Pragma Warning_As_Error now works for style warnings (messages that
start with "(style)", enabled by -gnaty) the same way it works for
regular warnings enabled by -gnatw.

The following test should fail to build with style checks:

gnat.adc:

pragma Warning_As_Error ("two spaces required");

style.adb:

procedure Style is
   X : Integer;
begin
   null;
   --Hello
end;

gnatmake -q -f -g style.adb -gnaty

should get:

style.adb:2:04: warning: variable "X" is never read and never assigned
style.adb:5:06: error: (style) two spaces required [warning-as-error]
style.adb:6:01: (style) "end Style" required
gnatmake: "style.adb" compilation error

and no executable should be created.

2019-08-20  Bob Duff  <duff@adacore.com>

gcc/ada/

	* errout.adb (Error_Msg_Internal): Set Warn_Err in case of
	Is_Style_Msg.
	* erroutc.adb (Output_Msg_Text): Do Warnings_Treated_As_Errors
	processing and [warning-as-error] modification for style
	messages.  Clean up code, simplify, remove unnecessary block
	statement, add renaming of table entry.
	* erroutc.ads (Warning_Treated_As_Error): Fix comment: no such
	thing as Set_Warning_As_Error.
	* opt.ads: Clean up comments and move related declarations near
	each other.
	* par-prag.adb: Process Warning_As_Error. This is necessary
	because many style warning happen during parsing.
	* sem_prag.adb: Use new Acquire_Warning_Match_String.
	* sem_util.ads, sem_util.adb (Acquire_Warning_Match_String): New
	function shared by par-prag.adb and sem_prag.adb. Replaces the
	procedure in sem_prag.adb. Avoid use of global variables.
	* stringt.ads, stringt.adb (To_String): New function to convert
	String_Id to String.
	* doc/gnat_rm/implementation_defined_pragmas.rst: Document the
	new feature.
	* gnat_rm.texi: Regenerate.

From-SVN: r274721

This change is aimed at removing a couple of linear searches in the
units management code that can become problematic performance-wise when
the number of loaded units is in the several hundreds, which can happen
for large files even at -O0 without any inlining.

It introduces an auxiliary hash table to record a mapping between the
name of units and their entry in the units table, and then replaces the
linear searches by lookups in this names table.  This can save up to 2%
of the compilation time spent in the front-end in some cases.

There should be no functional changes, except in the error message
issued for circular unit dependencies in very peculiar and convoluted
cases.

2019-08-20  Eric Botcazou  <ebotcazou@adacore.com>

gcc/ada/

	* lib.ads: Add with clause for GNAT.HTable.
	Add pragma Inline for Is_Loaded and alphabetize the list.
	(Unit_Name_Table_Size): New constant.
	(Unit_Name_Header_Num): New subtype.
	(Unit_Name_Hash): New function declaration.
	(Unit_Names): New simple hash table.
	(Init_Unit_Name): New procedure declaration.
	* lib.adb (Set_Unit_Name): Unregister the old name in the table,
	if any, and then register the new name.
	(Init_Unit_Name): New procedure.
	(Is_Loaded): Reimplement using a lookup in the names table.
	(Remove_Unit): Unregister the name.
	(Unit_Name_Hash): New function.
	* lib-load.adb (Create_Dummy_Package_Unit): Call Init_Unit_Name.
	(Load_Unit): Use a lookup in the names table to find out whether
	the unit has already been loaded.  Call Init_Unit_Name and then
	Remove_Unit if the loading has failed.
	(Make_Child_Decl_Unit): Call Init_Unit_Name.
	(Make_Instance_Unit): Likewise.
	* lib-writ.adb (Ensure_System_Dependency): Likewise.

From-SVN: r274720

No functional change.

2019-08-20  Bob Duff  <duff@adacore.com>

gcc/ada/

	* sem_ch13.adb (Record_Hole_Check): Initialize After_Last.

From-SVN: r274719

Years ago, we adapted Get_Kind_Of_Unit so that gnatprove could use it to
detect both bodies and specs of predefined units.

However, this wasn't really needed: gnatprove could simply reuse
Lib.In_Predefined_Unit and now it does. This patch simply reverts two
commits mentioned above.

No frontend test provided, because the removed comment is clear that this
doesn't affect the compiler. Other tools similarly should not be affected
(at least they were not when this change was introduced in 2012).

2019-08-20  Piotr Trojanek  <trojanek@adacore.com>

gcc/ada/

	* impunit.adb (Get_Kind_Of_Unit): Revert change for adapting
	this routine for gnatprove.

From-SVN: r274718

2019-08-20  Arnaud Charlet  <charlet@adacore.com>

gcc/ada/

	* doc/gnat_rm/implementation_defined_pragmas.rst: Document
	requirements for Pragma Lock_Free.
	* gnat_rm.texi: Regenerate.

From-SVN: r274717

2019-08-20  Philippe Gil  <gil@adacore.com>

gcc/ada/

	* bindgen.adb (Gen_Main): Set gnat_argc/gnat_argv to argc/argv
	only when still uninitialized.

From-SVN: r274716

2019-08-20  Bob Duff  <duff@adacore.com>

gcc/ada/

	* libgnat/g-comlin.ads (Exit_From_Command_Line): Fix
	documentation for GNAT.Command_Line.

From-SVN: r274715

2019-08-20  Pierre-Marie de Rodat  <derodat@adacore.com>

gcc/ada/

	PR ada/91492
	* gcc-interface/lang.opt (-fdump-scos): Add missing dot at the
	end of the documentation.

From-SVN: r274714

	PR rtl-optimization/91347
	* dse.c (scan_insn): Call add_wild_read for non-const/memset tail calls
	before reload if HARD_FRAME_POINTER_IS_ARG_POINTER.

From-SVN: r274708

This patch adds a flag that tells targets whether an argument
has been converted to pass-by-reference form.  This replaces
assign_parm_data_one::passed_pointer in function.c.

The flag is set automatically for places that call
apply_pass_by_reference_rules.  Places that apply
pass-by-reference manually need to set it themselves.

(After previous changes, no targets apply pass-by-reference
manually.  They all go through apply_pass_by_reference_rules.)

2019-08-20  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
	* calls.h (function_arg_info): Add a pass_by_reference field,
	defaulting to false.
	* calls.c (apply_pass_by_reference_rules): Set pass_by_reference
	when applying pass-by-reference semantics.
	(initialize_argument_information): Likewise.
	(emit_library_call_value_1): Likewise.
	* function.c (assign_parm_data_one): Remove passed_pointer field.
	(assign_parm_find_data_types): Don't set it.
	(assign_parm_find_stack_rtl, assign_parm_adjust_stack_rtl)
	(assign_parm_setup_reg, assign_parms, gimplify_parameters): Use
	arg.pass_by_reference instead of passed_pointer.

From-SVN: r274707

This patch makes the two main calls.c argument-processing
routines track the state of the argument in a function_arg_info
instead of using separate mode variables.

2019-08-20  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
	* calls.c (emit_library_call_value_1): Merge arg and orig_arg
	into a single function_arg_info, updating its fields when we
	apply pass-by-reference and promotion semantics.  Use the
	function_arg_info to track the mode rather than keeping it in
	a separate local variable.
	(initialize_argument_information): Likewise.  Base the final
	arg_to_skip on this new function_arg_info rather than creating
	a new one from scratch.

From-SVN: r274706

This patch adds a function_arg_info field to assign_parm_data_one,
so that:

  - passed_type -> arg.type
  - promoted_mode -> arg.mode
  - named_arg -> arg.named

We can then pass this function_arg_info directly to the converted
hooks.

Between the initialisation of the assign_parm_data_one and the
application of promotion rules (which is a state internal to
assign_parm_find_data_types), arg.mode is equivalent to passed_mode
(i.e. to TYPE_MODE).

2019-08-20  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
	* function.c (assign_parm_data_one): Replace passed_type,
	promoted_mode and named_arg with a function_arg_info field.
	(assign_parm_find_data_types): Remove local variables and
	assign directly to "data".  Make data->passed_mode shadow
	data->arg.mode until promotion, then assign the promoted
	mode to data->arg.mode.
	(assign_parms_setup_varargs, assign_parm_find_entry_rtl)
	(assign_parm_find_stack_rtl, assign_parm_adjust_entry_rtl)
	(assign_parm_remove_parallels, assign_parm_setup_block_p)
	(assign_parm_setup_block, assign_parm_setup_reg)
	(assign_parm_setup_stack, assign_parms, gimplify_parameters): Use
	arg.mode instead of promoted_mode, arg.type instead of passed_type
	and arg.named instead of named_arg.  Use data->arg for
	function_arg_info structures that had the field values passed_type,
	promoted_mode and named_arg.  Base other function_arg_infos on
	data->arg, changing the necessary properties.

From-SVN: r274705

This patch adds a helper routine that applies pass-by-reference
semantics to an existing function_arg_info.

The c6x part means that c6x_function_arg and c6x_function_arg_advance
see the same "named" value as pass_by_reference did, rather than
pass_by_reference seeing "true" and the others seeing "false".
This doesn't matter because the c6x port doesn't care about namedness.

The rs6000.c patch removes an assignment to "type", but the only
later code to use it was the patched promote_mode line.

(The reason for patching these places despite the above is that
often target code gets used as a basis for new targets or changes
to existing ones.)

2019-08-20  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
	* calls.h (apply_pass_by_reference_rules): Declare.
	* calls.c (apply_pass_by_reference_rules): New function.
	* config/c6x/c6x.c (c6x_call_saved_register_used): Use it.
	* config/rs6000/rs6000-call.c (rs6000_parm_needs_stack): Likewise.
	* config/s390/s390.c (s390_call_saved_register_used): Likewise.
	* function.c (assign_parm_find_data_types): Likewise.
	* var-tracking.c (prepare_call_arguments): Likewise.

From-SVN: r274704

The hook is passed the promoted mode instead of the original type mode.

The expr.h reference in the documentation is no longer correct, but
pointing to calls.h or calls.c doesn't help much either.  I just left
this as-is since it's not related to the point of the series.

After previous changes, most places already pass arg.mode and arg.type.
Only i386 and mcore needed to construct a new one out of nothing.
rs6000 needs to construct one slightly earlier than before.

2019-08-20  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
	* target.def (must_pass_in_stack): Take a function_arg_info instead
	of a mode and a type.
	* doc/tm.texi: Regenerate.
	* calls.h (must_pass_in_stack_var_size): Take a function_arg_info
	instead of a mode and a type.
	(must_pass_in_stack_var_size_or_pad): Likewise.
	* calls.c (must_pass_in_stack_var_size): Likewise.
	(must_pass_in_stack_var_size_or_pad): Likewise.
	(initialize_argument_information): Update call to
	targetm.calls.must_pass_in_stack.
	(must_pass_va_arg_on_stack): Likewise.
	* function.c (assign_parm_find_entry_rtl): Likewise.
	* targhooks.c (hook_pass_by_reference_must_pass_in_stack): Likewise.
	* config/alpha/alpha.c (alpha_function_arg): Likewise.
	(alpha_function_arg_advance): Likewise.
	* config/cr16/cr16.c (cr16_function_arg): Likewise.
	(cr16_function_arg_advance): Likewise.
	* config/cris/cris.c (cris_pass_by_reference): Likewise.
	(cris_arg_partial_bytes): Likewise.
	* config/iq2000/iq2000.c (iq2000_pass_by_reference): Likewise.
	* config/lm32/lm32.c (lm32_function_arg): Likewise.
	* config/mcore/mcore.c (mcore_num_arg_regs): Likewise.
	(mcore_function_arg, mcore_arg_partial_bytes): Likewise.
	* config/mips/mips.c (mips_pass_by_reference): Likewise.
	* config/mmix/mmix.c (mmix_function_arg_advance): Likewise.
	(mmix_function_arg_1, mmix_pass_by_reference): Likewise.
	* config/sh/sh.c (sh_pass_by_reference): Likewise.
	* config/stormy16/stormy16.c (xstormy16_function_arg): Likewise.
	* config/xtensa/xtensa.c (xtensa_function_arg_advance): Likewise.
	* config/arm/arm.c (arm_must_pass_in_stack): Take a function_arg_info
	instead of a mode and a type.
	* config/fr30/fr30.c (fr30_must_pass_in_stack): Likewise.
	(fr30_num_arg_regs): Likewise.
	(fr30_setup_incoming_varargs): Update calls accordingly.
	(fr30_arg_partial_bytes, fr30_function_arg): Likewise.
	(fr30_function_arg_advance): Likewise.
	* config/frv/frv.c (frv_must_pass_in_stack): Take a function_arg_info
	instead of a mode and a type.
	* config/gcn/gcn.c (num_arg_regs): Likewise.
	(gcn_function_arg, gcn_function_arg_advance): Update calls to
	num_arg_regs and targetm.calls.must_pass_in_stack.
	(gcn_arg_partial_bytes): Likewise.
	* config/i386/i386.c (ix86_must_pass_in_stack): Take a
	function_arg_info instead of a mode and a type.
	(classify_argument): Update call accordingly.
	* config/nds32/nds32.c (nds32_must_pass_in_stack): Take a
	function_arg_info instead of a mode and a type.
	* config/rs6000/rs6000-internal.h (rs6000_must_pass_in_stack):
	Likewise.
	* config/rs6000/rs6000-call.c (rs6000_must_pass_in_stack): Likewise.
	(rs6000_parm_needs_stack): Update call accordingly.
	(setup_incoming_varargs): Likewise.

From-SVN: r274703

The hook is passed the unpromoted type mode instead of the promoted mode.

The aarch64 definition is redundant, but worth keeping for emphasis.

2019-08-20  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
	* target.def (callee_copies): Take a function_arg_info instead
	of a mode, type and named flag.
	* doc/tm.texi: Regenerate.
	* targhooks.h (hook_callee_copies_named): Take a function_arg_info
	instead of a mode, type and named flag.
	(hook_bool_CUMULATIVE_ARGS_mode_tree_bool_false): Delete.
	(hook_bool_CUMULATIVE_ARGS_mode_tree_bool_true): Likewise.
	(hook_bool_CUMULATIVE_ARGS_arg_info_true): New function.
	* targhooks.c (hook_callee_copies_named): Take a function_arg_info
	instead of a mode, type and named flag.
	(hook_bool_CUMULATIVE_ARGS_mode_tree_bool_false): Delete.
	(hook_bool_CUMULATIVE_ARGS_mode_tree_bool_true): Likewise.
	(hook_bool_CUMULATIVE_ARGS_arg_info_true): New function.
	* calls.h (reference_callee_copied): Take a function_arg_info
	instead of a mode, type and named flag.
	* calls.c (reference_callee_copied): Likewise.
	(initialize_argument_information): Update call accordingly.
	(emit_library_call_value_1): Likewise.
	* function.c (gimplify_parameters): Likewise.
	* config/aarch64/aarch64.c (TARGET_CALLEE_COPIES): Define to
	hook_bool_CUMULATIVE_ARGS_arg_info_false instead of
	hook_bool_CUMULATIVE_ARGS_mode_tree_bool_false.
	* config/c6x/c6x.c (c6x_callee_copies): Delete.
	(TARGET_CALLEE_COPIES): Define to
	hook_bool_CUMULATIVE_ARGS_arg_info_true instead.
	* config/epiphany/epiphany.c (TARGET_CALLEE_COPIES): Define to
	hook_bool_CUMULATIVE_ARGS_arg_info_true instead of
	hook_bool_CUMULATIVE_ARGS_mode_tree_bool_true.
	* config/mips/mips.c (mips_callee_copies): Take a function_arg_info
	instead of a mode, type and named flag.
	* config/mmix/mmix.c (TARGET_CALLEE_COPIES): Define to
	hook_bool_CUMULATIVE_ARGS_arg_info_true instead of
	hook_bool_CUMULATIVE_ARGS_mode_tree_bool_true.
	* config/mn10300/mn10300.c (TARGET_CALLEE_COPIES): Likewise.
	* config/msp430/msp430.c (msp430_callee_copies): Delete.
	(TARGET_CALLEE_COPIES): Define to
	hook_bool_CUMULATIVE_ARGS_arg_info_true instead.
	* config/pa/pa.c (pa_callee_copies): Take a function_arg_info
	instead of a mode, type and named flag.
	* config/sh/sh.c (sh_callee_copies): Likewise.
	* config/v850/v850.c (TARGET_CALLEE_COPIES): Define to
	hook_bool_CUMULATIVE_ARGS_arg_info_true instead of
	hook_bool_CUMULATIVE_ARGS_mode_tree_bool_true.

From-SVN: r274702

There seems to be a bit of confusion around this one.  Almost all
callers pass the same arguments as TARGET_FUNCTION_ARG, meaning
that the mode is the promoted mode rather than the type mode.
But the calls.c handling for normal typed arguments instead passes
the unpromoted TYPE_MODE (despite passing the promoted mode to
TARGET_FUNCTION_ARG).  I've kept this behaviour with a ??? comment.

(The calls.c handling of libgcc functions does pass the promoted
mode though, as does the function.c handling of incoming arguments.)

Also, a couple of the arm callers don't seem to be using the hook
correctly.  Again I kept the current choices and added a ??? comment.

2019-08-20  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
	* target.def (function_arg_advance): Take a function_arg_info instead
	of a mode, type and named flag.
	* doc/tm.texi: Regenerate.
	* targhooks.h (default_function_arg_advance): Take a function_arg_info
	instead of a mode, type and named flag.
	* targhooks.c (default_function_arg_advance): Likewise.
	* calls.c (initialize_argument_information): Update call to
	targetm.calls.function_arg_advance.
	(emit_library_call_value_1): Likewise.
	* dse.c (get_call_args): Likewise.
	* expr.c (block_move_libcall_safe_for_call_parm): Likewise.
	* function.c (assign_parms, gimplify_parameters): Likewise.
	* var-tracking.c (prepare_call_arguments): Likewise.
	* config/aarch64/aarch64.c (aarch64_function_arg_advance): Take a
	function_arg_info instead of a mode, type and named flag.
	(aarch64_setup_incoming_varargs): Update call accordingly.
	* config/alpha/alpha.c (alpha_function_arg_advance): Take a
	function_arg_info instead of a mode, type and named flag.
	(alpha_setup_incoming_varargs): Update call accordingly.
	* config/arc/arc.c (arc_function_arg_advance): Take a
	function_arg_info instead of a mode, type and named flag.
	(arc_setup_incoming_varargs): Update call accordingly.
	* config/arm/arm.c (arm_function_arg_advance): Take a
	function_arg_info instead of a mode, type and named flag.
	(cmse_func_args_or_return_in_stack): Update call accordingly.
	(arm_function_ok_for_sibcall): Likewise.
	(cmse_nonsecure_call_clear_caller_saved): Likewise.
	* config/avr/avr.c (avr_function_arg_advance): Take a
	function_arg_info instead of a mode, type and named flag.
	* config/bfin/bfin.c (bfin_function_arg_advance): Likewise.
	* config/c6x/c6x.c (c6x_function_arg_advance): Likewise.
	(c6x_call_saved_register_used): Update call accordingly.
	* config/cr16/cr16.c (cr16_function_arg_advance): Take a
	function_arg_info instead of a mode, type and named flag.
	* config/cris/cris.c (cris_function_arg_advance): Likewise.
	* config/csky/csky.c (csky_function_arg_advance): Likewise.
	(csky_setup_incoming_varargs): Update call accordingly.
	* config/epiphany/epiphany.c (epiphany_function_arg_advance): Take a
	function_arg_info instead of a mode, type and named flag.
	* config/fr30/fr30.c (fr30_function_arg_advance): Likewise.
	* config/frv/frv.c (frv_function_arg_advance): Likewise.
	* config/ft32/ft32.c (ft32_function_arg_advance): Likewise.
	* config/gcn/gcn.c (gcn_function_arg_advance): Likewise.
	* config/h8300/h8300.c (h8300_function_arg_advance): Likewise.
	* config/i386/i386.c (ix86_function_arg_advance): Likewise.
	(ix86_setup_incoming_varargs): Update call accordingly.
	* config/ia64/ia64.c (ia64_function_arg_advance): Take a
	function_arg_info instead of a mode, type and named flag.
	(ia64_setup_incoming_varargs): Update call accordingly.
	* config/iq2000/iq2000.c (iq2000_function_arg_advance): Take a
	function_arg_info instead of a mode, type and named flag.
	(iq2000_expand_prologue): Update call accordingly.
	* config/lm32/lm32.c (lm32_function_arg_advance): Take a
	function_arg_info instead of a mode, type and named flag.
	* config/m32c/m32c.c (m32c_function_arg_advance): Likewise.
	* config/m32r/m32r.c (m32r_function_arg_advance): Likewise.
	* config/m68k/m68k.c (m68k_function_arg_advance): Likewise.
	* config/mcore/mcore.c (mcore_function_arg_advance): Likewise.
	* config/microblaze/microblaze.c (microblaze_function_arg_advance):
	Likewise.
	(microblaze_expand_prologue): Update call accordingly.
	* config/mips/mips.c (mips_function_arg_advance): Take a
	function_arg_info instead of a mode, type and named flag.
	(mips_setup_incoming_varargs): Update call accordingly.
	(mips_output_args_xfer): Likewise.
	* config/mmix/mmix.c (mmix_function_arg_advance): Take a
	function_arg_info instead of a mode, type and named flag.
	* config/mn10300/mn10300.c (mn10300_function_arg_advance): Likewise.
	* config/moxie/moxie.c (moxie_function_arg_advance): Likewise.
	* config/msp430/msp430.c (msp430_function_arg_advance): Likewise.
	* config/nds32/nds32.c (nds32_function_arg_advance): Likewise.
	* config/nios2/nios2.c (nios2_function_arg_advance): Likewise.
	(nios2_setup_incoming_varargs): Update call accordingly.
	* config/nvptx/nvptx.c (nvptx_function_arg_advance): Take a
	function_arg_info instead of a mode, type and named flag.
	* config/or1k/or1k.c (or1k_function_arg_advance): Likewise.
	* config/pa/pa.c (pa_function_arg_advance): Likewise.
	* config/pdp11/pdp11.c (pdp11_function_arg_advance): Likewise.
	* config/pru/pru.c (pru_function_arg_advance): Likewise.
	* config/riscv/riscv.c (riscv_function_arg_advance): Likewise.
	(riscv_setup_incoming_varargs): Update call accordingly.
	* config/rl78/rl78.c (rl78_function_arg_advance): Take a
	function_arg_info instead of a mode, type and named flag.
	* config/rs6000/rs6000-internal.h (rs6000_function_arg_advance):
	Likewise.
	* config/rs6000/rs6000-call.c (rs6000_function_arg_advance): Likewise.
	(rs6000_parm_needs_stack): Update call accordingly.
	* config/rx/rx.c (rx_function_arg_advance): Take a function_arg_info
	instead of a mode, type and named flag.
	* config/s390/s390.c (s390_function_arg_advance): Likewise.
	(s390_call_saved_register_used): Update call accordingly.
	* config/sh/sh.c (sh_function_arg_advance): Take a function_arg_info
	instead of a mode, type and named flag.
	(sh_output_mi_thunk): Update call accordingly.
	* config/sparc/sparc.c (sparc_function_arg_advance): Take a
	function_arg_info instead of a mode, type and named flag.
	* config/spu/spu.c (spu_function_arg_advance): Likewise.
	(spu_setup_incoming_varargs): Update call accordingly.
	* config/stormy16/stormy16.c (xstormy16_function_arg_advance): Take a
	function_arg_info instead of a mode, type and named flag.
	* config/tilegx/tilegx.c (tilegx_function_arg_advance): Likewise.
	(tilegx_setup_incoming_varargs): Update call accordingly.
	* config/tilepro/tilepro.c (tilepro_function_arg_advance): Take a
	function_arg_info instead of a mode, type and named flag.
	(tilegx_setup_incoming_varargs): Update call accordingly.
	* config/v850/v850.c (v850_function_arg_advance): Take a
	function_arg_info instead of a mode, type and named flag.
	* config/vax/vax.c (vax_function_arg_advance): Likewise.
	* config/visium/visium.c (visium_function_arg_advance): Likewise.
	(visium_setup_incoming_varargs): Update call accordingly.
	* config/xtensa/xtensa.c (xtensa_function_arg_advance): Take a
	function_arg_info instead of a mode, type and named flag.

From-SVN: r274701

This patch makes both TARGET_FUNCTION_ARG and
TARGET_FUNCTION_INCOMING_ARG take a function_arg_info.
They have to be done together since many targets use the
same function for both.

The hooks are passed the promoted mode instead of the original type mode.

2019-08-20  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
	* target.def (function_arg, function_incoming_arg): Take a
	function_arg_info instead of a mode, tree and named flag.
	* doc/tm.texi: Regenerate.
	* targhooks.h (default_function_arg): Take a function_arg_info
	instead of a mode, tree and named flag.
	(default_function_incoming_arg): Likewise.
	* targhooks.c (default_function_arg): Likewise.
	(default_function_incoming_arg): Likewise.
	* calls.h (function_arg_info::end_marker_p): New function.
	(function_arg_info::end_marker): Likewise.
	* calls.c (prepare_call_address, initialize_argument_information)
	(expand_call, emit_library_call_value_1): Update calls to
	targetm.calls.function_arg and targetm.calls.function_incoming_arg.
	* dse.c: Include calls.h.
	(get_call_args): Update call to targetm.calls.function_arg.
	* expr.c (block_move_libcall_safe_for_call_parm): Likewise.
	* var-tracking.c (prepare_call_arguments): Likewise.
	* function.c (assign_parm_find_entry_rtl): Update call to
	targetm.calls.function_incoming_arg.
	* config/aarch64/aarch64.c (aarch64_function_arg): Take a
	function_arg_info instead of a mode, tree and named flag.
	* config/alpha/alpha.c (alpha_function_arg): Likewise.
	* config/arc/arc.c (arc_function_arg): Likewise.
	* config/arm/arm.c (arm_function_arg): Likewise.
	(cmse_func_args_or_return_in_stack): Update call accordingly.
	(arm_function_ok_for_sibcall): Likewise.
	(cmse_nonsecure_call_clear_caller_saved): Likewise.
	* config/avr/avr.c (avr_function_arg): Take a function_arg_info
	instead of a mode, tree and named flag.
	* config/bfin/bfin.c (bfin_function_arg): Likewise.
	* config/c6x/c6x.c (c6x_function_arg): Likewise.
	(c6x_call_saved_register_used): Update call accordingly.
	* config/cr16/cr16.c (cr16_function_arg): Take a function_arg_info
	instead of a mode, tree and named flag.
	* config/cris/cris.c (cris_function_arg, cris_function_incoming_arg)
	(cris_function_arg_1): Likewise.
	* config/csky/csky.c (csky_function_arg): Likewise.
	* config/epiphany/epiphany.c (epiphany_function_arg): Likewise.
	* config/fr30/fr30.c (fr30_function_arg): Likewise.
	* config/frv/frv.c (frv_function_arg, frv_function_incoming_arg)
	(frv_function_arg_1): Likewise.
	* config/ft32/ft32.c (ft32_function_arg): Likewise.
	* config/gcn/gcn.c (gcn_function_arg): Likewise.
	* config/h8300/h8300.c (h8300_function_arg): Likewise.
	* config/i386/i386.c (ix86_function_arg): Likewise.
	* config/ia64/ia64.c (ia64_function_arg, ia64_function_incoming_arg)
	(ia64_function_arg_1): Likewise.
	* config/iq2000/iq2000.c (iq2000_function_arg): Likewise.
	(iq2000_expand_prologue, iq2000_pass_by_reference): Update call
	accordingly.
	* config/lm32/lm32.c (lm32_function_arg): Take a function_arg_info
	instead of a mode, tree and named flag.
	* config/m32c/m32c.c (m32c_function_arg): Likewise.
	* config/m32r/m32r.c (m32r_function_arg): Likewise.
	* config/m68k/m68k.c (m68k_function_arg): Likewise.
	* config/mcore/mcore.c (mcore_function_arg): Likewise.
	* config/microblaze/microblaze.c (microblaze_function_arg): Likewise.
	(microblaze_expand_prologue): Update call accordingly.
	* config/mips/mips.c (mips_function_arg): Take a function_arg_info
	instead of a mode, tree and named flag.
	* config/mmix/mmix.c (mmix_function_incoming_arg, mmix_function_arg)
	(mmix_function_arg_1): Likewise.
	* config/mn10300/mn10300.c (mn10300_function_arg): Likewise.
	* config/moxie/moxie.c (moxie_function_arg): Likewise.
	* config/msp430/msp430.c (msp430_function_arg): Likewise.
	* config/nds32/nds32.c (nds32_function_arg): Likewise.
	* config/nios2/nios2.c (nios2_function_arg): Likewise.
	* config/nvptx/nvptx.c (nvptx_function_arg): Likewise.
	(nvptx_function_incoming_arg): Likewise.
	* config/or1k/or1k.c (or1k_function_arg): Likewise.
	* config/pa/pa.c (pa_function_arg): Likewise.
	* config/pdp11/pdp11.c (pdp11_function_arg): Likewise.
	* config/pru/pru.c (pru_function_arg): Likewise.
	* config/riscv/riscv.c (riscv_function_arg): Likewise.
	* config/rl78/rl78.c (rl78_function_arg): Likewise.
	* config/rs6000/rs6000-internal.h (rs6000_function_arg): Likewise.
	* config/rs6000/rs6000-call.c (rs6000_function_arg): Likewise.
	(rs6000_parm_needs_stack): Update call accordingly.
	* config/rx/rx.c (rx_function_arg): Take a function_arg_info
	instead of a mode, tree and named flag.
	* config/s390/s390.c (s390_function_arg): Likewise.
	(s390_call_saved_register_used): Update call accordingly.
	* config/sh/sh.c (sh_function_arg): Take a function_arg_info
	instead of a mode, tree and named flag.
	(sh_output_mi_thunk): Update call accordingly.
	* config/sparc/sparc.c (sparc_function_arg_1, sparc_function_arg)
	(sparc_function_incoming_arg): Take a function_arg_info instead of
	a mode, tree and named flag.
	* config/spu/spu.c (spu_function_arg): Likewise.
	* config/stormy16/stormy16.c (xstormy16_function_arg): Likewise.
	* config/tilegx/tilegx.c (tilegx_function_arg): Likewise.
	* config/tilepro/tilepro.c (tilepro_function_arg): Likewise.
	* config/v850/v850.c (v850_function_arg): Likewise.
	* config/vax/vax.c (vax_function_arg): Likewise.
	* config/visium/visium.c (visium_function_arg): Likewise.
	* config/xtensa/xtensa.c (xtensa_function_arg_1, xtensa_function_arg)
	(xtensa_function_incoming_arg): Likewise.

From-SVN: r274700

The hook is passed the promoted mode instead of the original type mode.

2019-08-20  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
	* target.def (setup_incoming_varargs): Take a function_arg_info
	instead of a mode and tree.
	* doc/tm.texi: Regenerate.
	* targhooks.h (default_setup_incoming_varargs): Take a
	function_arg_info instead of a mode and tree.
	* targhooks.c (default_setup_incoming_varargs): Likewise.
	* config/aarch64/aarch64.c (aarch64_setup_incoming_varargs): Likewise.
	* config/alpha/alpha.c (alpha_setup_incoming_varargs): Likewise.
	* config/arc/arc.c (arc_setup_incoming_varargs): Likewise.
	* config/arm/arm.c (arm_setup_incoming_varargs): Likewise.
	* config/bfin/bfin.c (setup_incoming_varargs): Likewise.
	* config/cris/cris.c (cris_setup_incoming_varargs): Likewise.
	* config/csky/csky.c (csky_setup_incoming_varargs): Likewise.
	* config/epiphany/epiphany.c (epiphany_setup_incoming_varargs):
	Likewise.
	* config/fr30/fr30.c (fr30_setup_incoming_varargs): Likewise.
	* config/frv/frv.c (frv_setup_incoming_varargs): Likewise.
	* config/ft32/ft32.c (ft32_setup_incoming_varargs): Likewise.
	* config/i386/i386.c (ix86_setup_incoming_varargs): Likewise.
	* config/ia64/ia64.c (ia64_setup_incoming_varargs): Likewise.
	* config/iq2000/iq2000.c (iq2000_setup_incoming_varargs): Likewise.
	* config/lm32/lm32.c (lm32_setup_incoming_varargs): Likewise.
	* config/m32r/m32r.c (m32r_setup_incoming_varargs): Likewise.
	* config/mcore/mcore.c (mcore_setup_incoming_varargs): Likewise.
	* config/mips/mips.c (mips_setup_incoming_varargs): Likewise.
	* config/mmix/mmix.c (mmix_setup_incoming_varargs): Likewise.
	* config/moxie/moxie.c (moxie_setup_incoming_varargs): Likewise.
	* config/nds32/nds32.c (nds32_setup_incoming_varargs): Likewise.
	* config/nios2/nios2.c (nios2_setup_incoming_varargs): Likewise.
	* config/riscv/riscv.c (riscv_setup_incoming_varargs): Likewise.
	* config/rs6000/rs6000-internal.h (setup_incoming_varargs): Likewise.
	* config/rs6000/rs6000-call.c (setup_incoming_varargs): Likewise.
	* config/sh/sh.c (sh_setup_incoming_varargs): Likewise.
	* config/spu/spu.c (spu_setup_incoming_varargs): Likewise.
	* config/tilegx/tilegx.c (tilegx_setup_incoming_varargs): Likewise.
	* config/tilepro/tilepro.c (tilepro_setup_incoming_varargs): Likewise.
	* config/visium/visium.c (visium_setup_incoming_varargs): Likewise.
	* function.c (assign_parms_setup_varargs): Update call to
	targetm.calls.setup_incoming_varargs.

From-SVN: r274699

The hook is passed the unpromoted type mode instead of the promoted mode.

2019-08-20  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
	* target.def (pass_by_reference): Take a function_arg_info instead
	of a mode, type and named flag.
	* doc/tm.texi: Regenerate.
	* targhooks.h (hook_pass_by_reference_must_pass_in_stack): Update
	accordingly.
	(hook_bool_CUMULATIVE_ARGS_arg_info_false): Declare.
	* targhooks.c (hook_pass_by_reference_must_pass_in_stack): Take a
	function_arg_info instead of a mode, type and named flag.
	(hook_bool_CUMULATIVE_ARGS_arg_info_false): New function.
	* calls.h (pass_by_reference): Take a function_arg_info instead of a
	mode, type and named flag.
	* calls.c (pass_by_reference): Likewise.
	(pass_va_arg_by_reference): Update call accordingly.
	(initialize_argument_information): Likewise.
	(emit_library_call_value_1): Likewise.
	* function.c (assign_parm_find_data_types): Likewise.
	* var-tracking.c (prepare_call_arguments): Likewise.
	* stor-layout.c: Include calls.h.
	(compute_record_mode): Update call to targetm.calls.pass_by_reference.
	* config/aarch64/aarch64.c (aarch64_pass_by_reference): Take a
	function_arg_info instead of a mode, type and named flag.
	* config/alpha/alpha.c (alpha_pass_by_reference): Likewise.
	* config/arc/arc.c (arc_pass_by_reference): Likewise.
	* config/arm/arm.c (arm_pass_by_reference): Likewise.
	* config/bfin/bfin.c (bfin_pass_by_reference): Likewise.
	* config/c6x/c6x.c (c6x_pass_by_reference): Likewise.
	(c6x_call_saved_register_used): Update call to pass_by_reference.
	* config/cris/cris.c (cris_pass_by_reference): Take a
	function_arg_info instead of a mode, type and named flag.
	* config/epiphany/epiphany.c (epiphany_pass_by_reference): Take a
	function_arg_info instead of a mode, type and named flag.
	(epiphany_arg_partial_bytes): Update call accordingly.
	* config/ft32/ft32.c (ft32_pass_by_reference): Take a
	function_arg_info instead of a mode, type and named flag.
	(ft32_arg_partial_bytes): Update call accordingly.
	* config/i386/i386.c (ix86_pass_by_reference): Take a
	function_arg_info instead of a mode, type and named flag.
	* config/iq2000/iq2000.c (iq2000_pass_by_reference): Likewise.
	* config/m32c/m32c.c (m32c_pass_by_reference): Likewise.
	* config/m32r/m32r.c (m32r_pass_by_reference): Likewise.
	(m32r_return_in_memory): Update call accordingly.
	* config/mips/mips.c (mips_pass_by_reference): Take a
	function_arg_info instead of a mode, type and named flag.
	* config/mmix/mmix.c (mmix_pass_by_reference): Likewise.
	* config/mn10300/mn10300.c (mn10300_pass_by_reference): Likewise.
	* config/moxie/moxie.c (moxie_pass_by_reference): Likewise.
	(moxie_arg_partial_bytes): Update call accordingly.
	* config/msp430/msp430.c (msp430_pass_by_reference): Take a
	function_arg_info instead of a mode, type and named flag.
	* config/nvptx/nvptx.c (nvptx_pass_by_reference): Likewise.
	* config/or1k/or1k.c (or1k_pass_by_reference): Likewise.
	* config/pa/pa.c (pa_pass_by_reference): Likewise.
	* config/riscv/riscv.c (riscv_pass_by_reference): Likewise.
	(riscv_return_in_memory): Update call accordingly.
	* config/rs6000/rs6000-internal.h (rs6000_pass_by_reference): Take a
	function_arg_info instead of a mode, type and named flag.
	* config/rs6000/rs6000-call.c (rs6000_pass_by_reference): Likewise.
	(rs6000_parm_needs_stack): Update call to pass_by_reference.
	* config/s390/s390.c (s390_pass_by_reference): Take a
	function_arg_info instead of a mode, type and named flag.
	(s390_call_saved_register_used): Update call accordingly.
	* config/sh/sh.c (sh_pass_by_reference): Take a function_arg_info
	instead of a mode, type and named flag.
	* config/sparc/sparc.c (sparc_pass_by_reference): Likewise.
	* config/spu/spu.c (spu_pass_by_reference): Likewise.
	* config/tilegx/tilegx.c (tilegx_pass_by_reference): Likewise.
	* config/tilepro/tilepro.c (tilepro_pass_by_reference): Likewise.
	* config/v850/v850.c (v850_pass_by_reference): Likewise.
	* config/visium/visium.c (visium_pass_by_reference): Likewise.

gcc/ada/
	* gcc-interface/misc.c (default_pass_by_ref): Update call to
	pass_by_reference.

From-SVN: r274698

This patch adds the function_arg_info class and uses it for
TARGET_ARG_PARTIAL_BYTES.

The hook is passed the promoted mode instead of the original type mode.

The arguments aren't mentioned in the documentation, which is why the
target.def change is so small.

The patch changes "true" to "arg.named" in:

  gcc_assert (!epiphany_pass_by_reference (cum, mode, type, /* named */ true));

but epiphany_pass_by_reference doesn't care about the named flag.

2019-08-20  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
	* target.def (arg_partial_bytes): Take a function_arg_info instead
	of a mode, type and named flag.
	* doc/tm.texi: Regenerate.
	* target.h (function_arg_info): Declare.
	* calls.h (function_arg_info): New class.
	* targhooks.h (hook_int_CUMULATIVE_ARGS_mode_tree_bool_0): Delete.
	(hook_int_CUMULATIVE_ARGS_arg_info_0): Declare.
	* targhooks.c (hook_int_CUMULATIVE_ARGS_mode_tree_bool_0): Delete.
	(hook_int_CUMULATIVE_ARGS_arg_info_0): New function.
	* calls.c (initialize_argument_information): Update call to
	targetm.calls.partial_bytes.
	(emit_library_call_value_1): Likewise.
	* expr.c (block_move_libcall_safe_for_call_parm): Likewise.
	* function.c (assign_parm_find_entry_rtl): Likewise.
	* config/alpha/alpha.c (alpha_arg_partial_bytes): Take a
	function_arg_info instead of a mode, type and named flag.
	* config/arc/arc.c (arc_arg_partial_bytes): Likewise.
	* config/arm/arm.c (arm_arg_partial_bytes): Likewise.
	(cmse_func_args_or_return_in_stack): Update accordingly.
	* config/bfin/bfin.c (bfin_arg_partial_bytes): Take a
	function_arg_info instead of a mode, type and named flag.
	* config/cris/cris.c (cris_arg_partial_bytes): Likewise.
	* config/csky/csky.c (csky_arg_partial_bytes): Likewise.
	* config/epiphany/epiphany.c (epiphany_arg_partial_bytes): Likewise.
	* config/fr30/fr30.c: Include calls.h.
	(fr30_arg_partial_bytes): Take a function_arg_info instead of a mode,
	type and named flag.
	* config/frv/frv.c: Include calls.h.
	(frv_arg_partial_bytes): Take a function_arg_info instead of a mode,
	type and named flag.
	* config/ft32/ft32.c (ft32_arg_partial_bytes): Likewise.
	* config/gcn/gcn.c (gcn_arg_partial_bytes): Likewise.
	* config/ia64/ia64.c (ia64_arg_partial_bytes): Likewise.
	* config/iq2000/iq2000.c (iq2000_arg_partial_bytes): Likewise.
	* config/m32r/m32r.c (m32r_arg_partial_bytes): Likewise.
	* config/mcore/mcore.c (mcore_arg_partial_bytes): Likewise.
	* config/microblaze/microblaze.c (function_arg_partial_bytes):
	Likewise.
	* config/mips/mips.c (mips_arg_partial_bytes): Likewise.
	* config/mn10300/mn10300.c (mn10300_arg_partial_bytes): Likewise.
	* config/moxie/moxie.c (moxie_arg_partial_bytes): Likewise.
	* config/msp430/msp430.c (msp430_arg_partial_bytes): Likewise.
	* config/nds32/nds32.c (nds32_arg_partial_bytes): Likewise.
	* config/nios2/nios2.c (nios2_arg_partial_bytes): Likewise.
	* config/pa/pa.c (pa_arg_partial_bytes): Likewise.
	* config/pru/pru.c (pru_arg_partial_bytes): Likewise.
	* config/riscv/riscv.c (riscv_arg_partial_bytes): Likewise.
	* config/rs6000/rs6000-internal.h (rs6000_arg_partial_bytes): Likewise.
	* config/rs6000/rs6000-call.c (rs6000_arg_partial_bytes): Likewise.
	(rs6000_parm_needs_stack): Update call accordingly.
	* config/sh/sh.c (sh_arg_partial_bytes): Take a
	function_arg_info instead of a mode, type and named flag.
	* config/sparc/sparc.c (sparc_arg_partial_bytes): Likewise.
	* config/v850/v850.c (v850_arg_partial_bytes): Likewise.

From-SVN: r274697

This patch splits out another idiom from the va_arg gimplification
routines, so that there's only one place to update later.

2019-08-20  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
	* calls.h (must_pass_va_arg_in_stack): Declare.
	* calls.c (must_pass_va_arg_in_stack): New function.
	* config/alpha/alpha.c (alpha_gimplify_va_arg_1): Use it.
	* config/sh/sh.c (sh_gimplify_va_arg_expr): Likewise.
	* config/stormy16/stormy16.c (xstormy16_gimplify_va_arg_expr):
	Likewise.
	* config/xtensa/xtensa.c (xtensa_gimplify_va_arg_expr): Likewise.

From-SVN: r274696

This patch splits out a common idiom from the va_arg gimplification
routines, so that there's only one place to update later.

2019-08-20  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
	* calls.h (pass_va_arg_by_reference): Declare.
	* calls.c (pass_va_arg_by_reference): New function.
	* config/aarch64/aarch64.c (aarch64_gimplify_va_arg_expr): Use it.
	* config/alpha/alpha.c (alpha_gimplify_va_arg): Likewise.
	* config/gcn/gcn.c (gcn_gimplify_va_arg_expr): Likewise.
	* config/i386/i386.c (ix86_gimplify_va_arg): Likewise.
	* config/ia64/ia64.c (ia64_gimplify_va_arg): Likewise.
	* config/mips/mips.c (mips_std_gimplify_va_arg_expr): Likewise.
	(mips_gimplify_va_arg_expr): Likewise.
	* config/msp430/msp430.c (msp430_gimplify_va_arg_expr): Likewise.
	* config/pa/pa.c (hppa_gimplify_va_arg_expr): Likewise.
	* config/rs6000/rs6000-call.c (rs6000_gimplify_va_arg): Likewise.
	* config/s390/s390.c (s390_gimplify_va_arg): Likewise.
	* config/sparc/sparc.c (sparc_gimplify_va_arg): Likewise.
	* config/spu/spu.c (spu_gimplify_va_arg_expr): Likewise.
	* config/tilegx/tilegx.c (tilegx_gimplify_va_arg_expr): Likewise.
	* config/tilepro/tilepro.c (tilepro_gimplify_va_arg_expr): Likewise.
	* config/visium/visium.c (visium_gimplify_va_arg): Likewise.
	* config/xtensa/xtensa.c (xtensa_gimplify_va_arg_expr): Likewise.
	* targhooks.c (std_gimplify_va_arg_expr): Likewise.

From-SVN: r274695

2019-08-20  Richard Biener  <rguenther@suse.de>

	PR target/91498
	* config/i386/i386-features.c (general_scalar_chain::convert_op):
	Use (vec_merge (vec_duplicate..)) style vector from scalar move.
	(convert_scalars_to_vector): Add timode_p parameter and use it
	to guard TImode-only operation.
	(pass_stv::gate): Adjust so STV runs twice for TARGET_64BIT.
	(pass_stv::execute): Pass down timode_p.

	* gcc.target/i386/minmax-7.c: New testcase.

From-SVN: r274694

2019-08-20  Lili Cui  <lili.cui@intel.com>

gcc/
	* common/config/i386/i386-common.c
	(processor_names): Add tigerlake and cooperlake.
	(processor_alias_table): Add tigerlake and cooperlake.
	* config.gcc: Add -march=tigerlake and cooperlake.
	* config/i386/driver-i386.c
	(host_detect_local_cpu): Detect tigerlake and cooperlake.
	Add "has_avx" to classify processor.
	* config/i386/i386-builtins.c (processor_model):
	Add M_INTEL_COREI7_TIGERLAKE and M_INTEL_COREI7_COOPERLAKE.
	(arch_names_table): Add tigerlake and cooperlake.
	(get_builtin_code_for_version) : Handle PROCESSOR_TIGERLAKE and
	PROCESSOR_COOPERLAKE.
	* config/i386/i386-c.c
	(ix86_target_macros_internal): Handle tigerlake and cooperlake.
	* config/i386/i386-options.c
	(m_TIGERLAKE)  : Define.
	(m_COOPERLAKE) : Ditto.
	(m_CORE_AVX512): Ditto.
	(processor_cost_table): Add cascadelake.
	(ix86_option_override_internal): Hadle PTA_MOVDIRI, PTA_MOVDIR64B.
	* config/i386/i386.h
	(ix86_size_cost) : Define TARGET_TIGERLAKE and TARGET_COOPERLAKE.
	(processor_type) : Add PROCESSOR_TIGERLAKE and PROCESSOR_COOPERLAKE.
	(PTA_MOVDIRI): Ditto.
	(PTA_MOVDIR64B): Ditto.
	(PTA_COOPERLAKE) : Ditto.
	(PTA_TIGERLAKE)  : Ditto.
	(processor_type) : Add PROCESSOR_TIGERLAKE and PROCESSOR_COOPERLAKE.
	* doc/extend.texi: Add tigerlake and cooperlake.
	* doc/invoke.texi: Add tigerlake and cooperlake.

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

libgcc/
	* config/i386/cpuinfo.h: Add INTEL_COREI7_TIGERLAKE and
	INTEL_COREI7_COOPERLAKE.

From-SVN: r274693

	* doc/install.texi (Specific, alpha): Remove note to use
	binutils 2.11.2 or later.

From-SVN: r274692

re PR middle-end/89544 (Argument marshalling incorrectly assumes stack slots are naturally aligned.)

2019-08-20  Bernd Edlinger  <bernd.edlinger@hotmail.de>

        PR middle-end/89544
        * function.c (assign_parm_find_stack_rtl): Use larger alignment
        when possible.

testsuite:
2019-08-20  Bernd Edlinger  <bernd.edlinger@hotmail.de>

        PR middle-end/89544
        * gcc.target/arm/unaligned-argument-1.c: New test.
        * gcc.target/arm/unaligned-argument-2.c: New test.

From-SVN: r274691

From-SVN: r274689

    
    Add new hooks for dumping named objects, package bindings,
    and top level Gogo package list.
    
    Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/190877

From-SVN: r274682

    
    With CL 190599, along with what we do in greyobject, we ensure
    that we only mark allocated heap objects. As a result we can be
    more strict in GC:
    
    - Enable "sweep increased allocation count" check, which checks
      that the number of mark bits set are no more than the number of
      allocation bits.
    
    - Enable invalid pointer check on heap scan. We only trace
      allocated heap objects, which should not contain invalid
      pointer.
    
    This also makes the libgo runtime more convergent with the gc
    runtime.
    
    Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/190797

From-SVN: r274678

gcc/ChangeLog:
2019-08-19  Joel Hutton  <Joel.Hutton@arm.com>

	* config/aarch64/aarch64-protos.h (aarch64_fpconst_pow2_recip): New prototype
	* config/aarch64/aarch64.c (aarch64_fpconst_pow2_recip): New function
	* config/aarch64/aarch64.md (*aarch64_<su_optab>cvtf<fcvt_target><GPF:mode>2_mult): New pattern
	(*aarch64_<su_optab>cvtf<fcvt_iesize><GPF:mode>2_mult): New pattern
	* config/aarch64/constraints.md (Dt): New constraint
	* config/aarch64/predicates.md (aarch64_fpconst_pow2_recip): New predicate

gcc/testsuite/ChangeLog:
2019-08-19  Joel Hutton  <Joel.Hutton@arm.com>

	* gcc.target/aarch64/fmul_scvtf_1.c: New test.

From-SVN: r274676

gdb should normally not be linked with -static-libstdc++.  Currently
this has not caused problems, but it's incompatible with catching an
exception thrown from a shared library -- and a subsequent patch
changes gdb to do just this.

This patch adds a new --with-static-standard-libraries flag to the
top-level configure.  It defaults to "auto", which means enabled if
gcc is being built, and disabled otherwise.

ChangeLog
2019-08-19  Tom Tromey  <tom@tromey.com>

	* configure: Rebuild.
	* configure.ac: Add --with-static-standard-libraries.

From-SVN: r274673

2019-08-19  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/91403
	* tree-scalar-evolution.c (follow_ssa_edge_binary): Inline
	cases we can handle with tail-recursion...
	(follow_ssa_edge_expr): ... here.  Do so.

From-SVN: r274672

	* constexpr.c (modifying_const_object_error): New function.
	(cxx_eval_call_expression): Set TREE_READONLY on a CONSTRUCTOR of
	a const-qualified object after it's been fully constructed.
	(modifying_const_object_p): New function.
	(cxx_eval_store_expression): Detect modifying a const object
	during constant expression evaluation.
	(cxx_eval_increment_expression): Use a better location when building
	up the store.
	(cxx_eval_constant_expression) <case DECL_EXPR>: Mark a constant
	object's constructor TREE_READONLY.

	* g++.dg/cpp1y/constexpr-tracking-const1.C: New test.
	* g++.dg/cpp1y/constexpr-tracking-const2.C: New test.
	* g++.dg/cpp1y/constexpr-tracking-const3.C: New test.
	* g++.dg/cpp1y/constexpr-tracking-const4.C: New test.
	* g++.dg/cpp1y/constexpr-tracking-const5.C: New test.
	* g++.dg/cpp1y/constexpr-tracking-const6.C: New test.
	* g++.dg/cpp1y/constexpr-tracking-const7.C: New test.
	* g++.dg/cpp1y/constexpr-tracking-const8.C: New test.
	* g++.dg/cpp1y/constexpr-tracking-const9.C: New test.
	* g++.dg/cpp1y/constexpr-tracking-const10.C: New test.
	* g++.dg/cpp1y/constexpr-tracking-const11.C: New test.
	* g++.dg/cpp1y/constexpr-tracking-const12.C: New test.
	* g++.dg/cpp1y/constexpr-tracking-const13.C: New test.
	* g++.dg/cpp1y/constexpr-tracking-const14.C: New test.

From-SVN: r274671

In the section "BOZ Literal constants" delete paragraph about integer
overload errors when initialising integer variables with BOZ constants
as these no longer occur.

From-SVN: r274667

2019-08-19  Bob Duff  <duff@adacore.com>

gcc/ada/

	* doc/gnat_rm/implementation_advice.rst: Fix documentation for
	stream oriented attributes.
	* gnat_rm.texi: Regenerate.

From-SVN: r274666

2019-08-19  Gary Dismukes  <dismukes@adacore.com>

gcc/ada/

	* einfo.ads (E_Function, E_Procedure): Update comments to
	reflect that Renamed_Entity is also used for nongeneric
	subprograms.

From-SVN: r274665

This fixes a bogus compilation error when a unit with SPARK_Mode
containing a pragma Elaborate_Body is with-ed by a generic unit
containing an inlined subprogram, and front-end inlining is enabled.

2019-08-19  Eric Botcazou  <ebotcazou@adacore.com>

gcc/ada/

	* sem_prag.adb (Is_Before_First_Decl): Deal with rewritten
	pragmas.

gcc/testsuite/

	* gnat.dg/elab8.adb, gnat.dg/elab8_gen.adb,
	gnat.dg/elab8_gen.ads, gnat.dg/elab8_pkg.adb,
	gnat.dg/elab8_pkg.ads: New testcase.

From-SVN: r274664

If the -gnatwf switch is used to activate warnings on unreferenced
formal parameters, the warning is no longer given if the subprogram is
dispatching, because such warnings tend to be noise. It is quite common
to have a parameter that is necessary just because the subprogram is
overriding, or just because we need a controlling parameter for the
dispatch.

2019-08-19  Bob Duff  <duff@adacore.com>

gcc/ada/

	* sem_warn.adb (Warn_On_Unreferenced_Entity): Suppress warning
	on formal parameters of dispatching operations.

gcc/testsuite/

	* gnat.dg/warn29.adb, gnat.dg/warn29.ads: New testcase.

From-SVN: r274663

This patch fixes a compiler abort on an object declaration for a
class-wide type whose expression is a call to an expression function
that returns type extension.

2019-08-19  Ed Schonberg  <schonberg@adacore.com>

gcc/ada/

	* sem_res.adb (Resolve_Call): A call to an expression function
	freezes when expander is active, unless the call appears within
	the body of another expression function,

gcc/testsuite/

	* gnat.dg/expr_func9.adb: New testcase.

From-SVN: r274662

The new routines convert back and forth between private type OS_Time and
a long integer which can be used in package Ada.Calendar.Conversions
routines to convert to Ada.Calendar.Time.

2019-08-19  Dmitriy Anisimkov  <anisimko@adacore.com>

gcc/ada/

	* libgnat/s-os_lib.ads, libgnat/s-os_lib.adb (To_Ada, To_C): New
	routines.

From-SVN: r274661