This patch adds a static analysis pass to the middle-end, focusing
for this release on C code, and malloc/free issues in particular.

See:
 https://gcc.gnu.org/wiki/DavidMalcolm/StaticAnalyzer

gcc/ChangeLog:
	* Makefile.in (lang_opt_files): Add analyzer.opt.
	(ANALYZER_OBJS): New.
	(OBJS): Add digraph.o, graphviz.o, ordered-hash-map-tests.o,
	tristate.o and ANALYZER_OBJS.
	(TEXI_GCCINT_FILES): Add analyzer.texi.
	* common.opt (-fanalyzer): New driver option.
	* config.in: Regenerate.
	* configure: Regenerate.
	* configure.ac (--disable-analyzer, ENABLE_ANALYZER): New option.
	(gccdepdir): Also create depdir for "analyzer" subdir.
	* digraph.cc: New file.
	* digraph.h: New file.
	* doc/analyzer.texi: New file.
	* doc/gccint.texi ("Static Analyzer") New menu item.
	(analyzer.texi): Include it.
	* doc/invoke.texi ("Static Analyzer Options"): New list and new section.
	("Warning Options"): Add static analysis warnings to the list.
	(-Wno-analyzer-double-fclose): New option.
	(-Wno-analyzer-double-free): New option.
	(-Wno-analyzer-exposure-through-output-file): New option.
	(-Wno-analyzer-file-leak): New option.
	(-Wno-analyzer-free-of-non-heap): New option.
	(-Wno-analyzer-malloc-leak): New option.
	(-Wno-analyzer-possible-null-argument): New option.
	(-Wno-analyzer-possible-null-dereference): New option.
	(-Wno-analyzer-null-argument): New option.
	(-Wno-analyzer-null-dereference): New option.
	(-Wno-analyzer-stale-setjmp-buffer): New option.
	(-Wno-analyzer-tainted-array-index): New option.
	(-Wno-analyzer-use-after-free): New option.
	(-Wno-analyzer-use-of-pointer-in-stale-stack-frame): New option.
	(-Wno-analyzer-use-of-uninitialized-value): New option.
	(-Wanalyzer-too-complex): New option.
	(-fanalyzer-call-summaries): New warning.
	(-fanalyzer-checker=): New warning.
	(-fanalyzer-fine-grained): New warning.
	(-fno-analyzer-state-merge): New warning.
	(-fno-analyzer-state-purge): New warning.
	(-fanalyzer-transitivity): New warning.
	(-fanalyzer-verbose-edges): New warning.
	(-fanalyzer-verbose-state-changes): New warning.
	(-fanalyzer-verbosity=): New warning.
	(-fdump-analyzer): New warning.
	(-fdump-analyzer-callgraph): New warning.
	(-fdump-analyzer-exploded-graph): New warning.
	(-fdump-analyzer-exploded-nodes): New warning.
	(-fdump-analyzer-exploded-nodes-2): New warning.
	(-fdump-analyzer-exploded-nodes-3): New warning.
	(-fdump-analyzer-supergraph): New warning.
	* doc/sourcebuild.texi (dg-require-dot): New.
	(dg-check-dot): New.
	* gdbinit.in (break-on-saved-diagnostic): New command.
	* graphviz.cc: New file.
	* graphviz.h: New file.
	* ordered-hash-map-tests.cc: New file.
	* ordered-hash-map.h: New file.
	* passes.def (pass_analyzer): Add before
	pass_ipa_whole_program_visibility.
	* selftest-run-tests.c (selftest::run_tests): Call
	selftest::ordered_hash_map_tests_cc_tests.
	* selftest.h (selftest::ordered_hash_map_tests_cc_tests): New
	decl.
	* shortest-paths.h: New file.
	* timevar.def (TV_ANALYZER): New timevar.
	(TV_ANALYZER_SUPERGRAPH): Likewise.
	(TV_ANALYZER_STATE_PURGE): Likewise.
	(TV_ANALYZER_PLAN): Likewise.
	(TV_ANALYZER_SCC): Likewise.
	(TV_ANALYZER_WORKLIST): Likewise.
	(TV_ANALYZER_DUMP): Likewise.
	(TV_ANALYZER_DIAGNOSTICS): Likewise.
	(TV_ANALYZER_SHORTEST_PATHS): Likewise.
	* tree-pass.h (make_pass_analyzer): New decl.
	* tristate.cc: New file.
	* tristate.h: New file.

gcc/analyzer/ChangeLog:
	* ChangeLog: New file.
	* analyzer-selftests.cc: New file.
	* analyzer-selftests.h: New file.
	* analyzer.opt: New file.
	* analysis-plan.cc: New file.
	* analysis-plan.h: New file.
	* analyzer-logging.cc: New file.
	* analyzer-logging.h: New file.
	* analyzer-pass.cc: New file.
	* analyzer.cc: New file.
	* analyzer.h: New file.
	* call-string.cc: New file.
	* call-string.h: New file.
	* checker-path.cc: New file.
	* checker-path.h: New file.
	* constraint-manager.cc: New file.
	* constraint-manager.h: New file.
	* diagnostic-manager.cc: New file.
	* diagnostic-manager.h: New file.
	* engine.cc: New file.
	* engine.h: New file.
	* exploded-graph.h: New file.
	* pending-diagnostic.cc: New file.
	* pending-diagnostic.h: New file.
	* program-point.cc: New file.
	* program-point.h: New file.
	* program-state.cc: New file.
	* program-state.h: New file.
	* region-model.cc: New file.
	* region-model.h: New file.
	* sm-file.cc: New file.
	* sm-malloc.cc: New file.
	* sm-malloc.dot: New file.
	* sm-pattern-test.cc: New file.
	* sm-sensitive.cc: New file.
	* sm-signal.cc: New file.
	* sm-taint.cc: New file.
	* sm.cc: New file.
	* sm.h: New file.
	* state-purge.cc: New file.
	* state-purge.h: New file.
	* supergraph.cc: New file.
	* supergraph.h: New file.

gcc/testsuite/ChangeLog:
	* gcc.dg/analyzer/CVE-2005-1689-minimal.c: New test.
	* gcc.dg/analyzer/abort.c: New test.
	* gcc.dg/analyzer/alloca-leak.c: New test.
	* gcc.dg/analyzer/analyzer-decls.h: New header.
	* gcc.dg/analyzer/analyzer-verbosity-0.c: New test.
	* gcc.dg/analyzer/analyzer-verbosity-1.c: New test.
	* gcc.dg/analyzer/analyzer-verbosity-2.c: New test.
	* gcc.dg/analyzer/analyzer.exp: New suite.
	* gcc.dg/analyzer/attribute-nonnull.c: New test.
	* gcc.dg/analyzer/call-summaries-1.c: New test.
	* gcc.dg/analyzer/conditionals-2.c: New test.
	* gcc.dg/analyzer/conditionals-3.c: New test.
	* gcc.dg/analyzer/conditionals-notrans.c: New test.
	* gcc.dg/analyzer/conditionals-trans.c: New test.
	* gcc.dg/analyzer/data-model-1.c: New test.
	* gcc.dg/analyzer/data-model-2.c: New test.
	* gcc.dg/analyzer/data-model-3.c: New test.
	* gcc.dg/analyzer/data-model-4.c: New test.
	* gcc.dg/analyzer/data-model-5.c: New test.
	* gcc.dg/analyzer/data-model-5b.c: New test.
	* gcc.dg/analyzer/data-model-5c.c: New test.
	* gcc.dg/analyzer/data-model-5d.c: New test.
	* gcc.dg/analyzer/data-model-6.c: New test.
	* gcc.dg/analyzer/data-model-7.c: New test.
	* gcc.dg/analyzer/data-model-8.c: New test.
	* gcc.dg/analyzer/data-model-9.c: New test.
	* gcc.dg/analyzer/data-model-11.c: New test.
	* gcc.dg/analyzer/data-model-12.c: New test.
	* gcc.dg/analyzer/data-model-13.c: New test.
	* gcc.dg/analyzer/data-model-14.c: New test.
	* gcc.dg/analyzer/data-model-15.c: New test.
	* gcc.dg/analyzer/data-model-16.c: New test.
	* gcc.dg/analyzer/data-model-17.c: New test.
	* gcc.dg/analyzer/data-model-18.c: New test.
	* gcc.dg/analyzer/data-model-19.c: New test.
	* gcc.dg/analyzer/data-model-path-1.c: New test.
	* gcc.dg/analyzer/disabling.c: New test.
	* gcc.dg/analyzer/dot-output.c: New test.
	* gcc.dg/analyzer/double-free-lto-1-a.c: New test.
	* gcc.dg/analyzer/double-free-lto-1-b.c: New test.
	* gcc.dg/analyzer/double-free-lto-1.h: New header.
	* gcc.dg/analyzer/equivalence.c: New test.
	* gcc.dg/analyzer/explode-1.c: New test.
	* gcc.dg/analyzer/explode-2.c: New test.
	* gcc.dg/analyzer/factorial.c: New test.
	* gcc.dg/analyzer/fibonacci.c: New test.
	* gcc.dg/analyzer/fields.c: New test.
	* gcc.dg/analyzer/file-1.c: New test.
	* gcc.dg/analyzer/file-2.c: New test.
	* gcc.dg/analyzer/function-ptr-1.c: New test.
	* gcc.dg/analyzer/function-ptr-2.c: New test.
	* gcc.dg/analyzer/function-ptr-3.c: New test.
	* gcc.dg/analyzer/gzio-2.c: New test.
	* gcc.dg/analyzer/gzio-3.c: New test.
	* gcc.dg/analyzer/gzio-3a.c: New test.
	* gcc.dg/analyzer/gzio.c: New test.
	* gcc.dg/analyzer/infinite-recursion.c: New test.
	* gcc.dg/analyzer/loop-2.c: New test.
	* gcc.dg/analyzer/loop-2a.c: New test.
	* gcc.dg/analyzer/loop-3.c: New test.
	* gcc.dg/analyzer/loop-4.c: New test.
	* gcc.dg/analyzer/loop.c: New test.
	* gcc.dg/analyzer/malloc-1.c: New test.
	* gcc.dg/analyzer/malloc-2.c: New test.
	* gcc.dg/analyzer/malloc-3.c: New test.
	* gcc.dg/analyzer/malloc-callbacks.c: New test.
	* gcc.dg/analyzer/malloc-dce.c: New test.
	* gcc.dg/analyzer/malloc-dedupe-1.c: New test.
	* gcc.dg/analyzer/malloc-ipa-1.c: New test.
	* gcc.dg/analyzer/malloc-ipa-10.c: New test.
	* gcc.dg/analyzer/malloc-ipa-11.c: New test.
	* gcc.dg/analyzer/malloc-ipa-12.c: New test.
	* gcc.dg/analyzer/malloc-ipa-13.c: New test.
	* gcc.dg/analyzer/malloc-ipa-2.c: New test.
	* gcc.dg/analyzer/malloc-ipa-3.c: New test.
	* gcc.dg/analyzer/malloc-ipa-4.c: New test.
	* gcc.dg/analyzer/malloc-ipa-5.c: New test.
	* gcc.dg/analyzer/malloc-ipa-6.c: New test.
	* gcc.dg/analyzer/malloc-ipa-7.c: New test.
	* gcc.dg/analyzer/malloc-ipa-8-double-free.c: New test.
	* gcc.dg/analyzer/malloc-ipa-8-lto-a.c: New test.
	* gcc.dg/analyzer/malloc-ipa-8-lto-b.c: New test.
	* gcc.dg/analyzer/malloc-ipa-8-lto-c.c: New test.
	* gcc.dg/analyzer/malloc-ipa-8-lto.h: New test.
	* gcc.dg/analyzer/malloc-ipa-8-unchecked.c: New test.
	* gcc.dg/analyzer/malloc-ipa-9.c: New test.
	* gcc.dg/analyzer/malloc-macro-inline-events.c: New test.
	* gcc.dg/analyzer/malloc-macro-separate-events.c: New test.
	* gcc.dg/analyzer/malloc-macro.h: New header.
	* gcc.dg/analyzer/malloc-many-paths-1.c: New test.
	* gcc.dg/analyzer/malloc-many-paths-2.c: New test.
	* gcc.dg/analyzer/malloc-many-paths-3.c: New test.
	* gcc.dg/analyzer/malloc-paths-1.c: New test.
	* gcc.dg/analyzer/malloc-paths-10.c: New test.
	* gcc.dg/analyzer/malloc-paths-2.c: New test.
	* gcc.dg/analyzer/malloc-paths-3.c: New test.
	* gcc.dg/analyzer/malloc-paths-4.c: New test.
	* gcc.dg/analyzer/malloc-paths-5.c: New test.
	* gcc.dg/analyzer/malloc-paths-6.c: New test.
	* gcc.dg/analyzer/malloc-paths-7.c: New test.
	* gcc.dg/analyzer/malloc-paths-8.c: New test.
	* gcc.dg/analyzer/malloc-paths-9.c: New test.
	* gcc.dg/analyzer/malloc-vs-local-1a.c: New test.
	* gcc.dg/analyzer/malloc-vs-local-1b.c: New test.
	* gcc.dg/analyzer/malloc-vs-local-2.c: New test.
	* gcc.dg/analyzer/malloc-vs-local-3.c: New test.
	* gcc.dg/analyzer/malloc-vs-local-4.c: New test.
	* gcc.dg/analyzer/operations.c: New test.
	* gcc.dg/analyzer/params-2.c: New test.
	* gcc.dg/analyzer/params.c: New test.
	* gcc.dg/analyzer/paths-1.c: New test.
	* gcc.dg/analyzer/paths-1a.c: New test.
	* gcc.dg/analyzer/paths-2.c: New test.
	* gcc.dg/analyzer/paths-3.c: New test.
	* gcc.dg/analyzer/paths-4.c: New test.
	* gcc.dg/analyzer/paths-5.c: New test.
	* gcc.dg/analyzer/paths-6.c: New test.
	* gcc.dg/analyzer/paths-7.c: New test.
	* gcc.dg/analyzer/pattern-test-1.c: New test.
	* gcc.dg/analyzer/pattern-test-2.c: New test.
	* gcc.dg/analyzer/pointer-merging.c: New test.
	* gcc.dg/analyzer/pr61861.c: New test.
	* gcc.dg/analyzer/pragma-1.c: New test.
	* gcc.dg/analyzer/scope-1.c: New test.
	* gcc.dg/analyzer/sensitive-1.c: New test.
	* gcc.dg/analyzer/setjmp-1.c: New test.
	* gcc.dg/analyzer/setjmp-2.c: New test.
	* gcc.dg/analyzer/setjmp-3.c: New test.
	* gcc.dg/analyzer/setjmp-4.c: New test.
	* gcc.dg/analyzer/setjmp-5.c: New test.
	* gcc.dg/analyzer/setjmp-6.c: New test.
	* gcc.dg/analyzer/setjmp-7.c: New test.
	* gcc.dg/analyzer/setjmp-7a.c: New test.
	* gcc.dg/analyzer/setjmp-8.c: New test.
	* gcc.dg/analyzer/setjmp-9.c: New test.
	* gcc.dg/analyzer/signal-1.c: New test.
	* gcc.dg/analyzer/signal-2.c: New test.
	* gcc.dg/analyzer/signal-3.c: New test.
	* gcc.dg/analyzer/signal-4a.c: New test.
	* gcc.dg/analyzer/signal-4b.c: New test.
	* gcc.dg/analyzer/strcmp-1.c: New test.
	* gcc.dg/analyzer/switch.c: New test.
	* gcc.dg/analyzer/taint-1.c: New test.
	* gcc.dg/analyzer/zlib-1.c: New test.
	* gcc.dg/analyzer/zlib-2.c: New test.
	* gcc.dg/analyzer/zlib-3.c: New test.
	* gcc.dg/analyzer/zlib-4.c: New test.
	* gcc.dg/analyzer/zlib-5.c: New test.
	* gcc.dg/analyzer/zlib-6.c: New test.
	* lib/gcc-defs.exp (dg-check-dot): New procedure.
	* lib/target-supports.exp (check_dot_available): New procedure.
	(check_effective_target_analyzer): New.
	* lib/target-supports-dg.exp (dg-require-dot): New procedure.

I thought my earlier fix for 91930 was an obvious bug fix, but apparently an
inherited constructor does not count as user-declared.  So this patch
reverts that change and the other follow-on patches, and fixes 91930
differently, by not letting the inherited default constructor hide the
implicitly-declared default constructor.

	* class.c (add_method): A constrained inherited ctor doesn't hide an
	implicit derived ctor.

	Revert:
	PR c++/91930 - ICE with constrained inherited default ctor.
	* name-lookup.c (do_class_using_decl): Set TYPE_HAS_USER_CONSTRUCTOR
	for inherited constructor.
	PR c++/92552 - ICE with inherited constrained default ctor.
	* pt.c (instantiate_class_template_1): Copy
	TYPE_HAS_USER_CONSTRUCTOR.
	PR c++/92594 - ICE with inherited trivial default ctor.
	* method.c (trivial_fn_p): Treat an inherited default constructor
	like a normal default constructor.

https://gcc.gnu.org/ml/gcc-patches/2020-01/msg00809.html
	PR c++/90916
	* pt.c (retrieve_specialization): Get the TI from the decl or the
	classtype as appropriate.

	* config/i386/i386.md (*movsf_internal): Require SSE2 ISA for
	alternatives 9 and 10.

gcc/cp/ChangeLog:
	* cp-gimplify.c (source_location_table_entry_hash::empty_zero_p):
	New static constant.
	* cp-tree.h (named_decl_hash::empty_zero_p): Likewise.
	(struct named_label_hash::empty_zero_p): Likewise.
	* decl2.c (mangled_decl_hash::empty_zero_p): Likewise.

gcc/ChangeLog:
	* attribs.c (excl_hash_traits::empty_zero_p): New static constant.
	* gcov.c (function_start_pair_hash::empty_zero_p): Likewise.
	* graphite.c (struct sese_scev_hash::empty_zero_p): Likewise.
	* hash-map-tests.c (selftest::test_nonzero_empty_key): New selftest.
	(selftest::hash_map_tests_c_tests): Call it.
	* hash-map-traits.h (simple_hashmap_traits::empty_zero_p):
	New static constant, using the value of = H::empty_zero_p.
	(unbounded_hashmap_traits::empty_zero_p): Likewise, using the value
	from default_hash_traits <Value>.
	* hash-map.h (hash_map::empty_zero_p): Likewise, using the value
	from Traits.
	* hash-set-tests.c (value_hash_traits::empty_zero_p): Likewise.
	* hash-table.h (hash_table::alloc_entries): Guard the loop of
	calls to mark_empty with !Descriptor::empty_zero_p.
	(hash_table::empty_slow): Conditionalize the memset call with a
	check that Descriptor::empty_zero_p; otherwise, loop through the
	entries calling mark_empty on them.
	* hash-traits.h (int_hash::empty_zero_p): New static constant.
	(pointer_hash::empty_zero_p): Likewise.
	(pair_hash::empty_zero_p): Likewise.
	* ipa-devirt.c (default_hash_traits <type_pair>::empty_zero_p):
	Likewise.
	* ipa-prop.c (ipa_bit_ggc_hash_traits::empty_zero_p): Likewise.
	(ipa_vr_ggc_hash_traits::empty_zero_p): Likewise.
	* profile.c (location_triplet_hash::empty_zero_p): Likewise.
	* sanopt.c (sanopt_tree_triplet_hash::empty_zero_p): Likewise.
	(sanopt_tree_couple_hash::empty_zero_p): Likewise.
	* tree-hasher.h (int_tree_hasher::empty_zero_p): Likewise.
	* tree-ssa-sccvn.c (vn_ssa_aux_hasher::empty_zero_p): Likewise.
	* tree-vect-slp.c (bst_traits::empty_zero_p): Likewise.
	* tree-vectorizer.h
	(default_hash_traits<scalar_cond_masked_key>::empty_zero_p):
	Likewise.

Here we were getting confused about whether or not pod_tuple has a trivial
default constructor.  bar inherits the trivial e default constructor; the
effect of calling that inherited constructor is equivalent to calling a
defaulted default constructor in bar, so let's treat it as such.

	* method.c (trivial_fn_p): Treat an inherited default constructor
	like a normal default constructor.

There were two issues in this PR:

1) We were crashing in is_really_empty_class because we say that the
internal RTTI types are classes, but never gave them TYPE_BINFO.

2) We were allowing the cast to a different pointer type because STRIP_NOPS
in cxx_fold_indirect_ref ignored REINTERPRET_CAST_P.

	* rtti.c (get_tinfo_desc): Call xref_basetypes.
	* constexpr.c (cxx_fold_indirect_ref): Don't strip
	REINTERPRET_CAST_P.

I wonder why nobody fixed this until now; it's been two years since the
diagnostic context output was changed.

	* lib/prune.exp (prune_gcc_output): Adjust constexpr pattern.

GCC sources, it's auto-generated in $(builddir) during build.

	PR target/92055
	* contrib/gcc_update (files_and_dependencies): Remove
	entry for gcc/config/avr/t-multilib.

libgcc/
	* config/avr/lib1funcs.S (skip): Simplify.

Starting with the introduction of TYPE_TYPELESS_STORAGE the situation
of having a alias-set zero aggregate field became more common which
prevents recording alias-sets of fields of said aggregate as subset
of the outer aggregate.  component_uses_parent_alias_set_from in the
past fended off some of the issues with that but the alias oracles
use of the alias set of the base of an access path never appropriately
handled it.

The following makes it so that alias-sets of fields of alias-set zero
aggregate fields are still recorded as subset of the container.

2020-01-14  Richard Biener  <rguenther@suse.de>

	PR middle-end/93246
	* alias.c (record_component_aliases): Take superset to record
	into, recurse for alias-set zero fields.
	(record_component_aliases): New oveerload wrapping around the above.

	* g++.dg/torture/pr93246.C: New testcase.

Function average_num_loop_insns forgets to free loop body in early
return.  Besides, overflow comparison checks 1000000 (e6) but the
return value is 100000 (e5), fix this typo.

gcc/ChangeLog

2020-01-14  Kewen Lin  <linkw@gcc.gnu.org>

    * cfgloopanal.c (average_num_loop_insns): Free bbs when early
    return, fix typo on return value.

Another place that needs to specially handle Concepts TS function-style
concepts.

	* except.c (check_noexcept_r): Handle concept-check.

Here, we weren't recognizing that the template parameter of A is used by the
reference to d in the requires-clause of f.  Fixed by passing down the
active template parameters in the context of normalization, and adding to
the mapping any such parameters shared by a member template used in the
constraint-expression.

	* pt.c (struct find_template_parameter_info): Add ctx_parms.
	(any_template_parm_r): Handle TEMPLATE_DECL.
	(find_template_parameters): Take parms instead of their depth.
	* constraint.cc (build_parameter_mapping): Pass them.

v8:
 1. Rebase to master with Martin's static function (r280043) comments merge.
    Boostrap/testsuite/SPEC2017 tested pass on Power8-LE.
 2. TODO:
    2.1. C++ devirt for multiple speculative call targets.
    2.2. ipa-icf ipa_merge_profiles refine with COMDAT inline testcase.

This patch aims to fix PR69678 caused by PGO indirect call profiling
performance issues.
The bug that profiling data is never working was fixed by Martin's pull
back of topN patches, performance got GEOMEAN ~1% improvement(+24% for
511.povray_r specifically).
Still, currently the default profile only generates SINGLE indirect target
that called more than 75%.  This patch leverages MULTIPLE indirect
targets use in LTO-WPA and LTO-LTRANS stage, as a result, function
specialization, profiling, partial devirtualization, inlining and
cloning could be done successfully based on it.
Performance can get improved from 0.70 sec to 0.38 sec on simple tests.
Details are:
  1.  PGO with topn is enabled by default now, but only one indirect
  target edge will be generated in ipa-profile pass, so add variables to enable
  multiple speculative edges through passes, speculative_id will record the
  direct edge index bind to the indirect edge, indirect_call_targets length
  records how many direct edges owned by the indirect edge, postpone gimple_ic
  to ipa-profile like default as inline pass will decide whether it is benefit
  to transform indirect call.
  2.  Use speculative_id to track and search the reference node matched
  with the direct edge's callee for multiple targets.  Actually, it is the
  caller's responsibility to handle the direct edges mapped to same indirect
  edge.  speculative_call_info will return one of the direct edge specified,
  this will leverage current IPA edge process framework mostly.
  3.  Enable LTO WPA/LTRANS stage multiple indirect call targets analysis for
  profile full support in ipa passes and cgraph_edge functions.  speculative_id
  can be set by make_speculative id when multiple targets are binded to
  one indirect edge, and cloned if new edge is cloned.  speculative_id
  is streamed out and stream int by lto like lto_stmt_uid.
  4.  Create and duplicate all speculative direct edge's call summary
  in ipa-fnsummary.c with auto_vec.
  5.  Add 1 in module testcase and 2 cross module testcases.
  6.  Bootstrap and regression test passed on Power8-LE.  No function
  and performance regression for SPEC2017.

gcc/ChangeLog

	2020-01-14  Xiong Hu Luo  <luoxhu@linux.ibm.com>

	PR ipa/69678
	* cgraph.c (symbol_table::create_edge): Init speculative_id and
	target_prob.
	(cgraph_edge::make_speculative): Add param for setting speculative_id
	and target_prob.
	(cgraph_edge::speculative_call_info): Update comments and find reference
	by speculative_id for multiple indirect targets.
	(cgraph_edge::resolve_speculation): Decrease the speculations
	for indirect edge, drop it's speculative if not direct target
	left. Update comments.
	(cgraph_edge::redirect_call_stmt_to_callee): Likewise.
	(cgraph_node::dump): Print num_speculative_call_targets.
	(cgraph_node::verify_node): Don't report error if speculative
	edge not include statement.
	(cgraph_edge::num_speculative_call_targets_p): New function.
	* cgraph.h (int common_target_id): Remove.
	(int common_target_probability): Remove.
	(num_speculative_call_targets): New variable.
	(make_speculative): Add param for setting speculative_id.
	(cgraph_edge::num_speculative_call_targets_p): New declare.
	(target_prob): New variable.
	(speculative_id): New variable.
	* ipa-fnsummary.c (analyze_function_body): Create and duplicate
	  call summaries for multiple speculative call targets.
	* cgraphclones.c (cgraph_node::create_clone): Clone speculative_id.
	* ipa-profile.c (struct speculative_call_target): New struct.
	(class speculative_call_summary): New class.
	(class speculative_call_summaries): New class.
	(call_sums): New variable.
	(ipa_profile_generate_summary): Generate indirect multiple targets summaries.
	(ipa_profile_write_edge_summary): New function.
	(ipa_profile_write_summary): Stream out indirect multiple targets summaries.
	(ipa_profile_dump_all_summaries): New function.
	(ipa_profile_read_edge_summary): New function.
	(ipa_profile_read_summary_section): New function.
	(ipa_profile_read_summary): Stream in indirect multiple targets summaries.
	(ipa_profile): Generate num_speculative_call_targets from
	profile summaries.
	* ipa-ref.h (speculative_id): New variable.
	* ipa-utils.c (ipa_merge_profiles): Update with target_prob.
	* lto-cgraph.c (lto_output_edge): Remove indirect common_target_id and
	common_target_probability.   Stream out speculative_id and
	num_speculative_call_targets.
	(input_edge): Likewise.
	* predict.c (dump_prediction): Remove edges count assert to be
	precise.
	* symtab.c (symtab_node::create_reference): Init speculative_id.
	(symtab_node::clone_references): Clone speculative_id.
	(symtab_node::clone_referring): Clone speculative_id.
	(symtab_node::clone_reference): Clone speculative_id.
	(symtab_node::clear_stmts_in_references): Clear speculative_id.
	* tree-inline.c (copy_bb): Duplicate all the speculative edges
	if indirect call contains multiple speculative targets.
	* value-prof.h  (check_ic_target): Remove.
	* value-prof.c  (gimple_value_profile_transformations):
	Use void function gimple_ic_transform.
	* value-prof.c  (gimple_ic_transform): Handle topn case.
	Fix comment typos.  Change it to a void function.

gcc/testsuite/ChangeLog

	2020-01-14  Xiong Hu Luo  <luoxhu@linux.ibm.com>

	PR ipa/69678
	* gcc.dg/tree-prof/indir-call-prof-topn.c: New testcase.
	* gcc.dg/tree-prof/crossmodule-indir-call-topn-1.c: New testcase.
	* gcc.dg/tree-prof/crossmodule-indir-call-topn-1a.c: New testcase.
	* gcc.dg/tree-prof/crossmodule-indir-call-topn-2.c: New testcase.
	* lib/scandump.exp: Dump executable file name.
	* lib/scanwpaipa.exp: New scan-pgo-wap-ipa-dump.

This adds octeontx2 naming.  It currently uses the cortexa57
cost model and schedule model until I submit this.  This is
more a place holder to get the naming of the cores in GCC 10.
I will submit the cost model in the next couple of days.

ChangeLog:
* config/aarch64/aarch64-cores.def (octeontx2): New define.
(octeontx2t98): New define.
(octeontx2t96): New define.
(octeontx2t93): New define.
(octeontx2f95): New define.
(octeontx2f95n): New define.
(octeontx2f95mm): New define.
* config/aarch64/aarch64-tune.md: Regenerate.
* doc/invoke.texi (-mcpu=): Document the new cpu types.

This patch replaces the update_web_docs_libstdcxx_svn script, that
updates online documentation from its sources in the GCC repository, run
once a day from cron, with update_web_docs_libstdcxx_git.

	* update_web_docs_libstdcxx_git: New file.
	* update_web_docs_libstdcxx_svn: Remove.
	* crontab: Use update_web_docs_libstdcxx_git.

gcc/testsuite/ChangeLog:
	* gcc.dg/plugin/diagnostic-test-paths-2.c: Remove unused dg-line
	directive.

This reverts commit b60563a8.

Doesn't work as expected.

When we add a push rule, the default rule gets removed, so add that in
explicitly.  This needs to come last since otherwise it would match
the custom redirecting rules we have for personal and vendor
sub-spaces.

I also noticed that the push rule for the vendor subspace still had
a force push default.  We don't want that so remove it.

	* gcc-git-customization.sh: Add back the default rule that
	is lost by adding a custom push rule.
	* git-fetch-vendor.sh: Likewise, also remove '+' from push specs.

2020-01-13  Martin Jambor  <mjambor@suse.cz>

	PR ipa/93223
	* ipa-cp.c (devirtualization_time_bonus): Check whether isummary is
	NULL.

	testsuite/
	* g++.dg/ipa/pr93223.C: New test.

The library has already worked around this issue, but I was curious about
why it wasn't working.  The answer: because we were passing &var to fold,
which doesn't know about the constexpr values hash table.  Fixed by passing
&"str" instead.

	* constexpr.c (cxx_eval_builtin_function_call): Expose STRING_CST
	to str/mem builtins.

This is a pretty rare situation since the C++11 change to make all
destructors default to noexcept, but it is still possible to define throwing
destructors, and if a destructor for a local variable throws during the
return, we've already constructed the return value, so now we need to
destroy it.  I handled this somewhat like the new-expression cleanup; as in
that case, this cleanup can't properly nest with the cleanups for local
variables, so I introduce a cleanup region around the whole function and a
flag variable to indicate whether the return value actually needs to be
destroyed.

Setting the flag requires giving a COMPOUND_EXPR as the operand of a
RETURN_EXPR, so I adjust gimplify_return_expr to handle that.

This doesn't currently work with deduced return type because we don't know
the type when we're deciding whether to introduce the cleanup region.

gcc/
	* gimplify.c (gimplify_return_expr): Handle COMPOUND_EXPR.
gcc/cp/
	* cp-tree.h (current_retval_sentinel): New macro.
	* decl.c (start_preparsed_function): Set up cleanup for retval.
	* typeck.c (check_return_expr): Set current_retval_sentinel.

My earlier patch to reintroduce short_shift failed to adjust for the C++
front end use of const_op1 rather than op1.

	* typeck.c (cp_build_binary_op): Use folded op1 for short_shift.

This patch replaces the update_web_docs_svn script, that updates
online documentation from its sources in the GCC repository, run once
a day from cron, with update_web_docs_git.

	* update_web_docs_git: New file.
	* update_web_docs_svn: Remove.
	* crontab: Use update_web_docs_svn.

Bug 93241 reports a case where certain C expressions involving casts,
that would not be valid in an evaluated part of an integer constant
expression (because of e.g. involving integer overflow), are wrongly
rejected in an unevaluated part of an integer constant expression even
though all the operands and operations are ones that are valid in that
context.  This is a rejects-valid regression in GCC 4.5 and later
relative to 4.4 (for some testcases; the one in the bug uses
_Static_assert which isn't supported in those older releases).

The rule in the C front end is that an expression with those
properties (valid in an unevaluated part of an integer constant
expression but not an evaluated part) must be represented either as an
INTEGER_CST with TREE_OVERFLOW set or as a C_MAYBE_CONST_EXPR with
C_MAYBE_CONST_EXPR_INT_OPERANDS set.  This patch fixes build_c_cast to
check for that case and call note_integer_operands as needed.

Bootstrapped with no regressions for x86_64-pc-linux-gnu.

	PR c/93241
gcc/c:
	* c-typeck.c (build_c_cast): Check for expressions with integer
	operands that can occur in an unevaluated part of an integer
	constant expression and call note_integer_operands as needed.

gcc/testsuite:
	* gcc.dg/c11-static-assert-10.c, gcc.dg/c99-const-expr-15.c: New
	tests.

This simple script is intended to setup a new git configuration to
pull the branches and tags for a specific vendor.  This should
simplify some of the steps needed for working with a vendor's
branches.

	* git-fetch-vendor.sh: New file.

2020-01-13  Jakub Jelinek  <jakub@redhat.com>

	* contrib/gcc-git-customization.sh: Add git gcc-descr and gcc-undescr
	aliases.

This patch is intended to help with folks setting up a git work
environment for use with GCC following the transition to git.  It
currently does a couple of things.

1) Add an alias 'svn-rev' to git so that you can look up a legacy
commit by its svn revision number.  This enables you to type
	git svn-rev 1234
and git will show the commit log entry relating to SVN r1234.

2) Sets up tracking information for the user's personal area in
the git repo.  It tries to figure out some sensible answers to the
data it needs, but allows the user to override the values.  It then
creates the fetch and push entries that are needed for tracking the
extra refs. This implements one part of the recommendations that I've
proposed in svnwrite.html for dealing with private branches.

It should be possible to run the script more than once and for it to
DTRT.  If you change your answers the configuration should be
correctly updated.

2020-01-13  Richard Earnshaw  <rearnsha@arm.com>

    * gcc-git-customization: New file.

	* ipa-cp.c (get_max_overall_size): Use newly
	renamed param param_ipa_cp_unit_growth.
	* params.opt: Remove legacy param name.

gcc/testsuite/ChangeLog:

	PR tree-optimization/93213
	* gcc.c-torture/execute/pr93213.c: New test.

gcc/ChangeLog:

	PR tree-optimization/93213
	* tree-ssa-strlen.c (handle_store): Only allow single-byte nul-over-nul
	stores to be eliminated.

2020-01-13  Martin Liska  <mliska@suse.cz>

	* opts.c (print_help): Do not print CL_PARAM
	and CL_WARNING for CL_OPTIMIZATION.

	PR libstdc++/93244
	* include/bits/fs_path.h (path::generic_string<C,A>)
	[_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Convert root-dir to forward-slash.
	* testsuite/27_io/filesystem/path/generic/generic_string.cc: Check
	root-dir is converted to forward slash in generic pathname.
	* testsuite/27_io/filesystem/path/generic/utf.cc: New test.
	* testsuite/27_io/filesystem/path/generic/wchar_t.cc: New test.

This implements the new requirements for C++20 that std::atomic should
initialize the atomic variable in its default constructor.

This patch does not add the deprecated attribute to atomic_init, but
that should be done at some point as it's deprecated in C++20.

The paper also deprecates the ATOMIC_FLAG_INIT macro, although we can't
apply the deprecated attribute to a macro.

	PR libstdc++/58605
	* include/bits/atomic_base.h (__cpp_lib_atomic_value_initialization):
	Define.
	(__atomic_flag_base, __atomic_base, __atomic_base<_PTp*>)
	(__atomic_float): Add default member initializer for C++20.
	* include/std/atomic (atomic): Likewise.
	(atomic::atomic()): Remove noexcept-specifier on default constructor.
	* include/std/version (__cpp_lib_atomic_value_initialization): Define.
	* testsuite/29_atomics/atomic/cons/assign_neg.cc: Adjust dg-error line
	number.
	* testsuite/29_atomics/atomic/cons/copy_neg.cc: Likewise.
	* testsuite/29_atomics/atomic/cons/value_init.cc: New test.
	* testsuite/29_atomics/atomic_flag/cons/value_init.cc: New test.
	* testsuite/29_atomics/atomic_flag/requirements/trivial.cc: Adjust
	expected result for is_trivially_default_constructible.
	* testsuite/29_atomics/atomic_float/requirements.cc: Likewise.
	* testsuite/29_atomics/atomic_float/value_init.cc: New test.
	* testsuite/29_atomics/atomic_integral/cons/assign_neg.cc: Likewise.
	* testsuite/29_atomics/atomic_integral/cons/copy_neg.cc: Likewise.
	* testsuite/29_atomics/atomic_integral/cons/value_init.cc
	* testsuite/29_atomics/atomic_integral/requirements/trivial.cc: Adjust
	expected results for is_trivially_default_constructible.
	* testsuite/util/testsuite_common_types.h (has_trivial_dtor): Add
	new test generator.

	PR driver/92757
	* doc/invoke.texi (Warning Options): Add caveat about some warnings
	depending on optimization settings.

2020-01-13  Jakub Jelinek  <jakub@redhat.com>

	PR tree-optimization/90838
	* tree-ssa-forwprop.c (simplify_count_trailing_zeroes): Use
	SCALAR_INT_TYPE_MODE directly in CTZ_DEFINED_VALUE_AT_ZERO macro
	argument rather than to initialize temporary for targets that
	don't use the mode argument at all.  Initialize ctzval to avoid
	warning at -O0.

This patch updates the gcc_release script, used for snapshots and
releases, to use git instead of SVN.

The parts of the changes used in building snapshots have been tested.
The parts used for building releases have not, so it's likely further
fixes may turn out to be needed there when releases are first built
from git.

	* gcc_release: Use git instead of SVN.
	* crontab: Update gcc_release calls.