If we get errors during compilation, we skip the escape analysis pass.
    If we are compiling the runtime package, we report an error if a bound
    method expression escapes.  The effect is that if we get an error
    while compiling the runtime package, we would report confusing and
    meaningless errors about bound method expressions escaping.
    
    This CL stops doing that.
    
    Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/192720

From-SVN: r275238

    
    Avoids problems with arm64 ILP32 mode.  We might want to handle that
    mode better in general, but always building panic32.go is simple and
    fixes the build.
    
    Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/192723

From-SVN: r275237

2019-08-30  Steven G. Kargl  <kargl@gcc.gnu.org>

	PR fortran/91587
	* io.c (match_filepos): MATCH_ERROR should branch to a syntax error.

2019-08-30  Steven G. Kargl  <kargl@gcc.gnu.org>

	PR fortran/91587
	* gfortran.dg/pr91587.f90: New test.

From-SVN: r275236

From-SVN: r275235

This was noticed while trying to test -msave-restore support.  The
save/restore routines use the alternate return register t0/x5 which is
clobbered by the PLT header, so we can't use them in shared libraries.
This patch disables -msave-restore when -fpic (and -mplt), and emits a
warning if the user explicitly turned on -msave-restore.

	gcc/
	* config/riscv/riscv.c (riscv_option_override): If -msave-restore
	and -fpic and -mplt then disable -msave-restore and warn.

From-SVN: r275231

    
    Permit putting structs with anonymous and empty fields in the C header
    file runtime.inc that is used to build the C runtime code.  This is
    required for upcoming 1.13 support, as the m struct has picked up an
    anonymous field.
    
    Doing this lets the C header contain all the type descriptor structs,
    so start using those in the C code.  This cuts the number of copies of
    type descriptor definitions from 3 to 2.
    
    Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/192343

From-SVN: r275227

From-SVN: r275223

gcc/ChangeLog:

	PR middle-end/91599
	* tree-ssa-strlen.c (handle_store): Use a fallback location if
	the statement doesn't have one.
	* gimple-pretty-print.c (percent_G_format): Same.

gcc/testsuite/ChangeLog:

	PR middle-end/91599
	* gcc.dg/Wstringop-overflow-16.c: New test.

From-SVN: r275211

gcc/ChangeLog:

	PR middle-end/91584
	* tree-vrp.c (vrp_prop::check_mem_ref): Normalize type domain bounds
	before using them to validate MEM_REF offset.

gcc/testsuite/ChangeLog:
	* gfortran.dg/char_array_constructor_4.f90: New test.

From-SVN: r275210

Bunch of micro optimizations for std::to_chars:
* For base == 8 replacing the lookup in __digits table with arithmetic
computations leads to a same CPU cycles for a loop (exchanges two movzx
with 3 bit ops). However this saves 129 bytes of data and totally avoids
a chance of cache misses on __digits.
* For base == 16 replacing the lookup in __digits table with
arithmetic computations leads to a few additional instructions, but
totally avoids a chance of cache misses on __digits (- ~9 cache misses
for worst case) and saves 513 bytes of const data.
* Replacing __first[pos] and __first[pos - 1] with __first[1] and
__first[0] on final iterations saves ~2% of code size.
* Removing trailing '\0' from arrays of digits allows the linker to
merge the symbols (so that "0123456789abcdefghijklmnopqrstuvwxyz" and
"0123456789abcdef" could share the same address). This improves data
locality and reduces binary sizes.
* Using __detail::__to_chars_len_2 instead of a generic
__detail::__to_chars_len makes the operation O(1) instead of O(N). It
also makes the code two times shorter.

In sum: this significantly reduces the size of a binary (for about 4KBs
only for base-8 conversion), deals with latency (CPU cache misses)
without changing the iterations count and without adding costly
instructions into the loops.

2019-08-30  Antony Polukhin  <antoshkka@gmail.com>

	* include/std/charconv (__detail::__to_chars_8)
	__detail::__to_chars_16): Replace array of precomputed digits with
	arithmetic operations to avoid CPU cache misses. Remove zero
	termination from array of digits to allow symbol merge with generic
	implementation of __detail::__to_chars. Replace final offsets with
	constants. Use __detail::__to_chars_len_2 instead of a generic
	__detail::__to_chars_len.
	(__detail::__to_chars): Remove zero termination from array of digits.
	(__detail::__to_chars_2): Leading digit is always '1'.

From-SVN: r275205

	* testsuite/23_containers/vector/cons/89164_c++17.cc: Fix errors.

From-SVN: r275204

	* gcc-interface/decl.c (maybe_saturate_size): New function.
	(gnat_to_gnu_entity): Invoke it on the Esize of types before sending
	it for back-annotations.
	* gcc-interface/trans.c: Fix typo.

From-SVN: r275200

	* config/abi/post/alpha-linux-gnu/baseline_symbols.txt: Update.

From-SVN: r275199

	* gcc-interface/ada-tree.h (DECL_FORCED_BY_REF_P): New macro.
	* gcc-interface/decl.c (gnat_to_gnu_param): Set it on parameters
	whose mechanism was forced to by-reference.
	* gcc-interface/trans.c (Call_to_gnu): Do not issue a warning about a
	misaligned actual parameter if it is based on a CONSTRUCTOR.  Remove
 	obsolete warning for users of Starlet.  Issue a warning if a temporary
	is make around the call for a parameter with DECL_FORCED_BY_REF_P set.
	(addressable_p): Return true for REAL_CST and ADDR_EXPR.

From-SVN: r275198

	* gcc-interface/trans.c (gnat_to_gnu): Do not set the location on an
	expression used for a tag.

From-SVN: r275197

	* gcc-interface/gigi.h (aggregate_type_contains_array_p): Declare.
	* gcc-interface/decl.c (gnat_to_gnu_entity) <E_Record_Type>: For an
	extension, test Has_Record_Rep_Clause instead of Has_Specified_Layout.
	(adjust_packed): Return 0 if the type of the field is an aggregate
	type that contains (or is) a self-referential array.
	(type_has_variable_size): Delete.
	* gcc-interface/utils.c (inish_record_type): Constify a variable.
	(aggregate_type_contains_array_p): Add parameter SELF_REFERENTIAL.
	<RECORD_TYPE>: Pass it in the recursive call.
	<ARRAY_TYPE>: If it is true, return true only if the array type is
	self-referential.
	(create_field_decl): Streamline the setting of the alignment on the
	field.  Pass false to aggregate_type_contains_array_p.

From-SVN: r275196

From-SVN: r275195

	* gcc-interface/trans.c (lvalue_required_p) <N_Slice>: Adjust GNU_TYPE
	in the recursive call.
	<N_Selected_Component>: Likewise.

From-SVN: r275191

utils.c (build_template): Deal with parameters passed by pointer to component of multi-dimensional arrays.

	* gcc-interface/utils.c (build_template): Deal with parameters
	passed by pointer to component of multi-dimensional arrays.

From-SVN: r275190

	* gcc-interface/decl.c (annotate_value) <CALL_EXPR>: Inline the call
	also if List_Representation_Info is greater than 3.

From-SVN: r275188

From-SVN: r275187

From-SVN: r275178

The memmove optimizations for std::uninitialized_copy/fill/_n will
compile even if the type is not copy constructible, because std::copy
doesn't require copy construction to work. But the uninitialized
algorithms do require it.

This adds explicit static assertions to ensure we don't allow ill-formed
initializations.

	PR libstdc++/89164
	* include/bits/stl_algobase.h (__copy_move): Give descriptive names
	to template parameters.
	* include/bits/stl_uninitialized.h (uninitialized_copy)
	(uninitialized_fill, uninitialized_fill_n): Add static assertions to
	diagnose invalid uses.
	* testsuite/20_util/specialized_algorithms/uninitialized_copy/1.cc:
	Adjust expected error.
	* testsuite/20_util/specialized_algorithms/uninitialized_copy/89164.cc:
	New test.
	* testsuite/20_util/specialized_algorithms/uninitialized_copy_n/
	89164.cc: New test.
	* testsuite/20_util/specialized_algorithms/uninitialized_fill/89164.cc:
	New test.
	* testsuite/20_util/specialized_algorithms/uninitialized_fill_n/
	89164.cc: New test.
	* testsuite/23_containers/vector/cons/89164.cc: New test.
	* testsuite/23_containers/vector/cons/89164_c++17.cc: New test.

From-SVN: r275177

	* gcc-interface/gigi.h (gigi_checking_assert): New macro.
	* gcc-interface/decl.c (gnat_to_gnu_entity) <E_Modular_Integer_Type>:
	Remove redundant test and adjust comments.  Minor tweaks.
	* gcc-interface/trans.c (Call_to_gnu): Do not generate range checks,
	instead assert that the Do_Range_Check flag is not set.  Adjust call
	to convert_with_check.
	(gnat_to_gnu): Likewise.
	(assoc_to_constructor): Likewise.
	(pos_to_constructor): Likewise.  Remove GNAT_COMPONENT_TYPE parameter.
	(emit_range_check): Delete.
	(convert_with_check): Remove RANGE_P parameter and adjust.  Do a single
	overflow check for modular types.

From-SVN: r275174

2019-08-30  Bernd Edlinger  <bernd.edlinger@hotmail.de>

        * config/arm/arm.md (unaligned_loaddi,
        unaligned_storedi): New unspec insn patterns.
        * config/arm/neon.md (unaligned_storev8qi): Likewise.
        * config/arm/arm.c (gen_cpymem_ldrd_strd): Use unaligned_loaddi
        and unaligned_storedi for 4-byte aligned memory.
        (arm_block_set_aligned_vect): Use unaligned_storev8qi for
        4-byte aligned memory.

From-SVN: r275063

2019-08-30  Martin Jambor  <mjambor@suse.cz>

	tree-optimization/91579
	* tree-tailcall.c (tailr_arg_needs_copy): New variable.
	(find_tail_calls): Allocate tailr_arg_needs_copy and set its bits as
	appropriate.
	(arg_needs_copy_p): Removed.
	(eliminate_tail_call): Test tailr_arg_needs_copy instead of calling
	arg_needs_copy_p.
	(tree_optimize_tail_calls_1): Likewise.  Free tailr_arg_needs_copy.

	testsuite/
	* gcc.dg/tree-ssa/pr91579.c: New test.

From-SVN: r275062

From-SVN: r275059

	(general_scalar_chain::compute_convert_gain):
	Correct cost for double-word shifts.
	(general_scalar_to_vector_candidate_p): Reject count operands
	greater or equal to mode bitsize.

From-SVN: r275055

i386.c (inline_secondary_memory_needed): Return true for moves between SSE and non-general registers and between mask...

	* config/i386/i386.c (inline_secondary_memory_needed): Return true
	for moves between SSE and non-general registers and between
	mask and non-general registers.
	(ix86_register_move_cost): Remove stalled comment.

From-SVN: r275050

From-SVN: r275049

https://gcc.gnu.org/ml/gcc-patches/2019-08/msg01971.html
	* internal.h (enum include_type): Add IT_MAIN, IT_DIRECTIVE_HWM,
	IT_HEADER_HWM.
	(_cpp_stack_file): Take include_type, not a bool.
	* files.c (_cpp_find_file): Refactor to not hide an if inside a
	for conditional.
	(should_stack_file): Break apart to ...
	(is_known_idempotent_file, has_unique_contents): ... these.
	(_cpp_stack_file): Replace IMPORT boolean with include_type enum.
	Refactor to use new predicates.  Do linemap compensation here ...
	(_cpp_stack_include): ... not here.
	* init.c (cpp_read_main_file): Pass IT_MAIN to _cpp_stack_file.

From-SVN: r275034

	PR libstdc++/91067
	* acinclude.m4 (libtool_VERSION): Bump to 6:28:0.
	* configure: Regenerate.
	* config/abi/pre/gnu.ver (GLIBCXX_3.4.28): Add new version. Export
	missing symbols.
	* testsuite/27_io/filesystem/iterators/91067.cc: Test move
	constructors.
	* testsuite/util/testsuite_abi.cc: Add new symbol version.

From-SVN: r275032

i386-features.c (general_scalar_chain::convert_insn): Guard debug work with MAY_HAVE_DEBUG_BIND_INSNS.

2019-08-29  Richard Biener  <rguenther@suse.de>

	* config/i386/i386-features.c (general_scalar_chain::convert_insn):
	Guard debug work with MAY_HAVE_DEBUG_BIND_INSNS.

From-SVN: r275031

2019-08-29  Richard Biener  <rguenther@suse.de>

	PR bootstrap/91580
	* config/i386/i386-features.c (general_scalar_chain::convert_insn):
	Do not emit scalar copies for debug-insns, instead replace
	their uses with the reg copy used in the chain or reset them
	if there is a reaching definition outside of the chain as well.

From-SVN: r275030

	* config/abi/post/aarch64-linux-gnu/baseline_symbols.txt: Update.
	* config/abi/post/s390x-linux-gnu/baseline_symbols.txt: Update.

From-SVN: r275028

	PR target/91560
	* config/i386/i386-expand.c (expand_vec_perm_movs,
	expand_vec_perm_blend, expand_vec_perm_vpermil,
	expand_vec_perm_pshufb, expand_vec_perm_1,
	expand_vec_perm_pshuflw_pshufhw, expand_vec_perm_palignr,
	expand_vec_perm_interleave2, expand_vec_perm_vpermq_perm_1,
	expand_vec_perm_vperm2f128, expand_vec_perm_interleave3,
	expand_vec_perm_vperm2f128_vblend, expand_vec_perm_2vperm2f128_vshuf,
	expand_vec_perm_even_odd, expand_vec_perm_broadcast): Adjust function
	comments - replace ix86_expand_vec_perm_builtin_1 with
	ix86_expand_vec_perm_const_1.
	(expand_vec_perm2_vperm2f128_vblend): New function.
	(ix86_expand_vec_perm_const_1): New forward declaration.  Call
	expand_vec_perm2_vperm2f128_vblend as last resort.
	(canonicalize_perm): Formatting fix.

	* gcc.dg/torture/vshuf-8.inc: Add two further permutations.

From-SVN: r275027

	PR tree-optimization/91351
	* tree-cfg.c (generate_range_test): Use range_check_type instead of
	unsigned_type_for.
	* tree-cfgcleanup.c (convert_single_case_switch): Punt if
	range_check_type returns NULL.
	* tree-switch-conversion.c (switch_conversion::build_one_array):
	Use range_check_type instead of unsigned_type_for, don't perform
	linear opt if it returns NULL.
	(bit_test_cluster::find_bit_tests): Formatting fix.
	(bit_test_cluster::emit): Use range_check_type instead of
	unsigned_type_for.
	(switch_decision_tree::try_switch_expansion): Punt if range_check_type
	returns NULL.

	* g++.dg/opt/pr91351.C: New test.

From-SVN: r275026

/cp
2019-08-29  Paolo Carlini  <paolo.carlini@oracle.com>

	* decl.c (check_var_type): Add location_t parameter and use it.
	(grokdeclarator): Adjust call.
	* pt.c (tsubst_decl): Likewise.
	* cp-tree.h: Adjust declaration.

/testsuite
2019-08-29  Paolo Carlini  <paolo.carlini@oracle.com>

	* g++.dg/spellcheck-typenames.C: Adjust expected locations.
	* g++.dg/cpp0x/pr84676.C: Check locations.
	* g++.dg/other/pr88187.C: Likewise.
	* g++.dg/parse/crash13.C: Likewise.
	* g++.dg/parse/crash46.C: Likewise.
	* g++.dg/parse/template28.C: Likewise.
	* g++.dg/parse/typename4.C: Likewise.

From-SVN: r275025

re PR tree-optimization/91568 (internal compiler error: in vect_schedule_slp_instance, at tree-vect-slp.c:3922)

2019-08-29  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/91568
	* tree-vectorizer.h (_slp_tree::max_nunits): Add.
	(vect_update_max_nunits): Add overload for poly_uint64.
	* tree-vect-slp.c (vect_create_new_slp_node): Initialize it.
	(vect_build_slp_tree): Record max_nunits into the subtree
	and merge it upwards.
	(vect_print_slp_tree): Print max_nunits.

	* gfortran.dg/pr91568.f: New testcase.

From-SVN: r275023

	PR c++/91361
	* c-opts.c (c_common_post_options): Enable -Wvolatile by
	default for C++2a, unless -Wno-deprecated.
	* c.opt (Wvolatile): New warning.

	* cp-gimplify.c (cp_fold): Set TREE_THIS_VOLATILE.
	* decl.c (grokdeclarator): Warn about a volatile-qualified structured
	binding and return type.
	(grokparms): Warn about a volatile-qualified function parameter.
	* expr.c (mark_use) <case MODIFY_EXPR>: Emit a -Wvolatile warning.
	* typeck.c (cp_build_unary_op): Emit a -Wvolatile warning for pre and
	post ++/-- on a volatile operand.
	(genericize_compound_lvalue): Use a better location.  Don't lose
	TREE_THIS_VOLATILE.
	(cp_build_modify_expr): Emit a -Wvolatile warning for a compound
	assignment whose LHS is volatile-qualified.  Build the assignment with
	a more precise location.

	* doc/invoke.texi: Document -Wvolatile.

	* c-c++-common/Wbool-operation-1.c: Use -Wno-volatile in C++.
	* c-c++-common/gomp/atomic-1.c: Likewise.
	* c-c++-common/gomp/atomic-9.c: Likewise.
	* c-c++-common/gomp/depend-iterator-1.c: Likewise.
	* c-c++-common/gomp/loop-1.c: Adjust warning location for C++.
	* c-c++-common/gomp/order-3.c: Likewise.
	* c-c++-common/pr69733.c: Use -Wno-volatile in C++.
	* c-c++-common/spec-barrier-2.c: Likewise.
	* c-c++-common/tm/pr54893.c: Likewise.
	* g++.dg/cpp0x/pr65327.C: Add dg-warning.
	* g++.dg/cpp0x/rv-conv2.C: Likewise.
	* g++.dg/cpp0x/rv1n.C: Likewise.
	* g++.dg/cpp0x/rv1p.C: Likewise.
	* g++.dg/cpp0x/rv2n.C: Likewise.
	* g++.dg/cpp0x/rv2p.C: Likewise.
	* g++.dg/cpp0x/rv3n.C: Likewise.
	* g++.dg/cpp0x/rv3p.C: Likewise.
	* g++.dg/cpp0x/rv4n.C: Likewise.
	* g++.dg/cpp0x/rv4p.C: Likewise.
	* g++.dg/cpp0x/rv5n.C: Likewise.
	* g++.dg/cpp0x/rv5p.C: Likewise.
	* g++.dg/cpp0x/rv6n.C: Likewise.
	* g++.dg/cpp0x/rv6p.C: Likewise.
	* g++.dg/cpp0x/rv7n.C: Likewise.
	* g++.dg/cpp0x/rv7p.C: Likewise.
	* g++.dg/cpp0x/rv8p.C: Likewise.
	* g++.dg/cpp0x/trailing14.C: Use -Wno-volatile.
	* g++.dg/cpp1y/new1.C: Add dg-warning.
	* g++.dg/cpp2a/volatile1.C: New test.
	* g++.dg/cpp2a/volatile2.C: New test.
	* g++.dg/cpp2a/volatile3.C: New test.
	* g++.dg/cpp2a/volatile4.C: New test.
	* g++.dg/expr/bool3.C: Add dg-warning.
	* g++.dg/expr/bool4.C: Likewise.
	* g++.dg/expr/cond9.C: Likewise.
	* g++.dg/ext/vector25.C: Likewise.
	* g++.dg/gomp/depend-iterator-1.C: Use -Wno-volatile.
	* g++.dg/inherit/covariant21.C: Add dg-warning.
	* g++.dg/init/ref18.C: Likewise.
	* g++.dg/ipa/pr63838.C: Likewise.
	* g++.dg/overload/rvalue2.C: Likewise.
	* g++.dg/parse/semicolon4.C: Likewise.
	* g++.dg/warn/Wreturn-type-4.C: Likewise.
	* g++.dg/warn/pr36069.C: Likewise.
	* g++.old-deja/g++.mike/p9506.C: Likewise.
	* g++.old-deja/g++.other/volatile1.C: Likewise.

From-SVN: r275022