Revert the fragile and complicated changes to assign_parms designed to
enable it to use RTL assigments chosen by cfgexpand, and instead have
cfgexpand use the RTL assignments by assign_parms, keying them off of
the default defs that are now necessarily introduced for each parm and
result.  The possible lack of a default def was already a problem, and
the fallbacks in place were not enough, as shown by PR67312.  We now
have checking asserts in set_rtl that verify that we're assigning to
each var a piece of RTL that matches the expectations set forth by
use_register_for_decl.

for  gcc/ChangeLog

	PR rtl-optimization/64164
	PR tree-optimization/67312
	PR middle-end/67340
	PR middle-end/67490
	PR bootstrap/67597
	* cfgexpand.c (parm_in_stack_slot_p): Remove.
	(ssa_default_def_partition): Remove.
	(get_rtl_for_parm_ssa_default_def): Remove.
	(set_rtl): Check that RTL assignments match expectations.
	Loop on SUBREGs, CONCATs and PARALLELs subexprs.  Set only the
	default def location for params and results.  Record SSA names
	or types in REG and MEM attrs, respectively.
	(set_parm_rtl): New.
	(expand_one_ssa_partition): Drop logic that assigned MEMs with
	unassigned addresses.
	(adjust_one_expanded_partition_var): Don't accept NULL RTL on
	deferred stack alloc vars.
	(expand_used_vars): Skip partitions holding parm default defs.
	Move adjust_one_expanded_partition_var loop...
	(pass_expand::execute): ... here.  Drop redundant assert.
	Adjust comments before the final loop over all ssa names.
	Require assigned rtl of parms and results to match exactly.
	Reset its attributes to match them, not any other variables in
	the same partition.
	(expand_debug_expr): Use entry value for PARM's default defs
	only iff they have zero nondebug uses.
	* cfgexpand.h (parm_in_stack_slot_p): Remove.
	(get_rtl_for_parm_ssa_default_def): Remove.
	(set_parm_rtl): Declare.
	* doc/invoke.texi: Improve wording.
	* explow.c (promote_decl_mode): Fix promote_function_mode for
	result decls not by reference.
	(promote_ssa_mode): Disregard BLKmode from promote_decl, and
	bypass TYPE_MODE to get the actual vector mode.
	* function.c: Include tree-dfa.h.  Revert 2015-08-14's and
	2015-08-19's changes as follows.  Drop include of
	basic-block.h and df.h.
	(rtl_for_parm): Remove.
	(maybe_reset_rtl_for_parm): Remove.
	(parm_in_unassigned_mem_p): Remove.
	(use_register_for_decl): Add logic for RESULT_DECLs matching
	assign_parms' behavior.
	(split_complex_args): Revert.
	(assign_parms_augmented_arg_list): Revert.  Add comment
	referencing the logic above.
	(assign_parm_adjust_stack_rtl): Revert.
	(assign_parm_setup_block): Revert.  Use set_parm_rtl instead
	of SET_DECL_RTL.  Set up a REG if the parm demands so.
	(assign_parm_setup_reg): Revert.  Consolidated SET_DECL_RTL
	calls into a single set_parm_rtl.  Set up a temporary RTL
	temporarily for expand_assignment.
	(assign_parm_setup_stack): Revert.  Use set_parm_rtl.
	(assign_parms_unsplit_complex): Revert.  Use set_parm_rtl.
	(assign_bounds): Revert.
	(assign_parms): Revert.  Use set_parm_rtl.
	(allocate_struct_function): Relayout result and parms of
	non-abstruct functions.
	(expand_function_start): Revert.  Use set_parm_rtl.  If the
	result is not a hard reg, create a pseudo from the promoted
	mode of the default def.  Promote static chain mode.
	* tree-outof-ssa.c (remove_ssa_form): Drop unused
	partition_has_default_def.  Set up
	partitions_for_parm_default_defs.
	(finish_out_of_ssa): Remove partition_has_default_def.
	Release partitions_for_parm_default_defs.
	* tree-outof-ssa.h (struct ssaexpand): Remove
	partition_has_default_def.  Add
	partitions_for_parm_default_defs.
	* tree-ssa-coalesce.c: Include tree-dfa.h, tm_p.h and
	stor-layout.h.
	(build_ssa_conflict_graph): Fix conflict-detection of default
	defs of even unused default defs of params and results.
	(for_all_parms): New.
	(create_default_def): New.
	(register_default_def): New.
	(coalesce_with_default): New.
	(create_outofssa_var_map): Create default defs for all parms
	and results, and register their partitions.  Add GIMPLE_RETURN
	operands as coalesce candidates with results.  Add default
	defs of each parm or result as coalesce candidates with its
	other defs.  Mark each result def, and each default def of
	parms, as used_in_copy.
	(gimple_can_coalesce_p): Call it.  Call use_register_for_decl
	with the ssa names, even anonymous ones.  Drop
	parm_in_stack_slot_p calls.  Require same signedness and
	alignment.
	(coalesce_ssa_name): Add coalesce candidates for all defs of
	each parm and result, even unused ones.
	(parm_default_def_partition_arg): New type.
	(set_parm_default_def_partition): New.
	(get_parm_default_def_partitions): New.
	* tree-ssa-coalesce.h (get_parm_default_def_partitions): New.
	* tree-ssa-live.c (partition_view_init): Regard unused defs of
	parms and results as used.
	(verify_live_on_entry): Don't error out just because they're
	not live.

for  gcc/testsuite/ChangeLog

	PR rtl-optimization/64164
	PR tree-optimization/67312
	* gcc.dg/pr67312.c: New.  From Zdenek Sojka.
	* gcc.target/i386/stackalign/return-4.c: Add -O.

From-SVN: r228175

From-SVN: r228174

From-SVN: r228173

This adds the missing deep copy when assiging a constructor of a derived
type with allocatable components to an array.

The check for constantness is removed so that the deep_copy argument passed
to gfc_trans_scalar_assign is set to true.

	PR fortran/67721
gcc/fortran/
	* trans-expr.c (gfc_trans_assignment_1): Remove the non-constantness
	condition guarding deep copy.
gcc/testsuite/
	* gfortran.dg/alloc_comp_deep_copy_3.f03: New.

From-SVN: r228170

2013-09-26  Paul Thomas  <pault@gcc.gnu.org>

	PR fortran/67567
	* resolve.c (resolve_fl_procedure): For module procedures, take
	the parent module name and the submodule name from the name of
	the namespace.

From-SVN: r228169

        * gcc.dg/pr64935-1.c: XFAIL on AIX.
        * gcc.dg/pr64935-2.c: XFAIL on AIX.
        * gcc.dg/debug/dwarf2/dwarf2-macro2.c: XFAIL Start new file on AIX.
        * gcc.dg/debug/dwarf2/dwarf2-macro2.c: XFAIL At line number on AIX.
        * gcc.dg/debug/dwarf2/global-used-types.c: XFAIL ascii on AIX.
        * gcc.dg/debug/dwarf2/noreturn-function-keyword.c: XFAIL
        DW_AT_noreturn on AIX.
        * gcc.dg/debug/dwarf2/noreturn-function-attribute.c: XFAIL
        DW_AT_noreturn on AIX.
        * gcc.dg/debug/dwarf2/lang-c89.c: XFAIL DW_AT_language on AIX.
        * gcc.dg/debug/dwarf2/stacked-qualified-types-3.c: XFAIL DW_TAG on AIX.
        * g++.dg/debug/dwarf2/deleted-member-function.C: XFAIL
        DW_AT_GNU_deleted on AIX.
        * g++.dg/debug/dwarf2/noreturn-function.C: XFAIL DW_AT_noreturn on AIX.
        * g++.dg/debug/dwarf2/template-params-6.C: XFAIL ascii on AIX.
        * g++.dg/debug/dwarf2/dwarf4-nested.C: XFAIL ascii on AIX.
        * g++.dg/debug/dwarf2/pubnames-2.C: Skip on AIX.
        * g++.dg/debug/dwarf2/pr44641.C: Skip on AIX.
        * g++.dg/debug/dwarf2/pr46527.C: XFAIL on AIX.
        * g++.dg/debug/dwarf2/imported-decl-2.C: XFAIL ascii on AIX.
        * g++.dg/debug/dwarf2/namespace-1.C: XFAIL ascii on AIX.
        * g++.dg/debug/dwarf2/global-used-types-1.C: XFAIL ascii on AIX.
        * g++.dg/debug/dwarf2/lambda1.C: XFAIL ascii on AIX.
        * g++.dg/debug/dwarf2/pubnames-3.C: Skip on AIX.
        * g++.dg/debug/dwarf2/pr61433.C: XFAIL on AIX.
        * g++.dg/debug/dwarf2/nested-4.C: XFAIL on AIX.
        * g++.dg/debug/dwarf2/template-func-params-6.C: XFAIL ascii on AIX.
        * g++.dg/debug/dwarf2/lineno-simple1.C: XFAIL on AIX.

From-SVN: r228168

        * dwarf2out.c (XCOFF_DEBUGGING_INFO): Default 0 definition.
        (HAVE_XCOFF_DWARF_EXTRAS): Default to 0 definition.
        (output_fde): Don't output length for debug_frame on AIX.
        (output_call_frame_info): Don't output length for debug_frame on AIX.
        (have_macinfo): Force to False for XCOFF_DEBUGGING_INFO and not
        HAVE_XCOFF_DWARF_EXTRAS.
        (add_AT_loc_list): Return early if XCOFF_DEBUGGING_INFO and not
        HAVE_XCOFF_DWARF_EXTRAS.
        (output_compilation_unit_header): Don't output length on AIX.
        (output_pubnames): Don't output length on AIX.
        (output_aranges): Delete argument. Compute length locally. Don't
        output length on AIX.
        (output_line_info): Don't output length on AIX.
        (dwarf2out_finish): Don't compute aranges_length.
        * dwarf2asm.c (XCOFF_DEBUGGING_INFO): Default 0 definition.
        (dw2_asm_output_nstring): Emit .byte not .ascii on AIX.
        * config/rs6000/rs6000.c (rs6000_output_dwarf_dtprel): Emit correct
        symbol decoration for AIX.
        (rs6000_xcoff_debug_unwind_info): New.
        (rs6000_xcoff_asm_named_section): Emit .dwsect pseudo-op
        for SECTION_DEBUG.
        (rs6000_xcoff_declare_function_name): Emit different
        .function pseudo-op when DWARF2_DEBUG. Don't call
        xcoffout_declare_function for DWARF2_DEBUG.
        * config/rs6000/xcoff.h (TARGET_DEBUG_UNWIND_INFO):
        Redefine.
        * config/rs6000/aix71.h: New.
        * configure.ac (gcc_cv_as_aix_dwloc): Check AIX as for DWARF
        locations support.
        * configure: Regenerate.
        * config.gcc (powerpc-ibm-aix[789]+): New stanza for AIX 7.1+ with
        DWARF support.

From-SVN: r228167

	* config/arc/arc.c (arc_output_addsi): Fix left shift undefined
	behaviour.
	* config/arc/constraints.md (Cca, C2a): Fix left shift undefined
	behaviour.

From-SVN: r228166

    [PATCH] Fix undefined behaviour in SH port
	* config/sh/sh.h (CONST_OK_FOR_J16): Fix left shift undefined
	behaviour

From-SVN: r228165

[PATCH] Fix undefined behaviour in mips port
	* config/mips/mips.c (mips_compute_frame_info): Fix left shift
	undefined behaviour.

From-SVN: r228164

[PATCH] Fix undefined behaviour in cris port
	* config/cris/cris.md (asrandb): Fix left shift undefined
	behaviour.
	(asrandw): Likewise.

From-SVN: r228163

From-SVN: r228161

2015-09-25  Steven G. Kargl  <kargl@gcc.gnu.org>

	PR fortran/67614
	* resolve.c (gfc_resolve_code): Prevent ICE for invalid EXPR_NULL.

2015-09-25  Steven G. Kargl  <kargl@gcc.gnu.org>

	PR fortran/67614
	* gfortran.dg/pr67614.f90: New test.

From-SVN: r228156

2015-09-25  Steven G. Kargl  <kargl@gcc.gnu.org>

	PR fortran/67525
	* parse.c (match_deferred_characteristics): Remove an assert, which
	allows an invalid SELECT TYPE selector to be detected.

 
2015-09-25  Steven G. Kargl  <kargl@gcc.gnu.org>

	PR fortran/67525
	* gfortran.dg/pr67525.f90: New test.

From-SVN: r228155

From-SVN: r228154

2015-09-25  Vladimir Makarov  <vmakarov@redhat.com>

	PR target/61578
	* lra-constarints.c (match_reload): Check presence of the input pseudo
	in the output pseudo.

From-SVN: r228153

gcc/testsuite/
	PR fortran/55603
	* gfortran.dg/allocatable_function_9.f90: New.

From-SVN: r228151

2015-09-25  Tobias Burnus  <burnus@net-b.de>

	* doc/invoke.texi (-fsanitize): Minor wording tweak.

From-SVN: r228148

2015-09-25  Tobias Burnus  <burnus@net-b.de>

        * doc/invoke.texi (-fsanitize): Update URLs.

From-SVN: r228144

From-SVN: r228138

From-SVN: r228137

This patch unsets -freorder-blocks-and-partition when -fprofile-use
is not specified. Function splitting was not actually being performed
in that case, as probably_never_executed_bb_p does not distinguish
any basic blocks as being cold vs hot when there is no profile data.
Leaving it enabled, however, causes the assembly code generator to create
(empty) cold sections and labels, leading to unnecessary size overhead.

2015-09-25  Teresa Johnson  <tejohnson@google.com>

	* opts.c (finish_options): Unset -freorder-blocks-and-partition
	if not using profile.

From-SVN: r228136

for tuple constructors that construct from other tuples.

2015-09-25  Ville Voutilainen  <ville.voutilainen@gmail.com>

	Avoid creating dangling references in case of nested tuples
	for tuple constructors that construct from other tuples.
	* include/std/tuple (_TC::_NonNestedTuple): New.
	* include/std/tuple (tuple::_TNTC): New.
	* include/std/tuple (tuple(const tuple<_UElements...>&),
	tuple(tuple<_UElements...>&&): Use _TNTC.
	* testsuite/20_util/tuple/cons/nested_tuple_construct.cc: New.

From-SVN: r228134

Fortran passes NULL where a non-null string is expected by the pretty-printer,
which causes a sanitizer warning. This could have been found earlier by using
gcc_checking_assert. Even if the assertion is false, the result is just an
incomplete diagnostic, thus it seems more user-friendly to assert only when
checking. I do not have any idea how to properly fix the Fortran bug, thus this
patch simply works-around it.

gcc/fortran/ChangeLog:

2015-09-25  Manuel López-Ibáñez  <manu@gcc.gnu.org>

	PR pretty-print/67567
	* resolve.c (resolve_fl_procedure): Work-around when iface->module
	== NULL.

gcc/ChangeLog:

2015-09-25  Manuel López-Ibáñez  <manu@gcc.gnu.org>

	PR pretty-print/67567
	* pretty-print.c (pp_string): Add gcc_checking_assert.
	* pretty-print.h (output_buffer_append_r): Likewise.

From-SVN: r228131

gcc/
	PR target/67675
	* config/sh/sh-mem.cc (sh_expand_cmpstr): Check alignment of addr1 and
	addr2 individually.  Don't emit logical or insn if one is known to
	be aligned approriately.
	(sh_expand_cmpnstr): Likewise.

gcc/testsuite/
	PR target/67675
	* gcc.target/sh/pr67675.c: New.

From-SVN: r228118

The testcase triggered an ICE because the builtin expansion
code passed the output of expand_normal directly to the SET_FP[SC]R
generator, without forcing it into a register first.

gcc/
	* config/aarch64/aarch64-builtins.c (aarch64_expand_builtin): Force
	__builtin_aarch64_fp[sc]r arguments into a register.

gcc/testsuite/
	* gcc.target/aarch64/fpcr_fpsr_1.c: New file.

From-SVN: r228116

IA MCU processor name is lakemont, not lakemount.

gcc/

	* config.gcc (x86_archs): Replace lakemount with lakemont.
	(with_cpu): Likewise.
	(with_arch): Likewise.
	* config/i386/i386-c.c (ix86_target_macros_internal): Replace
	PROCESSOR_LAKEMOUNT with PROCESSOR_LAKEMONT.  Replace
	__tune_lakemount__ with __tune_lakemont__.
	* config/i386/i386.c (lakemount_cost): Renamed to ...
	(lakemont_cost): This.
	(m_LAKEMOUNT): Renamed to ...
	(m_LAKEMONT): This.
	(initial_ix86_arch_features): Replace m_LAKEMOUNT with m_LAKEMONT.
	(processor_target_table): Replace "lakemount" with "lakemont".
	(processor_alias_table): Likewise.
	(ix86_issue_rate): Replace PROCESSOR_LAKEMOUNT with
	PROCESSOR_LAKEMONT.
	(ix86_adjust_cost): Likewise.
	(ia32_multipass_dfa_lookahead): Likewise.
	* config/i386/i386.h (processor_type): Likewise.
	* config/i386/x86-tune.def: Replace m_LAKEMOUNT with m_LAKEMONT.
	* doc/invoke.texi: Replace lakemount with lakemont.  Replace
	Lakemount with Lakemont.

gcc/testsuite/

	* gcc.target/i386/pr66749.c (dg-options): Replace
	-mtune=lakemount with -mtune=lakemont.
	* gcc.target/i386/pr66821.c (dg-options): Likewise.
	* gcc.target/i386/pr67329.c (dg-options): Likewise.

From-SVN: r228115

	* c-ubsan.c (ubsan_instrument_division): Remove unnecessary code.
	(ubsan_instrument_shift): Likewise.

	* c-c++-common/ubsan/bounds-11.c: New test.
	* c-c++-common/ubsan/bounds-12.c: New test.

From-SVN: r228114

re PR sanitizer/64906 (-fsanitize=integer-divide-by-zero creates false -Wmaybe-uninitialized warning)

	PR sanitizer/64906
	* c-ubsan.c (ubsan_instrument_division): Also pre-evaluate OP1.

	* c-c++-common/ubsan/pr64906.c: New test.

From-SVN: r228112

The first IA MCU processor will be Lakemount.  This patch changes IA MCU
processor name from iamcu to lakemount.

gcc/

	* config.gcc (x86_archs): Replace iamcu with lakemount.
	(with_cpu): Likewise.
	(with_arch): Likewise.
	* doc/invoke.texi: Likewise.
	* config/i386/i386-c.c (ix86_target_macros_internal): Replace
	PROCESSOR_IAMCU with PROCESSOR_LAKEMOUNT.  Replace
	__tune_iamcu__ with __tune_lakemount__.
	* config/i386/i386.c (iamcu_cost): Renamed to ...
	(lakemount_cost): This.
	(m_IAMCU): Renamed to ...
	(m_LAKEMOUNT): This.
	(initial_ix86_arch_features): Replace m_IAMCU with m_LAKEMOUNT.
	(processor_target_table): Replace "iamcu" with "lakemount".
	(processor_alias_table): Likewise.
	(ix86_issue_rate): Replace PROCESSOR_IAMCU with
	PROCESSOR_LAKEMOUNT.
	(ix86_adjust_cost): Likewise.
	(ia32_multipass_dfa_lookahead): Likewise.
	* config/i386/i386.h (processor_type): Likewise.
	* config/i386/x86-tune.def: Replace m_IAMCU with m_LAKEMOUNT.

gcc/testsuite/

	* gcc.target/i386/pr66749.c (dg-options): Replace -mtune=iamcu
	with -mtune=lakemount.
	* gcc.target/i386/pr66821.c (dg-options): Likewise.
	* gcc.target/i386/pr67329.c (dg-options): Likewise.

From-SVN: r228109

From-SVN: r228108

	* config/pa/pa-linux.h (HAVE_sync_compare_and_swapdi): Define.
	* config/pa/pa-protos.h (pa_maybe_emit_compare_and_swap_exchange_loop):
	Declare.
	* config/pa/pa.c (pa_init_libfuncs): Init sync libfuncs up to 8 bytes.
	(pa_expand_compare_and_swap_loop): New.
	(pa_maybe_emit_compare_and_swap_exchange_loop): New.
	* config/pa/pa.md (atomic_storeqi, atomic_storehi, atomic_storesi,
	atomic_storesf, atomic_loaddf, atomic_storedf): New expanders.
	(atomic_loaddf_1, atomic_storedf_1): New insn patterns.
	(atomic_loaddi, atomic_loaddi_1, atomic_storedi, atomic_storedi_1):
	Revise.

From-SVN: r228104

re PR other/57195 (Mode attributes with specific mode iterator can not be used as mode iterators in *.md files)

2015-09-24  Michael Collison  <michael.collison@linaro.org>

	PR other/57195
	* read-md.c (read_name): Allow mode iterators inside angle
	brackets in rtl expressions.

From-SVN: r228102

2015-09-24  Vladimir Makarov  <vmakarov@redhat.com>

	PR target/61578
	* ira-color.c (update_allocno_cost): Add parameter.
	(update_costs_from_allocno): Decrease conflict cost.  Pass the new
	parameter.

From-SVN: r228097

Actually, I was trying to reject non-warning options as argument to
-Werror=. However, the new test fails because -fdiagnostics-color=never is
always placed by the driver after the warning options when calling the compiler
proper. This patch prunes all -fdiagnostics-color from the command-line but the
last one, which is moved to the first position.

gcc/ChangeLog:

2015-09-24  Manuel López-Ibáñez  <manu@gcc.gnu.org>

	PR driver/67640
	* opts-common.c (prune_options): Discard all -fdiagnostics-color
	but the last one, which is moved to the front to be processed
	first.
	* opts.c (enable_warning_as_error): Reject options that do not
	control warnings.

gcc/testsuite/ChangeLog:

2015-09-24  Manuel López-Ibáñez  <manu@gcc.gnu.org>

	PR driver/67640
	* gcc.dg/Werror-13.c: New test.

From-SVN: r228094

2015-09-24  Jiong Wang  <jiong.wang@arm.com>

	* config/aarch64/aarch64.c (aarch64_print_operand): Add "CONST" support.

From-SVN: r228093

2015-09-24  Jiong Wang  <jiong.wang@arm.com>

	* config/aarch64/aarch64-protos.h (aarch64_symbol_context): Delete.
	* config/aarch64/aarch64.c (aarch64_expand_mov_immediate): Likewise.
	(aarch64_cannot_force_const_mem): Likewise.
	(aarch64_classify_address): Likewise.
	(aarch64_classify_symbolic_expression): Likewise.
	(aarch64_print_operand): Likewise.
	(aarch64_classify_symbol): Likewise.
	(aarch64_mov_operand_p): Likewise.
	* config/aarch64/predicates.md (aarch64_valid_symref): Likewise.
	(aarch64_mov_operand): Likewise.

From-SVN: r228092

	PR libstdc++/67707
	* include/bits/stl_deque.h (_Deque_base::_M_move_impl): Initialize
	empty object.
	* testsuite/23_containers/deque/allocator/move.cc: Check moved-from
	deque.

From-SVN: r228090

gcc/testsuite/ChangeLog:

	* gcc.target/aarch64/target_attr_10.c (foo): Use dg-message for note.

From-SVN: r228088

    
    Reviewed-on: https://go-review.googlesource.com/14922

From-SVN: r228087