The vec_perm code falls back to doing byte-level permutes if element-level permutes aren't supported.

qimode_for_vec_perm

The vec_perm code falls back to doing byte-level permutes if
element-level permutes aren't supported.  There were two copies
of the code to calculate the mode, and later patches add another,
so this patch splits it out into a helper function.

2018-01-02  Richard Sandiford  <richard.sandiford@linaro.org>

gcc/
	* optabs-query.h (qimode_for_vec_perm): Declare.
	* optabs-query.c (can_vec_perm_p): Split out qimode search to...
	(qimode_for_vec_perm): ...this new function.
	* optabs.c (expand_vec_perm): Use qimode_for_vec_perm.

From-SVN: r256089

2017-01-02  Thomas Koenig  <tkoenig@gcc.gnu.org>

	PR fortran/45689
	* intrinsic.c (add_function): Add gfc_simplify_maxloc and
	gfc_simplify_minloc to maxloc and minloc, respectively.
	* intrinsic.h: Add prototypes for gfc_simplify_minloc
	and gfc_simplify_maxloc.
	* simplify.c (min_max_chose): Adjust prototype.  Modify function
	to have a return value which indicates if the extremum was found.
	(is_constant_array_expr): Fix typo in comment.
	(simplify_minmaxloc_to_scalar): New function.
	(simplify_minmaxloc_nodim): New function.
	(new_array): New function.
	(simplify_minmaxloc_to_array): New function.
	(gfc_simplify_minmaxloc): New function.
	(simplify_minloc): New function.
	(simplify_maxloc): New function.

2017-01-02  Thomas Koenig  <tkoenig@gcc.gnu.org>

	PR fortran/45689
	* gfortran.dg/minloc_4.f90: New test case.
	* gfortran.dg/maxloc_4.f90: New test case.

From-SVN: r256088

	PR c++/83556
	* tree.c (replace_placeholders_r): Pass NULL as last argument to
	cp_walk_tree instead of d->pset.  If non-TREE_CONSTANT and
	non-PLACEHOLDER_EXPR tree has been seen already, set *walk_subtrees
	to false and return.
	(replace_placeholders): Pass NULL instead of &pset as last argument
	to cp_walk_tree.

	* g++.dg/cpp0x/pr83556.C: New test.

From-SVN: r256086

2018-01-02  Thomas Koenig  <tkoenig@gcc.gnu.org>

	PR fortran/45689
	PR fortran/83650
	* simplify.c (gfc_simplify_cshift): Re-implement to allow full
	range of arguments.

2018-01-02  Thomas Koenig  <tkoenig@gcc.gnu.org>

	PR fortran/45689
	PR fortran/83650
	* gfortran.dg/simplify_cshift_1.f90: Correct erroneous case.
	* gfortran.dg/simplify_cshift_4.f90: New test.

From-SVN: r256084

2017-12-12  Aaron Sawdey  <acsawdey@linux.vnet.ibm.com>

        PR target/82190
        * config/rs6000/rs6000-string.c (expand_block_compare,
        expand_strn_compare): Fix set_mem_size() calls.

From-SVN: r256083

	PR c++/83644
	* g++.dg/cpp1z/pr83644.C: New test.

From-SVN: r256082

2018-01-02  Aaron Sawdey  <acsawdey@linux.vnet.ibm.com>

        * rtlanal.c (canonicalize_condition): Return 0 if final rtx
        does not have a conditional at the top.

Forgot this changelog entry.

From-SVN: r256081

        * rtlanal.c (canonicalize_condition): Return 0 if final rtx
        does not have a conditional at the top.

From-SVN: r256079

	PR c++/81860
	* g++.dg/cpp0x/inh-ctor30.C: New test.

From-SVN: r256076

https://gcc.gnu.org/ml/gcc-patches/2018-01/msg00041.html
	* constexpr.c (cxx_bind_parameters_in_call): Remove unneeded local
	lval var.

From-SVN: r256075

It turns out that Linux never reads or writes more than 2147479552
bytes in a single syscall. For writes this is not a problem as
libgfortran already contains a loop around write() to handle short
writes. But for reads we cannot do this, since then read will hang if
we have a short read when reading from the terminal.  Also, there are
reports that macOS fails I/O's larger than 2 GB.  Thus, to work around
these issues do large reads/writes in chunks.

The testcase from the PR

program largewr
  integer(kind=1) :: a(2_8**31+1)
  a = 0
  a(size(a, kind=8)) = 1
  open(10, file="largewr.dat", access="stream", form="unformatted")
  write (10) a
  close(10)
  a(size(a, kind=8)) = 2
  open(10, file="largewr.dat", access="stream", form="unformatted")
  read (10) a
  if (a(size(a, kind=8)) == 1) then
    print *, "All is well"
  else
    print *, "Oh no"
  end if
end program largewr

fails on trunk but works with the patch.

Regtested on x86_64-pc-linux-gnu, committed to trunk.

libgfortran/ChangeLog:

2018-01-02  Janne Blomqvist  <jb@gcc.gnu.org>

	PR libgfortran/83649
	* io/unix.c (MAX_CHUNK): New define.
	(raw_read): For reads larger than MAX_CHUNK, loop.
	(raw_write): Write no more than MAX_CHUNK bytes per iteration.

From-SVN: r256074

	PR target/81616
	* config/i386/x86-tune-costs.h: Increase cost of integer load costs
	for generic 4->6.

From-SVN: r256073

2018-01-02  Richard Biener  <rguenther@suse.de>

	* ipa-inline.c (big_speedup_p): Fix expression.

From-SVN: r256072

From-SVN: r256071

	PR target/81616
	* x86-tune-costs.h (generic_cost): Reduce cost of FDIV 20->17,
	cost of sqrt 20->14, DIVSS 18->13, DIVSD 32->17, SQRtSS 30->14
	and SQRTsD 58->18, cond_not_taken_branch_cost. 2->1. Increase
	cond_taken_branch_cost 3->4.

From-SVN: r256070

2017-01-02  Richard Biener  <rguenther@suse.de>

	PR lto/83452
	* simple-object-elf.c (simple_object_elf_copy_lto_debug_section):
	Do not use UNDEF locals for removed symbols but instead just
	define them in the first prevailing section and with no name.
	Use the same gnu_lto_v1 name for all removed globals we promote to
	WEAK UNDEFs so hpux can use a stub to provide this symbol.  Clear
	sh_info and sh_link in removed sections.

From-SVN: r256069

From-SVN: r256068

2018-01-01  Paul Thomas  <pault@gcc.gnu.org>

	PR fortran/83076
	* resolve.c (resolve_fl_derived0): Add caf_token fields for
	allocatable and pointer scalars, when -fcoarray selected.
	* trans-types.c (gfc_copy_dt_decls_ifequal): Copy the token
	field as well as the backend_decl.
	(gfc_get_derived_type): Flag GFC_FCOARRAY_LIB for module
	derived types that are not vtypes. Components with caf_token
	attribute are pvoid types. For a component requiring it, find
	the caf_token field and have the component token field point to
	its backend_decl.

	PR fortran/83319
	*trans-types.c (gfc_get_array_descriptor_base): Add the token
	field to the descriptor even when codimen not set.


2018-01-01  Paul Thomas  <pault@gcc.gnu.org>

	PR fortran/83076
	* gfortran.dg/coarray_45.f90 : New test.

	PR fortran/83319
	* gfortran.dg/coarray_46.f90 : New test.

From-SVN: r256065

From-SVN: r256059

From-SVN: r256058

	PR tree-optimization/83581
	* tree-loop-distribution.c (pass_loop_distribution::execute): Return
	TODO_cleanup_cfg if any changes have been made.

	* gcc.dg/pr83581.c: New test.

From-SVN: r256055

	PR c/83595
	* c-parser.c (c_parser_braced_init, c_parser_initelt,
	c_parser_conditional_expression, c_parser_cast_expression,
	c_parser_sizeof_expression, c_parser_alignof_expression,
	c_parser_postfix_expression, c_parser_omp_declare_reduction,
	c_parser_transaction_expression): Use set_error () method instead
	of setting value member to error_mark_node.

	* gcc.dg/pr83595.c: New test.

From-SVN: r256054

	PR middle-end/83608
	* expr.c (store_expr_with_bounds): Use simplify_gen_subreg instead of
	convert_modes if target mode has the right side, but different mode
	class.

	* g++.dg/opt/pr83608.C: New test.

From-SVN: r256053

	PR middle-end/83609
	* expr.c (expand_assignment): Fix up a typo in simplify_gen_subreg
	last argument when extracting from CONCAT.  If either from_real or
	from_imag is NULL, use expansion through memory.  If result is not
	a CONCAT and simplify_gen_subreg fails, try to simplify_gen_subreg
	the parts directly to inner mode, if even that fails, use expansion
	through memory.

	* gcc.dg/pr83609.c: New test.
	* g++.dg/opt/pr83609.C: New test.

From-SVN: r256052

re PR middle-end/83623 (ICE: in convert_move, at expr.c:248 with -march=knl and 16bit vector bswap/rotate)

	PR middle-end/83623
	* expmed.c (expand_shift_1): For 2-byte rotates by BITS_PER_UNIT,
	check for bswap in mode rather than HImode and use that in expand_unop
	too.

	* gcc.dg/pr83623.c: New test.

From-SVN: r256051

	(check_effective_target_avx512vpopcntdqvl): New proc.
	* gcc.target/i386/avx512vpopcntdqvl-vpopcntd-1.c: Use
	avx512vpopcntdqvl effective target rather than avx512vpopcntdq.
	* gcc.target/i386/avx512vpopcntdqvl-vpopcntq-1.c: Likewise.

From-SVN: r256050

	PR target/83536
	* config/i386/i386.c (ix86_attribute_table): Remove excess
	initializer for "shared" attribute.

From-SVN: r256049

From-SVN: r256048

2017-12-30  Tom de Vries  <tom@codesourcery.com>

	PR libgomp/83046
	* omp-expand.c (expand_omp_target): If in_lto_p, mark offload_funcs with
	DECL_PRESERVE_P.
	* lto-streamer-out.c (prune_offload_funcs): New function.  Remove
	offload_funcs entries that no longer have a corresponding cgraph_node.
	Mark the remaining ones as DECL_PRESERVE_P.
	(output_lto): Call prune_offload_funcs.

	* testsuite/libgomp.oacc-c-c++-common/pr83046.c: New test.
	* testsuite/libgomp.c-c++-common/pr83046.c: New test.

From-SVN: r256045

	* config/i386/sse.md (vgf2p8affineinvqb_<mode><mask_name>,
	vgf2p8affineqb_<mode><mask_name>, vgf2p8mulb_<mode><mask_name>,
	vpshrd_<mode><mask_name>, vpshld_<mode><mask_name>,
	vpshrdv_<mode>, vpshrdv_<mode>_mask, vpshrdv_<mode>_maskz,
	vpshrdv_<mode>_maskz_1, vpshldv_<mode>, vpshldv_<mode>_mask,
	vpshldv_<mode>_maskz, vpshldv_<mode>_maskz_1, vpdpbusd_<mode>,
	vpdpbusd_<mode>_mask, vpdpbusd_<mode>_maskz, vpdpbusd_<mode>_maskz_1,
	vpdpbusds_<mode>, vpdpbusds_<mode>_mask, vpdpbusds_<mode>_maskz,
	vpdpbusds_<mode>_maskz_1, vpdpwssd_<mode>, vpdpwssd_<mode>_mask,
	vpdpwssd_<mode>_maskz, vpdpwssd_<mode>_maskz_1, vpdpwssds_<mode>,
	vpdpwssds_<mode>_mask, vpdpwssds_<mode>_maskz,
	vpdpwssds_<mode>_maskz_1, vaesdec_<mode>, vaesdeclast_<mode>,
	vaesenc_<mode>, vpclmulqdq_<mode>,
	avx512vl_vpshufbitqmb<mode><mask_scalar_merge_name>): Formatting fixes.

From-SVN: r256044

From-SVN: r256043

2017-12-30  Tom de Vries  <tom@codesourcery.com>

	PR testsuite/83612
	* c-c++-common/ubsan/object-size-9.c (t): Add alignment attribute.

From-SVN: r256042

From-SVN: r256039

2017-12-29  Jerry DeLisle  <jvdelisle@gcc.gnu.org>

        PR libgfortran/83613
        * io/unit.c (init_units): Don't forget to unlock the unit locks
        after being inserted.

From-SVN: r256035

re PR fortran/83560 (list-directed formatting of INTEGER is missing plus on output when output open with SIGN='PLUS')

2017-12-29  Jerry DeLisle  <jvdelisle@gcc.gnu.org>

        PR libgfortran/83560
        * io/write.c (write_integer): Modify to use write_decimal.
        For namelist mode, suppress leading blanks and emit them as
        trailing blanks. Change parameter from len to kind for better
        readability. (nml_write_obj): Fix comment style.

From-SVN: r256034

re PR fortran/83567 (Parametrized derived types: Segmentation fault when assigning a function return value)

2017-12-28  Paul Thomas  <pault@gcc.gnu.org>

	PR fortran/83567
	* trans-expr.c (gfc_trans_assignment_1): Free parameterized
	components of the lhs if dealloc is set.
	*trans-decl.c (gfc_trans_deferred_vars): Do not free the
	parameterized components of function results on leaving scope.


2017-12-28  Paul Thomas  <pault@gcc.gnu.org>

	PR fortran/83567
	* gfortran.dg/pdt_26.f90 : New test.

From-SVN: r256033

	* g++.old-deja/g++.ext/namedret2.C (f): Return a value.

From-SVN: r256032

	* g++.old-deja/g++.ext/namedret1.C (f): Return a value.

From-SVN: r256031

From-SVN: r256030

[gcc]
2017-12-28  Michael Meissner  <meissner@linux.vnet.ibm.com>

	* builtins.def: (_Float<N> and _Float<N>X BUILT_IN_CEIL): Add
	_Float<N> and _Float<N>X variants for rounding built-in
	functions.
	(_Float<N> and _Float<N>X BUILT_IN_FLOOR): Likewise.
	(_Float<N> and _Float<N>X BUILT_IN_NEARBYINT): Likewise.
	(_Float<N> and _Float<N>X BUILT_IN_RINT): Likewise.
	(_Float<N> and _Float<N>X BUILT_IN_ROUND): Likewise.
	(_Float<N> and _Float<N>X BUILT_IN_TRUNC): Likewise.
	* builtins.c (mathfn_built_in_2): Likewise.
	* internal-fn.def (CEIL): Likewise.
	(FLOOR): Likewise.
	(NEARBYINT): Likewise.
	(RINT): Likewise.
	(ROUND): Likewise.
	(TRUNC): Likewise.
	* convert.c (convert_to_integer_1): Likewise.
	* fold-const.c (tree_call_nonnegative_warnv_p): Likewise.
	(integer_valued_real_call_p): Likewise.
	* fold-const-call.c (fold_const_call_ss): Likewise.
	* gencfn-macros.c (print_case_cfn): Change CFN and operator
	printers to take a const char * suffix instead of a bool.
	(print_define_operator_list): Likewise.
	(fltall_suffixes): New list of suffixes, that include the
	traditional suffixes as well as all of the _Float<N> and
	_Float<N>X suffixes.
	(main): For _Float<N> and _Float<N>X functions, emit both
	<name>_FN and <name>_ALL variants.  The <macro>_FN variant only
	has the _Float<N> and _Float<N>X case names or operators.  The
	<name>_ALL variant has both the traditional and the
	_Float<N>/_Float<N>X case names or operators.
	* match.pd (COPYSIGN optimizations): Provide optimizations for
	_Float<N> and _Float<N>X types where possible.
	(MIN/MAX optimizations): Likewise.
	(sqrt optimizations): Likewise.
	(rounding optimizations): Likewise.

[gcc/c]
2017-12-28  Michael Meissner  <meissner@linux.vnet.ibm.com>

	* c-decl.c (header_for_builtin_fn): Add integer rounding _Float<N>
	and _Float<N>X built-in functions.

From-SVN: r256026