2016-08-03  Fritz Reese  <fritzoreese@gmail.com>

	gcc/fortran/
	* lang.opt: New option -fdec-intrinsic-ints.
	* options.c (set_dec_flags): Enable with -fdec.
	* gfortran.texi, invoke.texi, intrinsics.texi: Update documentation.
	* intrinsic.c (add_function, add_subroutine): New B/I/J/K intrinsic
	variants.

	gcc/testsuite/gfortran.dg/
	* dec_intrinsic_ints.f90: New testcase.

From-SVN: r239078

2016-08-03  Richard Biener  <rguenther@suse.de>

	* c-c++-common/ubsan/pr71403-1.c: Use dg-additional-options
	and remove -O3.
	* c-c++-common/ubsan/pr71403-2.c: Likewise.
	* c-c++-common/ubsan/pr71403-3.c: Likewise.

From-SVN: r239077

2016-08-03  Richard Biener  <rguenther@suse.de>

	* gcc.dg/tree-ssa/loadpre2.c: Disable LIM.
	* gcc.dg/tree-ssa/loadpre21.c: Likewise.
	* gcc.dg/tree-ssa/loadpre22.c: Likewise.
	* gcc.dg/tree-ssa/ssa-pre-23.c: Likewise.

From-SVN: r239071

	* branch_changer.py: New file.

From-SVN: r239066

Require int32plus for tests that assume so, and conditionally skip pr44024.c,
 as it only works if the target allows deletion of null pointer checks.

gcc/testsuite/ChangeLog

	* gcc.dg/init-excess-2.c: Require int32plus.
	* gcc.dg/pr44024.c: Skip if target keeps null pointer checks.
	* gcc.dg/pr59963-2.c: Require int32plus.
	* gcc.dg/pr71084.c: Cast pointer to intprt_t.
	* gcc.dg/unroll-7.c: Require int32plus.

From-SVN: r239065

According to the POWER8 Processor User’s Manual and some
experimentation on power8 hardware, unaligned fp load/store on power8
does not invoke the alignment interrupt.

	* config/rs6000/rs6000.h (SLOW_UNALIGNED_ACCESS): Make scalar
	float access depend on TARGET_EFFICIENT_UNALIGNED_VSX.
	* config/rs6000/rs6000.opt (-mefficient-unaligned-vsx): Renamed
	from -mefficient-unaligned-vector.  Note that this affects fp too.

From-SVN: r239013

	* config/rs6000/rs6000.c (rs6000_rtx_costs): Make unaligned mem
	cost more.

From-SVN: r239012

	* config/rs6000/rs6000.md (fix_trunc<mode>si2): Force source operand
	to a reg.  Localize vars.

From-SVN: r239011

	* config/rs6000/rs6000.opt: Remove negatives from help strings
	and comments.

From-SVN: r239010

This removes the duplicate (TARGET_POWERPC64 && size == 16) block.

	* config/rs6000/rs6000.c (rs6000_secondary_reload_direct_move):
	Delete duplicated code.

From-SVN: r239009

From-SVN: r239008

    
    Emit basic debug information when compiling with the flag
    -fgo-debug-escape#.
    
    Reviewed-on: https://go-review.googlesource.com/22376

	2016-08-02  Chris Manghane  <cmang@google.com>

	* lang.opt: Add -fgo-debug-escape option.
	* go-c.h (go_create_gogo): Add debug_escape_level parameter.
	* go-lang.c (go_langhook_init): Pass go_debug_escape_level to
	go_create_gogo.

From-SVN: r239002

2016-08-02  Vladimir Makarov  <vmakarov@redhat.com>

	PR middle-end/72778
	* lra-spills.c (regno_in_use_p): New.
	(lra_final_code_change): Use it.

From-SVN: r239000

	* testsuite/21_strings/basic_string/allocator/wchar_t/copy.cc:
	Remove reundant check for _GLIBCXX_USE_WCHAR_T and fix char type.
	* testsuite/21_strings/basic_string/allocator/wchar_t/copy_assign.cc:
	Likewise.
	* testsuite/21_strings/basic_string/allocator/wchar_t/minimal.cc:
	Likewise.
	* testsuite/21_strings/basic_string/allocator/wchar_t/move.cc:
	Likewise.
	* testsuite/21_strings/basic_string/allocator/wchar_t/move_assign.cc:
	Likewise.
	* testsuite/21_strings/basic_string/allocator/wchar_t/noexcept.cc:
	Likewise.
	* testsuite/21_strings/basic_string/allocator/wchar_t/swap.cc:
	Likewise.

From-SVN: r238996

	* testsuite/lib/libstdc++.exp (check_v3_target_filesystem_ts): Improve
	comments.

From-SVN: r238995

	* testsuite/19_diagnostics/error_code/operators/bool_neg.cc: Move
	dg-error to relevant line.
	* testsuite/19_diagnostics/error_condition/operators/bool_neg.cc:
	Likewise.
	* testsuite/20_util/ratio/cons/cons_overflow_neg.cc: Likewise.

From-SVN: r238994

	* scripts/testsuite_flags.in: Add -fno-show-column to cxxflags.

From-SVN: r238993

2016-08-02  Roger Sayle  <roger@nextmovesoftware.com>

	* expr.c (push_value): Only call flush_quick_stack for non-constant
	arguments.
	(build_java_throw_out_of_bounds_exception): No longer wrap calls
	to _Jv_ThowBadArrayIndex in a COMPOUND_EXPR as no longer needed.
	(java_check_reference): Annotate COND_EXPR with __builtin_expect
	to indicate that calling _Jv_ThrowNullPointerException is unlikely.
	(build_java_arrayaccess): Construct an unlikely COND_EXPR instead
	of a TRUTH_ANDIF_EXPR in a COMPOUND_EXPR.  Only generate array
	index MULT_EXPR when size_exp is not unity.
	(build_array_length_annotation): When optimizing, generate a write
	to the allocated array's length field to expose constant lengths
	to GCC's optimizers.
	(build_newarray): Call new build_array_length_annotation.
	(build_anewarray): Likewise.

	(expand_java_multianewarray): Fix whitespace.
	(expand_java_return): Likewise.
	(expand_invoke): Likewise.
	(load_type_state): Likewise.

From-SVN: r238992

2016-08-02  Vladimir Makarov  <vmakarov@redhat.com>

	PR rtl-optimization/69847
	* lra-int.h (struct lra-reg): Use restore_rtx instead of
	restore_regno.
	(lra_rtx_hash): New.
	* lra.c (initialize_lra_reg_info_element): Use restore_rtx instead
	of restore_regno.
	(lra_rtx_hash): Rename and move lra-remat.c::rtx_hash.
	* lra-remat.c (rtx_hash): Rename and Move to lra.c.
	* lra-spills.c (lra_final_code_change): Don't delete insn when the
	next insn is USE with the same reg as the current insn source.
	* lra-constraints.c (curr_insn_transform): Use restore_rtx instead
	of restore_regno.
	(lra_constraints_init): Call initiate_invariants.
	(lra_constraints_finish): Call finish_invariants.
	(struct invariant, invariant_t, invariant_ptr_t): New.
	(const_invariant_ptr_t, invariants, invariants_pool): New.
	(invariant_table, invariant_hash, invariant_eq_p): New.
	(insert_invariant, initiate_invariants, finish_invariants): New.
	(clear_invariants, invalid_invariant_regs): New.
	(inherit_reload_reg, split_reg, fix_bb_live_info): Use restore_rtx
	instead of restore_regno.
	(invariant_p, process_invariant_for_inheritance): New.
	(inherit_in_ebb): Implement invariant inheritance.
	(lra_inheritance): Initialize and finalize invalid_invariant_regs.
	(remove_inheritance_pseudos): Implement undoing invariant
	inheritance.
	(undo_optional_reloads, lra_undo_inheritance): Use restore_rtx
	instead of restore_regno.
	* lra-assigns.c (regno_live_length): New.
	(reload_pseudo_compare_func): Use regno_live_length.
	(assign_by_spills): Use restore_rtx instead of restore_regno.
	(lra_assign): Ditto.  Initiate regno_live_length.

From-SVN: r238991

From-SVN: r238990

I deleted an 'f' halfway through a line when applying r238977. Not sure
how I managed it, but entirely my fault.

gcc/

	* config/aarch64/arm_neon.h (vminnm_f64): Add back missing 'f' from
	__builtin_aarch64_fmindf.

From-SVN: r238989

	* testsuite/18_support/bad_exception/23591_thread-1.c: Skip test if
	options are present that aren't valid for C.
	* testsuite/abi/header_cxxabi.c: Likewise.

From-SVN: r238988

	* testsuite/tr1/5_numerical_facilities/special_functions/16_hermite/
	check_value.cc: Do not add special functions to namespace std in TR1
	test.

From-SVN: r238987

	* testsuite/ext/special_functions/conf_hyperg/check_nan.cc: Only
	run for C++11 and later.
	* testsuite/ext/special_functions/conf_hyperg/check_value.cc:
	Likewise.
	* testsuite/ext/special_functions/conf_hyperg/compile.cc: Likewise.
	* testsuite/ext/special_functions/hyperg/check_nan.cc: Likewise.
	* testsuite/ext/special_functions/hyperg/check_value.cc: Likewise.
	* testsuite/ext/special_functions/hyperg/compile.cc: Likewise.
	* testsuite/special_functions/01_assoc_laguerre/check_nan.cc:
	Likewise.
	* testsuite/special_functions/01_assoc_laguerre/check_value.cc:
	Likewise.
	* testsuite/special_functions/01_assoc_laguerre/compile.cc: Likewise.
	* testsuite/special_functions/01_assoc_laguerre/compile_2.cc:
	Likewise.
	* testsuite/special_functions/02_assoc_legendre/check_nan.cc:
	Likewise.
	* testsuite/special_functions/02_assoc_legendre/check_value.cc:
	Likewise.
	* testsuite/special_functions/02_assoc_legendre/compile.cc: Likewise.
	* testsuite/special_functions/02_assoc_legendre/compile_2.cc:
	* testsuite/special_functions/03_beta/check_nan.cc: Likewise.
	* testsuite/special_functions/03_beta/check_value.cc: Likewise.
	* testsuite/special_functions/03_beta/compile.cc: Likewise.
	* testsuite/special_functions/03_beta/compile_2.cc: Likewise.
	* testsuite/special_functions/04_comp_ellint_1/check_nan.cc: Likewise.
	* testsuite/special_functions/04_comp_ellint_1/check_value.cc:
	Likewise.
	* testsuite/special_functions/04_comp_ellint_1/compile.cc: Likewise.
	* testsuite/special_functions/04_comp_ellint_1/compile_2.cc: Likewise.
	* testsuite/special_functions/05_comp_ellint_2/check_nan.cc: Likewise.
	* testsuite/special_functions/05_comp_ellint_2/check_value.cc:
	Likewise.
	* testsuite/special_functions/05_comp_ellint_2/compile.cc: Likewise.
	* testsuite/special_functions/05_comp_ellint_2/compile_2.cc: Likewise.
	* testsuite/special_functions/06_comp_ellint_3/check_nan.cc: Likewise.
	* testsuite/special_functions/06_comp_ellint_3/check_value.cc:
	Likewise.
	* testsuite/special_functions/06_comp_ellint_3/compile.cc: Likewise.
	* testsuite/special_functions/06_comp_ellint_3/compile_2.cc: Likewise.
	* testsuite/special_functions/07_cyl_bessel_i/check_nan.cc: Likewise.
	* testsuite/special_functions/07_cyl_bessel_i/check_value.cc:
	Likewise.
	* testsuite/special_functions/07_cyl_bessel_i/compile.cc: Likewise.
	* testsuite/special_functions/07_cyl_bessel_i/compile_2.cc: Likewise.
	* testsuite/special_functions/07_cyl_bessel_i/pr56216.cc: Likewise.
	* testsuite/special_functions/08_cyl_bessel_j/check_nan.cc: Likewise.
	* testsuite/special_functions/08_cyl_bessel_j/check_value.cc:
	Likewise.
	* testsuite/special_functions/08_cyl_bessel_j/compile.cc: Likewise.
	* testsuite/special_functions/08_cyl_bessel_j/compile_2.cc: Likewise.
	* testsuite/special_functions/09_cyl_bessel_k/check_nan.cc: Likewise.
	* testsuite/special_functions/09_cyl_bessel_k/check_value.cc:
	Likewise.
	* testsuite/special_functions/09_cyl_bessel_k/compile.cc: Likewise.
	* testsuite/special_functions/09_cyl_bessel_k/compile_2.cc: Likewise.
	* testsuite/special_functions/10_cyl_neumann/check_nan.cc: Likewise.
	* testsuite/special_functions/10_cyl_neumann/check_value.cc: Likewise.
	* testsuite/special_functions/10_cyl_neumann/compile.cc: Likewise.
	* testsuite/special_functions/10_cyl_neumann/compile_2.cc: Likewise.
	* testsuite/special_functions/11_ellint_1/check_nan.cc: Likewise.
	* testsuite/special_functions/11_ellint_1/check_value.cc: Likewise.
	* testsuite/special_functions/11_ellint_1/compile.cc: Likewise.
	* testsuite/special_functions/11_ellint_1/compile_2.cc: Likewise.
	* testsuite/special_functions/12_ellint_2/check_nan.cc: Likewise.
	* testsuite/special_functions/12_ellint_2/check_value.cc: Likewise.
	* testsuite/special_functions/12_ellint_2/compile.cc: Likewise.
	* testsuite/special_functions/12_ellint_2/compile_2.cc: Likewise.
	* testsuite/special_functions/13_ellint_3/check_nan.cc: Likewise.
	* testsuite/special_functions/13_ellint_3/check_value.cc: Likewise.
	* testsuite/special_functions/13_ellint_3/compile.cc: Likewise.
	* testsuite/special_functions/13_ellint_3/compile_2.cc: Likewise.
	* testsuite/special_functions/14_expint/check_nan.cc: Likewise.
	* testsuite/special_functions/14_expint/check_value.cc: Likewise.
	* testsuite/special_functions/14_expint/compile.cc: Likewise.
	* testsuite/special_functions/14_expint/compile_2.cc: Likewise.
	* testsuite/special_functions/15_hermite/check_nan.cc: Likewise.
	* testsuite/special_functions/15_hermite/check_value.cc: Likewise.
	* testsuite/special_functions/15_hermite/compile.cc: Likewise.
	* testsuite/special_functions/15_hermite/compile_2.cc: Likewise.
	* testsuite/special_functions/16_laguerre/check_nan.cc: Likewise.
	* testsuite/special_functions/16_laguerre/check_value.cc: Likewise.
	* testsuite/special_functions/16_laguerre/compile.cc: Likewise.
	* testsuite/special_functions/16_laguerre/compile_2.cc: Likewise.
	* testsuite/special_functions/17_legendre/check_nan.cc: Likewise.
	* testsuite/special_functions/17_legendre/check_value.cc: Likewise.
	* testsuite/special_functions/17_legendre/compile.cc: Likewise.
	* testsuite/special_functions/17_legendre/compile_2.cc: Likewise.
	* testsuite/special_functions/18_riemann_zeta/check_nan.cc: Likewise.
	* testsuite/special_functions/18_riemann_zeta/check_value.cc:
	Likewise.
	* testsuite/special_functions/18_riemann_zeta/compile.cc: Likewise.
	* testsuite/special_functions/18_riemann_zeta/compile_2.cc: Likewise.
	* testsuite/special_functions/19_sph_bessel/check_nan.cc: Likewise.
	* testsuite/special_functions/19_sph_bessel/check_value.cc: Likewise.
	* testsuite/special_functions/19_sph_bessel/compile.cc: Likewise.
	* testsuite/special_functions/19_sph_bessel/compile_2.cc: Likewise.
	* testsuite/special_functions/20_sph_legendre/check_nan.cc: Likewise.
	* testsuite/special_functions/20_sph_legendre/check_value.cc:
	Likewise.
	* testsuite/special_functions/20_sph_legendre/compile.cc: Likewise.
	* testsuite/special_functions/20_sph_legendre/compile_2.cc: Likewise.
	* testsuite/special_functions/21_sph_neumann/check_nan.cc: Likewise.
	* testsuite/special_functions/21_sph_neumann/check_value.cc: Likewise.
	* testsuite/special_functions/21_sph_neumann/compile.cc: Likewise.
	* testsuite/special_functions/21_sph_neumann/compile_2.cc: Likewise.

From-SVN: r238986

	* testsuite/tr1/5_numerical_facilities/special_functions/
	08_cyl_bessel_i/check_value.cc: Use __attribute__((unused)) instead
	of [[gnu::unused]].
	* testsuite/tr1/5_numerical_facilities/special_functions/
	09_cyl_bessel_j/check_value.cc: Likewise.
	* testsuite/tr1/5_numerical_facilities/special_functions/
	10_cyl_bessel_k/check_value.cc: Likewise.
	* testsuite/tr1/5_numerical_facilities/special_functions/
	11_cyl_neumann/check_value.cc: Likewise.
	* testsuite/tr1/5_numerical_facilities/special_functions/
	21_sph_bessel/check_value.cc: Likewise.
	* testsuite/tr1/5_numerical_facilities/special_functions/
	23_sph_neumann/check_value.cc: Likewise.

From-SVN: r238985

	* config/abi/post/solaris2.10/baseline_symbols.txt: Regenerate.
	* config/abi/post/solaris2.10/amd64/baseline_symbols.txt: Likewise.
	* config/abi/post/solaris2.10/sparcv9/baseline_symbols.txt: Likewise.
	* config/abi/post/solaris2.11/baseline_symbols.txt: Likewise.
	* config/abi/post/solaris2.11/amd64/baseline_symbols.txt: Likewise.
	* config/abi/post/solaris2.11/sparcv9/baseline_symbols.txt: Likewise.

From-SVN: r238984

	PR tree-optimization/34114
	* tree-ssa-loop-niter.c (number_of_iterations_ne): Prove no-overflow
	information for more control IVs.

	gcc/testsuite
	PR tree-optimization/34114
	* gcc.dg/tree-ssa/loop-42.c: New test.

From-SVN: r238983

	PR tree-optimization/34114
	* fold-const.c (multiple_of_p): Improve MULT_EXPR, PLUS_EXPR,
	PLUS_EXPR case.  Handle SSA_NAME case.

From-SVN: r238982

	* testsuite/29_atomics/atomic_flag/test_and_set/explicit-hle.cc: Skip
	test if -flto used.

From-SVN: r238981

	* testsuite/lib/libstdc++.exp (v3-build_support): Add -fno-lto to
	additional flags for compiling libtestc++.a objects.

From-SVN: r238978

Add vmaxnm_f64, vminnm_f64, vmax_f64, vmin_f64.

Committed on behalf of Tamar Christina <tamar.christina@arm.com> .

gcc/

	* config/aarch64/aarch64-simd-builtins.def
	(__builtin_aarch64_fmindf): Change BUILTIN_VDQF to BUILTIN_VDQF_DF.
	(__builtin_aarch64_fmaxdf): Likewise.
	(__builtin_aarch64_smin_nandf): Likewise.
	(__builtin_aarch64_smax_nandf): Likewise.
	* config/aarch64/aarch64-simd.md (<fmaxmin><mode>3): Remove.
	* config/aarch64/aarch64.md (<fmaxmin><mode>3): Rename to...
	(<fmaxmin><mode>3): ...this.
	* config/aarch64/arm_neon.h (vmaxnm_f64): New.
	(vminnm_f64): Likewise.
	(vmin_f64): Likewise.
	(vmax_f64): Likewise.
	* config/aarch64/iterators.md (FMAXMIN): Merge with...
	(FMAXMIN_UNS): ...this.
	(fmaxmin): Merged with
	(fmaxmin_op): ...this...
	(maxmin_uns_op): ...in to this.

gcc/testsuite/

	* gcc.target/aarch64/vminmaxnm.c: New.
	* gcc.target/aarch64/simd/vminmaxnm_1.c (main): Added float64x1_t
	tests.

From-SVN: r238977

From-SVN: r238976

[gcc]
2016-08-01  Michael Meissner  <meissner@linux.vnet.ibm.com>

	* config/rs6000/rs6000-c.c (altivec_resolve_overloaded_builtin):
	Add support for vec_extract on vector float, vector int, vector
	short, and vector char vector types.
	* config/rs6000/rs6000.c (rs6000_expand_vector_extract): Add
	vector float, vector int, vector short, and vector char
	optimizations on 64-bit ISA 2.07 systems for both constant and
	variable element numbers.
	(rs6000_split_vec_extract_var): Likewise.
	* config/rs6000/vsx.md (vsx_xscvspdp_scalar2): Allow SFmode to be
	Altivec registers on ISA 2.07 and above.
	(vsx_extract_v4sf): Delete alternative that hard coded element 0,
	which never was matched due to the split occuring before register
	allocation (and the code would not have worked on little endian
	systems if it did match).  Allow extracts to go to the Altivec
	registers if ISA 2.07 (power8).  Change from using "" around the
	C++ code to using {}'s.
	(vsx_extract_v4sf_<mode>_load): New insn to optimize vector float
	vec_extracts when the vector is in memory.
	(vsx_extract_v4sf_var): New insn to optimize vector float
	vec_extracts when the element number is variable on 64-bit ISA
	2.07 systems.
	(vsx_extract_<mode>, VSX_EXTRACT_I iterator): Add optimizations
	for 64-bit ISA 2.07 as well as ISA 3.0.
	(vsx_extract_<mode>_p9, VSX_EXTRACT_I iterator): Likewise.
	(vsx_extract_<mode>_p8, VSX_EXTRACT_I iterator): Likewise.
	(vsx_extract_<mode>_load, VSX_EXTRACT_I iterator): New insn to
	optimize vector int, vector short, and vector char vec_extracts
	when the vector is in memory.
	(vsx_extract_<mode>_var, VSX_EXTRACT_I iterator): New insn to
	optimize vector int, vector short, and vector char vec_extracts
	when the element number is variable.

[gcc/testsuite]
2016-08-01  Michael Meissner  <meissner@linux.vnet.ibm.com>

	* gcc.target/powerpc/vec-extract-5.c: New tests to test
	vec_extract for vector float, vector int, vector short, and vector
	char.
	* gcc.target/powerpc/vec-extract-6.c: Likewise.
	* gcc.target/powerpc/vec-extract-7.c: Likewise.
	* gcc.target/powerpc/vec-extract-8.c: Likewise.
	* gcc.target/powerpc/vec-extract-9.c: Likewise.

From-SVN: r238971

	* mangle.c (mangle_decl): Warn about mangled name change even if
	DECL_REALLY_EXTERN.

From-SVN: r238966

	* mangle.c (get_abi_tags): New.

	(find_substitution, write_unqualified_name, write_abi_tags)
	(maybe_check_abi_tags): Use it.

From-SVN: r238965

From-SVN: r238964

	* include/bits/basic_string.h (data() const): Update comment.
	(data()): Add non-const overload for C++17.
	* testsuite/21_strings/basic_string/operations/data/char/2.cc: New.
	* testsuite/21_strings/basic_string/operations/data/wchar_t/2.cc: New.

From-SVN: r238963

	PR target/71948
	* config/avr/avr.c (AVR_SYMBOL_FLAG_TINY_PM): Use a value that
	does not overlap with other symbol flags.

From-SVN: r238961

This patch optimizes the prolog and epilog code to reduce the number of instructions and avoid multiple writes to SP.

This patch optimizes the prolog and epilog code to reduce the number of
instructions and avoid multiple writes to SP.  The key idea is that epilogs
are almost exact reverses of prologs, and thus all the decisions only need
to be taken once.  The frame layout is decided in aarch64_layout_frame()
and decisions recorded in the new aarch64_frame fields initial_adjust,
callee_adjust, callee_offset and final_adjust.

A generic frame setup consists of 5 basic steps:

1. sub sp, sp, initial_adjust
2. stp reg1, reg2, [sp, -callee_adjust]!      (push if callee_adjust != 0)
3. add fp, sp, callee_offset                  (if frame_pointer_needed)
4. stp reg3, reg4, [sp, callee_offset + N*16] (store remaining callee-saves)
5. sub sp, sp, final_adjust

The epilog reverses this, and may omit step 3 if alloca wasn't used.

    gcc/
	* config/aarch64/aarch64.h (aarch64_frame):
	Remove padding0 and hardfp_offset.  Add locals_offset,
	initial_adjust, callee_adjust, callee_offset and final_adjust.
	* config/aarch64/aarch64.c (aarch64_layout_frame):
	Remove unused padding0 and hardfp_offset initializations.
	Choose frame layout and set frame variables accordingly.
	Use INVALID_REGNUM instead of FIRST_PSEUDO_REGISTER.
	(aarch64_push_regs): Use INVALID_REGNUM, not FIRST_PSEUDO_REGISTER.
	(aarch64_pop_regs): Likewise.
	(aarch64_expand_prologue): Remove all decision code, just emit
	prolog according to frame variables.
	(aarch64_expand_epilogue): Remove all decision code, just emit
	epilog according to frame variables.
	(aarch64_initial_elimination_offset): Use offset to local/arg area.

    testsuite/
	* gcc.target/aarch64/test_frame_10.c: Fix test to check for a
	single stack adjustment, no writeback.	
	* gcc.target/aarch64/test_frame_12.c: Likewise.
	* gcc.target/aarch64/test_frame_13.c: Likewise.
	* gcc.target/aarch64/test_frame_15.c: Likewise.
	* gcc.target/aarch64/test_frame_6.c: Likewise.
	* gcc.target/aarch64/test_frame_7.c: Likewise.
	* gcc.target/aarch64/test_frame_8.c: Likewise.
	* gcc.target/aarch64/test_frame_16.c: New test.

From-SVN: r238960

	* include/bits/basic_string.tcc: Disable explicit instantiation
	declarations for C++17.

From-SVN: r238959