If you create a toolchain with the target alphaev68-unknown-linux-gnu, gcc
will use the -mcpu=ev67 by default when compiling.  Some software packages
(like gmp) will use this target info to decide that it may freely use
assembly code that targets ev67+.  The trouble comes in when trying to
compile that pure assembly code.

While gcc will use -mcpu=ev67 just fine, it will invoke gas without an
-mev67 option, so the assembler will default to the lowest common
denominator -- ev4 in this case.  Inline assembly in C code is normally
just peachy because gcc's assembler output will start with ".arch <cpu>"
and the assembler will accept that.  But if the hand coded assembly code
lacks that .arch, you easily end up with errors like so:
	opcode `cttz' not supported for target <all>

While the assembly code could/should be fixed to explicitly output the
.arch directive, I think it's reasonable to expect this to work:
	echo 'cttz $20,$21' | gcc -x assembler -c - -o /dev/null -mcpu=ev67

This simple patch implements that, although I guess it is a bit redundant
in the default case where gcc outputs .arch.  Perhaps that should all be
punted in favor of a specs-only approach.  Considering gas respects .arch
in the code over the command line, it should also make things more natural.
The command line is processed in the standard/expected way -- gcc defaults
the -m option while user's custom -mcpu/-Wa,-m options come after, and the
guy writing the assembly code is free to use .arch to override everything
else.

From-SVN: r223888

	* gcc.dg/alias-8.c: Fix dg-warning.

From-SVN: r223887

	* include/bits/stl_algobase.h (__equal<true>::equal): Check length
	instead of checking for null pointers.
	(__lexicographical_compare<true>::__lc): Only check shorter length.

From-SVN: r223886

* expmed.c (extract_bit_field_1): Avoid clobbering a
yet-to-be-used base/index register.

From-SVN: r223885

contrib/
	* gimple.vim: New file.

From-SVN: r223884

	* alias.c (alias_set_entry_d): Add is_pointer and has_pointer.
	(alias_stats): Add num_universal.
	(alias_set_subset_of): Special case pointers; be ready for NULL
	children.
	(alias_sets_conflict_p): Special case pointers; be ready for NULL
	children.
	(init_alias_set_entry): Break out from ...
	(record_alias_subset): ... here; propagate new fields;
	allocate children only when really needed.
	(get_alias_set): Do less generous pointer globbing.
	(dump_alias_stats_in_alias_c): Update statistics.
	* gcc.dg/alias-8.c: Do not xfail.
	* gcc.dg/pr62167.c: Prevent FRE.
	* gcc.dg/alias-14.c: New testcase.

From-SVN: r223883

From-SVN: r223882

	* config/rs6000/rs6000.c (split_stack_arg_pointer_used_p): Scan
	correct block for use of r12.
	(rs6000_expand_split_stack_prologue): Error on r29 asm global reg.

From-SVN: r223878

	* include/debug/debug.h (_GLIBCXX_DEBUG_ASSERT,
	_GLIBCXX_DEBUG_PEDASSERT, _GLIBCXX_DEBUG_ONLY): Move definition...
	* include/debug/assertions.h: ...here, new.
	* include/debug/formatter.h
	(_Error_formatter::_Is_iterator_value_type): New.
	(_Error_formatter::_Is_instance): New.
	(_Error_formatter::_Parameter): Make public and not friend anymore.
	(_Error_formatter::_Parameter::__instance): New _M_kind enum entry.
	(_Error_formatter::_Parameter::__iterator_value_type): New _M_kind enum
	entry.
	(_Error_formatter::_Parameter::_Type): New.
	(_Error_formatter::_Parameter::_Instance): New, inherit from
	latter.
	(union _Error_formatter::_Parameter::_M_variant): Reorganize.
	(_Parameter(_Iterator const&, const char*, _Is_iterator)): Make all
	overloads take iterator through a const reference.
	(_Parameter(const _Iterator&, const char*, _Is_iterator_value_type)):
	New.
	(_Parameter(const _Type&, const char*, _Is_instance)): New.
	(_Error_formatter::_M_print_type): Delete.
	(_Error_formatter::_M_iterator_value_type): New.
	(_Error_formatter::_M_instance): New.
	* include/Makefile.am: Add new above debug file.
	* include/Makefile.in: Regenerate.
	* include/debug/functions.h
	(__check_dereferenceable(const _Safe_iterator<>&),
	__valid_range(const _Safe_iterator<>&),
	__is_safe_random_iterator<_Safe_iterator<>>): Move...
	* include/debug/safe_iterator.h: ... here.
	Replace debug.h include with assertions.h.
	(__check_singular_aux): Move...
	* include/debug/safe_base.h: ... here.
	* include/debug/functions.h
	(__check_dereferenceable(const _Safe_local_iterator<>&),
	__valid_range(const _Safe_local_iterator<>&): Move...
	* include/debug/safe_local_iterator.h: ...here.
	* include/debug/safe_sequence.h: Replace debug.h with assertions.h.
	Remove _Safe_iterator declaration.
	* include/debug/safe_unordered_container.h: Replace debug.h with
	assertions.h.
	* include/debug/array: Replace safe_sequence.h include with
	formatter.h and macros.h.
	* include/debug/deque: Include functions.tcc.
	* include/debug/forward_list: Likewise.
	* include/debug/list: Likewise.
	* include/debug/string: Likewise.
	* include/debug/vector: Likewise.
	* include/bits/unique_ptr.h: Replace debug.h include with new
	assertions.h.
	* include/bits/stl_iterator_base_funcs.h: Likewise.
	* testsuite/23_containers/array/tuple_interface/get_debug_neg.cc:
	Adjust dg-error line number.
	* testsuite/23_containers/array/tuple_interface/
	tuple_element_debug_neg.cc: Likewise.
	* src/c++11/debug.cc: Adapt.

From-SVN: r223877

2015-05-29  Christophe Lyon  <christophe.lyon@linaro.org>

	* gcc.target/arm/simd/vextp64_1.c: Close comment on final line.

From-SVN: r223876

From-SVN: r223873

	* doc/xml/manual/status_cxx2017.xml: Fix duplicate ID attribute.
	* doc/html/manual/*: Regenerate.

From-SVN: r223868

gcc/ChangeLog:
	    PR target/66215
	    * config/s390/s390.c (s390_reorg): Fix placement of post-label NOPs
	    with -mhotpatch=.

gcc/testsuite/ChangeLog:
	    PR target/66215
	    * gcc.target/s390/hotpatch-1.c: Remove optimization options from
	    dg-options.
	    * gcc.target/s390/hotpatch-10.c: Likewise.
	    * gcc.target/s390/hotpatch-11.c: Likewise.
	    * gcc.target/s390/hotpatch-12.c: Likewise.
	    * gcc.target/s390/hotpatch-17.c: Likewise.
	    * gcc.target/s390/hotpatch-18.c: Likewise.
	    * gcc.target/s390/hotpatch-20.c: Likewise.
	    * gcc.target/s390/hotpatch-21.c: Likewise.
	    * gcc.target/s390/hotpatch-22.c: Likewise.
	    * gcc.target/s390/hotpatch-23.c: Likewise.
	    * gcc.target/s390/hotpatch-24.c: Likewise.
	    * gcc.target/s390/hotpatch-2.c: Likewise.  Adjust scan-assembler
	    to check for the exact nops too.
	    * gcc.target/s390/hotpatch-3.c: Likewise.
	    * gcc.target/s390/hotpatch-4.c: Likewise.
	    * gcc.target/s390/hotpatch-5.c: Likewise.
	    * gcc.target/s390/hotpatch-6.c: Likewise.
	    * gcc.target/s390/hotpatch-7.c: Likewise.
	    * gcc.target/s390/hotpatch-8.c: Likewise.
	    * gcc.target/s390/hotpatch-9.c: Likewise.
	    * gcc.target/s390/hotpatch-14.c: Likewise.
	    * gcc.target/s390/hotpatch-15.c: Likewise.
	    * gcc.target/s390/hotpatch-16.c: Likewise.
	    * gcc.target/s390/hotpatch-19.c: Likewise.
	    * gcc.target/s390/hotpatch-25.c: Likewise.  Remove
	    scan-assembler-times counting number of .align directives.
	    * gcc.target/s390/hotpatch-13.c: Remove optimization options from
	    dg-options.  Remove scan-assembler-times counting number of .align
	    directives.
	    * gcc.target/s390/hotpatch-26.c: New file.
	    * gcc.target/s390/hotpatch-27.c: New file.
	    * gcc.target/s390/hotpatch-28.c: New file.
	    * gcc.target/s390/s390.exp: Run hotpatch-*.c tests as torture tests
	    using -Os -O0 -O1 -O2 -O3 options.

From-SVN: r223867

	* include/std/future (__async_result_of): New alias template.
	(async): Use __async_result_of to pass decayed types to result_of.
	* testsuite/30_threads/async/lwg2021.cc: New.
	* doc/xml/manual/intro.xml: Document LWG 2021 status.

From-SVN: r223866

	PR libstdc++/66327
	* include/bits/stl_algobase.h (__equal<true>::equal): Do not call
	memcmp with null pointers.
	(__lexicographical_compare<true>::__lc): Do not call memcmp for empty
	ranges.

From-SVN: r223865

	* gcc.target/aarch64/vdup_lane_2.c: Close comment on final line.

From-SVN: r223864

re PR tree-optimization/66142 (Loop is not vectorized because not sufficient support for GOMP_SIMD_LANE)

	PR tree-optimization/66142
	* tree-if-conv.c (if_convertible_phi_p): Don't give up on
	virtual phis that feed themselves.

	* gcc.dg/vect/pr66142.c: New test.

From-SVN: r223863

2015-05-29  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/66314
	* tree-ssa-threadupdate.c (create_block_for_threading): Add
	parameter that says which loop the new block belongs to.
	(ssa_create_duplicates): Blocks duplicated for the threaded
	path belong to the loop of the thread destination.

	* gcc.dg/asan/pr66314.c: New testcase.

From-SVN: r223861

t-msp430 (MULTILIB_OPTIONS): Add multilibs for the different types of hardware multiply available on the MSP430.

	* config/msp430/t-msp430 (MULTILIB_OPTIONS): Add multilibs for the
	different types of hardware multiply available on the MSP430.
	(MULTILIB_DIRNAMES): Likewise.
	(MULTILIB_EXCEPTIONS): Add exceptions for incompatible cpus and
	hardware multiply types.
	(MULTILIB_MATCHES): Add matches for known MCU names and hardware
	multiply types.

From-SVN: r223860

libbacktrace/
2015-05-29  Tristan Gingold  <gingold@adacore.com>

	* pecoff.c: New file.
	* Makefile.am (FORMAT_FILES): Add pecoff.c and dependencies.
	* Makefile.in: Regenerate.
	* filetype.awk: Detect pecoff.
	* configure.ac: Define BACKTRACE_SUPPORTS_DATA on elf platforms.
	Add pecoff.
	* btest.c (test5): Test enabled only if BACKTRACE_SUPPORTS_DATA is
	true.
	* backtrace-supported.h.in (BACKTRACE_SUPPORTS_DATA): Define.
	* configure: Regenerate.
	* pecoff.c: New file.

From-SVN: r223859

gcc/testsuite/ChangeLog

2015-05-29  Bernhard Reutner-Fischer  <aldot@gcc.gnu.org>

	* lib/gcc-dg.exp (cleanup-ipa-dump, cleanup-rtl-dump,
	cleanup-tree-dump, cleanup-dump, cleanup-saved-temps): Remove.
	Adjust all callers.
	(schedule-cleanups, dg-keep-saved-temps): New proc.
	(gcc-dg-test-1): Schedule cleanups.
	* lib/profopt.exp (profopt-execute): Likewise.
	* g++.dg/cdce3.C: Adjust expected line numbers.
	* gcc.dg/cdce1.c: Likewise.
	* gcc.dg/cdce2.c: Likewise.
	* gcc.dg/strlenopt-22.c: Fix comment delimiter.
	* gcc.dg/strlenopt-24.c: Likewise.
	* gcc.dg/tree-ssa/vrp26.c: Likewise.
	* gcc.dg/tree-ssa/vrp28.c: Likewise.
	* obj-c++.dg/encode-2.mm: Likewise.

libgomp/ChangeLog

2015-05-29  Bernhard Reutner-Fischer  <aldot@gcc.gnu.org>

	* testsuite/libgomp.graphite/bounds.c: Adjust for
	cleanup-tree-dump removal.
	* testsuite/libgomp.graphite/force-parallel-1.c: Likewise.
	* testsuite/libgomp.graphite/force-parallel-2.c: Likewise.
	* testsuite/libgomp.graphite/force-parallel-3.c: Likewise.
	* testsuite/libgomp.graphite/force-parallel-4.c: Likewise.
	* testsuite/libgomp.graphite/force-parallel-5.c: Likewise.
	* testsuite/libgomp.graphite/force-parallel-6.c: Likewise.
	* testsuite/libgomp.graphite/force-parallel-7.c: Likewise.
	* testsuite/libgomp.graphite/force-parallel-8.c: Likewise.
	* testsuite/libgomp.graphite/force-parallel-9.c: Likewise.
	* testsuite/libgomp.graphite/pr41118.c: Likewise.


gcc/ChangeLog

2015-05-29  Bernhard Reutner-Fischer  <aldot@gcc.gnu.org>

	* config/arm/neon-testgen.ml (emit_epilogue): Remove manual call
	to cleanup-saved-temps.
	* doc/sourcebuild.texi (Clean up generated test files): Expand
	introduction.
	(dg-keep-saved-temps): Document new proc.
	(cleanup-ipa-dump, cleanup-rtl-dump, cleanup-tree-dump,
	cleanup-saved-temps): Remove.

From-SVN: r223858

From-SVN: r223856

From-SVN: r223851

2015-05-28  Andreas Tobler  <andreast@gcc.gnu.org>

    * configure.ac: Move the atoll check from AC_CHECK_FUNCS to
    gcc_AC_CHECK_DECLS.
    * configure: Regenerate.

From-SVN: r223847

2015-05-28  Andreas Tobler  <andreast@gcc.gnu.org>

    * configure.host: Add bits for FreeBSD amd64 and i386.
    * configure.ac: Add signal handler for FreeBSD (amd64/i386)
    * configure: Regenerate.
    * include/freebsd-signal.h: New file.

From-SVN: r223845

	* config/linux/x86/futex_bits.h (sys_futex0) [__x86_64__]: Change
	operands "op" and "val" to int.

	* config/linux/sh/futex_bits.h (sys_futex0) Change operands
	"op" and "val" to int.

	* config/linux/alpha/futex_bits.h (sys_futex0) Change operands
	"op" and "val" to int.

	* config/linux/futex.cc (gtm_futex_wait, gtm_futex_wake):
	Declare as static int.
	(FUTEX_PRIVATE_FLAG): Remove L suffix.
	* config/linux/futex_bits.h (sys_futex0) Change operand "op" to int.

	Revert:
	* config/linux/x86/futex.h (sys_futex0) [!__x86_64__]:
	Change operand "op" to long.

From-SVN: r223844

re PR libstdc++/65352 (array<T,0>::begin()/end() etc. forms a null reference and breaks on clang+ubsan)

	PR libstdc++/65352
	* include/profile/array (array::data): Use _S_ptr.
	* include/debug/array (array::data): Likewise.

From-SVN: r223838

	* gcc-interface/utils.c (max_size) <tcc_binary>: Add special code to
	deal with the subtraction of a "negative" value in an unsigned type.

From-SVN: r223837

decl.c (gnat_to_gnu_entity): Do not error out on a return type which has a size that overflows if...

	* gcc-interface/decl.c (gnat_to_gnu_entity) <E_Subprogram_Type>: Do
	not error out on a return type which has a size that overflows if the
	return is done by invisible reference.

From-SVN: r223836

utils.c (gnat_pushdecl): Reunify the handling of array and pointer types wrt DECL_ORIGINAL_TYPE and...

	* gcc-interface/utils.c (gnat_pushdecl): Reunify the handling of array
	and pointer types wrt DECL_ORIGINAL_TYPE and adjust left and right.

From-SVN: r223835

	* gcc-interface/gigi.h (gnat_stabilize_reference): Adjust.
	(rewrite_fn): Remove third parameter.
	(type_is_padding_self_referential): New inline predicate.
	(return_type_with_variable_size_p): Likewise.
	* gcc-interface/decl.c (allocatable_size_p): More around.
	(cannot_be_superflat_p): Rename into...
	(cannot_be_superflat ): ...this.
	(initial_value_needs_conversion): New predicate.
	(gnat_to_gnu_entity): Invoke type_is_padding_self_referential,
	initial_value_needs_conversion and adjust to above renaming.
	For a renaming, force the materialization if the inner expression
	is compound.  Adjust calls to elaborate_reference and build a
	compound expression if needed.
	(struct er_dat): Add N field.
	(elaborate_reference_1): Remove N parameter and adjust.
	(elaborate_reference): Add INIT parameter and pass it in the call to
	gnat_rewrite_reference.  Adjust initial expression.
	* gcc-interface/trans.c (Call_to_gnu): Treat renamings the same way as
	regular object declarations when it comes to creating a temporary.
	Adjust call to gnat_stabilize_reference and build a compound expression
 	if needed.  Invoke return_type_with_variable_size_p.
	(gnat_to_gnu): Invoke type_is_padding_self_referential.  In case #4,
	return a call to a function unmodified if it returns with variable size
 	and is also the initial expression in an object declaration.
	* gcc-interface/utils2.c (build_binary_op) <INIT_EXPR>: Use the RHS'
	type if it is a call to a function that returns with variable size.
	(build_unary_op): Invoke type_is_padding_self_referential.
	(gnat_stabilize_reference_1): Remove N parameter and adjust.
	(gnat_stabilize_reference): Add INIT parameter and pass it in the call
	to gnat_rewrite_reference.
	(gnat_rewrite_reference):  Remove N, add INIT parameter and adjust.
	<COMPOUND_EXPR>: New case.

From-SVN: r223834

Spacing is off causing --help to not line up.  Use the standard
AS_HELP_STRING like all the other options.

From-SVN: r223833

Define CPP_SPEC for nios2 linux targets so that -posix & -pthread work
like on all other linux targets.

Discovered via Gentoo bug https://bugs.gentoo.org/543114

From-SVN: r223823

Define CPP_SPEC for microblaze linux targets so that -posix & -pthread
work like on all other linux targets.

Discovered via Gentoo bug https://bugs.gentoo.org/543114

From-SVN: r223822

	* config/linux/x86/futex.h (sys_futex0) [!__x86_64__]: Remove function.
	(futex_wait) [!__x86_64__]: Use __asm operand instead of sys_futex0.
	(futex_wake) [!__x86_64__]: Ditto.

From-SVN: r223821

Define CPP_SPEC for parisc linux targets so that -posix & -pthread work
like on all other linux targets.

Discovered via Gentoo bug https://bugs.gentoo.org/543114

From-SVN: r223820

2015-05-28  Richard Biener  <rguenther@suse.de>

	* tree-vect-loop.c (vect_fixup_reduc_chain): New function.
	(vect_fixup_scalar_cycles_with_patterns): Likewise.
	(vect_analyze_loop_2): Call vect_fixup_scalar_cycles_with_patterns
	after pattern recog.
	(vect_create_epilog_for_reduction): Properly handle reductions
	with patterns.
	(vectorizable_reduction): Likewise.
	* tree-vect-slp.c (vect_analyze_slp_instance): Properly mark
	reduction chains.
	(vect_get_constant_vectors): Create the correct number of
	initial values for reductions.
	(vect_schedule_slp_instance): Handle reduction chains that are
	type changing properly.
	* tree-vect-stmts.c (vect_analyze_stmt): Adjust.

	* gcc.dg/vect/slp-reduc-sad.c: New testcase.

From-SVN: r223818

2015-05-28  Ed Schonberg  <schonberg@adacore.com>

	* sem_ch3.adb (Is_Visible_Component): Component is visible
	in a derived type if inherited through an ancestor that has a
	partial view of the original type holding the component, if the
	full view of that original type is in scope.
	* sem_util.ads (Get_Body_From_Stub): Works for all kinds of stubs.

2015-05-28  Bob Duff  <duff@adacore.com>

	* sem_util.adb (Requires_Transient_Scope): For definite untagged
	subtypes, we should never have to use the secondary stack. This moves
	toward that goal. But there are still cases that don't work.
	Here, we move the check for Is_Definite first, but add a
	special-purpose check for Has_Discrim_Dep_Array.

From-SVN: r223817

re PR tree-optimization/66142 (Loop is not vectorized because not sufficient support for GOMP_SIMD_LANE)

2015-05-28  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/66142
	* tree-ssa-sccvn.c (vn_reference_lookup_3): Handle non-GIMPLE
	values better in memcpy destination handling.  Handle non-aliasing
	we discover here.

	* gcc.dg/tree-ssa/ssa-fre-44.c: Fixup.

From-SVN: r223816

sem_util.adb (Requires_Transient_Scope): Avoid returning function results on the secondary stack in so many cases.

2015-05-28  Bob Duff  <duff@adacore.com>

	* sem_util.adb (Requires_Transient_Scope): Avoid returning
	function results on the secondary stack in so many cases.

From-SVN: r223814