machine_function): Introduce `call_via` array for
function-local stub labels.
* config/aarch64/aarch64.md (*call_insn, *call_value_insn): Use
aarch64_indirect_call_asm to emit code when hardening BLR
instructions.
* config/aarch64/constraints.md (Ucr): New constraint
representing registers for indirect calls.  Is GENERAL_REGS
usually, and STUB_REGS when hardening BLR instruction against
SLS.
* config/aarch64/predicates.md (aarch64_general_reg): STUB_REGS class
is also a general register.

gcc/testsuite/ChangeLog:

* gcc.target/aarch64/sls-mitigation/sls-miti-blr-bti.c: New test.
* gcc.target/aarch64/sls-mitigation/sls-miti-blr.c: New test.

4 years agoaarch64: Introduce SLS mitigation for RET and BR instructions
Matthew Malcomson [Thu, 9 Jul 2020 08:11:59 +0000 (09:11 +0100)]
aarch64: Introduce SLS mitigation for RET and BR instructions

Instructions following RET or BR are not necessarily executed.  In order
to avoid speculation past RET and BR we can simply append a speculation
barrier.

Since these speculation barriers will not be architecturally executed,
they are not expected to add a high performance penalty.

The speculation barrier is to be SB when targeting architectures which
have this enabled, and DSB SY + ISB otherwise.

We add tests for each of the cases where such an instruction was seen.

This is implemented by modifying each machine description pattern that
emits either a RET or a BR instruction.  We choose not to use something
like `TARGET_ASM_FUNCTION_EPILOGUE` since it does not affect the
`indirect_jump`, `jump`, `sibcall_insn` and `sibcall_value_insn`
patterns and we find it preferable to implement the functionality in the
same way for every pattern.

There is one particular case which is slightly tricky.  The
implementation of TARGET_ASM_TRAMPOLINE_TEMPLATE uses a BR which needs
to be mitigated against.  The trampoline template is used *once* per
compilation unit, and the TRAMPOLINE_SIZE is exposed to the user via the
builtin macro __LIBGCC_TRAMPOLINE_SIZE__.
In the future we may implement function specific attributes to turn on
and off hardening on a per-function basis.
The fixed nature of the trampoline described above implies it will be
safer to ensure this speculation barrier is always used.

Testing:
  Bootstrap and regtest done on aarch64-none-linux
  Used a temporary hack(1) to use these options on every test in the
  testsuite and a script to check that the output never emitted an
  unmitigated RET or BR.

1) Temporary hack was a change to the testsuite to always use
`-save-temps` and run a script on the assembly output of those
compilations which produced one to ensure every RET or BR is immediately
followed by a speculation barrier.

gcc/ChangeLog:

* config/aarch64/aarch64-protos.h (aarch64_sls_barrier): New.
* config/aarch64/aarch64.c (aarch64_output_casesi): Emit
speculation barrier after BR instruction if needs be.
(aarch64_trampoline_init): Handle ptr_mode value & adjust size
of code copied.
(aarch64_sls_barrier): New.
(aarch64_asm_trampoline_template): Add needed barriers.
* config/aarch64/aarch64.h (AARCH64_ISA_SB): New.
(TARGET_SB): New.
(TRAMPOLINE_SIZE): Account for barrier.
* config/aarch64/aarch64.md (indirect_jump, *casesi_dispatch,
simple_return, *do_return, *sibcall_insn, *sibcall_value_insn):
Emit barrier if needs be, also account for possible barrier using
"sls_length" attribute.
(sls_length): New attribute.
(length): Determine default using any non-default sls_length
value.

gcc/testsuite/ChangeLog:

* gcc.target/aarch64/sls-mitigation/sls-miti-retbr.c: New test.
* gcc.target/aarch64/sls-mitigation/sls-miti-retbr-pacret.c:
New test.
* gcc.target/aarch64/sls-mitigation/sls-mitigation.exp: New file.
* lib/target-supports.exp (check_effective_target_aarch64_asm_sb_ok):
New proc.

4 years agoaarch64: New Straight Line Speculation (SLS) mitigation flags
Matthew Malcomson [Thu, 9 Jul 2020 08:11:58 +0000 (09:11 +0100)]
aarch64: New Straight Line Speculation (SLS) mitigation flags

Here we introduce the flags that will be used for straight line speculation.

The new flag introduced is `-mharden-sls=`.
This flag can take arguments of `none`, `all`, or a comma seperated list of one
or more of `retbr` or `blr`.
`none` indicates no special mitigation of the straight line speculation
vulnerability.
`all` requests all mitigations currently implemented.
`retbr` requests that the RET and BR instructions have a speculation barrier
inserted after them.
`blr` requests that BLR instructions are replaced by a BL to a function stub
using a BR with a speculation barrier after it.

Setting this on a per-function basis using attributes or the like is not
enabled, but may be in the future.

gcc/ChangeLog:

2020-06-02  Matthew Malcomson  <matthew.malcomson@arm.com>

* config/aarch64/aarch64-protos.h (aarch64_harden_sls_retbr_p):
New.
(aarch64_harden_sls_blr_p): New.
* config/aarch64/aarch64.c (enum aarch64_sls_hardening_type):
New.
(aarch64_harden_sls_retbr_p): New.
(aarch64_harden_sls_blr_p): New.
(aarch64_validate_sls_mitigation): New.
(aarch64_override_options): Parse options for SLS mitigation.
* config/aarch64/aarch64.opt (-mharden-sls): New option.
* doc/invoke.texi: Document new option.

4 years agovect: Enhance condition check to use partial vectors
Kewen Lin [Thu, 9 Jul 2020 03:27:41 +0000 (22:27 -0500)]
vect: Enhance condition check to use partial vectors

This patch is derived from the review of vector with length patch
series.  The length-based partial vector approach doesn't support
reduction so far, so we would like to disable vectorization with
partial vectors explicitly for it in vectorizable_condition.
Otherwise, it will cause some unexpected failures for a few cases
like gcc.dg/vect/pr65947-2.c.

But if we disable it for the cases excepting for reduction_type equal
to EXTRACT_LAST_REDUCTION, it cause one regression failure on aarch64:

  gcc.target/aarch64/sve/reduc_8.c -march=armv8.2-a+sve

The disabling makes the outer loop can't work with partial vectors,
the check fails.  But the case is safe to adopt it.  As Richard S.
pointed out in the review comments, the extra inactive lanes only
matter for double reductions, so this patch is to permit vectorization
with partial vectors for cases EXTRACT_LAST_REDUCTION or nested-cycle
reduction.

Bootstrapped/regtested on aarch64-linux-gnu.

gcc/ChangeLog:

* tree-vect-stmts.c (vectorizable_condition): Prohibit vectorization
with partial vectors explicitly excepting for EXTRACT_LAST_REDUCTION
or nested-cycle reduction.

4 years agovect/testsuite: Adjust dumping for fully masking decision
Kewen Lin [Thu, 9 Jul 2020 03:18:54 +0000 (22:18 -0500)]
vect/testsuite: Adjust dumping for fully masking decision

As Richard S. suggested in the review of vector with length patch
series, we can use one message on "partial vectors" instead of
"fully with masking".  This patch is to update the dumping string
and related test cases.

Bootstrapped/regtested on aarch64-linux-gnu.

gcc/ChangeLog:

* tree-vect-loop.c (vect_analyze_loop_2): Update dumping string
for fully masking to be more common.

gcc/testsuite/ChangeLog:

* gcc.target/aarch64/sve/clastb_1.c: Update dumping string.
* gcc.target/aarch64/sve/clastb_2.c: Likewise.
* gcc.target/aarch64/sve/clastb_3.c: Likewise.
* gcc.target/aarch64/sve/clastb_4.c: Likewise.
* gcc.target/aarch64/sve/clastb_5.c: Likewise.
* gcc.target/aarch64/sve/clastb_6.c: Likewise.
* gcc.target/aarch64/sve/clastb_7.c: Likewise.

4 years agoRISC-V: Implement __builtin_thread_pointer
Kito Cheng [Tue, 7 Jul 2020 08:20:53 +0000 (16:20 +0800)]
RISC-V: Implement __builtin_thread_pointer

RISC-V has a dedicate register for thread pointer which is specified in psABI
doc, so we could support __builtin_thread_pointer in straightforward way.

Note: clang/llvm was supported __builtin_thread_pointer for RISC-V port
recently.
- https://reviews.llvm.org/rGaabc24acf0d5f8677bd22fe9c108581e07c3e180

gcc/ChangeLog:

* config/riscv/riscv.md (get_thread_pointer<mode>): New.
(TP_REGNUM): Ditto.
* doc/extend.texi (Target Builtins): Add RISC-V built-in section.
Document __builtin_thread_pointer.

gcc/testsuite/ChangeLog:

* gcc.target/riscv/read-thread-pointer.c: New.

4 years agoRISC-V: Disable remove unneeded save-restore call optimization if there are any argum...
Kito Cheng [Fri, 3 Jul 2020 05:49:51 +0000 (13:49 +0800)]
RISC-V: Disable remove unneeded save-restore call optimization if there are any arguments on stack.

 - This optimization will adjust stack, but it not check/update other
   stack pointer use-site, the example is when the arguments put on
   stack, the offset become wrong after optimization.

 - However adjust stack frame usage after register allocation could be
   error prone, so we decide to turn off this optimization for such case.

 - Ye-Ting Kuo report this issue on github:
   https://github.com/riscv/riscv-gcc/pull/192

gcc/ChangeLog:

* config/riscv/riscv-sr.c (riscv_remove_unneeded_save_restore_calls):
Abort if any arguments on stack.

gcc/testsuite/ChangeLog

* gcc.target/riscv/save-restore-9.c: New.

4 years agoDaily bump.
GCC Administrator [Thu, 9 Jul 2020 00:16:44 +0000 (00:16 +0000)]
Daily bump.

4 years agoMake memory copy functions scalar storage order barriers
Eric Botcazou [Wed, 8 Jul 2020 22:13:50 +0000 (00:13 +0200)]
Make memory copy functions scalar storage order barriers

This addresses the issue raised about the usage of memory copy functions
to toggle the scalar storage order.  Recall that you cannot (the compiler
errors out) take the address of a scalar which is stored in reverse order,
but you can do it for the enclosing aggregate type., which means that you
can also pass it to the memory copy functions.  In this case, the optimizer
may rewrite the copy into a scalar copy, which is a no-no.

gcc/c-family/ChangeLog:
* c.opt (Wscalar-storage-order): Add explicit variable.

gcc/c/ChangeLog:
* c-typeck.c (convert_for_assignment): If -Wscalar-storage-order is
set, warn for conversion between pointers that point to incompatible
scalar storage orders.

gcc/ChangeLog:
* gimple-fold.c (gimple_fold_builtin_memory_op): Do not fold if
either type has reverse scalar storage order.
* tree-ssa-sccvn.c (vn_reference_lookup_3): Do not propagate through
a memory copy if either type has reverse scalar storage order.

gcc/testsuite/ChangeLog:
* gcc.dg/sso-11.c: New test.
* gcc.dg/sso/sso.exp: Pass -Wno-scalar-storage-order.
* gcc.dg/sso/memcpy-1.c: New test.

4 years agoamdgcn, nvptx: Handle -fpic/-fPIC in mkoffload
Kwok Cheung Yeung [Mon, 6 Jul 2020 22:21:08 +0000 (15:21 -0700)]
amdgcn, nvptx: Handle -fpic/-fPIC in mkoffload

2020-07-08  Tobias Burnus  <tobias@codesourcery.com>

gcc/ChangeLog:

* config/gcn/mkoffload.c (compile_native, main): Pass -fPIC/-fpic
on to the native compiler, if used.
* config/nvptx/mkoffload.c (compile_native, main): Likewise.

4 years agoPR fortran/96085 - ICE in gfc_finish_var_decl, at fortran/trans-decl.c:694
Harald Anlauf [Wed, 8 Jul 2020 18:53:12 +0000 (20:53 +0200)]
PR fortran/96085 - ICE in gfc_finish_var_decl, at fortran/trans-decl.c:694

Legacy ASSIGN requires a scalar integer variable.  Reject parameter
arguments.

gcc/fortran/
PR fortran/96085
* resolve.c (gfc_resolve_code): Check whether assign target is a
parameter.

4 years agoUpdate gcc sv.po.
Joseph Myers [Wed, 8 Jul 2020 18:30:23 +0000 (18:30 +0000)]
Update gcc sv.po.

* sv.po: Update.

4 years agoc++: ICE in is_really_empty_class [PR95497]
Patrick Palka [Wed, 8 Jul 2020 18:17:47 +0000 (14:17 -0400)]
c++: ICE in is_really_empty_class [PR95497]

We are ICEing in the testcase below because we pass the
yet-uninstantiated class type A<int> of the PARM_DECL b to
is_really_empty_class from is_rvalue_constant_expression when parsing
the requirement t += b.

This patch fixes the ICE by guarding the problematic call to
is_really_empty_class with a COMPLETE_TYPE_P check, which should also
subsume the existing dependent_type_p check.

gcc/cp/ChangeLog:

PR c++/95497
* constexpr.c (potential_constant_expression_1) <case PARM_DECL>:
When processing_template_decl, check COMPLETE_TYPE_P before
calling is_really_empty_class.  Don't check dependent_type_p.

gcc/testsuite/ChangeLog:

PR c++/95497
* g++.dg/cpp2a/concepts-pr95497.C: New test.

4 years ago[PATCH, rs6000]Add support to enable vmsumudm behind vec_msum builtin.
Will Schmidt [Thu, 18 Jun 2020 20:14:00 +0000 (15:14 -0500)]
[PATCH, rs6000]Add support to enable vmsumudm behind vec_msum builtin.

gcc/ChangeLog:

2020-07-08  Will Schmidt  <will_schmidt@vnet.ibm.com>

* config/rs6000/altivec.h (vec_vmsumudm): New define.
* config/rs6000/altivec.md (UNSPEC_VMSUMUDM): New unspec.
  (altivec_vmsumudm): New define_insn.
* config/rs6000/rs6000-builtin.def (altivec_vmsumudm): New BU_ALTIVEC_3
  entry. (vmsumudm): New BU_ALTIVEC_OVERLOAD_3 entry.
* config/rs6000/rs6000-call.c (altivec_overloaded_builtins): Add entries for
  ALTIVEC_BUILTIN_VMSUMUDM variants of vec_msum.
* doc/extend.texi: Add document for vmsumudm behind vmsum.

gcc/testsuite/ChangeLog:

2020-07-08  Will Schmidt  <will_schmidt@vnet.ibm.com>

* gcc.target/powerpc/builtins-msum-runnable.c: New test.
* gcc.target/powerpc/vsx-builtin-msum.c: New test.

4 years agocompute and check alignment info during analysis
Richard Biener [Wed, 8 Jul 2020 11:50:51 +0000 (13:50 +0200)]
compute and check alignment info during analysis

This moves querying the alignment support scheme from load/store
transform time to get_load_store_type where we should know best
what alignment constraints we actually need.  This should make
verify_data_ref_alignment obsolete which prematurely disqualifies
all vectorization IMHO.

2020-07-08  Richard Biener  <rguenther@suse.de>

* tree-vect-stmts.c (get_group_load_store_type): Pass
in the SLP node and the alignment support scheme output.
Set that.
(get_load_store_type): Likewise.
(vectorizable_store): Adjust.
(vectorizable_load): Likewise.

4 years ago[Ada] Disable warning about unsafe use of __builtin_frame_address
Eric Botcazou [Mon, 25 May 2020 08:53:00 +0000 (10:53 +0200)]
[Ada] Disable warning about unsafe use of __builtin_frame_address

gcc/ada/

* tracebak.c [generic implementation]: Add pragma GCC diagnostic
to disable warning about __builtin_frame_address.

4 years ago[Ada] Fix C miss parentheses warning on Windows
Dmitriy Anisimkov [Sun, 24 May 2020 18:57:12 +0000 (00:57 +0600)]
[Ada] Fix C miss parentheses warning on Windows

gcc/ada/

* socket.c [_WIN32] (__gnat_minus_500ms): Parentheses around &&
operations.  Remove notes about TN in comment.

4 years ago[Ada] Fix warnings in C runtime files on Windows
Eric Botcazou [Sun, 24 May 2020 13:13:05 +0000 (15:13 +0200)]
[Ada] Fix warnings in C runtime files on Windows

gcc/ada/

* adaint.h (__gnat_expect_portable_execvp): Fix prototype.
(__gnat_expect_poll): Likewise.
* expect.c [_WIN32]: Include adaint.h file.
(__gnat_waitpid): Remove useless variable.
(__gnat_expect_portable_execvp): Add ATTRIBUTE_UNUSED on parameter.
* raise-gcc.c [SEH] (__gnat_personality_v0): Add ATTRIBUTE_UNUSED.
* socket.c [_WIN32] (__gnat_getservbyport): Add ATTRIBUTE_UNUSED on
a couple of parameters.
(__gnat_gethostbyname): Likewise.
(__gnat_gethostbyaddr): Likewise.
(__gnat_getservbyname): Likewise.
(__gnat_last_socket_in_set): Use variables local to loops.
(__gnat_socket_ioctl): Cast 3rd parameter to proper type if _WIN32.
(__gnat_inet_pton): Cast 2nd parameter to proper type if _WIN32.
* sysdep.c (__gnat_localtime_tzoff): Remove superfluous test.
* terminals.c [_WIN32]: Include io.h file.
(is_gui_app): Remove useless variables and fix unsigned comparison.
(nt_spawnve): Add ATTRIBUTE_UNUSED on first parameter.  Initialize a
local variable and remove others that are useless.  Add missing cast
(__gnat_setup_child_communication): Remove useless variable and call
Use proper formatting string in call to sprintf.
(__gnat_setup_parent_communication): Cast to proper type.
(find_child_console): Fix prototype and remove useless variable.
(find_process_handle): Likewise.
(_gnat_interrupt_process): Move to after __gnat_interrupt_pid.
(__gnat_reset_tty): Add ATTRIBUTE_UNUSED on parameter, remove return
(__gnat_setup_winsize): Add ATTRIBUTE_UNUSED on all parameters.

4 years ago[Ada] Do not apply constraint checks on allocator with No_Initialization
Eric Botcazou [Sun, 24 May 2020 13:23:42 +0000 (15:23 +0200)]
[Ada] Do not apply constraint checks on allocator with No_Initialization

gcc/ada/

* exp_ch4.adb (Expand_N_Allocator): In the subtype mark case, do
not apply constraint checks if the No_Initialization flag is set.

4 years ago[Ada] Fix recent regression on _Master declaration
Javier Miranda [Fri, 22 May 2020 19:29:57 +0000 (15:29 -0400)]
[Ada] Fix recent regression on _Master declaration

gcc/ada/

* exp_ch9.adb
(Build_Class_Wide_Master): Insert the declaration of _Master
before its use; required to avoid assertion failure in the
backend.

4 years ago[Ada] Clean up in Interfaces.C.Extensions
Arnaud Charlet [Fri, 22 May 2020 12:21:46 +0000 (08:21 -0400)]
[Ada] Clean up in Interfaces.C.Extensions

gcc/ada/

* libgnat/i-cexten.ads (long_long, unsigned_long_long): Now
subtypes of Interfaces.C types.
* libgnat/a-calcon.ads, libgnat/a-calcon.adb
(To_Unix_Nano_Time): Use Interfaces.C.long_long instead of
Interfaces.C.Extensions.long_long.

4 years ago[Ada] Optional warning on build-in-place function calls
Vasiliy Fofanov [Fri, 22 May 2020 11:22:41 +0000 (13:22 +0200)]
[Ada] Optional warning on build-in-place function calls

gcc/ada/

* debug.adb: Document new switch.
* exp_ch6.adb (Warn_BIP): New function that warns if the switch
is on.  Call it from Make_Build_In_Place_* functions.  Warn_BIP
is not needed in Make_Build_In_Place_Iface_*, because those call
Make_Build_In_Place_Call_In_Object_Declaration or similar.

4 years ago[Ada] Fix typo and layout in comments about matching
Piotr Trojanek [Fri, 22 May 2020 11:56:06 +0000 (13:56 +0200)]
[Ada] Fix typo and layout in comments about matching

gcc/ada/

* erroutc.adb (Matches): Fix comments.

4 years ago[Ada] Fix internal error on string type comparision with predicate
Eric Botcazou [Thu, 21 May 2020 23:37:00 +0000 (01:37 +0200)]
[Ada] Fix internal error on string type comparision with predicate

gcc/ada/

* freeze.adb (Has_Decl_In_List): New predicate to check that an
entity is declared in a list of nodes.
(Freeze_Expression): Use it to deal with Expression_With_Actions,
short-circuit expression, if- and case-expression and ensure that
the freeze node is put onto their Actions list if the entity is
declared locally.

4 years ago[Ada] Fix incorrect placement of freeze node with predicate
Eric Botcazou [Wed, 20 May 2020 22:58:06 +0000 (00:58 +0200)]
[Ada] Fix incorrect placement of freeze node with predicate

gcc/ada/

* freeze.adb (In_Expanded_Body): Return true for the body of a
generated predicate function.

4 years ago[Ada] Minor reformatting and typo fix
Gary Dismukes [Wed, 20 May 2020 17:44:34 +0000 (13:44 -0400)]
[Ada] Minor reformatting and typo fix

gcc/ada/

* sem_attr.adb: Remove hyphens in comments, plus minor code
reformatting.
* sem_ch13.adb: Fix typo (that => than).
* sem_util.adb: Add hyphen in comment ("class-wide").

4 years ago[Ada] Add comment on implementation choice for byte-packed array types
Eric Botcazou [Wed, 20 May 2020 08:13:05 +0000 (10:13 +0200)]
[Ada] Add comment on implementation choice for byte-packed array types

gcc/ada/

* freeze.adb (Freeze_Array_Type): Add comment on implementation
choice for byte-packed array types.

4 years ago[Ada] Accept aspect Relaxed_Initialization on generic subprograms
Piotr Trojanek [Fri, 15 May 2020 13:11:18 +0000 (15:11 +0200)]
[Ada] Accept aspect Relaxed_Initialization on generic subprograms

gcc/ada/

* sem_attr.adb (Analyze_Attribute): Correct prefix of 'Result
this prefix is a generic function but the enclosing aspect or
pragma is attached to its instance.
* sem_ch12.adb (Analyze_Generic_Subprogram_Declaration): Analyze
generic subprogram formal parameters (including the implicit
result of a generic function) and only then analyse its aspects,
because with Relaxed_Initialization the aspect expression might
refer to those formal parameters.
* sem_ch13.adb (Analyze_Aspect_Relaxed_Initialization): Accept
aspect on generic subprograms; install formal parameters of a
generic subprogram but not formal parameters of the generic unit
itself (the previous code was inspired by aspects Post and
Depends, where both kinds of formals are allowed).
* sem_util.ads (Enter_Name): Fix name of a subprogram referenced
in comment.

4 years ago[Ada] Analyze aspects once generic subprograms are recognized
Piotr Trojanek [Thu, 14 May 2020 10:11:52 +0000 (12:11 +0200)]
[Ada] Analyze aspects once generic subprograms are recognized

gcc/ada/

* sem_ch12.adb (Analyze_Generic_Subprogram_Declaration): Call
Analyze_Aspect_Specifications after setting Ekind of the
analyzed entity.
* sem_ch13.adb (Analyze_Aspect_Yield): Remove minimal decoration
of generic subprograms.

4 years ago[Ada] ACATS 4.1R - BD10001 - Error missed
Arnaud Charlet [Mon, 18 May 2020 10:00:31 +0000 (06:00 -0400)]
[Ada] ACATS 4.1R - BD10001 - Error missed

gcc/ada/

* sem_prag.adb (Process_Inline): Check for duplicate
pragma+aspect Inline. Minor code cleanup.
(Check_Duplicate_Pragma): Add warning for duplicate
pragma [No_]Inline under -gnatwr.
* sinfo.ads, sinfo.adb (Next_Rep_Item): Allow N_Null_Statement
which can appear when a pragma is rewritten.
* sem_util.ads, sem_util.adb, bindo-writers.adb: Fix bad
copy/paste now flagged.
* libgnat/s-mmap.ads: Remove redundant pragma Inline.

4 years ago[Ada] Update entities on class-wide condition function creation
Ed Schonberg [Mon, 18 May 2020 09:25:32 +0000 (11:25 +0200)]
[Ada] Update entities on class-wide condition function creation

gcc/ada/

* sem_util.adb (Build_Class_Wide_Clone_Body): Update entities to
refer to the right spec.

4 years ago[Ada] Disallow Predicate_Failure without predicate
Bob Duff [Tue, 19 May 2020 13:23:21 +0000 (09:23 -0400)]
[Ada] Disallow Predicate_Failure without predicate

gcc/ada/

* sem_ch13.adb (Predicate_Failure): Check that the type has
predicates.  Remove the setting of Has_Delayed_Aspects and
Freeze_Node, because (if the code is legal) it should have
already been done by the predicate aspect.

4 years ago[Ada] Typo corrections, plus minor reformatting in comments
Gary Dismukes [Tue, 19 May 2020 18:30:05 +0000 (14:30 -0400)]
[Ada] Typo corrections, plus minor reformatting in comments

gcc/ada/

* par-ch4.adb (P_Iterated_Component_Association): Typo
corrections.

4 years ago[Ada] Ada_2020 AI12-0250 : Implement Iterator filters.
Ed Schonberg [Mon, 18 May 2020 01:02:59 +0000 (21:02 -0400)]
[Ada] Ada_2020 AI12-0250 : Implement Iterator filters.

gcc/ada/

* par.adb (P_Iterator_Specification): Make public for use in
other parser subprograms.
* par-ch4.adb (P_Iterated_Component_Association): In Ada_2020,
recognize use of Iterator_Specification in an element iterator.
To simplify disambiguation between the two iterator forms, mark
the component association as carrying an Iterator_Specification
only when the element iterator (using "OF") is used.
* par-ch5.adb (P_Loop_Parameter_Specification): In Ada_2020,
parse iterator filter when present.
(P_Iterator_Specification): Ditto.  Remove declaration of
P_Iterator_Specification, now in parent unit.
* exp_ch5.adb (Expand_N_Loop_Statement): Apply Iterator filter
when present.
(Expand_Iterator_Loop_Over_Array): Ditto.
(Expand_Iterator_Loop_Over_Container): Ditto.
* sem_aggr.adb (Resolve_Array_Aggregate): Emit error nessage if
an iterated component association includes a iterator
specificcation with an element iterator, i.e. one that uses the
OF keyword.
* sem_ch5.adb (Analyze_Iterator_Specification): Analyze Iterator
filter when present.
(Analyze_Loop_Parameter_Specification): Ditto.
* sinfo.adb: Suprogram bodies for new syntactic element
Iterator_Filter.
* sinfo.ads: Add Iterator_Filter to relevant nodes.  Structure
of Component_Association and Iteroted_Component_Association
nodes is modified to take into account the possible  presence of
an iterator specification in the latter.

4 years ago[Ada] Add utility function to recognize attribute 'Loop_Entry
Yannick Moy [Tue, 19 May 2020 14:11:28 +0000 (16:11 +0200)]
[Ada] Add utility function to recognize attribute 'Loop_Entry

gcc/ada/

* sem_util.ads, sem_util.adb (Is_Attribute_Loop_Entry): New
function for GNATProve.

4 years ago[Ada] Add expected and actual size to "bit number out of range" error message
Ghjuvan Lacambre [Mon, 18 May 2020 13:41:09 +0000 (15:41 +0200)]
[Ada] Add expected and actual size to "bit number out of range" error message

gcc/ada/

* sem_ch13.adb (Analyze_Record_Representation_Clause,
Check_Record_Representation_Clause): Add expected and actual
size to error message.

4 years ago[Ada] Remove excessive validity checks on in-parameters
Piotr Trojanek [Mon, 18 May 2020 19:41:12 +0000 (21:41 +0200)]
[Ada] Remove excessive validity checks on in-parameters

gcc/ada/

* sem_util.ads, sem_util.adb (Safe_To_Capture_Value): Return
True for in-parameters.

4 years ago[Ada] Minor refactoring
Justin Squirek [Mon, 6 Apr 2020 11:53:12 +0000 (07:53 -0400)]
[Ada] Minor refactoring

gcc/ada/

* exp_attr.adb (Expand_Attribute): Set
Stores_Attribute_Old_Prefix to generated renamings of 'Old
constants for later use in generating finalization routines.
* exp_ch7.adb (Build_Finalizer): Minor reformatting. Use "or
else" operators.

4 years ago[Ada] Static expression function problems with -gnatc and -gnatd.F (SPARK mode)
Gary Dismukes [Sun, 17 May 2020 21:57:05 +0000 (17:57 -0400)]
[Ada] Static expression function problems with -gnatc and -gnatd.F (SPARK mode)

gcc/ada/

* exp_ch6.adb (Expand_Simple_Function_Return): Remove ugly code
that was copying the return expression, resetting Analyzed
flags, etc. for the return expression of static expression
functions.
* inline.adb (Inline_Static_Expression_Function_Call): Set the
Parent of the copied expression to that of the call. This avoids
a blowup in Insert_Actions when GNATprove_Mode is set and there
are nested SEF calls. Add ??? comment.
* sem_ch6.adb (Analyze_Expression_Function): In the case of a
static expression function, create a new copy of the expression
and replace the function's expression with the copy; the
original expression is used in the expression function's body
and will be analyzed and rewritten, and we need to save a clean
copy for later use in processing static calls to the function.
This allows removing the kludgy code that was in
Expand_Simple_Function_Return.
* sem_eval.adb (Eval_Qualified_Expression): Return immediately
if any errors have been posted on the qualified expression, to
avoid blowups when GNATprove_Mode is enabled (or with -gnatd.F),
since illegal static expressions are handled differently in that
case and attempting to fold such expressions would fail.

4 years ago[Ada] Fix inaccurate -gnatR output for derived untagged types
Eric Botcazou [Mon, 18 May 2020 20:36:49 +0000 (22:36 +0200)]
[Ada] Fix inaccurate -gnatR output for derived untagged types

gcc/ada/

* repinfo.adb (Compute_Max_Length): Skip hidden discriminants.
(List_Record_Layout): Likewise.
(List_Structural_Record_Layout): Use First_Discriminant instead
of First_Stored_Discriminant and Next_Discriminant instead of
Next_Stored_Discriminant to walk the list of discriminants.

4 years ago[Ada] Allow boolean expressions in aspect Relaxed_Initialization
Piotr Trojanek [Mon, 18 May 2020 16:46:49 +0000 (18:46 +0200)]
[Ada] Allow boolean expressions in aspect Relaxed_Initialization

gcc/ada/

* sem_ch13.adb (Analyze_Aspect_Relaxed_Initialization): Analyze
optional boolean expressions.
* sem_util.ads, sem_util.adb (Has_Relaxed_Initialization): Adapt
query; update comment.

4 years ago[Ada] Style cleanups related to Current_Condition
Piotr Trojanek [Fri, 15 May 2020 18:40:03 +0000 (20:40 +0200)]
[Ada] Style cleanups related to Current_Condition

gcc/ada/

* einfo.ads (Current_Value): Fix typo in comment.
* exp_ch2.adb (Expand_Current_Value): Remove unnecessary "Start
of processing ..." comment.
* exp_util.adb (Set_Entity_Current_Value): Fix unbalanced paren
in comment.
(Get_Current_Value_Condition): Fix layout in comment.
* sem_ch5.adb (Analyze_Cond_Then): Replace commented condition
with pragma Assert.

4 years ago[Ada] Extend optimization to True/False prefixed with Standard
Piotr Trojanek [Fri, 15 May 2020 18:27:18 +0000 (20:27 +0200)]
[Ada] Extend optimization to True/False prefixed with Standard

gcc/ada/

* exp_ch5.adb (Expand_N_If_Statement): Detect True/False
prefixed with Standard.

4 years ago[Ada] Check predicates for subtypes of private types
Bob Duff [Sat, 16 May 2020 15:59:50 +0000 (11:59 -0400)]
[Ada] Check predicates for subtypes of private types

gcc/ada/

* sem_ch13.adb (Analyze_Aspect_Specifications): Add freeze node
for the Underlying_Full_View if it exists. The freeze node is
what triggers the generation of the predicate function.
* freeze.adb: Minor reformatting.

4 years ago[Ada] Small tweak to Narrow_Large_Operation procedure
Eric Botcazou [Sat, 16 May 2020 13:42:04 +0000 (15:42 +0200)]
[Ada] Small tweak to Narrow_Large_Operation procedure

gcc/ada/

* exp_ch4.adb (Narrow_Large_Operation): Use the base type instead
of the first subtype of standard integer types as narrower type.

4 years agoexpr: Fix REDUCE_BIT_FIELD for constants [PR95694]
Richard Sandiford [Wed, 8 Jul 2020 14:01:14 +0000 (15:01 +0100)]
expr: Fix REDUCE_BIT_FIELD for constants [PR95694]

This is yet another PR caused by constant integer rtxes not storing
a mode.  We were calling REDUCE_BIT_FIELD on a constant integer that
didn't fit in poly_int64, and then tripped the as_a<scalar_int_mode>
assert on VOIDmode.

AFAICT REDUCE_BIT_FIELD is always passed rtxes that have TYPE_MODE
(rather than some other mode) and it just fills in the redundant
sign bits of that TYPE_MODE value.  So it should be safe to get
the mode from the type instead of the rtx.  The patch does that
and asserts that the modes agree, where information is available.

That on its own is enough to fix the bug, but we might as well
extend the folding case to all constant integers, not just those
that fit poly_int64.

gcc/
PR middle-end/95694
* expr.c (expand_expr_real_2): Get the mode from the type rather
than the rtx, and assert that it is consistent with the mode of
the rtx (where known).  Optimize all constant integers, not just
those that can be represented in poly_int64.

gcc/testsuite/
PR middle-end/95694
* gcc.dg/pr95694.c: New test.

4 years agoc++: Better diagnostic for decltype(auto) in C++11 [PR96103]
Marek Polacek [Tue, 7 Jul 2020 21:09:42 +0000 (17:09 -0400)]
c++: Better diagnostic for decltype(auto) in C++11 [PR96103]

If you try to use decltype(auto) in C++11, we emit obscure

  error: expected primary-expression before 'auto'

giving the user no hint as to what's wrong.  This patch improves that
diagnostic.  Since we've been giving an error, I'm also using error().

gcc/cp/ChangeLog:

PR c++/96103
* parser.c (cp_parser_decltype): Print error about using decltype(auto)
in C++11.  Check that the token following "auto" is ")".

gcc/testsuite/ChangeLog:

PR c++/96103
* g++.dg/cpp0x/decltype77.C: New test.

4 years agors6000: Add len_load/len_store optab support
Kewen Lin [Wed, 8 Jul 2020 07:44:02 +0000 (02:44 -0500)]
rs6000: Add len_load/len_store optab support

Define rs6000 specific len_load/len_store for the LEN_LOAD/LEN_STORE
internal function's expansion.  As the doc description of the
len_load/len_store optab shows, we should use V16QI to wrap those
available vector modes.

gcc/ChangeLog:

* config/rs6000/vsx.md (len_load_v16qi): New define_expand.
(len_store_v16qi): Likewise.