We have been including this in libgcc, which means that we have to append
-lgcc even when using shared libgcc. In preparation for revision of libgcc
split this into an endfile.

gcc/
2019-06-25  Iain Sandoe  <iain@sandoe.co.uk>

	* config/rs6000/darwin.h (ENDFILE_SPEC): New.

libgcc/
2019-06-25  Iain Sandoe  <iain@sandoe.co.uk>

	* config.host: Add libef_ppc.a to the extra files for powerpc-darwin.
	* config/rs6000/t-darwin: (PPC_ENDFILE_SRC, PPC_ENDFILE_OBJS): New.
	Build objects for the out of line save/restore register functions
	so that they can be used for any supported Darwin version.
	* config/t-darwin: Default the build Darwin version to Darwin8
	(MacOS 10.4).

From-SVN: r272659

The source file rs6000.c has grown to unreasonable size and is being
split up into several smaller source files.  This should improve
compilation speed for building gcc.

This is the first of several patches to do this and moves most of the
prologue/epilogue code to a new source file.

Bootstrapped and tested on powerpc64le-unknown-linux-gnu and
powerpc64-unknown-linux-gnu with no regressions.  Is this ok for trunk?


2019-06-24  Bill Seurer  <seurer@linux.vnet.ibm.com>

	* config/rs6000/rs6000.c (stack_info, rs6000_pic_labelno,
	savres_routine_syms, savres_routine_name, morestack_ref,
	rs6000_init_machine_status, save_reg_p, first_reg_to_save,
	first_fp_reg_to_save, first_altivec_reg_to_save, compute_vrsave_mask,
	compute_save_world_info, is_altivec_return_reg, fixed_reg_p,
	rs6000_savres_strategy, rs6000_stack_info, debug_stack_info,
	rs6000_return_addr, rs6000_decl_ok_for_sibcall,
	rs6000_function_ok_for_sibcall, rs6000_ra_ever_killed,
	rs6000_emit_load_toc_table, rs6000_emit_eh_reg_restore, uses_TOC,
	create_TOC_reference, rs6000_aix_asm_output_dwarf_table_ref,
	rs6000_emit_stack_tie, rs6000_emit_allocate_stack_1,
	get_stack_clash_protection_probe_interval,
	get_stack_clash_protection_guard_size,
	rs6000_emit_probe_stack_range_stack_clash, rs6000_emit_allocate_stack,
	rs6000_emit_probe_stack_range, output_probe_stack_range_1,
	interesting_frame_related_regno, output_probe_stack_range_stack_clash,
	output_probe_stack_range, rs6000_frame_related, generate_set_vrsave,
	gen_frame_set, gen_frame_load, gen_frame_store, emit_frame_save,
	gen_frame_mem_offset, rs6000_savres_routine_name,
	rs6000_savres_routine_sym, rs6000_emit_stack_reset,
	ptr_regno_for_savres, rs6000_emit_savres_rtx,
	rs6000_emit_prologue_move_from_cr, split_stack_arg_pointer_used_p,
	rs6000_global_entry_point_prologue_needed_p,
	rs6000_get_separate_components, rs6000_components_for_bb,
	rs6000_disqualify_components, rs6000_emit_prologue_components,
	rs6000_emit_epilogue_components, rs6000_set_handled_components,
	emit_vrsave_prologue, emit_split_stack_prologue, rs6000_emit_prologue,
	rs6000_output_savres_externs, rs6000_output_function_prologue,
	rs6000_keep_leaf_when_profiled, load_cr_save, restore_saved_cr,
	load_lr_save, restore_saved_lr, add_crlr_cfa_restore,
	offset_below_red_zone_p, emit_cfa_restores, rs6000_emit_epilogue,
	rs6000_output_function_epilogue, gen_add3_const,
	rs6000_expand_split_stack_prologue, rs6000_live_on_entry,
	rs6000_split_stack_space_check, rs6000_save_toc_in_prologue_p): Moved
	to rs6000-logue.c.
	(machine_function): Moved to rs6000.h.
	(rs6000_stack_t, ALTIVEC_REG_BIT, quad_address_offset_p) Moved to
	rs6000-internal.h.
	* config/rs6000/rs6000-logue.c(stack_info, rs6000_pic_labelno,
	savres_routine_syms, savres_routine_name, morestack_ref,
	rs6000_init_machine_status, save_reg_p, first_reg_to_save,
	first_fp_reg_to_save, first_altivec_reg_to_save, compute_vrsave_mask,
	compute_save_world_info, is_altivec_return_reg, fixed_reg_p,
	rs6000_savres_strategy, rs6000_stack_info, debug_stack_info,
	rs6000_return_addr, rs6000_decl_ok_for_sibcall,
	rs6000_function_ok_for_sibcall, rs6000_ra_ever_killed,
	rs6000_emit_load_toc_table, rs6000_emit_eh_reg_restore, uses_TOC,
	create_TOC_reference, rs6000_aix_asm_output_dwarf_table_ref,
	rs6000_emit_stack_tie, rs6000_emit_allocate_stack_1,
	get_stack_clash_protection_probe_interval,
	get_stack_clash_protection_guard_size,
	rs6000_emit_probe_stack_range_stack_clash, rs6000_emit_allocate_stack,
	rs6000_emit_probe_stack_range, output_probe_stack_range_1,
	interesting_frame_related_regno, output_probe_stack_range_stack_clash,
	output_probe_stack_range, rs6000_frame_related, generate_set_vrsave,
	gen_frame_set, gen_frame_load, gen_frame_store, emit_frame_save,
	gen_frame_mem_offset, rs6000_savres_routine_name,
	rs6000_savres_routine_sym, rs6000_emit_stack_reset,
	ptr_regno_for_savres, rs6000_emit_savres_rtx,
	rs6000_emit_prologue_move_from_cr, split_stack_arg_pointer_used_p,
	rs6000_global_entry_point_prologue_needed_p,
	rs6000_get_separate_components, rs6000_components_for_bb,
	rs6000_disqualify_components, rs6000_emit_prologue_components,
	rs6000_emit_epilogue_components, rs6000_set_handled_components,
	emit_vrsave_prologue, emit_split_stack_prologue, rs6000_emit_prologue,
	rs6000_output_savres_externs, rs6000_output_function_prologue,
	rs6000_keep_leaf_when_profiled, load_cr_save, restore_saved_cr,
	load_lr_save, restore_saved_lr, add_crlr_cfa_restore,
	offset_below_red_zone_p, emit_cfa_restores, rs6000_emit_epilogue,
	rs6000_output_function_epilogue, gen_add3_const,
	rs6000_expand_split_stack_prologue, rs6000_live_on_entry,
	rs6000_split_stack_space_check, rs6000_save_toc_in_prologue_p): Moved
	to here from rs6000.c.
	* config/rs6000/rs6000.h (machine_function): Moved to here from rs6000.c.
	* config/rs6000/rs6000-internal.h: (rs6000_stack_t, ALTIVEC_REG_BIT,
	quad_address_offset_p) Moved to here from rs6000.c.
	* config/rs6000/t-rs6000: Add new source file rs6000-logue.c.
	* config/config.gcc: Add new source file rs6000-logue.c to garbage
	collector.

From-SVN: r272658

	* class.c (resolves_to_fixed_type_p): Check CLASSTYPE_FINAL.

If we have a pointer to final class, we know the dynamic type of the object
must be that class, because it can't have any derived classes.

From-SVN: r272656

2019-06-25  Martin Liska  <mliska@suse.cz>

	* hash-table.c (hashtab_chk_error): Move here from ...
	* hash-table.h (hashtab_chk_error): ... here.

From-SVN: r272655

re PR c++/90969 (ICE: tree check: expected array_type, have vector_type in array_ref_low_bound, at tree.c:13570)

	PR c++/90969
	* constexpr.c (cxx_eval_array_reference): Don't look through VCE from
	vector type if lval.

	* g++.dg/ext/vector38.C: New test.

From-SVN: r272654

Although libstdc++ adds 'constexpr' to its std::abs(floating-point)
overloads (as a non-conforming extension), those overloads are not used
if the target libc provides them, which is the case on Solaris.

The fix is to avoid std::abs and simply apply the negation when needed.

	* include/std/numeric (midpoint(T, T)): Avoid std::abs in constexpr
	function.

From-SVN: r272653

2019-06-25  Martin Liska  <mliska@suse.cz>

	contrib/filter-clang-warnings.py: Transform from
	filter-rtags-warnings.py.

From-SVN: r272652

2019-06-25  Martin Liska  <mliska@suse.cz>

	PR tree-optimization/90978
	* df-scan.c (df_update_entry_block_defs): Remove dead else
	branch.
	(df_update_exit_block_uses): Likewise.

From-SVN: r272651

2019-06-25  Martin Liska  <mliska@suse.cz>

	* libgcov-driver-system.c (replace_filename_variables): Do not
	call strlen with NULL argument.

From-SVN: r272650

2019-06-25  Kwok Cheung Yeung  <kcy@codesourcery.com>
            Andrew Stubbs  <ams@codesourcery.com>

	libgfortran/
	* configure: Regenerate.
	* configure.ac (LIBGFOR_MINIMAL): Do not use on AMD GCN.

Co-Authored-By: Andrew Stubbs <ams@codesourcery.com>

From-SVN: r272649

2019-06-25  Andrew Stubbs  <ams@codesourcery.com>

	libgcc/
	* config/gcn/t-amdgcn (LIB2ADD): Add unwind-gcn.c.
	* config/gcn/unwind-gcn.c: New file.

From-SVN: r272648

2019-06-25  Kwok Cheung Yeung  <kcy@codesourcery.com>
            Andrew Stubbs  <ams@codesourcery.com>

        gcc/
	* config.gcc (thread_file): Set to gcn for AMD GCN.
	* config/gcn/gcn.c (gcn_emutls_var_init): New function.
	(TARGET_EMUTLS_VAR_INIT): New hook.

	config/
	* gthr.m4 (GCC_AC_THREAD_HEADER): Add case for gcn.

	libgcc/
	* configure: Regenerate.
	* config/gcn/gthr-gcn.h: New.

Co-Authored-By: Andrew Stubbs <ams@codesourcery.com>

From-SVN: r272647

2019-06-25  Martin Jambor  <mjambor@suse.cz>

	PR ipa/90939
	* ipa-cp.c (ipcp_bits_lattice::meet_with): Remove assert.

	testsuite/
	* g++.dg/lto/pr90939_[01].C: New test.

From-SVN: r272646

2019-06-25  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/90930
	* tree-ssa-reassoc.c (reassociate_bb): Only rewrite expression
	into parallel form in the last pass instance.

	* gcc.dg/tree-ssa/reassoc-24.c: Adjust.
	* gcc.dg/tree-ssa/reassoc-25.c: Likewise.

From-SVN: r272644

gcc/
xxxx-xx-xx  Claudiu Zissulescu  <claziss@synopsys.com>

	* config/arc/arc.c (arc_symbol_binds_local_p): New function.
	(arc_legitimize_pic_address): Simplify and cleanup the function.
	(SYMBOLIC_CONST): Remove.
	(prepare_pic_move): Likewise.
	(prepare_move_operands): Handle complex mov cases here.
	(arc_legitimize_address_0): Remove call to
	arc_legitimize_pic_address.
	(arc_legitimize_address): Remove call to
	arc_legitimize_tls_address.
	* config/arc/arc.md (movqi_insn): Allow Cm3 match.
	(movhi_insn): Likewise.

/gcc/testsuite
xxxx-xx-xx  Claudiu Zissulescu  <claziss@synopsys.com>

	* gcc.target/arc/pr89838.c: New file.

From-SVN: r272643

gcc/ChangeLog:

	* gcc/c-family/c-common.c (c_common_nodes_and_builtins): Define
	alternate "__intN__" name for "__intN" types.
	* gcc/c/c-parser.c (c_parse_init): Create keyword for "__intN__" type.
	* gcc/cp/lex.c (init_reswords): Likewise.
	* gcc/config/msp430/msp430.h: Use __int20__ for SIZE_TYPE and
	PTRDIFF_TYPE.
	* gcc/cp/cp-tree.h (cp_decl_specifier_seq): New bitfield "int_n_alt".
	* gcc/c/c-decl.c (declspecs_add_type): Don't pedwarn about "__intN" ISO
	C incompatibility if alternate "__intN__" form is used.
	* gcc/cp/decl.c (grokdeclarator): Likewise.
	* gcc/cp/parser.c (cp_parser_simple_type_specifier): Set
	decl_specs->int_n_alt if "__intN__" form is used.
	* gcc/gimple-ssa-sprintf.c (build_intmax_type_nodes): Accept "__intN__"
	format of "__intN" types for UINTMAX_TYPE.
	* gcc/brig/brig-lang.c (brig_build_c_type_nodes): Accept "__intN__"
	format of "__intN" types for SIZE_TYPE.
	* gcc/lto/lto-lang.c (lto_build_c_type_nodes): Likewise.
	* gcc/stor-layout.c (initialize_sizetypes): Accept "__intN__"
	format of "__intN" types for SIZETYPE.
	* gcc/tree.c (build_common_tree_nodes): Accept "__intN__"
	format of "__intN" types for SIZE_TYPE and PTRDIFF_TYPE.
	* gcc/doc/invoke.texi: Document that __intN__ disables pedantic
	warnings.

gcc/testsuite/ChangeLog:

	* gcc.target/msp430/mlarge-pedwarns.c: New test.

From-SVN: r272640

tree-ssa-alias.c (indirect_ref_may_alias_decl_p): Check that base2_alias_set is non-zero before doing TBAA based disambiguation.

	* tree-ssa-alias.c (indirect_ref_may_alias_decl_p): Check that
	base2_alias_set is non-zero before doing TBAA based disambiguation.

From-SVN: r272639

2019-06-25  Martin Liska  <mliska@suse.cz>

	PR tree-optimization/90973
	* tree-vect-loop.c (vect_get_known_peeling_cost): Sum retval
	of prologue and epilogue.

From-SVN: r272638

	* gcc-interface/decl.c (gnat_to_gnu_entity): Remove superfluous test
	in previous change.
	* gcc-interface/gigi.h (maybe_character_type): Fix formatting.
	(maybe_character_value): Likewise.

From-SVN: r272637

	PR sanitizer/90954
	* c-omp.c (c_finish_omp_atomic): Allow tree_invariant_p in addition
	to SAVE_EXPR in first operand of a COMPOUND_EXPR.

	* c-c++-common/gomp/pr90954.c: New test.

From-SVN: r272635

	* include/pstl/pstl_config.h (_PSTL_PRAGMA_SIMD_SCAN,
	_PSTL_PRAGMA_SIMD_INCLUSIVE_SCAN, _PSTL_PRAGMA_SIMD_EXCLUSIVE_SCAN):
	Define to OpenMP 5.0 pragmas even for GCC 10.0+.
	(_PSTL_UDS_PRESENT): Define to 1 for GCC 10.0+.

From-SVN: r272634

    
    They are wrappers of libc functions that use no stack. Mark them
    nosplit so the linker won't patch it to call __morestack_non_split.
    
    Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/183629

From-SVN: r272633

From-SVN: r272632

	* ipa-utils.h (type_with_linkage_p): Verify that type is
	CXX_ODR_P.
	(odr_type_p): Remove extra return.
	* lto-streamer-out.c (hash_tree): Hash TYPE_CXX_ODR_P;
	hash STRING_FLAG only for arrays and integers.
	* tree-stremaer-in.c (unpack_ts_type_common_value_fields):
	Update analogously.
	* tree-streamer-out.c (pack_ts_type_common_value_fields):
	Likewise.
	* print-tree.c (print_node): Print cxx-odr-p
	and string-flag.
	* tree.c (need_assembler_name_p): Also check that type
	is CXX_ODR_TYPE_P
	(verify_type_variant): Update verification of SRING_FLAG;
	also check CXX_ODR_P.
	* tree.h (ARRAY_OR_INTEGER_TYPE_CHECK): New macro.
	(TYPE_STRING_FLAG): Use it.
	(TYPE_CXX_ODR_P): New macro.

	* lto-common.c (compare_tree_sccs_1): Compare CXX_ODR_P;
	compare STRING_FLAG only for arrays and integers.

	* gcc-interface/decl.c (gnat_to_gnu_entity): Check that
	type is array or integer prior checking string flag.
	* gcc-interface/gigi.h (gnat_signed_type_for,
	maybe_character_value): Likewise.

	* c-common.c (braced_lists_to_strings): Check that
	type is array or integer prior checking string flag.

	* lex.c (cxx_make_type): Set TYPE_CXX_ODR_P.

	* dwarf2out.c (gen_array_type_die): First check that type
	is an array and then test string flag.

	* trans-expr.c (gfc_conv_substring): Check that
	type is array or integer prior checking string flag.
	(gfc_conv_string_parameter): Likewise.
	* trans-openmp.c (gfc_omp_scalar_p): Likewise.
	* trans.c (gfc_build_array_ref): Likewise.

From-SVN: r272628

The -mno-speculate-indirect-jumps functionality is not implemented for
Darwin and, given that it's deprecated, is unlikely to be.

2019-06-24  Iain Sandoe  <iain@sandoe.co.uk>

	* gcc.target/powerpc/safe-indirect-jump-1.c: Skip for Darwin.
	* gcc.target/powerpc/safe-indirect-jump-7.c: Likewise.

From-SVN: r272627

We just needed to adjust the regex to accept Darwin's register names.

2019-06-24  Iain Sandoe  <iain@sandoe.co.uk>

	* gcc.target/powerpc/spec-barr-1.c: Adjust scan assembler regex
	to recognise Darwin's register names.

From-SVN: r272626

For the test to succeed there needs to be some header that is to be found in
the 'expected' place i.e. <sysroot>/usr/include/.  It's important that it is
not the name of a header for which fixincludes have been applied, since such
headers will be found in the gcc include-fixed dir and, in general, reference
additional headers.  The dummy sysroot will prevent the additional headers
from being found, resulting in a failed test.  The fix is to use a header name
that isn't expected to be present in a real sysroot.

2019-06-24  Iain Sandoe  <iain@sandoe.co.uk>

	* gcc.dg/cpp/isysroot-1.c (main): Use <example.h> as the test header.
	* gcc.dg/cpp/usr/include/stdio.h: Rename...
	* gcc.dg/cpp/usr/include/example.h: ... to this.

From-SVN: r272625

    
    Open code string equality with builtin memcmp. This allows
    further optimizations in the backend.
    
    Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/183538

From-SVN: r272624

2019-06-24  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/90972
	* tree-vect-stmts.c (vect_init_vector): Handle CONSTANT_CLASS_P
	in common code, dealing with STRING_CST properly.

	* gcc.dg/torture/pr90972.c: New testcase.

From-SVN: r272623

2019-06-24  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/90930
	PR tree-optimization/90316
	* tree-ssa-alias.c (walk_non_aliased_vuses): Add missing
	decrement of limit.

From-SVN: r272621

    
    Instead of going through a C function __go_memcmp, we can just
    use __builtin_memcmp directly. This allows more optimizations in
    the compiler backend.
    
    Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/183537

From-SVN: r272620

gcc/ada/ChangeLog:

	* gcc-interface/utils.c (handle_nonnull_attribute): Quote attribute
	name.

gcc/c/ChangeLog:

	* c-typeck.c (build_binary_op): Hyphenate floating-point.

gcc/testsuite/ChangeLog:

	* gcc.dg/Wfloat-equal-1.c: Adjust text of expected diagnostic.
	* gcc.dg/misc-column.c: Ditto.

gcc/ChangeLog:

	* tree-pretty-print.h: Remove unnecessary punctuation characters
	from a diagnostic.
	* tree-ssa.c (release_defs_bitset): Correct preprocessor conditional.

From-SVN: r272619

	* class.c (layout_class_type): Don't use a separate
	CLASSTYPE_AS_BASE if it's the same size.

From-SVN: r272618

	* include/std/numeric (midpoint(T, T)): Change implementation for
	floating-point types to avoid incorrect rounding of denormals.
	* testsuite/26_numerics/midpoint/floating.cc: Add check for correct
	rounding with denormals.
	* testsuite/26_numerics/gcd/gcd_neg.cc: Adjust dg-error line numbers.
	* testsuite/26_numerics/lcm/lcm_neg.cc: Likewise.

From-SVN: r272616

	* testsuite/18_support/headers/cfloat/values_c++17.cc: New test.

From-SVN: r272615

From-SVN: r272613

    
    GCC recently introduced -Wformat-diag to scrutinize GCC error messages.
    It reports a number of warnings about gofrontend code, such as:
    
    ../../trunk/gcc/go/gofrontend/import.cc: In member function ‘Type* Import::type_for_index(int, const string&, size_t, bool*)’:
    ../../trunk/gcc/go/gofrontend/import.cc:1129:48: warning: unquoted operator ‘>=’ in format [-Wformat-diag]
     1129 |         "error in %s at %lu: bad type index %d >= %d",
          |                                                ^~
    
    ../../trunk/gcc/go/gofrontend/ast-dump.cc: In member function ‘void Ast_dump_context::dump(Gogo*, const char*)’:
    ../../trunk/gcc/go/gofrontend/ast-dump.cc:203:25: warning: unquoted option name ‘-fgo-dump-ast’ in format [-Wformat-diag]
      203 |     "cannot open %s:%m, -fgo-dump-ast ignored", dumpname.c_str());
          |                         ^~~~~~~~~~~~~
    
    ../../trunk/gcc/go/gofrontend/expressions.cc: In static member function ‘static Bexpression* Func_expression::get_code_pointer(Gogo*, Named_object*, Location)’:
    ../../trunk/gcc/go/gofrontend/expressions.cc:1350:29: warning: misspelled term ‘builtin function’ in format; use ‘built-in function’ instead [-Wformat-diag]
     1350 |     "invalid use of special builtin function %qs; must be called",
          |                             ^~~~~~~~~~~~~~~~
    
    ../../trunk/gcc/go/gofrontend/gogo.cc: In member function ‘void Gogo::add_linkname(const string&, bool, const string&, Location)’:
    ../../trunk/gcc/go/gofrontend/gogo.cc:2527:4: warning: unquoted sequence of 2 consecutive punctuation characters ‘//’ in format [-Wformat-diag]
     2527 |   ("%s is not a function; "
          |   ~^~~~~~~~~~~~~~~~~~~~~~~~
     2528 |    "//go:linkname is only supported for functions"),
          |    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    
    This CL edits error messages to avoid these warnings.
    
    Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/183497

	* go.test/test/blank1.go: Update for diagnostic message changes.

From-SVN: r272608

    
    GCC recently added a new warning -Wformat-diag which does a lot of
    rigorous checks on GCC diagnostic messages.  This produces a number of
    unnecessary diagnostics on gofrontend diagnostic output, such as
    
    ../../trunk/gcc/go/gofrontend/escape.cc: In member function ‘virtual int Escape_analysis_assign::statement(Block*, size_t*, Statement*)’:
    ../../trunk/gcc/go/gofrontend/escape.cc:1336:33: warning: spurious leading punctuation sequence ‘[’ in format [-Wformat-diag]
     1336 |       go_inform(s->location(), "[%d] %s esc: %s",
          |                                 ^
    
    ../../trunk/gcc/go/gofrontend/escape.cc: In member function ‘void Escape_analysis_assign::call(Call_expression*)’:
    ../../trunk/gcc/go/gofrontend/escape.cc:1964:17: warning: unquoted operator ‘::’ in format [-Wformat-diag]
     1964 |         "esccall:: indirect call <- %s, untracked",
          |                 ^~
    
    ../../trunk/gcc/go/gofrontend/escape.cc:1964:34: warning: unbalanced punctuation character ‘<’ in format [-Wformat-diag]
     1964 |         "esccall:: indirect call <- %s, untracked",
          |                                  ^
    
    Avoid these messages by adding a new function go_debug that uses only
    printf formatting, not GCC diagnostic formatting, and change all the
    optimization debugging messages to use it.  None of the debugging
    messages used the GCC diagnostic formatting specifiers anyhow.
    
    Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/183437

From-SVN: r272607

This cannot pass for current Darwin, since it requires VSX and we
don't have any hardware supporting that.  Add a dg-requires clause
for this.

2019-06-23  Iain Sandoe  <iain@sandoe.co.uk>

	* gcc.target/powerpc/builtins-2.c: Require VSX hardware support.

From-SVN: r272606

Darwin (unlike most of the members of the PowerPC port family)
defaults to signed chars, so the test was failing to compile with
a "mismatched parameters" error.

2019-06-23  Iain Sandoe  <iain@sandoe.co.uk>

	* gcc.target/powerpc/pr80125.c (foo): Use an unsigned char
	vector explicitly for the vec_perm.

From-SVN: r272605