In this patch, loop unroll adjust hook is introduced for powerpc.  We
can do target related heuristic adjustment in this hook.  In this patch,
-funroll-loops is enabled for small loops at O2 and above with an option
-munroll-small-loops to guard the small loops unrolling, and it works
fine with -flto.


gcc/
2019-11-11  Jiufu Guo  <guojiufu@linux.ibm.com>

	PR tree-optimization/88760
	* gcc/config/rs6000/rs6000.opt (-munroll-only-small-loops): New option.
	* gcc/common/config/rs6000/rs6000-common.c
	(rs6000_option_optimization_table) [OPT_LEVELS_2_PLUS_SPEED_ONLY]:
	Turn on -funroll-loops and -munroll-only-small-loops.
	[OPT_LEVELS_ALL]: Turn off -fweb and -frename-registers.
	* config/rs6000/rs6000.c (rs6000_option_override_internal): Remove
	set of PARAM_MAX_UNROLL_TIMES and PARAM_MAX_UNROLLED_INSNS.
	Turn off -munroll-only-small-loops for explicit -funroll-loops.
	(TARGET_LOOP_UNROLL_ADJUST): Add loop unroll adjust hook.
	(rs6000_loop_unroll_adjust): Define it.  Use -munroll-only-small-loops.

gcc.testsuite/
2019-11-11  Jiufu Guo  <guojiufu@linux.ibm.com>

	PR tree-optimization/88760
	* gcc.dg/pr59643.c: Update back to r277550.

From-SVN: r278034

To align with rs6000_insn_cost costing more for load type insns,
this patch is to make load insns cost more in vectorization cost
function.  The latency of load insns is about twice that of
"simple" instructions; 2 vs. 1 on older cores, and 4 (or so) vs.
2 on newer cores.  Considering that the result of load usually
is used somehow later (true-dep) but store won't, we keep the
store as before.

The SPEC2017 performance evaluation on Power8 shows 525.x264_r
+9.56%, 511.povray_r +2.08%, 527.cam4_r 1.16% gains, no 
significant degradation, SPECINT geomean +0.88%, SPECFP geomean
+0.26%.

The SPEC2017 performance evaluation on Power9 shows no significant
improvement or degradation, SPECINT geomean +0.04%, SPECFP geomean
+0.04%.

The SPEC2006 performance evaluation on Power8 shows 454.calculix
+4.41% gain but 416.gamess -1.19% and 453.povray -3.83% degradation.
I looked into the two degradation bmks, the degradation were NOT
due to hotspot changes by vectorization, were all side effects.
SPECINT geomean +0.10%, SPECFP geomean no changed considering
the degradation.

gcc/ChangeLog

2019-11-11  Kewen Lin  <linkw@gcc.gnu.org>

    * config/rs6000/rs6000.c (rs6000_builtin_vectorization_cost): Make
    scalar_load, vector_load, unaligned_load and vector_gather_load cost
    more to conform hardware latency and insn cost settings.

From-SVN: r278033

From-SVN: r278032

Some of the solution to PR71767 is incomplete, and we need finer-grained
control over whether symbols need to be made linker-visible.  This is a
preparation patch, providing the flag.

gcc/ChangeLog:

2019-11-10  Iain Sandoe  <iain@sandoe.co.uk>

	* config/darwin.h (MACHO_SYMBOL_FLAG_LINKER_VIS): New.
	(MACHO_SYMBOL_LINKER_VIS_P): New.

From-SVN: r278028

As part of PR 91413, GFortran now prints a warning when a variable is
moved from the stack to static storage. However, when the user
explicitly specifies that all local variables should be put in static
storage with the -fno-automatic option, don't print this warning.

Regtested on x86_64-pc-linux-gnu, committed as obvious.

gcc/fortran/ChangeLog:

2019-11-10  Janne Blomqvist  <jb@gcc.gnu.org>

	PR fortran/91413
	* trans-decl.c (gfc_finish_var_decl): Don't print warning when
	-fno-automatic is enabled.

From-SVN: r278027

This paper was delayed until the February meeting in Prague so that we could
get a better idea of what the impact on existing code would actually be.  To
that end, I'm implementing it now.

	* typeck2.c (check_narrowing): Treat pointer->bool as a narrowing
	conversion with -std=c++2a.

From-SVN: r278026

re PR fortran/92123 ([F2018/array-descriptor]  Scalar allocatable/pointer with array descriptor (via bind(C)): ICE with select rank or error scalar variable with POINTER or ALLOCATABLE in procedure with BIND(C) is not yet supported)

2019-11-10  Paul Thomas  <pault@gcc.gnu.org>

	PR fortran/92123
	*decl.c (gfc_verify_c_interop_param): Remove error asserting
	that pointer or allocatable variables in a bind C procedure are
	not supported. Delete some trailing spaces.
	* trans-stmt.c (trans_associate_var): Correct the attempt to
	treat scalar pointer or allocatable temporaries as if they are
	array descriptors.

2019-11-10  Paul Thomas  <pault@gcc.gnu.org>

	PR fortran/92123
	* gfortran.dg/bind_c_procs_3.f90 : New test.
	* gfortran.dg/ISO_Fortran_binding_15.c : New test.
	* gfortran.dg/ISO_Fortran_binding_15.f90 : Additional source.

From-SVN: r278025

The liveness of eliminable hard registers is not tracked by LRA between
basic blocks, so they should not be used as spill registers as LRA may
decide to allocate them to pseudos while the spilled value is still live.

2019-11-10  Kwok Cheung Yeung  <kcy@codesourcery.com>

	gcc/
	* lra-spills.c (assign_spill_hard_regs): Do not spill into
	registers in eliminable_regset.

From-SVN: r278024

	* ipa-inline.c (compute_uninlined_call_time,
	compute_inlined_call_time): Take edge frequency as
	parameter rather than computing it by itself.
	(big_speedup_p, edge_badness): Manually CSE sreal
	frequency calculations.

From-SVN: r278023

        * profile-count.c (profile_count::to_sreal_scale): Short circuit
	case where profiles are same.

From-SVN: r278022

From-SVN: r278021

ipa-prop.c (ipa_propagate_indirect_call_infos): Remove ipa edge args summaries of inlined edge unless...

	* ipa-prop.c (ipa_propagate_indirect_call_infos): Remove ipa edge
	args summaries of inlined edge unless it holds info about
	described reference.

From-SVN: r278020

	* doc/xml/manual/using.xml: Switch www.hboehm.info to https.

From-SVN: r278019

Sometimes combine wants to do a move in CCFPmode, but we don't currently
handle moves in any CC mode other than CCmode.  Fix that oversight.


	* config/rs6000/rs6000.md (CC_any): New mode iterator.
	(*movcc_internal1): Rename to...
	(*movcc_<mode> for CC_any): ... this.  Support moves of all CC modes.

From-SVN: r278017

	* cgraph.h (struct cgraph_node): Add ipcp_clone flag.
	(cgraph_node::create_virtual_clone): Copy it.
	* ipa-cp.c (ipcp_versionable_function_p): Watch for missing
	summaries.
	(ignore_edge_p): If caller has ipa-cp disabled, skip the edge, too.
	(ipcp_verify_propagated_values): Do not verify nodes where ipcp
	is disabled.
	(propagate_constants_across_call): If callee is not analyzed, give up.
	(propagate_constants_topo): Lower to bottom latties of all callees of
	functions with ipa-cp disabled.
	(ipcp_propagate_stage): Skip functions with ipa-cp disabled.
	(cgraph_edge_brings_value_p): Check for availability first.
	(create_specialized_node): Set ipcp_clone.
	(ipcp_store_bits_results): Check that info is present.
	* ipa-fnsummary.c (evaluate_properties_for_edge): Do not analyze
	thunks.
	(ipa_call_context::duplicate_from, ipa_call_context::equal_to): Be
	conservative when callee summary is missing.
	(remap_edge_summaries): Lookup call summary only when needed.
	* ipa-icf.c (sem_function::param_used_p): Be ready for missing summary.
	* ipa-prpo.c (ipa_alloc_node_params, ipa_initialize_node_params):
	Use get_create.
	(ipa_analyze_node): Use get_create.
	(propagate_controlled_uses): Do not propagate when function is not
	analyzed.
	(ipa_propagate_indirect_call_infos): Remove summary of inline clone.
	(ipa_read_node_info): Use get_create.
	* ipa-prop.h (IPA_NODE_REF): Use get.
	(IPA_NODE_REF_GET_CREATE): New.

From-SVN: r278016

From-SVN: r278013

	* ipa-fnsummary.c (evaluate_properties_for_edge): Call IPA_NODE_REF
	on function symbol.
	* gcc.dg/tree-ssa/pr46076.c: Make tested code hot.

From-SVN: r278009

tree.c (fld_incomplete_type_of): Clear TYPE_FINAL_P, TYPE_EMPTY_P, ENUM_IS_OPAQUE and ENUM_IS_SCOPED.

	* tree.c (fld_incomplete_type_of): Clear TYPE_FINAL_P, TYPE_EMPTY_P,
	ENUM_IS_OPAQUE and ENUM_IS_SCOPED.
	(free_lang_data_in_binfo): Clear TREE_PUBLIC in BINFO
	(free_lang_data_in_type): Clear ENUM_IS_OPAQUE and ENUM_IS_SCOPED.

From-SVN: r278008

	* ipa-inline-analysis.c (do_estimate_growth_1): Add support for
	capping the growth cumulated.
	(offline_size): Break out from ...
	(estimate_growth): ... here.
	(check_callers): Add N, OFFLINE and MIN_SIZE and KNOWN_EDGE
	parameters.
	(growth_likely_positive): Turn to ...
	(growth_positive_p): Re-implement.
	* ipa-inline.h (growth_likely_positive): Remove.
	(growth_positive_p): Declare.
	* ipa-inline.c (want_inline_small_function_p): Use
	growth_positive_p.
	(want_inline_function_to_all_callers_p): Likewise.

From-SVN: r278007

	* ipa-fnsummary.c (ipa_call_context::estimate_size_and_time): Fix
	calculation of min_size.
	(ipa_update_overall_fn_summary): Likewise.

From-SVN: r278006

ipa-fnsummary.c (estimate_edge_size_and_time): Do not call estimate_edge_devirt_benefit when not computing hints...


	* ipa-fnsummary.c (estimate_edge_size_and_time): Do not call
	estimate_edge_devirt_benefit when not computing hints;
	do not compute time when not asked for.
	(estimate_calls_size_and_time): Pass NULL hints and time when
	these are not computed; do not evaluate hint predicates when these are
	not computed.
	(ipa_merge_fn_summary_after_inlining): Do not re-evaluate edge
	frequency.

From-SVN: r278005

	PR tree-optimization/92401
	* gimple-match-head.c (gimple_resimplify1): Call const_unop only
	if res_op->code is an expression with code length 1.
	* gimple-match-head.c (gimple_resimplify2): Call const_binop only
	if res_op->code is an expression with code length 2.
	* gimple-match-head.c (gimple_resimplify3): Call fold_ternary only
	if res_op->code is an expression with code length 3.

	* g++.dg/opt/pr92401.C: New test.

From-SVN: r278004

2019-11-09  Thomas Koenig  <tkoenig@gcc.gnu.org>

	PR fortran/92321
	* frontend-passes.c (call_external_blas): Commit symbol for
	external BLAS routine.

2019-11-09  Thomas Koenig  <tkoenig@gcc.gnu.org>

	PR fortran/92321
	* gfortran.dg/matmul_blas_2.f90: New test.

From-SVN: r278003

When a stub is used to call the mcount function, the code is already
marking it as used unconditionally;  This is the only use of the so-
called validation outside darwin.{h,c}.  This moves the 'validation'
into darwin.c which is a step towards making validation routine local.

gcc/

2019-11-09  Iain Sandoe  <iain@sandoe.co.uk>

	* config/darwin.c (machopic_mcount_stub_name): Validate the
	symbol stub name when it is created.
	* config/i386/darwin.h (FUNCTION_PROFILER): Remove the symbol
	stub validation.

From-SVN: r278000

From-SVN: r277999

	* symtab.c: Fix comment typos.
	* cgraphunit.c: Likewise.
	* cgraph.h: Likewise.
	* cgraphclones.c: Likewise.
	* cgraph.c: Likewise.
	* varpool.c: Likewise.
	* tree-ssa-strlen.c: Likewise.
	* ipa-sra.c: Likewise.
	(scan_expr_access, check_all_callers_for_issues): Fix typo
	in a dump message.

From-SVN: r277995

	* gfortran.dg/dec_char_conversion_in_assignment_4.f90: Use
	dg-do compile instead of dg-do run.
	* gfortran.dg/dec_char_conversion_in_data_3.f90: Likewise.

From-SVN: r277994

The Darwin protos header is missing an include guard, this adds one.

gcc/ChangeLog:

2019-11-08  Iain Sandoe  <iain@sandoe.co.uk>

	* config/darwin-protos.h: Add include quard.

From-SVN: r277993

I noticed that for code like

  struct S {
    int *foo : 3;
  };

we generate nonsensical

  r.C:2:8: error: function definition does not declare parameters
      2 |   int *foo : 3;

It talks about a function because after parsing the declspecs of 'foo' we don't
see either ':' or "name :", so we think it's not a bit-field decl.  So we parse
the declarator and since a ctor-initializer begins with a ':', we try to parse
it as a function body, generating the awful diagnostic.  With this patch, we
issue:

  r.C:2:8: error: bit-field ‘foo’ has non-integral type ‘int*’
      2 |   int *foo : 3;

	* parser.c (cp_parser_member_declaration): Add a diagnostic for
	bit-fields with non-integral types.

	* g++.dg/diagnostic/bitfld4.C: New test.

From-SVN: r277991

	* g++.dg/cpp2a/constinit15.C: New test.

From-SVN: r277990

2019-11-08  Andrew MacLeod <amacleod@redhat.com>

	* range-op.h (range_operator::fold_range): Return result in a
	reference parameter instead of by value.
	(range_operator::wi_fold): Same.
	* range-op.cc (range_operator::wi_fold): Return result in a reference
	parameter instead of by value.
	(range_operator::fold_range): Same.
	(value_range_from_overflowed_bounds): Same.
	(value_range_with_overflow): Same
	(create_possibly_reversed_range): Same.
	(operator_equal::fold_range): Same.
	(operator_not_equal::fold_range): Same.
	(operator_lt::fold_range): Same.
	(operator_le::fold_range): Same.
	(operator_gt::fold_range): Same.
	(operator_ge::fold_range): Same.
	(operator_plus::wi_fold): Same.
	(operator_plus::op1_range): Change call to fold_range.
	(operator_plus::op2_range): Change call to fold_range.
	(operator_minus::wi_fold): Return result via reference parameter.
	(operator_minus::op1_range): Change call to fold_range.
	(operator_minus::op2_range): Change call to fold_range.
	(operator_min::wi_fold): Return result via reference parameter.
	(operator_max::wi_fold): Same.
	(cross_product_operator::wi_cross_product): Same.
	(operator_mult::wi_fold): Same.
	(operator_div::wi_fold): Same.
	(operator_div op_floor_div): Fix whitespace.
	(operator_exact_divide::op1_range): Change call to fold_range.
	(operator_lshift::fold_range): Return result via reference parameter.
	(operator_lshift::wi_fold): Same.
	(operator_rshift::fold_range): Same.
	(operator_rshift::wi_fold): Same.
	(operator_cast::fold_range): Same.
	(operator_cast::op1_range): Change calls to fold_range.
	(operator_logical_and::fold_range): Return result via reference.
	(wi_optimize_and_or): Adjust call to value_range_with_overflow.
	(operator_bitwise_and::wi_fold): Return result via reference.
	(operator_logical_or::fold_range): Same.
	(operator_bitwise_or::wi_fold): Same.
	(operator_bitwise_xor::wi_fold): Same.
	(operator_trunc_mod::wi_fold): Same.
	(operator_logical_not::fold_range): Same.
	(operator_bitwise_not::fold_range): Same.
	(operator_bitwise_not::op1_range): Change call to fold_range.
	(operator_cst::fold_range): Return result via reference.
	(operator_identity::fold_range): Same.
	(operator_abs::wi_fold): Same.
	(operator_absu::wi_fold): Same.
	(operator_negate::fold_range): Same.
	(operator_negate::op1_range): Change call to fold_range.
	(operator_addr_expr::fold_range): Return result via reference.
	(operator_addr_expr::op1_range): Change call to fold_range.
	(operator_pointer_plus::wi_fold): Return result via reference.
	(operator_pointer_min_max::wi_fold): Same.
	(operator_pointer_and::wi_fold): Same.
	(operator_pointer_or::wi_fold): Same.
	(range_op_handler): Change call to fold_range.
	(range_cast): Same.
	* tree-vrp.c (range_fold_binary_symbolics_p): Change call to
	fold_range.
	(range_fold_unary_symbolics_p): Same.
	(range_fold_binary_expr): Same.
	(range_fold_unary_expr): Same.

From-SVN: r277979

From-SVN: r277978

With the new reduction vectype handling, neutral_op_for_slp_reduction
needs to know whether the caller is using STMT_VINFO_REDUC_VECTYPE
(for an epilogue value) or STMT_VINFO_VECTYPE (for a PHI argument).

This fixes various gcc.target/aarch64/sve/slp_* tests.

2019-11-08  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
	* tree-vect-loop.c (neutral_op_for_slp_reduction): Take the
	vector type as an argument rather than reading it from the
	stmt_vec_info.
	(vect_create_epilog_for_reduction): Update accordingly.
	(vectorizable_reduction): Likewise.
	(vect_transform_cycle_phi): Likewise.

From-SVN: r277977

	* config/rs6000/predicates.md (branch_comparison_operator): Allow only
	the comparison codes that make sense for the mode used, and only the
	codes that can be done with a single branch instruction.

From-SVN: r277976

Allows character literals to used to assign values to non-character variables
in the same way that Hollerith constants are used. In addition character
literals can be used in data statements just like Hollerith constants.

Warnings of such use are output to discourage this usage as it is a non-standard
legacy feature and must be explicitly enabled.
 
Enabled by -fdec and -fdec-char-conversions.


Co-Authored-By: Jim MacArthur <jim.macarthur@codethink.co.uk>

From-SVN: r277975

gcc/ChangeLog:
2019-11-08  Andre Vieira  <andre.simoesdiasvieira@arm.com>

	PR tree-optimization/92351
	* tree-vect-data-refs.c (vect_compute_data_ref_alignment): When we are
	peeling the main loop for alignment, make sure to set the misalignment
	of the epilogue's data references to DR_MISALIGNMENT_UNKNOWN.

gcc/testsuite/ChangeLog:
2019-11-08  Andre Vieira  <andre.simoesdiasvieira@arm.com>

	PR tree-optimization/92351
	* gcc.dg/vect/vect-peel-2.c: Disable epilogue vectorization and
	split the source of this test to...
	* gcc.dg/vect/vect-peel-2-src.c: ... This.
	* gcc.dg/vect/vect-peel-2-epilogues.c: New test.

From-SVN: r277974

2019-11-08  Richard Biener  <rguenther@suse.de>

	* dbgcnt.def (ivopts_loop): Add.
	* tree-ssa-loop-ivopts.c (tree_ssa_iv_optimize): Check
	ivopts_loop before optimizing a loop.

From-SVN: r277973

2019-11-08  Richard Biener  <rguenther@suse.de>

	PR ipa/92409
	* tree-inline.c (declare_return_variable): Properly handle
	type mismatches for the return slot.

From-SVN: r277972

	* gcc.target/sparc/overflow-1.c: Add -fno-pie to the options.
	* gcc.target/sparc/overflow-2.c: Likewise.

From-SVN: r277969

	PR target/92095
	* config/sparc/sparc-protos.h (output_load_pcrel_sym): Declare.
	* config/sparc/sparc.c (sparc_cannot_force_const_mem): Revert latest
 	change.
	(got_helper_needed): New static variable.
	(output_load_pcrel_sym): New function.
	(get_pc_thunk_name): Remove after inlining...
	(load_got_register): ...here.  Rework the initialization of the GOT
	register and of the GOT helper.
	(save_local_or_in_reg_p): Test the REGNO of the GOT register.
	(sparc_file_end): Test got_helper_needed to decide whether the GOT
	helper must be emitted.  Use output_asm_insn instead of fprintf.
	(sparc_init_pic_reg): In PIC mode, always initialize the PIC register
	if optimization is enabled.
	* config/sparc/sparc.md (load_pcrel_sym<P:mode>): Emit the assembly
	by calling output_load_pcrel_sym.

From-SVN: r277966