From-SVN: r193243

	PR middle-end/41993
	* gcc.dg/torture/pr41993.c: New test.

From-SVN: r193242

	* gcc.target/i386/l_fma_float_?.c: Update.
	* gcc.target/i386/l_fma_double_?.c: Update.

	* tree-vect-loop-manip.c (vect_do_peeling_for_loop_bound,
	vect_do_peeling_for_alignment): Fix loop bound computation.
	* tree-vect-loop.c (vect_transform_loop): Maintain loop bounds.

From-SVN: r193241

	* Makefile.in (osconstool): Revert previous change, still needed
	after all. Add call to copy-s-oscons target.

From-SVN: r193240

From-SVN: r193239

2012-11-06  Robert Dewar  <dewar@adacore.com>

	* err_vars.ads, atree.ads: Minor reformatting.

2012-11-06  Arnaud Charlet  <charlet@adacore.com>

	* gcc-interface/Make-lang.in: Update dependencies.
	* gcc-interface/Makefile.in: Add runtime pairs for Android.
	Rework handling of s-oscons.ads.
	* s-osinte-android.ads, s-osinte-android.adb: New files.

2012-11-06  Tristan Gingold  <gingold@adacore.com>

	* gcc-interface/trans.c (gnat_to_gnu): For N_Real_Literal, create the
	binary representation of vax floats.

From-SVN: r193238

From-SVN: r193237

	PR target/54089
	* config/sh/sh.c (and_xor_ior_costs, addsubcosts): Double the costs for
	ops larger than SImode.
	* config/sh/sh.md (rotcl, *rotcl): New insns and splits.
	(ashldi3_k): Convert to insn_and_split and use new rotcl insn.

	PR target/54089
	* gcc.target/sh/pr54089-8.c: New.
	* gcc.target/sh/pr54089-9.c: New.

From-SVN: r193236

2012-11-06  Tristan Gingold  <gingold@adacore.com>

	* sem_ch9.adb (Analyze_Protected_Type_Declaration): Fix thinko
	in previous commit.

2012-11-06  Jose Ruiz  <ruiz@adacore.com>

	* ali.adb (Scan_ALI): Fix parsing mechanism for -fstack-check.

2012-11-06  Thomas Quinot  <quinot@adacore.com>

	* atree.adb, atree.ads, einfo.adb, errout.adb, errout.ads, erroutc.adb,
	erroutc.ads, errutil.adb, errutil.ads, err_vars.ads, expander.adb,
	exp_ch13.adb, exp_ch2.adb, exp_ch6.adb, exp_dist.adb, fe.h,
	fmap.adb, fmap.ads, gprep.adb, makeutl.adb, osint.adb, osint.ads,
	par_sco.adb, prepcomp.adb, prj-part.adb, prj-proc.adb, scng.adb,
	sdefault.ads, sem_ch10.adb, sem_ch13.adb, sem_ch2.adb, sem_ch3.adb,
	sem_ch4.adb, sem_ch5.adb, sem_dim.adb, sem_elab.adb, sem_eval.adb,
	sem_intr.adb, sem_prag.adb, sem_type.adb, sem_warn.adb, stylesw.adb,
	stylesw.ads, targparm.adb, targparm.ads (Cascaded_Error): Rename to
	more descriptive name 'Check_Error_Detected'. Add calls to
	Check_Error_Detected at places where semantic analysis is abandoned
	assuming a previously detected error.

From-SVN: r193235

2012-11-06  Robert Dewar  <dewar@adacore.com>

	* exp_ch4.adb: Minor comment change.

2012-11-06  Robert Dewar  <dewar@adacore.com>

	* gnat_ugn.texi: Extensive revision of documentation of overflow
	checking.
	* vms_data.ads: Overflow check numbers must be in range 1-3,
	not 0-3.

2012-11-06  Tristan Gingold  <gingold@adacore.com>

	* sem_ch9.adb (Analyze_Protected_Type_Declaration): Emit a
	warning if pragma Priority is used in presence of an interrupt
	handler.

From-SVN: r193234

2012-11-06  Robert Dewar  <dewar@adacore.com>

	* checks.ads, checks.adb, exp_ch4.adb: Minor changes throughout for
	new overflow checking.
	* exp_util.adb (Insert_Actions): Remove special casing of
	Overflow_Check.
	* gnat1drv.adb (Adjust_Global_Switches): Fixes for new handling
	of overflow checks.
	* sem.adb (Analyze): Remove special casing of Overflow_Check
	(Analyze_List): ditto.
	* sem_prag.adb (Analyze_Pragma, case Overflow_Checks): Remove
	SUPPRESSED and change CHECKED to STRICT.
	* sem_res.adb (Analyze_And_Resolve): No longer treat
	Overflow_Check specially.
	(Preanalyze_And_Resolve): ditto.
	(Resolve): ditto.
	* snames.ads-tmpl: Replace Name_Checked by Name_Strict.
	* switch-c.adb (Get_Overflow_Mode): Eliminate 0 setting,
	CHECKED => STRICT.
	* types.ads (Overflow_Check_Type): Remove Suppressed, change
	Checked to Strict (Suppress_Record): Overflow check controlled
	by Suppress array.

From-SVN: r193233

2012-11-06  Paolo Carlini  <paolo.carlini@oracle.com>
  
	* include/bits/atomic_base.h: Don't include <cstddef>, use nullptr.
	* include/std/atomic: Likewise.
	* include/tr2/dynamic_bitset: Likewise.

	* libsupc++/vec.cc (compute_size(std::size_t, std::size_t,
	std::size_t)): Fix for -fno-exceptions.

From-SVN: r193232

2012-11-06  Ed Schonberg  <schonberg@adacore.com>

	* sem_res.adb (Preanalyze_And_Resolve): In Alfa mode do not
	disable checks, so that flags can be properly set on expressions
	that are not further expanded.

From-SVN: r193231

2012-11-06  Robert Dewar  <dewar@adacore.com>

	* exp_attr.adb, sem_attr.adb: Minor reformatting.

From-SVN: r193230

        * config/i386/i386-protos.h (emit_i387_cw_initialization): Deleted.
        (emit_vzero): Added prototype.
        (ix86_mode_entry): Likewise.
        (ix86_mode_exit): Likewise.
        (ix86_emit_mode_set): Likewise.

        * config/i386/i386.c (typedef struct block_info_def): Deleted.
        (define BLOCK_INFO): Deleted.
        (check_avx256_stores): Added checking for MEM_P.
        (move_or_delete_vzeroupper_2): Deleted.
        (move_or_delete_vzeroupper_1): Deleted.
        (move_or_delete_vzeroupper): Deleted.
        (ix86_maybe_emit_epilogue_vzeroupper): Deleted.
        (function_pass_avx256_p): Deleted.
        (ix86_function_ok_for_sibcall): Deleted disabling sibcall.
        (nit_cumulative_args): Deleted initialization of of avx256 fields of
        cfun->machine.
        (ix86_emit_restore_sse_regs_using_mov): Deleted vzeroupper generation.
        (ix86_expand_epilogue): Likewise.
        (ix86_avx_u128_mode_needed): New.
        (ix86_i387_mode_needed): Renamed ix86_mode_needed.
        (ix86_mode_needed): New.
        (ix86_avx_u128_mode_after): New.
        (ix86_mode_after): New.
        (ix86_avx_u128_mode_entry): New.
        (ix86_mode_entry): New.
        (ix86_avx_u128_mode_exit): New.
        (ix86_mode_exit): New.
        (ix86_emit_mode_set): New.
        (ix86_expand_call): Deleted vzeroupper generation.
        (ix86_split_call_vzeroupper): Deleted.
        (ix86_init_machine_status): Initialzed optimize_mode_switching.
        (ix86_expand_special_args_builtin): Changed.
        (ix86_reorg): Deleted a call of move_or_delete_vzeroupper.

        * config/i386/i386.h  (VALID_AVX256_REG_OR_OI_MODE): New.
        (AVX_U128): New.
        (avx_u128_state): New.
        (NUM_MODES_FOR_MODE_SWITCHING): Added AVX_U128_ANY.
        (MODE_AFTER): New.
        (MODE_ENTRY): New.
        (MODE_EXIT): New.
        (EMIT_MODE_SET): Changed.
        (machine_function): Deleted avx256 fields.

        * config/i386/i386.md (UNSPEC_CALL_NEEDS_VZEROUPPER): Deleted.
        (define_insn_and_split "*call_vzeroupper"): Deleted.
        (define_insn_and_split "*call_rex64_ms_sysv_vzeroupper"): Deleted.
        (define_insn_and_split "*sibcall_vzeroupper"): Deleted.
        (define_insn_and_split "*call_pop_vzeroupper"): Deleted.
        (define_insn_and_split "*sibcall_pop_vzeroupper"): Deleted.
        (define_insn_and_split "*call_value_vzeroupper"): Deleted.
        (define_insn_and_split "*sibcall_value_vzeroupper"): Deleted.
        (define_insn_and_split "*call_value_rex64_ms_sysv_vzeroupper"): Deleted.
        (define_insn_and_split "*call_value_pop_vzeroupper"): Deleted.
        (define_insn_and_split "*sibcall_value_pop_vzeroupper"): Deleted.
        (define_expand "return"): Deleted vzeroupper emitting.
        (define_expand "simple_return"): Deleted.

        * config/i386/predicates.md (vzeroupper_operation): New.

        * config/i386/sse.md (avx_vzeroupper): Changed.

testsuite/ChangeLog:
        * gcc.target/i386/avx-vzeroupper-5.c: Changed scan-assembler-times.
        * gcc.target/i386/avx-vzeroupper-8.c: Likewise.
        * gcc.target/i386/avx-vzeroupper-9.c: Likewise.
        * gcc.target/i386/avx-vzeroupper-10.c: Likewise.
        * gcc.target/i386/avx-vzeroupper-11.c: Likewise.
        * gcc.target/i386/avx-vzeroupper-12.c: Likewise.
        * gcc.target/i386/avx-vzeroupper-19.c: Likewis.
        * gcc.target/i386/avx-vzeroupper-27.c: New.

From-SVN: r193229

exp_attr.adb (Expand_N_Attribute_Reference): Apply a predicate check when evaluating the attribute Valid...

2012-11-06  Gary Dismukes  <dismukes@adacore.com>

	* exp_attr.adb (Expand_N_Attribute_Reference): Apply a predicate
	check when evaluating the attribute Valid, and issue a warning
	about infinite recursion when the check occurs within the
	predicate function of the prefix's subtype.
	* exp_ch4.adb (Expand_N_In): Remove test for Is_Discrete_Type
	when we're checking that there's no predicate check function as a
	condition for substituting a Valid check for a scalar membership
	test (substitution should be suppressed for any kind of scalar
	subtype with a predicate check). Also, don't emit a predicate
	check when the right operand is a range.

From-SVN: r193228

2012-11-06  Robert Dewar  <dewar@adacore.com>

	* par_sco.adb, bindgen.adb, exp_vfpt.adb, exp_vfpt.ads, exp_ch2.adb,
	errout.adb, sem_ch8.adb: Minor reformatting.

2012-11-06  Hristian Kirtchev  <kirtchev@adacore.com>

	* einfo.adb: Include Loop_Entry_Attributes to the list of
	Node/List/Elist10 usage.
	(Loop_Entry_Attributes): New routine.
	(Set_Loop_Entry_Attributes): New routine.
	(Write_Field10_Name): Add an output string for Loop_Entry_Attributes.
	* einfo.ads: Define new attribute Loop_Entry_Attributes along
	with its usage in nodes.
	(Loop_Entry_Attributes): New routine and dedicated pragma Inline.
	(Set_Loop_Entry_Attributes): New routine and dedicated pragma Inline.
	* exp_attr.adb (Expand_N_Attribute_Reference): Do not expand
	Attribute_Loop_Entry here.
	* exp_ch5.adb: Add with and use clause for Elists;
	(Expand_Loop_Entry_Attributes): New routine.
	(Expand_N_Loop_Statement): Add a call to Expand_Loop_Entry_Attributes.
	* exp_prag.adb (Expand_Pragma_Loop_Assertion): Specialize the
	search to include multiple nested loops produced by the expansion
	of Ada 2012 array iterator.
	* sem_attr.adb: Add with and use clause for Elists.
	(Analyze_Attribute): Check the legality of attribute Loop_Entry.
	(Resolve_Attribute): Nothing to do for Loop_Entry.
	(S14_Attribute): New routine.
	* snames.ads-tmpl: Add a comment on entries marked with
	HiLite. Add new name Name_Loop_Entry. Add new attribute
	Attribute_Loop_Entry.

From-SVN: r193227

2012-11-06  Janus Weil  <janus@gcc.gnu.org>

	PR fortran/54917
	* target-memory.c (gfc_target_expr_size,gfc_target_interpret_expr):
	Handle BT_CLASS.
	* trans-intrinsic.c (gfc_conv_intrinsic_transfer): Add support for
	polymorphic arguments.

2012-11-06  Janus Weil  <janus@gcc.gnu.org>

	PR fortran/54917
	* gfortran.dg/transfer_class_1.f90: New.
	* gfortran.dg/transfer_class_2.f90: New.

From-SVN: r193226

2012-11-06  Geert Bosch  <bosch@adacore.com>

	* eval_fat.adb (Machine, Succ): Fix front end to support static
	evaluation of attributes on targets with both VAX and IEEE float.
	* sem_util.ads, sem_util.adb (Has_Denormals, Has_Signed_Zeros):
	New type-specific functions. Previously we used Denorm_On_Target
	and Signed_Zeros_On_Target directly, but that doesn't work well
	for OpenVMS where a single target supports both floating point
	with and without signed zeros.
	* sem_attr.adb (Attribute_Denorm, Attribute_Signed_Zeros): Use
	new Has_Denormals and Has_Signed_Zeros functions to support both
	IEEE and VAX floating point on a single target.

2012-11-06  Tristan Gingold  <gingold@adacore.com>

	* bindgen.adb (System_Interrupts_Used): New variable.
	(Gen_Adainit): Declare and call
	Install_Restricted_Handlers_Sequential if System.Interrupts is
	used when elaboration policy is sequential.

2012-11-06  Ed Schonberg  <schonberg@adacore.com>

	* sem_ch8.adb: Complete previous change.

From-SVN: r193225

2012-11-06  Tristan Gingold  <gingold@adacore.com>

	* fe.h (Get_Vax_Real_Literal_As_Signed): Declare.
	* eval_fat.adb, eval_fat.ads (Decompose_Int): Move spec in package spec.
	* exp_vfpt.adb, exp_vfpt.ads (Vax_Real_Literal_As_Signed): New function.
	(Expand_Vax_Real_Literal): Remove.
	* exp_ch2.adb (Expand_N_Real_Literal): Do nothing.
	* sem_eval.adb (Expr_Value_R): Remove special Vax float case,
	as this is not anymore a special case.

2012-11-06  Yannick Moy  <moy@adacore.com>

	* uintp.ads: Minor correction of typo in comment.

2012-11-06  Ed Schonberg  <schonberg@adacore.com>

	* sem_prag.adb (Analyze_Pragnma, case Unchecked_Union): remove
	requirement that discriminants of an unchecked_union must have
	defaults.

2012-11-06  Vasiliy Fofanov  <fofanov@adacore.com>

	* projects.texi: Minor wordsmithing.

From-SVN: r193224

2012-11-06  Robert Dewar  <dewar@adacore.com>

	* sem_ch9.adb, exp_vfpt.adb, xoscons.adb: Minor reformatting.

From-SVN: r193223

2012-11-06  Tristan Gingold  <gingold@adacore.com>

	* exp_vfpt.adb: Document VAX float point layout.

2012-11-06  Geert Bosch  <bosch@adacore.com>

	* eval_fat.adb (Machine): Don't return -0.0 on targets without
	signed zeros.

2012-11-06  Ed Schonberg  <schonberg@adacore.com>

	* sem_ch9.adb (Analyze_Entry_Call_Alternative,
	Check_Triggering_Statement): Reject properly an indirect call.

From-SVN: r193222

2012-11-06  Pascal Obry  <obry@adacore.com>

	* xoscons.adb, xutil.adb, xutil.ads: Add support for post-processing.

From-SVN: r193221

2012-11-06  Yannick Moy  <moy@adacore.com>

	* s-bignum.adb (Div_Rem): Fix another bug in step D3.

2012-11-06  Tristan Gingold  <gingold@adacore.com>

	* s-tarest.adb (Create_Restricted_Task): Call
	Create_Restricted_Task_Sequential in sequential case.

2012-11-06  Hristian Kirtchev  <kirtchev@adacore.com>

	* exp_prag.adb (Expand_Pragma_Loop_Assertion): Do not rewrite the
	pragma into a null statement as its presence is desirable in -gnatG
	output.

From-SVN: r193219

2012-11-06  Ed Schonberg  <schonberg@adacore.com>

	* sem_ch8.adb (Check_Constrained_Object): Do nothing if the
	renamed object is a limited record.

2012-11-06  Bernard Banner  <banner@adacore.com>

	* sysdep.c (_getpagesize): New. Minor reformatting.

From-SVN: r193218

2012-11-06  Robert Dewar  <dewar@adacore.com>

	* sem_prag.adb: Minor reformatting.

2012-11-06  Robert Dewar  <dewar@adacore.com>

	* s-bignum.adb (Div_Rem): Fix bug in step D3.
	* uintp.adb (UI_Div_Rem): Add comment on bug in step D3.

From-SVN: r193217

2012-11-06  Hristian Kirtchev  <kirtchev@adacore.com>

	* exp_prag.adb (Expand_Pragma_Loop_Assertion): Update the comment
	on intended expansion.	Reimplement the logic which expands the
	termination variants.
	(Process_Increase_Decrease): Update the parameter profile and the
	comment related to it. Accommodate the new aggregate-like appearance of
	the termination variants.
	* sem_prag.adb (Analyze_Pragma): Update the syntax of pragma
	Loop_Assertion. Reimplement the semantic analysis of the pragma
	to accommodate the new aggregate-like variant.
	(Check_Variant): New routine.
	* snames.ads-tmpl: Change names Name_Decreases and Name_Increases
	to Name_Decreasing and Name_Increasing respectively. Add name
	Variant.

2012-11-06  Ed Schonberg  <schonberg@adacore.com>

	* sem_eval.adb: Static evaluation of case expressions.

From-SVN: r193216

2012-11-06  Robert Dewar  <dewar@adacore.com>

	* exp_prag.adb, impunit.adb, exp_ch9.adb, par-ch4.adb,
	s-tarest.adb: Minor reformatting.

2012-11-06  Tristan Gingold  <gingold@adacore.com>

	* s-tposen.ads: Minor comment update.

2012-11-06  Arnaud Charlet  <charlet@adacore.com>

	* sysdep.c: Rename sig* wrappers to use unique names.

2012-11-06  Yannick Moy  <moy@adacore.com>

	* exp_dbug.adb (Qualify_Entity_Name): Mark entity as having a qualified
	name after being treated, in formal verification mode.

2012-11-06  Fedor Rybin  <frybin@adacore.com>

	* gnat_ugn.texi: Updating gnattest section to reflect changes
	in default behaviour of the tool.

From-SVN: r193215

2012-11-06  Thomas Quinot  <quinot@adacore.com>

	* s-oscons-tmplt.c: Interfaces.C now needs to be WITH'd even
	on platforms that do not support sockets (for the benefit of
	subtype IOCTL_Req_T).

2012-11-06  Ed Schonberg  <schonberg@adacore.com>

	* par-ch4.adb (P_Primary): if-expressions, case-expressions,
	and quantified expressions are legal if surrounded by parentheses
	from an enclosing context, such as a call or an instantiation.

2012-11-06  Yannick Moy  <moy@adacore.com>

	* impunit.adb (Get_Kind_Of_Unit): Return appropriate kind for
	predefined implementation files, instead of returning
	Not_Predefined_Unit on all .adb files.

2012-11-06  Tristan Gingold  <gingold@adacore.com>

	* exp_ch9.adb (Build_Activation_Chain_Entity): Return immediately if
	partition elaboration policy is sequential.
	(Build_Task_Activation_Call): Likewise. Use
	Activate_Restricted_Tasks on restricted profile.
	(Make_Task_Create_Call): Do not use the _Chain
	parameter if elaboration policy is sequential. Call
	Create_Restricted_Task_Sequential in that case.
	* exp_ch3.adb (Build_Initialization_Call): Change condition to
	support concurrent elaboration policy.
	(Build_Record_Init_Proc): Likewise.
	(Init_Formals): Likewise.
	* bindgen.adb (Gen_Adainit): Declare Partition_Elaboration_Policy
	and set it in generated code if the elaboration policy is
	sequential. The procedure called to activate all tasks is now
	named __gnat_activate_all_tasks.
	* rtsfind.adb (RE_Activate_Restricted_Task,
	RE_Create_Restricted_Task_Sequential): New RE_Id literals.
	* s-tarest.adb (Create_Restricted_Task): Added to create a task without
	adding it on an activation chain.
	(Activate_Tasks): Has now a Chain parameter.
	(Activate_All_Tasks_Sequential): Added. Called by the binder to
	activate all tasks.
	(Activate_Restricted_Tasks): Added. Called during elaboration to
	activate tasks of the units.
	* s-tarest.ads: Remove pragma Partition_Elaboration_Policy.
	(Partition_Elaboration_Policy): New variable (set by the binder).
	(Create_Restricted_Task): Revert removal of the chain parameter.
	(Create_Restricted_Task_Sequential): New procedure.
	(Activate_Restricted_Tasks): Revert removal.
	(Activate_All_Tasks_Sequential): New procedure.

From-SVN: r193214

	* adaint.c Add file macro definitions missing on Android.
	* adaint.h Avoid definitions related to task affinity and CPU
	sets since this functionality is missing on the Android
	* errno.c (__set_errno): Android already contains such a named
	procedure so do include again.
	* gsocket.h: Sockets not supported on Android.
	* init.c: Avoid linux related code not supported on Android.
	* sysdep.c (sigismember, sigaddset, sigdelset, sigemptyset,
	sigfillset): wrapper functions since sig routines are defined
	as inline macros on Android.
	* terminals.c: Add stubs for terminal related functions not
	supported on Android.

From-SVN: r193213

sem_prag.adb (Analyze_Pragma): Do not output the characters of an illegal argument as it may not have...

2012-11-06  Hristian Kirtchev  <kirtchev@adacore.com>

	* sem_prag.adb (Analyze_Pragma): Do not
	output the characters of an illegal argument as it may not have
	characters to begin with.

2012-11-06  Hristian Kirtchev  <kirtchev@adacore.com>

	* exp_prag.adb (Expand_Pragma_Loop_Assertion):
	Change the order of argument processing to avoid disappearing
	increase / decrease expressions.

From-SVN: r193212

2012-11-06  Hristian Kirtchev  <kirtchev@adacore.com>

	* exp_prag.adb: Add with and use clause for Sem_Ch8.
	(Expand_N_Pragma): Add a new variant to expand pragma Loop_Assertion.
	(Expand_Pragma_Loop_Assertion): New routine.
	* par-prag.adb (Prag): The semantic analysis of pragma
	Loop_Assertion is carried out by Analyze_Pragma. No need for
	checks in the parser.
	* sem_prag.adb: Add a reference position value for pragma
	Loop_Assertion in Sig_Flags.
	(Analyze_Pragma): Add semantic analysis for pragma Loop_Assertion.
	* snames.ads-tmpl: Add the following new names:
	Name_Decreases Name_Increases Name_Loop_Assertion.
	Add new pragma id Pragma_Loop_Assertion.

2012-11-06  Ed Schonberg  <schonberg@adacore.com>

	* exp_ch5.adb: Identifier in iterator must have debug
	information.

From-SVN: r193211

	PR target/41993
	* mode-switching.c (create_pre_exit): Set return_copy to
	last_insn when copy_start is a pseudo reg.


Co-Authored-By: Kaz Kojima <kkojima@gcc.gnu.org>

From-SVN: r193210

libada/
	* Makefile.in (osconstool): Fix target.
ada/
	* gcc-interface/Makefile.in, gcc-interface/Make-lang.in: Remove
	duplicate rules handled by Make-generated.in.

From-SVN: r193209

	* config/i386/i386.c (bdesc_args): Rename CODE_FOR_avx2_umulhrswv16hi3 to
	CODE_FOR_avx2_pmulhrswv16hi3.
	* config/i386/predicates.md (const1_operand): Extend for vectors.
	* config/i386/sse.md (ssse3_avx2): Extend.
	(ssedoublemode): Ditto.
	(<sse2_avx2>_uavg<mode>3): Merge avx2_uavgv32qi3, sse2_uavgv16qi3,
	avx2_uavgv16hi3 and sse2_uavgv8hi3 into one.
	(*<sse2_avx2>_uavg<mode>3): Merge *avx2_uavgv32qi3, *sse2_uavgv16qi3,
	*avx2_uavgv16hi3 and *sse2_uavgv8hi3 into one.
	(PMULHRSW): New.
	(<ssse3_avx2>_pmulhrsw<mode>3): Merge avx2_umulhrswv16hi3,
	ssse3_pmulhrswv8hi3 and ssse3_pmulhrswv4hi3 into one.
	(*avx2_pmulhrswv16hi3): Replace const_vector with const1_operand
	predicate.
	(*ssse3_pmulhrswv8hi3): Ditto.
	(*ssse3_pmulhrswv4hi3): Ditto.

From-SVN: r193208

From-SVN: r193207

From-SVN: r193206

        * config/epiphany/epiphany.c (epiphany_address_cost):
        Use MODE parameter.

From-SVN: r193205

========================

Sriraman Tallam, tmsriram@google.com

Overview of the patch which adds support to specify function versions.  This is
only enabled for target i386.

Example:

int foo ();  /* Default version */
int foo () __attribute__ ((target("avx,popcnt")));/*Specialized for avx and popcnt */
int foo () __attribute__ ((target("arch=core2,ssse3")));/*Specialized for core2 and ssse3*/

int main ()
{
 int (*p)() = &foo;
 return foo () + (*p)();
}

int foo ()
{
 return 0;
}

int __attribute__ ((target("avx,popcnt")))
foo ()
{
 return 0;
}

int __attribute__ ((target("arch=core2,ssse3")))
foo ()
{
 return 0;
}

The above example has foo defined 3 times, but all 3 definitions of foo are
different versions of the same function. The call to foo in main, directly and
via a pointer, are calls to the multi-versioned function foo which is dispatched
to the right foo at run-time.

Front-end changes:

The front-end changes are calls at appropriate places to target hooks that
determine the following:

* Determine if two function decls with the same signature are versions.
* Determine the assembler name of a function version.
* Generate the dispatcher function for a set of function versions.
* Compare versions to see if one has a higher priority over the other.

All the implementation happens in the target-specific config/i386/i386.c.

What does the patch do?

* Tracking decls that correspond to function versions of function
name, say "foo":

When the front-end sees more than one decl for "foo", it calls a target hook to
determine if they are versions. To prevent duplicate definition errors with
other versions of "foo", "decls_match" function in cp/decl.c is made to return
false when 2 decls have are deemed versions by the target. This will make all
function versions of "foo" to be added to the overload list of "foo".

* Change the assembler names of the function versions.

For i386, the target changes the assembler names of the function versions by
 suffixing the sorted list of args to "target" to the function name of "foo".
For example, the assembler name of
 "void foo () __attribute__ ((target ("sse4")))" will
become _Z3foov.sse4.  The target hook mangle_decl_assembler_name is used
for this.

* Overload resolution:

 Function "build_over_call" in cp/call.c sees a call to function
"foo", which is multi-versioned. The overload resolution happens in
function "joust" in "cp/call.c". Here, the call to "foo" has all
possible versions of "foo" as candidates. All the candidates of "foo" are
stored in the cgraph side data structure. Each version of foo is chained in a 
doubly-linked list with the default function as the first element.  This allows
any pass to access all the semantically identical versions. A call to a
multi-versioned function will be replaced by a call to a dispatcher function,
determined by a target hook, to execute the right function version at run-time.

Optimization to directly call a version when possible:
Also, in joust, where overload resolution happens, a multiversioned function
resolution is made to return the most specialized version.  This is the version
that will be checked for dispatching first and is determined by the target.
Now, if the caller can inline this function version then a direct call is made
to this function version rather than go through the dispatcher. When a direct
call cannot be made, a call to the dispatcher function is created.

* Creating the dispatcher body.

The dispatcher body, called the resolver is made only when there is a call to a
multiversioned function dispatcher or the address of a function is taken. This
is generated during cgraph_analyze_function. This is done by another target hook.

* Dispatch ordering.

The order in which the function versions are checked during dispatch is based
on a priority value assigned for the ISA that is catered. More specialized 
versions are checked for dispatching first.  This is to mitigate the ambiguity
that can arise when more than one function version is valid for execution on
a particular platform.  This is not a perfect solution, and in future the user
should be allowed to assign a dispatching priority value to each version.

Function MV in the Intel compiler:

The intel compiler supports function multiversioning and the syntax is
similar to the patch proposed here.  Here is an example of how to
generate multiple function versions with the intel compiler.

/* Create a stub function to specify the various versions of function that
   will be created, using declspec attribute cpu_dispatch.  */
__declspec (cpu_dispatch (core_i7_sse4_2, atom, generic))
void foo () {};

/* Bodies of each function version.  */

/* Intel Corei7 processor + SSE4.2 version.  */
__declspec (cpu_specific(core_i7_sse4_2))
void foo ()
{
  printf ("corei7 + sse4.2");
}

/* Atom processor.  */
__declspec (cpu_specific(atom))
void foo ()
{
  printf ("atom");
}

/* The generic or the default version.  */
__declspec (cpu_specific(generic))
void foo ()
{
  printf ("This is generic");
}

A new function version is generated by defining a new function with the same
signature but with a different cpu_specific declspec attribute string.  The
set of cpu_specific strings that are allowed is the following:

"core_2nd_gen_avx"
"core_aes_pclmulqdq"
"core_i7_sse4_2"
"core_2_duo_sse4_1"
"core_2_duo_ssse3"
"atom"
"pentium_4_sse3"
"pentium_4"
"pentium_m"
"pentium_iii"
"generic"

Comparison with the GCC MV implementation in this patch:

* Version creation syntax:

The implementation in this patch also has a similar syntax to specify function
versions. The first stub function is not needed.  Here is the code to generate
the function versions with this patch:

/* Intel Corei7 processor + SSE4.2 version.  */
__attribute__ ((target ("arch=corei7, sse4.2")))
void foo ()
{
  printf ("corei7 + sse4.2");
}

/* Atom processor.  */
__attribute__ ((target ("arch=atom")))
void foo ()
{
  printf ("atom");
}

void foo ()
{
}

The target attribute can have one of the following arch names:

"amd"
"intel"
"atom"
"core2"
"corei7"
"nehalem"
"westmere"
"sandybridge"
"amdfam10h"
"barcelona"
"shanghai"
"istanbul"
"amdfam15h"
"bdver1"
"bdver2"

and any number of the following ISA names:

"cmov"
"mmx"
"popcnt"
"sse"
"sse2"
"sse3"
"ssse3"
"sse4.1"
"sse4.2"
"avx"
"avx2"



	* doc/tm.texi.in (TARGET_OPTION_FUNCTION_VERSIONS): New hook
	description.
	* (TARGET_COMPARE_VERSION_PRIORITY): New hook description.
	* (TARGET_GET_FUNCTION_VERSIONS_DISPATCHER): New hook description.
	* (TARGET_GENERATE_VERSION_DISPATCHER_BODY): New hook description.
	* doc/tm.texi: Regenerate.
	* target.def (compare_version_priority): New target hook.
	* (generate_version_dispatcher_body): New target hook.
	* (get_function_versions_dispatcher): New target hook.
	* (function_versions): New target hook.
	* cgraph.c (cgraph_fnver_htab): New htab.
	(cgraph_fn_ver_htab_hash): New function.
	(cgraph_fn_ver_htab_eq): New function.
	(version_info_node): New pointer.
	(insert_new_cgraph_node_version): New function.
	(get_cgraph_node_version): New function.
	(delete_function_version): New function.
	(record_function_versions): New function.
	* cgraph.h (cgraph_node): New bitfield dispatcher_function.
	(cgraph_function_version_info): New struct.
	(get_cgraph_node_version): New function.
	(insert_new_cgraph_node_version): New function.
	(record_function_versions): New function.
	(delete_function_version): New function.
	(init_lowered_empty_function): Expose function.
	* tree.h (DECL_FUNCTION_VERSIONED): New macro.
	(tree_function_decl): New bit-field versioned_function.
	* cgraphunit.c (cgraph_analyze_function): Generate body of multiversion
	function dispatcher.
	(cgraph_analyze_functions): Analyze dispatcher function.
	(init_lowered_empty_function): Make non-static. New parameter in_ssa.
	(assemble_thunk): Add parameter to call to init_lowered_empty_function.
	* config/i386/i386.c (add_condition_to_bb): New function.
	(get_builtin_code_for_version): New function.
	(ix86_compare_version_priority): New function.
	(feature_compare): New function.
	(dispatch_function_versions): New function.
	(ix86_function_versions): New function.
	(attr_strcmp): New function.
	(ix86_mangle_function_version_assembler_name): New function.
	(ix86_mangle_decl_assembler_name): New function.
	(make_name): New function.
	(make_dispatcher_decl): New function.
	(is_function_default_version): New function.
	(ix86_get_function_versions_dispatcher): New function.
	(make_attribute): New function.
	(make_resolver_func): New function.
	(ix86_generate_version_dispatcher_body): New function.
	(fold_builtin_cpu): Return integer for cpu builtins.
	(TARGET_MANGLE_DECL_ASSEMBLER_NAME): New macro.
	(TARGET_COMPARE_VERSION_PRIORITY): New macro.
	(TARGET_GENERATE_VERSION_DISPATCHER_BODY): New macro.
	(TARGET_GET_FUNCTION_VERSIONS_DISPATCHER): New macro.
	(TARGET_OPTION_FUNCTION_VERSIONS): New macro.

	* class.c (add_method): Change assembler names of function versions.
	(mark_versions_used): New static function.
	(resolve_address_of_overloaded_function): Create dispatcher decl and
	return address of dispatcher instead.
	* decl.c (decls_match): Make decls unmatched for versioned
	functions.
	(duplicate_decls): Remove ambiguity for versioned functions.
	Delete versioned function data for merged decls. 
	* decl2.c (check_classfn): Check attributes of versioned functions
	for match.
	* call.c (get_function_version_dispatcher): New function.
	(mark_versions_used): New static function.
	(build_over_call): Make calls to multiversioned functions
	to call the dispatcher.
	(joust): For calls to multi-versioned functions, make the most
	specialized function version win.

	* testsuite/g++.dg/mv1.C: New test.
	* testsuite/g++.dg/mv2.C: New test.
	* testsuite/g++.dg/mv3.C: New test.
	* testsuite/g++.dg/mv4.C: New test.
	* testsuite/g++.dg/mv5.C: New test.
	* testsuite/g++.dg/mv6.C: New test.

From-SVN: r193204

From-SVN: r193203