re PR testsuite/83289 (i386/sse2-init-v2di-2.c, i386/avx256-unaligned-load-1.c, i386/avx256-unaligned-store-*.c fails)

	PR testsuite/83289
	* gcc.target/i386/avx256-unaligned-load-1.c: Adjust for -dp
	alternative numbers being 0 based instead of former 1 based.
	* gcc.target/i386/avx256-unaligned-store-1.c: Likewise.
	* gcc.target/i386/avx256-unaligned-store-2.c: Likewise.
	* gcc.target/i386/avx256-unaligned-store-3.c: Likewise.
	* gcc.target/i386/avx256-unaligned-store-4.c: Likewise.
	* gcc.target/i386/sse2-init-v2di-2.c: Likewise.

From-SVN: r255427

tree-ssa-dce.c (simple_dce_from_worklist): Move and rename from tree-ssa-pre.c::remove_dead_inserted_code.

	* tree-ssa-dce.c (simple_dce_from_worklist): Move and rename from
	tree-ssa-pre.c::remove_dead_inserted_code.
	* tree-ssa-dce.h: New file.
	* tree-ssa-pre.c (tree-ssa-dce.h): Include new header file.
	(remove_dead_inserted_code): Move and rename to function
	tree-ssa-dce.c::simple_dce_from_worklist.
	(pass_pre::execute): Update use.

From-SVN: r255426

2017-12-05  Jason Merrill  <jason@redhat.com>
	    Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/fs_fwd.h (copy, copy_file): Remove noexcept.
	(permissions): Add noexcept.
	* include/bits/fs_ops.h (permissions): Add noexcept.
	* libsupc++/eh_throw.cc (__cxa_init_primary_exception): Add
	_GLIBCXX_NOTHROW.

Co-Authored-By: Jonathan Wakely <jwakely@redhat.com>

From-SVN: r255425

2017-12-05  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/83277
	* graphite-isl-ast-to-gimple.c (should_copy_to_new_region): Make sure
	to code-gen liveout vars.

	* gcc.dg/graphite/pr83277.c: New testcase.

From-SVN: r255424

The split conditions for aarch64_simd_bsldi_internal and
aarch64_simd_bsldi_alt were:

  "&& GP_REGNUM_P (REGNO (operands[0]))"

But since they (deliberately) can be split before reload, the operand
matched by register_operand can be a SUBREG rather than a REG.  This
triggered a boostrap failure building libgcc with rtl checking enabled.

While checking other define_insn_and_splits for the same thing,
I noticed a couple of SIMD ones were missing the leading "&&",
meaning that they would trigger even without TARGET_SIMD.  That
shouldn't matter in practice, since combine should never end up
generating matching rtl, but...

2017-12-05  Richard Sandiford  <richard.sandiford@linaro.org>

gcc/
	* config/aarch64/aarch64-simd.md (aarch64_simd_bsldi_internal)
	(aarch64_simd_bsldi_alt): Check REG_P before GP_REGNUM_P.
	(aarch64_cm<optab>di, aarch64_cmtstdi): Add leading "&&" to
	split condition.

From-SVN: r255423

gcc/
2017-12-05  Max Filippov  <jcmvbkbc@gmail.com>

	* config/xtensa/xtensa.c (xtensa_asan_shadow_offset): New
	function.
	(TARGET_ASAN_SHADOW_OFFSET): New macro definition.
	* config/xtensa/xtensa.h (FRAME_GROWS_DOWNWARD): Set to 1 if
	ASAN is enabled.

From-SVN: r255420

re PR testsuite/83281 (libgomp.oacc-c-c++-common/reduction-cplx-flt.c and reduction-cplx-dbl.c fail starting with r255335)

	PR testsuite/83281
	* testsuite/libgomp.oacc-c-c++-common/reduction-cplx-flt.c (main): Use
	j suffix instead of i.
	* testsuite/libgomp.oacc-c-c++-common/reduction-cplx-dbl.c (main):
	Likewise.

From-SVN: r255418

re PR tree-optimization/83283 (Casting from boolean to unsigned char to enum returns incorrect results)

	PR tree-optimization/83283
	* g++.dg/torture/pr83283.C: New test.

From-SVN: r255417

2017-12-05  Richard Biener   <rguenther@suse.de>

	* timevar.def (TV_TREE_RECIP, TV_TREE_SINCOS, TV_TREE_WIDEN_MUL):
	Add.
	* tree-ssa-math-opts.c (pass_data_cse_reciprocal): Use TV_TREE_RECIP.
	(pass_data_cse_sincos): Use TV_TREE_SINCOS.
	(pass_data_optimize_widening_mul): Use TV_TREE_WIDEN_MUL.

From-SVN: r255415

gcc/ada/

2017-12-05  Piotr Trojanek  <trojanek@adacore.com>

	* sem_util.adb (Contains_Refined_State): Remove.

2017-12-05  Ed Schonberg  <schonberg@adacore.com>

	* sem_ch13.adb (Analyze_Aspect_Specifications, case Predicate): A
	predicate cannot apply to a formal type.

2017-12-05  Arnaud Charlet  <charlet@adacore.com>

	* exp_unst.ads: Fix typos.

2017-12-05  Jerome Lambourg  <lambourg@adacore.com>

	* libgnarl/s-taprop__qnx.adb: Better detect priority ceiling bug in
	QNX.  At startup, the first mutex created has a non-zero ceiling
	priority whatever its actual policy. This makes some tests fail
	(c940013 for example).

2017-12-05  Bob Duff  <duff@adacore.com>

	* exp_ch11.adb (Expand_N_Handled_Sequence_Of_Statements): Call
	Expand_Cleanup_Actions for N_Extended_Return_Statement.
	* exp_ch7.adb (Expand_Cleanup_Actions): Handle
	N_Extended_Return_Statement by transforming the statements into a
	block, and (indirectly) calling Expand_Cleanup_Actions on the block.
	It's too hard for Expand_Cleanup_Actions to operate directly on the
	N_Extended_Return_Statement, because it has a different structure than
	the other node kinds that Expand_Cleanup_Actions.
	* exp_util.adb (Requires_Cleanup_Actions): Add support for
	N_Extended_Return_Statement.  Change "when others => return False;" to
	"when others => raise ...;" so it's clear what nodes this function
	handles.  Use named notation where appropriate.
	* exp_util.ads: Mark incorrect comment with ???.

2017-12-05  Javier Miranda  <miranda@adacore.com>

	* exp_ch9.adb (Install_Private_Data_Declarations): Add missing
	Debug_Info_Needed decoration of internally generated discriminal
	renaming declaration.

2017-12-05  Arnaud Charlet  <charlet@adacore.com>

	* exp_unst.adb (Unnest_Subprogram): Add handling of 'Access on
	nested subprograms.

2017-12-05  Sergey Rybin  <rybin@adacore.com>

	* doc/gnat_ugn/gnat_utility_programs.rst: Add description of '--ignore'
	option for gnatmetric, gnatpp, gnat2xml, and gnattest.

2017-12-05  Piotr Trojanek  <trojanek@adacore.com>

	* sem_util.adb (Contains_Refined_State): Remove.

2017-12-05  Piotr Trojanek  <trojanek@adacore.com>

	* rtsfind.ads: Add new enumeration literals: RE_Clock_Time (for
	Ada.Real_Time.Clock_Time) and RO_CA_Clock_Time (for
	Ada.Calendar.Clock_Time).

2017-12-05  Ed Schonberg  <schonberg@adacore.com>

	* sem_ch4.adb (Is_Private_Overriding): If the candidate private
	subprogram is overloaded, scan the list of homonyms in the same
	scope, to find the inherited operation that may be overridden
	by the candidate.
	* exp_ch11.adb, exp_ch7.adb: Minor reformatting.

2017-12-05  Bob Duff  <duff@adacore.com>

	* exp_ch6.adb (Expand_N_Extended_Return_Statement): If the
	Init_Assignment is rewritten, we need to set Assignment_OK on the new
	node.  Otherwise, we will get spurious errors when initializing via
	assignment statement.

gcc/testsuite/

2017-12-05  Ed Schonberg  <schonberg@adacore.com>

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

From-SVN: r255414

2017-12-05  Hristian Kirtchev  <kirtchev@adacore.com>

	* sem_elab.adb: Update the terminology and switch sections.
	(Check_SPARK_Model_In_Effect): New routine.
	(Check_SPARK_Scenario): Verify the model in effect for SPARK.
	(Process_Conditional_ABE_Call_SPARK): Verify the model in effect for
	SPARK.
	(Process_Conditional_ABE_Instantiation_SPARK): Verify the model in
	effect for SPARK.
	(Process_Conditional_ABE_Variable_Assignment_SPARK): Verify the model
	in effect for SPARK.

2017-12-05  Nicolas Setton  <setton@adacore.com>

	* terminals.c (__gnat_setup_child_communication): As documented,
	__gnat_setup_child_communication should not terminate - it is intended
	to be used as the child process of a call to fork().  However, execvp
	might actually return in some cases, for instance when attempting to
	run a 32-bit binary on a 64-bit Linux distribution when the
	compatibility packages are not installed. In these cases, exit the
	program to conform to the documentation.

2017-12-05  Olivier Hainque  <hainque@adacore.com>

	* libgnat/s-tsmona.adb: Fix for oversight in the tsmona interface
	update.

2017-12-05  Gary Dismukes  <dismukes@adacore.com>

	* doc/gnat_ugn/elaboration_order_handling_in_gnat.rst: Minor typo fix
	and reformatting.
	* gnat_ugn.texi: Regenerate.

2017-12-05  Olivier Hainque  <hainque@adacore.com>

	* sem_util.adb (Set_Convention): Always clear Can_Use_Internal_Rep
	on access to subprogram types with foreign convention.

2017-12-05  Yannick Moy  <moy@adacore.com>

	* doc/gnat_ugn/building_executable_programs_with_gnat.rst: Fix User's
	Guide description of default settings of warnings.

From-SVN: r255413

2017-12-05  Olivier Hainque  <hainque@adacore.com>

	* s-dwalin.adb (Read_And_Execute_Isn): Adjust test checking for the end
	of section. Add comments explaining the rationale of the computation.

2017-12-05  Bob Duff  <duff@adacore.com>

	* exp_ch11.adb: Minor refactoring.

2017-12-05  Hristian Kirtchev  <kirtchev@adacore.com>

	* debug.adb: Add debug switches d_a, d_e, and d_p, along with
	documentation.
	(Set_Underscored_Debug_Flag): New routine.
	* debug.ads: Add the flags for all underscore switches.
	(Set_Underscored_Debug_Flag): New routine.
	* einfo.adb: Flag303 is now Suppress_Elaboration_Warnings.
	(Suppress_Elaboration_Warnings): New routine.
	(Set_Suppress_Elaboration_Warnings): New routine.
	(Write_Entity_Flags): Add output for Suppress_Elaboration_Warnings.
	* einfo.ads: Add new flag Suppress_Elaboration_Warnings.
	(Suppress_Elaboration_Warnings): New routine along with pragma Inline.
	(Set_Suppress_Elaboration_Warnings): New routine along with pragma
	Inline.
	* exp_ch3.adb (Build_Init_Procedure): Restore the behavior of the
	legacy elaboration model.
	(Default_Initialize_Object): Restore the behavior of the legacy
	elaboration model.
	* exp_ch9.adb: Add with and use clause for Sem_Elab.
	(Build_Task_Activation_Call): Restore the behavior of the legacy
	elaboration model.
	* frontend.adb (Frontend): Restore the behavior of the legacy
	elaboration model.
	* opt.ads: Add new flags Legacy_Elaboration_Checks and
	Relaxed_Elaboration_Checks, along with documentation.
	* sem_attr.adb (Analyze_Access_Attribute): Restore the behavior of the
	legacy elaboration model.
	* sem_ch5.adb (Analyze_Assignment): Restore the behavior of the legacy
	elaboration model.
	* sem_ch7.adb (Analyze_Package_Declaration): Restore the behavior of
	the legacy elaboration model.
	* sem_ch8.adb (Attribute_Renaming): Restore the behavior of the legacy
	elaboration model.
	* sem_ch12.adb (Analyze_Instance_And_Renamings): Restore the behavior
	of the legacy elaboration model.
	(Analyze_Package_Instantiation): Restore the behavior of the legacy
	elaboration model.
	(Analyze_Subprogram_Instantiation): Restore the behavior of the legacy
	elaboration model.
	* sem_elab.adb: Update the documentation of the Processing phase.
	Update the documentation on elaboration-related compilation
	switches.  Update the documentation on adding a new target.  Add
	Processing_Attributes which represent the state of the Processing
	phase.  Resurrect the previous elaboration model as "legacy elaboration
	model".
	(Build_Call_Marker): This routine does not function when the legacy
	elaboration model is in effect. Do not consider entry calls and requeue
	statements when debug flag d_e is in effect. Do not consider calls to
	subprograms which verify the runtime semantics of certain assertion
	pragmas when debug flag d_p is in effect.
	(Build_Variable_Reference_Marker): This routine does not function when
	the legacy elaboration model is in effect.
	(Check_Elaboration_Scenarios): This routine does not function when the
	legacy elaboration model is in effect.
	(Ensure_Prior_Elaboration): The various flags have now been replaced
	with a state. Do not generate implicit Elaborate[_All] pragmas when
	their creation has been suppressed.
	(Ensure_Prior_Elaboration_Static): The with clause is marked based on
	the requested pragma, not on the nature of the scenario.
	(In_External_Context): Removed.
	(Is_Assertion_Pragma_Target): New routine.
	(Is_Potential_Scenario): Stop the traversal of a task body when
	reaching an accept or select statement, and debug switch d_a is in
	effect.
	(Kill_Elaboration_Scenario): This routine does not function when the
	legacy elaboration model is in effect.
	(Process_Activation_Generic): The various flags have now been replaced
	with a state.
	(Process_Conditional_ABE): The various flags have now been replaced
	with a state.
	(Process_Conditional_ABE_Access): The various flags have now been
	replaced with a state.
	(Process_Conditional_ABE_Activation_Impl): The various flags have now
	been replaced with a state. Do not process an activation call which
	activates a task whose type is defined in an external instance, and
	debug switch dL is in effect. Suppress the generation of implicit
	Elaborate[_All] pragmas once a conditional ABE check has been
	installed.
	(Process_Conditional_ABE_Call): The various flags have now been
	replaced with a state. Do not process a call which invokes a subprogram
	defined in an external instance, and debug switch dL is in effect.
	(Process_Conditional_ABE_Call_Ada): The various flags have now been
	replaced with a state. Suppress the generation of implicit
	Elaborate[_All] pragmas once a conditional ABE check has been
	installed.
	(Process_Conditional_ABE_Call_SPARK): The various flags have now been
	replaced with a state.
	(Process_Conditional_ABE_Instantiation): The various flags have now
	been replaced with a state.
	(Process_Conditional_ABE_Instantiation_Ada): The various flags have now
	been replaced with a state. Suppress the generation of implicit
	Elaborate[_All] pragmas once a conditional ABE check has been
	installed.
	(Process_Conditional_ABE_Instantiation_SPARK): The various flags have
	now been replaced with a state.
	(Process_Guaranteed_ABE_Activation_Impl): The various flags have now
	been replaced with a state.
	(Process_Single_Activation): The various flags have now been replaced
	with a state.
	(Record_Elaboration_Scenario): This routine does not function when the
	legacy elaboration model is in effect.
	(Traverse_Body): The various flags have now been replaced with a state.
	* sem_elab.ads: Resurrect the pre-18.x elaboration model as "legacy
	elaboration model".
	* sem_prag.adb (Analyze_Pragma): Restore the behavior of the legacy
	elaboration model.
	* sem_res.adb (Resolve_Call): Restore the behavior of the legacy
	elaboration model.
	(Resolve_Entity_Name): Restore the behavior of the legacy elaboration
	model.
	* sem_util.adb (Mark_Elaboration_Attributes): This routine does not
	function when the legacy elaboration model is in effect.
	* sinfo.adb (Is_Known_Guaranteed_ABE): Update the assertion check.
	(No_Elaboration_Check): New routine.
	(Set_Is_Known_Guaranteed_ABE): Update the assertion check.
	(Set_No_Elaboration_Check): New routine.
	* sinfo.ads: Update the documentation of flag Is_Known_Guaranteed_ABE
	along with occurrences in nodes.  Add new flag No_Elaboration_Check
	along with occurrences in nodes.
	* switch-c.adb (Scan_Front_End_Switches): Add processing for debug
	switches with underscores.  Add processing for switches -gnatH and
	-gnatJ.
	* usage.adb (Usage): Add output for switches -gnatH and -gnatJ.
	* doc/gnat_ugn/elaboration_order_handling_in_gnat.rst: Update the
	documentation to include the legacy and relaxed elaboration models.
	* gnat_ugn.texi: Regenerate.

2017-12-05  Arnaud Charlet  <charlet@adacore.com>

	* doc/gnat_ugn/platform_specific_information.rst: Minor edit.
	Improve doc on required packages for linux 32bits.

2017-12-05  Doug Rupp  <rupp@adacore.com>

	* tracebak.c (ppc64-vx7): USE_GCC_UNWINDER for 64bit.

2017-12-05  Javier Miranda  <miranda@adacore.com>

	* checks.adb (Generate_Range_Check): Force evaluation of the node in
	more cases.  This patch was written to improve the code generated by
	the CCG compiler but it is enabled for all targets since double
	evaluation is always a potential source of inefficiency.

2017-12-05  Gary Dismukes  <dismukes@adacore.com>

	* doc/gnat_ugn/gnat_utility_programs.rst: Remove reference to obsolete
	-fdump-xref switch.

From-SVN: r255412

2017-12-05  Eric Botcazou  <ebotcazou@adacore.com>

	* exp_ch5.adb (Expand_Iterator_Loop_Over_Array): Use the SLOC of the
	iteration scheme throughout, except for the new loop statement(s).

2017-12-05  Ed Schonberg  <schonberg@adacore.com>

	* exp_aggr.adb (Gen_Assign): Do not analyze the expressionn of the
	assignment if it is part of an Iterated_Component_Association: the
	analysis needs to take place once the loop structure is analyzed and
	the loop parameter made visible, because references to it typically
	appear in the corresponding expression.  This is necessary if the
	expression is an aggregate, because previous pre-analysis of the
	expression does not handle nested aggregates properly.

2017-12-05  Bob Duff  <duff@adacore.com>

	* sem_res.adb (Resolve_Allocator): Avoid coextension processing for an
	allocator that is the expansion of a build-in-place function call.

2017-12-05  Olivier Hainque  <hainque@adacore.com>

libgnat/
	* s-trasym__dwarf.adb (spec of Module_Name.Get): Instead of
	possibly adjusting the lookup address by a load address, expect
	a extra argument through which the load address can be conveyed
	separately.
	(Multi_Module_Symbolic_Traceback): Adjust accordingly. Pass the
	retrieved load address to Init_Module.
	* s-tsmona__linux.adb (Get): Honor the new interface.
	* s-tsmona__mingw.adb (Get): Likewise.
	* s-dwalin.ads: Adjust comments to be explicit about which
	addresses are from module info and which are run-time addresses,
	offsetted by the module load address.
	* s-dwalin.adb (Set_Load_Address): Simply set C.Load_Slide.
	Do not alter the module Low and High (relative) addresses.
	(Is_Inside): Improve documentation regarding the kinds of addresses
	at hand and correct the test.
	(Symbolic_Traceback): Use separate variables with explicit names
	for the address in traceback (run-time value) and the address to
	lookup within the shared object (module-relative). Adjust the
	computation of address passed to Symbolic_Address for symbolization.

From-SVN: r255411

2017-12-05  Arnaud Charlet  <charlet@adacore.com>

	* opt.ads (Expand_Nonbinary_Modular_Ops): New flag.
	* exp_ch4.adb (Expand_Nonbinary_Modular_Op): Use
	Expand_Nonbinary_Modular_Ops instead of Modify_Tree_For_C, so that
	other back-ends can also benefit from the front-end expansion. Remove
	test for Modify_Tree_For_C in all callers to better share code.
	* gnat1drv.adb (Adjust_Global_Switches): Set
	Expand_Nonbinary_Modular_Ops when generating C code.

2017-12-05  Ed Schonberg  <schonberg@adacore.com>

	* exp_ch5.adb (Expand_Formal_Container_Loop): Ensure that the loop
	parameter becomes invisible after analyzing the loop, which has been
	rewritten as a while-loop.

2017-12-05  Doug Rupp  <rupp@adacore.com>

	* vxaddr2line.adb: Revise and enhance for new ports, remove dead ports,
	and update for 64bit ports.

From-SVN: r255410

2017-12-05  Bob Duff  <duff@adacore.com>

	* exp_ch6.adb (Build_In_Place_Formal): Search for the formal by suffix
	instead of the full name.
	* sem_ch6.adb (Create_Extra_Formals): Make sure there are extra formals
	in the case of an instance of a generic.

2017-12-05  Arnaud Charlet  <charlet@adacore.com>

	(Adjust_Global_Switches): Create an alias GNAT_Annotate to map to
	pragma Annotate.

From-SVN: r255409

Without this definition I got the following error:

<...>/xgcc <...>  -c -g -O2   -W -Wall -gnatpg -nostdinc  -g -fno-inline \
      -fno-toplevel-reorder -O1  a-except.adb -o a-except.o
a-exexpr.adb:38:06: "System.Exceptions.Machine" is not a predefined library unit
a-exexpr.adb:38:06: "Ada.Exceptions (body)" depends on "Ada.Exceptions.Exception_Propagation (body)"
a-exexpr.adb:38:06: "Ada.Exceptions.Exception_Propagation (body)" depends on "System.Exceptions.Machine (spec)"
../gcc-interface/Makefile:2661: recipe for target 'a-except.o' failed

gcc/ada

	* gcc-interface/Makefile.in (RTEMS): Define EH_MECHANISM.

From-SVN: r255408

	* dbxout.c (dbxout_block): Grow buf to 30 bytes.

From-SVN: r255406

gcc/
	* doc/invoke.texi: Document the options.
	* flag-types.h (enum sanitize_code): Add
	SANITIZE_POINTER_COMPARE and SANITIZE_POINTER_SUBTRACT.
	* ipa-inline.c (sanitize_attrs_match_for_inline_p): Add handling
	of SANITIZE_POINTER_COMPARE and SANITIZE_POINTER_SUBTRACT.
	* opts.c: Define new sanitizer options.
	* sanitizer.def (BUILT_IN_ASAN_POINTER_COMPARE): Likewise.
	(BUILT_IN_ASAN_POINTER_SUBTRACT): Likewise.
gcc/c/
	* c-typeck.c (pointer_diff): Add new argument and instrument
	pointer subtraction.
	(build_binary_op): Similar for pointer comparison.
gcc/cp/
	* typeck.c (pointer_diff): Add new argument and instrument
	pointer subtraction.
	(cp_build_binary_op): Create compound expression if doing an
	instrumentation.
gcc/testsuite/
	* c-c++-common/asan/pointer-compare-1.c: New test.
	* c-c++-common/asan/pointer-compare-2.c: New test.
	* c-c++-common/asan/pointer-subtract-1.c: New test.
	* c-c++-common/asan/pointer-subtract-2.c: New test.
	* c-c++-common/asan/pointer-subtract-3.c: New test.
	* c-c++-common/asan/pointer-subtract-4.c: New test.
libsanitizer/
	* asan/asan_descriptions.cc: Cherry-pick upstream r319668.
	* asan/asan_descriptions.h: Likewise.
	* asan/asan_report.cc: Likewise.
	* asan/asan_thread.cc: Likewise.
	* asan/asan_thread.h: Likewise.

Co-Authored-By: Jakub Jelinek <jakub@redhat.com>

From-SVN: r255404

cp-gimplify.c (cp_maybe_instrument_return): Don't add __builtin_unreachable if -O0 or if -fsanitize=unreachable.

	* cp-gimplify.c (cp_maybe_instrument_return): Don't add
	__builtin_unreachable if -O0 or if -fsanitize=unreachable.

	* g++.dg/missing-return.C: Add -O to dg-options.

From-SVN: r255403

gcc/
	* common/config/i386/i386-common.c (OPTION_MASK_ISA_AVX512VNNI_SET,
	OPTION_MASK_ISA_AVX512VNNI_UNSET): New.
	(ix86_handle_option): Handle -mavx512vnni.
	* config/i386/cpuid.h (bit_AVX512VNNI): New bit.
	* config/i386/driver-i386.c (host_detect_local_cpu): Handle new bit.
	* config/i386/i386-c (__AVX512VNNI__): New.
	* config/i386/i386.c (ix86_target_string): Handle new option.
	(ix86_valid_target_attribute_inner_p): Handle new option.
	* config/i386/i386.h (TARGET_AVX512VNNI, TARGET_AVX512VNNI_P): New.
	* config/i386/i386.opt (mavx512vnni): New option.

From-SVN: r255401

    
    Add the "no nil check needed" annotation to the dereference operations
    created in Parse::enclosing_var_reference (this is safe since the
    closure object is under control of the compiler, and pointer fields in
    it will always be non-nil).
    
    Reviewed-on: https://go-review.googlesource.com/81795

From-SVN: r255400

2017-12-04  Steve Ellcey  <sellcey@cavium.com>

	* Makefile.am (ARCH_AARCH64_LINUX): Add IFUNC_OPTIONS and
	libatomic_la_LIBADD.
	* config/linux/aarch64/host-config.h: New file.
	* configure.ac (IFUNC_RESOLVER_ARGS): Define.
	(ARCH_AARCH64_LINUX): New conditional for IFUNC builds.
	* configure.tgt (aarch64): Set ARCH and try_ifunc.
	(aarch64*-*-linux*) Update config_path.
	(aarch64*-*-linux*) Set IFUNC_RESOLVER_ARGS.
	* libatomic_i.h (GEN_SELECTOR): Add IFUNC_RESOLVER_ARGS argument.
	* Makefile.in: Regenerate.
	* auto-config.h.in: Regenerate.
	* configure: Regenerate.

From-SVN: r255399

From-SVN: r255398

	PR target/81616
	* athlon.md: Disable for generic.
	* haswell.md: Enable for generic.
	* i386.c (ix86_sched_init_global): Add core hooks for generic.
	* x86-tune-sched.c (ix86_issue_rate): Increase issue rate for generic
	to 4.
	(ix86_adjust_cost): Move generic to haswell path.

From-SVN: r255395

	* config/sparc/sparc.c (sparc_do_work_around_errata): Use mem_ref
	instead of MEM_P in a couple more places.  Fix formatting issues.

From-SVN: r255393

	* include/bits/regex_compiler.tcc: Use C-style comment to work around
	PR preprocessor/61638.
	(__INSERT_REGEX_MATCHER): Replace GNU extension with __VA_ARGS__.

From-SVN: r255392

	* config/io/basic_file_stdio.h (__basic_file): Remove name of unused
	parameter.
	* include/bits/boost_concept_check.h: Add pragmas to disable
	-Wunused-local-typedef warnings.
	* include/bits/codecvt.h (codecvt_byname<char16_t, char, mbstate_t>)
	(codecvt_byname<char32_t, char, mbstate_t>): Remove name of unused
	parameter.
	* include/bits/locale_facets_nonio.tcc (time_get::do_get_weekday)
	(time_get::do_get_monthname, time_get::do_get_year): Remove unused
	variables.
	* include/std/bitset (_Base_bitset<0>::_M_getword): Remove name of
	unused parameter.
	* include/std/streambuf (_IsUnused): Define.
	(basic_streambuf::imbue, basic_streambuf::pbackfail)
	(basic_streambuf::overflow): Add macro to unused parameters.
	* testsuite/24_iterators/operations/prev_neg.cc: Adjust dg-error.

From-SVN: r255391

	* semantics.c (finish_if_stmt_cond): Use require_constant_expression
	rather than is_constant_expression.
	* constexpr.c (potential_constant_expression_1) [LAMBDA_EXPR]: Allow
	in C++17.

From-SVN: r255390

	gcc/
	* config/riscv/riscv.c (riscv_for_each_saved_reg): Use GP_REG_LAST
	instead of GP_REG_LAST-1.
	(riscv_adjust_libcall_cfi_prologue): Likewise.
	(riscv_adjust_libcall_cri_epilogue): Likewise.
	* config/riscv/riscv.h (CALL_USED_REGISTERS): Change a6 to t6 in
	comment.

From-SVN: r255389

I noticed the debugging output from local-pure-const pass is missing a
newline in a couple places, leading to this:

 local analysis of main
   scanning: i ={v} 0;
    Volatile stmt is not const/pure
    Volatile operand is not const/pure  scanning: j ={v} 20;
    Volatile stmt is not const/pure
    Volatile operand is not const/pure  scanning: vol.0_10 ={v} i;
    Volatile stmt is not const/pure

It should've been:

 local analysis of main
   scanning: i ={v} 0;
    Volatile stmt is not const/pure
    Volatile operand is not const/pure
   scanning: j ={v} 20;
    Volatile stmt is not const/pure
    Volatile operand is not const/pure
   scanning: vol.0_10 ={v} i;
    Volatile stmt is not const/pure

gcc/ChangeLog:

2017-12-04  Luis Machado  <luis.machado@linaro.org>

	* ipa-pure-const.c (check_decl): Add missing newline.
	(state_from_flags): Likewise.

From-SVN: r255388

	PR tree-optimizatin/78496
	* gimple-ssa-evrp-analyze.h
	(evrp_range_analyzer::get_vr_values): Simplify.
	* gimple-ssa-evrp-analyze.c: Corresponding changes.
	* tree-ssa-dom.c: Include alloc-pool.h, tree-vrp.h, vr-values.h
	and gimple-ssa-evrp-analyze.h.
	(dom_opt_dom_walker class): Add evrp_range_analyzer member.
	(simplify_stmt_for_jump_threading): Copy a blob of code from
	tree-vrp.c to use ranges to simplify statements.
	(dom_opt_dom_walker::before_dom_children): Call
	evrp_range_analyzer::{enter,record_ranges_from_stmt} methods.
	(dom_opt_dom_walker::after_dom_children): Similarly for
	evrp_range_analyzer::leave.
	(dom_opt_dom_walker::optimize_stmt): Use EVRP ranges to optimize
	conditionals.

	PR tree-optimization/78496
	* gcc.dg/builtin-unreachable-6.c: Disable DOM.
	* gcc.dg/builtin-unreachable-6a.c: New test.
	* gcc.dg/tree-ssa/20030922-1.c: No longer XFAIL.
	* gcc.dg/ssa-dom-branch-1.c: Tweak expected output.

From-SVN: r255387

	(evrp_range_analyzer::extract_range_from_stmt):  Always use
	vr_values::update_value_range so preexisting range info is
	medged with new range info, even if the new range is VR_VARYING.

From-SVN: r255386

This removes use_crosses_set_p, and uses modified_between_p instead
everywhere it was used.  This improves optimisation.


	* combine.c: Adjust comment.
	(use_crosses_set_p): Delete.
	(can_combine_p): Use modified_between_p instead of use_crosses_set_p.
	(try_combine): Ditto.

From-SVN: r255384

2017-12-04  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/83255
	* graphite-isl-ast-to-gimple.c (translate_isl_ast_node_for):
	Re-add zero-iteration check.

	* gcc.dg/graphite/pr83255.c: New testcase.

From-SVN: r255382

The Newlib time_t has now 64 bits for RTEMS.

gcc/ada

	* gcc-interface/Makefile.in (RTEMS): Use s-osprim__rtems.adb.
	* libgnat/s-osprim__rtems.adb: New file.
	* libgnarl/s-osinte__rtems.adb (pthread_cond_t): Fix alignment.
	(pthread_mutexattr_t): Likewise.
	(pthread_rwlockattr_t): Likewise.
	(pthread_rwlock_t): Likewise.
	(time_t): Use 64-bit integer.

From-SVN: r255380

The documentation (rtl.texi) says:

  When a @code{clobber} expression for a register appears inside a
  @code{parallel} with other side effects, the register allocator
  guarantees that the register is unoccupied both before and after that
  insn if it is a hard register clobber.

and at least the rs6000 backend relies on that (see PR83245).  This
patch restores that behaviour.

Registers that are also used as operands in the instruction are not
treated as earlyclobber, so such insns also still work (PR80818, an
s390 testcase).


	PR rtl-optimization/83245
	* lra.c (collect_non_operand_hard_regs): Treat clobbers of non-operand
	hard registers as earlyclobber, also if not in an asm.

From-SVN: r255377

	PR bootstrap/83265
	Revert
	2017-12-01  Segher Boessenkool  <segher@kernel.crashing.org>

	PR target/43871
	* config/rs6000/rs6000.c (rs6000_option_override_internal): Set
	rs6000_cpu based on cpu_index, not tune_index.

From-SVN: r255376

re PR tree-optimization/83238 ([graphite] ICE in graphite_can_represent_scev, at graphite-scop-detection.c:971)

2017-12-04  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/83238
	* graphite-scop-detection.c (scop_detection::merge_sese): Make
	code match comment, rejecting invalid SESE regions.

	* gcc.dg/graphite/pr83238.c: New testcase.

From-SVN: r255375

2017-12-04  Tom de Vries  <tom@codesourcery.com>

	* gcc.dg/pr82875.c: Require effective target alloca.

From-SVN: r255374

From-SVN: r255372