gcc/testsuite/ChangeLog

	* gcc.dg/Wframe-address.c: S/390 requires the -mbackchain option to
	access arbitrary stack frames.
	* gcc.dg/Wno-frame-address.c: Likewise.

From-SVN: r231273

gcc/ChangeLog

	* config/s390/s390.c (s390_asm_file_start): Implement hook function to
	emit .machine and .machinemode to the top of the assembler file.
	(TARGET_ASM_FILE_START): Provide target hook.
	(s390_asm_output_machine_for_arch): Protect with
	HAVE_AS_MACHINE_MACHINEMODE instead of S390_USE_TARGET_ATTRIBUTE.

gcc/testsuite/ChangeLog

	* gcc.target/s390/asm-machine-1.c: Updated.
	* gcc.target/s390/asm-machine-2.c: Updated.
	* gcc.target/s390/asm-machine-3.c: Updated.
	* gcc.target/s390/asm-machine-4.c: Updated.

From-SVN: r231272

gcc/ChangeLog

	* config/s390/s390.opt (s390_arch_string): Remove.
	(s390_tune_string): Likewise.
	(s390_cost_pointer): Add Variable.
	(s390_tune_flags): Add TargetVariable.
	(s390_arch_flags, march=, mbackchain, mdebug, mesa, mhard-dfp),
	(mhard-float, mlong-double-128, mlong-double-64, mhtm, mvx),
	(mpacked-stack, msmall-exec, msoft-float, mstack-guard=, mstack-size=),
	(mtune=, mmvcle, mzvector, mzarch, mbranch-cost=, mwarn-dynamicstack),
	(mwarn-framesize=): Save option.
	(mno-stack-guard, mno-stack-guard): New option.
	(mwarn-dynamicstack): Allow mno-warn-dynamicstack.
	(mwarn-framesize=): Convert to UInteger (negative values are rejected
	now).
	* config/s390/s390-c.c (s390_cpu_cpp_builtins_internal): Split setting
	macros changeable through the GCC target pragma into a separate
	function.
	(s390_cpu_cpp_builtins): Likewise.
	(s390_pragma_target_parse): New function, implement GCC target pragma
	if enabled.
	(s390_register_target_pragmas): Register s390_pragma_target_parse if
	available.
	* common/config/s390/s390-common.c (s390_handle_option):
	Export.
	Move setting s390_arch_flags to s390.c.
	Remove s390_tune_flags.
	Allow 0 as argument to -mstack-size (switch to default value).
	Allow 0 as argument to -mstack-guard (switch off).
	Remove now unnecessary explicit parsing code for -mwarn-framesize.
	* config/s390/s390-protos.h (s390_handle_option): Export.
	(s390_valid_target_attribute_tree): Export.
	(s390_reset_previous_fndecl): Export.
	* config/s390/s390-builtins.def: Use new macro B_GROUP to mark the start
	and end of HTM and VX builtins.
	(s390_asm_output_function_prefix): Declare hook.
	(s390_asm_declare_function_size): Likewise.
	* config/s390/s390-builtins.h (B_GROUP): Use macro.
	* config/s390/s390-opts.h: Add comment about processor_type usage.
	* config/s390/s390.h (TARGET_CPU_IEEE_FLOAT_P, TARGET_CPU_ZARCH_P),
	(TARGET_CPU_LONG_DISPLACEMENT_P, TARGET_CPU_EXTIMM_P, TARGET_CPU_DFP_P),
	(TARGET_CPU_Z10_P, TARGET_CPU_Z196_P, TARGET_CPU_ZEC12_P),
	(TARGET_CPU_HTM_P, TARGET_CPU_Z13_P, TARGET_CPU_VX_P),
	(TARGET_HARD_FLOAT_P, TARGET_LONG_DISPLACEMENT_P, TARGET_EXTIMM_P),
	(TARGET_DFP_P, TARGET_Z10_P, TARGET_Z196_P, TARGET_ZEC12_P),
	(TARGET_HTM_P, TARGET_Z13_P, TARGET_VX_P, TARGET_CPU_EXTIMM),
	(TARGET_CPU_DFP, TARGET_CPU_Z10, TARGET_CPU_Z196, TARGET_CPU_ZEC12),
	(TARGET_CPU_HTM, TARGET_CPU_Z13, TARGET_LONG_DISPLACEMENT),
	(TARGET_EXTIMM, TARGET_DFP, TARGET_Z10, TARGET_Z196, TARGET_ZEC12),
	(TARGET_Z13, TARGET_VX, S390_USE_TARGET_ATTRIBUTE),
	(S390_USE_ARCHITECTURE_MODIFIERS, SWITCHABLE_TARGET),
	(ASM_DECLARE_FUNCTION_SIZE, ASM_OUTPUT_FUNCTION_PREFIX): Likewise.
	* config/s390/vecintrin.h: Use vector definitions even if __VEC__ is
	undefined.
	(vec_all_nan): Rewrite as macro using statement expressions to avoid
	that the vector keyword needs to be defined when including the file.
	(vec_all_numeric): Likewise.
	(vec_any_nan): Likewise.
	(vec_any_numeric):  Likewise.
	* config/s390/s390.c (s390_previous_fndecl): New static variable.
	(s390_set_current_function): New function.
	(s390_cost): Wrapper macro to allow defining the cost table pointer in
	the options file.
	(processor_table): Table for march= and mtune= parsing.
	(s390_init_builtins): Enable all builtins and types unconditionally.
	(s390_expand_builtin): Generate an error message if builtin is not
	supported by current options.
	Correct an error message.
	(s390_function_specific_restore): New function to set s390_cost.
	(s390_asm_output_machine_for_arch): New function for emitting .machine
	and .machinmode directives to the assembler file.
	(s390_asm_output_function_prefix): Likewise.
	(s390_asm_declare_function_size):  Likewise.
	(s390_asm_output_function_label): Add mdebug output for feature testing.
	(s390_option_override): Move implementation into internal function.
	(s390_option_override_internal): Likewise.
	Implement option overriding based on current options.
	(s390_valid_target_attribute_inner_p): New function implementing target
	attribute logic.
	(s390_valid_target_attribute_tree): Likewise.
	(s390_valid_target_attribute_p): Likewise.
	(s390_reset_previous_fndecl): Likewise.
	(s390_set_current_function): Likewise.
	(TARGET_SET_CURRENT_FUNCTION): Provide target hook function.
	(TARGET_OPTION_VALID_ATTRIBUTE_P): Likewise.
	(TARGET_OPTION_RESTORE): Likewise.
	* doc/extend.texi: S390: Document target attribute and pragma.
	* config.in: Regenerated.
	* configure: Regenerated.
	* configure.ac: S390: Check for .machinemode and .machine in gas.
	S390: Check for architecture modifiers support in gas.

gcc/testsuite/ChangeLog

	* gcc.target/s390/asm-machine-1.c: New test.
	* gcc.target/s390/asm-machine-2.c: New test.
	* gcc.target/s390/asm-machine-3.c: New test.
	* gcc.target/s390/asm-machine-4.c: New test.
	* gcc.target/s390/target-attribute/tattr-1.c: New test.
	* gcc.target/s390/target-attribute/tattr-2.c: New test.
	* gcc.target/s390/target-attribute/tattr-3.c: New test.
	* gcc.target/s390/target-attribute/tattr-4.c: New test.
	* gcc.target/s390/target-attribute/tattr-5.c: New test.
	* gcc.target/s390/target-attribute/tattr-6.c: New test.
	* gcc.target/s390/target-attribute/tattr-7.c: New test.
	* gcc.target/s390/target-attribute/tattr-8.c: New test.
	* gcc.target/s390/target-attribute/tattr-9.c: New test.
	* gcc.target/s390/target-attribute/tattr-10.c: New test.
	* gcc.target/s390/target-attribute/tattr-11.c: New test.
	* gcc.target/s390/target-attribute/tattr-12.c: New test.
	* gcc.target/s390/target-attribute/tattr-13.c: New test.
	* gcc.target/s390/target-attribute/tattr-14.c: New test.
	* gcc.target/s390/target-attribute/tattr-15.c: New test.
	* gcc.target/s390/target-attribute/tattr-16.c: New test.
	* gcc.target/s390/target-attribute/tattr-17.c: New test.
	* gcc.target/s390/target-attribute/tattr-18.c: New test.
	* gcc.target/s390/target-attribute/tattr-19.c: New test.
	* gcc.target/s390/target-attribute/tattr-arch-tune-1.c: New test.
	* gcc.target/s390/target-attribute/tattr-arch-tune-2.c: New test.
	* gcc.target/s390/target-attribute/tattr-m31-1.c: New test.
	* gcc.target/s390/target-attribute/tattr-m31-2.c: New test.
	* gcc.target/s390/target-attribute/tattr-m31-3.c: New test.
	* gcc.target/s390/target-attribute/tattr-m31-4.c: New test.
	* gcc.target/s390/target-attribute/tattr-m31-5.c: New test.
	* gcc.target/s390/target-attribute/tattr-m31-6.c: New test.
	* gcc.target/s390/target-attribute/tattr-m31-7.c: New test.
	* gcc.target/s390/target-attribute/tattr-m31-8.c: New test.
	* gcc.target/s390/target-attribute/tattr-m31-9.c: New test.
	* gcc.target/s390/target-attribute/tattr-m31-10.c: New test.
	* gcc.target/s390/target-attribute/tattr-m31-11.c: New test.
	* gcc.target/s390/target-attribute/tattr-m31-12.c: New test.
	* gcc.target/s390/target-attribute/tattr-m31-13.c: New test.
	* gcc.target/s390/target-attribute/tattr-m31-14.c: New test.
	* gcc.target/s390/target-attribute/tattr-m31-15.c: New test.
	* gcc.target/s390/target-attribute/tattr-m31-16.c: New test.
	* gcc.target/s390/target-attribute/tattr-m31-17.c: New test.
	* gcc.target/s390/target-attribute/tattr-m31-18.c: New test.
	* gcc.target/s390/target-attribute/tattr-m31-19.c: New test.
	* gcc.target/s390/target-attribute/tattr-m31-20.c: New test.
	* gcc.target/s390/target-attribute/tattr-m31-21.c: New test.
	* gcc.target/s390/target-attribute/tattr-m31-22.c: New test.
	* gcc.target/s390/target-attribute/tattr-m31-23.c: New test.
	* gcc.target/s390/target-attribute/tattr-m31-24.c: New test.
	* gcc.target/s390/target-attribute/tattr-m31-25.c: New test.
	* gcc.target/s390/target-attribute/tattr-m31-26.c: New test.
	* gcc.target/s390/target-attribute/tattr-m31-27.c: New test.
	* gcc.target/s390/target-attribute/tattr-m31-28.c: New test.
	* gcc.target/s390/target-attribute/tattr-m31-29.c: New test.
	* gcc.target/s390/target-attribute/tattr-m31-30.c: New test.
	* gcc.target/s390/target-attribute/tattr-m31-31.c: New test.
	* gcc.target/s390/target-attribute/tattr-m31-32.c: New test.
	* gcc.target/s390/target-attribute/tattr-m64-1.c: New test.
	* gcc.target/s390/target-attribute/tattr-m64-2.c: New test.
	* gcc.target/s390/target-attribute/tattr-m64-3.c: New test.
	* gcc.target/s390/target-attribute/tattr-m64-4.c: New test.
	* gcc.target/s390/target-attribute/tattr-m64-5.c: New test.
	* gcc.target/s390/target-attribute/tattr-m64-6.c: New test.
	* gcc.target/s390/target-attribute/tattr-m64-7.c: New test.
	* gcc.target/s390/target-attribute/tattr-m64-8.c: New test.
	* gcc.target/s390/target-attribute/tattr-m64-9.c: New test.
	* gcc.target/s390/target-attribute/tattr-m64-10.c: New test.
	* gcc.target/s390/target-attribute/tattr-m64-11.c: New test.
	* gcc.target/s390/target-attribute/tattr-m64-12.c: New test.
	* gcc.target/s390/target-attribute/tattr-m64-13.c: New test.
	* gcc.target/s390/target-attribute/tattr-m64-14.c: New test.
	* gcc.target/s390/target-attribute/tattr-m64-15.c: New test.
	* gcc.target/s390/target-attribute/tattr-m64-16.c: New test.
	* gcc.target/s390/target-attribute/tattr-m64-17.c: New test.
	* gcc.target/s390/target-attribute/tattr-m64-18.c: New test.
	* gcc.target/s390/target-attribute/tattr-m64-19.c: New test.
	* gcc.target/s390/target-attribute/tattr-m64-20.c: New test.
	* gcc.target/s390/target-attribute/tattr-m64-21.c: New test.
	* gcc.target/s390/target-attribute/tattr-m64-22.c: New test.
	* gcc.target/s390/target-attribute/tattr-m64-23.c: New test.
	* gcc.target/s390/target-attribute/tattr-m64-24.c: New test.
	* gcc.target/s390/target-attribute/tattr-m64-25.c: New test.
	* gcc.target/s390/target-attribute/tattr-m64-26.c: New test.
	* gcc.target/s390/target-attribute/tattr-m64-27.c: New test.
	* gcc.target/s390/target-attribute/tattr-m64-28.c: New test.
	* gcc.target/s390/target-attribute/tattr-m64-29.c: New test.
	* gcc.target/s390/target-attribute/tattr-m64-30.c: New test.
	* gcc.target/s390/target-attribute/tattr-m64-31.c: New test.
	* gcc.target/s390/target-attribute/tattr-m64-32.c: New test.
	* gcc.target/s390/target-attribute/tpragma-struct-vx-2.c: New test.
	* gcc.target/s390/s390.exp (check_effective_target_target_attribute):
	Add check whether target attribute is available.
	Run test in target-attribute subdir.
	* gcc.target/s390/s390-c++.exp
	(check_effective_target_target_attribute): Likewise.

From-SVN: r231271

gcc/
	* c-family/c-common.c (c_common_attribute_table[]): Update max arguments
	count for "simd" attribute.
	(handle_simd_attribute): Parse "notinbranch" and "inbranch" arguments.
	* doc/extend.texi ("simd"): Describe new flags.
gcc/testsuite/
	* c-c++-common/attr-simd-4.c: New test.
	* c-c++-common/attr-simd-5.c: New test.

From-SVN: r231270

gcc/

	* config/i386/sse.md (<avx512>_store<mode>_mask): Fix
	operand checked for alignment.

From-SVN: r231269

	* config/nvptx/nvptx.c (write_one_arg): Deal with prologue
	emission too. Change 'no_arg_types' to 'prototyped'.
	(write_fn_proto):  Use write_one_arg for stdarg, static chain &
	main.
	(nvptx_declare_function_name): Use write_one_arg for prologue copies.

From-SVN: r231267

From-SVN: r231266

2015-12-04  Richard Biener  <rguenther@suse.de>

	* tree-ssa-sccvn.c (sccvn_dom_walker): Add unreachable_dom
	member and initialize it.
	(sccvn_dom_walker::after_dom_children): Reset unreachable_dom
	if necessary.
	(sccvn_dom_walker::before_dom_children): If unreachable_dom
	is set BB is not reachable either.  Set unreachable_dom
	if not set and BB is unreachable.

From-SVN: r231262

2015-12-04  Richard Biener  <rguenther@suse.de>

	* bitmap.c (bitmap_find_bit): Guard the bitmap descriptor
	query with GATHER_STATISTICS.

From-SVN: r231261

	PR middle-end/65958
	* gimplify.c (struct gimplify_ctx): Turn boolean fields into 1-bit
	fields, add keep_stack and reorder them.
	(gimplify_bind_expr): Save gimplify_ctxp->keep_stack on entry then
	set it to false.  Do not insert a stack save/restore pair if it has
	been set to true by the gimplification of the statements.
	Restore it to the saved value on exit if it is still false.
	(gimplify_vla_decl): Do not set gimplify_ctxp->save_stack here.
	(gimplify_call_expr) <BUILT_IN_ALLOCA[_WITH_ALIGN]>: New case.  Set
	either save_stack or keep_stack depending on CALL_ALLOCA_FOR_VAR_P.
	* doc/extend.texi (Variable Length): Document new behavior.
	* doc/generic.texi (Blocks): Document new handling of VLAs.

From-SVN: r231260

	PR middle-end/65958
	* config/aarch64/aarch64-protos.h (aarch64_output_probe_stack-range):
	Declare.
	* config/aarch64/aarch64.md: Declare UNSPECV_BLOCKAGE and
	UNSPEC_PROBE_STACK_RANGE.
	(blockage): New instruction.
	(probe_stack_range_<PTR:mode>): Likewise.
	* config/aarch64/aarch64.c (aarch64_emit_probe_stack_range): New
	function.
	(aarch64_output_probe_stack_range): Likewise.
	(aarch64_expand_prologue): Invoke aarch64_emit_probe_stack_range if
	static builtin stack checking is enabled.
	* config/aarch64/aarch64-linux.h (STACK_CHECK_STATIC_BUILTIN):
	Define to 1.

Co-Authored-By: Tristan Gingold <gingold@adacore.com>

From-SVN: r231259

2015-12-04  Richard Biener  <rguenther@suse.de>

	PR testsuite/68681
	* gcc.dg/vect/pr45752.c: Add --param tree-reassoc-width=1.

From-SVN: r231253

	PR target/68214
	* config/arm/arm.md (*call_mem): Delete pattern.
	(*call_value_mem): Likewise.
	* config/arm/arm.c (output_call_mem): Delete.
	* config/arm/arm-protos.h (output_call_mem): Delete prototype.

From-SVN: r231252

	* config/aarch64/atomics.md (atomic_store<mode>): Use predicate
	aarch64_sync_memory_operand.

From-SVN: r231251

	* c-tree.h (c_build_va_arg): Adjust prototype.
	* c-parser.c (c_parser_postfix_expression): Adjust call to above.
	* c-typeck.c (c_build_va_arg): Rename LOC parameter to LOC2, add LOC1
	parameter, adjust throughout and issue an error if EXPR is a component
	with reverse storage order.

From-SVN: r231250

	PR target/68655
	* config/i386/i386.c (canonicalize_vector_int_perm): New function.
	(expand_vec_perm_1): Use it and recurse if everything else
	failed.  Use nd.perm instead of perm2.
	(expand_vec_perm_even_odd_1): If testing_p, use gen_raw_REG
	instead of gen_lowpart for the target.
	(ix86_expand_vec_perm_const_1): Use canonicalize_vector_int_perm
	and recurse if everything else failed.

	* gcc.dg/torture/vshuf-4.inc (TESTS): Add one extra test.
	* gcc.dg/torture/vshuf-4.inc (TESTS): Add two extra tests.

From-SVN: r231247

2015-12-04  Richard Biener  <rguenther@suse.de>

	PR middle-end/68636
	* builtins.c (get_pointer_alignment_1): Take care of byte to
	bit alignment computation overflow.

From-SVN: r231246

re PR middle-end/67438 (~X op ~Y pattern relocation causes loop performance degradation on 32bit x86)

2015-12-04  Richard Biener  <rguenther@suse.de>

	PR middle-end/67438
	* match.pd: Guard ~X cmp ~Y -> Y cmp X and the variant with
	a constant with single_use.

From-SVN: r231245

aarch64.c (aarch64_legitimize_address): legitimize address expressions like Ra + Rb + CONST and Ra + Rb<<SCALE + CONST.


	* config/aarch64/aarch64.c (aarch64_legitimize_address): legitimize
	address expressions like Ra + Rb + CONST and Ra + Rb<<SCALE + CONST.


Co-Authored-By: Jiong Wang <jiong.wang@arm.com>

From-SVN: r231244

	gcc/cp/
	* parser.c (cp_ensure_no_oacc_routine): Update error message.
	(cp_parser_oacc_routine): Likewise.
	(cp_parser_late_parsing_oacc_routine): Likewise.  Update comment
	describing this function.
	(cp_finalize_oacc_routine): Update error message.

From-SVN: r231243

From-SVN: r231242

	Short circuit for !flag_strict_aliasing
	(get_alias_set): Remove flag_strict_aliasing check.
	(new_alias_set): Likewise.

From-SVN: r231239

gcc/
	* config/aarch64/aarch64-cores.def: Use the Exynos M1 cost model.
	* config/aarch64/aarch64.c (exynosm1_addrcost_table): New variable.
	(exynosm1_regmove_cost): Likewise.
	(exynosm1_vector_cost): Likewise.
	(exynosm1_tunings): Likewise.
	* config/arm/aarch-cost-tables.h (exynosm1_extra_costs): Likewise.
	* config/arm/arm.c (arm_exynosm1_tune): Likewise.
	* config/arm/arm-cores.def: Use the Exynos M1 cost model.

From-SVN: r231233

	Alan Lawrence  <alan.lawrence@arm.com>
	Richard Biener  <richard.guenther@gmail.com>

	* cfgexpand.c (pass_expand::execute): Replace call to
	redirect_edge_var_map_destroy with redirect_edge_var_map_empty.
	* tree-ssa.c (delete_tree_ssa): Likewise.
	* function.c (set_cfun): Call redirect_edge_var_map_empty.
	* passes.c (execute_one_ipa_transform_pass, execute_one_pass): Likewise.
	* tree-ssa.h (redirect_edge_var_map_destroy): Remove.
	(redirect_edge_var_map_empty): New.
	* tree-ssa.c (redirect_edge_var_map_destroy): Remove.
	(redirect_edge_var_map_empty): New.

Co-Authored-By: Richard Biener <richard.guenther@gmail.com>

From-SVN: r231232

	PR tree-optimization/68599
	* loop-init.c (rtl_loop_init): Set LOOPS_HAVE_RECORDED_EXITS
	in call to loop_optimizer_init.
	* loop-iv.c (get_simple_loop_desc): Only allow unsafe loop
	optimization to drop the assumptions/infinite notations if
	the loop has a single exit.

From-SVN: r231231

As Bernd requested, this patch adds "This pattern cannot FAIL" to the
documentation of optabs that came to be mapped to interal functions.
For consistency I did the same for optabs that were already being
used for internal functions.

Many of the optabs weren't documented in the first place, so I added
entries for the missing ones.  Also, there were some inaccuracies in
the documentation of the rounding optabs.  The bitcount optabs said
that operand 0 has mode @var{m} and that operand 1 is under target
control, whereas it should be the other way around.

Tested on x86_64-linux-gnu.

gcc/
	* doc/md.texi (vec_load_lanes@var{m}@var{n}): Document that
	the pattern cannot FAIL.
	(vec_store_lanes@var{m}@var{n}): Likewise.
	(maskload@var{m}@var{n}): Likewise.
	(maskstore@var{m}@var{n}): Likewise.  Fix a cut-&-paste error
	in the name of the pattern.
	(rsqrt@var{m}2): Document that mode m must be a scalar or vector
	floating-point mode and that all operands have that mode.
	(fmin@var{m}3, fmax@var{m}3): Likewise.  Document that the
	pattern cannot FAIL.
	(sqrt@var{m}2): Document that mode m must be a scalar or vector
	floating-point mode, that all operands have that mode, and that
	the patterns cannot FAIL.  Remove previous documentation referring
	to @code{double} and @code{float}.
	(fmod@var{m}3, remainder@var{m}3, cos@var{m}2, sin@var{m}2)
	(sincos@var{m}3, log@var{m}2, pow@var{m}3, atan2@var{m}3)
	(copysign@var{m}3): Likewise.
	(exp@var{m}2): Likewise.  Explicitly state the base.
	(floor@var{m}2): As for sqrt@var{m}2, but also specify the operands.
	(btrunc@var{m}2, rint@var{m}2): Likewise.
	(round@var{m}2): Likewise.  Fix incorrect description of rounding
	effect.
	(ceil@var{m}2): As for round@var{m}2.
	(nearbyint@var{m}2): As for floor@var{m}2, but also mention that
	the instruction must not raise an inexact condition.
	(scalb@var{m}3): Document previously-undocumented pattern
	(ldexp@var{m}3, tan@var{m}2, asin@var{m}2, acos@var{m}2)
	(atan@var{m}2, expm1@var{m}2, exp10@var{m}2, exp2@var{m}2)
	(log1p@var{m}2, log10@var{m}2, log2@var{m}2, logb@var{m}2)
	(significand@var{m}2): Likewise.
	(ffs@var{m}2): Fix the description of the modes, so that operand 1 has
	mode m and operand 0 is defined more freely.  Document that @var{m}
	can be a scalar or vector integer mode and that the pattern is not
	allowed to FAIL.
	(clz@var{m}2, ctz@var{m}2, popcount@var{m}2, parity@var{m}2): Likewise.
	(clrsb@var{m}2): Likewise, except that the description of the
	mode was missing in this case.

From-SVN: r231230

All current uses of builtin_reciprocal convert 1.0/sqrt into rsqrt.
This patch adds an rsqrt optab and associated internal function for
that instead.  We can then pick up the vector forms of rsqrt automatically,
fixing an AArch64 regression from my internal_fn patches.

With that change, builtin_reciprocal only needs to handle target-specific
built-in functions.  I've restricted the hook to those since, if we need
a reciprocal of another standard function later, I think there should be
a strong preference for adding a new optab and internal function for it,
rather than hiding the code in a backend.

Three targets implement builtin_reciprocal: aarch64, i386 and rs6000.
i386 and rs6000 already used the obvious rsqrt<mode>2 pattern names
for the instructions, so they pick up the new code automatically.
aarch64 needs a slight rename.

mn10300 is unusual in that its native operation is rsqrt, and
sqrt is approximated as 1.0/rsqrt.  The port also uses rsqrt<mode>2
for the rsqrt pattern, so after the patch we now pick it up as a native
operation.

Two other ports define rsqrt patterns: sh and v850.  AFAICT these
patterns aren't currently used, but I think the patch does what the
authors of the patterns would have expected.  There's obviously some
risk of fallout though.

Tested on x86_64-linux-gnu, aarch64-linux-gnu, arm-linux-gnueabihf
(as a target without the hooks) and powerpc64-linux-gnu.

gcc/
	* internal-fn.def (RSQRT): New function.
	* optabs.def (rsqrt_optab): New optab.
	* doc/md.texi (rsqrtM2): Document.
	* target.def (builtin_reciprocal): Replace gcall argument with
	a function decl.  Restrict hook to machine functions.
	* doc/tm.texi: Regenerate.
	* targhooks.h (default_builtin_reciprocal): Update prototype.
	* targhooks.c (default_builtin_reciprocal): Likewise.
	* tree-ssa-math-opts.c: Include internal-fn.h.
	(internal_fn_reciprocal): New function.
	(pass_cse_reciprocals::execute): Call it, and build a call to an
	internal function on success.  Only call targetm.builtin_reciprocal
	for machine functions.
	* config/aarch64/aarch64-protos.h (aarch64_builtin_rsqrt): Remove
	second argument.
	* config/aarch64/aarch64-builtins.c (aarch64_expand_builtin_rsqrt):
	Rename aarch64_rsqrt_<mode>2 to rsqrt<mode>2.
	(aarch64_builtin_rsqrt): Remove md_fn argument and only handle
	machine functions.
	* config/aarch64/aarch64.c (use_rsqrt_p): New function.
	(aarch64_builtin_reciprocal): Replace gcall argument with a
	function decl.  Use use_rsqrt_p.  Remove optimize_size check.
	Only handle machine functions.  Update call to aarch64_builtin_rsqrt.
	(aarch64_optab_supported_p): New function.
	(TARGET_OPTAB_SUPPORTED_P): Define.
	* config/aarch64/aarch64-simd.md (aarch64_rsqrt_<mode>2): Rename to...
	(rsqrt<mode>2): ...this.
	* config/i386/i386.c (use_rsqrt_p): New function.
	(ix86_builtin_reciprocal): Replace gcall argument with a
	function decl.  Use use_rsqrt_p.  Remove optimize_insn_for_size_p
	check.  Only handle machine functions.
	(ix86_optab_supported_p): Handle rsqrt_optab.
	* config/rs6000/rs6000.c (TARGET_OPTAB_SUPPORTED_P): Define.
	(rs6000_builtin_reciprocal): Replace gcall argument with a
	function decl.  Remove optimize_insn_for_size_p check.
	Only handle machine functions.
	(rs6000_optab_supported_p): New function.

From-SVN: r231229

	PR target/68471
	PR target/68472
	* config/i386/i386.c (ix86_mitigate_rop): Don't call
	compute_bb_for_insn again.  Call df_insn_rescan_all.
	* config/i386/i386.md (set_got_rex64): Override modrm_class.

	* regrename.c (build_def_use): Ignore stack regs if regstack_completed.

testsuite/
	* gcc.target/i386/rop1.c: New test.

From-SVN: r231228

	gcc/
	* config/nvptx/nvptx-protos.h (npvptx_section_from_addr_space):	Delete.
	* config/nvptx/nvptx.c (enum nvptx_data_area): New.
	(SYMBOL_DATA_AREA, SET_SYMBOL_DATA_AREA): New defines.
	(nvptx_option_override): Set data ares for worker vars.
	(nvptx_addr_space_from_sym): Delete.
	(nvptx_encode_section_info): New.
	(section_for_sym, section_for_decl): New.
	(nvptx_maybe_convert_symbolic_operand): Get data area from symbol
	flags,
	(nvptx_section_from_addr_space): Delete.
	(nvptx_section_for_decl): Delete.
	(nvptx_output_aligned, nvptx_declare_object_name,
	nvptx_assemble_undefined_decl): Use section_for_decl, remove
	unnecessary checks.
	(nvptx_print_operand): Add 'D', adjust 'A'.
	(nvptx_expand_worker_addr): Adjust unspec generation.
	(TARGET_ENCODE_SECTION_INFO): Override.
	* config/nvptx/nvptx.h (ADDR_SPACE_GLOBAL, ADDR_SPACE_SHARED,
	ADDR_SPACE_CONST, ADDR_SPACE_LOCAL, ADDR_SPACE_PARAM): Delete.
	* config/nvptx/nvptx.md (UNSPEC_FROM_GLOBAL, UNSPEC_FROM_LOCAL,
	UNSPEC_FROM_PARAM, UNSPEC_FROM_SHARED, UNSPEC_FROM_CONST,
	UNSPEC_TO_GLOBAL, UNSPEC_TO_LOCAL, UNSPEC_TO_PARAM,
	UNSPEC_TO_SHARED, UNSPEC_TO_CONST): Delete.
	(UNSPEC_TO_GENERIC): New.
	(nvptx_register_or_symbolic_operand): Delete.
	(cvt_code, cvt_name, cvt_str): Delete.
	(convaddr_<cvt_name><mode> [P]): Delete.
	(convaddr_<mode> [P]): New.

	gcc/testsuite/
	* gcc.target/nvptx/decl.c: New.
	* gcc.target/nvptx/uninit-decl.c: Robustify regexps.

From-SVN: r231227

[RTL-ifcvt] PR rtl-optimization/68624: Clean up logic that checks for clobbering conflicts across basic blocks

	PR rtl-optimization/68624
	* ifcvt.c (noce_try_cmove_arith): Check clobbers of temp regs in both
	blocks if they exist and simplify the logic choosing the order to emit
	them in.

	* gcc.c-torture/execute/pr68624.c: New test.

From-SVN: r231226

2015-12-03  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/66051
	* tree-vect-slp.c (vect_build_slp_tree_1): Remove restriction
	on load group size.  Do not pass in vectorization_factor.
	(vect_transform_slp_perm_load): Do not require any permute support.
	(vect_build_slp_tree): Do not pass in vectorization factor.
	(vect_analyze_slp_instance): Do not compute vectorization
	factor estimate.  Use vector size instead of vectorization factor
	estimate to split store groups for BB vectorization.

	* gcc.dg/vect/slp-42.c: New testcase.

From-SVN: r231225

cfgexpand.c (expand_gimple_stmt_1): Return statement with DECL as return value is allowed to have NULL bounds.

gcc/

	* cfgexpand.c (expand_gimple_stmt_1): Return statement with
	DECL as return value is allowed to have NULL bounds.

From-SVN: r231224

2015-12-03  Tom de Vries  <tom@codesourcery.com>

	* graphite-isl-ast-to-gimple.c (binary_op_to_tree)
	(gcc_expression_from_isl_expr_op): Guard isl_ast_op_zdiv_r usage with
	HAVE_ISL_OPTIONS_SET_SCHEDULE_SERIALIZE_SCCS.

From-SVN: r231223

From-SVN: r231222

re PR tree-optimization/67800 (Missed vectorization opportunity on x86 (DOT_PROD_EXPR in non-reduction))

2015-12-03  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/67800
	PR tree-optimization/68333
	* tree-vect-patterns.c (vect_recog_dot_prod_pattern): Restore
	restriction to reduction contexts but allow SLP reductions as well.
	(vect_recog_sad_pattern): Likewise.
	(vect_recog_widen_sum_pattern): Likewise.

	* gcc.target/i386/vect-pr67800.c: New testcase.

From-SVN: r231221

2015-12-03  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/68639
	* tree-vect-data-refs.c (dr_group_sort_cmp): Split groups
	belonging to different loops.
	(vect_analyze_data_ref_accesses): Likewise.

	* gfortran.fortran-torture/compile/pr68639.f90: New testcase.

From-SVN: r231220

	* ipa-pure-const.c (ignore_edge_for_pure_const): New function.
	(propagate_pure_const): Use it; fix comments and optimize loops.

From-SVN: r231219

	* ipa-pure-const.c (ignore_edge): Rename to ...
	(ignore_edge_for_nothrow) ... this one; also ignore eges to
	interposable functions or ones that can not throw.
	(propagate_nothrow): Fix handling of availability.

From-SVN: r231218

	PR ipa/68184
	* g++.dg/torture/pr68184.C: New testcase.
	* cgraphunit.c (cgraph_node::analyze): Set can_throw_external.

From-SVN: r231217

From-SVN: r231216