The issue here was that when processing the explicit template args in
fn_type_unification we added an empty argument pack for the parameter pack,
so we never tried to do any deduction for it, and therefore never looked at
its type.  We need that empty pack behavior for partial ordering, but we
don't want it here, so let's make it conditional on tf_partial.

	* pt.c (coerce_template_parms): Don't add an empty pack if
	tf_partial.
	(fn_type_unification): Pass tf_partial to coerce_template_parms.

From-SVN: r269965

2019-03-27  Richard Biener  <rguenther@suse.de>

	* gcc.dg/torture/20190327-1.c: New testcase.

From-SVN: r269964

2019-03-27  Paul Thomas  <pault@gcc.gnu.org>

	PR fortran/88247
	* expr.c (is_subref_array): Permit substrings to be detected
	as subref arrays.
	* trans-array.c (get_array_ctor_var_strlen): Obtain the length
	of deferred length strings. Handle substrings with a NULL end
	expression.
	(trans_array_constructor): Remove an unnecessary blank line.
	(gfc_conv_scalarized_array_ref): Skip to label 'done' if 'decl'
	is a pointer array.
	(get_array_charlen): If the expression is an array, convert the
	first element of the constructor and use its string length. Get
	a new charlen if necessary.
	(gfc_conv_expr_descriptor): Call 'get_array_charlen' for array
	constructor expressions. If the ss_info string length is
	available, use that to set the span of character arrays.
	* trans-expr.c (gfc_get_expr_charlen): Handle substrings
	* trans-stmt.c (trans_associate_var): Set the pointer array
	flag for variable targets and constant array constructors. Take
	care not to reset the string length or the span in the case of
	expressions that are not converted as direct by reference.

2019-03-27  Paul Thomas  <pault@gcc.gnu.org>

	PR fortran/88247
	* gfortran.dg/associate_47.f90: New test.

From-SVN: r269962

2019-03-27  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/89463
	* tree-ssa-dce.c (remove_dead_stmt): Take output vector to
	queue edges to remove.
	(eliminate_unnecessary_stmts): Remove dead PHIs alongside
	dead stmts.  Delay edge removal until PHIs are removed to
	make debug-stmt creation not confused by seemingly degenerate
	PHIs.

	* gcc.dg/guality/pr89463.c: New testcase.

From-SVN: r269961

	* config/rs6000/rs6000.h: Rename NON_SPECIAL_REGS to GEN_OR_FLOAT_REGS
	throughout file.
	* config/rs6000/darwin.h: Likewise.
	* config/rs6000/rs6000.c: Likewise.

From-SVN: r269960

	* config/rs6000/rs6000.c (rs6000_init_hard_regno_mode_ok): Always
	assign rs6000_hard_regno_mode_ok_p[m][r].  Formatting.

From-SVN: r269959

From-SVN: r269958

	* config/riscv/generic.md (generic_alu, generic_load, generic_store)
	(generic_xfer, generic_branch, generic_imul, generic_idivsi)
	(generic_idivdi, generic_fmul_single, generic_fmul_double)
	(generic_fdiv, generic_fsqrt): Add check for generic tune.
	(generic_alu): Add auipc to type list.
	* config/riscv/riscv-opts.h (enum riscv_microarchitecture_type): New.
	(riscv_microarchitecture): Declare.
	* config/riscv/riscv-protos.h (riscv_store_data_bypass_p): Declare.
	* config/riscv/riscv.c (struct riscv_cpu_info): Add microarchitecture
	field.
	(riscv_microarchitecture): New.
	(sifive_7_tune_info): New.
	(riscv_cpu_info_table): Add microarchitecture value for rocket and
	size.  Add sifive-3-series, sifive-5-series, and sifive-7-series
	entries.
	(riscv_store_data_bypass_p): New.
	(riscv_option_override): Set riscv_microarchitecture from
	cpu->microarchitecture.
	* config/riscv/riscv.md: Include sifive-7.md.
	(type): Add auipc.
	(tune): New.
	(auipc<mode>): Change type to auipc.
	(restore_stack_nonlocal): New.
	* config/riscv/sifive-7.md: New.
	* doc/invoke.texi (RISC-V Options): Update mtune docs.

Co-Authored-By: Jim Wilson <jimw@sifive.com>

From-SVN: r269954

	PR target/89827
	* config/i386/i386.c (dimode_scalar_chain::convert_reg):
	Also process XEXP (src, 0) of a shift insn.

testsuite/ChangeLog:

	PR target/89827
	* gcc.target/i386/pr89827.c: New test.

From-SVN: r269953

	* g++.dg/abi/lambda-static-1.C: Handle Solaris as comdat group
	syntax.

From-SVN: r269952

When we refer to a captured variable from a constant-expression context
inside a lambda, the closure (like any function parameter) is not constant
because we aren't in a call, so we don't have an argument.  So the capture
is non-constant.  But if the captured variable is constant, we might be able
to use it directly in constexpr evaluation.

	PR c++/82643
	PR c++/87327
	* constexpr.c (cxx_eval_constant_expression): In a lambda function,
	try evaluating the captured variable directly.

From-SVN: r269951

The static assertions added for PR libstdc++/48101 were at class scope
and so were evaluated too eagerly, when it might not be possible to
determine whether the function objects are invocable with the key types.
The problematic cases are where the key type is not known to be
convertible to the argument type(s) of the function object until later,
after a type has been completed. Specifically, if the key type is a
pointer to a derived class and the function object's argument type is a
pointer to a base class, then the derived-to-base conversion is only
valid once the derived type is complete.

By moving the static assertions to the destructor they will only be
evaluated when the destructor is instantiated, at which point whether
the key type can be passed to the function object should be knowable.
The ideal place to do the checks would be only when the function objects
are actually invoked, but that would mean adding the checks in numerous
places, so the destructor is used instead.

The tests need to be adjusted because the "required from here" line is
now the location of the destructor, not the point of instantiation in
the test file. For the map and multimap tests which check two
specializations, the dg-error matching the assertion text matches both
cases. Also check the diagnostic output for the template arguments, to
ensure both specializations trigger the assertion.

	PR libstdc++/85965
	* include/bits/hashtable.h (_Hashtable): Move static assertions to
	destructor so they are not evaluated until the _Key type is complete.
	* include/bits/stl_tree.h (_Rb_tree): Likewise.
	* testsuite/23_containers/set/85965.cc: New test.
	* testsuite/23_containers/unordered_set/85965.cc: New test.
	* testsuite/23_containers/map/48101_neg.cc: Replace "here" errors
	with regexp matching the corresponding _Rb_tree specialization.
	* testsuite/23_containers/multimap/48101_neg.cc: Likewise.
	* testsuite/23_containers/multiset/48101_neg.cc: Remove "here" error.
	* testsuite/23_containers/set/48101_neg.cc: Likewise.
	* testsuite/23_containers/unordered_map/48101_neg.cc: Likewise.
	* testsuite/23_containers/unordered_multimap/48101_neg.cc: Likewise.
	* testsuite/23_containers/unordered_multiset/48101_neg.cc: Likewise.
	* testsuite/23_containers/unordered_set/48101_neg.cc: Likewise.

From-SVN: r269949

Merges upstream druntime b9564bef.

Reviewed-on: https://github.com/dlang/druntime/pull/2512

libphobos/ChangeLog:

2019-03-26  Iain Buclaw  <ibuclaw@gdcproject.org>

	* libdruntime/Makefile.am (DRUNTIME_DSOURCES_DARWIN): Add
	core/sys/darwin/crt_externs.d.
	(DRUNTIME_DSOURCES_FREEBSD): Add core/sys/freebsd/unistd.d.
	(DRUNTIME_DSOURCES_POSIX): Add core/sys/posix/spawn.d.
	* libdruntime/Makefile.in: Regenerate.

From-SVN: r269948

re PR libstdc++/89825 (Jump table for variant visitation could be shortened for never empty variants)

PR libstdc++/89825

Fix based on a suggestion by Antony Polukhin.
* include/std/variant (_Extra_visit_slot_needed): New.
(_Multi_array): Use it.
(_S_apply_all_alts): Likewise.

From-SVN: r269947

2019-03-26  Richard Biener  <rguenther@suse.de>

	* tree-inline.c (remap_gimple_stmt): Cache gimple_block.
	(copy_debug_stmt): Likewise.
	(expand_call_inline): Likewise.
	(copy_bb): Avoid redundant lookup & set of gimple_block.
	* gimple-low.c (lower_gimple_return): Likewise.
	(lower_builtin_setjmp): Likewise.

From-SVN: r269946

Fixes memory leak in the front-end symbol mangler, and introduces
recognition and rejection of a few more C types and directives.

Reviewed-on: https://github.com/dlang/dmd/pull/9492

From-SVN: r269945

	* hash-table.h (hash_table::m_gather_mem_stats): If GATHER_STATISTICS
	is constant 0, turn into static const data member initialized to false.
	(hash_table::hash_table): Only initialize m_gather_mem_stats #if
	GATHER_STATISTICS.  Add ATTRIBUTE_UNUSED to gather_mem_stats param.

From-SVN: r269944

	* mem-stats.h (mem_alloc_description::unregister_descriptor): New
	method.
	(mem_alloc_description::release_object_overhead): Fix comment typos.
	* hash-table.h (hash_table::~hash_table): Call
	release_instance_overhead only if m_entries is non-NULL, otherwise
	call unregister_descriptor.

Co-Authored-By: Jakub Jelinek <jakub@redhat.com>

From-SVN: r269943

PR libstdc++/89824

Fix based on a suggestion by Antony Polukhin.
* include/std/variant (__gen_vtable): Don't reserve an
additional table slot, _Multi_array already does that.

From-SVN: r269941

PR libstdc++/89816

Fix based on a suggestion by Antony Polukhin.
* include/std/variant (__variant_construct): Capture a pointer
to the storage and visit just one variant.

From-SVN: r269940

re PR tree-optimization/81740 (wrong code at -O3 in both 32-bit and 64-bit modes on x86_64-linux-gnu)

2019-03-26  Bin Cheng  <bin.cheng@linux.alibaba.com>

	PR tree-optimization/81740
	* tree-vect-data-refs.c (vect_analyze_data_ref_dependence):
	In case of outer loop vectorization, check for backward dependence
	at the inner loop if outer loop dependence is reversed.

	* gcc.dg/vect/pr81740-1.c: New testcase.
	* gcc.dg/vect/pr81740-2.c: Likewise.

From-SVN: r269938

gcc/testsuite/ChangeLog:

2019-03-26  Iain Buclaw  <ibuclaw@gdcproject.org>

	* gdc.test/gdc-test.exp (gdc-do-test): Sort and remove duplicate
	options in permute args tests.

From-SVN: r269937

2019-03-26  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/84598
	* g++.dg/ext/pr84598.C: New.

From-SVN: r269936

From-SVN: r269935

2019-03-26  Martin Liska  <mliska@suse.cz>

	* lto-symtab.c (lto_symtab_merge_decls_2): Fix option name
	wrapping

From-SVN: r269934

	PR c++/89796
	* semantics.c (finish_omp_atomic): Add warning_sentinel for
	-Wunused-value around finish_expr_stmt call.

	* g++.dg/gomp/pr89796.C: New test.
	* gcc.dg/gomp/pr89796.c: New test.

From-SVN: r269933

	* config/rs6000/rs6000.c (rs6000_init_hard_regno_mode_ok): Correct
	rs6000_vector_mem init.  Correct wI and wJ comment

From-SVN: r269932

From-SVN: r269931

	PR rtl-optimization/88347
	PR rtl-optimization/88423
	* sched-deps.c (sched_analyze_insn): Take into account that for
	tablejumps the barrier appears after a label and a jump_table_data.

	* gcc.c-torture/compile/pr88347.c: New test.
	* gcc.c-torture/compile/pr88423.c: New test.

From-SVN: r269928

gcc/c-family/ChangeLog:

	PR c/89812
	* c-common.c (check_user_alignment): Rename local.  Correct maximum
	alignment in diagnostic.  Avoid assuming argument fits in SHWI,
	convert it to UHWI when it fits.

gcc/testsuite/ChangeLog:

	PR c/89812
	* gcc.dg/attr-aligned-3.c: New test.

From-SVN: r269927

	* be.po, da.po, de.po, el.po, es.po, fi.po, fr.po, hr.po, id.po,
	ja.po, nl.po, ru.po, sr.po, sv.po, tr.po, uk.po, vi.po, zh_CN.po,
	zh_TW.po: Update.

From-SVN: r269926

	PR debug/86964
	* dwarf2out.c (premark_used_variables): New function.
	(prune_unused_types_walk): Do not mark not premarked external
	variables.
	(prune_unused_types): Call premark_used_variables.

	* gcc.dg/debug/dwarf2/pr86964.c: New testcase.

From-SVN: r269925

2019-03-25  Vladimir Makarov  <vmakarov@redhat.com>

	PR rtl-optimization/89676
	* lra-constraints.c (curr_insn_transform): Do match reload for
	early clobbers when the match was successful only for different
	registers.

From-SVN: r269924

/cp
2019-03-25  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/84661
	PR c++/85013
	* parser.c (cp_parser_binary_expression): Don't call cp_fully_fold
	to undo the disabling of warnings.

/testsuite
2019-03-25  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/84661
	PR c++/85013
	* g++.dg/concepts/pr84661.C: New.
	* g++.dg/torture/pr85013.C: Likewise.

From-SVN: r269923

This issue is similar to PR 87480; in both cases we were doing non-dependent
substitution with processing_template_decl set, leading to member access
expressions seeming still instantiation-dependent, and therefore decltype
not being simplified to its actual type.  And as in that PR, the fix is to
clear processing_template_decl while substituting a default template
argument.

	* pt.c (most_specialized_partial_spec): Clear
	processing_template_decl.

From-SVN: r269921

gcc/ChangeLog:
	* doc/extend.texi (Common Type Attributes): Document vector_size.
	(Common Variable Attributes): Mention size constraint.  Correct
	quoting and typos.
	(Vector Extensions): Use @dfn when defining bas type.  Clarify
	base type and size constraints.

From-SVN: r269920

	* typeck2.c (digest_init_r): Warn about object slicing instead of
	crashing.

	* g++.dg/cpp1z/aggr-base8.C: New test.
	* g++.dg/cpp1z/aggr-base9.C: New test.

From-SVN: r269919

	* call.c (reference_binding): If the result of the conversion function
	is a prvalue of non-class type, use the cv-unqualified type.

	* g++.dg/cpp0x/rv-conv2.C: New test.

From-SVN: r269918

2019-03-25  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/89789
	* tree-ssa-sccvn.c (set_ssa_val_to): Do not allow lattice
	changes from non-undefined back to undefined.

	* gcc.dg/torture/pr89789.c: New testcase.

From-SVN: r269917

2019-03-25  Thomas Otto  <thomas.otto@pdv-fs.de>

	* dwarf2out.c (comp_dir_string): cached_wd could be set to both a
	heap string and a gc string, but since this variable is unknown to
	ggc the gc string might get reused and corrupted. Fixed by always
	using a heap string.

From-SVN: r269916