Prathamesh Kulkarni [Fri, 15 Jul 2022 00:56:50 +0000 (06:26 +0530)]
[aarch64] Use op_mode instead of vmode in aarch64_vectorize_vec_perm_const.
gcc/ChangeLog:
* config/aarch64/aarch64.cc (aarch64_vectorize_vec_perm_const): Use
op_mode instead of vmode in calls to force_reg for op0 and op1.
GCC Administrator [Fri, 15 Jul 2022 00:16:22 +0000 (00:16 +0000)]
Daily bump.
H.J. Lu [Fri, 17 Jun 2022 14:33:06 +0000 (07:33 -0700)]
Simplify memchr with small constant strings
When memchr is applied on a constant string of no more than the bytes of
a word, simplify memchr by checking each byte in the constant string.
int f (int a)
{
return __builtin_memchr ("AE", a, 2) != 0;
}
is simplified to
int f (int a)
{
return ((char) a == 'A' || (char) a == 'E') != 0;
}
gcc/
PR tree-optimization/103798
* tree-ssa-forwprop.cc: Include "tree-ssa-strlen.h".
(simplify_builtin_call): Inline memchr with constant strings of
no more than the bytes of a word.
* tree-ssa-strlen.cc (use_in_zero_equality): Make it global.
* tree-ssa-strlen.h (use_in_zero_equality): New.
gcc/testsuite/
PR tree-optimization/103798
* c-c++-common/pr103798-1.c: New test.
* c-c++-common/pr103798-2.c: Likewise.
* c-c++-common/pr103798-3.c: Likewise.
* c-c++-common/pr103798-4.c: Likewise.
* c-c++-common/pr103798-5.c: Likewise.
* c-c++-common/pr103798-6.c: Likewise.
* c-c++-common/pr103798-7.c: Likewise.
* c-c++-common/pr103798-8.c: Likewise.
* c-c++-common/pr103798-9.c: Likewise.
* c-c++-common/pr103798-10.c: Likewise.
Harald Anlauf [Thu, 14 Jul 2022 20:24:55 +0000 (22:24 +0200)]
Fortran: error recovery for bad initializers of implied-shape arrays [PR106209]
gcc/fortran/ChangeLog:
PR fortran/106209
* decl.cc (add_init_expr_to_sym): Handle bad initializers for
implied-shape arrays.
gcc/testsuite/ChangeLog:
PR fortran/106209
* gfortran.dg/pr106209.f90: New test.
Co-authored-by: Steven G. Kargl <kargl@gcc.gnu.org>
Jonathan Wakely [Wed, 13 Jul 2022 11:28:11 +0000 (12:28 +0100)]
jit: Make recording::memento non-copyable
gcc/jit/ChangeLog:
* jit-recording.h (recording::memento): Define copy constructor
and copy assignment operator as deleted.
(recording::string): Likewise.
(recording::string::c_str): Add const qualifier.
Martin Liska [Thu, 14 Jul 2022 07:51:33 +0000 (09:51 +0200)]
lto-plugin: use -pthread only for detected targets
Use -pthread only if we are going to use pthread functionality.
PR bootstrap/106156
lto-plugin/ChangeLog:
* Makefile.am: Use ac_lto_plugin_extra_ldflags for AM_LDFLAGS.
* configure.ac: Use AC_SUBST(ac_lto_plugin_extra_ldflags).
* Makefile.in: Regenerate.
* configure: Regenerate.
Eric Botcazou [Thu, 14 Jul 2022 10:15:35 +0000 (12:15 +0200)]
Fix ICE on view conversion between struct and integer
This happens from prepare_gimple_addressable for the variable to be marked
with DECL_NOT_GIMPLE_REG_P when its initialization is gimplified, so it's
apparently just a matter of setting the flag earlier.
gcc/
* gimplify.cc (lookup_tmp_var): Add NOT_GIMPLE_REG boolean parameter
and set DECL_NOT_GIMPLE_REG_P on the variable according to it.
(internal_get_tmp_var): Add NOT_GIMPLE_REG boolean parameter and
pass it in the call to lookup_tmp_var.
(get_formal_tmp_var): Pass false in the call to lookup_tmp_var.
(get_initialized_tmp_var): Likewise.
(prepare_gimple_addressable): Call internal_get_tmp_var instead of
get_initialized_tmp_var with NOT_GIMPLE_REG set to true.
gcc/testsuite/
* gnat.dg/opt98.ads, gnat.dg/opt98.adb: New test.
Martin Liska [Thu, 14 Jul 2022 09:32:36 +0000 (11:32 +0200)]
libiberty: fix docs typo
libiberty/ChangeLog:
* functions.texi: Replace strtoul with strtoull.
Martin Liska [Thu, 14 Jul 2022 08:34:51 +0000 (10:34 +0200)]
docs: fix position of @end deftypefn
gcc/ChangeLog:
* doc/gimple.texi: Close properly a deftypefn.
Martin Liska [Thu, 14 Jul 2022 08:22:10 +0000 (10:22 +0200)]
docs: fix position of @end deftypefn
gcc/ChangeLog:
* doc/gimple.texi: Close properly a deftypefn.
Takayuki 'January June' Suwa [Wed, 13 Jul 2022 11:40:13 +0000 (20:40 +0900)]
xtensa: Minor fix for FP constant synthesis
This patch fixes an non-fatal issue about negative constant values derived
from FP constant synthesis on hosts whose 'long' is wider than 'int32_t'.
And also replaces the dedicated code in FP constant synthesis split
pattern with the appropriate existing function call.
gcc/ChangeLog:
* config/xtensa/xtensa.md:
In FP constant synthesis split pattern, subcontract to
avoid_constant_pool_reference() as in the case of integer,
because it can handle well too. And cast to int32_t before
calling xtensa_constantsynth() in order to ignore upper 32-bit.
gcc/testsuite/ChangeLog:
* gcc.target/xtensa/constsynth_double.c:
Modify in order to catch the issue.
GCC Administrator [Thu, 14 Jul 2022 00:16:48 +0000 (00:16 +0000)]
Daily bump.
Marek Polacek [Wed, 13 Jul 2022 00:18:56 +0000 (20:18 -0400)]
libcpp: Avoid pessimizing std::move [PR106272]
std::move in a return statement can prevent the NRVO:
<https://developers.redhat.com/blog/2019/04/12/understanding-when-not-to-stdmove-in-c>
PR106272 reports that we have two such cases in class label_text's
member functions. We have -Wpessimizing-move that's supposed to detect
problematic std::move uses, but in this case it didn't trigger. I've filed
PR106276 to track that.
PR preprocessor/106272
libcpp/ChangeLog:
* include/line-map.h (class label_text): Don't std::move in a return
statement.
Patrick Palka [Wed, 13 Jul 2022 18:02:08 +0000 (14:02 -0400)]
c++: non-dependent call to consteval operator [PR105912]
Here we're crashing when substituting a non-dependent call to a
consteval operator, whose CALL_EXPR_OPERATOR_SYNTAX flag we try to
propagate to the result, but the result isn't a CALL_EXPR since the
selected function is consteval. This patch fixes this by checking the
result of extract_call_expr accordingly. (Note that we can't check
DECL_IMMEDIATE_FUNCTION_P here because we don't know which function was
selected by overload resolution from here.)
PR c++/105912
gcc/cp/ChangeLog:
* pt.cc (tsubst_copy_and_build) <case CALL_EXPR>: Guard against
NULL_TREE extract_call_expr result.
gcc/testsuite/ChangeLog:
* g++.dg/cpp2a/consteval31.C: New test.
Patrick Palka [Wed, 13 Jul 2022 18:01:28 +0000 (14:01 -0400)]
c++: dependence of constrained memfn from current inst [PR105842]
Here we incorrectly deem the calls to func1, func2 and tmpl2 as
ambiguous ahead of time ultimately because we mishandle dependence
of a constrained member function from the current instantiation.
In type_dependent_expression_p, we already consider dependence of a
TEMPLATE_DECL's constraints (via uses_outer_template_parms), but
neglect to do the same for a FUNCTION_DECL (such as that for func1).
And in satisfy_declaration_constraints, we give up if _any_ template
argument is dependent, but for non-dependent member functions from
the current instantiation (such as func2 and tmpl2), we can and must
check constraints as long as the innermost arguments aren't dependent.
PR c++/105842
gcc/cp/ChangeLog:
* constraint.cc (satisfy_declaration_constraints): Refine early
exit test for argument dependence.
* cp-tree.h (uses_outer_template_parms_in_constraints): Declare.
* pt.cc (template_class_depth): Handle TI_TEMPLATE being a
FIELD_DECL.
(usse_outer_template_parms): Factor out constraint dependence
test into ...
(uses_outer_template_parms_in_constraints): ... here.
(type_dependent_expression_p): Use it for FUNCTION_DECL.
gcc/testsuite/ChangeLog:
* g++.dg/cpp2a/concepts-memtmpl6.C: New test.
Ian Lance Taylor [Wed, 13 Jul 2022 02:42:43 +0000 (19:42 -0700)]
libgo: don't include <linux/fs.h> when building gen-sysinfo.go
Removing this doesn't change anything at least with glibc 2.33.
The include was added in https://go.dev/cl/6100049 but it's not
clear why.
Fixes PR go/106266
Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/417294
Aldy Hernandez [Tue, 12 Jul 2022 07:37:13 +0000 (09:37 +0200)]
Use nonzero bits in range-ops to determine if < 0 is false.
For a signed integer, x < 0 is false if the sign bit in the nonzero
bits of X is clear.
Both CCP and ipa-cp can set the global nonzero bits in a range, which
means we can now use some of that information in evrp and subsequent
passes. I've adjusted two tests which now fold things earlier because
of this optimization.
Tested on x86-64 Linux.
gcc/ChangeLog:
* range-op.cc (operator_lt::fold_range): Use nonzero bits.
gcc/testsuite/ChangeLog:
* g++.dg/ipa/pure-const-3.C: Adjust.
* gcc.dg/pr102983.c: Adjust.
Aldy Hernandez [Wed, 13 Jul 2022 10:38:35 +0000 (12:38 +0200)]
Clear nonzero mask when inverting ranges.
Every time we set a range we should take into account the nonzero
mask. This happens automatically for the set() methods, plus all the
other assignment, intersect, and union methods. Unfortunately I
forgot about the invert code.
Also, for good measure I audited the rest of the setters in
value_range.cc and plugged the legacy code to pessimize the masks to
-1 for union/intersect, since we don't support the masks on them (or
rather, we don't keep very good track of them).
Tested on x86-64 Linux.
gcc/ChangeLog:
* value-range.cc (irange::copy_to_legacy): Set nonzero mask.
(irange::legacy_intersect): Clear nonzero mask.
(irange::legacy_union): Same.
(irange::invert): Same.
Richard Biener [Wed, 13 Jul 2022 11:52:59 +0000 (13:52 +0200)]
Speed up DOM record_temporary_equivalences
The following gets away computing a dominance bitmap when
fast queries are not available and we are doing
back_propagate_equivalences. The comuted bitmap can be
cheaply kept up-to-date during the domwalk since it is
simply the set of blocks on the domwalk stack.
Abstraction of the threading makes this somewhat awkward
but it also fulfills the fixme comment in only considering
equivalences in already (domwalk) visited blocks, even when
querying from the outgoing block of a forward thread. Maybe
that's not what is intended but at least we have no testsuite
coverage of such missed equivalences.
* tree-ssa-dom.h (record_temporary_equivalences): Remove.
* tree-ssa-dom.cc (dom_jt_state::m_blocks_on_stack): New.
(dom_jt_state::get_blocks_on_stack): Likewise.
(dom_opt_dom_walker::dom_opt_dom_walker): Take dom_jt_state.
(back_propagate_equivalences): Remove dominator bitmap
compute and instead use passed in m_blocks_on_stack.
(record_temporary_equivalences): Likewise.
(record_equivalences_from_incoming_edge): Likewise.
(dom_opt_dom_walker::before_dom_children): Maintain and
pass down blocks on stack.
(dom_opt_dom_walker::after_dom_children): Likewise.
Eric Botcazou [Sat, 9 Jul 2022 09:10:15 +0000 (11:10 +0200)]
[Ada] Small housekeeping work in gigi
gcc/ada/
* gcc-interface/trans.cc (gnat_to_gnu) <N_Assignment_Statement>: Fix
a couple of minor issues in the commentary.
Eric Botcazou [Tue, 28 Jun 2022 17:03:00 +0000 (19:03 +0200)]
[Ada] Extend No_Dependence restriction to code generation
This reports violations for 4 units from gigi.
gcc/ada/
* gcc-interface/trans.cc (gigi): Report a violation of No_Dependence
on System.Stack_Checking if Stack_Check_Probes_On_Target is not set
and -fstack-check is specified.
(build_binary_op_trapv): Report violatiosn of No_Dependence on both
System.Arith_64 and System.Arith_128.
(add_decl_expr): If an initialized variable, report a violation of
No_Dependence on System.Memory_Copy for large aggregate types.
(gnat_to_gnu) <N_Op_Eq>: Report a violation
of No_Dependence on System.Memory_Compare for large aggregate types.
<N_Assignment_Statement>! Report a violation of No_Dependence on
System.Memory_Set, System.Memory_Move or else System.Memory_Copy for
large aggregate types.
* gcc-interface/utils2.cc (maybe_wrap_malloc): Report a violation of
No_Dependence on System.Memory.
(maybe_wrap_free): Add GNAT_NODE parameter and report a violation of
No_Dependence on System.Memory.
(build_call_alloc_dealloc): Adjust call to maybe_wrap_free.
Eric Botcazou [Wed, 29 Jun 2022 19:44:35 +0000 (21:44 +0200)]
[Ada] Revert recent change in debug info for vector array types
It lost too much useful information.
gcc/ada/
* gcc-interface/decl.cc (gnat_to_gnu_entity): Do not set the debug
type for vector types.
Eric Botcazou [Mon, 27 Jun 2022 15:33:46 +0000 (17:33 +0200)]
[Ada] Undo questionable renaming in earlier change
gcc/ada/
* gcc-interface/decl.cc (gnat_to_gnu_entity) <E_Access_Subtype>:
Undo questionable renaming.
Eric Botcazou [Fri, 24 Jun 2022 17:28:53 +0000 (19:28 +0200)]
[Ada] Also deal with private actual types in latest change
gcc/ada/
* gcc-interface/decl.cc (Gigi_Cloned_Subtype): Handle private case.
Eric Botcazou [Fri, 24 Jun 2022 10:59:45 +0000 (12:59 +0200)]
[Ada] Adjust name of stack checking function
gcc/ada/
* gcc-interface/trans.cc (gigi): Add one more leading underscore to
name of stack checking function.
Eric Botcazou [Thu, 23 Jun 2022 21:50:18 +0000 (23:50 +0200)]
[Ada] Use actual types instead of formal types consistently in debug info
This makes sure that the objects present in instantiations always have the
actual type instead of a local variant of the formal type in the debugging
information generated by the compiler (this was already the case when the
actual type is a record, a protected or a task type).
gcc/ada/
* gcc-interface/decl.cc (Gigi_Cloned_Subtype): New function.
(gnat_to_gnu_entity) <E_Signed_Integer_Subtype>: Call it to get the
cloned subtype, if any.
<E_Floating_Point_Subtype>: Likewise.
<E_Array_Subtype>: Likewise.
<E_Record_Subtype>: Likewise.
<E_Access_Subtype>: Likewise.
Deal with all cloned subtypes on the main path.
Eric Botcazou [Thu, 23 Jun 2022 15:13:57 +0000 (17:13 +0200)]
[Ada] Generate debug info entry for user-defined access subtype
This is consistent with the other kinds of subtypes.
gcc/ada/
* gcc-interface/decl.cc (gnat_to_gnu_entity) <E_Access_Subtype>: Do
not reuse the TYPE_DECL of the base type.
Eric Botcazou [Wed, 22 Jun 2022 18:38:15 +0000 (20:38 +0200)]
[Ada] Do not generate DW_TAG_typedef for constrained array types
It no longer serves any useful purpose at this point.
gcc/ada/
* gcc-interface/utils.cc (gnat_pushdecl): Build DECL_ORIGINAL_TYPE
only for pointer types.
Eric Botcazou [Wed, 22 Jun 2022 18:20:06 +0000 (20:20 +0200)]
[Ada] Fix internal error on comparison with access function parameter
It comes from an overzealous assertion.
gcc/ada/
* gcc-interface/utils2.cc (build_binary_op) <EQ_EXPR>: Also accept
pointer-to-function types that are not variant of each other.
Eric Botcazou [Wed, 22 Jun 2022 18:13:20 +0000 (20:13 +0200)]
[Ada] Fix internal error on instance of Ada.Task_Attributes at -O
This happens when there is a size mismatch, but this must be accepted.
gcc/ada/
* gcc-interface/utils.cc (unchecked_convert): Also pad in most cases
if the source is not a scalar type but the destination is.
Eric Botcazou [Mon, 20 Jun 2022 22:50:54 +0000 (00:50 +0200)]
[Ada] Fix wrong access check with access-to-unconstrained-array
The current implementation may create dangling references from a superset
of the alias set of the dummy pointer-to-array type when it exists.
gcc/ada/
* gcc-interface/decl.cc (gnat_to_gnu_entity) <E_Array_Type>: Save
and restore the alias set of the dummy pointer-to-array type.
Eric Botcazou [Sun, 10 Jul 2022 17:10:48 +0000 (19:10 +0200)]
[Ada] Extend No_Dependence restriction to code generation (continued)
gcc/ada/
* snames.ads-tmpl (Name_Memory_Compare): New package name.
(Name_Memory_Copy): Likewise.
(Name_Memory_Move): Likewise.
(Name_Memory_Set): Likewise.
Gary Dismukes [Sat, 9 Jul 2022 23:16:51 +0000 (19:16 -0400)]
[Ada] Fix for bootstrap problem with calling function System.Case_Util.To_Mixed
gcc/ada/
* sem_ch13.adb (Check_And_Resolve_Storage_Model_Type_Argument):
Call the System.Case_Util.To_Mixed procedure rather than the
function, to avoid bootstrap problems.
Gary Dismukes [Thu, 7 Jul 2022 19:29:21 +0000 (15:29 -0400)]
[Ada] Add support for defaulted Storage_Model_Type aspect and subaspects
The compiler currently rejects a Storage_Model_Type aspect that is not
specified with an aggregate, or that has an aggregate that does not
specify all defined "subaspects" (Address_Type, Null_Address, Allocate,
etc.). The RFC for this feature defines the aspect to fully default to
the native memory model when no aggregate is given, and also allows any
subaspects to be specified and others to default in the case where the
address type is the native address type (System.Address), whether that
address type is explicitly specified or defaulted. This set of changes
now supports that defaulting semantics. Note that the subaspect
retrieval functions in Sem_Util.Storage_Model_Support (which are called
by the compiler back ends) will now return Empty for any subprogram
subaspects (Allocate, Deallocate, etc.) that are defaulted in the aspect
(that is, in the native model case where the address type is
System.Address). Also in the native case, retrieval of defaulted
subaspects Address_Type and Null_Address will return the entities for
System.Address and System.Null_Address, respectively. Additionally,
error checks for multiple associations given for the same subaspect are
now done.
gcc/ada/
* aspects.ads (Aspect_Argument): Change the association for
Aspect_Storage_Model_Type from Expression to
Optional_Expression.
* exp_util.ads (Find_Storage_Op): Update comment to indicate
that Empty can be returned in the case where a storage-model
operation is defaulted.
* exp_util.adb (Find_Storage_Op): Allow the function to return
Empty in Storage_Model_Type case rather than raising
Program_Error, so that Procedure_To_Call fields in N_Allocator
and N_Free_Statement nodes will be set to Empty in the defaulted
native storage-model case.
* sem_ch13.adb: Add with and use of System.Case_Util (and
reformat context_clause).
(Check_Aspect_At_Freeze_Point): Return with no action for a
Storage_Model_Type aspect with no expression (fully-defaulted
native memory-model case).
(Resolve_Storage_Model_Type_Argument): If an Address_Type has
not been explicitly specified, then set Addr_Type to denote type
System.Address.
(Validate_Storage_Model_Type_Aspect): Return immediately in the
case where the aspect has no Expression (fully-defaulted native
memory-model case). No longer issue an error when Address_Type
isn't specified, and instead use type System.Address as the
default address type. When the address type is
System.Address (whether specified or defaulted), no longer issue
errors for any other "subaspects" that aren't specified, since
in that case those are allowed to default as well. Remove ???
comment about needing to check for duplicates, which is now
addressed.
(Check_And_Resolve_Storage_Model_Type_Argument): New procedure
to check that an association for a storage-model subaspect in
the aggregate has not been specified earlier in the aggregate,
and to then resolve the expression of the association and save
the resolved entity. Called by
Validate_Storage_Model_Type_Aspect.
* sem_util.ads (Storage_Model_Support): Update comments on specs
of the functions Get_Storage_Model_Type_Entity,
Storage_Model_Address_Type, and Storage_Model_Null_Address to
indicate the behavior when the address type is System.Address
(the native memory-model case).
* sem_util.adb
(Storage_Model_Support.Get_Storage_Model_Type_Entity): Suppress
the search for the given subaspect name (Nam) when the
Storage_Model_Type aspect is fully defaulted (i.e., no
Expression is present) and simply return. In cases where the
search is done, but no association that matches Nam is found,
return System.Address for the Name_Address_Type case, return
System.Null_Address for the Name_Null_Address case, and return
Empty for all other cases.
Piotr Trojanek [Thu, 7 Jul 2022 22:05:36 +0000 (00:05 +0200)]
[Ada] Fix for visibility of aspect expressions inside generic units
When a generic unit contains references to global entities (i.e.
entities declared outside of this generic unit), those references are
saved: from the analyzed copy of a generic unit (which is then
discarded) into a generic template (which is then instantiated, possibly
many times). To save those references we maintain an association from
nodes in the generic template to nodes in the analyzed copy. However,
this association breaks when analysis of the generic copy calls
Relocate_Node, which conceptually only moves the node, while in fact it
creates a copy with a new Node_Id.
In particular, this association was broken by calls to Relocate_Node
that happen when transforming various aspects into corresponding pragmas
or attribute definition clases. For the most common Pre and Post aspects
this was fixed years ago by not using Relocate_Node and simply sharing
the tree. This patch extends this fix to other aspects, in particular
those that allow non-static expressions.
gcc/ada/
* sem_ch13.adb (Relocate_Expression): New routine with code that
previously was only applied to Pre and Post aspects.
(Analyze_Aspect_Specifications): Apply the above routine to
other aspects, in particular to aspects Address, Attach_Handler,
Predicate and Interrupt_Priority.
Piotr Trojanek [Wed, 6 Jul 2022 07:37:15 +0000 (09:37 +0200)]
[Ada] Handle bodies-to-inline just like generic templates
Originally bodies-to-inline created for the frontend inlining were
analyzed with expansion disabled. Then, to facilitate inlining in
GNATprove mode, the analysis was changed to preanalysis.
However, preanalysis in this context works badly for calls in prefix
notation, because preanalysis assigns entities and types to nodes but
doesn't convert calls from prefix to ordinary notation. When the
body-to-inline is actually inlined, the (re)analysis of calls in prefix
notation fails.
The proper solution is rather to handle bodies-to-inline just like
generic templates.
From the user point of view, this patch fixes spurious errors both in
GNATprove (which uses frontend inlining by default) and in GNAT (where
frontend inlining is typically explicitly requested with -gnatN and
pragma Inline_Always).
gcc/ada/
* inline.adb (Build_Body_To_Inline): Instead of manipulating the
Full_Analysis flag, use the Inside_A_Generic flag (which is
conveniently manipulated by Start_Generic/End_Generic, together
with Expander_Active).
* sem_attr.adb (Analyze_Attribute_Old_Result): Adapt comment and
assertion to different flag that is set while building
body-to-inline.
Alexandre Oliva [Thu, 7 Jul 2022 11:55:24 +0000 (08:55 -0300)]
[Ada] Clarify hardening command-line options that require explicit choices
Prefixes -fzero-call-used-regs and -fstrub could be mistaken for full
command-line options with the references to them in the GNAT RM. Make
it clearer that they require explicit choices.
gcc/ada/
* doc/gnat_rm/security_hardening_features.rst: Clarify the need
for choices after -fzero-call-used-regs and -fstrub.
* gnat_rm.texi: Regenerate.
Yannick Moy [Tue, 5 Jul 2022 10:51:25 +0000 (12:51 +0200)]
[Ada] Fix incorrect handling of Ghost aspect
When a formal generic type is marked as Ghost, the instantiation of that
generic will contain a generic subtype for the actual with the Ghost
pragma. Recognize this case.
gcc/ada/
* sem_prag.adb (Analyze_Pragma): Recognize a generated subtype
with Ghost pragma for generic instantiations.
Yannick Moy [Thu, 7 Jul 2022 09:38:42 +0000 (09:38 +0000)]
[Ada] Fix proof of runtime unit System.Arith_64
After changes in provers and Why3, changes are needed to recover
automatic proof of System.Arith_64. This is the first part of it.
gcc/ada/
* libgnat/s-aridou.adb (Lemma_Mult_Div, Lemma_Powers): New
lemmas.
(Prove_Sign_Quotient): New local lemma.
(Prove_Signs): Expand definition of Big_R and Big_Q in the
postcondition. Add intermediate assertions.
(Double_Divide): Call new lemma.
(Lemma_Div_Eq): Provide body for proving lemma.
(Lemma_Powers_Of_2, Lemma_Shift_Without_Drop,
Prove_Dividend_Scaling, Prove_Multiplication, Prove_Z_Low): Call
lemmas, add intermediate assertions.
Piotr Trojanek [Tue, 5 Jul 2022 21:41:43 +0000 (23:41 +0200)]
[Ada] Fix crash on frontend inlining of functions with single returns
When examining expression of the first declaration of the inlined body
make sure that this declaration is in fact an object declaration.
gcc/ada/
* inline.adb (Has_Single_Return): Add guard for the subsequent
call to Expression.
Eric Botcazou [Sun, 3 Jul 2022 16:41:56 +0000 (18:41 +0200)]
[Ada] Plug legality loophole for equality operator of untagged record types
In Ada 2012, the RM 4.5.2(9.8) clause prevents an equality operator for an
untagged record type from being declared after the type is frozen. While
the clause is implemented in GNAT, the implementation has a loophole which
lets subprogram bodies that are not the completion of a declaration pass
the check without being flagged.
gcc/ada/
* sem_ch6.adb (Analyze_Subprogram_Body_Helper): Set Acts_As_Spec
earlier if the body is not the completion of a declaration.
(Check_Untagged_Equality): Deal with subprogram bodies that are
not the completion of a declaration and make sure that they are
not flagged when they cause the freezing of the type themselves.
Give a warning on the freezing point of the type in more cases.
* sem_res.adb (Resolve_Equality_Op): Revert latest change.
Yannick Moy [Mon, 4 Jul 2022 10:49:02 +0000 (10:49 +0000)]
[Ada] Fix automatic proof on System.Arith_32
gcc/ada/
* libgnat/s-arit32.adb (Scaled_Divide32): Add an assertion, move
the call of Prove_Sign_R around.
Marc Poulhiès [Thu, 30 Jun 2022 11:35:10 +0000 (13:35 +0200)]
[Ada] Fix if expression returning slice
The compiler incorrectly assumed the prefix for a slice returned in one
branch of an if expression has its bounds known at compile time and would
crash when this is not true.
gcc/ada/
* exp_ch4.adb (Expand_N_If_Expression): Test for compile time
known bounds when handling slices.
Eric Botcazou [Fri, 1 Jul 2022 13:24:48 +0000 (15:24 +0200)]
[Ada] Add cross-references between Integer_Type_For and Small_Integer_Type_For
gcc/ada/
* exp_util.ads (Integer_Type_For): Mention Small_Integer_Type_For.
(Small_Integer_Type_For): Mention Integer_Type_For.
Eric Botcazou [Fri, 1 Jul 2022 08:47:36 +0000 (10:47 +0200)]
[Ada] Fix internal error on untagged record type with equality operator
After the binding interpretation issued under AI12-0413, a user-defined
primitive equality operator of an untagged record type hides the predefined
equality operator in an instantiation, but this does not apply if the
instantiation appears in the same declarative region as the type and
before the declaration of this user-defined operator.
gcc/ada/
* sem_res.adb (Resolve_Equality_Op): Make sure that the user-defined
operator of an untagged record type is declared ahead of an instance
before using it to resolve the equality operator in the instance.
Justin Squirek [Thu, 30 Jun 2022 16:20:52 +0000 (16:20 +0000)]
[Ada] Fix CodePeer warnings in GNAT sources
This patch fixes various redundant constructs or uninitialized variables
identified by CodePeer in the GNAT frontend and runtime sources.
gcc/ada/
* exp_ch6.adb (Expand_N_Extended_Return_Statement): Add default
initialization for Stmts.
* sem_ch12.adb (Analyze_Associations): Add default
initialization for Match.
* libgnat/a-ztenau.adb (Scan_Enum_Lit): Remove duplicated
boolean test.
* libgnat/g-spipat.adb (XMatch): Combine duplicated cases.
Piotr Trojanek [Wed, 29 Jun 2022 20:30:39 +0000 (22:30 +0200)]
[Ada] Refine type for checking number of pragma arguments
Code cleanup.
gcc/ada/
* par-prag.adb (Check_Arg_Count): Change parameter type from Int
to Nat, because this parameter is compared to Arg_Count variable
which is of type Nat. Also, it wouldn't make sense to check for
negative number of pragma arguments.
Andrew Carlotti [Wed, 13 Jul 2022 08:01:51 +0000 (09:01 +0100)]
aarch64: Don't return invalid GIMPLE assign statements
aarch64_general_gimple_fold_builtin doesn't check whether the LHS of a
function call is null before converting it to an assign statement. To avoid
returning an invalid GIMPLE statement in this case, we instead assign the
expression result to a new (unused) variable.
This change only affects code that:
1) Calls an intrinsic function that has no side effects;
2) Does not use or store the value returned by the intrinsic;
3) Uses parameters that prevent the front-end eliminating the call prior to
gimplification.
The ICE is unlikely to have occurred in the wild, as it relies on the presence
of a redundant intrinsic call.
gcc/ChangeLog:
* config/aarch64/aarch64-builtins.cc
(aarch64_general_gimple_fold_builtin): Add fixup for invalid GIMPLE.
gcc/testsuite/ChangeLog:
* gcc.target/aarch64/advsimd-intrinsics/ignored_return_1.c: New test.
Richard Biener [Wed, 13 Jul 2022 06:27:57 +0000 (08:27 +0200)]
tree-optimization/106249 - unroll-and-jam and LC SSA upate
When I delayed the LC SSA update in unroll-and-jam this exposed
an issue that tree_transform_and_unroll_loop does a full function
LC SSA verification when new_loop is NULL (when it doesn't need to
do versioning). That wasn't intended. I also took the chance
to make the versioning in tree_transform_and_unroll_loop use
TODO_update_ssa_nophi for the loop versioning SSA update which
I somehow missed earlier.
PR tree-optimization/106249
* tree-ssa-loop-manip.cc (tree_transform_and_unroll_loop):
Only verify LC SSA of the new_loop if we created it.
Use TODO_update_ssa_nophi for the SSA update after versioning
the loop.
* gcc.dg/pr106249.c: New testcase.
GCC Administrator [Wed, 13 Jul 2022 00:16:33 +0000 (00:16 +0000)]
Daily bump.
Jonathan Wakely [Tue, 12 Jul 2022 10:18:47 +0000 (11:18 +0100)]
libstdc++: Check for EOF if extraction avoids buffer overflow [PR106248]
In r11-2581-g17abcc77341584 (for LWG 2499) I added overflow checks to
the pre-C++20 operator>>(istream&, char*) overload. Those checks can
cause extraction to stop after filling the buffer, where previously it
would have tried to extract another character and stopped at EOF. When
that happens we no longer set eofbit in the stream state, which is
consistent with the behaviour of the new C++20 overload, but is an
observable and unexpected change in the C++17 behaviour. What makes it
worse is that the behaviour change is dependent on optimization, because
__builtin_object_size is used to detect the buffer size and that only
works when optimizing.
To avoid the unexpected and optimization-dependent change in behaviour,
set eofbit manually if we stopped extracting because of the buffer size
check, but had reached EOF anyway. If the stream's rdstate() != goodbit
or width() is non-zero and smaller than the buffer, there's nothing to
do. Otherwise, we filled the buffer and need to check for EOF, and maybe
set eofbit.
The new check is guarded by #ifdef __OPTIMIZE__ because otherwise
__builtin_object_size is useless. There's no point compiling and
emitting dead code that can't be eliminated because we're not
optimizing.
We could add extra checks that the next character in the buffer is not
whitespace, to detect the case where we stopped early and prevented a
buffer overflow that would have happened otherwise. That would allow us
to assert or set badbit in the stream state when undefined behaviour was
prevented. However, those extra checks would increase the size of the
function, potentially reducing the likelihood of it being inlined, and
so making the buffer size detection less reliable. It seems preferable
to prevent UB and silently truncate, rather than miss the UB and allow
the overflow to happen.
libstdc++-v3/ChangeLog:
PR libstdc++/106248
* include/std/istream [C++17] (operator>>(istream&, char*)):
Set eofbit if we stopped extracting at EOF.
* testsuite/27_io/basic_istream/extractors_character/char/pr106248.cc:
New test.
* testsuite/27_io/basic_istream/extractors_character/wchar_t/pr106248.cc:
New test.
Harald Anlauf [Tue, 5 Jul 2022 20:20:05 +0000 (22:20 +0200)]
Fortran: error recovery simplifying PACK with invalid arguments [PR106049]
gcc/fortran/ChangeLog:
PR fortran/106049
* simplify.cc (is_constant_array_expr): A non-zero-sized constant
array shall have a non-empty constructor. When the constructor is
empty or missing, treat as non-constant.
gcc/testsuite/ChangeLog:
PR fortran/106049
* gfortran.dg/pack_simplify_1.f90: New test.
Aldy Hernandez [Tue, 12 Jul 2022 08:16:03 +0000 (10:16 +0200)]
Set nonzero bits from bitwise and operator in range-ops.
Now that nonzero bits are first class citizens in the range, we can
keep better track of them in range-ops, especially the bitwise and
operator.
This patch sets the nonzero mask for the trivial case. In doing so,
I've removed some old dead code that was an attempt to keep better
track of masks.
I'm sure there are tons of optimizations throughout range-ops that
could be implemented, especially the op1_range methods, but those
always make my head hurt. I'll leave them to the smarter hackers
out there.
I've removed the restriction that nonzero bits can't be queried from
legacy. This was causing special casing all over the place, and
it's not like we can generate incorrect code. We just silently
drop nonzero bits to -1 in some of the legacy code. The end result
is that VRP1, and other users of legacy, may not benefit from these
improvements.
Tested and benchmarked on x86-64 Linux.
gcc/ChangeLog:
* range-op.cc (unsigned_singleton_p): Remove.
(operator_bitwise_and::remove_impossible_ranges): Remove.
(operator_bitwise_and::fold_range): Set nonzero bits. *
* value-range.cc (irange::get_nonzero_bits): Remove
legacy_mode_p assert.
(irange::dump_bitmasks): Remove legacy_mode_p check.
Martin Liska [Mon, 16 May 2022 12:01:52 +0000 (14:01 +0200)]
lto-plugin: implement LDPT_GET_API_VERSION
include/ChangeLog:
* plugin-api.h (enum linker_api_version): New enum.
(ld_plugin_get_api_version): New.
(enum ld_plugin_tag): Add LDPT_GET_API_VERSION.
(struct ld_plugin_tv): Add tv_get_api_version.
lto-plugin/ChangeLog:
* lto-plugin.c (negotiate_api_version): New.
(onload): Negotiate API version.
* Makefile.am: Add -DBASE_VERSION.
* Makefile.in: Regenerate.
Richard Sandiford [Tue, 12 Jul 2022 13:09:44 +0000 (14:09 +0100)]
Add internal functions for iround etc. [PR106253]
The PR is about the aarch64 port using an ACLE built-in function
to vectorise a scalar function call, even though the ECF_* flags for
the ACLE function didn't match the ECF_* flags for the scalar call.
To some extent that kind of difference is inevitable, since the
ACLE intrinsics are supposed to follow the behaviour of the
underlying instruction as closely as possible. Also, using
target-specific builtins has the drawback of limiting further
gimple optimisation, since the gimple optimisers won't know what
the function does.
We handle several other maths functions, including round, floor
and ceil, by defining directly-mapped internal functions that
are linked to the associated built-in functions. This has two
main advantages:
- it means that, internally, we are not restricted to the set of
scalar types that happen to have associated C/C++ functions
- the functions (and thus the underlying optabs) extend naturally
to vectors
This patch takes the same approach for the remaining functions
handled by aarch64_builtin_vectorized_function.
gcc/
PR target/106253
* predict.h (insn_optimization_type): Declare.
* predict.cc (insn_optimization_type): New function.
* internal-fn.def (IFN_ICEIL, IFN_IFLOOR, IFN_IRINT, IFN_IROUND)
(IFN_LCEIL, IFN_LFLOOR, IFN_LRINT, IFN_LROUND, IFN_LLCEIL)
(IFN_LLFLOOR, IFN_LLRINT, IFN_LLROUND): New internal functions.
* internal-fn.cc (unary_convert_direct): New macro.
(expand_convert_optab_fn): New function.
(expand_unary_convert_optab_fn): New macro.
(direct_unary_convert_optab_supported_p): Likewise.
* optabs.cc (expand_sfix_optab): Pass insn_optimization_type to
convert_optab_handler.
* config/aarch64/aarch64-protos.h
(aarch64_builtin_vectorized_function): Delete.
* config/aarch64/aarch64-builtins.cc
(aarch64_builtin_vectorized_function): Delete.
* config/aarch64/aarch64.cc
(TARGET_VECTORIZE_BUILTIN_VECTORIZED_FUNCTION): Delete.
* config/i386/i386.cc (ix86_optab_supported_p): Handle lround_optab.
* config/i386/i386.md (lround<X87MODEF:mode><SWI248x:mode>2): Remove
optimize_insn_for_size_p test.
gcc/testsuite/
PR target/106253
* gcc.target/aarch64/vect_unary_1.c: Add tests for iroundf,
llround, iceilf, llceil, ifloorf, llfloor, irintf and llrint.
* gfortran.dg/vect/pr106253.f: New test.
Richard Biener [Tue, 12 Jul 2022 12:37:51 +0000 (14:37 +0200)]
Remove create_lcssa_for_virtual_phi and uses
The following expands the comment in vect_do_peeling as to why we
do not need create_lcssa_for_virtual_phi and removes that function.
That's the last bit I have queued for the vectorizer virtual LCSSA
cleanup.
* tree-vect-loop-manip.cc (create_lcssa_for_virtual_phi):
Remove.
(vect_do_peeling): Do not call it, adjust comment.
Piotr Trojanek [Thu, 30 Jun 2022 10:40:39 +0000 (12:40 +0200)]
[Ada] Fix inconsistent comment about expansion of exception declarations
Code cleanup.
gcc/ada/
* exp_ch11.adb (Expand_N_Exception_Declaration): Sync comment
with declaration in System.Standard_Library.
Marc Poulhiès [Thu, 30 Jun 2022 07:50:02 +0000 (09:50 +0200)]
[Ada] Fix 0-sized secondary stack allocations
The Has_Enough_Free_Memory was not correctly reporting a completely full
chunk in the case of a 0-sized allocation.
gcc/ada/
* libgnat/s-secsta.adb (Has_Enough_Free_Memory): Check for full
chunk before computing the available size.
Steve Baird [Thu, 30 Jun 2022 00:21:03 +0000 (17:21 -0700)]
[Ada] Use right implementation type for nonbinary-modulus ops
If the flag Opt.Expand_Nonbinary_Modular_Ops is set (which occurs if
-gnateg is specified) then we implement predefined operations for a
modular type whose modulus is not a power of two by converting the
operands to some other type (either a signed integer type or a modular
type with a power-of-two modulus), doing the operation in that
representation, and converting back. If the bounds of the chosen type
are too narrow, then problems with intermediate overflow can result. But
there are performance advantages to choosing narrower bounds (and to
prefering an unsigned choice over a signed choice of the same size) when
multiple safe choices are available.
gcc/ada/
* exp_ch4.adb (Expand_Nonbinary_Modular_Op.Expand_Modular_Op):
Reimplement choice of which predefined type to use for the
implementation of a predefined operation of a modular type with
a non-power-of-two modulus.
Justin Squirek [Wed, 15 Jun 2022 01:53:49 +0000 (01:53 +0000)]
[Ada] Spurious use_type clause warning
This patch corrects an error in the compiler whereby a spurious
redundant use_type_clause warning gets issued when the clause appears in
the context_clause of a package preceding a with_clause for a package
with an identical use_clause in its specification.
gcc/ada/
* einfo.ads: Modify documentation for In_Use flag to include
scope stack manipulation.
* sem_ch8.adb (Use_One_Type): Add condition to return when
attempting to detect redundant use_type_clauses in child units
in certain cases.
Eric Botcazou [Tue, 28 Jun 2022 16:51:30 +0000 (18:51 +0200)]
[Ada] Extend No_Dependence restriction to code generation
This makes it possible to report violations of the No_Dependence restriction
during code generation, in other words outside of the Ada front-end proper.
These violations are supposed to be only for child units of System, so the
implementation is restricted to these cases.
gcc/ada/
* restrict.ads (type ND_Entry): Add System_Child component.
(Check_Restriction_No_Dependence_On_System): Declare.
* restrict.adb (Global_Restriction_No_Tasking): Move around.
(Violation_Of_No_Dependence): New procedure.
(Check_Restriction_No_Dependence): Call Violation_Of_No_Dependence
to report a violation.
(Check_Restriction_No_Dependence_On_System): New procedure.
(Set_Restriction_No_Dependenc): Set System_Child component if the
unit is a child of System.
* snames.ads-tmpl (Name_Arith_64): New package name.
(Name_Arith_128): Likewise.
(Name_Memory): Likewise.
(Name_Stack_Checking): Likewise.
* fe.h (Check_Restriction_No_Dependence_On_System): Declare.
Bob Duff [Wed, 29 Jun 2022 21:06:47 +0000 (17:06 -0400)]
[Ada] Ada 2020: Allow declarative items mixed with statements
This patch implements a syntactic language extension that allows
declarative items to appear in a sequence of statements. For example:
for X in S'Range loop
Item : Character renames S (X);
Item := Transform (Item);
end loop;
Previously, declare/begin/end was required, which is just noise.
gcc/ada/
* par.adb (P_Declarative_Items): New function to parse a
sequence of declarative items.
(P_Sequence_Of_Statements): Add Handled flag, to indicate
whether to wrap the result in a block statement.
* par-ch3.adb (P_Declarative_Item): Rename P_Declarative_Items
to be P_Declarative_Item, because it really only parses a single
declarative item, and to avoid conflict with the new
P_Declarative_Items. Add In_Statements. We keep the old
error-recovery mechanisms in place when In_Statements is False.
When True, we don't want to complain about statements, because
we are parsing a sequence of statements.
(P_Identifier_Declarations): If In_Statements, and we see what
looks like a statement, we no longer give an error. We return to
P_Sequence_Of_Statements with Done = True, so it can parse the
statement.
* par-ch5.adb (P_Sequence_Of_Statements): Call
P_Declarative_Items to parse declarative items that appear in
the statement list. Remove error handling code that complained
about such items. Check some errors conservatively. Wrap the
result in a block statement when necessary.
* par-ch11.adb (P_Handled_Sequence_Of_Statements): Pass
Handled => True to P_Sequence_Of_Statements.
* types.ads (No, Present): New functions for querying
Source_Ptrs (equal, not equal No_Location).
Piotr Trojanek [Fri, 24 Jun 2022 07:07:51 +0000 (09:07 +0200)]
[Ada] Don't check for misspelling of Not_A_Restriction_Id
When looking for a misspelling of a restriction identifier we should
ignore the Not_A_Restriction_Id literal, because it doesn't represent
any restriction.
gcc/ada/
* sem_prag.adb (Process_Restrictions_Or_Restriction_Warnings):
Fix range of iteration.
Piotr Trojanek [Thu, 23 Jun 2022 11:09:51 +0000 (13:09 +0200)]
[Ada] Fix confusing error expression on an unknown restriction
When pragma Restriction is used with an unknown restriction identifier,
it is better to not process the restriction expression, as it will
likely produce confusing error message.
In particular, an odd message appeared when there was a typo in the
restriction identifier whose expression requires special processing
(e.g. No_Dependence_On instead of No_Dependence).
gcc/ada/
* sem_prag.adb (Process_Restrictions_Or_Restriction_Warnings):
Do not process expression of unknown restrictions.
Vasiliy Fofanov [Tue, 28 Jun 2022 15:50:38 +0000 (17:50 +0200)]
[Ada] Make it clear that gnatmake passes the ball to gprbuild if -P is set
Also move -P switch description to the top of the switches list.
gcc/ada/
* makeusg.adb,
doc/gnat_ugn/building_executable_programs_with_gnat.rst: Move -P
to the top of switches list and make it clear that gnatmake
passes the ball to gprbuild if -P is set.
* gnat_ugn.texi: Regenerate.
Bob Duff [Tue, 28 Jun 2022 12:28:12 +0000 (08:28 -0400)]
[Ada] Suppress warning in g-socthi__vxworks.adb
Follow-on to previous change, which missed the vxworks version of this
package.
gcc/ada/
* libgnat/g-socthi__vxworks.adb (C_Connect): Suppress new warning.
Piotr Trojanek [Tue, 11 Jan 2022 19:41:13 +0000 (20:41 +0100)]
[Ada] Simplify rewriting of attributes into Boolean literals
Code cleanup; semantics is unaffected.
gcc/ada/
* sem_attr.adb (Set_Boolean_Result): Simplify using
Boolean_Literals.
Yannick Moy [Wed, 8 Jun 2022 09:58:43 +0000 (11:58 +0200)]
[Ada] Ignore switches for controlling frontend warnings in GNATprove mode
In the special mode for GNATprove, ignore switches controlling frontend
warnings, like already done for the control of style checks warnings.
Also remove special handling of warning mode in Errout to make up for
the previous division of control between -gnatw (GNAT) and --warnings
(GNATprove).
gcc/ada/
* errout.adb (Record_Compilation_Errors): Remove global
variable.
(Compilation_Errors): Simplify.
(Initialize): Inline Reset_Warnings.
(Reset_Warnings): Remove.
* errout.ads (Reset_Warnings): Remove.
(Compilation_Errors): Update comment.
* gnat1drv.adb (Adjust_Global_Switches): Ignore all frontend
warnings in GNATprove mode, except regarding elaboration and
suspicious contracts.
Eric Botcazou [Mon, 27 Jun 2022 13:26:34 +0000 (15:26 +0200)]
[Ada] Do not create large objects for indefinite protected types
This plugs a small loophole in the Needs_Secondary_Stack predicate for
some protected types and record types containing protected components.
gcc/ada/
* sem_util.adb (Caller_Known_Size_Record): Make entry assertion
more robust and add guard for null argument. For protected
types, invoke Caller_Known_Size_Record on
Corresponding_Record_Type.
(Needs_Secondary_Stack): Likewise.
Doug Rupp [Fri, 17 Jun 2022 18:39:46 +0000 (11:39 -0700)]
[Ada] Vxworks7* - Makefile.rtl rtp vs rtp-smp cleanup - remove unused files
Only smp runtimes are built for vxworks7*, even though the -smp suffix
is removed during install. This change removes unused system packages
for rtp runtimes.
gcc/ada/
* libgnat/system-vxworks7-ppc-rtp.ads: Remove
* libgnat/system-vxworks7-x86-rtp.ads: Likewise.
Piotr Trojanek [Mon, 27 Jun 2022 11:09:10 +0000 (13:09 +0200)]
[Ada] Fix spurious warning on unreferenced internal generic instance
This patch removes a spurious warning, saying that an internal entity of
a generic formal package is unreferenced. The immediate cause of this
warning is that the internal entity is explicitly flagged as coming from
source.
The explicit flagging was added decades ago to fix a missing
cross-reference in the ALI file. Apparently these days the
cross-references work fine without this flag.
gcc/ada/
* sem_ch12.adb (Analyze_Package_Instantiation): Remove dubious
call to Set_Comes_From_Source.
Bob Duff [Fri, 24 Jun 2022 18:25:48 +0000 (14:25 -0400)]
[Ada] Refine heuristics for unreachable-code warnings
This patch refines the heuristics for when we warn about unreachable
code, to avoid common false alarms.
gcc/ada/
* sem_ch5.adb (Check_Unreachable_Code): Refine heuristics.
* sem_util.ads, sem_util.adb (Is_Static_Constant_Name): Remove
this; instead we have a new function Is_Simple_Case in
Sem_Ch5.Check_Unreachable_Code.
Bob Duff [Thu, 23 Jun 2022 16:29:22 +0000 (12:29 -0400)]
[Ada] Remove out-of-range warning in unreachable code
This patch removes a warning in examples like this:
if cond then
return; -- or other jump
end if;
X := ...; -- where the value is out of range
where cond is known at compile time. It could, for example, be a generic
formal parameter that is known to be True in some instances.
As a side effect, this patch adds new warnings about unreachable code.
gcc/ada/
* gnatls.adb (Output_License_Information): Remove pragma
No_Return; call sites deal with Exit_Program.
* libgnat/g-socthi.adb (C_Connect): Suppress warning about
unreachable code.
* sem_ch5.adb (Check_Unreachable_Code): Special-case if
statements with static conditions. If we remove unreachable
code (including the return statement) from a function, add
"raise Program_Error", so we won't warn about missing returns.
Remove Original_Node in test for N_Raise_Statement; it's not
needed. Remove test for CodePeer_Mode; if Operating_Mode =
Generate_Code, then CodePeer_Mode can't be True. Misc cleanup.
Do not reuse Nxt variable for unrelated purpose (the usage in
the Kill_Dead_Code loop is entirely local to the loop).
* sem_ch6.adb: Add check for Is_Transfer. Misc cleanup.
* sem_prag.adb: Minor.
* sem_res.adb: Minor.
* sem_util.adb: Minor cleanup.
(Is_Trivial_Boolean): Move to nonnested place, so it can be
called from elsewhere.
(Is_Static_Constant_Boolean): New function.
* sem_util.ads (Is_Trivial_Boolean): Export.
(Is_Static_Constant_Boolean): New function.
Eric Botcazou [Fri, 24 Jun 2022 10:16:21 +0000 (12:16 +0200)]
[Ada] Add one more leading underscore to couple of exported symbols
For the sake of consistency with other runtime units.
gcc/ada/
* libgnat/s-stchop.ads: Use a double underscore prefix for symbols.
Ed Schonberg [Tue, 7 Jun 2022 20:22:04 +0000 (13:22 -0700)]
[Ada] Proper freezing for dispatching expression functions.
In the case of an expression function that is a primitive function of a
tagged type, freezing the tagged type needs to freeze the function (and
its return expression). A bug in this area could result in incorrect
behavior both at compile time and at run time. At compile time, freezing
rule violations could go undetected so that an illegal program could be
incorrectly accepted. At run time, a dispatching call to the primitive
function could end up dispatching through a not-yet-initialized slot in
the dispatch table, typically (although not always) resulting in a
segmentation fault.
gcc/ada/
* freeze.adb (Check_Expression_Function.Find_Constant): Add a
check that a type that is referenced as the prefix of an
attribute is fully declared.
(Freeze_And_Append): Do not freeze the profile when freezing an
expression function.
(Freeze_Entity): When a tagged type is frozen, also freeze any
primitive operations of the type that are expression functions.
* sem_ch6.adb (Analyze_Subprogram_Body_Helper): Do not prevent
freezing associated with an expression function body if the
function is a dispatching op.
Piotr Trojanek [Tue, 21 Jun 2022 08:17:57 +0000 (10:17 +0200)]
[Ada] Warn on unset objects in packages with no bodies
Fix an inconsistency, where GNAT was warning about references to unset
objects inside generic packages with no bodies but not inside ordinary
packages with no bodies.
gcc/ada/
* sem_ch7.adb (Analyze_Package_Declaration): Check references to
unset objects.
gcc/testsuite/
* gnat.dg/specs/discr5.ads: Expect new warnings.
* gnat.dg/specs/empty_variants.ads: Likewise.
* gnat.dg/specs/pack13.ads: Likewise.
Piotr Trojanek [Tue, 11 Jan 2022 21:25:13 +0000 (22:25 +0100)]
[Ada] Accept aspect Yield on subprogram bodies acting as specs
A small fix for the aspect Yield defined in AI12-0279 for Ada 2022, to
accept aspect given for a subprogram body which acts as its own spec.
For example:
procedure Switch with Yield => True is
begin
...
end Switch;
gcc/ada/
* sem_ch13.adb (Analyze_Aspect_Yield): Look at the entity kind,
not at the declaration kind.
Joffrey Huguet [Mon, 13 Jun 2022 09:44:51 +0000 (11:44 +0200)]
[Ada] Annotate libraries with returning annotation
This patch annotates SPARK-annotated libraries with returning
annotations (Always_Return, Might_Not_Return) to remove the warnings
raised by GNATprove about missing annotations.
gcc/ada/
* libgnarl/a-reatim.ads, libgnat/a-cfdlli.ads,
libgnat/a-cfhama.ads, libgnat/a-cfhase.ads,
libgnat/a-cfinse.ads, libgnat/a-cfinve.ads,
libgnat/a-cforma.ads, libgnat/a-cforse.ads,
libgnat/a-chahan.ads, libgnat/a-cofove.ads,
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libgnat/interfac__2020.ads, libgnat/s-atacco.ads,
libgnat/s-stoele.ads: Annotate packages and subprograms with
returning annotations.
Eric Botcazou [Tue, 21 Jun 2022 20:17:13 +0000 (22:17 +0200)]
[Ada] Fix buffer overrun for small string concatenation at -O0
The concatenation routines may read too much data on the source side when
the destination buffer is larger than the final result. This change makes
sure that this does not happen any more and also removes obsolete stuff.
gcc/ada/
* rtsfind.ads (RE_Id): Remove RE_Str_Concat_Bounds_N values.
(RE_Unit_Table): Remove RE_Str_Concat_Bounds_N entries.
* libgnat/s-conca2.ads (Str_Concat_2): Adjust head comment.
(Str_Concat_Bounds_2): Delete.
* libgnat/s-conca2.adb (Str_Concat_2): Use the length of the last
input to size the last assignment.
(Str_Concat_Bounds_2): Delete.
* libgnat/s-conca3.ads (Str_Concat_3): Adjust head comment.
(Str_Concat_Bounds_3): Delete.
* libgnat/s-conca3.adb (Str_Concat_3): Use the length of the last
input to size the last assignment.
(Str_Concat_Bounds_3): Delete.
* libgnat/s-conca4.ads (Str_Concat_4): Adjust head comment.
(Str_Concat_Bounds_4): Delete.
* libgnat/s-conca4.adb (Str_Concat_4): Use the length of the last
input to size the last assignment.
(Str_Concat_Bounds_4): Delete.
* libgnat/s-conca5.ads (Str_Concat_5): Adjust head comment.
(Str_Concat_Bounds_5): Delete.
* libgnat/s-conca5.adb (Str_Concat_5): Use the length of the last
input to size the last assignment.
(Str_Concat_Bounds_5): Delete.
* libgnat/s-conca6.ads (Str_Concat_6): Adjust head comment.
(Str_Concat_Bounds_6): Delete.
* libgnat/s-conca6.adb (Str_Concat_6): Use the length of the last
input to size the last assignment.
(Str_Concat_Bounds_6): Delete.
* libgnat/s-conca7.ads (Str_Concat_7): Adjust head comment.
(Str_Concat_Bounds_7): Delete.
* libgnat/s-conca7.adb (Str_Concat_7): Use the length of the last
input to size the last assignment.
(Str_Concat_Bounds_7): Delete.
* libgnat/s-conca8.ads (Str_Concat_8): Adjust head comment.
(Str_Concat_Bounds_8): Delete.
* libgnat/s-conca8.adb (Str_Concat_8): Use the length of the last
input to size the last assignment.
(Str_Concat_Bounds_8): Delete.
* libgnat/s-conca9.ads (Str_Concat_9): Adjust head comment.
(Str_Concat_Bounds_9): Delete.
* libgnat/s-conca9.adb (Str_Concat_9): Use the length of the last
input to size the last assignment.
(Str_Concat_Bounds_9): Delete.
Bob Duff [Tue, 21 Jun 2022 18:32:37 +0000 (14:32 -0400)]
[Ada] Avoid namespace pollution for Next and Previous
This patch renames Next and Previous in a-convec.ads and other
containers to be _Next and _Previous, to avoid namespace pollution. The
compiler now uses the leading-underscore names to look them up.
The scanner is changed to allow this.
gcc/ada/
* exp_ch5.adb (Expand_Iterator_Loop_Over_Array): Use _Next and
_Previous in the optimized expansion of "for ... of". No longer
need to check parameter profiles for these, because the
leading-underscore names are unique.
* libgnat/a-convec.ads (_Next, _Previous): Renamings of Next and
Previous, to avoid namespace pollution.
* libgnat/a-cbdlli.ads, libgnat/a-cbhama.ads,
libgnat/a-cbhase.ads, libgnat/a-cbmutr.ads,
libgnat/a-cborma.ads, libgnat/a-cborse.ads,
libgnat/a-cdlili.ads, libgnat/a-cidlli.ads,
libgnat/a-cihama.ads, libgnat/a-cihase.ads,
libgnat/a-cimutr.ads, libgnat/a-ciorma.ads,
libgnat/a-ciorse.ads, libgnat/a-cobove.ads,
libgnat/a-cohama.ads, libgnat/a-cohase.ads,
libgnat/a-coinve.ads, libgnat/a-comutr.ads,
libgnat/a-coorma.ads, libgnat/a-coorse.ads: Likewise. Also,
remove duplicated comments -- refer to one comment about _Next,
_Previous, Pseudo_Reference in libgnat/a-convec.ads. DRY.
* scng.adb (Scan): Allow leading underscores in identifiers in
the run-time library.
* snames.ads-tmpl (Name_uNext, Name_uPrevious): New names with
leading underscores.
Piotr Trojanek [Fri, 3 Jun 2022 13:18:24 +0000 (15:18 +0200)]
[Ada] Warn about unreachable code after calls with No_Return
GNAT was already warning about unreachable code after raise/goto/exit
statements, but not after calls to procedures with No_Return. Now this
warning is extended.
Also, previously the warning was suppressed for unreachable RETURN after
RAISE statements. Now this suppression is narrowed to functions, because
only in function such a RETURN statement might be indeed needed (where
it is the only RETURN statement of a function).
gcc/ada/
* sem_ch5.adb (Check_Unreachable_Code): Extend suppression to
calls with No_Return aspect, but narrow it to functions.
* sem_res.adb (Resolve_Call): Warn about unreachable code after
calls with No_Return.
Bob Duff [Tue, 21 Jun 2022 13:50:06 +0000 (09:50 -0400)]
[Ada] Clean up scanner
This patch removes some obsolete code in the scanner and related files,
and corrects some comments. Tok_Special is used only by the
preprocessor, and uses only the two characters '#' and '$'.
It might be simpler to have a single flag indicating we're scanning for
preprocessing, instead of the Special_Characters array and the
End_Of_Line_Is_Token flag, but that's for another day.
gcc/ada/
* scans.ads: Fix obsolete comments about Tok_Special, and give
Special_Character a predicate assuring it is one of the two
characters used in preprocessing.
* scng.ads: Clean up comments.
* scng.adb: Clean up handling of Tok_Special. Remove comment
about '@' (target_name), which doesn't seem very helpful.
Set_Special_Character will now blow up if given anything other
than '#' and '$', because of the predicate on Special_Character;
it's not clear why it used to say "when others => null;".
Remove Comment_Is_Token, which is not used.
* scn.ads: Remove commented-out use clause. Remove redundant
comment.
* ali-util.adb: Use "is null" for do-nothing procedures.
* gprep.adb (Post_Scan): Use "is null".
Bob Duff [Mon, 20 Jun 2022 17:59:03 +0000 (13:59 -0400)]
[Ada] Ignore exceptions in task termination handlers
This patch fixes a bug in which if the environment task has a specific
termination handler, and that handler raises an exception, the handler
is called recursively, causing infinite recursion. The RM requires such
exceptions to be ignored.
gcc/ada/
* libgnarl/s-solita.adb (Task_Termination_Handler_T): Ignore all
exceptions propagated by Specific_Handler.
* libgnarl/s-tassta.adb, libgnarl/s-taskin.ads: Minor.
Marc Poulhiès [Fri, 17 Jun 2022 14:07:35 +0000 (16:07 +0200)]
[Ada] Fix missing Overflow and Range checks
While doing Preanalysis (as is the case during ghost code handling),
some range and/or overflow checks can be saved (see Saved_Checks in
checks.adb) and later one omitted as they would be redundant (see
Find_Check in checks.adb). In the case of ghost code, the node being
Preanalyzed is a temporary copy that is discarded, so its corresponding
check is not expanded later. The node that gets expanded later is not
having any checks expanded as it is wrongly assumed it has already been
done before.
As is already the case in Preanalyze_And_Resolve, this change suppresses
all checks during Preanalyze except for GNATprove mode.
gcc/ada/
* sem.adb (Preanalyze): Suppress checks when not in GNATprove
mode.
* sem_res.adb (Preanalyze_And_Resolve): Add cross reference in
comment to above procedure.
* sinfo.ads: Typo fix in comment.
Julien Bortolussi [Thu, 19 May 2022 13:49:03 +0000 (15:49 +0200)]
[Ada] Add new unbounded and indefinite formal doubly linked list
Before this patch, the only formal doubly linked lists were bounded and
definite. This means that it is necessary to provide their maximum
length or capacity at instantiation and that they can only be used with
definite element types.
The formal lists added by this patch are unbounded and indefinite.
Their length grows dynamically until Count_Type'Last. This makes them
easier to use but requires the use of dynamic allocation and controlled
types.
gcc/ada/
* libgnat/a-cfidll.adb, libgnat/a-cfidll.ads: Implementation
files of the formal unbounded indefinite list.
* Makefile.rtl, impunit.adb: Take into account the add of the
new files.
Piotr Trojanek [Mon, 30 Aug 2021 10:03:52 +0000 (12:03 +0200)]
[Ada] Remove excessive guard in detection of access-to-variable objects
It is safe to call Is_Access_Variable without calling
Is_Access_Object_Type before. Compiler cleanup only; semantics is
unaffected.
gcc/ada/
* sem_util.adb (Is_Variable): Remove excessive guard.
Richard Sandiford [Tue, 12 Jul 2022 11:59:25 +0000 (12:59 +0100)]
aarch64: Remove redundant builtins code
aarch64_builtin_vectorized_function handles some built-in functions
that already have equivalent internal functions. This seems to be
redundant now, since the target builtins that it chooses are mapped
to the same optab patterns as the internal functions.
gcc/
* config/aarch64/aarch64-builtins.cc
(aarch64_builtin_vectorized_function): Remove handling of
floor, ceil, trunc, round, nearbyint, sqrt, clz and ctz.
gcc/testsuite/
* gcc.target/aarch64/vect_unary_1.c: New test.
Alexandre Oliva [Tue, 12 Jul 2022 11:52:24 +0000 (08:52 -0300)]
i386 testsuite: cope with --enable-default-pie
Running the testsuite on a toolchain build with --enable-default-pie
had some unexpected fails. Adjust the tests to tolerate the effects
of this configuration option on x86_64-linux-gnu and i686-linux-gnu.
The cet-sjlj* tests get offsets before the base symbol name with PIC
or PIE. A single pattern covering both alternatives somehow triggered
two matches rather than the single expected match, thus my narrowing
the '.*' to not skip line breaks, but that was not enough. Still
puzzled, I separated the patterns into nonpic and !nonpic, and we get
the expected matchcounts this way.
Tests for -mfentry require an mfentry effective target, which excludes
32-bit x86 with PIC or PIE enabled, that's why the patterns that
accept the PIC sym@RELOC annotations only cover x86_64. mvc7 is
getting regexps extended to cover PIC reloc annotatios and all of the
named variants, and tightened to avoid unexpected '.' matches.
The pr24414 test stores in an unadorned named variable in an old-style
asm statement, to check that such asm statements get an implicit
memory clobber. Rewriting the asm into a GCC extended asm with the
variable as an output would remove the regression it checks against.
Problem is, the literal reference to the variable is not PIC, so it's
rejected by the elf64 linker with an error, and flagged with a warning
by the elf32 one. We could presumably make the variable references
PIC-friendly with #ifdefs, but I doubt that's worth the trouble. I'm
just arranging for the test to be skipped if PIC or PIE are enabled by
default.
for gcc/testsuite/ChangeLog
* gcc.target/i386/cet-sjlj-6a.c: Cope with --enable-default-pie.
* gcc.target/i386/cet-sjlj-6b.c: Likewise.
* gcc.target/i386/fentryname3.c: Likewise.
* gcc.target/i386/mvc7.c: Likewise.
* gcc.target/i386/pr24414.c: Likewise.
* gcc.target/i386/pr93492-3.c: Likewise.
* gcc.target/i386/pr93492-5.c: Likewise.
* gcc.target/i386/pr98482-1.c: Likewise.
Tobias Burnus [Tue, 12 Jul 2022 09:10:50 +0000 (11:10 +0200)]
libgomp: Add tailing \n to gomp_debug
Contrary to gomp_{error,warning,fatal}, no tailing '\n' is added with
gomp_debug; only affected was a 'requires'-related output.
libgomp/ChangeLog:
* target.c (gomp_target_init): Added tailing '\n' to gomp_debug.
Jonathan Wakely [Thu, 7 Jul 2022 11:27:08 +0000 (12:27 +0100)]
libstdc++: Prefer const T to std::add_const_t<T>
For any typedef-name or template parameter, T, add_const_t<T> is
equivalent to T const, so we can avoid instantiating the std::add_const
class template and just say T const (or const T).
This isn't true for a non-typedef like int&, where int& const would be
ill-formed, but we shouldn't be using add_const_t<int&> anyway, because
we know what that type is.
The only place we need to continue using std::add_const is in the
std::bind implementation where it's used as a template template
parameter to be applied as a metafunction elsewhere.
libstdc++-v3/ChangeLog:
* include/bits/stl_iterator.h (__iter_to_alloc_t): Replace
add_const_t with const-qualifier.
* include/bits/utility.h (tuple_element<N, cv T>): Likewise for
all cv-qualifiers.
* include/std/type_traits (add_const, add_volatile): Replace
typedef-declaration with using-declaration.
(add_cv): Replace add_const and add_volatile with cv-qualifiers.
* include/std/variant (variant_alternative<N, cv T>): Replace
add_const_t, add_volatile_t and add_cv_t etc. with cv-qualifiers.
Thomas Schwinge [Tue, 12 Jul 2022 06:17:37 +0000 (08:17 +0200)]
XFAIL 'offloading_enabled' diagnostics issue in 'libgomp.oacc-c-c++-common/reduction-5.c' [PR101551]
Fix-up for recent commit
06b2a2abe26554c6f9365676683d67368cbba206
"Enhance '_Pragma' diagnostics verification in OMP C/C++ test cases".
Supposedly it's the same issue as in
<https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101551#c2>, where I'd
noted that:
| [...] with an offloading-enabled build of GCC we're losing
| "note: in expansion of macro '[...]'" diagnostics.
| (Effectively '-ftrack-macro-expansion=0'?)
PR middle-end/101551
libgomp/
* testsuite/libgomp.oacc-c-c++-common/reduction-5.c: XFAIL
'offloading_enabled' diagnostics issue.
GCC Administrator [Tue, 12 Jul 2022 00:16:27 +0000 (00:16 +0000)]
Daily bump.
Martin Liska [Mon, 11 Jul 2022 20:03:14 +0000 (22:03 +0200)]
libsanitizer: cherry-pick
9cf13067cb5088626ba7 from upstream
9cf13067cb5088626ba7ee1ec4c42ec59c7995a0 [sanitizer] Remove #include <linux/fs.h> to resolve fsconfig_command/mount_attr conflict with glibc 2.36
Andrew MacLeod [Fri, 8 Jul 2022 17:30:49 +0000 (13:30 -0400)]
Avoid calling range_from_dom when dominator is already resolved.
range_from_dom makes a recursive call to resolve the immediate dominator
when there are multiple incoming edges to a block. This is not necessary
when the dominator already has an on-entry cache value.
PR tree-optimization/106234
* gimple-range-cache.cc (ranger_cache::range_from_dom): Check dominator
cache value before recursively resolving it.
Roger Sayle [Mon, 11 Jul 2022 15:04:46 +0000 (16:04 +0100)]
Improved Scalar-To-Vector (STV) support for TImode to V1TImode on x86_64.
This patch upgrades x86_64's scalar-to-vector (STV) pass to more
aggressively transform 128-bit scalar TImode operations into vector
V1TImode operations performed on SSE registers. TImode functionality
already exists in STV, but only for move operations. This change
brings support for logical operations (AND, IOR, XOR, NOT and ANDN)
and comparisons.
The effect of these changes are conveniently demonstrated by the new
sse4_1-stv-5.c test case:
__int128 a[16];
__int128 b[16];
__int128 c[16];
void foo()
{
for (unsigned int i=0; i<16; i++)
a[i] = b[i] & ~c[i];
}
which when currently compiled on mainline wtih -O2 -msse4 produces:
foo: xorl %eax, %eax
.L2: movq c(%rax), %rsi
movq c+8(%rax), %rdi
addq $16, %rax
notq %rsi
notq %rdi
andq b-16(%rax), %rsi
andq b-8(%rax), %rdi
movq %rsi, a-16(%rax)
movq %rdi, a-8(%rax)
cmpq $256, %rax
jne .L2
ret
but with this patch now produces:
foo: xorl %eax, %eax
.L2: movdqa c(%rax), %xmm0
pandn b(%rax), %xmm0
addq $16, %rax
movaps %xmm0, a-16(%rax)
cmpq $256, %rax
jne .L2
ret
Technically, the STV pass is implemented by three C++ classes, a common
abstract base class "scalar_chain" that contains common functionality,
and two derived classes: general_scalar_chain (which handles SI and
DI modes) and timode_scalar_chain (which handles TI modes). As
mentioned previously, because only TI mode moves were handled the
two worker classes behaved significantly differently. These changes
bring the functionality of these two classes closer together, which
is reflected by refactoring more shared code from general_scalar_chain
to the parent scalar_chain and reusing it from timode_scalar_chain.
There still remain significant differences (and simplifications) so
the existing division of classes (as specializations) continues to
make sense.
2022-07-11 Roger Sayle <roger@nextmovesoftware.com>
gcc/ChangeLog
* config/i386/i386-features.h (scalar_chain): Add fields
insns_conv, n_sse_to_integer and n_integer_to_sse to this
parent class, moved from general_scalar_chain.
(scalar_chain::convert_compare): Protected method moved
from general_scalar_chain.
(mark_dual_mode_def): Make protected, not private virtual.
(scalar_chain:convert_op): New private virtual method.
(general_scalar_chain::general_scalar_chain): Simplify constructor.
(general_scalar_chain::~general_scalar_chain): Delete destructor.
(general_scalar_chain): Move insns_conv, n_sse_to_integer and
n_integer_to_sse fields to parent class, scalar_chain.
(general_scalar_chain::mark_dual_mode_def): Delete prototype.
(general_scalar_chain::convert_compare): Delete prototype.
(timode_scalar_chain::compute_convert_gain): Remove simplistic
implementation, convert to a method prototype.
(timode_scalar_chain::mark_dual_mode_def): Delete prototype.
(timode_scalar_chain::convert_op): Prototype new virtual method.
* config/i386/i386-features.cc (scalar_chain::scalar_chain):
Allocate insns_conv and initialize n_sse_to_integer and
n_integer_to_sse fields in constructor.
(scalar_chain::scalar_chain): Free insns_conv in destructor.
(general_scalar_chain::general_scalar_chain): Delete
constructor, now defined in the class declaration.
(general_scalar_chain::~general_scalar_chain): Delete destructor.
(scalar_chain::mark_dual_mode_def): Renamed from
general_scalar_chain::mark_dual_mode_def.
(timode_scalar_chain::mark_dual_mode_def): Delete.
(scalar_chain::convert_compare): Renamed from
general_scalar_chain::convert_compare.
(timode_scalar_chain::compute_convert_gain): New method to
determine the gain from converting a TImode chain to V1TImode.
(timode_scalar_chain::convert_op): New method to convert an
operand from TImode to V1TImode.
(timode_scalar_chain::convert_insn) <case REG>: Only PUT_MODE
on REG_EQUAL notes that were originally TImode (not CONST_INT).
Handle AND, ANDN, XOR, IOR, NOT and COMPARE.
(timode_mem_p): Helper predicate to check where operand is
memory reference with sufficient alignment for TImode STV.
(timode_scalar_to_vector_candidate_p): Use convertible_comparison_p
to check whether COMPARE is convertible. Handle SET_DESTs that
that are REG_P or MEM_P and SET_SRCs that are REG, CONST_INT,
CONST_WIDE_INT, MEM, AND, ANDN, IOR, XOR or NOT.
gcc/testsuite/ChangeLog
* gcc.target/i386/sse4_1-stv-2.c: New test case, pand.
* gcc.target/i386/sse4_1-stv-3.c: New test case, por.
* gcc.target/i386/sse4_1-stv-4.c: New test case, pxor.
* gcc.target/i386/sse4_1-stv-5.c: New test case, pandn.
* gcc.target/i386/sse4_1-stv-6.c: New test case, ptest.
Richard Sandiford [Mon, 11 Jul 2022 14:59:00 +0000 (15:59 +0100)]
vect: Restore optab_vector argument [PR106250]
In g:
76c3041b856cb0 I'd removed a "C ? optab_vector : optab_mixed_sign"
argument from a call to directly_supported_p, thinking that the argument
only existed because of the condition (which I was removing). But the
difference between the scalar and vector forms matters for shifts,
so we do still need the argument.
gcc/
PR tree-optimization/106250
* tree-vect-loop.cc (vectorizable_reduction): Reinstate final
argument to directly_supported_p.
Lewis Hyatt [Mon, 11 Jul 2022 12:12:33 +0000 (08:12 -0400)]
c-family: Fix option check in handle_pragma_diagnostic [PR106252]
In r13-1544, handle_pragma_diagnostic was refactored to support processing
early pragmas. During that process the part looking up option arguments was
inadvertenly moved too early, prior to checking the option was valid, causing
PR106252. Fixed by moving the check back where it goes.
gcc/c-family/ChangeLog:
PR preprocessor/106252
* c-pragma.cc (handle_pragma_diagnostic_impl): Don't look up the
option argument prior to verifying the option was found.
Richard Biener [Mon, 11 Jul 2022 10:17:40 +0000 (12:17 +0200)]
More update-ssa speedup
When working on a smaller region like a loop version copy the main
time spent is now dominance fast query recompute which does a full
function DFS walk. The dominance queries within the region of
interest should be O(log n) without fast queries and we should do
on the order of O(n) of them which overall means reasonable
complexity.
For the artificial testcase I'm looking at this shaves off
considerable time again.
* tree-into-ssa.cc (update_ssa): Do not forcefully
re-compute dominance fast queries for TODO_update_ssa_no_phi.
Richard Biener [Mon, 11 Jul 2022 10:07:05 +0000 (12:07 +0200)]
tree-optimization/106228 - fixup last change
The following fixes the last commit to honor the case we are not
vectorizing a loop.
PR tree-optimization/106228
* tree-vect-data-refs.cc (vect_setup_realignment): Adjust
VUSE compute for the non-loop case.
Richard Biener [Thu, 7 Jul 2022 13:23:28 +0000 (15:23 +0200)]
More update-ssa speedup
When we do TODO_update_ssa_no_phi we already avoid computing
dominance frontiers for all blocks - it is worth to also avoid
walking all dominated blocks in the update domwalk and restrict
the walk to the SEME region with the affected blocks. We can
do that by walking the CFG in reverse from blocks_to_update to
the common immediate dominator, marking blocks in the region
and telling the domwalk to STOP when leaving it.
For an artificial testcase with N adjacent loops with one
unswitching opportunity that takes the incremental SSA updating
off the -ftime-report radar:
tree loop unswitching : 11.25 ( 3%) 0.09 ( 5%) 11.53 ( 3%) 36M ( 9%)
`- tree SSA incremental : 35.74 ( 9%) 0.07 ( 4%) 36.65 ( 9%) 2734k ( 1%)
improves to
tree loop unswitching : 10.21 ( 3%) 0.05 ( 3%) 11.50 ( 3%) 36M ( 9%)
`- tree SSA incremental : 0.66 ( 0%) 0.02 ( 1%) 0.49 ( 0%) 2734k ( 1%)
for less localized updates the SEME region isn't likely constrained
enough so I've restricted the extra work to TODO_update_ssa_no_phi
callers.
* tree-into-ssa.cc (rewrite_mode::REWRITE_UPDATE_REGION): New.
(rewrite_update_dom_walker::rewrite_update_dom_walker): Update.
(rewrite_update_dom_walker::m_in_region_flag): New.
(rewrite_update_dom_walker::before_dom_children): If the region
to update is marked, STOP at exits.
(rewrite_blocks): For REWRITE_UPDATE_REGION mark the region
to be updated.
(dump_update_ssa): Use bitmap_empty_p.
(update_ssa): Likewise. Use REWRITE_UPDATE_REGION when
TODO_update_ssa_no_phi.
* tree-cfgcleanup.cc (cleanup_tree_cfg_noloop): Account
pending update_ssa to the caller.