My recent patch to recognize reg starvation resulted in few GCC test
failures. The following patch fixes this by using more accurate
starvation calculation and ignoring small reg classes.
gcc/ChangeLog:
PR rtl-optimization/115013
* lra-constraints.cc (process_alt_operands): Update all_used_nregs
only for winreg. Ignore reg starvation for small reg classes.
Pan Li [Sat, 11 May 2024 07:25:28 +0000 (15:25 +0800)]
RISC-V: Bugfix ICE for RVV intrinisc vfw on _Float16 scalar
For the vfw vx format RVV intrinsic, the scalar type _Float16 also
requires the zvfh extension. Unfortunately, we only check the
vector tree type and miss the scalar _Float16 type checking. For
example:
It should report some error message like zvfh extension is required
instead of ICE for unreg insn.
This patch would like to make up such kind of validation for _Float16
in the RVV intrinsic API. It will report some error like below when
there is no zvfh enabled.
error: built-in function '__riscv_vfwsub_wf_f32mf2(vs2, rs1, vl)'
requires the zvfhmin or zvfh ISA extension
Passed the rv64gcv fully regression tests, included c/c++/fortran.
PR target/114988
gcc/ChangeLog:
* config/riscv/riscv-vector-builtins.cc
(validate_instance_type_required_extensions): New func impl to
validate the intrinisc func type ops.
(expand_builtin): Validate instance type before expand.
gcc/testsuite/ChangeLog:
* gcc.target/riscv/rvv/base/pr114988-1.c: New test.
* gcc.target/riscv/rvv/base/pr114988-2.c: New test.
During maybe_aggr_guide with a nested class template and paren init,
like with list init we need to consider the generic template type rather
than the partially instantiated type since partial instantiations don't
have (partially instantiated) TYPE_FIELDS. In turn we need to partially
substitute PARMs in the paren init case as well. As a drive-by improvement
it seems better to use outer_template_args instead of DECL_TI_ARGS during
this partial substitution so that we lower instead of substitute the
innermost template parameters, which is generally more robust.
And during alias_ctad_tweaks with a nested class template, even though
the guides may be already partially instantiated we still need to
substitute the outermost arguments into its constraints.
PR c++/114974
PR c++/114901
PR c++/114903
gcc/cp/ChangeLog:
* pt.cc (maybe_aggr_guide): Fix obtaining TYPE_FIELDS in
the paren init case. Hoist out partial substitution logic
to apply to the paren init case as well.
(alias_ctad_tweaks): Substitute outer template arguments into
a guide's constraints.
gcc/testsuite/ChangeLog:
* g++.dg/cpp2a/class-deduction-aggr14.C: New test.
* g++.dg/cpp2a/class-deduction-alias20.C: New test.
* g++.dg/cpp2a/class-deduction-alias21.C: New test.
Jeff Law [Mon, 13 May 2024 13:14:08 +0000 (07:14 -0600)]
[to-be-committed,RISC-V] Improve single inverted bit extraction - v3
So this patch fixes a minor code generation inefficiency that (IIRC) the
RAU team discovered a while ago in spec.
If we want the inverted value of a single bit we can use bext to extract
the bit, then seq to invert the value (if viewed as a 0/1 truth value).
The RTL is fairly convoluted, but it's basically a right shift to get
the bit into position, bitwise-not then masking off all but the low bit.
So it's a 3->2 combine, hidden by the fact that and-not is a
define_insn_and_split, so it actually looks like a 2->2 combine.
We've run this through Ventana's internal CI (which includes
zba_zbb_zbs) and I've run it in my own tester (rv64gc, rv32gcv). I'll
wait for the upstream CI to finish with positive results before pushing.
gcc/
* config/riscv/bitmanip.md (bextseqzdisi): New patterns.
gcc/testsuite/
* gcc.target/riscv/zbs-bext-2.c: New test.
* gcc.target/riscv/zbs-bext.c: Fix one of the possible expectes sequences.
Richard Biener [Thu, 9 Nov 2023 10:30:22 +0000 (11:30 +0100)]
PR60276 fix for single-lane SLP
When enabling single-lane SLP and not splitting groups the fix for
PR60276 is no longer effective since it for unknown reason exempted
pure SLP. The following removes this exemption, making
gcc.dg/vect/pr60276.c PASS even with --param vect-single-lane-slp=1
PR tree-optimization/60276
* tree-vect-stmts.cc (vectorizable_load): Do not exempt
pure_slp grouped loads from the STMT_VINFO_MIN_NEG_DIST
restriction.
PR libstdc++/114958
* include/experimental/bits/simd.h (__as_vector): Return scalar
simd as one-element vector. Return vector from single-vector
fixed_size simd.
(__vec_shuffle): New.
(__extract_part): Adjust return type signature.
(split): Use __extract_part for any split into non-fixed_size
simds.
(concat): If the return type stores a single vector, use
__vec_shuffle (which calls __builtin_shufflevector) to produce
the return value.
* include/experimental/bits/simd_builtin.h
(__shift_elements_right): Removed.
(__extract_part): Return single elements directly. Use
__vec_shuffle (which calls __builtin_shufflevector) to for all
non-trivial cases.
* include/experimental/bits/simd_fixed_size.h (__extract_part):
Return single elements directly.
* testsuite/experimental/simd/pr114958.cc: New test.
Richard Biener [Fri, 1 Mar 2024 11:08:36 +0000 (12:08 +0100)]
Refactor SLP reduction group discovery
The following refactors a bit how we perform SLP reduction group
discovery possibly making it easier to have multiple reduction
groups later, esp. with single-lane SLP.
* tree-vect-slp.cc (vect_analyze_slp_instance): Remove
slp_inst_kind_reduc_group handling.
(vect_analyze_slp): Add the meat here.
Jakub Jelinek [Mon, 13 May 2024 09:15:27 +0000 (11:15 +0200)]
tree-ssa-math-opts: Pattern recognize yet another .ADD_OVERFLOW pattern [PR113982]
We pattern recognize already many different patterns, and closest to the
requested one also
yc = (type) y;
zc = (type) z;
x = yc + zc;
w = (typeof_y) x;
if (x > max)
where y/z has the same unsigned type and type is a wider unsigned type
and max is maximum value of the narrower unsigned type.
But apparently people are creative in writing this in diffent ways,
this requests
yc = (type) y;
zc = (type) z;
x = yc + zc;
w = (typeof_y) x;
if (x >> narrower_type_bits)
The following patch implements that.
2024-05-13 Jakub Jelinek <jakub@redhat.com>
PR middle-end/113982
* tree-ssa-math-opts.cc (arith_overflow_check_p): Also return 1
for RSHIFT_EXPR by precision of maxval if shift result is only
used in a cast or comparison against zero.
(match_arith_overflow): Handle the RSHIFT_EXPR use case.
Piotr Trojanek [Fri, 2 Feb 2024 12:24:45 +0000 (13:24 +0100)]
ada: Revert recent change for Put_Image and Object_Size attributes
Recent change for attribute Object_Size caused spurious errors when
restriction No_Implementation_Attributes is active and attribute
Object_Size is introduced by expansion of dispatching operations.
Temporarily revert that change for a further investigation.
Eric Botcazou [Thu, 1 Feb 2024 14:30:28 +0000 (15:30 +0100)]
ada: Rename finalization scope masters into finalization masters
Now that what was previously called "finalization master" has been renamed
into "finalization collection" in the front-end, we can also rename what was
initially called "finalization scope master" into "finalization master".
These entities indeed drive the finalization of all the objects that require
it, directly for (statically) declared objects or indirectly for dynamically
allocated objects (that is to say, through finalization collections).
gcc/ada/
* exp_ch7.adb: Adjust the description of finalization management.
(Build_Finalizer): Rename scope master into master throughout.
* rtsfind.ads (RE_Id): Replace RE_Finalization_Scope_Master with
RE_Finalization_Master.
(RE_Unit_Table): Replace entry for RE_Finalization_Scope_Master with
entry for RE_Finalization_Master.
* libgnat/s-finpri.ads (Finalization_Scope_Master): Rename into...
(Finalization_Master): ...this.
(Attach_Object_To_Master): Adjust to above renaming.
(Chain_Node_To_Master): Likewise.
(Finalize_Master): Likewise.
* libgnat/s-finpri.adb (Attach_Object_To_Master): Likewise.
(Chain_Node_To_Master): Likewise.
(Finalize_Master): Likewise.
Eric Botcazou [Thu, 1 Feb 2024 13:38:47 +0000 (14:38 +0100)]
ada: Remove dynamic frame in System.Image_D and document it in System.Image_F
The former can easily be removed while the latter cannot.
gcc/ada/
* libgnat/s-imaged.ads (System.Image_D): Add Uns formal parameter.
* libgnat/s-imaged.adb: Add with clauses for System.Image_I,
System.Value_I_Spec and System.Value_U_Spec.
(Uns_Spec): New instance of System.Value_U_Spec.
(Int_Spec): New instance of System.Value_I_Spec.
(Image_I): New instance of System.Image_I.
(Set_Image_Integer): New renaming.
(Set_Image_Decimal): Replace 'Image with call to Set_Image_Integer.
* libgnat/s-imde32.ads (Uns32): New subtype.
(Impl): Pass Uns32 as second actual paramter to Image_D.
* libgnat/s-imde64.ads (Uns64): New subtype.
(Impl): Pass Uns64 as second actual paramter to Image_D.
* libgnat/s-imde128.ads (Uns128): New subtype.
(Impl): Pass Uns128 as second actual paramter to Image_D.
* libgnat/s-imagef.adb (Set_Image_Fixed): Document bounds for the
A, D and AF local constants.
Piotr Trojanek [Thu, 1 Feb 2024 12:15:27 +0000 (13:15 +0100)]
ada: Attributes Put_Image and Object_Size are defined by Ada 2022
Recognize references to attributes Put_Image and Object_Size as
language-defined in Ada 2022 and implementation-defined in earlier
versions of Ada. Other attributes listed in Ada 2022 RM, K.2 and
currently implemented in GNAT are correctly categorized.
This change only affects code with restriction
No_Implementation_Attributes.
Piotr Trojanek [Wed, 31 Jan 2024 14:32:22 +0000 (15:32 +0100)]
ada: Remove guards against traversal of empty list of aspects
When iterating over Aspect_Specifications, we can use First/Next
directly even if the Aspect_Specifications returns a No_List or
the list has no items.
Code cleanup.
gcc/ada/
* aspects.adb (Copy_Aspects): Style fix.
* contracts.adb (Analyze_Contracts): Style fix.
(Save_Global_References_In_Contract): Remove extra guards.
* par_sco.adb (Traverse_Aspects): Move guard to the caller and
make it consistent with Save_Global_References_In_Contract.
* sem_ch12.adb (Has_Contracts): Remove extra guards.
* sem_ch3.adb (Delayed_Aspect_Present, Get_Partial_View_Aspect,
Check_Duplicate_Aspects): Likewise.
* sem_disp.adb (Check_Dispatching_Operation): Likewise.
Bob Duff [Wed, 31 Jan 2024 14:30:06 +0000 (09:30 -0500)]
ada: Fix crash on Compile_Time_Warning in dead code
If a pragma Compile_Time_Warning triggers, and the pragma
is later removed because it is dead code, then the compiler
can return a bad exit code. This causes gprbuild to report
"*** compilation phase failed".
This is because Total_Errors_Detected, which is declared as Nat,
goes negative, causing Constraint_Error. In assertions-off mode,
the Constraint_Error is not detected, but the compiler nonetheless
reports a bad exit code.
This patch prevents that negative count.
gcc/ada/
* errout.adb (Output_Messages): Protect against the total going
negative.
Piotr Trojanek [Tue, 30 Jan 2024 15:12:16 +0000 (16:12 +0100)]
ada: Move splitting of pre/post aspect expressions to expansion
We split expressions of pre/post aspects into individual conjuncts and
emit messages with their precise location when they fail at runtime.
This was done when processing the aspects and caused inefficiency when
the original expression had to be recovered to detects uses of 'Old that
changed in Ada 2022. This patch moves splitting to expansion.
Conceptually, splitting in expansion is easy, but we need to take care
of locations for inherited pre/post contracts. Previously the location
string was generated while splitting the aspect into pragmas and then
it was manipulated when inheriting the pragmas. Now the location string
is built when installing the Pre'Class check and when splitting the
expression in expansion.
gcc/ada/
* exp_ch6.adb (Append_Message): Build the location string from
scratch and not rely on the one produced while splitting the
aspect into pragmas.
* exp_prag.adb (Expand_Pragma_Check): Split pre/post checks in
expansion.
* sem_ch13.adb (Analyze_Aspect_Specification): Don't split
pre/post expressions into conjuncts; don't add message with
location to the corresponding pragma.
* sem_prag.adb (Build_Pragma_Check_Equivalent): Inherited
pragmas no longer have messages that would need to be updated.
* sinput.adb (Build_Location_String): Adjust to keep previous
messages while using with inherited pragmas.
Piotr Trojanek [Fri, 26 Jan 2024 17:25:09 +0000 (18:25 +0100)]
ada: Deconstruct unused flag Is_Expanded_Contract
Flag Is_Expanded_Contract was introduced together with N_Contract field
(when implementing freezing of contracts), but was never actually used.
gcc/ada/
* gen_il-fields.ads (Opt_Field_Enum):
Remove Is_Expanded_Contract from the list of flags.
* gen_il-gen-gen_nodes.adb (N_Contract): Remove
Is_Expanded_Contract from the list of N_Contract fields.
* sinfo.ads (Is_Expanded_Contract): Remove comments for the flag
and its single occurrence in N_Contract.
Piotr Trojanek [Thu, 25 Jan 2024 18:09:01 +0000 (19:09 +0100)]
ada: Complete implementation of Ada 2022 aspect Exclusive_Functions
Extend implementation of RM 9.5.1(7/4), which now applies also to
protected function if the protected type has aspect Exclusive_Functions.
gcc/ada/
* exp_ch9.adb (Build_Protected_Subprogram_Call_Cleanup): If
aspect Exclusive_Functions is present then the cleanup of a
protected function now services queued entries, just like the
cleanup of a protected procedure.
This patch rewrites Append_Entity_Name, both for maintainability and to
improve user messages. The main issue was that the recursion stopped
when the enclosing scope is the wrapper created in case of
postconditions with 'Old. This caused different results depending
on the enabling/disabling of assertions. Instead of stopping,
we now skip things that the user shouldn't see; there is useful
information in more-outer scope names.
Simplify the code. We had a nested procedure, which called itself
recursively, and also was mutually recursive with the outer procedure.
Avoid testing Is_Internal_Name of the Chars, which seems too fragile.
'R' is used for subprogram instances, but for example "SR" is used for
TSS_Stream_Read, so removing 'R' works only by accident.
Instead, base the test for subprogram instances on normal Einfo
queries.
The new version of Append_Entity_Name produces different (and better)
results in many cases, but this fact is not apparent in most test cases,
because they don't raise unhandled exceptions or do other things that
involve printing the entity name.
The comment:
-- Otherwise nothing to output (happens in unnamed block statements)
is removed; there are many cases other than block statements that
reached that part of the code.
gcc/ada/
* sem_util.ads (Append_Entity_Name): Fix comment to reflect new
semantics. The comment said, "The qualification stops at an
enclosing scope has no source name (block or loop)." There seems
to be no reason for stopping; instead, we should SKIP things with
no source name. And the "loop" part was wrong.
* sem_util.adb (Append_Entity_Name): Do not stop the recursion;
skip to next-outer scope instead. Misc cleanup/simplification.
Eric Botcazou [Thu, 25 Jan 2024 11:47:43 +0000 (12:47 +0100)]
ada: Couple of comment tweaks to latest change
This replaces a few remaining references to "master" by "collection" and
makes a couple of additional tweaks in comments.
gcc/ada/
* libgnat/s-finpri.adb (Finalize): Replace "master" by "collection"
in comments and add a comment about the form of the loop.
* libgnat/s-stposu.adb (Allocate_Any_Controlled): Tweak comment.
Eric Botcazou [Tue, 23 Jan 2024 11:54:52 +0000 (12:54 +0100)]
ada: Replace finalization masters with finalization collections
This change replaces finalization masters with finalization collections in
most cases, that is to say, when they implement a list of objects created
by allocators of a given access type; indeed the moniker is overloaded in
the front-end, e.g. Sem_Util.Is_Master determines if a node "constitutes
a finalization master" but is not affected by the change.
This is mostly a renaming at this stage, toward something more in keeping
with the terminology used in the RM 7.6.1 clause and no functional changes:
although it gets rid of the rest of the System.Finalization_Masters unit,
the functionalities are reimplemented in the System.Finalization_Primitives
unit in terms of collections with only minor adjustments.
gcc/ada/
* Makefile.rtl (GNATRTL_NONTASKING_OBJS): Remove s-finmas$(objext).
* einfo.ads (Anonymous_Masters): Rename into Anonymous_Collections.
(Finalization_Master): Rename into Finalization_Collection.
* gen_il-fields.ads (Opt_Field_Enum): Replace Anonymous_Masters
with Anonymous_Collections; and Finalization_Master with
Finalization_Collection.
* gen_il-gen-gen_entities.adb (Access_Kind): Likewise.
(E_Function): Likewise.
(E_Procedure): Likewise.
(E_Package): Likewise.
(E_Subprogram_Body): Likewise.
* exp_ch3.adb (Build_Heap_Or_Pool_Allocator): Adjust to renamings.
(Freeze_Type): Likewise.
(Stream_Operation_OK): Remove obsolete test.
* exp_ch4.adb (Expand_Allocator_Expression): Adjust to renamings.
(Expand_N_Allocator): Likewise.
* exp_ch6.ads (BIP_Formal_Kind): Replace BIP_Finalization_Master
with BIP_Collection.
(Needs_BIP_Finalization_Master): Rename into...
(Needs_BIP_Collection): ...this.
* exp_ch6.adb (BIP_Finalization_Master_Suffix): Delete.
(BIP_Collection_Suffix): New constant string.
(Add_Finalization_Master_Actual_To_Build_In_Place_Call): Rename to
(Add_Collection_Actual_To_Build_In_Place_Call): ...this and adjust.
(BIP_Formal_Suffix): Replace BIP_Finalization_Master alternative
with BIP_Collection alternative.
(BIP_Suffix_Kind): Replace test on BIP_Finalization_Master_Suffix
with test on BIP_Collection_Suffix.
(Is_Build_In_Place_Entity): Likewise.
(Make_Build_In_Place_Call_In_Allocator): Call Needs_BIP_Collection
and Add_Collection_Actual_To_Build_In_Place_Call.
(Make_Build_In_Place_Call_In_Anonymous_Context): Likewise.
(Make_Build_In_Place_Call_In_Assignment): Likewise.
(Make_Build_In_Place_Call_In_Object_Declaration): Likewise.
(Needs_BIP_Finalization_Master): Rename into...
(Needs_BIP_Collection): ...this.
(Needs_BIP_Alloc_Form): Call Needs_BIP_Collection.
* exp_ch7.ads (Build_Anonymous_Master): Rename into...
(Build_Anonymous_Collection): ...this.
(Build_Finalization_Master): Rename into...
(Build_Finalization_Collection): ...this.
* exp_ch7.adb (Allows_Finalization_Master): Rename into...
(Allows_Finalization_Collection): ...this.
(Build_BIP_Cleanup_Stmts): Adjust to renamings.
(Build_Anonymous_Master): Rename into...
(Build_Anonymous_Collection): ...this. Adjust to renamings.
(Build_Finalization_Master): Rename into...
(Build_Finalization_Collection): ...this. Adjust to renamings.
(Build_Finalizer): Adjust comment to renamings.
* exp_ch13.adb (Expand_N_Free_Statement): Adjust to renamings.
* exp_util.adb (Build_Allocate_Deallocate_Proc): Likewise.
(Requires_Cleanup_Actions): Adjust comment to renamings.
* freeze.adb (Freeze_All): Likewise.
* rtsfind.ads (RTU_Id): Remove System_Finalization_Masters.
(RE_Id): Remove RE_Finalization_Master & RE_Finalization_Master_Ptr
add RE_Finalization_Collection & RE_Finalization_Collection_Ptr.
Adjust RE_Add_Offset_To_Address and RE_Finalization_Scope_Master.
(RE_Unit_Table): Remove entries for RE_Finalization_Master &
RE_Finalization_Master_Ptr, add ones for RE_Finalization_Collection
& RE_Finalization_Collection_Ptr. Also adjust those of
RE_Add_Offset_To_Address and RE_Finalization_Scope_Master.
* sem_ch3.adb (Access_Type_Declaration): Adjust to renamings.
* sem_ch6.adb (Create_Extra_Formals): Likewise.
* sem_util.adb (Designated_Subtype_Mark): Likewise.
* libgnat/s-finpri.ads: Add clauses for Ada.Finalization and
System.Storage_Elements.
(Finalization_Collection): New limited controlled type.
(Finalization_Collection_Ptr): Likewise.
(Initialize): New overriding procedure.
(Finalize): Likewise.
(Finalization_Started): Likewise.
(Collection_Node): New type.
(Collection_Node_Ptr): Likewise.
(Attach_Node_To_Collection): New procedure.
(Detach_Node_From_Collection): Likewise.
(Header_Size): New function.
(Add_Offset_To_Address): Likewise.
* libgnat/s-finpri.adb (Add_Offset_To_Address): New function.
(Attach_Node_To_Collection): New procedure.
(Detach_Node_From_Collection): Likewise.
(Finalization_Started): Likewise.
(Finalize): New overriding procedure.
(Header_Size): New function.
(Initialize): New overriding procedure.
* libgnat/s-spsufi.ads (Finalize_And_Deallocate): Adjust comment.
* libgnat/s-spsufi.adb: Remove clause for Finalization_Masters and
add clause for Finalization_Primitives.
(Finalize_And_Deallocate): Finalize the Collection component.
* libgnat/s-stposu.ads: Remove clause for Finalization_Masters and
add clause for Finalization_Primitives.
(Root_Subpool): Replace Master component with Collection.
(Allocate_Any_Controlled): Replace Context_Master parameter with
Context_Collection parameter.
* libgnat/s-stposu.adb: Remove clauses for Finalization_Masters and
add clauses for Finalization_Primitives.
(Address_To_FM_Node_Ptr): Delete.
(To_Collection_Node_Ptr): New instance of Ada.Unchecked_Conversion.
(Adjust_Controlled_Dereference): Adjust comment to renamings.
(Allocate_Any_Controlled): Replace Context_Master parameter with
Context_Collection parameter. Adjust to renamings.
(Deallocate_Any_Controlled): Adjust to renamings.
(Print_Subpool): Likewise.
* libgnat/s-finmas.ads: Delete.
* libgnat/s-finmas.adb: Likewise.
Ashley Gay [Fri, 17 Nov 2023 10:50:03 +0000 (11:50 +0100)]
ada: Remove deprecated VxWorks interrupt connection API
The VxWorks 7 API to use hardware interrupts is the VxBus subsystem.
GNAT API still provides bindings for the deprecated (VxWorks 6) routines.
A direct consequence of this change is that Attach_Handler cannot be
used anymore (the VxBus subsystem should be used instead).
This patch removes all the functions that are not supported by VxWorks 7
anymore.
To warn for the usage of Attach_Handler, it adds the 'Obsolescent'
pragma to to this routine so the comiler will advise the user if this
function is called directly or through a pragma.
gcc/ada/
* Makefile.rtl: remove i-vxinco.* from the build
* doc/gnat_rm/the_gnat_library.rst: Remove i-vxinco.ads from
the units documentation.
* impunit.adb: Remove i-vxinco from the list of available units
in GNATstudio.
* libgnarl/i-vxinco.adb: Remove.
* libgnarl/i-vxinco.ads: Ditto.
* libgnarl/s-interr__vxworks.adb: enrich comment
* libgnarl/s-vxwext__kernel.ads: fix comment
* libgnat/i-vxwork.ads: Remove deprecated interrupt connections
API, as well as an example.
* libgnat/i-vxwork__x86.ads: Ditto and add the paragma
Obscolescent to Attach_Handler
* gnat_rm.texi: Regenerate.
Eric Botcazou [Tue, 23 Jan 2024 07:44:38 +0000 (08:44 +0100)]
ada: Decouple finalization masters from storage pools
The coupling came from the build-in-place protocol but is now unnecessary
because the storage pool reference is always passed along with the master
reference in this protocol. No functional changes.
gcc/ada/
* exp_ch3.adb (Build_Heap_Or_Pool_Allocator): Use the BIPstoragepool
formal parameter to retrieve the pool in the presence of a master.
* exp_ch6.adb (Make_Build_In_Place_Call_In_Allocator): Always pass
a pool reference along with the master reference.
(Make_Build_In_Place_Call_In_Object_Declaration): Likewise.
* exp_ch7.adb (Build_BIP_Cleanup_Stmts): Use the BIPstoragepool
formal parameter to retrieve the pool in the presence of a master.
(Create_Anonymous_Master): Do not call Set_Base_Pool.
(Build_Finalization_Master): Likewise.
* rtsfind.ads (RE_Id): Remove RE_Base_Pool and RE_Set_Base_Pool.
(RE_Unit_Table): Remove associated entries.
* libgnat/s-finmas.ads: Remove clause for System.Storage_Pools.
(Any_Storage_Pool_Ptr): Delete.
(Finalization_Master): Remove Base_Pool component.
(Base_Pool): Delete.
(Set_Base_Pool): Likewise.
* libgnat/s-finmas.adb (Base_Pool): Likewise.
(Set_Base_Pool): Likewise.
(Print_Master): Do not print Base_Pool.
Eric Botcazou [Mon, 22 Jan 2024 17:19:26 +0000 (18:19 +0100)]
ada: Small cleanup in the BIP machinery
This avoids creating Null nodes when they are not used in the end and makes
the implementation of Add_Finalization_Master_Actual_To_Build_In_Place_Call
more consistent with that of its sibling routines. No functional changes.
gcc/ada/
* exp_ch6.adb (Add_Unconstrained_Actuals_To_Build_In_Place_Call):
Rename Pool_Actual into Pool_Exp and use Empty as default value.
(Add_Finalization_Master_Actual_To_Build_In_Place_Call): Change the
names of the first two parameters and use a simpler code structure.
(Make_Build_In_Place_Call_In_Allocator): Rename the local variable
for the pool actual and set it to Empty if it is not used.
(Make_Build_In_Place_Call_In_Object_Declaration): Rename the local
variable for the master actual.
Eric Botcazou [Sat, 20 Jan 2024 23:29:45 +0000 (00:29 +0100)]
ada: Restore fix for controlled dynamic allocation with BIP function call
The resolution made some time ago had been that a dynamic allocation for
a limited type that needs finalization with a function call as expression
always needs to be done in the called function, even if the limited type
has a known size. But the fix implementing this resolution was dropped
inadvertently at some point.
The change also contains a small tweak for Expand_N_Object_Declaration
and a small related cleanup in the finalization machinery.
gcc/ada/
* exp_ch3.adb (Expand_N_Object_Declaration): In the case of a
return object of a BIP function that needs finalization, save
the assignment statement made to initialize it, if any.
* exp_ch6.ads (BIP_Formal_Kind): Adjust description.
* exp_ch6.adb (Make_Build_In_Place_Call_In_Allocator): Make a
couple of adjustments to the commentary.
(Needs_BIP_Alloc_Form): Also return true if the function needs
a BIP_Finalization_Master parameter.
* exp_ch7.adb (Build_BIP_Cleanup_Stmts): Remove now always true
test on Needs_BIP_Alloc_Form.
(Attach_Object_To_Master_Node): Remove duplication in comment.
Eric Botcazou [Thu, 18 Jan 2024 15:25:06 +0000 (16:25 +0100)]
ada: Fix internal error with Put_Image aspect on access-to-class-wide type
This occurs with an instantiation of Ada.Containers.Vectors in a nested
package on an access-to-class-wide type declared with the Put_Image aspect
because of too late a freezing for the internal renaming generated for the
Put_Image procedure.
The change freezes this renaming immediately in this particular case; this
is similar to a trick used in Build_Array_Put_Image_Procedure.
gcc/ada/
* sem_ch13.adb (New_Put_Image_Subprogram): In the nondeferred case
coming from an aspect and for a type with delaying freezing, also
freeze the subprogram immediately.
Piotr Trojanek [Tue, 14 Jun 2022 11:08:38 +0000 (13:08 +0200)]
ada: Refactor GNAT.Directory_Operations.Read to minimise runtime checks
Array assignments are likely more efficient than element-by-element
copying; in particular, they avoid constraints checks in every iteration
of a loop (when the runtime is compiled with checks enabled).
A cleanup and improvement opportunity spotted while working on improved
detection of uninitialised local scalar objects.
gcc/ada/
* libgnat/g-dirope.adb (Read): Use null-excluding,
access-to-constant type; replace element-by-element copy with
array assignments.
Gary Dismukes [Tue, 16 Jan 2024 22:11:52 +0000 (22:11 +0000)]
ada: Compiler crash on nonstatic container aggregates for Doubly_Linked_Lists
The compiler was crashing on container aggregates for the List type
coming from an instantiation of Ada.Containers.Doubly_Linked_Lists
when the aggregate has more than one iterated_element_association
with nonstatic range bounds. As part of addressing this, it was
noticed that there were also somewhat related problems with container
aggregates associated with the Ada.Containers.Bounded_Doubly_Linked_Lists
generic (and likely others like it) and mishandling of certain cases of
indexed aggregates, and those are also addressed by this set of changes.
In the case of container aggregates with at least one association with
a nonstatic range, the total length of the aggregate is determined by
expansion actions of Aggregate_Size.
gcc/ada/
* exp_aggr.adb (Expand_Container_Aggregate): Move determination of
whether the aggregate is an indexed aggregate earlier in the
procedure. Test Is_Indexed_Aggregate as a criterion for generating
a call to the container type's New_Indexed function, add proper
computation of bounds to pass in to the function, and remove later
code for generating such a call. Add and improve comments.
(Aggregate_Size): Remove special treatment of case where there is
exactly one component association, and instead loop over all
component associations to determine whether any of them have a
nonstatic length. If there is at least one such nonstatic
association, return -1.
(Build_Siz_Exp): Accumulate a sum of the sizes of each of the
component associations in Siz_Exp (which will only be used if
there any associations that are of Nkind
N_Iterated_Component_Association with a nonstatic range).
(Expand_Range_Component): Fix typos in the procedure's spec
comment and block comment.
Paul Thomas [Mon, 13 May 2024 06:27:20 +0000 (07:27 +0100)]
Fortran: Fix wrong code in unlimited polymorphic assignment [PR113363]
2024-05-13 Paul Thomas <pault@gcc.gnu.org>
gcc/fortran
PR fortran/113363
* trans-array.cc (gfc_array_init_size): Use the expr3 dtype so
that the correct element size is used.
* trans-expr.cc (gfc_conv_procedure_call): Remove restriction
that ss and ss->loop be present for the finalization of class
array function results.
(trans_class_assignment): Use free and malloc, rather than
realloc, for character expressions assigned to unlimited poly
entities.
* trans-stmt.cc (gfc_trans_allocate): Build a correct rhs for
the assignment of an unlimited polymorphic 'source'.
gcc/testsuite/
PR fortran/113363
* gfortran.dg/pr113363.f90: New test.
Roger Sayle [Sun, 12 May 2024 15:27:22 +0000 (16:27 +0100)]
arm: Use utxb rN, rM, ror #8 to implement zero_extract on armv6.
Examining the code generated for the following C snippet on a
raspberry pi:
int popcount_lut8(unsigned *buf, int n)
{
int cnt=0;
unsigned int i;
do {
i = *buf;
cnt += lut[i&255];
cnt += lut[i>>8&255];
cnt += lut[i>>16&255];
cnt += lut[i>>24];
buf++;
} while(--n);
return cnt;
}
I was surprised to see following instruction sequence generated by the
compiler:
mov r5, r2, lsr #8
uxtb r5, r5
This sequence can be performed by a single ARM instruction:
uxtb r5, r2, ror #8
The attached patch allows GCC's combine pass to take advantage of ARM's
uxtb with rotate functionality to implement the above zero_extract, and
likewise to use the sxtb with rotate to implement sign_extract. ARM's
uxtb and sxtb can only be used with rotates of 0, 8, 16 and 24, and of
these only the 8 and 16 are useful [ror #0 is a nop, and extends with
ror #24 can be implemented using regular shifts], so the approach here
is to add the six missing but useful instructions as 6 different
define_insn in arm.md, rather than try to be clever with new predicates.
Later ARM hardware has advanced bit field instructions, and earlier
ARM cores didn't support extend-with-rotate, so this appears to only
benefit armv6 era CPUs (e.g. the raspberry pi).
Patch posted:
https://gcc.gnu.org/legacy-ml/gcc-patches/2018-01/msg01339.html
Approved by Kyrill Tkachov:
https://gcc.gnu.org/legacy-ml/gcc-patches/2018-01/msg01881.html
2024-05-12 Roger Sayle <roger@nextmovesoftware.com>
Kyrill Tkachov <kyrylo.tkachov@foss.arm.com>
Jeff Law [Sun, 12 May 2024 13:12:04 +0000 (07:12 -0600)]
[to-be-committed,RISC-V] Improve usage of slli.uw in constant synthesis
And an improvement to using slli.uw...
I recently added the ability to use slli.uw in the synthesis path. That
code was conditional on the right justified constant being a LUI_OPERAND
after sign extending from bit 31 to bit 63.
That code is working fine, but could be improved. Specifically there's
no reason it shouldn't work for LUI+ADDI under the same circumstances.
So rather than testing the sign extended, right justified constant is a
LUI_OPERAND, we can just test that the right justified constant has
precisely 32 leading zeros.
gcc/
* config/riscv/riscv.cc (riscv_build_integer_1): Use slli.uw more.
gcc/testsuite
* gcc.target/riscv/synthesis-5.c: New test.
Jeff Law [Sun, 12 May 2024 13:05:43 +0000 (07:05 -0600)]
[to-be-committed] RISC-V Fix minor regression in synthesis WRT bseti usage
Overnight testing showed a small number of cases where constant synthesis was
doing something dumb. Specifically generating more instructions than the
number of bits set in the constant.
It was a minor goof in the recent bseti code. In the code to first figure out
what bits LUI could set, I included one bit outside the space LUI operates.
For some dumb reason I kept thinking in terms of 11 low bits belonging to addi,
but it's actually 12 bits. The net is what we thought should be a single LUI
for costing turned into LUI+ADDI.
I didn't let the test run to completion, but over the course of 12 hours it
found 9 cases. Given we know that the triggers all have 0x800 set, I bet we
could likely find more, but I doubt it's that critical to cover every possible
constant that regressed.
gcc/
* config/riscv/riscv.cc (riscv_build_integer_1): Fix thinko in testing
when lui can be used to set several bits in bseti path.
Mark Wielaard [Sun, 12 May 2024 12:37:58 +0000 (14:37 +0200)]
Regenerate cygming.opt.urls and mingw.opt.urls
The new cygming.opt.urls and mingw.opt.urls in the
gcc/config/mingw/cygming.opt.urls directory need to generated by make
regenerate-opt-urls in the gcc subdirectory. They still contained
references to the gcc/config/i386 directory from which they were
copied.
Fixes: 1f05dfc131c7 ("Reuse MinGW from i386 for AArch64") Fixes: e8d003736e6c ("Rename "x86 Windows Options" to "Cygwin and MinGW Options"")
gcc/ChangeLog:
Paul Thomas [Sun, 12 May 2024 05:59:45 +0000 (06:59 +0100)]
Fortran: Unlimited polymorphic intrinsic function arguments [PR84006]
2024-05-12 Paul Thomas <pault@gcc.gnu.org>
gcc/fortran
PR fortran/84006
PR fortran/100027
PR fortran/98534
* iresolve.cc (gfc_resolve_transfer): Emit a TODO error for
unlimited polymorphic mold.
* trans-expr.cc (gfc_resize_class_size_with_len): Use the fold
even if a block is not available in which to fix the result.
(trans_class_assignment): Enable correct assignment of
character expressions to unlimited polymorphic variables using
lhs _len field and rse string_length.
* trans-intrinsic.cc (gfc_conv_intrinsic_storage_size): Extract
the class expression so that the unlimited polymorphic class
expression can be used in gfc_resize_class_size_with_len to
obtain the storage size for character payloads. Guard the use
of GFC_DECL_SAVED_DESCRIPTOR by testing for DECL_LANG_SPECIFIC
to prevent the ICE. Also, invert the order to use the class
expression extracted from the argument.
(gfc_conv_intrinsic_transfer): In same way as 'storage_size',
use the _len field to obtaining the correct length for arg 1.
Add a branch for the element size in bytes of class expressions
with provision to make use of the unlimited polymorphic _len
field. Again, the class references are explicitly identified.
'mold_expr' was already declared. Use it instead of 'arg'. Do
not fix 'dest_word_len' for deferred character sources because
reallocation on assign makes use of it before it is assigned.
gcc/testsuite/
PR fortran/84006
PR fortran/100027
* gfortran.dg/storage_size_7.f90: New test.
PR fortran/98534
* gfortran.dg/transfer_class_4.f90: New test.
Mark Harmstone [Sat, 11 May 2024 14:24:59 +0000 (08:24 -0600)]
[PATCH v4 4/4] Output S_COMPILE3 symbol in CodeView debug section
Outputs the S_COMPILE3 symbol in the CodeView .debug$S debug section.
The DEBUG_S_SYMBOLS block added here makes up pretty much everything
that isn't data structures or line numbers; we add the S_COMPILE3 symbol
here to start it off.
This is a descriptive bit, the most interesting part of which is the
version of the compiler used.
Mark Harmstone [Sat, 11 May 2024 14:08:50 +0000 (08:08 -0600)]
[PATCH v2 1/4] Support for CodeView debugging format
This patch and the following add initial support for Microsoft's
CodeView debugging format, as used by MSVC, to mingw targets.
Note that you will need a recent version of binutils for this to be
useful. The best way to view the output is to run Microsoft's
cvdump.exe, found in their microsoft-pdb repo on GitHub, against the
object files.
dzhao.ampere [Fri, 10 May 2024 03:55:18 +0000 (11:55 +0800)]
tree-optimization/114760 - check variants of >> and << in loop-niter
When recognizing bit counting idiom, include pattern "x * 2"
for "x << 1", and "x / 2" for "x >> 1" (given x is unsigned).
gcc/ChangeLog:
PR tree-optimization/114760
* tree-ssa-loop-niter.cc (is_lshift_by_1): New function
to check if STMT is equivalent to x << 1.
(is_rshift_by_1): New function to check if STMT is
equivalent to x >> 1.
(number_of_iterations_cltz): Enhance the identification
of logical shift by one.
(number_of_iterations_cltz_complement): Enhance the
identification of logical shift by one.
gcc/testsuite/ChangeLog:
PR tree-optimization/114760
* gcc.dg/tree-ssa/pr114760-1.c: New test.
* gcc.dg/tree-ssa/pr114760-2.c: New test.
Aldy Hernandez [Fri, 10 May 2024 16:55:34 +0000 (18:55 +0200)]
[prange] Default unimplemented prange operators to false.
The canonical way to indicate that a range operator is unsupported is
to return false, which has the sematic meaning of VARYING. This patch
cleans up a few default virtuals that were trying harder to set
VARYING manually.
Aldy Hernandez [Fri, 10 May 2024 21:21:29 +0000 (23:21 +0200)]
[prange] Do not trap by default on range dispatch mismatches.
The trap in the range-op dispatch code is really an internal debugging
aid, and only a temporary one for a few weeks while the dust settles.
This patch turns it off by default, allowing problematic passes to
turn it on for analysis.
gcc/ChangeLog:
* range-op.cc (TRAP_ON_UNHANDLED_POINTER_OPERATORS): New
(range_op_handler::fold_range): Use it.
(range_op_handler::op1_range): Same.
(range_op_handler::op2_range): Same.
(range_op_handler::lhs_op1_relation): Same.
(range_op_handler::lhs_op2_relation): Same.
(range_op_handler::op1_op2_relation): Same.
* g++.dg/ext/has-builtin-1.C: Test existence of __is_invocable.
* g++.dg/ext/is_invocable1.C: New test.
* g++.dg/ext/is_invocable2.C: New test.
* g++.dg/ext/is_invocable3.C: New test.
* g++.dg/ext/is_invocable4.C: New test.
Signed-off-by: Ken Matsui <kmatsui@gcc.gnu.org> Reviewed-by: Patrick Palka <ppalka@redhat.com> Reviewed-by: Jason Merrill <jason@redhat.com>
Jeff Law [Fri, 10 May 2024 19:49:44 +0000 (13:49 -0600)]
[RISC-V] Use shNadd for constant synthesis
So here's the next idiom to improve constant synthesis.
The basic idea here is to try and use shNadd to generate the constant when profitable.
Let's take 0x300000801. Right now that generates:
li a0,3145728
addi a0,a0,1
slli a0,a0,12
addi a0,a0,-2047
But we can do better. The constant is evenly divisible by 9 resulting in
0x55555639 which doesn't look terribly interesting. But that constant can be
generated with two instructions, then we can use a sh3add to multiply it by 9.
So the updated sequence looks like:
This doesn't trigger a whole lot, but I haven't really set up a test to explore
the most likely space where this might be useful. The tests were found
exploring a different class of constant synthesis problems.
If you were to dive into the before/after you'd see that the shNadd interacts
quite nicely with the recent bseti work. The joys of recursion.
Probably the most controversial thing in here is using the "FMA" opcode to
stand in for when we want to use shNadd. Essentially when we synthesize a
constant we generate a series of RTL opcodes and constants for emission by
another routine. We don't really have a way to say we want a shift-add. But
you can think of shift-add as a limited form of multiply-accumulate. It's a
bit of a stretch, but not crazy bad IMHO.
Other approaches would be to store our own enum rather than an RTL opcode. Or
store an actual generator function rather than any kind of opcode.
It wouldn't take much pushback over (ab)using FMA in this manner to get me to
use our own enums rather than RTL opcodes for this stuff.
gcc/
* config/riscv/riscv.cc (riscv_build_integer_1): Recognize cases where
we can use shNadd to improve constant synthesis.
(riscv_move_integer): Handle code generation for shNadd.
gcc/testsuite
* gcc.target/riscv/synthesis-1.c: Also count shNadd instructions.
* gcc.target/riscv/synthesis-3.c: New test.
This patch also fixes the FAILs of gcc.target/i386/vect-shiftv[48]qi.c
when run with the additional -march=cascadelake flag, by splitting these
tests into two; one form testing code generation with -msse2 (and
-mno-avx512vl) as originally intended, and the other testing AVX512
code generation with an explicit -march=cascadelake.
2024-05-10 Roger Sayle <roger@nextmovesoftware.com>
Hongtao Liu <hongtao.liu@intel.com>
gcc/ChangeLog
* config/i386/i386-expand.cc (ix86_expand_vecop_qihi_partial):
Don't attempt ix86_expand_vec_shift_qihi_constant on SSE4.1.
gcc/testsuite/ChangeLog
* gcc.target/i386/vect-shiftv4qi.c: Specify -mno-avx512vl.
* gcc.target/i386/vect-shiftv8qi.c: Likewise.
* gcc.target/i386/vect-shiftv4qi-2.c: New test case.
* gcc.target/i386/vect-shiftv8qi-2.c: Likewise.
[PR114942][LRA]: Don't reuse input reload reg of inout early clobber operand
The insn in question has the same reg in inout operand and input
operand. The inout operand is early clobber. LRA reused input reload
reg of the inout operand for the input operand which is wrong. It
were a good decision if the inout operand was not early clobber one.
The patch rejects the reuse for the PR test case.
gcc/ChangeLog:
PR target/114942
* lra-constraints.cc (struct input_reload): Add new member early_clobber_p.
(get_reload_reg): Add new arg early_clobber_p, don't reuse input
reload with true early_clobber_p member value, use the arg for new
element of curr_insn_input_reloads.
(match_reload): Assign false to early_clobber_p member.
(process_addr_reg, simplify_operand_subreg, curr_insn_transform):
Adjust get_reload_reg calls.
Richard Biener [Fri, 10 May 2024 12:19:49 +0000 (14:19 +0200)]
tree-optimization/114998 - use-after-free with loop distribution
When loop distribution releases a PHI node of the original IL it
can end up clobbering memory that's re-used when it upon releasing
its RDG resets all stmt UIDs back to -1, even those that got released.
The fix is to avoid resetting UIDs based on stmts in the RDG but
instead reset only those still present in the loop.
PR tree-optimization/114998
* tree-loop-distribution.cc (free_rdg): Take loop argument.
Reset UIDs of stmts still in the IL rather than all stmts
referenced from the RDG.
(loop_distribution::build_rdg): Pass loop to free_rdg.
(loop_distribution::distribute_loop): Likewise.
(loop_distribution::transform_reduction_loop): Likewise.
Richard Biener [Fri, 1 Mar 2024 08:29:32 +0000 (09:29 +0100)]
Allow patterns in SLP reductions
The following removes the over-broad rejection of patterns for SLP
reductions which is done by removing them from LOOP_VINFO_REDUCTIONS
during pattern detection. That's also insufficient in case the
pattern only appears on the reduction path. Instead this implements
the proper correctness check in vectorizable_reduction and guides
SLP discovery to heuristically avoid forming later invalid groups.
I also couldn't find any testcase that FAILs when allowing the SLP
reductions to form so I've added one.
I came across this for single-lane SLP reductions with the all-SLP
work where we rely on patterns to properly vectorize COND_EXPR
reductions.
* tree-vect-patterns.cc (vect_pattern_recog_1): Do not
remove reductions involving patterns.
* tree-vect-loop.cc (vectorizable_reduction): Reject SLP
reduction groups with multiple lane-reducing reductions.
* tree-vect-slp.cc (vect_analyze_slp_instance): When discovering
SLP reduction groups avoid including lane-reducing ones.
Jose E. Marchesi [Fri, 10 May 2024 07:50:25 +0000 (09:50 +0200)]
bpf: fix printing of memory operands in pseudoc asm dialect
The BPF backend was emitting memory operands in pseudo-C syntax
without surrounding parentheses. These were being provided in the
corresponding instruction templates.
This was causing GCC emitting invalid instructions when finding inline
assembly with memory operands like:
This patch changes the backend to include the surrounding parentheses
in the printed representation of the memory operands (much like
surrounding brackets are included in normal asm syntax) and adapts the
impacted instruction templates accordingly.
Tested in target bpf-unknown-none, host x86_64-linux-gnu.
Jakub Jelinek [Fri, 10 May 2024 07:21:38 +0000 (09:21 +0200)]
c++, mingw: Fix up types of dtor hooks to __cxa_{,thread_}atexit/__cxa_throw on mingw ia32 [PR114968]
__cxa_atexit/__cxa_thread_atexit/__cxa_throw functions accept function
pointers to usually directly destructors rather than wrappers around
them.
Now, mingw ia32 uses implicitly __attribute__((thiscall)) calling
conventions for METHOD_TYPE (where the this pointer is passed in %ecx
register, the rest on the stack), so these functions use:
in config/os/mingw32/os_defines.h:
#if defined (__i386__)
#define _GLIBCXX_CDTOR_CALLABI __thiscall
#endif
in libsupc++/cxxabi.h
__cxa_atexit(void (_GLIBCXX_CDTOR_CALLABI *)(void*), void*, void*) _GLIBCXX_NOTHROW;
__cxa_thread_atexit(void (_GLIBCXX_CDTOR_CALLABI *)(void*), void*, void *) _GLIBCXX_NOTHROW;
__cxa_throw(void*, std::type_info*, void (_GLIBCXX_CDTOR_CALLABI *) (void *))
__attribute__((__noreturn__));
Now, mingw for some weird reason uses
#define TARGET_CXX_USE_ATEXIT_FOR_CXA_ATEXIT hook_bool_void_true
so it never actually uses __cxa_atexit, but does use __cxa_thread_atexit
and __cxa_throw. Recent changes for modules result in more detailed
__cxa_*atexit/__cxa_throw prototypes precreated by the compiler, and if
that happens and one also includes <cxxabi.h>, the compiler complains about
mismatches in the prototypes.
One thing is the missing thiscall attribute on the FUNCTION_TYPE, the
other problem is that all of atexit/__cxa_atexit/__cxa_thread_atexit
get function pointer types created by a single function,
get_atexit_fn_ptr_type (), which creates it depending on if atexit
or __cxa_atexit will be used as either void(*)(void) or void(*)(void *),
but when using atexit and __cxa_thread_atexit it uses the wrong function
type for __cxa_thread_atexit.
The following patch adds a target hook to add the thiscall attribute to the
function pointers, and splits the get_atexit_fn_ptr_type () function into
get_atexit_fn_ptr_type () and get_cxa_atexit_fn_ptr_type (), the former always
creates shared void(*)(void) type, the latter creates either
void(*)(void*) (on most targets) or void(__attribute__((thiscall))*)(void*)
(on mingw ia32). So that we don't waiste another GTY global tree for it,
because cleanup_type used for the same purpose for __cxa_throw should be
the same, the code changes it to use that type too.
In register_dtor_fn then based on the decision whether to use atexit,
__cxa_atexit or __cxa_thread_atexit it picks the right function pointer
type, and also if it decides to emit a __tcf_* wrapper for the cleanup,
uses that type for that wrapper so that it agrees on calling convention.
2024-05-10 Jakub Jelinek <jakub@redhat.com>
PR target/114968
gcc/
* target.def (use_atexit_for_cxa_atexit): Remove spurious space
from comment.
(adjust_cdtor_callabi_fntype): New cxx target hook.
* targhooks.h (default_cxx_adjust_cdtor_callabi_fntype): Declare.
* targhooks.cc (default_cxx_adjust_cdtor_callabi_fntype): New
function.
* doc/tm.texi.in (TARGET_CXX_ADJUST_CDTOR_CALLABI_FNTYPE): Add.
* doc/tm.texi: Regenerate.
* config/i386/i386.cc (ix86_cxx_adjust_cdtor_callabi_fntype): New
function.
(TARGET_CXX_ADJUST_CDTOR_CALLABI_FNTYPE): Redefine.
gcc/cp/
* cp-tree.h (atexit_fn_ptr_type_node, cleanup_type): Adjust macro
comments.
(get_cxa_atexit_fn_ptr_type): Declare.
* decl.cc (get_atexit_fn_ptr_type): Adjust function comment, only
build type for atexit argument.
(get_cxa_atexit_fn_ptr_type): New function.
(get_atexit_node): Call get_cxa_atexit_fn_ptr_type rather than
get_atexit_fn_ptr_type when using __cxa_atexit.
(get_thread_atexit_node): Call get_cxa_atexit_fn_ptr_type
rather than get_atexit_fn_ptr_type.
(start_cleanup_fn): Add ob_parm argument, call
get_cxa_atexit_fn_ptr_type or get_atexit_fn_ptr_type depending
on it and create PARM_DECL also based on that argument.
(register_dtor_fn): Adjust start_cleanup_fn caller, use
get_cxa_atexit_fn_ptr_type rather than get_atexit_fn_ptr_type
for use_dtor casts.
* except.cc (build_throw): Use get_cxa_atexit_fn_ptr_type ().
Aldy Hernandez [Thu, 9 May 2024 21:37:30 +0000 (23:37 +0200)]
[prange] Do not assume all pointers are the same size [PR115009]
In a world with same sized pointers we can always reuse the storage
slots, but since this is not always the case, we need to be more
careful. However, we can always store an undefined, because that
requires no extra storage.
gcc/ChangeLog:
PR tree-optimization/115009
* value-range-storage.cc (prange_storage::alloc): Do not assume
all pointers are the same size.
(prange_storage::prange_storage): Same.
(prange_storage::fits_p): Same.
Xi Ruoyao [Wed, 8 May 2024 03:25:57 +0000 (11:25 +0800)]
driver: Move -fdiagnostics-urls= early like -fdiagnostics-color= [PR114980]
In GCC 14 we started to emit URLs for "command-line option <option> is
valid for <language> but not <another language>" and "-Werror= argument
'-Werror=<option>' is not valid for <language>" warnings. So we should
have moved -fdiagnostics-urls= early like -fdiagnostics-color=, or
-fdiagnostics-urls= wouldn't be able to control URLs in these warnings.
No test cases are added because with TERM=xterm-256colors PR114980
already triggers some test failures.
gcc/ChangeLog:
PR driver/114980
* opts-common.cc (prune_options): Move -fdiagnostics-urls=
early like -fdiagnostics-color=.
Jeff Law [Fri, 10 May 2024 03:07:06 +0000 (21:07 -0600)]
[committed] [RISC-V] Provide splitting guidance to combine to faciliate shNadd.uw generation
This fixes a minor code quality issue I found while comparing GCC and LLVM.
Essentially we want to do a bit of re-association to generate shNadd.uw
instructions.
Combine does the right thing and finds all the necessary instructions,
reassociates the operands, combines constants, etc. Where is fails is finding
a good split point. The backend can trivially provide guidance on how to split
via a define_split pattern.
This has survived both Ventana's internal CI system (rv64gcb) as well as my own
(rv64gc, rv32gcv).
I'll wait for the external CI system to give the all-clear before pushing.
gcc/
* config/riscv/bitmanip.md: Add splitter for shadd feeding another
add instruction.
Roger Sayle [Thu, 9 May 2024 21:45:54 +0000 (22:45 +0100)]
Constant fold {-1,-1} << 1 in simplify-rtx.cc
This patch addresses a missed optimization opportunity in the RTL
optimization passes. The function simplify_const_binary_operation
will constant fold binary operators with two CONST_INT operands,
and those with two CONST_VECTOR operands, but is missing compile-time
evaluation of binary operators with a CONST_VECTOR and a CONST_INT,
such as vector shifts and rotates.
The first version of this patch didn't contain a switch statement to
explicitly check for valid binary opcodes, which bootstrapped and
regression tested fine, but my paranoia has got the better of me,
so this version now checks that VEC_SELECT or some funky (future)
rtx_code doesn't cause problems.
2024-05-09 Roger Sayle <roger@nextmovesoftware.com>
gcc/ChangeLog
* simplify-rtx.cc (simplify_const_binary_operation): Constant
fold binary operations where the LHS is CONST_VECTOR and the
RHS is CONST_INT (or CONST_DOUBLE) such as vector shifts.
Marek Polacek [Wed, 8 May 2024 21:02:49 +0000 (17:02 -0400)]
c++: failure to suppress -Wsizeof-array-div in template [PR114983]
-Wsizeof-array-div offers a way to suppress the warning by wrapping
the second operand of the division in parens:
sizeof (samplesBuffer) / (sizeof(unsigned char))
but this doesn't work in a template, because we fail to propagate
the suppression bits. Do it, then.
The finish_parenthesized_expr hunk is not needed because suppress_warning
isn't very fine-grained. But I think it makes sense to be explicit and
not rely on OPT_Wparentheses also suppressing OPT_Wsizeof_array_div.
PR c++/114983
gcc/cp/ChangeLog:
* pt.cc (tsubst_expr) <case SIZEOF_EXPR>: Use copy_warning.
* semantics.cc (finish_parenthesized_expr): Also suppress
-Wsizeof-array-div.
Jakub Jelinek [Thu, 9 May 2024 18:59:05 +0000 (20:59 +0200)]
testsuite: Fix up pr84508* tests [PR84508]
The tests FAIL on x86_64-linux with
/usr/bin/ld: cannot find -lubsan
collect2: error: ld returned 1 exit status
compiler exited with status 1
FAIL: gcc.target/i386/pr84508-1.c (test for excess errors)
Excess errors:
/usr/bin/ld: cannot find -lubsan
The problem is that only *.dg/ubsan/ubsan.exp calls ubsan_init
which adds the needed search paths to libubsan library.
So, link/run tests for -fsanitize=undefined need to go into
gcc.dg/ubsan/ or g++.dg/ubsan/, even when they are target specific.
2024-05-09 Jakub Jelinek <jakub@redhat.com>
PR target/84508
* gcc.target/i386/pr84508-1.c: Move to ...
* gcc.dg/ubsan/pr84508-1.c: ... here. Restrict to i?86/x86_64
non-ia32 targets.
* gcc.target/i386/pr84508-2.c: Move to ...
* gcc.dg/ubsan/pr84508-2.c: ... here. Restrict to i?86/x86_64
non-ia32 targets.
Gaius Mulley [Thu, 9 May 2024 18:35:20 +0000 (19:35 +0100)]
PR modula2/115003 exporting a symbol to outer scope with a name clash causes ICE
An ICE will occur if an unknown symbol is exported and causes a name
clash. The error mechanism attempts to find the scope of an unknown
symbol. This patch adds a missing case clause to GetScope and returns
NulSym if the scope is an unknown symbol.
gcc/m2/ChangeLog:
PR modula2/115003
* gm2-compiler/SymbolTable.mod (GetScope): Add UndefinedSym
case clause and return NulSym.
<https://wg21.link/p1381r1> clarifies that it's OK to capture structured
bindings.
[expr.prim.lambda.capture]/4 says "The identifier in a simple-capture shall
denote a local entity" and [basic.pre]/3: "An entity is a [...] structured
binding".
It doesn't appear that this was made a DR, so, strictly speaking, we
should have a -Wc++20-extensions warning, like clang++.
PR c++/85889
gcc/cp/ChangeLog:
* lambda.cc (add_capture): Add a pedwarn for capturing structured
bindings.
gcc/testsuite/ChangeLog:
* g++.dg/cpp2a/decomp3.C: Use -Wno-c++20-extensions.
* g++.dg/cpp1z/decomp60.C: New test.
Martin Jambor [Thu, 9 May 2024 14:39:44 +0000 (16:39 +0200)]
sra: Do not leave work for DSE (that it can sometimes not perform)
When looking again at the g++.dg/tree-ssa/pr109849.C testcase we
discovered that it generates terrible store-to-load forwarding stalls
because SRA was leaving behind aggregate loads but all the stores were
by scalar parts and DSE failed to remove the useless load. SRA has
all the knowledge to remove the statement even now, so this small
patch makes it do so.
With this patch, the g++.dg/tree-ssa/pr109849.C micro-benchmark runs 9
times faster (on an AMD EPYC 75F3 machine).
gcc/ChangeLog:
2024-04-18 Martin Jambor <mjambor@suse.cz>
* tree-sra.cc (sra_modify_assign): Remove the original statement
also when dealing with a store to a fully covered aggregate from a
non-candidate.
gcc/testsuite/ChangeLog:
2024-04-23 Martin Jambor <mjambor@suse.cz>
* g++.dg/tree-ssa/pr109849.C: Also check that the aggeegate store
to cur disappears.
* gcc.dg/tree-ssa/ssa-dse-26.c: Instead of relying on DSE,
check that the unwanted stores were removed at early SRA time.
Pan Li [Thu, 9 May 2024 02:56:46 +0000 (10:56 +0800)]
RISC-V: Make full-vec-move1.c test robust for optimization
During investigate the support of early break autovec, we notice
the test full-vec-move1.c will be optimized to 'return 0;' in main
function body. Because somehow the value of V type is compiler
time constant, and then the second loop will be considered as
assert (true).
Thus, the ccp4 pass will eliminate these stmt and just return 0.
typedef int16_t V __attribute__((vector_size (128)));
int main ()
{
V v;
for (int i = 0; i < sizeof (v) / sizeof (v[0]); i++)
(v)[i] = i;
V res = v;
for (int i = 0; i < sizeof (v) / sizeof (v[0]); i++)
assert (res[i] == i); // will be optimized to assert (true)
}
This patch would like to introduce a extern function to use the res[i]
that get rid of the ccp4 optimization.
gcc/testsuite/ChangeLog:
* gcc.target/riscv/rvv/autovec/vls-vlmax/full-vec-move1.c:
Introduce extern func use to get rid of ccp4 optimization.
Jakub Jelinek [Thu, 9 May 2024 09:18:21 +0000 (11:18 +0200)]
testsuite: Fix up vector-subaccess-1.C test for ia32 [PR89224]
The test FAILs on i686-linux due to
.../gcc/testsuite/g++.dg/torture/vector-subaccess-1.C:16:6: warning: SSE vector argument without SSE enabled changes the ABI [-Wpsabi]
excess warnings.
This fixes it by adding -Wno-psabi, like commonly done in other tests.
2024-05-09 Jakub Jelinek <jakub@redhat.com>
PR c++/89224
* g++.dg/torture/vector-subaccess-1.C: Add -Wno-psabi as additional
options.
cpymemsi expansion was available for RISC-V since the initial port.
However, there are not tests to detect regression.
This patch adds such tests.
Three of the tests target the expansion requirements (known length and
alignment). One test reuses an existing memcpy test from the by-pieces
framework (gcc/testsuite/gcc.dg/torture/inline-mem-cpy-1.c).
gcc/testsuite/ChangeLog:
* gcc.target/riscv/cpymemsi-1.c: New test.
* gcc.target/riscv/cpymemsi-2.c: New test.
* gcc.target/riscv/cpymemsi-3.c: New test.
* gcc.target/riscv/cpymemsi.c: New test.
Signed-off-by: Christoph Müllner <christoph.muellner@vrull.eu>