[Ada] Check entries for formals of mode IN appearing as global outputs

gcc/ada/

* sem_prag.adb (Check_Mode_Restriction_In_Enclosing_Context):
Extend check to protected entries.

[Ada] Fix reference to SPARK RM rule in comment

gcc/ada/

* sem_prag.adb (Check_Mode_Restriction_In_Enclosing_Context):
Fix reference to SPARK RM rule number.

[Ada] Preliminary cleanup in floating-point output implementation

gcc/ada/

* exp_intr.adb: Remove with/use clauses for Urealp.
(Expand_Is_Negative): Delete.
(Expand_Intrinsic_Call): Do not call it.
* rtsfind.ads (RE_Id): Remove RE_Float_Unsigned.
(RE_Unit_Table): Remove entry for RE_Float_Unsigned.
* snames.ads-tmpl (Name_Is_Negative): Delete.
* libgnat/s-imgrea.ads (Set_Image_Real): Fix mode of S parameter.
* libgnat/s-imgrea.adb: Add with/use clauses for System.Img_Util.
(LLU): New subtype.
(Maxdigs): Use it.
(Is_Negative): Reimplement.
(Image_Floating_Point): Simplify.
(Set_Image_Real): Fix mode of S parameter.  Remove the low-level
processing on characters.  Flip the sign of the Scale variable.
Compute the maximum number of digits for the straight notation.
Call Set_Decimal_Digits at the end to do the final formatting.
* libgnat/s-imguti.ads (Floating_Invalid_Value): New type.
(Set_Floating_Invalid_Value): New procedure.
* libgnat/s-imguti.adb (Set_Floating_Invalid_Value): Implement it
based on existing code from Set_Image_Real.
* libgnat/s-unstyp.ads (Float_Unsigned): Delete.

[Ada] Fix inconsistent handling of character set control switches

gcc/ada/

* csets.adb (Initialize): Refactor into CASE statement; raise
exception on unsupported code of character set (it will be
gently rejected earlier when scanning command line switches).
* switch-b.adb (Scan_Binder_Switches): Refactor into a
membership expression; add missing '9' choice; reorder as
described by GNAT UG, section 4.3.11.
* switch-c.adb (Scan_Front_End_Switches): Refactor into a
membership expression and reorder as above.
* doc/gnat_ugn/building_executable_programs_with_gnat.rst
(gnatic): Mention '5' as an allowed value for "c".
* gnat_ugn.texi: Regenerate.

[Ada] Guard against leading and trailing spaces reappearing in errors

gcc/ada/

* errout.adb (Error_Msg_Internal): Add assertion to prevent
style mistakes reappearing in the future.

[Ada] Wrong membership test computation for interface type

gcc/ada/

* exp_ch4.adb (Tagged_Membership): Remove wrong condition that
is not consistent with the documentation of this subprogram.

[Ada] Fix continuation message for missing ALL in access type

gcc/ada/

* sem_res.adb (Valid_Conversion): Make message a continuation.

[Ada] Address ??? comments in styleg.adb

gcc/ada/

* styleg.adb: Address ??? comments.

OpenMP/Fortran - fix pasto + testcase in depobj [PR100397]

gcc/fortran/ChangeLog:

PR testsuite/100397
* trans-openmp.c (gfc_trans_omp_depobj): Fix pasto in enum values.

libgomp/ChangeLog:

PR testsuite/100397
* testsuite/libgomp.fortran/depobj-1.f90 (dep2, dep3): Move var
declaration to scope of non-'depend'-guarded assignment to avoid races.

Fix typo in builtins.c.

gcc/ChangeLog:

2021-05-04  Prathamesh Kulkarni  <prathamesh.kulkarni@linaro.org>

* builtins.c (try_store_by_multiple_pieces): Fix constfun's prototype.

introduce try store by multiple pieces

The ldist pass turns even very short loops into memset calls.  E.g.,
the TFmode emulation calls end with a loop of up to 3 iterations, to
zero out trailing words, and the loop distribution pass turns them
into calls of the memset builtin.

Though short constant-length clearing memsets are usually dealt with
efficiently, for non-constant-length ones, the options are setmemM, or
a function calls.

RISC-V doesn't have any setmemM pattern, so the loops above end up
"optimized" into memset calls, incurring not only the overhead of an
explicit call, but also discarding the information the compiler has
about the alignment of the destination, and that the length is a
multiple of the word alignment.

This patch handles variable lengths with multiple conditional
power-of-2-constant-sized stores-by-pieces, so as to reduce the
overhead of length compares.

It also changes the last copy-prop pass into ccp, so that pointer
alignment and length's nonzero bits are detected and made available
for the expander, even for ldist-introduced SSA_NAMEs.

for  gcc/ChangeLog

* builtins.c (try_store_by_multiple_pieces): New.
(expand_builtin_memset_args): Use it.  If target_char_cast
fails, proceed as for non-constant val.  Pass len's ctz to...
* expr.c (clear_storage_hints): ... this.  Try store by
multiple pieces after setmem.
(clear_storage): Adjust.
* expr.h (clear_storage_hints): Likewise.
(try_store_by_multiple_pieces): Declare.
* passes.def: Replace the last copy_prop with ccp.

Daily bump.

[openmp, simt] Disable SIMT for user-defined reduction

The test-case included in this patch contains this target region:
...
  for (int i0 = 0 ; i0 < N0 ; i0++ )
    counter_N0.i += 1;
...

When running with nvptx accelerator, the counter variable is expected to
be N0 after the region, but instead is N0 / 32.  The problem is that rather
than getting the result for all warp lanes, we get it for just one lane.

This is caused by the implementation of SIMT being incomplete.  It handles
regular reductions, but appearantly not user-defined reductions.

For now, handle this by disabling SIMT in this case, specifically by setting
sctx->max_vf to 1.

Tested libgomp on x86_64-linux with nvptx accelerator.

gcc/ChangeLog:

2021-05-03  Tom de Vries  <tdevries@suse.de>

PR target/100321
* omp-low.c (lower_rec_input_clauses): Disable SIMT for user-defined
reduction.

libgomp/ChangeLog:

2021-05-03  Tom de Vries  <tdevries@suse.de>

PR target/100321
* testsuite/libgomp.c/target-44.c: New test.

testsuite: Fix dg directives order in arm/aarch64 vml[as]_float_not_fused.c

dg-do must come before dg-skip-if, this patch fixes this oversight in
these two tests.

2021-05-03  Christophe Lyon  <christophe.lyon@linaro.org>

gcc/testsuite/
* gcc.target/aarch64/advsimd-intrinsics/vmla_float_not_fused.c:
Fix dg directives order.
* gcc.target/aarch64/advsimd-intrinsics/vmls_float_not_fused.c:
Likewise.

Fix expected output for nds32le and m32r

gcc/testsuite
* gcc.dg/tree-ssa/ssa-dse-26.c: Fix expected output for nds32le
and m32r.

c++: base-clause parsing and implicit 'this' [PR100362]

My r11-6815 change to defer access checking when processing a
base-clause removed a pair of pushclass / popclass calls that seemed to
be unnecessary now that we'd also defer access checking while parsing
the base-clause.

But it turns out these calls make a difference in the below testcase,
where we have a local class whose base-clause implicitly uses the 'this'
of the enclosing class.  Before r11-6815, while parsing the base-clause
of the local class, maybe_resolve_dummy would fail to resolve the dummy
'this' object because the current scope would be the local class.  Now,
since the current scope is the lambda, maybe_resolve_dummy succeeds and
returns the 'this' for the enclosing class Qux.  Later, during deferred
instantiation of the local class, we get confused trying to resolve the
access of 'a_' through this non-dummy 'this'.

So this patch just reinstates the calls to pushclass / popclass that
were removed in r11-6815.

gcc/cp/ChangeLog:

PR c++/100362
* parser.c (cp_parser_class_head): Reinstate calls to pushclass
and popclass when parsing the base-clause that were removed in
r11-6815.

gcc/testsuite/ChangeLog:

PR c++/100362
* g++.dg/cpp1y/lambda-generic-100362.C: New test.

c++: mark_used and ADL with template-id [PR100344]

My r11-295 patch for PR68942 didn't consider that the callee of an
ADL-eligible function call can be a TEMPLATE_ID_EXPR, and we don't want
to disable mark_used when substituting into the template arguments of
this TEMPLATE_ID_EXPR because the arguments are clearly used regardless
of the outcome of ADL.  In the first testcase below, this oversight
causes us to trip over the assert in build_call_a for the call to
find_index<int> because the function no longer had its TREE_USED bit set
from mark_used.

So this patch restricts the original fix to disable mark_used only when
the callee is a FUNCTION_DECL, which seems to be the only case that
matters for PR68942.  For instance, in the second testcase below we
already don't mark_used the deleted function specialization even before
r11-295.

gcc/cp/ChangeLog:

PR c++/68942
PR c++/100344
* pt.c (tsubst_copy_and_build) <case CALL_EXPR>: Set tf_conv
only when the callee is a FUNCTION_DECL.

gcc/testsuite/ChangeLog:

PR c++/68942
PR c++/100344
* g++.dg/template/call8.C: New test.
* g++.dg/template/koenig12a.C: New test.

Fix expected output for lm32 and bfin

gcc/testsuite
* gcc.dg/tree-ssa/ssa-dse-26.c: Fix expected output for bfin and lm32.

c++: Fix ICE with invalid requires-expression [PR100055]

This fixes a crash on invalid requires-expression: in this test,
current_template_parms is null so accessing TEMPLATE_PARMS_CONSTRAINTS
is going to fail.  So don't crash, but make sure we've complained
already.

gcc/cp/ChangeLog:

PR c++/100055
* decl.c (grokfndecl): Check current_template_parms.

gcc/testsuite/ChangeLog:

PR c++/100055
* g++.dg/concepts/diagnostic18.C: New test.

c++: Remove GCC12 FIXME for DR1312

This patch removes a FIXME I left for myself for GCC 12, along with
adjusting the relevant test.

gcc/cp/ChangeLog:

DR 1312
* constexpr.c (cxx_eval_constant_expression): Don't check
integer_zerop.

gcc/testsuite/ChangeLog:

DR 1312
* g++.dg/cpp0x/constexpr-cast2.C: Remove XFAILs.

Fix xstormy16 selector

gcc/testsuite
* gcc.dg/tree-ssa/ssa-dse-26.c: Fix xstormy selector.

Fix test results on rx

gcc/testsuite
* gcc.dg/tree-ssa/ssa-dse-26.c: Update expected output for rx too.

Fix test results on or1k

gcc/testsuite
* gcc.dg/tree-ssa/ssa-dse-26.c: Update expected output for or1k too.

Fix test results on cr16 and xstormy16

gcc/testsuite
* gcc.dg/tree-ssa/ssa-dse-26.c: Update expected output for
cr16 and xstormy16 targets.

Improve PHI handling in DSE

This improves handling of PHI defs when walking uses in
dse_classify_store to track two PHI defs.  This happens
when there are CFG merges and one PHI feeds into another.
If we decide to want more then using a sbitmap for this might be
the way to go.

2021-05-03  Richard Biener  <rguenther@suse.de>

* tree-ssa-dse.c (dse_classify_store): Track two PHI defs.

* gcc.dg/tree-ssa/ssa-dse-42.c: New testcase.
* gcc.dg/pr81192.c: Disable DSE.

Perform reverse program order walk for GIMPLE DSE

The following changes the post-dominator domwalk done by GIMPLE DSE
to a reverse program order walk.  This enables 2% more stmts do be
DSEd during bootstrap and in particular for testcases like the one
added where it is important to visit post dominators in a particular
order.

2021-05-03  Richard Biener  <rguenther@suse.de>

* tree-ssa-dse.c: Do not include domwalk.h but cfganal.h.
(dse_dom_walker): Remove.
(dse_dom_walker::dse_optimize_stmt): Rename...
(dse_optimize_stmt): ... to this, pass in live_bytes sbitmap.
(dse_dom_walker::before_dom_children): Inline ...
(pass_dse::execute): ... here.  Perform a reverse program
order walk.

* gcc.dg/tree-ssa/ssa-dse-41.c: New testcase.

GCC_CET_HOST_FLAGS: Check if host supports multi-byte NOPs

Check if host supports multi-byte NOPs before enabling CET on host.

gcc/

PR bootstrap/99703
* configure: Regenerated.

libbacktrace/

PR bootstrap/99703
* configure: Regenerated.

libcc1/

PR bootstrap/99703
* configure: Regenerated.

libcpp/

PR bootstrap/99703
* configure: Regenerated.

libdecnumber/

PR bootstrap/99703
* configure: Regenerated.

lto-plugin/

PR bootstrap/99703
* configure: Regenerated.

GCC_CET_HOST_FLAGS: Check if host supports multi-byte NOPs

Sync with binutils for PR binutils/27397.  Check if host supports
multi-byte NOPs before enabling CET on host.

config/

PR bootstrap/99703
* cet.m4 (GCC_CET_HOST_FLAGS): Check if host supports multi-byte
NOPs.

libiberty/

PR bootstrap/99703
* configure: Regenerated.

IBM Z: Handle hard registers in s390_md_asm_adjust()

gen_fprx2_to_tf() and gen_tf_to_fprx2() cannot handle hard registers,
since the subregs they create do not pass validation.  Change
s390_md_asm_adjust() to manually copy between hard VRs and FPRs instead
of using these two functions.

gcc/ChangeLog:

PR target/100217
* config/s390/s390.c (s390_hard_fp_reg_p): New function.
(s390_md_asm_adjust): Handle hard registers.

gcc/testsuite/ChangeLog:

PR target/100217
* gcc.target/s390/vector/long-double-asm-in-out-hard-fp-reg.c: New test.
* gcc.target/s390/vector/long-double-asm-inout-hard-fp-reg.c: New test.

tree-ssa-dse: Fix up go.test/test/fixedbugs/issue16095.go miscompilation [PR100382]

The new DCE code inside of tree DSE removes in -fnon-call-exceptions
go code a load from NULL pointer the testcase relies on throwing an
exception and so the test hangs.

The following patch just repeats a check that e.g. tree-ssa-dce.c
uses to prevent this.

2021-05-03  Jakub Jelinek  <jakub@redhat.com>

PR tree-optimization/100382
* tree-ssa-dse.c: Include tree-eh.h.
(dse_dom_walker::before_dom_children): Don't remove stmts if
stmt_unremovable_because_of_non_call_eh_p is true.

[Ada] Ada.Strings.Unbounded.Aux.Set_String

gcc/ada/

* libgnat/a-stunau.ads, libgnat/a-stunau.adb,
libgnat/a-stunau__shared.adb (Set_String): Remove old version,
replace by a new version taking a callback to set the string.

[Ada] Missing Preelaborate_Initialization on Ada.Containers.Ordered_Maps.Map

gcc/ada/

* libgnat/a-coorma.ads (Map): Add missing
Preelaborate_Initialization.

[Ada] Reuse Is_Universal_Numeric_Type where possible

gcc/ada/

* exp_ch4.adb (Analyze_Number_Declaration, Expand_N_Op_Expon):
Simplify with Is_Universal_Numeric_Type.
* sem_attr.adb (Resolve_Attribute): Likewise.
* sem_ch3.adb: Likewise.
* sem_ch4.adb (Check_Common_Type, Check_Arithmetic_Pair):
Likewise.
* sem_eval.adb (Eval_Unary_Op, Test_In_Range): Likewise.
* sem_res.adb (Resolve_Arithmetic_Op, Resolve_Membership_Op,
Resolve_Op_Expon, Resolve_Unary_Op, Set_Mixed_Mode_Operand,
Set_Operand_Type): Likewise.
* sem_type.adb (Disambiguate, Find_Unique_Type): Likewise.
* sem_util.adb (Universal_Interpretation): Likewise.

[Ada] Minor style fixes in Max_Aggregate_Size

gcc/ada/

* exp_aggr.adb (Max_Aggregate_Size): Add header boxes for nested
routines; move a local constant after nested subprogram bodies;
refill comment.

[Ada] Reuse a wrapper for Resolve with implicit type where possible

gcc/ada/

* sem_attr.adb (Analyze_Attribute): Reuse Resolve with implicit
type when analysing attribute Priority.
* sem_ch5.adb (Analyze_Case_Statement): Likewise for a rare case
in analysis of case statements.
(Analyze_Iterator_Specification): Likewise for non-overloaded
domain of iteration.

[Ada] Replace low-level membership test with a high-level Is_Record_Type

gcc/ada/

* einfo.adb (Write_Entity_Info): Simplify an Ekind membership
test.
* exp_aggr.adb (Is_CCG_Supported_Aggregate): Likewise.

[Ada] Refine type of a counter object from Int to Nat

gcc/ada/

* exp_ch7.adb (Build_Finalize_Statements): Refine type of a
local counter variable.
* exp_dist.adb (Append_Record_Traversal): Refine type of Counter
parameter.
(Add_Process_Element): Likewise.
(Build_From_Any_Call): Refine type of a local counter variable.
(Build_From_Any_Function): Likewise.
(Build_To_Any_Function): Likewise.
(FA_Rec_Add_Process_Element): Likewise.
(TA_Append_Record_Traversal): Likewise.
(TA_Rec_Add_Process_Element): Likewise.

[Ada] Simplify implicit loading for GNATprove with Discard_Node

gcc/ada/

* rtsfind.adb (SPARK_Implicit_Load): Simplify with Discard_Node.

[Ada] Update copyright notice

gcc/ada/

* Makefile.rtl: Update copyright notice.
* ada_get_targ.adb: Likewise.
* adabkend.adb: Likewise.
* adabkend.ads: Likewise.
* adadecode.c: Likewise.
* adadecode.h: Likewise.
* adaint.c: Likewise.
* adaint.h: Likewise.
* affinity.c: Likewise.
* ali-util.adb: Likewise.
* ali-util.ads: Likewise.
* ali.adb: Likewise.
* ali.ads: Likewise.
* alloc.ads: Likewise.
* argv-lynxos178-raven-cert.c: Likewise.
* argv.c: Likewise.
* aspects.adb: Likewise.
* aspects.ads: Likewise.
* atree.adb: Likewise.
* atree.ads: Likewise.
* atree.h: Likewise.
* aux-io.c: Likewise.
* back_end.adb: Likewise.
* back_end.ads: Likewise.
* bcheck.adb: Likewise.
* bcheck.ads: Likewise.
* binde.adb: Likewise.
* binde.ads: Likewise.
* binderr.adb: Likewise.
* binderr.ads: Likewise.
* bindgen.adb: Likewise.
* bindgen.ads: Likewise.
* bindo-augmentors.adb: Likewise.
* bindo-augmentors.ads: Likewise.
* bindo-builders.adb: Likewise.
* bindo-builders.ads: Likewise.
* bindo-diagnostics.adb: Likewise.
* bindo-diagnostics.ads: Likewise.
* bindo-elaborators.adb: Likewise.
* bindo-elaborators.ads: Likewise.
* bindo-graphs.adb: Likewise.
* bindo-graphs.ads: Likewise.
* bindo-units.adb: Likewise.
* bindo-units.ads: Likewise.
* bindo-validators.adb: Likewise.
* bindo-validators.ads: Likewise.
* bindo-writers.adb: Likewise.
* bindo-writers.ads: Likewise.
* bindo.adb: Likewise.
* bindo.ads: Likewise.
* bindusg.adb: Likewise.
* bindusg.ads: Likewise.
* butil.adb: Likewise.
* butil.ads: Likewise.
* cal.c: Likewise.
* casing.adb: Likewise.
* casing.ads: Likewise.
* ceinfo.adb: Likewise.
* checks.adb: Likewise.
* checks.ads: Likewise.
* cio.c: Likewise.
* clean.adb: Likewise.
* clean.ads: Likewise.
* comperr.adb: Likewise.
* comperr.ads: Likewise.
* contracts.adb: Likewise.
* contracts.ads: Likewise.
* csets.adb: Likewise.
* csets.ads: Likewise.
* csinfo.adb: Likewise.
* cstand.adb: Likewise.
* cstand.ads: Likewise.
* cstreams.c: Likewise.
* ctrl_c.c: Likewise.
* debug.adb: Likewise.
* debug.ads: Likewise.
* debug_a.adb: Likewise.
* debug_a.ads: Likewise.
* einfo.adb: Likewise.
* einfo.ads: Likewise.
* elists.adb: Likewise.
* elists.ads: Likewise.
* elists.h: Likewise.
* env.c: Likewise.
* env.h: Likewise.
* err_vars.ads: Likewise.
* errno.c: Likewise.
* errout.adb: Likewise.
* errout.ads: Likewise.
* erroutc.adb: Likewise.
* erroutc.ads: Likewise.
* errutil.adb: Likewise.
* errutil.ads: Likewise.
* eval_fat.adb: Likewise.
* eval_fat.ads: Likewise.
* exit.c: Likewise.
* exp_aggr.adb: Likewise.
* exp_aggr.ads: Likewise.
* exp_atag.adb: Likewise.
* exp_atag.ads: Likewise.
* exp_attr.adb: Likewise.
* exp_attr.ads: Likewise.
* exp_cg.adb: Likewise.
* exp_cg.ads: Likewise.
* exp_ch10.ads: Likewise.
* exp_ch11.adb: Likewise.
* exp_ch11.ads: Likewise.
* exp_ch12.adb: Likewise.
* exp_ch12.ads: Likewise.
* exp_ch13.adb: Likewise.
* exp_ch13.ads: Likewise.
* exp_ch2.adb: Likewise.
* exp_ch2.ads: Likewise.
* exp_ch3.adb: Likewise.
* exp_ch3.ads: Likewise.
* exp_ch4.adb: Likewise.
* exp_ch4.ads: Likewise.
* exp_ch5.adb: Likewise.
* exp_ch5.ads: Likewise.
* exp_ch6.adb: Likewise.
* exp_ch6.ads: Likewise.
* exp_ch7.adb: Likewise.
* exp_ch7.ads: Likewise.
* exp_ch8.adb: Likewise.
* exp_ch8.ads: Likewise.
* exp_ch9.adb: Likewise.
* exp_ch9.ads: Likewise.
* exp_code.adb: Likewise.
* exp_code.ads: Likewise.
* exp_dbug.adb: Likewise.
* exp_dbug.ads: Likewise.
* exp_disp.adb: Likewise.
* exp_disp.ads: Likewise.
* exp_dist.adb: Likewise.
* exp_dist.ads: Likewise.
* exp_fixd.adb: Likewise.
* exp_fixd.ads: Likewise.
* exp_imgv.adb: Likewise.
* exp_imgv.ads: Likewise.
* exp_intr.adb: Likewise.
* exp_intr.ads: Likewise.
* exp_pakd.adb: Likewise.
* exp_pakd.ads: Likewise.
* exp_prag.adb: Likewise.
* exp_prag.ads: Likewise.
* exp_put_image.adb: Likewise.
* exp_put_image.ads: Likewise.
* exp_sel.adb: Likewise.
* exp_sel.ads: Likewise.
* exp_smem.adb: Likewise.
* exp_smem.ads: Likewise.
* exp_spark.adb: Likewise.
* exp_spark.ads: Likewise.
* exp_strm.adb: Likewise.
* exp_strm.ads: Likewise.
* exp_tss.adb: Likewise.
* exp_tss.ads: Likewise.
* exp_unst.adb: Likewise.
* exp_unst.ads: Likewise.
* exp_util.adb: Likewise.
* exp_util.ads: Likewise.
* expander.adb: Likewise.
* expander.ads: Likewise.
* expect.c: Likewise.
* fe.h: Likewise.
* final.c: Likewise.
* fmap.adb: Likewise.
* fmap.ads: Likewise.
* fname-sf.adb: Likewise.
* fname-sf.ads: Likewise.
* fname-uf.adb: Likewise.
* fname-uf.ads: Likewise.
* fname.adb: Likewise.
* fname.ads: Likewise.
* freeze.adb: Likewise.
* freeze.ads: Likewise.
* frontend.adb: Likewise.
* frontend.ads: Likewise.
* gcc-interface/ada-tree.h: Likewise.
* gcc-interface/ada.h: Likewise.
* gcc-interface/cuintp.c: Likewise.
* gcc-interface/decl.c: Likewise.
* gcc-interface/gadaint.h: Likewise.
* gcc-interface/gigi.h: Likewise.
* gcc-interface/lang-specs.h: Likewise.
* gcc-interface/misc.c: Likewise.
* gcc-interface/system.ads: Likewise.
* gcc-interface/targtyps.c: Likewise.
* gcc-interface/trans.c: Likewise.
* gcc-interface/utils.c: Likewise.
* gcc-interface/utils2.c: Likewise.
* get_scos.adb: Likewise.
* get_scos.ads: Likewise.
* get_targ.adb: Likewise.
* get_targ.ads: Likewise.
* ghost.adb: Likewise.
* ghost.ads: Likewise.
* gnat1drv.adb: Likewise.
* gnat1drv.ads: Likewise.
* gnat_cuda.adb: Likewise.
* gnat_cuda.ads: Likewise.
* gnatbind.adb: Likewise.
* gnatbind.ads: Likewise.
* gnatchop.adb: Likewise.
* gnatclean.adb: Likewise.
* gnatcmd.adb: Likewise.
* gnatcmd.ads: Likewise.
* gnatdll.adb: Likewise.
* gnatfind.adb: Likewise.
* gnatkr.adb: Likewise.
* gnatkr.ads: Likewise.
* gnatlink.adb: Likewise.
* gnatlink.ads: Likewise.
* gnatls.adb: Likewise.
* gnatls.ads: Likewise.
* gnatmake.adb: Likewise.
* gnatmake.ads: Likewise.
* gnatname.adb: Likewise.
* gnatname.ads: Likewise.
* gnatprep.adb: Likewise.
* gnatprep.ads: Likewise.
* gnatvsn.adb: Likewise.
* gnatvsn.ads: Likewise.
* gnatxref.adb: Likewise.
* gprep.adb: Likewise.
* gprep.ads: Likewise.
* gsocket.h: Likewise.
* hostparm.ads: Likewise.
* impunit.adb: Likewise.
* impunit.ads: Likewise.
* indepsw-aix.adb: Likewise.
* indepsw-darwin.adb: Likewise.
* indepsw-gnu.adb: Likewise.
* indepsw.adb: Likewise.
* indepsw.ads: Likewise.
* init.c: Likewise.
* initialize.c: Likewise.
* inline.adb: Likewise.
* inline.ads: Likewise.
* itypes.adb: Likewise.
* itypes.ads: Likewise.
* krunch.adb: Likewise.
* krunch.ads: Likewise.
* layout.adb: Likewise.
* layout.ads: Likewise.
* lib-list.adb: Likewise.
* lib-load.adb: Likewise.
* lib-load.ads: Likewise.
* lib-sort.adb: Likewise.
* lib-util.adb: Likewise.
* lib-util.ads: Likewise.
* lib-writ.adb: Likewise.
* lib-writ.ads: Likewise.
* lib-xref-spark_specific.adb: Likewise.
* lib-xref.adb: Likewise.
* lib-xref.ads: Likewise.
* lib.adb: Likewise.
* lib.ads: Likewise.
* libgnarl/a-astaco.adb: Likewise.
* libgnarl/a-dispat.adb: Likewise.
* libgnarl/a-dynpri.adb: Likewise.
* libgnarl/a-etgrbu.ads: Likewise.
* libgnarl/a-exetim__darwin.adb: Likewise.
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* libgnarl/a-exetim__mingw.ads: Likewise.
* libgnarl/a-exetim__posix.adb: Likewise.
* libgnarl/a-interr.adb: Likewise.
* libgnarl/a-interr.ads: Likewise.
* libgnarl/a-intnam.ads: Likewise.
* libgnarl/a-intnam__aix.ads: Likewise.
* libgnarl/a-intnam__darwin.ads: Likewise.
* libgnarl/a-intnam__dragonfly.ads: Likewise.
* libgnarl/a-intnam__dummy.ads: Likewise.
* libgnarl/a-intnam__freebsd.ads: Likewise.
* libgnarl/a-intnam__hpux.ads: Likewise.
* libgnarl/a-intnam__linux.ads: Likewise.
* libgnarl/a-intnam__lynxos.ads: Likewise.
* libgnarl/a-intnam__mingw.ads: Likewise.
* libgnarl/a-intnam__qnx.ads: Likewise.
* libgnarl/a-intnam__rtems.ads: Likewise.
* libgnarl/a-intnam__solaris.ads: Likewise.
* libgnarl/a-intnam__vxworks.ads: Likewise.
* libgnarl/a-reatim.adb: Likewise.
* libgnarl/a-reatim.ads: Likewise.
* libgnarl/a-retide.adb: Likewise.
* libgnarl/a-retide.ads: Likewise.
* libgnarl/a-rttiev.adb: Likewise.
* libgnarl/a-rttiev.ads: Likewise.
* libgnarl/a-synbar.adb: Likewise.
* libgnarl/a-synbar.ads: Likewise.
* libgnarl/a-synbar__posix.adb: Likewise.
* libgnarl/a-synbar__posix.ads: Likewise.
* libgnarl/a-sytaco.adb: Likewise.
* libgnarl/a-sytaco.ads: Likewise.
* libgnarl/a-tasatt.adb: Likewise.
* libgnarl/a-tasatt.ads: Likewise.
* libgnarl/a-taside.adb: Likewise.
* libgnarl/a-taside.ads: Likewise.
* libgnarl/a-tasini.adb: Likewise.
* libgnarl/a-tasini.ads: Likewise.
* libgnarl/a-taster.adb: Likewise.
* libgnarl/g-boubuf.adb: Likewise.
* libgnarl/g-boubuf.ads: Likewise.
* libgnarl/g-boumai.ads: Likewise.
* libgnarl/g-semaph.adb: Likewise.
* libgnarl/g-semaph.ads: Likewise.
* libgnarl/g-signal.adb: Likewise.
* libgnarl/g-signal.ads: Likewise.
* libgnarl/g-tastus.ads: Likewise.
* libgnarl/g-thread.adb: Likewise.
* libgnarl/g-thread.ads: Likewise.
* libgnarl/i-vxinco.adb: Likewise.
* libgnarl/i-vxinco.ads: Likewise.
* libgnarl/s-inmaop.ads: Likewise.
* libgnarl/s-inmaop__dummy.adb: Likewise.
* libgnarl/s-inmaop__posix.adb: Likewise.
* libgnarl/s-inmaop__vxworks.adb: Likewise.
* libgnarl/s-interr.adb: Likewise.
* libgnarl/s-interr.ads: Likewise.
* libgnarl/s-interr__dummy.adb: Likewise.
* libgnarl/s-interr__hwint.adb: Likewise.
* libgnarl/s-interr__sigaction.adb: Likewise.
* libgnarl/s-interr__vxworks.adb: Likewise.
* libgnarl/s-intman.ads: Likewise.
* libgnarl/s-intman__android.adb: Likewise.
* libgnarl/s-intman__dummy.adb: Likewise.
* libgnarl/s-intman__lynxos.adb: Likewise.
* libgnarl/s-intman__mingw.adb: Likewise.
* libgnarl/s-intman__posix.adb: Likewise.
* libgnarl/s-intman__qnx.adb: Likewise.
* libgnarl/s-intman__solaris.adb: Likewise.
* libgnarl/s-intman__susv3.adb: Likewise.
* libgnarl/s-intman__vxworks.adb: Likewise.
* libgnarl/s-intman__vxworks.ads: Likewise.
* libgnarl/s-linux.ads: Likewise.
* libgnarl/s-linux__alpha.ads: Likewise.
* libgnarl/s-linux__android.ads: Likewise.
* libgnarl/s-linux__hppa.ads: Likewise.
* libgnarl/s-linux__mips.ads: Likewise.
* libgnarl/s-linux__riscv.ads: Likewise.
* libgnarl/s-linux__sparc.ads: Likewise.
* libgnarl/s-linux__x32.ads: Likewise.
* libgnarl/s-mudido.adb: Likewise.
* libgnarl/s-mudido__affinity.adb: Likewise.
* libgnarl/s-osinte__aix.adb: Likewise.
* libgnarl/s-osinte__aix.ads: Likewise.
* libgnarl/s-osinte__android.adb: Likewise.
* libgnarl/s-osinte__android.ads: Likewise.
* libgnarl/s-osinte__darwin.adb: Likewise.
* libgnarl/s-osinte__darwin.ads: Likewise.
* libgnarl/s-osinte__dragonfly.adb: Likewise.
* libgnarl/s-osinte__dragonfly.ads: Likewise.
* libgnarl/s-osinte__dummy.ads: Likewise.
* libgnarl/s-osinte__freebsd.adb: Likewise.
* libgnarl/s-osinte__freebsd.ads: Likewise.
* libgnarl/s-osinte__gnu.adb: Likewise.
* libgnarl/s-osinte__gnu.ads: Likewise.
* libgnarl/s-osinte__hpux-dce.adb: Likewise.
* libgnarl/s-osinte__hpux-dce.ads: Likewise.
* libgnarl/s-osinte__hpux.ads: Likewise.
* libgnarl/s-osinte__kfreebsd-gnu.ads: Likewise.
* libgnarl/s-osinte__linux.ads: Likewise.
* libgnarl/s-osinte__lynxos178.adb: Likewise.
* libgnarl/s-osinte__lynxos178e.ads: Likewise.
* libgnarl/s-osinte__mingw.ads: Likewise.
* libgnarl/s-osinte__posix.adb: Likewise.
* libgnarl/s-osinte__qnx.adb: Likewise.
* libgnarl/s-osinte__qnx.ads: Likewise.
* libgnarl/s-osinte__rtems.adb: Likewise.
* libgnarl/s-osinte__rtems.ads: Likewise.
* libgnarl/s-osinte__solaris.adb: Likewise.
* libgnarl/s-osinte__solaris.ads: Likewise.
* libgnarl/s-osinte__vxworks.adb: Likewise.
* libgnarl/s-osinte__vxworks.ads: Likewise.
* libgnarl/s-osinte__x32.adb: Likewise.
* libgnarl/s-proinf.adb: Likewise.
* libgnarl/s-proinf.ads: Likewise.
* libgnarl/s-qnx.ads: Likewise.
* libgnarl/s-solita.adb: Likewise.
* libgnarl/s-solita.ads: Likewise.
* libgnarl/s-stusta.adb: Likewise.
* libgnarl/s-stusta.ads: Likewise.
* libgnarl/s-taasde.adb: Likewise.
* libgnarl/s-taasde.ads: Likewise.
* libgnarl/s-tadeca.adb: Likewise.
* libgnarl/s-tadeca.ads: Likewise.
* libgnarl/s-tadert.adb: Likewise.
* libgnarl/s-tadert.ads: Likewise.
* libgnarl/s-taenca.adb: Likewise.
* libgnarl/s-taenca.ads: Likewise.
* libgnarl/s-taprob.adb: Likewise.
* libgnarl/s-taprob.ads: Likewise.
* libgnarl/s-taprop.ads: Likewise.
* libgnarl/s-taprop__dummy.adb: Likewise.
* libgnarl/s-taprop__hpux-dce.adb: Likewise.
* libgnarl/s-taprop__linux.adb: Likewise.
* libgnarl/s-taprop__mingw.adb: Likewise.
* libgnarl/s-taprop__posix.adb: Likewise.
* libgnarl/s-taprop__qnx.adb: Likewise.
* libgnarl/s-taprop__solaris.adb: Likewise.
* libgnarl/s-taprop__vxworks.adb: Likewise.
* libgnarl/s-tarest.adb: Likewise.
* libgnarl/s-tarest.ads: Likewise.
* libgnarl/s-tasdeb.adb: Likewise.
* libgnarl/s-tasdeb.ads: Likewise.
* libgnarl/s-tasinf.adb: Likewise.
* libgnarl/s-tasinf.ads: Likewise.
* libgnarl/s-tasinf__linux.adb: Likewise.
* libgnarl/s-tasinf__linux.ads: Likewise.
* libgnarl/s-tasinf__mingw.adb: Likewise.
* libgnarl/s-tasinf__mingw.ads: Likewise.
* libgnarl/s-tasinf__solaris.adb: Likewise.
* libgnarl/s-tasinf__solaris.ads: Likewise.
* libgnarl/s-tasinf__vxworks.ads: Likewise.
* libgnarl/s-tasini.adb: Likewise.
* libgnarl/s-tasini.ads: Likewise.
* libgnarl/s-taskin.adb: Likewise.
* libgnarl/s-taskin.ads: Likewise.
* libgnarl/s-taspri__dummy.ads: Likewise.
* libgnarl/s-taspri__hpux-dce.ads: Likewise.
* libgnarl/s-taspri__lynxos.ads: Likewise.
* libgnarl/s-taspri__mingw.ads: Likewise.
* libgnarl/s-taspri__posix-noaltstack.ads: Likewise.
* libgnarl/s-taspri__posix.ads: Likewise.
* libgnarl/s-taspri__solaris.ads: Likewise.
* libgnarl/s-taspri__vxworks.ads: Likewise.
* libgnarl/s-tasque.adb: Likewise.
* libgnarl/s-tasque.ads: Likewise.
* libgnarl/s-tasren.adb: Likewise.
* libgnarl/s-tasren.ads: Likewise.
* libgnarl/s-tasres.ads: Likewise.
* libgnarl/s-tassta.adb: Likewise.
* libgnarl/s-tassta.ads: Likewise.
* libgnarl/s-tasuti.adb: Likewise.
* libgnarl/s-tasuti.ads: Likewise.
* libgnarl/s-tataat.adb: Likewise.
* libgnarl/s-tataat.ads: Likewise.
* libgnarl/s-tpinop.adb: Likewise.
* libgnarl/s-tpinop.ads: Likewise.
* libgnarl/s-tpoaal.adb: Likewise.
* libgnarl/s-tpoben.adb: Likewise.
* libgnarl/s-tpoben.ads: Likewise.
* libgnarl/s-tpobmu.adb: Likewise.
* libgnarl/s-tpobmu.ads: Likewise.
* libgnarl/s-tpobop.adb: Likewise.
* libgnarl/s-tpobop.ads: Likewise.
* libgnarl/s-tpopmo.adb: Likewise.
* libgnarl/s-tpopsp__posix-foreign.adb: Likewise.
* libgnarl/s-tpopsp__posix.adb: Likewise.
* libgnarl/s-tpopsp__solaris.adb: Likewise.
* libgnarl/s-tpopsp__tls.adb: Likewise.
* libgnarl/s-tpopsp__vxworks-rtp.adb: Likewise.
* libgnarl/s-tpopsp__vxworks-tls.adb: Likewise.
* libgnarl/s-tpopsp__vxworks.adb: Likewise.
* libgnarl/s-tporft.adb: Likewise.
* libgnarl/s-tposen.adb: Likewise.
* libgnarl/s-tposen.ads: Likewise.
* libgnarl/s-vxwext.adb: Likewise.
* libgnarl/s-vxwext.ads: Likewise.
* libgnarl/s-vxwext__kernel-smp.adb: Likewise.
* libgnarl/s-vxwext__kernel.adb: Likewise.
* libgnarl/s-vxwext__kernel.ads: Likewise.
* libgnarl/s-vxwext__noints.adb: Likewise.
* libgnarl/s-vxwext__rtp-smp.adb: Likewise.
* libgnarl/s-vxwext__rtp.adb: Likewise.
* libgnarl/s-vxwext__rtp.ads: Likewise.
* libgnarl/s-vxwext__vthreads.ads: Likewise.
* libgnarl/s-vxwork__aarch64.ads: Likewise.
* libgnarl/s-vxwork__arm.ads: Likewise.
* libgnarl/s-vxwork__ppc.ads: Likewise.
* libgnarl/s-vxwork__x86.ads: Likewise.
* libgnarl/thread.c: Likewise.
* libgnat/a-assert.adb: Likewise.
* libgnat/a-assert.ads: Likewise.
* libgnat/a-btgbso.adb: Likewise.
* libgnat/a-btgbso.ads: Likewise.
* libgnat/a-calari.adb: Likewise.
* libgnat/a-calari.ads: Likewise.
* libgnat/a-calcon.adb: Likewise.
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* libgnat/a-caldel.adb: Likewise.
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* libgnat/a-calend.adb: Likewise.
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* libgnat/a-calfor.adb: Likewise.
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* libgnat/a-catizo.adb: Likewise.
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* libgnat/a-cbhase.adb: Likewise.
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* libgnat/a-cborma.adb: Likewise.
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* libgnat/a-cborse.adb: Likewise.
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* libgnat/a-cdlili.adb: Likewise.
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* tempdir.ads: Likewise.
* terminals.c: Likewise.
* tracebak.c: Likewise.
* treepr.adb: Likewise.
* treepr.ads: Likewise.
* ttypes.ads: Likewise.
* types.adb: Likewise.
* types.ads: Likewise.
* types.h: Likewise.
* uintp.adb: Likewise.
* uintp.ads: Likewise.
* uintp.h: Likewise.
* uname.adb: Likewise.
* uname.ads: Likewise.
* urealp.adb: Likewise.
* urealp.ads: Likewise.
* urealp.h: Likewise.
* usage.adb: Likewise.
* usage.ads: Likewise.
* validsw.adb: Likewise.
* validsw.ads: Likewise.
* vast.adb: Likewise.
* vast.ads: Likewise.
* warnsw.adb: Likewise.
* warnsw.ads: Likewise.
* widechar.adb: Likewise.
* widechar.ads: Likewise.
* xeinfo.adb: Likewise.
* xnmake.adb: Likewise.
* xoscons.adb: Likewise.
* xr_tabls.adb: Likewise.
* xr_tabls.ads: Likewise.
* xref_lib.adb: Likewise.
* xref_lib.ads: Likewise.
* xsinfo.adb: Likewise.
* xsnamest.adb: Likewise.
* xtreeprs.adb: Likewise.
* xutil.adb: Likewise.
* xutil.ads: Likewise.

[Ada] Remove unused initial values in expansion of distributed calls

gcc/ada/

* exp_dist.adb (Build_From_Any_Call): Remove initial value for
Fnam; fix style.
(Build_To_Any_Call): Remove initial value for Fnam.
(Build_TypeCode_Call): Likewise.

[Ada] Replace calls to RTE with Is_RTE where possible

gcc/ada/

* checks.adb, exp_aggr.adb, exp_attr.adb, exp_ch6.adb,
exp_disp.adb, exp_imgv.adb, exp_util.adb, sem_attr.adb,
sem_ch13.adb, sem_ch8.adb, sem_eval.adb, sem_scil.adb,
sem_util.adb: Replace calls to RTE with Is_RTE.

[Ada] Replace call with a reference to a local constant

gcc/ada/

* sem_ch4.adb (Try_Object_Operation): Reuse local constant.

[Ada] Error message on invalid prefixed procedure call

gcc/ada/

* sem_ch4.adb (Try_Object_Operation): When a prefixed call is
overloaded and illegal, and the All_Errors flag is off, generate
an error message if the re-analysis of some candidate
interpretation fails to produce one.

[Ada] Rename package instead of each routine

gcc/ada/

* libgnat/g-casuti.adb: Replace with "pragma No_Body".
* libgnat/g-casuti.ads: Replace with a package renaming.

[Ada] Fix attributes Version and Body_Version for concurrent units

gcc/ada/

* sem_attr.adb (Check_Program_Unit): Fix references to
Concurrent_Kind and Is_Concurrent_Type; avoid repeated calls to
Entity.

[Ada] Allow attributes Version and Body_Version prefixed by entries

gcc/ada/

* sem_attr.adb (Check_Program_Unit): Replace tests for Task_Kind
and Protected_Kind with a collective test for Concurrent_Kind;
likewise, replace calls to Is_Task_Type and Is_Protected_Type
with a collective call to Is_Concurrent_Type; simplify into a
single membership test; add missing Entry_Kind alternative.

[Ada] Fix typos in calls to Error_Msg_NE

gcc/ada/

* sem_aggr.adb (Resolve_Record_Aggregate): Fix casing in error
message.
* sem_ch3.adb (Add_Internal_Interface_Entities): Fix unbalanced
parens.
* sem_elim.adb (Eliminate_Error_Msg): Add insertion character.

[Ada] Fix calls to Error_Msg_NE instead of Error_Msg_N

gcc/ada/

* freeze.adb (Freeze_Profile): Replace Error_Msg_NE with
Error_Msg_N; change to continuation message.
* sem_cat.adb, sem_ch10.adb, sem_ch12.adb, sem_ch5.adb: Replace
calls to Error_Msg_NE with calls to Error_Msg_N.

[Ada] Remove leading and trailing spaces in error messages

gcc/ada/

* exp_disp.adb, sem_aggr.adb, sem_cat.adb, sem_ch10.adb,
sem_ch12.adb, sem_ch3.adb, sem_ch4.adb, sem_ch5.adb,
sem_ch6.adb, sem_ch8.adb, sem_ch9.adb, sem_prag.adb,
sem_res.adb: Remove extra leading and trailing space in error
messages.

[Ada] Remove confusing warning on type export

gcc/ada/

* sem_prag.adb (Set_Exported): Do not warn on exporting a type.

[Ada] Spurious warning about premature use of selected component

gcc/ada/

* sem_warn.adb (Check_References): Do not emit warning on a
selected component when enclosing type has no discriminant and
type of component has partial initialization.

[Ada] Expansion in _postconditions confusing CodePeer

gcc/ada/

* contracts.adb (Build_Postconditions_Procedure): Remove
internally generated if statement used to control finalization
actions.
* exp_ch6.adb (Add_Return, Expand_Non_Function_Return,
Expand_Simple_Function_Return): Add if statement around
_postconditions to control finalization.
* exp_ch7.adb (Build_Finalizer): Likewise.
* sem_prag.adb (Find_Related_Declaration_Or_Body): Add case to
handle Context itself being a handled sequence of statements.

[Ada] Spurious accessibility error on call in return statement

gcc/ada/

* sem_util.adb (In_Return_Value): Modified to detect when
implicit dereference is specified on the return type of a
function call within the expression being checked.

[Ada] Crash on aggregate in function call in object declaration

gcc/ada/

* exp_aggr.adb (Expand_Array_Aggregate): If the parent node of
the aggregate is a subprogram call there is no target in which
to build the aggregate, and it has to be expanded into component
assignments.

[Ada] Code and style cleanups for CUDA

gcc/ada/

* exp_prag.adb (Expand_Pragma_CUDA_Execute): Refill comments;
remove periods after single-line comments; use procedural
variant of Next_Entity.
* gnat_cuda.adb: Refill comments; remove periods after
single-line comments; replace calls to UI_From_Int with
constants; change iteration bounds so they match the comments.
* sem_prag.adb (Analyze_Pragma): Add checks for malformed pragma
CUDA_Kernel aggregate; simplify processing of pragma CUDA_Global
with Check_Arg_Count; sync comment with code for CUDA_Global.

[Ada] No_Implicit_Loops restriction and pragma Assert

gcc/ada/

* tbuild.adb (Make_Implicit_Loop_Statement): Disable restriction
checking on dead paths.

[Ada] Spurious warning on postcondition and result

gcc/ada/

* sem_util.adb (Check_Result_And_Post_State): Replace custom
Has_In_Out_Parameter with existing Has_Out_Or_In_Out_Parameter
flag which corresponds exactly to what we need.

[Ada] Code cleanup

gcc/ada/

* libgnat/a-ztcoio.adb: Remove unused with clause.

[Ada] Cleanup processing of aspect Dynamic_Predicate

gcc/ada/

* sem_ch13.adb (Build_Predicate_Functions): Fix typo in comment.
(Resolve_Aspect_Expressions): Fix typo in comment; remove
redundant check for no aspects; simplify with Discard_Node.

[Ada] Compiler aborts on a constrained subtype of a predicated type

gcc/ada/

* sem_util.adb (Build_Constrained_Itype): Remove prior patch,
issue is better handled in Sem_Ch13.Build_Predicate_Functions.
* sem_ch13.adb (Build_Predicate_Functions): Do not build
predicate function for an Itype with a defined
Predicated_Parent, even if that designated parent does not yet
have a Predicate_Function. This can happen in instance bodies
nested within a generic unit.

Daily bump.

libstdc++: Move unix.org reference to https

libstdc++-v3/ChangeLog:

* doc/xml/manual/ctype.xml: Move unix.org reference to https.
* doc/html/manual/facets.html: Regenerate.

aix: Redesign section encoding and selection

AIX symbol references can refer to either the symbol (a label) or a
symbol with a qualifier (the storage mapping class).  The storage mapping
class provide information about the underlying COFF section into which the
symbol will be placed, e.g. [RO] for read-only in the text section,
[RW] for read-writer in the data section, or [BS] for the BSS section.
A label is distinct from a qualname in the assembler language, e.g.,
foo and foo[RW] are different, but the symbol table of an object file strips
the storage mapping class from the name, so that it no longer is relevant
when referring to symbols across object files and libraries.

.csect .data[RW]
i:

is a label "i" in the .data CSECT, which has storage mapping class [RW]
so that it is placed in the read-write COFF section.

.csect i[RW]

is a CSECT "i[RW]".  BSS does not allow interior labels.

The AIX port of GCC had been emitting the storage mapping class where
appropriate but not consistently using the storage mapping class on
the DECL or SYM name.  This patch updates the section encoding to properly
place storage mapping class on symbol names and remove the decorations
placed when emitting the symbol.

The mapping classes correspond to sections and the encoding choices must
exactly match the section choices made by get_section, so the logic for
the computation of reloc in get_variable_section is split into its own
function that XCOFF encode section info can call.

gcc/ChangeLog:

* varasm.c (compute_reloc_for_var): Split out from...
(get_variable_section): Use it.
* output.h (compute_reloc_for_var): Declare.
* config/rs6000/rs6000-protos.h
(rs6000_xcoff_asm_output_aligned_decl_common): Change alignment to
unsigned int.
* config/rs6000/rs6000.c (rs6000_legitimize_tls_address_aix):
Don't append storage mapping class to symbol.
(rs6000_xcoff_asm_named_section): Add BS and UL mapping classes.
Don't convert TLS BSS to common.
(rs6000_xcoff_unique_section): Don't fall back to select_secton.
(rs6000_xcoff_section_type_flags): Add SECTION_BSS if DECL is
bss_initializer.
(rs6000_xcoff_asm_globalize_decl_name): Don't strip storage
mapping class.
(rs6000_xcoff_asm_output_aligned_decl_common): Align is unsigned int.
If align is 0 from TLS class, use the same rules as varasm.c
If not common, switch to BSS section manually.
If common, emit appropriate comm or lcomm directive.
(rs6000_xcoff_encode_section_info): Add logic to append all
storage mapping classes.
(rs6000_asm_weaken_decl): Adjust for qualname symbols.
* config/rs6000/xcoff.h (ASM_OUTPUT_ALIGNED_DECL_LOCAL): Use
rs6000_xcoff_asm_output_aligned_decl_common.
(ASM_OUTPUT_ALIGNED_DECL_LOCAL): Use
rs6000_xcoff_asm_output_aligned_decl_common.
(ASM_OUTPUT_TLS_COMMON): Use
rs6000_xcoff_asm_output_aligned_decl_common.

gcc/testsuite/ChangeLog:
* g++.dg/ext/visibility/fvisibility-inlines-hidden-4.C: Expect [BS]
mapping class on AIX.
* gcc.c-torture/compile/pr61159.c: XFAIL on AIX.
* gcc.c-torture/execute/alias-2.c: Same.
* gcc.dg/alias-7.c: Same.

Fortran: Async I/O - avoid unlocked unlocking [PR100352]

Follow up to PR100352, which moved unit unlocking to st_*_done_worker to
avoid lock order reversal; however, as async_io uses a different lock,
the (unlocked locked) unit lock shall not be unlocked there.

libgfortran/ChangeLog:

PR libgomp/100352
* io/transfer.c (st_read_done_worker, st_write_done_worker): Add new
arg whether to unlock unit.
(st_read_done, st_write_done): Call it with true.
* io/async.c (async_io): Call it with false.
* io/io.h (st_write_done_worker, st_read_done_worker): Update prototype.

nvptx: Fix up nvptx build against latest libstdc++ [PR100375]

The r12-220-gd96db15967e78d7cecea3b1cf3169ceb924678ac change
deprecated some non-standard std::pair constructors and that apparently
broke nvptx.c build, where pseudo_node_t is std::pair<struct basic_block_def *, int>
and so nullptr (or NULL) needs to be used for the first argument of the
ctors instead of 0.

2021-05-02  Jakub Jelinek  <jakub@redhat.com>

PR target/100375
* config/nvptx/nvptx.c (nvptx_sese_pseudo): Use nullptr instead of 0
as first argument of pseudo_node_t constructors.

i386: Fix up plugin header install on x86 [PR100336]

The recent addition of i386-isa.def which is included from i386.h results
in failures to build gcc plugins, the i386.h header is installed, but
i386-isa.def is not.

2021-05-02  Jakub Jelinek  <jakub@redhat.com>

PR target/100336
* config/i386/t-i386 (TM_H): Add $(srcdir)/config/i386/i386-isa.def.

Daily bump.

c++: C++11 range-for and ovl/lkp_iterator

We can't use C++11 range-based 'for' over a tree directly, because we don't
know what kind of range we want to use it as.  I suppose in some cases we
could guess, but it seems better to tersely make it explicit.  This patch
adds range adaptors ovl_range and lkp_range for use as the range of a
range-for, e.g.

  for (tree fn : lkp_range (fns)) { ... }

This patch also removes the private copy ops from ovl_iterator; it's
necessary for range-for, and these are effectively C++ forward_iterators,
which allow copying, so I don't see a reason to prevent it.  A bit more
would need to be done to make them actually conform as C++11 forward
iterators, but I don't think we particularly want to #include <iterator>
yet.

gcc/cp/ChangeLog:

* cp-tree.h (class ovl_iterator): Allow copying.  Add op==.
(class ovl_range, class lkp_range): New.
* call.c (build_op_call_1, add_candidates): Use them.
(build_op_delete_call, has_trivial_copy_assign_p): Likewise.
(has_trivial_copy_p): Likewise.
* class.c (handle_using_decl, get_basefndecls): Likewise.
(maybe_warn_about_overly_private_class): Likewise.
(warn_hidden, add_implicitly_declared_members): Likewise.
(check_methods, clone_constructors_and_destructors): Likewise.
(type_has_user_nondefault_constructor): Likewise.

Add GTY support for irange.

Right now we have GTY support for static storage iranges
(int_range<>).  However, there's no reason why the base
class can't be used with GC, other than it was an oversight.

For that matter, the base class has a pointer to the sub-range
storage, so we can use the same implementation for both.  This
patch does so.

I have also removed the DEFINE_INT_RANGE_GC_STUBS
stuff, and have documented why we need a separate
gt_pch_nx (int_range<1> *&) version.  This has to do with
hash-traits.h, which ipa-prop.c is using to store a value_range.
The header file hash-traits.h is defining an extern of
gt_pch_nx (int_range<1> *&) etc, instead of calling the
more generic (int_range<1> *) which is already available.

It seems suspect that has-traits.h has their own externs
for GC functions, and if someone has a better solution, I'd
be glad to hear it.

gcc/ChangeLog:

* value-range.cc (DEFINE_INT_RANGE_GC_STUBS): Remove.
(gt_pch_nx (int_range<1> *&)): New.
(gt_ggc_mx (int_range<1> *&)): New.
* value-range.h (class irange): Add GTY support for
the base class.

doc/options.texi: Fix the description of 'Negative'.

gcc/ChangeLog:
* doc/options.texi (Negative): Change either or to both and.

Daily bump.

libstdc++: Implement P2328 changes to join_view

This implements the wording changes of P2328R0 "join_view should join
all views of ranges".

libstdc++-v3/ChangeLog:

* include/std/ranges (__detail::__non_propating_cache): Define
as per P2328.
(join_view): Remove constraints on the value and reference types
of the wrapped iterator type as per P2328.
(join_view::_Iterator::_M_satisfy): Adjust as per P2328.
(join_view::_Iterator::operator++): Likewise.
(join_view::_M_inner): Use __non_propating_cache as per P2328.
Remove now-redundant use of __maybe_present_t.
* testsuite/std/ranges/adaptors/join.cc: Include <array>.
(test10): New test.

libstdc++: Fix inconsistent feature test macros

The __cpp_lib_constexpr_string and __cpp_lib_semaphore feature test
macros are not defined consistently in <version> and the relevant header
for the feature.

libstdc++-v3/ChangeLog:

* include/bits/basic_string.h (__cpp_lib_constexpr_string):
Only define for C++17 and later.
* include/std/version (__cpp_lib_semaphore): Fix condition
to match the one in <semaphore>.

libstdc++: Remove GLIBCXX_CHECK_INT64_T checks

This simplifies the definition of std::streamoff by using the predefined
__INT64_TYPE__ macro, instead of the _GLIBCXX_HAVE_INT64_T_LONG,
_GLIBCXX_HAVE_INT64_T_LONG_LONG and _GLIBCXX_HAVE_INT64_T macros defined
by configure.

By using the __INT64_TYPE__ macro (which all of GCC, Clang and Intel
define) we do not need to determine the type of int64_t in configure, we
can just use that type directly.

The background for the change was explained by David Edelsohn:

  Currently the type of streamoff is determined at libstdc++ configure
  time, chosen by the definitions of _GLIBCXX_HAVE_INT64_T_LONG and
  _GLIBCXX_HAVE_INT64_T_LONG_LONG.  For a multilib configuration, the
  difference is encoded in the different multilib header file paths.
  For "FAT" library targets that package 32 bit and 64 bit libraries
  together, G++ also expects a single header file directory hierarchy,
  causing an incorrect value for streamoff in some situations.

And in a subsequent mail:

  Most of the libstdc++ headers are architecture-neutral, OS neutral and
  ABI neutral.  The differences are localized in bits/c++config.h.  And
  most of c++config.h is identical for 32 bit AIX and 64 bit AIX.  The
  only differences that matter are __int128 and __int64_t.

This change removes some of those differences. With the only uses of the
INT64_T configure macros removed, the configure checks themselves can
also be removed.

Co-authored-by: David Edelsohn <dje.gcc@gmail.com>
libstdc++-v3/ChangeLog:

* acinclude.m4 (GLIBCXX_CHECK_INT64_T): Delete.
* config.h.in: Regenerate.
* configure: Regenerate.
* configure.ac: Do not use GLIBCXX_CHECK_INT64_T.
* include/bits/postypes.h: Remove include of <stdint.h> and
definition/undefinition of the __STDC_LIMIT_MACROS and
__STDC_CONSTANT_MACROS macros.
(streamoff): Use __INT64_TYPE__ if defined.

testsuite: aarch64: Add fusion tests for FP vml[as] intrinsics

Add compilation tests to make sure that the output of vmla/vmls
floating-point Neon intrinsics (fmul, fadd/fsub) is not fused into
fmla/fmls instructions.

gcc/testsuite/ChangeLog:

2021-02-16  Jonathan Wright  <jonathan.wright@arm.com>

* gcc.target/aarch64/advsimd-intrinsics/vmla_float_not_fused.c:
New test.
* gcc.target/aarch64/advsimd-intrinsics/vmls_float_not_fused.c:
New test.

aarch64: Use RTL builtins for FP ml[as][q]_laneq intrinsics

Rewrite floating-point vml[as][q]_laneq Neon intrinsics to use RTL
builtins rather than relying on the GCC vector extensions. Using RTL
builtins allows control over the emission of fmla/fmls instructions
(which we don't want here.)

With this commit, the code generated by these intrinsics changes from
a fused multiply-add/subtract instruction to an fmul followed by an
fadd/fsub instruction. If the programmer really wants fmla/fmls
instructions, they can use the vfm[as] intrinsics.

gcc/ChangeLog:

2021-02-17  Jonathan Wright  <jonathan.wright@arm.com>

* config/aarch64/aarch64-simd-builtins.def: Add
float_ml[as][q]_laneq builtin generator macros.
* config/aarch64/aarch64-simd.md (mul_laneq<mode>3): Define.
(aarch64_float_mla_laneq<mode>): Define.
(aarch64_float_mls_laneq<mode>): Define.
* config/aarch64/arm_neon.h (vmla_laneq_f32): Use RTL builtin
instead of GCC vector extensions.
(vmlaq_laneq_f32): Likewise.
(vmls_laneq_f32): Likewise.
(vmlsq_laneq_f32): Likewise.

aarch64: Use RTL builtins for FP ml[as][q]_lane intrinsics

Rewrite floating-point vml[as][q]_lane Neon intrinsics to use RTL
builtins rather than relying on the GCC vector extensions. Using RTL
builtins allows control over the emission of fmla/fmls instructions
(which we don't want here.)

With this commit, the code generated by these intrinsics changes from
a fused multiply-add/subtract instruction to an fmul followed by an
fadd/fsub instruction. If the programmer really wants fmla/fmls
instructions, they can use the vfm[as] intrinsics.

gcc/ChangeLog:

2021-02-16  Jonathan Wright  <jonathan.wright@arm.com>

* config/aarch64/aarch64-simd-builtins.def: Add
float_ml[as]_lane builtin generator macros.
* config/aarch64/aarch64-simd.md (*aarch64_mul3_elt<mode>):
Rename to...
(mul_lane<mode>3): This, and re-order arguments.
(aarch64_float_mla_lane<mode>): Define.
(aarch64_float_mls_lane<mode>): Define.
* config/aarch64/arm_neon.h (vmla_lane_f32): Use RTL builtin
instead of GCC vector extensions.
(vmlaq_lane_f32): Likewise.
(vmls_lane_f32): Likewise.
(vmlsq_lane_f32): Likewise.

aarch64: Use RTL builtins for FP ml[as] intrinsics

Rewrite floating-point vml[as][q] Neon intrinsics to use RTL builtins
rather than relying on the GCC vector extensions. Using RTL builtins
allows control over the emission of fmla/fmls instructions (which we
don't want here.)

With this commit, the code generated by these intrinsics changes from
a fused multiply-add/subtract instruction to an fmul followed by an
fadd/fsub instruction. If the programmer really wants fmla/fmls
instructions, they can use the vfm[as] intrinsics.

gcc/ChangeLog:

2021-02-16  Jonathan Wright  <jonathan.wright@arm.com>

* config/aarch64/aarch64-simd-builtins.def: Add float_ml[as]
builtin generator macros.
* config/aarch64/aarch64-simd.md (aarch64_float_mla<mode>):
Define.
(aarch64_float_mls<mode>): Define.
* config/aarch64/arm_neon.h (vmla_f32): Use RTL builtin
instead of relying on GCC vector extensions.
(vmla_f64): Likewise.
(vmlaq_f32): Likewise.
(vmlaq_f64): Likewise.
(vmls_f32): Likewise.
(vmls_f64): Likewise.
(vmlsq_f32): Likewise.
(vmlsq_f64): Likewise.
* config/aarch64/iterators.md: Define VDQF_DF mode iterator.

aarch64: Use RTL builtins for FP ml[as]_n intrinsics

Rewrite floating-point vml[as][q]_n Neon intrinsics to use RTL
builtins rather than inline assembly code, allowing for better
scheduling and optimization.

gcc/ChangeLog:

2021-01-18  Jonathan Wright  <jonathan.wright@arm.com>

* config/aarch64/aarch64-simd-builtins.def: Add
float_ml[as]_n_builtin generator macros.
* config/aarch64/aarch64-simd.md (*aarch64_mul3_elt_from_dup<mode>):
Rename to...
(mul_n<mode>3): This, and re-order arguments.
(aarch64_float_mla_n<mode>): Define.
(aarch64_float_mls_n<mode>): Define.
* config/aarch64/arm_neon.h (vmla_n_f32): Use RTL builtin
instead of inline asm.
(vmlaq_n_f32): Likewise.
(vmls_n_f32): Likewise.
(vmlsq_n_f32): Likewise.

aarch64: Use RTL builtins for vmull[_high]_p8 intrinsics

Rewrite vmull[_high]_p8 Neon intrinsics to use RTL builtins rather
than inline assembly code, allowing for better scheduling and
optimization.

gcc/ChangeLog:

2021-02-05  Jonathan Wright  <joanthan.wright@arm.com>

* config/aarch64/aarch64-simd-builtins.def: Add pmull[2]
builtin generator macros.
* config/aarch64/aarch64-simd.md (aarch64_pmullv8qi): Define.
(aarch64_pmull_hiv16qi_insn): Define.
(aarch64_pmull_hiv16qi): Define.
* config/aarch64/arm_neon.h (vmull_high_p8): Use RTL builtin
instead of inline asm.
(vmull_p8): Likewise.

AVR cc0 conversion - adjust peepholes

This patch adjusts peepholes to match and generate parallels with
a clobber of REG_CC.

It also sets mov<mode>_insn as the name of the pattern for the split
insn (rather than the define_insn_and_split), so that
avr_2word_insn_p, which looks for CODE_FOR_mov<mode>_insn, works
correctly. This is required for the *cpse.eq peephole to fire, and
also helps generate better code for avr_out_sbxx_branch.

gcc/ChangeLog:

* config/avr/avr.md: Adjust peepholes to match and
generate parallels with clobber of REG_CC.
(mov<mode>_insn): Rename to mov<mode>_insn_split.
(*mov<mode>_insn): Rename to mov<mode>_insn.

middle-end: Disable section anchors for VAR_DECLs if -fdata-sections

-fdata-sections places data symbols into their own, unique, named sections.
-fsection-anchors create an anchor to access neighboring symbols
within a section.

When both are enabled, a separate section anchor is created for each
symbol, which provides no benefit.

This patch updates the common gating function use_blocks_for_decl_p() to
return false if -fdata-sections is enabled.

gcc/ChangeLog:

* varasm.c (use_blocks_for_decl_p): Don't use section anchors
for VAR_DECLs if -fdata-sections enabled.

Define target hook to emit KFmode constants for libgcc.

This patch defines a target hook so that the KFmode constants
(__LIBGCC_KF_MAX__, __LIBGCC_KF_MIN__, and __LIBGCC_KF_EPSILON__) needed to
build _divkc3.c in libgcc are defined.  The need for these constants were added
in the April 28th changes to libgcc that added complex division optimizations.

We only define the KFmode constants if IEEE 128-bit floating point is
supported, but long double does not use the IEEE 128-bit format.  If long
double uses the IEEE 128-bit format, it will use TFmode and not KFmode.

gcc/
2021-04-30  Michael Meissner  <meissner@linux.ibm.com>

PR bootstrap/100327
* config/rs6000/rs6000.c
(TARGET_LIBGCC_FLOATING_MODE_SUPPORTED_P): Define.
(rs6000_libgcc_floating_mode_supported_p): New target hook.

Refactor backward threader registry and profitability code into classes.

This refactors the registry and the profitability code from the
backwards threader into two separate classes.  It cleans up the code,
and makes it easier for alternate implementations to share code.

gcc/ChangeLog:

* tree-ssa-threadbackward.c (class thread_jumps): Split out code
from here...
(class back_threader_registry): ...to here...
(class back_threader_profitability): ...and here...
(thread_jumps::thread_through_all_blocks): Remove argument.
(back_threader_registry::back_threader_registry): New.
(back_threader_registry::~back_threader_registry): New.
(back_threader_registry::thread_through_all_blocks): New.
(thread_jumps::profitable_jump_thread_path): Move from here...
(back_threader_profitability::profitable_path_p): ...to here.
(thread_jumps::find_taken_edge): New.
(thread_jumps::convert_and_register_current_path): Move...
(back_threader_registry::register_path): ...to here.
(thread_jumps::register_jump_thread_path_if_profitable): Move...
(thread_jumps::maybe_register_path): ...to here.
(thread_jumps::handle_phi): Call find_taken_edge and
maybe_register_path.
(thread_jumps::handle_assignment): Same.
(thread_jumps::fsm_find_control_statement_thread_paths): Remove
tree argument to handle_phi and handle_assignment.
(thread_jumps::find_jump_threads_backwards): Set m_name.  Remove
set of m_speed_p and m_max_threaded_paths.
(pass_thread_jumps::execute): Remove second argument from
find_jump_threads_backwards.
(pass_early_thread_jumps::execute): Same.

Jump threader refactor.

This is an overall refactor of the jump threader, both for the low level
bits in tree-ssa-threadupdate.* and the high level bits in
tree-ssa-threadedge.*.

There should be no functional changes.

Some of the benefits of the refactor are:

a) Eliminates some icky global state (for example the x_vr_values hack).

b) Provides some semblance of an API for the threader.

c) Makes it clearer to see what parts are from the high level
threader, and what parts belong in the low level path registry and
BB threading mechanism.

d) Avoids passing a ton of variables around.

e) Provides for easier sharing with the backward threader.

f) Merged simplify stmt code in VRP and DOM as they were nearly
identical.

This has been bootstrapped and regression tested on x86-64 Linux.
Jeff had also been testing this path as part of his Fedora throughout the
off-season.

gcc/ChangeLog:

* tree-ssa-dom.c (class dom_jump_threader_simplifier): New.
(class dom_opt_dom_walker): Initialize some class variables.
(pass_dominator::execute): Pass evrp_range_analyzer and
dom_jump_threader_simplifier to dom_opt_dom_walker.
Adjust for some functions moving into classes.
(simplify_stmt_for_jump_threading): Adjust and move to...
(jump_threader_simplifier::simplify): ...here.
(dom_opt_dom_walker::before_dom_children): Adjust for
m_evrp_range_analyzer.
(dom_opt_dom_walker::after_dom_children): Remove x_vr_values hack.
(test_for_singularity): Place in dom_opt_dom_walker class.
(dom_opt_dom_walker::optimize_stmt): The argument
evrp_range_analyzer is now a class field.
* tree-ssa-threadbackward.c (class thread_jumps): Add m_registry.
(thread_jumps::thread_through_all_blocks): New.
(thread_jumps::convert_and_register_current_path): Use m_registry.
(pass_thread_jumps::execute): Adjust for thread_through_all_blocks
being in the threader class.
(pass_early_thread_jumps::execute): Same.
* tree-ssa-threadedge.c (threadedge_initialize_values): Move...
(jump_threader::jump_threader): ...here.
(threadedge_finalize_values): Move...
(jump_threader::~jump_threader): ...here.
(jump_threader::remove_jump_threads_including): New.
(jump_threader::thread_through_all_blocks): New.
(record_temporary_equivalences_from_phis): Move...
(jump_threader::record_temporary_equivalences_from_phis): ...here.
(record_temporary_equivalences_from_stmts_at_dest): Move...
(jump_threader::record_temporary_equivalences_from_stmts_at_dest):
Here...
(simplify_control_stmt_condition_1): Move to jump_threader class.
(simplify_control_stmt_condition): Move...
(jump_threader::simplify_control_stmt_condition): ...here.
(thread_around_empty_blocks): Move...
(jump_threader::thread_around_empty_blocks): ...here.
(thread_through_normal_block): Move...
(jump_threader::thread_through_normal_block): ...here.
(thread_across_edge): Move...
(jump_threader::thread_across_edge): ...here.
(thread_outgoing_edges): Move...
(jump_threader::thread_outgoing_edges): ...here.
* tree-ssa-threadedge.h: Move externally facing functings...
(class jump_threader): ...here...
(class jump_threader_simplifier): ...and here.
* tree-ssa-threadupdate.c (struct redirection_data): Remove comment.
(jump_thread_path_allocator::jump_thread_path_allocator): New.
(jump_thread_path_allocator::~jump_thread_path_allocator): New.
(jump_thread_path_allocator::allocate_thread_edge): New.
(jump_thread_path_allocator::allocate_thread_path): New.
(jump_thread_path_registry::jump_thread_path_registry): New.
(jump_thread_path_registry::~jump_thread_path_registry): New.
(jump_thread_path_registry::allocate_thread_edge): New.
(jump_thread_path_registry::allocate_thread_path): New.
(dump_jump_thread_path): Make extern.
(debug (const vec<jump_thread_edge *> &path)): New.
(struct removed_edges): Move to tree-ssa-threadupdate.h.
(struct thread_stats_d): Remove.
(remove_ctrl_stmt_and_useless_edges): Make static.
(lookup_redirection_data): Move...
(jump_thread_path_registry::lookup_redirection_data): ...here.
(ssa_redirect_edges): Make static.
(thread_block_1): Move...
(jump_thread_path_registry::thread_block_1): ...here.
(thread_block): Move...
(jump_thread_path_registry::thread_block): ...here.
(thread_through_loop_header):  Move...
(jump_thread_path_registry::thread_through_loop_header): ...here.
(mark_threaded_blocks): Move...
(jump_thread_path_registry::mark_threaded_blocks): ...here.
(debug_path): Move...
(jump_thread_path_registry::debug_path): ...here.
(debug_all_paths): Move...
(jump_thread_path_registry::dump): ..here.
(rewire_first_differing_edge): Move...
(jump_thread_path_registry::rewire_first_differing_edge): ...here.
(adjust_paths_after_duplication): Move...
(jump_thread_path_registry::adjust_paths_after_duplication): ...here.
(duplicate_thread_path): Move...
(jump_thread_path_registry::duplicate_thread_path): ..here.
(remove_jump_threads_including): Move...
(jump_thread_path_registry::remove_jump_threads_including): ...here.
(thread_through_all_blocks): Move to...
(jump_thread_path_registry::thread_through_all_blocks): ...here.
(delete_jump_thread_path): Remove.
(register_jump_thread): Move...
(jump_thread_path_registry::register_jump_thread): ...here.
* tree-ssa-threadupdate.h: Move externally facing functions...
(class jump_thread_path_allocator): ...here...
(class jump_thread_path_registry): ...and here.
(thread_through_all_blocks): Remove.
(struct removed_edges): New.
(register_jump_thread): Remove.
(remove_jump_threads_including): Remove.
(delete_jump_thread_path): Remove.
(remove_ctrl_stmt_and_useless_edges): Remove.
(free_dom_edge_info): New prototype.
* tree-vrp.c: Remove x_vr_values hack.
(class vrp_jump_threader_simplifier): New.
(vrp_jump_threader_simplifier::simplify): New.
(vrp_jump_threader::vrp_jump_threader): Adjust method signature.
Remove m_dummy_cond.
Instantiate m_simplifier and m_threader.
(vrp_jump_threader::thread_through_all_blocks): New.
(vrp_jump_threader::simplify_stmt): Remove.
(vrp_jump_threader::after_dom_children): Do not set m_dummy_cond.
Remove x_vr_values hack.
(execute_vrp): Adjust for thread_through_all_blocks being in a
class.

libstdc++: Implement proposed resolution for LWG 3532

libstdc++-v3/ChangeLog:

* include/std/ranges (split_view::_InnerIter::operator++):
Depend on _Base instead of _Vp directly, as per LWG 3532.

libstdc++: Implement P2367 changes to avoid some list-initialization

This implements the wording changes of P2367R0 "Remove misuses of
list-initialization from Clause 24", modulo the parts that depend
on P1739R4 which we don't yet implement (due to LWG 3407).

libstdc++-v3/ChangeLog:

* include/bits/ranges_util.h (subrange::subrange): Avoid
list-initialization in delegating constructor.
* include/std/ranges (single_view): Replace implicit guide
with explicit deduction guide that decays its argument.
(_Single::operator()): Avoid CTAD when constructing the
single_view object.
(_Iota::operator()): Avoid list-initialization.
(__detail::__can_filter_view, _Filter::operator()): Likewise.
(__detail::__can_transform_view, _Transform::operator()): Likewise.
(take_view::begin): Likewise.
(__detail::__can_take_view, _Take::operator()): Likewise.
(__detail::__can_take_while_view, _TakeWhile::operator()): Likewise.
(__detail::__can_drop_view, _Drop::operator()): Likewise.
(__detail::__can_drop_while_view, _DropWhile::operator()): Likewise.
(split_view::split_view): Use views::single when initializing
_M_pattern.
(__detail::__can_split_view, _Split::operator()): Avoid
list-initialization.
(_Counted::operator()): Likewise.
* testsuite/std/ranges/p2367.cc: New test.

libstdc++: Use std::addressof to avoid ADL for operator& [PR 60497]

This is another small step towards avoiding the problems described in PR
60497, by using std::addressof to avoid ADL, so that we don't require
all template arguments to be complete.

libstdc++-v3/ChangeLog:

PR libstdc++/60497
* include/bits/basic_ios.tcc (basic_ios::copyfmt): use
std::addressof.
* include/bits/basic_string.tcc (basic_string::swap)
(basic_string::assign): Likewise.
* include/bits/deque.tcc (deque::operator=(const deque&)):
Likewise.
* include/bits/stl_tree.h (_Rb_tree::operator=(const * _Rb_tree&)):
Likewise.
* include/bits/vector.tcc (vector::operator=(const vector&)):
Likewise.

libstdc++: Implement LWG 1203 for rvalue iostreams

This implements the resolution of LWG 1203 so that the constraints for
rvalue stream insertion/extraction are simpler, and the return type is
the original rvalue stream type not its base class.

Signed-off-by: Jonathan Wakely <jwakely@redhat.com>
libstdc++-v3/ChangeLog:

* include/std/istream (operator>>(Istream&&, x&)): Simplify, as
per LWG 1203.
* include/std/ostream (operator<<(Ostream&&, const x&)):
Likewise.
* testsuite/27_io/basic_istream/extractors_character/char/lwg2499_neg.cc:
Adjust dg-error pattern.
* testsuite/27_io/basic_istream/extractors_character/wchar_t/lwg2499_neg.cc:
Likewise.
* testsuite/27_io/basic_istream/extractors_other/char/4.cc: Define
is_extractable trait to replace std::__is_extractable. Make it
work with rvalue streams as well as lvalues, to replace f() and
g() helper functions.
* testsuite/27_io/basic_istream/extractors_other/wchar_t/4.cc:
Likewise.
* testsuite/27_io/basic_ostream/inserters_other/char/6.cc:
Define is_insertable trait to replace std::__is_insertable. Make
it work with rvalue streams as well as lvalues, to replace f()
and g() helper functions.
* testsuite/27_io/basic_ostream/inserters_other/wchar_t/6.cc:
Likewise.
* testsuite/27_io/filesystem/path/io/dr2989.cc: Prune additional
errors from new constraints.
* testsuite/27_io/rvalue_streams-2.cc: Remove PR 80675 checks,
which are no longer expected to compile.
* testsuite/27_io/rvalue_streams.cc: Adjust existing test.
Verify LWG 1203 changes.

libstdc++: Use <sys/socket.h> features conditionally [PR 100285]

This makes the uses of getsockopt and setsockopt in
<experimental/socket> conditional on the availability of <sys/socket.h>.

It also fixes a test to check for <sys/socket.h> instead of <socket.h>.

libstdc++-v3/ChangeLog:

PR libstdc++/100285
* include/experimental/socket (__basic_socket_impl::set_option)
(__basic_socket_impl::get_option) [!_GLIBCXX_HAVE_SYS_SOCKET_H]:
Just set error code.
* testsuite/experimental/net/socket/socket_base.cc: CHeck
for <sys/socket.h> not <socket.h>.

libstdc++: Define effective-target for net::ip features [PR 100351]

Define a new effective-target keyword so that tests for the Networking
TS <experimental/internet> header can be skipped on targets where none
of it can be usefully defined.

libstdc++-v3/ChangeLog:

PR libstdc++/100180
PR libstdc++/100286
PR libstdc++/100351
* testsuite/experimental/net/internet/address/v4/comparisons.cc:
Use new effective-target keyword.
* testsuite/experimental/net/internet/address/v4/cons.cc:
Likewise.
* testsuite/experimental/net/internet/address/v4/creation.cc:
Likewise.
* testsuite/experimental/net/internet/address/v4/members.cc:
Likewise.
* testsuite/experimental/net/internet/address/v6/members.cc:
Likewise.
* testsuite/experimental/net/internet/resolver/base.cc:
Likewise.
* testsuite/experimental/net/internet/resolver/ops/lookup.cc:
Likewise.
* testsuite/experimental/net/internet/resolver/ops/reverse.cc:
Likewise.
* testsuite/experimental/net/internet/socket/opt.cc:
Likewise.
* testsuite/experimental/net/internet/tcp.cc:
Likewise.
* testsuite/experimental/net/internet/udp.cc:
Likewise.
* testsuite/lib/libstdc++.exp (check_effective_target_net_ts_ip):
New proc to check net_ts_ip et.

gcc/genflags.c: Improve error message

When an iterator cannot be expanded, it is helpful to see the expanded
name which is causing problems.  It would be better to also print the
current iterator value (which couldn't match), but I couldn't find
how.

2021-04-30  Christophe Lyon  <christophe.lyon@linaro.org>

gcc/
* genflags.c (gen_insn): Print failed expansion string.

c++/98032 - add testcase

This adds another testcase for PR95719.

2021-04-30  Richard Biener  <rguenther@suse.de>

PR c++/98032
* g++.dg/pr98032.C: New testcase.

Update alignment_for_piecewise_move

alignment_for_piecewise_move is called only with MOVE_MAX_PIECES or
STORE_MAX_PIECES, which are the number of bytes at a time that we
can move or store efficiently.  We should call mode_for_size without
limit to MAX_FIXED_MODE_SIZE, which is an integer expression for the
size in bits of the largest integer machine mode that should actually
be used, may be smaller than MOVE_MAX_PIECES or STORE_MAX_PIECES, which
may use vector.

* expr.c (alignment_for_piecewise_move): Call mode_for_size
without limit to MAX_FIXED_MODE_SIZE.

Don't use nullptr return from simplify_gen_subreg

Check nullptr return from simplify_gen_subreg.  Don't use it if it is
nullptr.

PR middle-end/90773
* builtins.c (builtin_memset_gen_str): Don't use return from
simplify_gen_subreg.

tree-optimization/96513 - add testcase for fixed bug

This adds a testcase for a bug that was fixed with the
hybrid SLP detection rewrite.

2021-04-30  Richard Biener  <rguenther@suse.de>

PR tree-optimization/96513
* gcc.dg/torture/pr96513.c: New testcase.

i386: Introduce reversed ADC and SBB patterns [PR98060]

The compiler is able to merge LTU comparisons with PLUS or MINUS pattern to
form addition with carry (ADC) and subtraction with borrow (SBB) instructions:

op = op + carry [ADC $0, op]
op = op - carry [SBB $0, op]

The patch introduces reversed ADC and SBB insn patterns:

op = op + !carry [SBB $-1, op]
op = op - !carry [ADC $-1, op]

allowing the compiler to also merge GEU comparisons.

2021-04-30  Uroš Bizjak  <ubizjak@gmail.com>

gcc/
PR target/98060
* config/i386/i386.md (*add<mode>3_carry_0r): New insn pattern.
(*addsi3_carry_zext_0r): Ditto.
(*sub<mode>3_carry_0): Ditto.
(*subsi3_carry_zext_0r): Ditto.
* config/i386/predicates.md (ix86_carry_flag_unset_operator):
New predicate.
* config/i386/i386.c (ix86_rtx_costs) <case PLUS, case MINUS>:
Also consider ix86_carry_flag_unset_operator to calculate
the cost of adc/sbb insn.

gcc/testsuite/

PR target/98060
* gcc.target/i386/pr98060.c: New test.

modulo-sched: skip loops with strange register defs [PR100225]

PR84878 fix adds an assertion which can fail, e.g. when stack pointer
is adjusted inside the loop.  We have to prevent it and search earlier
for any 'strange' instruction.  The solution is to skip the whole loop
if using 'note_stores' we found that one of hard registers is in
'df->regular_block_artificial_uses' set.

Also patch properly prohibit not single-set instruction in loop body.

gcc/ChangeLog:

PR rtl-optimization/100225
PR rtl-optimization/84878
* modulo-sched.c (sms_schedule): Use note_stores to skip loops
where we have an instruction which touches (writes) any hard
register from df->regular_block_artificial_uses set.
Allow not-single-set instruction only right before basic block
tail.

gcc/testsuite/ChangeLog:

PR rtl-optimization/100225
PR rtl-optimization/84878
* gcc.dg/pr100225.c: New test.

libgomp/ChangeLog:

* testsuite/libgomp.oacc-c-c++-common/atomic_capture-3.c: New test.

RISC-V: For '-march' and '-mabi' options, add 'Negative' property mentions itself.

When use multi-lib riscv-tool-chain. A bug is triggered when there are two
'-march' at command line.
riscv64-unknown-elf-gcc -march=rv32gcp -mabi=ilp32f -march=rv32gcpzp64 HelloWorld.c
/lhome/gengq/riscv64-linux-ptest/lib/gcc/riscv64-unknown-elf/10.2.0/../../../../riscv64-unknown-elf/bin/ld: /lhome/gengq/riscv64-linux-ptest/lib/gcc/riscv64-unknown-elf/10.2.0/../../../../riscv64-unknown-elf/lib/crt0.o: ABI is incompatible with that of the selected emulation:
  target emulation `elf64-littleriscv' does not match `elf32-littleriscv'
/lhome/gengq/riscv64-linux-ptest/lib/gcc/riscv64-unknown-elf/10.2.0/../../../../riscv64-unknown-elf/bin/ld: failed to merge target specific data of file /lhome/gengq/riscv64-linux-ptest/lib/gcc/riscv64-unknown-elf/10.2.0/../../../../riscv64-unknown-elf/lib/crt0.o
/lhome/gengq/riscv64-linux-ptest/lib/gcc/riscv64-unknown-elf/10.2.0/../../../../riscv64-unknown-elf/bin/ld: /lhome/gengq/riscv64-linux-ptest/lib/gcc/riscv64-unknown-elf/10.2.0/crtbegin.o: ABI is incompatible with that of the selected emulation:
  target emulation `elf64-littleriscv' does not match `elf32-littleriscv'
/lhome/gengq/riscv64-linux-ptest/lib/gcc/riscv64-unknown-elf/10.2.0/../../../../riscv64-unknown-elf/bin/ld: failed to merge target specific data of file /lhome/gengq/riscv64-linux-ptest/lib/gcc/riscv64-unknown-elf/10.2.0/crtbegin.o
......

This patch fix it. And the DRIVER would prune the extra '-march' and '-mabi'
options and keep only the last one valid.

gcc/ChangeLog:
* config/riscv/riscv.opt (march=,mabi=): Negative itself.

RISC-V: Add patterns for builtin overflow.

gcc/
* config/riscv/riscv.c (riscv_min_arithmetic_precision): New.
* config/riscv/riscv.h (TARGET_MIN_ARITHMETIC_PRECISION): New.
* config/riscv/riscv.md (addv<mode>4, uaddv<mode>4): New.
(subv<mode>4, usubv<mode>4, mulv<mode>4, umulv<mode>4): New.