For conditional reductions, the "then" value needs to be the candidate
value calculated by this iteration while the "else" value needs to be
the result carried over from previous iterations.  If the COND_EXPR
is the other way around, we need to swap it.

2019-09-19  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
	* tree-vectorizer.h (vectorizable_condition): Take an int
	reduction index instead of a boolean flag.
	* tree-vect-stmts.c (vectorizable_condition): Likewise.
	Swap the "then" and "else" values for EXTRACT_LAST_REDUCTION
	reductions if the reduction accumulator is the "then" rather
	than the "else" value.
	(vect_analyze_stmt): Update call accordingly.
	(vect_transform_stmt): Likewise.
	* tree-vect-loop.c (vectorizable_reduction): Likewise,
	asserting that the index is > 0.

From-SVN: r275962

2019-09-19  Martin Liska  <mliska@suse.cz>

	* ipa-icf.c (sort_sem_items_by_decl_uid): Simplify comparator.
	(sort_congruence_classes_by_decl_uid): Likewise.
	(sort_congruence_class_groups_by_decl_uid): Use std::pair for
	easier sorting.
	(sem_item_optimizer::merge_classes): Likewise.

From-SVN: r275961

2019-09-19  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/91812
	* tree-ssa-phiprop.c (propagate_with_phi): Do not replace
	volatile loads.

	* gcc.dg/torture/pr91812.c: New testcase.

From-SVN: r275960

This patch rewrites the way simplify_subreg handles constants.
It uses similar native_encode/native_decode routines to the
tree-level handling of VIEW_CONVERT_EXPR, meaning that we can
move between rtx constants and the target memory image of them.

The main point of this patch is to support subregs of constant-length
vectors for VLA vectors, beyond the very simple cases that were already
handled.  Many of the new tests failed before the patch for variable-
length vectors.

The boolean side is tested more by the upcoming SVE ACLE work.

2019-09-19  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
	* defaults.h (TARGET_UNIT): New macro.
	(target_unit): New type.
	* rtl.h (native_encode_rtx, native_decode_rtx)
	(native_decode_vector_rtx, subreg_size_lsb): Declare.
	(subreg_lsb_1): Turn into an inline wrapper around subreg_size_lsb.
	* rtlanal.c (subreg_lsb_1): Delete.
	(subreg_size_lsb): New function.
	* simplify-rtx.c: Include rtx-vector-builder.h
	(simplify_immed_subreg): Delete.
	(native_encode_rtx, native_decode_vector_rtx, native_decode_rtx)
	(simplify_const_vector_byte_offset, simplify_const_vector_subreg): New
	functions.
	(simplify_subreg): Use them.
	(test_vector_subregs_modes, test_vector_subregs_repeating)
	(test_vector_subregs_fore_back, test_vector_subregs_stepped)
	(test_vector_subregs): New functions.
	(test_vector_ops): Call test_vector_subregs for integer vector
	modes with at least 2 elements.

From-SVN: r275959

Emit DW_AT_GNU_bias with -fgnat-encodings=gdb.  gdb implements this,
but not the encoded variant.

2019-09-19  Tom Tromey  <tromey@adacore.com>

gcc/ada/

	* gcc-interface/misc.c (gnat_get_type_bias): Return the bias
	when -fgnat-encodings=gdb.

gcc/testsuite/

	* gnat.dg/bias1.adb: New testcase.

From-SVN: r275958

In cases where pragma Annotate accepts a string literal as an argument,
we now also accept a concatenation of string literals.

2019-09-19  Steve Baird  <baird@adacore.com>

gcc/ada/

	* sem_prag.adb (Preferred_String_Type): A new function. Given an
	expression, determines whether the preference rules defined for
	the third-and-later arguments of pragma Annotate suffice to
	determine the type of the expression. If so, then the preferred
	type is returned; if not then Empty is returned. Handles
	concatenations.
	(Analyze_Pragma): Replace previous code, which dealt only with
	string literals, with calls to the new Preferred_String_Type
	function, which also handles concatenations.
	* doc/gnat_rm/implementation_defined_pragmas.rst: Update
	documentation for pragma Annotate.
	* gnat_rm.texi: Regenerate.

gcc/testsuite/

	* gnat.dg/annotation1.adb: New testcase.

From-SVN: r275957

This fixes a recent code quality regression for targets that do not
require the strict alignment of memory accesses: the compiler would
generate a useless temporary for a slice of an array component in an
overaligned record type.

Running these commands:

  gcc -c p.adb -gnatws -gnatD
  grep loop p.adb.dg

On the following sources:

procedure P (N : Positive) is

  type Rec1 is record
    I : Integer;
  end record;

  type Arr is array (Positive range <>) of Rec1;

  type Rec2 is record
    A : Arr (1 .. 128);
  end record;
  for Rec2'Alignment use 8;

  procedure Proc (A : Arr) is
  begin
    null;
  end;

  R : Rec2;

begin
  Proc (R.A (1 .. N));
end;

Should execute silently.

2019-09-19  Eric Botcazou  <ebotcazou@adacore.com>

gcc/ada/

	* exp_util.adb (Is_Possibly_Unaligned_Slice): Do not return true
	on pure alignment considerations if the target does not require
	the strict alignment of memory accesses.

From-SVN: r275956

2019-09-19  Eric Botcazou  <ebotcazou@adacore.com>

gcc/ada/

	* sem_ch12.adb (Check_Private_View): Add a comment to indicate
	future work.

From-SVN: r275955

This prevents the object code from reading too many bytes from the
source for a copy operation involving a private discriminated record
type with default discriminants and generated for the assignment of an
aggregate to a variable or the initialization of a constant.

The front-end already knows that it needs to convert the operation
involving the aggregate into individual assignments if the type of the
aggregate has mutable components, but it would not do so if this type is
private, which does not change anything for code generation.

Running these commands:

  gnatmake -q p -g -fsanitize=address
  p

On the following sources:

with Q; use Q;

procedure P is

   type Rec is record
      A : T;
   end record;

   C : constant Rec := Rec'(A => Default_T);

begin
   null;
end;

package Q is

   type T is private;

   Default_T : constant T;

private

   A : constant := 170;
   B : constant := 8192;

   type A_Index is range 1 .. A;
   type B_Index is range 1 .. B;

   type A_Array is array (A_Index) of Boolean;
   type B_Array is array (B_Index) of Boolean;

   type Data_Type is (A_Type, B_Type);

   type T (Discriminant : Data_Type := A_Type) is record
      case Discriminant is
         when A_Type =>
            Field_A : A_Array;
         when B_Type =>
            Field_B : B_Array;
      end case;
   end record;

   Default_T : constant T :=
     T'(Discriminant => A_Type, Field_A => (others => True));

end Q;

Should execute silently.

2019-09-19  Eric Botcazou  <ebotcazou@adacore.com>

gcc/ada/

	* exp_aggr.adb (Has_Mutable_Components): Look at the underlying
	type of components to find out whether they are mutable.

From-SVN: r275954

This prevents the compiler from issuing a bogus error about a constant
whose full declaration appears too late, if it is declared in a nested
generic package and instantiated in another nested instantiation, when
the instantiations are done in a unit withed from the main unit and
containing an inlined subprogram, and cross-unit inlining is enabled.

It turns out that, under these very peculiar conditions, the compiler
ends up instantiating the body of the generic package twice, which leads
to various semantic errors, in particular for declarations of constants.

2019-09-19  Eric Botcazou  <ebotcazou@adacore.com>

gcc/ada/

	* sem_ch12.adb (Instantiate_Package_Body): Check that the body
	has not already been instantiated when the body of the parent
	was being loaded.

gcc/testsuite/

	* gnat.dg/inline21.adb, gnat.dg/inline21_g.ads,
	gnat.dg/inline21_h.adb, gnat.dg/inline21_h.ads,
	gnat.dg/inline21_q.ads: New testcase.

From-SVN: r275953

This prevents the compiler from issuing a bogus error about the
visibility of an operator in an instantiation of a nested generic
package which is itself used as an actual of an instantiation of another
generic package, when the instantiations are done in a unit withed from
the main unit and containing an inlined subprogram, and cross-unit
inlining is enabled.

In most cases, the compiler does not check the visibility of operators
in an instantiation context because this has already been done when the
generic package has been analyzed. However, there are exceptions like
the actuals of an instantiation of a generic child unit which is done
as a compilation unit and the In_Instance predicate has a special check
for these cases.

This check would incorrectly trigger here and needs to be tightened.

2019-09-19  Eric Botcazou  <ebotcazou@adacore.com>

gcc/ada/

	* sem_util.adb (In_Instance): Test whether the current unit has
	been analyzed instead of being on the scope stack to detect the
	case of actuals of an instantiation of a generic child unit done
	as a compilation unit.

gcc/testsuite/

	* gnat.dg/inline20.adb, gnat.dg/inline20_g.adb,
	gnat.dg/inline20_g.ads, gnat.dg/inline20_h.ads,
	gnat.dg/inline20_i.ads, gnat.dg/inline20_q-io.ads,
	gnat.dg/inline20_q.ads, gnat.dg/inline20_r.ads: New testcase.

From-SVN: r275952

New routine to create 2 connected sockets. This routine is analog of the
UNIX system call socketpair. On UNIX platforms it is implemented on the
base of socketpair. On other platforms it is implemented by conecting
network sockets over loopback interface.

2019-09-19  Dmitriy Anisimkov  <anisimko@adacore.com>

gcc/ada/

	* libgnat/g-socket.ads, libgnat/g-socket.adb
	(Create_Socket_Pair): New routine.
	* libgnat/g-socthi.ads (OS_Has_Socketpair): Boolean constant.
	(C_Socketpair): New imported routine.
	* libgnat/g-socthi__mingw.ads, libgnat/g-socthi__vxworks.ads
	(Default_Socket_Pair_Family): New constant.
	(C_Socketpair): New routine.
	* libgnat/g-socthi__mingw.adb, libgnat/g-socthi__vxworks.adb
	(C_Socketpair): Is separated in anouther file.
	* libgnat/g-sthcso.adb (C_Socketpair): Non UNIX implementation.
	* libgnat/g-stsifd__sockets.adb: Reuse C_Socketpair.

From-SVN: r275951

A constant of pointer type is considered as mutable in SPARK, according
to SPARK RM 3.10, but this should be based on the declared type of the
constant instead of its underlying type.

There is no impact on compilation hence no test.

2019-09-19  Yannick Moy  <moy@adacore.com>

gcc/ada/

	* sem_prag.adb (Analyze_Depends_In_Decl_Part): Simplify previous
	test.

From-SVN: r275950

2019-09-19  Ed Schonberg  <schonberg@adacore.com>

gcc/ada/

	* sem_ch7.adb (Install_Parent_Private_Declarations): If a
	generic child unit is instantiated within a sibling child unit,
	the analysis of its private part requires that the private part
	of the ancestor be available, as is done when the context
	includes an instance of the ancestor.

gcc/testsuite/

	* gnat.dg/generic2-child.ads, gnat.dg/generic2-io_any.adb,
	gnat.dg/generic2-io_any.ads, gnat.dg/generic2.ads: New testcase.

From-SVN: r275949

Traversal functions as defined in SPARK RM 3.10 should not be inlined
for analysis in GNATprove, as this changes the ownership behavior.
Disable the inlining performed in GNATprove on functions which could be
interpreted as such.

There is no impact on compilation and thus no test.

2019-09-19  Yannick Moy  <moy@adacore.com>

gcc/ada/

	* inline.adb (Can_Be_Inlined_In_GNATprove_Mode): Add special
	case for traversal functions.

From-SVN: r275948

Now that SPARK supports access types, global constants of access type
may appear as outputs of a subprogram, with the meaning that the
underlying memory can be modified (see SPARK RM 3.10).

2019-09-19  Yannick Moy  <moy@adacore.com>

gcc/ada/

	* sem_prag.adb (Analyze_Global_In_Decl_Part): Do not issue an
	error when a constant of an access type is used as output in a
	Global contract.
	(Analyze_Depends_In_Decl_Part): Do not issue an error when a
	constant of an access type is used as output in a Depends
	contract.

gcc/testsuite/

	* gnat.dg/global2.adb, gnat.dg/global2.ads: New testcase.

From-SVN: r275947

2019-09-19  Arnaud Charlet  <charlet@adacore.com>

gcc/ada/

	* exp_attr.adb: Remove obsolete comment.

From-SVN: r275946

This fixes a segfault at run time for the call to a local subprogram
through an access value if the type of this access value is derived
from an initial access-to-subprogram type and the access value was
originally obtained with the initial type.

2019-09-19  Eric Botcazou  <ebotcazou@adacore.com>

gcc/ada/

	* sem_ch3.adb (Build_Derived_Access_Type): If this is an access-
	to-subprogram type, copy Can_Use_Internal_Rep from the parent.

gcc/testsuite/

	* gnat.dg/access9.adb: New testcase.

From-SVN: r275945

Unit sem_spark was implementing the borrow-checker for the support of
ownership pointers in SPARK. It has been moved to gnat2why codebase to
facilitate its evolution and allow the more powerful flow analysis to
provide its results for better analysis on pointers.

2019-09-19  Yannick Moy  <moy@adacore.com>

gcc/ada/

	* gcc-interface/Make-lang.in: Remove references to sem_spark.
	* sem_spark.adb, sem_spark.ads: Remove unit.

From-SVN: r275944

GNAT implements Machine_Rounding as an alias for Rounding but, whereas
the implementation of the latter is in line when possible, that of the
former is always out of line, which is not aligned with the intent of
the Ada RM.

This changes the compiler to using for Machine_Rounding the same in line
implementation as Rounding when possible.

Running these commands:

  gcc -c f.adb -gnatD
  grep system f.adb.dg

On the following sources:

function F (Val : Float) return Integer is
begin
  return Integer (Float'Machine_Rounding (Val));
end;

Should execute silently.

2019-09-19  Eric Botcazou  <ebotcazou@adacore.com>

gcc/ada/

	* exp_attr.adb (Is_Inline_Floating_Point_Attribute): Treat
	Machine_Rounding as an alias for Rounding.
	* sem_res.adb (Simplify_Type_Conversion): Likewise.

From-SVN: r275943

In the case of GNAT-LLVM, the GNAT FE no longer does expansion of
up-level references identified by the subprogram unnesting machinery
into activation record references. This is now only done by the FE when
generating C code. This expansion is already taken care of by the
gnat-llvm middle phase, so there's no benefit to also doing it in the
front end.

2019-09-19  Gary Dismukes  <dismukes@adacore.com>

gcc/ada/

	* exp_unst.adb (Unnest_Subprogram): Bypass the transformation of
	up-level references unless Opt.Generate_C_Code is enabled.

From-SVN: r275942

In the general case, the comparison for equality of array objects is
implemented by a local function that contains, among other things, a
loop running over the elements, comparing them one by one and exiting
as soon as an element is not the same in the two array objects.

For the specific case of constrained 2-element arrays, this is rather
heavy and unnecessarily obfuscates the control flow of the program,
so this change implements a simple conjunction of comparisons for it.

Running these commands:

  gcc -c p.ads -O -gnatD
  grep loop p.ads.dg

On the following sources:

package P is

  type Rec is record
    Re : Float;
    Im : Float;
  end record;

  type Arr is array (1 .. 2) of Rec;

  function Equal (A, B : Arr) return Boolean is (A = B);

end P;

Should execute silently.

2019-09-19  Eric Botcazou  <ebotcazou@adacore.com>

gcc/ada/

	* exp_ch4.adb (Expand_Array_Equality): If optimization is
	enabled, generate a simple conjunction of comparisons for the
	specific case of constrained 1-dimensional 2-element arrays.
	Fix formatting.

From-SVN: r275941

Routines Homonym_Number and Get_Homonym_Number were exactly the same,
except for minor style differences. Keep the one in Exp_Util; remove the
one in Exp_Dbug. No test attached, because semantics is unaffected.

2019-09-19  Piotr Trojanek  <trojanek@adacore.com>

gcc/ada/

	* exp_dbug.ads, exp_dbug.adb (Get_Homonym_Number): Remove.
	(Append_Homonym_Number): Use Homonym_Number instead of
	Get_Homonym_Number.
	* exp_util.ads, exp_util.adb (Homonym_Number): Mirror style of
	the removed Get_Homonym_Number routine, i.e. initialize local
	objects at declaration and refine the type of result.
	* sem_util.adb (Add_Homonym_Suffix): Use Homonym_Number instead
	of Get_Homonym_Number.

From-SVN: r275940

This patch fixes a compiler abort on a dynamic predicate applied to the
full view of a type in a generic package declaration, when the
expression for the predicate is a conditionql expression that contains
references to components of the full view of the type.

2019-09-19  Ed Schonberg  <schonberg@adacore.com>

gcc/ada/

	* sem_ch13.adb (Check_Aspect_At_End_Of_Declarations): Simplify
	handling of expressions in predicates when the context is a
	generic unit.

gcc/testsuite/

	* gnat.dg/predicate14.adb, gnat.dg/predicate14.ads: New
	testcase.

From-SVN: r275939

If a for loop starts with "for X in F (...)'Range loop", where F is a
function returning an unconstrained array, then memory is leaked. This
patch fixes that bug.

Running these commands:

  gnatmake -q -f main.adb
  main

On the following sources:

with Text_IO; use Text_IO;
package P is

   function Get_Objects return String;

end P;

package body P is
   function Get_Objects return String is
   begin
      return "xyzzy";
   end Get_Objects;

end P;

with Text_IO; use Text_IO;
pragma Warnings (Off, "an internal GNAT unit");
with System.Secondary_Stack;
pragma Warnings (On, "an internal GNAT unit");
with P; use P;

procedure Main is
   Max_Iterations : constant Integer := 1_000;

   procedure Leak_Call is
   begin
      for Id in Get_Objects'Range loop
         null;
      end loop;
   end Leak_Call;

   procedure SS_Info is new System.Secondary_Stack.SS_Info
(Text_IO.Put_Line);

begin
   for Iteration in 1 .. Max_Iterations loop
      Leak_Call;
   end loop;

   SS_Info;

end Main;

Should produce the following output:

  Secondary Stack information:
    Total size              :  10240 bytes
    Current allocated space :  0 bytes
    Number of Chunks        :  1
    Default size of Chunks  :  10240

2019-09-19  Bob Duff  <duff@adacore.com>

gcc/ada/

	* sem_attr.adb (Resolve_Attribute): Make sure the secondary
	stack is properly managed in the case of a 'Range attribute in a
	loop.

From-SVN: r275938

2019-09-19  Raphael Amiard  <amiard@adacore.com>

gcc/ada/

	* libgnat/a-cfhase.ads (Set): Add comments to public primitives.

From-SVN: r275937

2019-09-19  Raphael Amiard  <amiard@adacore.com>

gcc/ada/

	* libgnat/a-cbhama.ads, libgnat/a-cbhase.ads,
	libgnat/a-chtgop.ads (Clear): Refine comments

From-SVN: r275936

This fixes a spurious type mismatch failure reported between formal and
actual of a call to a subprogram that comes from the instantiation of a
child generic unit that itself contains an instantiation of a slibling
child generic unit, when the parent is itself a generic unit with
private part. The regression was introduced by a recent change made to
clear the Is_Generic_Actual_Type on the implicit full view built when a
generic package is instantiated on a private type.

2019-09-19  Eric Botcazou  <ebotcazou@adacore.com>

gcc/ada/

	* sem_ch12.adb (Restore_Private_Views): Comment out new code
	that clear the Is_Generic_Actual_Type also on the full view.

gcc/testsuite/

	* gnat.dg/generic_inst13.adb,
	gnat.dg/generic_inst13_pkg-nested_g.ads,
	gnat.dg/generic_inst13_pkg-ops_g.ads,
	gnat.dg/generic_inst13_pkg.ads: New testcase.

From-SVN: r275935

This patch fixes a bug where an array object initialized with a
concatenation, and that has an aspect_specification for Alignment,
causes the compiler goes into an infinite loop.

2019-09-19  Bob Duff  <duff@adacore.com>

gcc/ada/

	* exp_ch3.adb (Rewrite_As_Renaming): Return False if there are
	any aspect specifications, because otherwise Insert_Actions
	blows up.

gcc/testsuite/

	* gnat.dg/concat3.adb: New testcase.

From-SVN: r275934

This fixes a regression introduced by the previous change that improved
the handling of explicit by-reference mechanism. For the very specific
case of a component of a bit-packed array, the front-end still needs to
insert a copy around the call because this is where the rewriting into
the sequence of mask-and-shifts is done for the code generator.

2019-09-19  Eric Botcazou  <ebotcazou@adacore.com>

gcc/ada/

	* exp_ch6.adb (Add_Simple_Call_By_Copy_Code): Add
	Bit_Packed_Array parameter and documet it. Always insert a copy
	if it is set True.
	(Expand_Actuals): Adjust the calls to
	Add_Simple_Call_By_Copy_Code.

gcc/testsuite/

	* gnat.dg/pack26.adb: New testcase.

From-SVN: r275933

This patch fixes a bug in which if a symbol is not found, gnatxref can
sometimes enter an infinite loop. No impact on compilation.

2019-09-19  Bob Duff  <duff@adacore.com>

gcc/ada/

	* xref_lib.adb (Get_Symbol_Name): If we reach EOF in the first
	loop without finding the symbol, return "???". Otherwise, it's
	an infinite loop.
	(Parse_EOL): Assert that we're not already at EOF.  Remove
	processing of LF/CR -- there are no operating systems that use
	that.

From-SVN: r275932

This improves the handling of an explicit by-reference passing mechanism
specified by means of the GNAT pragma Export_Function.  This device sort
of circumvents the rules of the language for the by-reference passing
mechanism and it's then up to the programmer to ensure that the actual
parameter is addressable; if it is not, the compiler will generate a
temporary around the call, thus effectively passing the actual by copy.

It turns out that the compiler was too conservative when determining
whether the actual parameter is addressable, in particular if it's a
component of a record type subject to a representation clause.

The change effectively moves this computation from the front-end to the
back-end, which has much more information on the layout and alignment
of types and thus can be less conservative.

2019-09-19  Eric Botcazou  <ebotcazou@adacore.com>

gcc/ada/

	* exp_ch6.adb (Is_Legal_Copy): Also return false for an aliased
	formal and a formal passed by reference in convention Ada.  Add
	missing guard to the existing test on Is_Valued_Procedure.

From-SVN: r275931

2019-09-19  Bob Duff  <duff@adacore.com>

gcc/ada/

	* rtsfind.ads (RTE_Available): Improve comment.

From-SVN: r275930

2019-09-19  Richard Biener  <rguenther@suse.de>

	* tree-parloops.c (parloops_is_slp_reduction): Do not set
	LOOP_VINFO_OPERANDS_SWAPPED.
	(parloops_is_simple_reduction): Likewise.
	* tree-vect-loop.c (_loop_vec_info::_loop_vec_info): Do not
	initialize operands_swapped.
	(_loop_vec_info::~_loop_vec_info): Do not re-canonicalize stmts.
	(vect_is_slp_reduction): Do not swap operands.
	* tree-vectorizer.h (_loop_vec_info::operands_swapped): Remove.
	(LOOP_VINFO_OPERANDS_SWAPPED): Likewise.

From-SVN: r275928

Extend pass rpad to handle avx512f vcvtusi2ss vcvtusi2ss
538.imagick_r improved by 4% with single copy run on SKYLAKE workstation.

gcc/
	* config/i386/i386.md
	(*floatuns<SWI48:mode><MODEF:mode>2_avx512):
	Add avx_partial_xmm_update.

gcc/testsuie
	* gcc.target/i386/pr87007-3.c: New test.

From-SVN: r275926

	PR target/91683
	* config/riscv/riscv-protos.h (riscv_split_symbol): New bool parameter.
	(riscv_move_integer): Likewise.
	* config/riscv/riscv.c (riscv_split_integer): Pass FALSE for new
	riscv_move_integer arg.
	(riscv_legitimize_move): Likewise.
	(riscv_force_temporary): New parameter in_splitter.  Don't call
	force_reg if true.
	(riscv_unspec_offset_high): Pass FALSE for new riscv_force_temporary
	arg.
	(riscv_add_offset): Likewise.
	(riscv_split_symbol): New parameter in_splitter.  Pass to
	riscv_force_temporary.
	(riscv_legitimize_address): Pass FALSE for new riscv_split_symbol
	arg.
	(riscv_move_integer): New parameter in_splitter.  New local
	can_create_psuedo.  Don't call riscv_split_integer or force_reg when
	in_splitter TRUE.
	(riscv_legitimize_const_move): Pass FALSE for new riscv_move_integer,
	riscv_split_symbol, and riscv_force_temporary args.
	* config/riscv/riscv.md (low<mode>+1): Pass TRUE for new
	riscv_move_integer arg.
	(low<mode>+2): Pass TRUE for new riscv_split_symbol arg.

From-SVN: r275925

From-SVN: r275924

    
    This CL serves as part of an initial change for enabling gollvm
    building on arm64 linux, the rest of the change will be covered by
    another one to the gollvm repo.
    
    Incorporate type definition of 'uint128' to 'runtime' and 'syscall'
    packges, the change is not specific to arm64 linux but made available
    for all platforms.
    
    Verified by building and unit-testing gollvm on linux x86-64 and arm64.
    
    Verified by building and checking gccgo on linux x86-64 and arm64.
    
    Fixes golang/go#33711
    
    Change-Id: I4720c7d810cfd4ef720962fb4104c5641b2459c0

From-SVN: r275919

We currently use default mid-end expanders for logical DImode operations.
These split operations without first splitting off complex immediates or
memory operands.  The resulting expansions are non-optimal and allow for
fewer LDRD/STRD opportunities.  So add back explicit expanders which ensure
memory operands and immediates are handled more efficiently.

    gcc/
	PR target/91738
	* config/arm/arm.md (<logical_op>di3): Expand explicitly.
	(one_cmpldi2): Likewise.
	* config/arm/arm.c (const_ok_for_dimode_op): Return true if one
	of the constant parts is simple.
	* config/arm/iterators.md (LOGICAL): Add new code iterator.
	(logical_op): Add new code attribute.
	(logical_OP): Likewise.
	* config/arm/predicates.md (arm_anddi_operand): Add predicate.
	(arm_iordi_operand): Add predicate.
	(arm_xordi_operand): Add predicate.

From-SVN: r275907

On Skylake, we should move integer register to SSE register without
going through memory.  This patch restores Skylake SImode hard register
store cost to 6.

gcc/

	PR target/90878
	* config/i386/x86-tune-costs.h (skylake_cost): Restore SImode
	hard register store cost to 6.

gcc/testsuite/

	PR target/90878
	* gcc.target/i386/pr90878.c: New test.

From-SVN: r275906