PR rtl-optimization/78546
	* simplify-rtx.c (neg_const_int): When negating most negative
	number in mode wider than HOST_BITS_PER_WIDE_INT, use
	simplify_const_unary_operation to produce CONST_DOUBLE or
	CONST_WIDE_INT.
	(simplify_plus_minus): Hanlde the case where neg_const_int
	doesn't return a CONST_INT.

	* gcc.dg/torture/pr78546-1.c: New test.
	* gcc.dg/torture/pr78546-2.c: New test.

From-SVN: r242929

Running bootstrap-ubsan on ppc64le shows many instances of e.g.:
 config/rs6000/rs6000.c:6217:36: runtime error: left shift of negative value -12301

        PR target/78556
	* config/rs6000/rs6000.c (vspltis_constant): Add casts to avoid
	left shifting of negative values.

From-SVN: r242928

	PR fortran/78298
	* tree-nested.c (convert_local_reference_stmt): After adding
	shared (FRAME.NN) clause to omp parallel, task or target,
	add it also to all outer omp parallel, task or target constructs.

	* gfortran.dg/gomp/pr78298.f90: New test.

From-SVN: r242926

	* config/i386/i386.md (UNSPEC_KMASKOP): New.
	(UNSPEC_KMOV): Remove.
	(kmovw): Expand to plain HImode move.
	(k<any_logic:code><mode>): Rename from *k<logic><mode>. Use
	register_operand predicates.  Tag pattern with UNSPEC_KMASKOP.
	Remove corresponding clobber-removing splitter.
	(*anddi_1): Remove mask register alternatives.
	(*andsi_1): Ditto.
	(*andhi_1): Ditto.
	(*andqi_1): Ditto.
	(*<any_or:code><mode>_1): Ditto.
	(*<any_or:code>qi_1): Ditto.
	(kandn<mode>): Use SWI1248_AVX512BW mode iterator.  Remove
	general register alternatives.  Tag pattern with UNSPEC_KMASKOP.
	Remove corresponding splitter to operation with general registers.
	(*andn<SWI38:mode>): Rename from *bmi_andn_<mode>.
	(*andn<SWI12:mode>): New pattern.
	(*kxnor<mode>): Remove general register alternatives.  Tag pattern
	with UNSPEC_KMASKOP.  Remove corresponding splitter to operation
	with general registers.
	(knot<mode>): New insn pattern.
	(*one_cmpl<mode>2_1): Remove mask register alternatives.
	(one_cmplqi2_1): Ditto.
	(*k<any_lshift:code><mode>): Rename from *k<mshift><mode>3.
	Tag pattern with UNSPEC_KMASKOP. Add mode attribute.
	* config/i386/predicates.md (mask_reg_operand): Remove predicate.
	* config/i386/sse.md (vec_unpacks_hi_hi): Update pattern
	to generate kmaskop shift.
	(vec_unpacks_hi_<mode>): Ditto.
	* config/i386/i386-builtin.def (__builtin_ia32_kandhi):
	Use CODE_FOR_kandhi.
	(__builtin_ia32_knothi): Use CODE_FOR_knothi.
	(__builtin_ia32_korhi): Use CODE_FOR_kiorhi.
	(__builtin_ia32_kxorhi): Use CODE_FOR_kxorhi.

testsuite/ChangeLog:

	* gcc.target/i386/bmi-andn-1a.c (dg-final): Update scan string.
	* gcc.target/i386/bmi-andn-2a.c (dg-final): Ditto.

From-SVN: r242925

re PR c++/77591 (decltype(auto) and ternary operator allow returning local reference without a warning)

	PR c++/77591
	* typeck.c (maybe_warn_about_returning_address_of_local): Optimize
	whats_returned through fold_for_warn.

	* g++.dg/cpp1y/pr77591.C: New test.

From-SVN: r242924

From-SVN: r242923

From-SVN: r242922

tree-vrp.c (vrp_visit_assignment_or_call): Handle simplifications to SSA names via extract_range_from_ssa_name if allowed.

2016-11-28  Richard Biener  <rguenther@suse.de>

	* tree-vrp.c (vrp_visit_assignment_or_call): Handle
	simplifications to SSA names via extract_range_from_ssa_name
	if allowed.

From-SVN: r242921

2016-11-28  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/78542
	* tree-ssa-ccp.c (evaluate_stmt): Only valueize simplification
	if allowed.

	* gcc.dg/torture/pr78542.c: New testcase.

From-SVN: r242920

	* config/nvptx/critical.c: Delete to use generic implementation.

From-SVN: r242919

2016-11-28  Jonas Hahnfeld  <Hahnfeld@itc.rwth-aachen.de>

	* config/linux/affinity.c [!HAVE_PTHREAD_AFFINITY_NP]: Include
	../../affinity.c as fallback.
	* config/nvptx/affinity.c: Delete to use fallback implementation.

From-SVN: r242918

gcc:
* combine.c (simplify_if_then_else): Simplify IF_THEN_ELSE
that isolates a single bit, even if the condition involves
subregs.

From-SVN: r242917

	* config/aarch64/aarch64-simd-builtins.def
	(BSL_P): Added di and v2di mode.
	* config/aarch64/arm_neon.h
	(vsriq_n_p64, vsri_n_p64): Added poly type.
	(vextq_p64, vext_p64): Likewise.
	(vceq_p64, vbslq_p64, vbsl_p64): Likewise.

From-SVN: r242916

2016-11-28  Tamar Christina  <tamar.christina@arm.com>

	* config/aarch64/aarch64-builtins.c (TYPES_SETREGP): Added poly type.
	(TYPES_GETREGP): Likewise.
	(TYPES_SHIFTINSERTP): Likewise.
	(TYPES_COMBINEP): Likewise.
	(TYPES_STORE1P): Likewise.
	* config/aarch64/aarch64-simd-builtins.def
	(combine): Added poly generator.
	(get_dregoi): Likewise.
	(get_dregci): Likewise.
	(get_dregxi): Likewise.
	(ssli_n): Likewise.
	(ld1): Likewise.
	(st1): Likewise.
	* config/aarch64/arm_neon.h
	(poly64x1x2_t, poly64x1x3_t): New.
	(poly64x1x4_t, poly64x2x2_t): Likewise.
	(poly64x2x3_t, poly64x2x4_t): Likewise.
	(poly64x1_t): Likewise.
	(vcreate_p64, vcombine_p64): Likewise.
	(vdup_n_p64, vdupq_n_p64): Likewise.
	(vld2_p64, vld2q_p64): Likewise.
	(vld3_p64, vld3q_p64): Likewise.
	(vld4_p64, vld4q_p64): Likewise.
	(vld2_dup_p64, vld3_dup_p64): Likewise.
	(vld4_dup_p64, vsli_n_p64): Likewise.
	(vsliq_n_p64, vst1_p64): Likewise.
	(vst1q_p64, vst2_p64): Likewise.
	(vst3_p64, vst4_p64): Likewise.
	(__aarch64_vdup_lane_p64, __aarch64_vdup_laneq_p64): Likewise.
	(__aarch64_vdupq_lane_p64, __aarch64_vdupq_laneq_p64): Likewise.
	(vget_lane_p64, vgetq_lane_p64): Likewise.
	(vreinterpret_p8_p64, vreinterpretq_p8_p64): Likewise.
	(vreinterpret_p16_p64, vreinterpretq_p16_p64): Likewise.
	(vreinterpret_p64_f16, vreinterpret_p64_f64): Likewise.
	(vreinterpret_p64_s8, vreinterpret_p64_s16): Likewise.
	(vreinterpret_p64_s32, vreinterpret_p64_s64): Likewise.
	(vreinterpret_p64_f32, vreinterpret_p64_u8): Likewise.
	(vreinterpret_p64_u16, vreinterpret_p64_u32): Likewise.
	(vreinterpret_p64_u64, vreinterpret_p64_p8): Likewise.
	(vreinterpretq_p64_f64, vreinterpretq_p64_s8): Likewise.
	(vreinterpretq_p64_s16, vreinterpretq_p64_s32): Likewise.
	(vreinterpretq_p64_s64, vreinterpretq_p64_f16): Likewise.
	(vreinterpretq_p64_f32, vreinterpretq_p64_u8): Likewise.
	(vreinterpretq_p64_u16, vreinterpretq_p64_u32): Likewise.
	(vreinterpretq_p64_u64, vreinterpretq_p64_p8): Likewise.
	(vreinterpret_f16_p64, vreinterpretq_f16_p64): Likewise.
	(vreinterpret_f32_p64, vreinterpretq_f32_p64): Likewise.
	(vreinterpret_f64_p64, vreinterpretq_f64_p64): Likewise.
	(vreinterpret_s64_p64, vreinterpretq_s64_p64): Likewise.
	(vreinterpret_u64_p64, vreinterpretq_u64_p64): Likewise.
	(vreinterpret_s8_p64, vreinterpretq_s8_p64): Likewise.
	(vreinterpret_s16_p64, vreinterpret_s32_p64): Likewise.
	(vreinterpretq_s32_p64, vreinterpret_u8_p64): Likewise.
	(vreinterpret_u16_p64, vreinterpretq_u16_p64): Likewise.
	(vreinterpret_u32_p64, vreinterpretq_u32_p64): Likewise.
	(vset_lane_p64, vsetq_lane_p64): Likewise.
	(vget_low_p64, vget_high_p64): Likewise.
	(vcombine_p64, vst2_lane_p64): Likewise.
	(vst3_lane_p64, vst4_lane_p64): Likewise.
	(vst2q_lane_p64, vst3q_lane_p64): Likewise.
	(vst4q_lane_p64, vget_lane_p64): Likewise.
	(vget_laneq_p64, vset_lane_p64): Likewise.
	(vset_laneq_p64, vcopy_lane_p64): Likewise.
	(vcopy_laneq_p64, vdup_n_p64): Likewise.
	(vdupq_n_p64, vdup_lane_p64): Likewise.
	(vdup_laneq_p64, vld1_p64): Likewise.
	(vld1q_p64, vld1_dup_p64): Likewise.
	(vld1q_dup_p64, vld1q_dup_p64): Likewise.
	(vmov_n_p64, vmovq_n_p64): Likewise.
	(vst3q_p64, vst4q_p64): Likewise.
	(vld1_lane_p64, vld1q_lane_p64): Likewise.
	(vst1_lane_p64, vst1q_lane_p64): Likewise.
	(vcopy_laneq_p64, vcopyq_laneq_p64): Likewise.
	(vdupq_laneq_p64): Likewise.

From-SVN: r242915

	* config/arm/arm_neon.h (vget_lane_p64): New.

From-SVN: r242914

2016-11-28  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/78343
	* gcc.dg/tree-ssa/20030808-1.c: Fix dump to generate.
	* gcc.dg/tree-ssa/20040305-1.c: Likewise.

From-SVN: r242913

The method used in the applied patch caused configuration errors on freeBSD and hppa.

2016-11-28  Iain Sandoe  <iain@codesourcery.com>

	PR target/71767
	* configure.ac (with_ld64): Use portable method to extract the
	major part of the version number.
	* configure: Regenerated.

From-SVN: r242912

	* gimple-ssa-sprintf.c (build_intmax_type_nodes): Look at
	UINTMAX_TYPE rather than SIZE_TYPE.  Add gcc_unreachable if
	intmax_t couldn't be determined.
	(format_integer): Make {,u}intmax_type_node no longer static,
	initialize them only when needed.  For z and t use
	signed_or_unsigned_type_for instead of assuming size_t and
	ptrdiff_t have the same precision.

From-SVN: r242911

	PR lto/78211
	* ipa-icf.h (sem_item_optimizer): Add m_classes_vec member.
	* ipa-icf.c (sem_item_optimizer::sem_item_optimizer): Initialize
	it.
	(sem_item_optimizer::~sem_item_optimizer): Traverse m_classes_vec
	vector instead of traversing m_classes hash table.  Release
	m_classes_vec.
	(sem_item_optimizer::read_section, sem_item_optimizer::add_class):
	Formatting fixes.
	(sem_item_optimizer::get_group_by_hash): When inserting a new group,
	add it also to m_classes_vec vector.
	(sem_item_optimizer::remove_symtab_node,
	sem_item_optimizer::build_hash_based_classes,
	sem_item_optimizer::parse_nonsingleton_classes): Formatting fixes.
	(sem_item_optimizer::subdivide_classes_by_equality,
	sem_item_optimizer::subdivide_classes_by_sensitive_refs,
	sem_item_optimizer::verify_classes): Traverse m_classes_vec vector
	instead of traversing m_classes hash table.  Formatting fixes.
	(sem_item_optimizer::traverse_congruence_split,
	sem_item_optimizer::do_congruence_step_for_index,
	sem_item_optimizer::do_congruence_step): Formatting fixes.
	(sem_item_optimizer::process_cong_reduction): Traverse m_classes_vec
	vector instead of traversing m_classes hash table.
	(sem_item_optimizer::dump_cong_classes): Likewise.  Formatting fixes.
	(sem_item_optimizer::merge_classes): Traverse m_classes_vec vector
	instead of traversing m_classes hash table.

	* g++.dg/ipa/pr78211.C: New test.

From-SVN: r242910

	* config/avr/avr.c (out_movhi_r_mr) [REG_X + PLUS]: Only SBIW if
	X is not unused after.

From-SVN: r242909

	PR rtl-optimization/78120
	* rtlanal.c (insn_rtx_cost): Revert previous change.

From-SVN: r242908

	PR 41076
	* config/avr/avr.md (SPLIT34): New mode iterator.
	(bitop): New code iterator.
	(*iorhi3.ashift8-*). New insn-and-split patterns.
	(*movhi): Post-reload split reg = 0.
	[!MOVW]: Post-reload split reg = reg.
	(*mov<mode>) [SI,SF,PSI,SQ,USQ,SA,USA]: Post-reload split reg = reg.
	(andhi3, andpsi3, andsi3): Post-reload split reg-reg operations.
	(iorhi3, iorpsi3, iorsi3): Same.
	(xorhi3, xorpsi3, xorsi3): Same.
	* config/avr/avr.c (avr_rtx_costs_1) [IOR && HImode]: Adjust rtx
	costs to *iorhi3.ashift8-* patterns.

From-SVN: r242907

	* constexpr.c (cxx_eval_constant_expression): Use cp_fold_convert.

From-SVN: r242906

From-SVN: r242905

	PR ada/78524
	* gcc-interface/utils.c (max_size) <tcc_reference>: Add missing
	conversion to original type in the PLACEHOLDER_EXPR case.

From-SVN: r242902

	PR ada/78531
	* namet.h (Max_Line_Length): Define.
	(struct Bounded_String): Declare Chars with exact size.
	(namet__get_decoded_name_string): Delete.
	(Get_Decoded_Name_String): Likewise.
	(casing__set_all_upper_case): Likewise.

From-SVN: r242901

2016-11-27  Paul Thomas  <pault@gcc.gnu.org>

	PR fortran/78474
	* module.c (gfc_match_submodule): If there is more than one
	colon, it is a syntax error.

	PR fortran/78331
	* module.c (gfc_use_module): If an smod file does not exist it
	is either because the module does not have a module procedure
	interface or there is an error in the module.

2016-11-27  Paul Thomas  <pault@gcc.gnu.org>

	PR fortran/78474
	* gfortran.dg/submodule_22.f08: New test.

	PR fortran/78331
	* gfortran.dg/submodule_21.f08: New test.

From-SVN: r242900

	* g++.dg/torture/pr65655.C: Use dg-timeout-factor 2.

From-SVN: r242899

A/ Newer versions of ld64 check the min_version command, and newer versions of
   the system assembler inserts this in response to "-mmacosx-version-min=" on
   the assembler line. Unless one makes sensible versions, some object is bound
   to conflict.

B/ Additionally, there's a difference in behaviour between "as" and "ld" when
   presented with xx.yy.zz (ld truncates to xx.yy, as doesn't); net result is
   that one needs to pass a truncated version to "as".

So (if the assembler supports minversion commands)
(a) provide a truncated minversion (as asm_macosx_version_min, which is a
    driver-only var).
(b) pass this to "as"
(c) Update tests to determine 'HAVE_AS_MMACOSX_VERSION_MIN_OPTION'
    (Rainer's patch)
(d) For some reason the testcases are "run" (it's not obvious they need to be,
    they are checking compile-time issues)
  - anyway, to preserve the status quo, I've left them as exec.  However, the
    minimum version that can be code-gened for is target-dependent (there are no
    released x86 versions before 10.4, for example).  To avoid conflicts where
    the "as" is assuming some minimum, I've set the testversion to 10.5 (which
    is supported by all the archs we have)
(e) We need to ensure that libgcc and crts are generated with a sufficiently
    old minversion not to conflict.

gcc/

2016-11-27  Iain Sandoe  <iain@codesourcery.com>
	    Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>

	PR target/67710
	* config.in: Regenerate
	* config/darwin-driver.c (darwin_driver_init): Emit a version string
	for the assembler.
	* config/darwin.h(ASM_MMACOSX_VERSION_MIN_SPEC): New, new tests.
	* config/darwin.opt(asm_macosx_version_min): New.
	* config/i386/darwin.h: Handle ASM_MMACOSX_VERSION_MIN_SPEC.
	* configure: Regenerate
	* configure.ac: Check for mmacosx-version-min handling.

gcc/testsuite/

2016-11-27  Iain Sandoe  <iain@codesourcery.com>
	    Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
	    Dominique d'Humieres  <dominiq@lps.ens.fr>

	PR target/67710
	*  gcc.dg/darwin-minversion-1.c: Update min version check.
	*  gcc.dg/darwin-minversion-2.c: Likewise.
	*  gcc.dg/darwin-minversion-3.c: Likewise.

libgcc/

2016-11-27  Iain Sandoe  <iain@codesourcery.com>
	    Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>

	PR target/67710
	*  config/t-darwin: Default builds to 10.5 codegen.


Co-Authored-By: Dominique d'Humieres <dominiq@lps.ens.fr>
Co-Authored-By: Rainer Orth <ro@CeBiTec.Uni-Bielefeld.DE>

From-SVN: r242898

A.
Empty function bodies causes two problems for Darwin's linker (i) zero-length
FDEs and (ii) coincident label addresses that might point to items of
differing weakness.

B.
Trailing local labels can be problematic when they end a function because
similarly they might apparently point to a following weak function, leading
to the linker concluding that there's a pointer-diff to a weak symbol
(which is not allowed).

Both conditions arise from __builtin_unreachable() lowering to a barrier.

The solution for both is to emit some finite amount of code; in the case of A
a trap is emitted, in the case of B a nop.

gcc/

2016-11-27  Iain Sandoe  <iain@codesourcery.com>

	PR target/57438
	* config/i386/i386.c (ix86_code_end): Note that we emitted code
	where the function might otherwise appear empty for picbase thunks.
	(ix86_output_function_epilogue): If we find a zero-sized function
	assume that reaching it is UB and trap.  If we find a trailing label
	append a nop.
	* config/rs6000/rs6000.c (rs6000_output_function_epilogue): If we
	find a zero-sized function assume that reaching it is UB and trap.
	If we find a trailing label, append a nop.

gcc/testsuite/

2016-11-27  Iain Sandoe  <iain@codesourcery.com>

	PR target/57438
	* gcc.dg/pr57438-1.c: New Test.
	* gcc.dg/pr57438-2.c: New Test.

From-SVN: r242897

 Update Darwin tests to reflect the differences in symbol names and section
 usage.

gcc/testsuite/

2016-11-27  Dominique d'Humieres  <dominiq@lps.ens.fr>
	    Iain Sandoe  <iain@codesourcery.com>

	PR target/71767
	* g++.dg/abi/key2.C: Adjust for changed Darwin sections and
	linker-visible symbols.
	* g++.dg/torture/darwin-cfstring-3.C: Likewise.
	* gcc.dg/const-uniq-1.c: Likewise.
	* gcc.dg/torture/darwin-cfstring-3.c: Likewise.
	* gcc.target/i386/pr70799-1.c: Likewise.


Co-Authored-By: Iain Sandoe <iain@codesourcery.com>

From-SVN: r242896

 (much) Older Darwin linkers needed separate sections marked "coalesce" to
 allow for weak symbol coalescing.  This has not been needed for some time
 and is now deprecated, newer assemblers warn if the old coalesced sections
 are used.
 
 
gcc/

2016-11-27  Iain Sandoe  <iain@codesourcery.com>

	PR target/71767
	* config/darwin-sections.def (picbase_thunk_section): New.
	* config/darwin.c (darwin_init_sections): Set up picbase thunk
	section. (darwin_rodata_section, darwin_objc2_section,
	machopic_select_section, darwin_asm_declare_constant_name,
	darwin_emit_weak_or_comdat, darwin_function_section): Don’t use
	coalesced with newer linkers.
	(darwin_override_options): Decide on usage of coalesed sections
	on the basis of the target linker version.
	* config/darwin.h (MIN_LD64_NO_COAL_SECTS): New.
	* config/darwin.opt  (mtarget-linker): New.
	* config/i386/i386.c (ix86_code_end): Do not force the thunks into
	a coalesced section, instead use a thunks section.

From-SVN: r242895

 This is an initial patch in a series that converts Darwin's configury
 to detect ld64 features, rather than the current process of hard-coding
 them on target system version.

 A ld64-compatible linker is currently required and assumed by Darwin.
 If a DEFAULT_LINKER is set via --with-ld= then this will be tested to
 see if it is ld64.

 The ld64 version is determined for the chosen ld and this is exported for
 use in setting a default value for -mtarget-linker (needed for run-time
 code-gen changes to section choices).
 The support for -rdynamic is converted to be detected at config time, or
 by the ld64 version if that is found.

gcc/

2016-11-27  Iain Sandoe  <iain@codesourcery.com>

	PR target/71767
	* configure.ac (with-ld64): New var, set for Darwin, set on
	detection of ld64, gcc_cv_ld64_export_dynamic: New, New test.
	* config/darwin.h: Use LD64_HAS_DYNAMIC export. DEF_LD64: New,
	define.
	* config/darwin10.h(DEF_LD64): Update for this target version.
	* config/darwin12.h(LINK_GCC_C_SEQUENCE_SPEC): Remove rdynamic
	test.  (DEF_LD64): Update for this target version.
	* configure: Regenerated.
	* config.in: Regenerated.

From-SVN: r242894

Indirections:

  If we have a situation like:

global_weak_symbol:
  ....
Lnon_weak_local:
  ....

  ld64 will be unable to split this into two atoms (because the "L" makes
  the second symbol 'invisible').  This means that legitimate direct accesses
  to the second symbol will appear to be non-allowed direct accesses to an
  atom of type weak, global which are not allowed.

  To avoid this, we make the indirections have a leading 'l' (lower-case L)
  which has a special meaning: linker can see this and use it to determine
  atoms, but it is not placed into the final symbol table.

  The implementation here is somewhat heavy-handed in that it will also mark
  indirections to the __IMPORT,__pointers section the same way which is
  really unnecessary, since ld64 _can_ split those into atoms as they are
  fixed size.  FIXME: determine if this is a penalty worth extra code to
  fix.

Similarly, with:

  .const
weak_global_constant:
  ....

LCxx:
  ...

 ld64 can't split the second, causing a warning when it's directly
accessed.

gcc/

2016-11-27  Iain Sandoe  <iain@codesourcery.com>

	PR target/71767
	* config/darwin.c (imachopic_indirection_name): Make data
	section indirections linker-visible.
	* config/darwin.h (ASM_GENERATE_INTERNAL_LABEL): Make local
	constant labels linker-visible.

From-SVN: r242893

	PR libstdc++/78441
	* include/std/variant: Propagate cv qualifications to types returned
	by variant_alternative.
	* testsuite/20_util/variant/compile.cc: Tests.

From-SVN: r242892

From-SVN: r242891

2016-11-26  Prathamesh Kulkarni  <prathamesh.kulkarni@linaro.org>

	* tree.c (build_common_tree_nodes): Initialize ptrdiff_type_node.
	(free_lang_data): Remove assignment to ptrdiff_type_node.
c-family/
	* c-common.c (c_common_nodes_and_builtins): Remove initialization of
	ptrdiff_type_node.
lto/
	* lto-lang.c (lto_init): Remove initialization of ptrdiff_type_node.

From-SVN: r242888

From-SVN: r242887

2016-11-25  Janne Blomqvist  <jb@gcc.gnu.org>

       * intrinsic.texi: Fix ptrdiff_t typo in ISO_C_BINDING constants
       table.

From-SVN: r242884

	PR rtl-optimization/78438
	PR rtl-optimization/78477
	* gcc.c-torture/execute/pr78438.c: New test.
	* gcc.c-torture/execute/pr78477.c: New test.

From-SVN: r242883