2017-06-08  Olivier Hainque  <hainque@adacore.com>

        * config/t-vxworks (LIBGCC2_INCLUDES): Add path to wrn/coreip to
        the set of -I options, support for direct inclusions of net/uio.h
        by VxWorks header files via ioLib.h.

From-SVN: r249016

gcc/ChangeLog:

2017-05-09  Alexander Ivchenko  <aivchenk@gmail.com>

        * tree-chkp.c (chkp_get_hard_register_var_fake_base_address):
        New function.
        (chkp_get_hard_register_fake_addr_expr): Ditto.
        (chkp_build_addr_expr): Add check for hard reg case.
        (chkp_parse_array_and_component_ref): Ditto.
        (chkp_find_bounds_1): Ditto.
        (chkp_process_stmt): Don't generate bounds store for
        hard reg case.


gcc/testsuite/ChangeLog:

2017-05-09  Alexander Ivchenko  <aivchenk@gmail.com>

        * gcc.target/i386/mpx/hard-reg-2-lbv.c: New test.
        * gcc.target/i386/mpx/hard-reg-2-nov.c: New test.
        * gcc.target/i386/mpx/hard-reg-2-ubv.c: New test.

From-SVN: r249015

	* predict.c (maybe_hot_bb_p): Do not check profile status.
	(maybe_hot_edge_p): Likewise.
	(probably_never_executed): Check for zero counts even if profile
	is not read.
	(unlikely_executed_edge_p): New function.
	(unlikely_executed_stmt_p): New function.
	(unlikely_executed_bb_p): New function.
	(set_even_probabilities): Use unlikely predicates.
	(combine_predictions_for_bb): Likewise.
	(predict_paths_for_bb): Likewise.
	(predict_paths_leading_to_edge): Likewise.
	(determine_unlikely_bbs): New function.
	(estimate_bb_frequencies): Use it.
	(compute_function_frequency): Use zero counts even if profile is
	not read.
	* profile-count.h: Fix typo.

	* g++.dg/tree-ssa/counts-1.C: New testcase.
	* gcc.dg/tree-ssa/counts-1.c: New testcase.

From-SVN: r249013

gcc/
	* config/i386/avx512bwintrin.h (_mm512_mask_cvtepi16_storeu_epi8,
	_mm512_mask_cvtsepi16_storeu_epi8,
	_mm512_mask_cvtusepi16_storeu_epi8): New intrinsics.
	* config/i386/avx512vlbwintrin.h (_mm256_mask_cvtepi16_storeu_epi8,
	_mm_mask_cvtsepi16_storeu_epi8, _mm256_mask_cvtsepi16_storeu_epi8,
	_mm_mask_cvtusepi16_storeu_epi8, _mm256_mask_cvtusepi16_storeu_epi8,
	_mm_mask_cvtepi16_storeu_epi8): New intrinsics.
	* config/i386/i386-builtin-types.def (PV8Q, V8QI): New pointer type.
	(VOID_FTYPE_PV32QI_V32HI_USI, VOID_FTYPE_PV8QI_V8HI_UQI,
	VOID_FTYPE_PV16QI_V16HI_UHI): New function types.
	* config/i386/i386-builtin.def (__builtin_ia32_pmovwb128mem_mask,
	__builtin_ia32_pmovwb256mem_mask, __builtin_ia32_pmovswb128mem_mask,
	__builtin_ia32_pmovswb256mem_mask, __builtin_ia32_pmovuswb128mem_mask,
	__builtin_ia32_pmovuswb256mem_mask,
	__builtin_ia32_pmovuswb512mem_mask, __builtin_ia32_pmovswb512mem_mask)
	__builtin_ia32_pmovwb512mem_mask): New builtins.

gcc/testsuite/
	* gcc.target/i386/avx512bw-vpmovswb-1.c: Add new intrinsics to test.
	* gcc.target/i386/avx512bw-vpmovswb-2.c: Ditto.
	* gcc.target/i386/avx512bw-vpmovuswb-1.c: Ditto.
	* gcc.target/i386/avx512bw-vpmovuswb-2.c: Ditto.
	* gcc.target/i386/avx512bw-vpmovwb-1.c: Ditto.
	* gcc.target/i386/avx512bw-vpmovwb-2.c: Ditto.

From-SVN: r249012

re PR sanitizer/80932 (UBSAN: false positive as a result of distribution: c1*(c2*v1-c3*v2)=>c1*c2*v1-c1*c3*v2)

	PR sanitize/80932
	* c-c++-common/ubsan/pr80932.c: Test with ints, not with long ints.

From-SVN: r249010

PR target/73350,80862
gcc/
	* config/i386/subst.md (round): Fix round pattern.
	* config/i386/i386.c (ix86_erase_embedded_rounding):
	Fix erasing rounding for the fixed pattern.

gcc/testsuite/
	* gcc.target/i386/pr73350.c: New test.

From-SVN: r249009

From-SVN: r249008

2017-06-08  Olivier Hainque  <hainque@adacore.com>

        * vx_crtbegin_auto.c: Update year in copyright notice.
        * vx_crtbegin.c: Likewise.
        * vx_crtbegin.inc: Likewise. 
        * vx_crtend.c:  Likewise.

From-SVN: r249007

2017-06-08  Martin Liska  <mliska@suse.cz>

	PR gcov-profile/80911
	* gcov.c (block_info::block_info): New constructor.

From-SVN: r249006

2017-06-08  Tamar Christina  <tamar.christina@arm.com>

	PR middle-end/77925
	PR middle-end/77926
	PR middle-end/66462

	* gcc/builtins.c (fold_builtin_fpclassify): Remove.
	(fold_builtin_interclass_mathfn): Remove.
	(expand_builtin): Add builtins to lowering list.
	(fold_builtin_n): Remove fold_builtin_varargs.
	(fold_builtin_varargs): Remove.
	* gcc/builtins.def (BUILT_IN_ISZERO, BUILT_IN_ISSUBNORMAL): New.
	* gcc/real.h (get_min_float): New.
	(real_format): Add is_ieee_compatible field.
	* gcc/real.c (get_min_float): New.
	(ieee_single_format): Set is_ieee_compatible flag.
	* gcc/gimple-low.c (lower_stm): Define BUILT_IN_FPCLASSIFY,
	CASE_FLT_FN (BUILT_IN_ISINF), BUILT_IN_ISINFD32, BUILT_IN_ISINFD64,
	BUILT_IN_ISINFD128, BUILT_IN_ISNAND32, BUILT_IN_ISNAND64,
	BUILT_IN_ISNAND128, BUILT_IN_ISNAN, BUILT_IN_ISNORMAL, BUILT_IN_ISZERO,
	BUILT_IN_ISSUBNORMAL, CASE_FLT_FN (BUILT_IN_FINITE), BUILT_IN_FINITED32
	BUILT_IN_FINITED64, BUILT_IN_FINITED128, BUILT_IN_ISFINITE.
	(lower_builtin_fpclassify, is_nan, is_normal, is_infinity): New.
	(is_zero, is_subnormal, is_finite, use_ieee_int_mode): Likewise.
	(lower_builtin_isnan, lower_builtin_isinfinite): Likewise.
	(lower_builtin_isnormal, lower_builtin_iszero): Likewise.
	(lower_builtin_issubnormal, lower_builtin_isfinite): Likewise.
	(emit_tree_cond, get_num_as_int, emit_tree_and_return_var): New.
	(mips_single_format): Likewise.
	(motorola_single_format): Likewise.
	(spu_single_format): Likewise.
	(ieee_double_format): Likewise.
	(mips_double_format): Likewise.
	(motorola_double_format): Likewise.
	(ieee_extended_motorola_format): Likewise.
	(ieee_extended_intel_128_format): Likewise.
	(ieee_extended_intel_96_round_53_format): Likewise.
	(ibm_extended_format): Likewise.
	(mips_extended_format): Likewise.
	(ieee_quad_format): Likewise.
	(mips_quad_format): Likewise.
	(vax_f_format): Likewise.
	(vax_d_format): Likewise.
	(vax_g_format): Likewise.
	(decimal_single_format): Likewise.
	(decimal_quad_format): Likewise.
	(iee_half_format): Likewise.
	(mips_single_format): Likewise.
	(arm_half_format): Likewise.
	(real_internal_format): Likewise.
	* gcc/doc/extend.texi: Add documentation for built-ins.
	* gcc/c/c-typeck.c (convert_arguments): Add BUILT_IN_ISZERO
	and BUILT_IN_ISSUBNORMAL.

gcc/testsuite/
2017-06-08  Tamar Christina  <tamar.christina@arm.com>

	* gcc.target/aarch64/builtin-fpclassify.c: New codegen test.
	* gcc.dg/fold-notunord.c: Removed.
	* gcc.dg/torture/floatn-tg-4.h: Add tests for iszero and issubnormal.
	* gcc.dg/torture/float128-tg-4.c: Likewise.
	* gcc.dg/torture/float128x-tg-4: Likewise.
	* gcc.dg/torture/float16-tg-4.c: Likewise.
	* gcc.dg/torture/float32-tg-4.c: Likewise.
	* gcc.dg/torture/float32x-tg-4.c: Likewise.
	* gcc.dg/torture/float64-tg-4.c: Likewise.
	* gcc.dg/torture/float64x-tg-4.c: Likewise.
	* gcc.dg/pr28796-1.c: Add -O2.
	* gcc.dg/builtins-43.c: Check lower instead of gimple.
	* gcc.dg/tg-tests.h: Add iszero and issubnormal.
	* gcc.dg/pr77925.c: Add to test safe cases.

From-SVN: r249005

re PR tree-optimization/80928 (SLP vectorization does not handle induction in outer loop vectorization)

2017-06-08  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/80928
	* gcc.dg/vect/slp-perm-8.c: Do not expect check loop to be vectorized.

From-SVN: r249004

From-SVN: r249003

simple-object-xcoff.c (simple_object_xcoff_find_sections): Search symbol table for .go_export symbol and apply pfn if found.

2017-06-07  Tony Reix  <tony.reix@atos.net>
            Matthieu Sarter  <matthieu.sarter.external@atos.net>
            David Edelsohn  <dje.gcc@gmail.com>

        * simple-object-xcoff.c (simple_object_xcoff_find_sections):
        Search symbol table for .go_export symbol and apply pfn if found.

Co-Authored-By: David Edelsohn <dje.gcc@gmail.com>
Co-Authored-By: Matthieu Sarter <matthieu.sarter.external@atos.net>

From-SVN: r248999

gcc/ChangeLog:

2017-06-07  Carl Love  <cel@us.ibm.com>

	* config/rs6000/rs6000-c: The return type of the following
	built-in functions was implemented as int not long long.  Fix sign
	of return value for the unsigned version of vec_mulo and vec_mule.
	vector unsigned long long vec_bperm (vector unsigned long long,
	                                     vector unsigned char)
	vector signed long long vec_mule (vector signed int,
	                                  vector signed int)
	vector unsigned long long vec_mule (vector unsigned int,
	                                    vector unsigned int)
	vector signed long long vec_mulo (vector signed int,
	                                  vector signed int)
	vector unsigned long long vec_mulo (vector unsigned int,
	                                    vector unsigned int)
	* doc/extend.texi: Fix the documentation for the built-in
	functions.

gcc/testsuite/ChangeLog:

2017-06-07  Carl Love  <cel@us.ibm.com>
	* gcc.target/powerpc/builtins-3.c: Fix vec_mule, vec_mulo test cases.
---

From-SVN: r248998

re PR target/80982 (gcc.target/powerpc/builtins-3-runnable.c fails starting with its introduction in r248846)

gcc/ChangeLog:

2017-06-07  Carl Love  <cel@us.ibm.com>

	PR target/80982
	* config/rs6000/altivec.md (double<mode>2): Fix the implementation of
	for BE.

From-SVN: r248997

gcc/ChangeLog:

2017-06-07  Carl Love  <cel@us.ibm.com>

	* config/rs6000/altivec.md: Fix argument swizzle in vec_doublel
	support, Generate	doublehv for signed int/float for BE case only.

From-SVN: r248996

	* doc/invoke.texi (mcx16): Rewrite.

From-SVN: r248995

    
    Patch by Andreas Schwab.
    
    Reviewed-on: https://go-review.googlesource.com/45071

From-SVN: r248994

	* include/bits/regex.h (basic_regex): Add deduction guide from P0433.
	* testsuite/28_regex/basic_regex/ctors/deduction.cc: New.

From-SVN: r248990

	PR libstdc++/81002
	* include/bits/regex.h (basic_regex): Adjust call to __compile_nfa
	so iterator type is deduced.
	* include/bits/regex_compiler.h (__compile_nfa): Reorder template
	parameters to allow iterator type to be deduced.
	* testsuite/28_regex/basic_regex/ctors/basic/iter.cc: New.

From-SVN: r248989

From-SVN: r248988

Now rs6000_nonimmediate_operand is just nonimmediate_operand.


	* config/rs6000/predicates.md (rs6000_nonimmediate_operand): Delete.
	* config/rs6000/rs6000.md (*movsi_internal1, movsi_from_sf,
	*mov<mode>_softfloat, and an anonymous splitter): Use
	nonimmediate_operand instead of rs6000_nonimmediate_operand.

From-SVN: r248987

We can also remove the two other SPE registers.


	* config/rs6000/darwin.h (REGISTER_NAMES): Delete the SPE_ACC and
	SPEFSCR registers.
	* config/rs6000/rs6000.c (rs6000_reg_names, alt_reg_names): Ditto.
	(enum rs6000_reg_type): Delete SPE_ACC_TYPE and SPEFSCR_REG_TYPE.
	(rs6000_debug_reg_global): Adjust.
	(rs6000_init_hard_regno_mode_ok): Adjust.
	(rs6000_dbx_register_number): Adjust.
	* config/rs6000/rs6000.h (FIRST_PSEUDO_REGISTER): Change to 115.
	(FIXED_REGISTERS, CALL_USED_REGISTERS, CALL_REALLY_USED_REGISTERS):
	Remove SPE_ACC and SPEFSCR.
	(REG_ALLOC_ORDER): Ditto.
	(FRAME_POINTER_REGNUM): Change to 111.
	(enum reg_class): Remove the SPE_ACC and SPEFSCR registers.
	(REG_CLASS_NAMES): Ditto.
	(REG_CLASS_CONTENTS): Delete the SPE_ACC and SPEFSCR registers.
	(REGISTER_NAMES): Ditto.
	(ADDITIONAL_REG_NAMES): Ditto.
	(rs6000_reg_names): Ditto.
	* config/rs6000/rs6000.md: Renumber some register number
	define_constants.

From-SVN: r248986

	* config/rs6000/darwin.h (REGISTER_NAMES): Delete the SPE high
	registers.
	* config/rs6000/rs6000.c (rs6000_reg_names, alt_reg_names): Ditto.
	* config/rs6000/rs6000.h (FIRST_PSEUDO_REGISTER): Change from 149
	to 117.
	(DWARF_REG_TO_UNWIND_COLUMN): Do not define.
	(FIXED_REGISTERS, CALL_USED_REGISTERS, CALL_REALLY_USED_REGISTERS):
	Delete the SPE high registers.
	(REG_ALLOC_ORDER): Ditto.
	(enum reg_class): Remove SPE_HIGH_REGS.
	(REG_CLASS_NAMES): Ditto.
	(REG_CLASS_CONTENTS): Delete the SPE high registers.
	(REGISTER_NAMES): Ditto.
	(rs6000_reg_names): Ditto.
	* doc/tm.texi.in: Remove SPE as example.
	* doc/tm.texi: Regenerate.

From-SVN: r248985

Nothing uses it anymore.


	* config/rs6000/8540.md (ppc8540_brinc): Delete.
	* config/rs6000/e500mc.md (e500mc_brinc): Delete.
	* config/rs6000/e500mc64.md (e500mc64_brinc): Delete.
	* config/rs6000/rs6000.md (type): Remove "brinc".

From-SVN: r248984

	* config.gcc (powerpc*-*-*): Don't add spe.h to extra_headers.
	(powerpc*-linux*spe*): Use ${cpu_type} instead of rs6000.
	* config/rs6000/linuxspe.h: Delete file.
	* config/rs6000/rs6000.md: Don't include spe.md.
	* config/rs6000/spe.h: Delete file.
	* config/rs6000/spe.md: Delete file.
	* config/rs6000/t-rs6000: Remove spe.md.

From-SVN: r248983

	* config/rs6000/predicates.md (reg_or_mem_operand): Reformat.
	(reg_or_none500mem_operand): Delete.
	* config/rs6000/rs6000.md (extendsfdf2): Use reg_or_mem_operand
	instead of reg_or_none500mem_operand.

From-SVN: r248982

	* config/rs6000/rs6000.c (rs6000_option_override_internal): Delete
	handling of SPE flags.
	* config/rs6000/rs6000.opt (-mspe, -mspe=no, -mspe=yes): Delete.

From-SVN: r248981

	* config/rs6000/rs6000-common.c (rs6000_handle_option): Remove
	SPE ABI handling.
	* config/rs6000/paired.md (paired_negv2sf2): Rename to negv2sf2.
	(paired_absv2sf2, paired_addv2sf3, paired_subv2sf3, paired_mulv2sf3,
	paired_divv2sf3): Similar.
	* config/rs6000/predicates.md: Replace TARGET_SPE, TARGET_SPE_ABI,
	SPE_VECTOR_MODE and SPE_HIGH_REGNO_P by 0; simplify.
	* config/rs6000/rs6000-builtin.def: Delete RS6000_BUILTIN_E and
	RS6000_BUILTIN_S.
	Delete BU_SPE_1, BU_SPE_2, BU_SPE_3, BU_SPE_E, BU_SPE_P, and BU_SPE_X.
	Rename the paired_* instruction patterns.
	* config/rs6000/rs6000-c.c (rs6000_target_modify_macros): Do not
	define __SPE__.
	* config/rs6000/rs6000-protos.h (invalid_e500_subreg): Delete.
	* config/rs6000/rs6000.c: Delete RS6000_BUILTIN_E and RS6000_BUILTIN_S.
	(struct rs6000_stack): Delete fields spe_gp_save_offset, spe_gp_size,
	spe_padding_size, and spe_64bit_regs_used.  Replace TARGET_SPE and
	TARGET_SPE_ABI with 0, simplify.  Replace SPE_VECTOR_MODE with
	PAIRED_VECTOR_MODE.
	(struct machine_function): Delete field spe_insn_chain_scanned_p.
	(spe_func_has_64bit_regs_p): Delete.
	(spe_expand_predicate_builtin): Delete.
	(spe_expand_evsel_builtin): Delete.
	(TARGET_DWARF_REGISTER_SPAN): Do not define.
	(TARGET_MEMBER_TYPE_FORCES_BLK): Do not define.
	(invalid_e500_subreg): Delete.
	(rs6000_legitimize_address): Always force_reg op2 as well, for
	paired single memory accesses.
	(rs6000_member_type_forces_blk): Delete.
	(rs6000_spe_function_arg): Delete.
	(rs6000_expand_unop_builtin): Delete SPE handling.
	(rs6000_expand_binop_builtin): Ditto.
	(spe_expand_stv_builtin): Delete.
	(bdesc_2arg_spe): Delete.
	(spe_expand_builtin): Delete.
	(spe_expand_predicate_builtin): Delete.
	(spe_expand_evsel_builtin): Delete.
	(rs6000_invalid_builtin): Remove RS6000_BTM_SPE handling.
	(spe_init_builtins): Delete.
	(spe_func_has_64bit_regs_p): Delete.
	(savres_routine_name): Delete "info" parameter.  Adjust callers.
	(rs6000_emit_stack_reset): Ditto.
	(rs6000_dwarf_register_span): Delete.
	* config/rs6000/rs6000.h (TARGET_SPE_ABI, TARGET_SPE,
	UNITS_PER_SPE_WORD, SPE_HIGH_REGNO_P, SPE_SIMD_REGNO_P,
	SPE_VECTOR_MODE, RS6000_BTM_SPE, RS6000_BUILTIN_E, RS6000_BUILTIN_S):
	Delete.
	* config/rs6000/rs6000.md (FIRST_SPE_HIGH_REGNO, LAST_SPE_HIGH_REGNO):
	Delete.
	* config/rs6000/rs6000.opt (-mabi=spe, -mabi=no-spe): Delete.
	* config/rs6000/spe.md: Delete every pattern that uses TARGET_SPE.
	* config/rs6000/vector.md (absv2sf2, negv2sf2, addv2sf3, subv2sf3,
	mulv2sf3, divv2sf3): Delete expanders.

From-SVN: r248980

	config/rs6000/rs6000.md (UNSPEC_MV_CR_GT): Delete.

From-SVN: r248979

	* config/rs6000/rs6000-protos.h (output_e500_flip_gt_bit): Delete.
	* config/rs6000/rs6000.c: Ditto.

From-SVN: r248978

rs6000_cbranch_operator now is just comparison_operator, so just use
that directly.


	* config/rs6000/predicated.md (rs6000_cbranch_operator): Delete.
	* config/rs6000/rs6000.md: Replace rs6000_cbranch_operator by
	comparison_operator.

From-SVN: r248977

This deletes -mfloat-gprs and the variables that go with it.


	* config/rs6000/rs6000.c: Remove everything related to -mfloat-gprs.
	* config/rs6000/rs6000.opt: Ditto.
	* config/rs6000/t-rtems: Ditto.

From-SVN: r248976

TARGET_E500_{SINGLE,DOUBLE} is always false now.


	* config/rs6000/predicates.md: Replace TARGET_E500_DOUBLE and
	TARGET_E500_SINGLE by 0, simplify.
	* config/rs6000/rs6000.c: Ditto.
	(rs6000_option_override_internal): Delete CHECK_E500_OPTIONS.
	(spe_build_register_parallel): Delete.
	* config/rs6000/rs6000.h: Delete TARGET_E500_SINGLE,
	TARGET_E500_DOUBLE, and CHECK_E500_OPTIONS.
	* config/rs6000/rs6000.md: Replace TARGET_E500_DOUBLE,
	TARGET_E500_SINGLE, and <E500_CONVERT> by 0, simplify.
	(E500_CONVERT): Delete.
	* config/rs6000/spe.md: Remove many patterns and all define_constants.

From-SVN: r248975

Since rs6000 no longer supports SPE, TARGET_FPRS now always is true.

This makes TARGET_{SF,DF}_SPE always false.  Many patterns in spe.md
can now be deleted; which makes it possible to merge e.g. negdd2 with
*negdd2_fpr.

Finally, e500.h is deleted (it isn't used).


	* config/rs6000/darwin.md: Replace TARGET_FPRS by 1 and simplify.
	* config/rs6000/dfp.md: Ditto.
	(negdd2, *negdd2_fpr): Merge.
	(absdd2, *absdd2_fpr): Merge.
	(negtd2, *negtd2_fpr): Merge.
	(abstd2, *abstd2_fpr): Merge.
	* config/rs6000/e500.h: Delete file.
	* config/rs6000/predicates.md (rs6000_cbranch_operator): Replace
	TARGET_FPRS by 1 and simplify.
	* config/rs6000/rs6000-c.c: Ditto.
	* config/rs6000/rs6000.c: Ditto.  Also replace TARGET_SF_SPE and
	TARGET_DF_SPE by 0.
	* config/rs6000/rs6000.h: Ditto.  Delete TARGET_SF_SPE and
	TARGET_DF_SPE.
	* config/rs6000/rs6000.md: Ditto.
	(floatdidf2, *floatdidf2_fpr): Merge.
	(move_from_CR_gt_bit): Delete.
	* config/rs6000/spe.md: Replace TARGET_FPRS by 1 and simplify.
	(E500_CR_IOR_COMPARE): Delete.
	(All patterns that require !TARGET_FPRS): Delete.
	* config/rs6000/vsx.md: Replace TARGET_FPRS by 1 and simplify.

From-SVN: r248974

	* class.c (layout_class_type): Restructure overlong-bitfield tpe
	search.

From-SVN: r248971

From-SVN: r248969

2017-06-07  Tony Reix  <tony.reix@atos.net>
            Matthieu Sarter  <matthieu.sarter.external@atos.net>
            David Edelsohn  <dje.gcc@gmail.com>

        * config/rs6000/aix-unwind.h (MD_FALLBACK_FRAME_STATE_FOR): Define
        unconditionally.
        (ucontext_for): Add 64-bit AIX 6.1, 7.1, 7.2 support.  Add 32-bit
        AIX 7.2 support.

Co-Authored-By: David Edelsohn <dje.gcc@gmail.com>
Co-Authored-By: Matthieu Sarter <matthieu.sarter.external@atos.net>

From-SVN: r248968

	* include/bits/alloc_traits.h (__is_allocator, _RequireAllocator):
	New trait and alias for detecting Allocator-like types.
	* include/bits/basic_string.h (basic_string): Add deduction guide
	from P0433.
	* include/ext/alloc_traits.h (__gnu_cxx::__alloc_traits): Add template
	parameter with default template argument that causes substitution
	failures for types that cannot be allocators.
	* testsuite/21_strings/basic_string/cons/char/deduction.cc: New.
	* testsuite/21_strings/basic_string/cons/wchar_t/deduction.cc: New.

From-SVN: r248967

gcc/cp:

	PR c++/80990
	* pt.c (do_class_deduction): Build qualified type.

gcc/testsuite:

	PR c++/80990
	* g++.dg/cpp1z/class-deduction39.C: New.

From-SVN: r248966