2017-10-14  Patrick Bernardi  <bernardi@adacore.com>

	* Makefile.rtl (GNATRTL_NONTASKING_OBJ): Add s-soliin to
	GNATRTL_NONTASKING_OBJ.

From-SVN: r253755

2017-10-14  Bob Duff  <duff@adacore.com>

	* exp_ch6.adb (Is_Build_In_Place_Result_Type): Include code for
	enabling b-i-p for nonlimited controlled types (but disabled).

2017-10-14  Justin Squirek  <squirek@adacore.com>

	* sem_elab.adb (Is_Suitable_Variable_Assignment): Replace call to
	Has_Warnings_Off with Warnings_Off.

2017-10-14  Piotr Trojanek  <trojanek@adacore.com>

	* sinfo.ads (Generic_Parent): Remove wrong (possibly obsolete) comment.

2017-10-14  Hristian Kirtchev  <kirtchev@adacore.com>

	* sem_ch3.adb (Analyze_Declarations): Analyze the contract of an
	enclosing package at the end of the visible declarations.
	* sem_prag.adb (Analyze_Initialization_Item): Suppress the analysis of
	an initialization item which is undefined due to some illegality.

2017-10-14  Patrick Bernardi  <bernardi@adacore.com>

	* ali.adb: Add new ALI line 'T' to read the number of tasks contain
	within each unit that require a default-sized primary and secondary
	stack to be generated by the binder.
	(Scan_ALI): Scan new 'T' lines.
	* ali.ads: Add Primary_Stack_Count and Sec_Stack_Count to Unit_Record.
	* bindgen.adb (Gen_Output_File): Count the number of default-sized
	stacks within the closure that are to be created by the binder.
	(Gen_Adainit, Gen_Output_File_Ada): Generate default-sized secondary
	stacks and record these in System.Secodnary_Stack.
	(Resolve_Binder_Options): Check if System.Secondary_Stack is in the
	closure of the program being bound.
	* bindusg.adb (Display): Add "-Q" switch. Remove rouge "--RTS" comment.
	* exp_ch3.adb (Count_Default_Sized_Task_Stacks): New routine.
	(Expand_N_Object_Declaration): Count the number of default-sized stacks
	used by task objects contained within the object whose declaration is
	being expanded.  Only performed when either the restrictions
	No_Implicit_Heap_Allocations or No_Implicit_Task_Allocations are in
	effect.
	* exp_ch9.adb (Create_Secondary_Stack_For_Task): New routine.
	(Expand_N_Task_Type_Declaration): Create a secondary stack as part of
	the expansion of a task type if the size of the stack is known at
	run-time and the restrictions No_Implicit_Heap_Allocations or
	No_Implicit_Task_Allocations are in effect.
	(Make_Task_Create_Call): If using a restricted profile provide
	secondary stack parameter: either the statically created stack or null.
	* lib-load.adb (Create_Dummy_Package_Unit, Load_Unit,
	Load_Main_Source): Include Primary_Stack_Count and Sec_Stack_Count in
	Unit_Record initialization expressions.
	* lib-writ.adb (Add_Preprocessing_Dependency,
	Ensure_System_Dependency): Include Primary_Stack_Count and
	Sec_Stack_Count in Unit_Record initialization expression.
	(Write_ALI): Write T lines.
	(Write_Unit_Information): Do not output 'T' lines if there are no
	stacks for the binder to generate.
	* lib-writ.ads: Updated library information documentation to include
	new T line entry.
	* lib.adb (Increment_Primary_Stack_Count): New routine.
	(Increment_Sec_Stack_Count): New routine.
	(Primary_Stack_Count): New routine.
	(Sec_Stack_Count): New routine.
	* lib.ads: Add Primary_Stack_Count and Sec_Stack_Count components to
	Unit_Record and updated documentation.
	(Increment_Primary_Stack_Count): New routine along with pragma Inline.
	(Increment_Sec_Stack_Count): New routine along with pragma Inline.
	(Primary_Stack_Count): New routine along with pragma Inline.
	(Sec_Stack_Count): New routine along with pragma Inline.
	* opt.ads: New constant No_Stack_Size.	Flag Default_Stack_Size
	redefined.  New flag Default_Sec_Stack_Size and
	Quantity_Of_Default_Size_Sec_Stacks.
	* rtfinal.c Fixed erroneous comment.
	* rtsfind.ads: Moved RE_Default_Secondary_Stack_Size from
	System.Secondary_Stack to System.Parameters.  Add RE_SS_Stack.
	* sem_util.adb (Number_Of_Elements_In_Array): New routine.
	* sem_util.ads (Number_Of_Elements_In_Array): New routine.
	* switch-b.adb (Scan_Binder_Switches): Scan "-Q" switch.
	* libgnarl/s-solita.adb (Get_Sec_Stack_Addr): Removed routine.
	(Set_Sec_Stack_Addr): Removed routine.
	(Get_Sec_Stack): New routine.
	(Set_Sec_Stack): New routine.
	(Init_Tasking_Soft_Links): Update System.Soft_Links reference to
	reflect new procedure and global names.
	* libgnarl/s-taprop__linux.adb, libgnarl/s-taprop__mingw.adb,
	libgnarl/s-taprop__posix.adb, libgnarl/s-taprop__solaris.adb,
	libgnarl/s-taprop__vxworks.adb (Register_Foreign_Thread): Update
	parameter profile to allow the secondary stack size to be specified.
	* libgnarl/s-tarest.adb (Create_Restricted_Task): Update the parameter
	profile to include Sec_Stack_Address.  Update Tasking.Initialize_ATCB
	call to remove Secondary_Stack_Size reference.  Add secondary stack
	address and size to SSL.Create_TSD call.
	(Task_Wrapper): Remove secondary stack creation.
	* libgnarl/s-tarest.ads (Create_Restricted_Task,
	Create_Restricted_Task_Sequential): Update parameter profile to include
	Sec_Stack_Address and clarify the Size parameter.
	* libgnarl/s-taskin.adb (Initialize_ATCB): Remove Secondary_Stack_Size
	from profile and body.
	(Initialize): Remove Secondary_Stack_Size from Initialize_ATCB call.
	* libgnarl/s-taskin.ads: Removed component Secondary_Stack_Size from
	Common_ATCB.
	(Initialize_ATCB): Update the parameter profile to remove
	Secondary_Stack_Size.
	* libgnarl/s-tassta.adb (Create_Task): Updated parameter profile and
	call to Initialize_ATCB.  Add secondary stack address and size to
	SSL.Create_TSD call, and catch any storage exception from the call.
	(Finalize_Global_Tasks): Update System.Soft_Links references to reflect
	new subprogram and component names.
	(Task_Wrapper): Remove secondary stack creation.
	(Vulnerable_Complete_Master): Update to reflect TSD changes.
	* libgnarl/s-tassta.ads: Reformat comments.
	(Create_Task): Update parameter profile.
	* libgnarl/s-tporft.adb (Register_Foreign_Thread): Update parameter
	profile to include secondary stack size. Remove secondary size
	parameter from Initialize_ATCB call and add it to Create_TSD call.
	* libgnat/s-parame.adb, libgnat/s-parame__rtems.adb,
	libgnat/s-parame__vxworks.adb (Default_Sec_Stack_Size): New routine.
	* libgnat/s-parame.ads, libgnat/s-parame__ae653.ads,
	libgnat/s-parame__hpux.ads, libgnat/s-parame__vxworks.ads: Remove type
	Percentage.  Remove constants Dynamic, Sec_Stack_Percentage and
	Sec_Stack_Dynamic.  Add constant Runtime_Default_Sec_Stack_Size and
	Sec_Stack_Dynamic.
	(Default_Sec_Stack_Size): New routine.
	* libgnat/s-secsta.adb, libgnat/s-secsta.ads: New implementation. Is
	now Preelaborate.
	* libgnat/s-soflin.adb: Removed unused with-clauses.  With
	System.Soft_Links.Initialize to initialize non-tasking TSD.
	(Create_TSD): Update parameter profile. Initialize the TSD and
	unconditionally call SS_Init.
	(Destroy_TSD): Update SST.SS_Free call.
	(Get_Sec_Stack_Addr_NT, Get_Sec_Stack_Addr_Soft, Set_Sec_Stack_Addr_NT,
	Set_Sec_Stack_Addr_Soft): Remove routines.
	(Get_Sec_Stack_NT, Get_Sec_Stack_Soft, Set_Sec_Stack_NT,
	Set_Sec_Stack_Soft): Add routines.
	(NT_TSD): Move to private part of package specification.
	* libgnat/s-soflin.ads: New types Get_Stack_Call and Set_Stack_Call
	with suppressed access checks.  Renamed *_Sec_Stack_Addr_* routines and
	objects to *_Sec_Stack_*.  TSD: removed warning suppression and
	component intialization. Changed Sec_Stack_Addr to Sec_Stack_Ptr.
	(Create_TSD): Update parameter profile.
	(NT_TSD): Move to private section from body.
	* libgnat/s-soliin.adb, libgnat/s-soliin.ads: New files.
	* libgnat/s-thread.ads (Thread_Body_Enter): Update parameter profile.
	* libgnat/s-thread__ae653.adb (Get_Sec_Stack_Addr, Set_Sec_Stack_Addr):
	Remove routine.
	(Get_Sec_Stack, Set_Sec_Stack): Add routine.
	(Thread_Body_Enter): Update parameter profile and body to adapt to new
	System.Secondary_Stack.
	(Init_RTS): Update body for new System.Soft_Links names.
	* gcc-interface/Make-lang.in (GNAT_ADA_OBJS, GNATBIND_OBJS): Add
	s-soliin.o.

From-SVN: r253754

	PR bootstrap/82548
	* config.gcc (*-*-solaris2*, i[34567]86-*-cygwin*,
	x86_64-*-cygwin*, i[34567]86-*-mingw* | x86_64-*-mingw*): Append
	objects to extra_objs instead of overwriting it.

From-SVN: r253753

From-SVN: r253752

sync.md (FILD_ATOMIC/FIST_ATOMIC FP load peephole2): Use any_fp_register_operand as operand[3] predicate.

	* config/i386/sync.md (FILD_ATOMIC/FIST_ATOMIC FP load peephole2):
	Use any_fp_register_operand as operand[3] predicate.  Simplify
	equality test for operands[2] and operands[4] memory location.
	(LDX_ATOMIC/STX_ATOMIC FP load peephole2): Ditto.
	(FILD_ATOMIC/FIST_ATOMIC FP load peephole2 with mem blockage): New.
	(LDX_ATOMIC/LDX_ATOMIC FP load peephole2 with mem blockage): Ditto.
	(FILD_ATOMIC/FIST_ATOMIC FP store peephole2): Use
	any_fp_register_operand as operand[1] predicate.  Simplify
	equality test for operands[0] and operands[3] memory location.
	(LDX_ATOMIC/STX_ATOMIC FP store peephole2): Ditto.
	(FILD_ATOMIC/FIST_ATOMIC FP store peephole2 with mem blockage): New.
	(LDX_ATOMIC/LDX_ATOMIC FP storepeephole2 with mem blockage): Ditto.

From-SVN: r253751

	* target-insns.def: Add memory_blockage.
	* optabs.c (expand_memory_blockage): New function.
	(expand_asm_memory_barrier): Rename ...
	(expand_asm_memory_blockage): ... to this.
	(expand_mem_thread_fence): Call expand_memory_blockage
	instead of expand_asm_memory_barrier.
	(expand_mem_singnal_fence): Ditto.
	(expand_atomic_load): Ditto.
	(expand_atomic_store): Ditto.
	* doc/md.texi (Standard Pattern Names For Generation):
	Document memory_blockage instruction pattern.

From-SVN: r253750

	PR rtl-optimization/81423
	* gcc.c-torture/execute/pr81423.c (foo): Add missing cast.  Change L
	suffixes to LL.
	(main): Punt if either long long isn't 64-bit or int isn't 32-bit.

From-SVN: r253749

[gcc]
	* config/rl78/rl78.c (rl78_emit_libcall): New function.
	* config/rl78/rl78-protos.h (rl78_emit_libcall): New function.
	* config/rl78/rl78.md: New define_expand "adddi3".
[libgcc]
	* config/rl78/adddi3.S: New assembly file.
	* config/rl78/t-rl78: Added adddi3.S to LIB2ADD.

From-SVN: r253748

From-SVN: r253747

	PR sanitizer/82353
	* g++.dg/ubsan/pr82353-2.C: New test.
	* g++.dg/ubsan/pr82353-2-aux.cc: New file.
	* g++.dg/ubsan/pr82353-2.h: New file.

From-SVN: r253744

	* c-gimplify.c (c_gimplify_expr): Handle [LR]ROTATE_EXPR like
	[LR]SHIFT_EXPR.

From-SVN: r253742

	* cfghooks.c (verify_flow_info): Disable check that all probabilities
	are set correctly.

From-SVN: r253741

From-SVN: r253740

	* tree.c (cp_stabilize_reference): Just return a NON_DEPENDENT_EXPR.

From-SVN: r253739

2017-10-13  Paul Thomas  <pault@gcc.gnu.org>

	PR fortran/81048
	* resolve.c (resolve_symbol): Ensure that derived type array
	results get default initialization.

2017-10-13  Paul Thomas  <pault@gcc.gnu.org>

	PR fortran/81048
	* gfortran.dg/derived_init_4.f90 : New test.

From-SVN: r253738

re PR c++/69078 ([C++14] function local static not initialized when only used in a generic/variadic lambda)

2017-10-13  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/69078
	* g++.dg/cpp1y/lambda-generic-69078-1.C: New.
	* g++.dg/cpp1y/lambda-generic-69078-2.C: Likewise.

From-SVN: r253736

re PR target/82274 (__builtin_mul_overflow fails to detect overflow for int64_t when compiled with -m32)

	PR target/82274
	* internal-fn.c (expand_mul_overflow): If both operands have
	the same highpart of -1 or 0 and the topmost bit of lowpart
	is different, overflow is if res <= 0 rather than res < 0.

	* libgcc2.c (__mulvDI3): If both operands have
	the same highpart of -1 and the topmost bit of lowpart is 0,
	multiplication overflows even if both lowparts are 0.

	* gcc.dg/pr82274-1.c: New test.
	* gcc.dg/pr82274-2.c: New test.

From-SVN: r253734

re PR c++/80873 (ICE in tsubst_copy when trying to use an overloaded function without a definition in a lambda)

2017-10-13  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/80873
	* g++.dg/cpp1y/auto-fn41.C: New.
	* g++.dg/cpp1y/auto-fn42.C: Likewise.

From-SVN: r253733

	* config/rs6000/rs6000.c (rs6000_builtin_vectorization_cost): Remove
	TARGET_P9_VECTOR code for unaligned_load case.

From-SVN: r253731

2017-10-13  Mike Frysinger  <vapier@chromium.org>

	* fixinc.in (dirname): Change sed from 's|[^/]*/||' to
	's|[^/]*//*||'.

From-SVN: r253730

From-SVN: r253729

	* cfghooks.c (verify_flow_info): Check that edge probabilities are
	set.

From-SVN: r253728

If the user fails to close an extern "C" linkage specifier, and then
uses templates, they will run into "template with C linkage" errors.

From personal experience, it can be hard to tell where the
extern "C" began.  As of r251026 there will be a message highlighting
the unclosed '{', but this may be hard to spot at the very end of
the errors.

This patch adds a note to the various diagnostics that complain
about C linkage, showing the user where the extern "C" specification
began.

gcc/cp/ChangeLog:
	* cp-tree.h (maybe_show_extern_c_location): New decl.
	* decl.c (grokfndecl): When complaining about literal operators
	with C linkage, issue a note giving the location of the
	extern "C".
	* parser.c (cp_parser_new): Initialize new field
	"innermost_linkage_specification_location".
	(cp_parser_linkage_specification): Store the location
	of the linkage specification within the cp_parser.
	(cp_parser_explicit_specialization): When complaining about
	template specializations with C linkage, issue a note giving the
	location of the extern "C".
	(cp_parser_explicit_template_declaration): Likewise for templates.
	(maybe_show_extern_c_location): New function.
	* parser.h (struct cp_parser): New field
	"innermost_linkage_specification_location".

gcc/testsuite/ChangeLog:
	* g++.dg/cpp0x/udlit-extern-c.C: New test case.
	* g++.dg/diagnostic/unclosed-extern-c.C: Add example of a template
	erroneously covered by an unclosed extern "C".
	* g++.dg/template/extern-c.C: New test case.

From-SVN: r253726

	PR libstdc++/82522
	* doc/xml/manual/intro.xml: Document LWG 2354 changes.
	* include/bits/stl_map.h (map::insert(value_type&&))
	(map::insert(const_iterator, value_type&&)): Add overload for rvalues.
	* include/bits/stl_multimap.h (multimap::insert(value_type&&))
	(multimap::insert(const_iterator, value_type&&)): Likewise.
	* include/bits/unordered_map.h (unordered_map::insert(value_type&&))
	(unordered_map::insert(const_iterator, value_type&&))
	(unordered_multimap::insert(value_type&&))
	(unordered_multimap::insert(const_iterator, value_type&&)): Likewise.
	* testsuite/23_containers/map/modifiers/insert/dr2354.cc: New test.
	* testsuite/23_containers/multimap/modifiers/insert/dr2354.cc: New
	test.
	* testsuite/23_containers/unordered_map/insert/dr2354.cc: New test.
	* testsuite/23_containers/unordered_multimap/insert/dr2354.cc: New
	test.

From-SVN: r253725

	PR libstdc++/82481
	* include/std/mutex (call_once): Suppress clang-tidy warnings about
	dangling references.

From-SVN: r253724

https://gcc.gnu.org/ml/gcc-patches/2017-10/msg00846.html
	* tree-core.h (tree_contains_struct): Make bool.
	* tree.c (tree_contains_struct): Likewise.
	* tree.h (MARK_TS_BASE): Remove do ... while (0) idiom.
	(MARK_TS_TYPED, MARK_TS_COMMON, MARK_TS_TYPE_COMMON,
	MARK_TS_TYPE_WITH_LANG_SPECIFIC, MARK_TS_DECL_MINIMAL,
	MARK_TS_DECL_COMMON, MARK_TS_DECL_WRTL, MARK_TS_DECL_WITH_VIS,
	MARK_TS_DECL_NON_COMMON): Likewise, use comma operator.

From-SVN: r253723

	* graphite-isl-ast-to-gimple.c
	(translate_isl_ast_to_gimple::get_rename_from_scev): Remove unused
	parameters and dominance check.
	(translate_isl_ast_to_gimple::graphite_copy_stmts_from_block): Adjust.
	(translate_isl_ast_to_gimple::copy_bb_and_scalar_dependences): Likewise.
	(translate_isl_ast_to_gimple::graphite_regenerate_ast_isl):
	Do not update SSA form here or do intermediate IL verification.
	* graphite.c: Include tree-ssa.h and tree-into-ssa.h.
	(graphite_initialize): Remove check on the number of loops in
	the function and inline into graphite_transform_loops.
	(graphite_finalize): Inline into graphite_transform_loops.
	(graphite_transform_loops): Perform SSA update and IL verification
	here.
	* params.def (PARAM_GRAPHITE_MIN_LOOPS_PER_FUNCTION): Remove.

	* gcc.dg/graphite/pr35356-3.c: XFAIL again.
	* gcc.dg/graphite/pr81373-2.c: Copy from gcc.dg/graphite/pr81373.c
	with alternate flags.

From-SVN: r253721

	* graphite-isl-ast-to-gimple.c
	(translate_isl_ast_to_gimple::get_rename_from_scev): Remove unused
	parameters and dominance check.
	(translate_isl_ast_to_gimple::graphite_copy_stmts_from_block): Adjust.
	(translate_isl_ast_to_gimple::copy_bb_and_scalar_dependences): Likewise.
	(translate_isl_ast_to_gimple::graphite_regenerate_ast_isl):
	Do not update SSA form here or do intermediate IL verification.
	* graphite.c: Include tree-ssa.h and tree-into-ssa.h.
	(graphite_initialize): Remove check on the number of loops in
	the function and inline into graphite_transform_loops.
	(graphite_finalize): Inline into graphite_transform_loops.
	(graphite_transform_loops): Perform SSA update and IL verification
	here.
	* params.def (PARAM_GRAPHITE_MIN_LOOPS_PER_FUNCTION): Remove.

	* gcc.dg/graphite/pr35356-3.c: XFAIL again.
	* gcc.dg/graphite/pr81373-2.c: Copy from gcc.dg/graphite/pr81373.c
	with alternate flags.

From-SVN: r253720

graphite-isl-ast-to-gimple.c (max_mode_int_precision, [...]): Avoid global constructor by moving ...

2017-10-13  Richard Biener  <rguenther@suse.de>

	* graphite-isl-ast-to-gimple.c (max_mode_int_precision,
	graphite_expression_type_precision): Avoid global constructor
	by moving ...
	(translate_isl_ast_to_gimple::translate_isl_ast_to_gimple): Here.
	(translate_isl_ast_to_gimple::graphite_expr_type): Add type
	member.
	(translate_isl_ast_to_gimple::translate_isl_ast_node_for): Use it.
	(translate_isl_ast_to_gimple::build_iv_mapping): Likewise.
	(translate_isl_ast_to_gimple::graphite_create_new_guard): Likewise.
	* graphite-sese-to-poly.c (build_original_schedule): Return nothing.

	* gcc.dg/graphite/scop-10.c: Enlarge array to avoid undefined
	behavior.
	* gcc.dg/graphite/scop-7.c: Likewise.
	* gcc.dg/graphite/scop-8.c: Likewise.

From-SVN: r253719

Check red zone size, instead of if red zone is available, in push
peephole2s.

gcc/

	PR target/82499
	* config/i386/i386.h (ix86_red_zone_size): New.
	* config/i386/i386.md (push peephole2s): Replace
	"!ix86_using_red_zone ()" with "ix86_red_zone_size == 0".

gcc/testsuite/

	PR target/82499
	* gcc.target/i386/pr82499-1.c: New file.
	* gcc.target/i386/pr82499-2.c: Likewise.
	* gcc.target/i386/pr82499-3.c: Likewise.

From-SVN: r253718

This patch stops combine from changing the mode of an existing register
in-place if doing so would change the size of the underlying register
allocation size, as given by REGMODE_NATURAL_SIZE.  Without this,
many tests fail in adjust_reg_mode after SVE is added.  One example
is gcc.c-torture/compile/20090401-1.c.

2017-10-13  Richard Sandiford  <richard.sandiford@linaro.org>
	    Alan Hayward  <alan.hayward@arm.com>
	    David Sherwood  <david.sherwood@arm.com>

gcc/
	* combine.c (can_change_dest_mode): Reject changes in
	REGMODE_NATURAL_SIZE.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>

From-SVN: r253717

This patch is like the previous GET_MODE_UNIT_SIZE one,
but for bit rather than byte sizes.

2017-10-13  Richard Sandiford  <richard.sandiford@linaro.org>
	    Alan Hayward  <alan.hayward@arm.com>
	    David Sherwood  <david.sherwood@arm.com>

gcc/
	* cfgexpand.c (expand_debug_expr): Use GET_MODE_UNIT_BITSIZE.
	(expand_debug_source_expr): Likewise.
	* combine.c (combine_simplify_rtx): Likewise.
	* cse.c (fold_rtx): Likewise.
	* fwprop.c (canonicalize_address): Likewise.
	* targhooks.c (default_shift_truncation_mask): Likewise.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>

From-SVN: r253716

This patch uses GET_MODE_UNIT_SIZE instead of GET_MODE_SIZE in
cases where, for compound modes, the mode of the scalar elements
is what matters.  E.g. the choice between truncation and extension
is really based on the modes of the consistuent scalars rather
than the mode as a whole.

None of the existing code was wrong.  The patch simply makes
things easier when converting to variable-sized modes.

2017-10-13  Richard Sandiford  <richard.sandiford@linaro.org>
	    Alan Hayward  <alan.hayward@arm.com>
	    David Sherwood  <david.sherwood@arm.com>

gcc/
	* optabs.c (add_equal_note): Use GET_MODE_UNIT_SIZE.
	(widened_mode): Likewise.
	(expand_unop): Likewise.
	* ree.c (transform_ifelse): Likewise.
	(merge_def_and_ext): Likewise.
	(combine_reaching_defs): Likewise.
	* simplify-rtx.c (simplify_unary_operation_1): Likewise.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>

From-SVN: r253715

This patch uses byte_lowpart_offset in places that open-coded the
calculation.

2017-10-13  Richard Sandiford  <richard.sandiford@linaro.org>
	    Alan Hayward  <alan.hayward@arm.com>
	    David Sherwood  <david.sherwood@arm.com>

gcc/
	* caller-save.c (replace_reg_with_saved_mem): Use byte_lowpart_offset.
	* combine.c (gen_lowpart_for_combine): Likewise.
	* dwarf2out.c (rtl_for_decl_location): Likewise.
	* final.c (alter_subreg): Likewise.
	* rtlhooks.c (gen_lowpart_general): Likewise.
	(gen_lowpart_if_possible): Likewise.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>

From-SVN: r253714

This patch uses subreg_lowpart_offset in places that open-coded
the calculation.  It also uses it in regcprop.c to test whether,
after a mode change, the first register in a multi-register group
is still the right one.

2017-10-13  Richard Sandiford  <richard.sandiford@linaro.org>
	    Alan Hayward  <alan.hayward@arm.com>
	    David Sherwood  <david.sherwood@arm.com>

gcc/
	* calls.c (expand_call): Use subreg_lowpart_offset.
	* cse.c (cse_insn): Likewise.
	* regcprop.c (copy_value): Likewise.
	(copyprop_hardreg_forward_1): Likewise.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>

From-SVN: r253713

	PR target/82524
	* config/i386/i386.md (addqi_ext_1, andqi_ext_1,
	*andqi_ext_1_cc, *<code>qi_ext_1, *xorqi_ext_1_cc): Change
	=Q constraints to +Q and into insn condition add check
	that operands[0] and operands[1] are equal.
	(*addqi_ext_2, *andqi_ext_2, *<code>qi_ext_2): Change
	=Q constraints to +Q and into insn condition add check
	that operands[0] is equal to either operands[1] or operands[2].

	* gcc.c-torture/execute/pr82524.c: New test.

From-SVN: r253710

	PR target/82498
	* fold-const.c (fold_binary_loc) <bit_rotate>: Code cleanups,
	instead of handling MINUS_EXPR twice (once for each argument),
	canonicalize operand order and handle just once, use rtype where
	possible.  Handle (A << B) | (A >> (-B & (Z - 1))).

	* gcc.dg/tree-ssa/pr82498.c: New test.

From-SVN: r253709

	PR target/82498
	* config/i386/ia32intrin.h (__rold, __rord, __rolq, __rorq): Allow
	any values of __C while still being pattern recognizable as a simple
	rotate instruction.

	* gcc.dg/ubsan/pr82498.c: New test.

From-SVN: r253708

2017-10-13  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/82451
	Revert
	2017-10-02  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/82355
	* graphite-isl-ast-to-gimple.c (build_iv_mapping): Also build
	a mapping for the enclosing loop but avoid generating one for
	the loop tree root.
	(copy_bb_and_scalar_dependences): Remove premature codegen
	error on PHIs in blocks duplicated into multiple places.
	* graphite-scop-detection.c
	(scop_detection::stmt_has_simple_data_refs_p): For a loop not
	in the region use it as loop and nest to analyze the DR in.
	(try_generate_gimple_bb): Likewise.
	* graphite-sese-to-poly.c (extract_affine_chrec): Adjust.
	(add_loop_constraints): For blocks in a loop not in the region
	create a dimension with a single iteration.
	* sese.h (gbb_loop_at_index): Remove assert.

	* cfgloop.c (loop_preheader_edge): For the loop tree root
	return the single successor of the entry block.
	* graphite-isl-ast-to-gimple.c (graphite_regenerate_ast_isl):
	Reset the SCEV hashtable and niters.
	* graphite-scop-detection.c
	(scop_detection::graphite_can_represent_scev): Add SCOP parameter,
	assert that we only have POLYNOMIAL_CHREC that vary in loops
	contained in the region.
	(scop_detection::graphite_can_represent_expr): Adjust.
	(scop_detection::stmt_has_simple_data_refs_p): For loops
	not in the region set loop to NULL.  The nest is now the
	entry edge to the region.
	(try_generate_gimple_bb): Likewise.
	* sese.c (scalar_evolution_in_region): Adjust for
	instantiate_scev change.
	* tree-data-ref.h (graphite_find_data_references_in_stmt):
	Make nest parameter the edge into the region.
	(create_data_ref): Likewise.
	* tree-data-ref.c (dr_analyze_indices): Make nest parameter an
	entry edge into a region and adjust instantiate_scev calls.
	(create_data_ref): Likewise.
	(graphite_find_data_references_in_stmt): Likewise.
	(find_data_references_in_stmt): Pass the loop preheader edge
	from the nest argument.
	* tree-scalar-evolution.h (instantiate_scev): Make instantiate_below
	parameter the edge into the region.
	(instantiate_parameters): Use the loop preheader edge as entry.
	* tree-scalar-evolution.c (analyze_scalar_evolution): Handle
	NULL loop.
	(get_instantiated_value_entry): Make instantiate_below parameter
	the edge into the region.
	(instantiate_scev_name): Likewise.  Adjust dominance checks,
	when we cannot use loop-based instantiation instantiate by
	walking use-def chains.
	(instantiate_scev_poly): Adjust.
	(instantiate_scev_binary): Likewise.
	(instantiate_scev_convert): Likewise.
	(instantiate_scev_not): Likewise.
	(instantiate_array_ref): Remove.
	(instantiate_scev_3): Likewise.
	(instantiate_scev_2): Likewise.
	(instantiate_scev_1): Likewise.
	(instantiate_scev_r): Do not blindly handle N-operand trees.
	Do not instantiate array-refs.  Handle all constants and invariants.
	(instantiate_scev): Make instantiate_below parameter
	the edge into the region.
	(resolve_mixers): Use the loop preheader edge for the region
	parameter to instantiate_scev_r.
	* tree-ssa-loop-prefetch.c (determine_loop_nest_reuse): Adjust.

	* gcc.dg/graphite/pr82451.c: New testcase.
	* gfortran.dg/graphite/id-27.f90: Likewise.
	* gfortran.dg/graphite/pr82451.f: Likewise.

From-SVN: r253707

2017-10-13  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/82525
	* graphite-isl-ast-to-gimple.c
	(translate_isl_ast_to_gimple::widest_int_from_isl_expr_int): Split
	out from ...
	(translate_isl_ast_to_gimple::gcc_expression_from_isl_expr_int): Here.
	Fail code generation when we cannot represent the isl integer.
	(binary_op_to_tree): Elide modulo operations that are no-ops
	in the type we code generate.  Remove now superfluous code
	generation errors.

	* gcc.dg/graphite/id-30.c: New testcase.
	* gfortran.dg/graphite/id-28.f90: Likewise.

From-SVN: r253706