libstdc++: Implement P1972R2 changes to std::variant (PR 95832)

G++ implements P1972R2 since r11-1597-0ca22d027ecc and so we no longer
need the P0608R3 special case to prevent narrowing conversions to bool.

Since non-GNU compilers don't necessarily implment P1972R2 yet, this
may cause a regression for those compilers. There is no feature-test
macro we can use to detect it though, so we'll have to live with it.

libstdc++-v3/ChangeLog:

PR libstdc++/95832
* include/std/variant (__detail::__variant::_Build_FUN): Remove
partial specialization to prevent narrowing conversions to bool.
* testsuite/20_util/variant/compile.cc: Test non-narrowing
conversions to bool.
* testsuite/20_util/variant/run.cc: Likewise.

libstdc++: Regenerate makefiles

libstdc++-v3/ChangeLog:

* doc/Makefile.in: Regenerate.
* include/Makefile.in: Regenerate.
* libsupc++/Makefile.in: Regenerate.
* po/Makefile.in: Regenerate.
* python/Makefile.in: Regenerate.
* src/Makefile.in: Regenerate.
* src/c++11/Makefile.in: Regenerate.
* src/c++17/Makefile.in: Regenerate.
* src/c++98/Makefile.in: Regenerate.
* src/filesystem/Makefile.in: Regenerate.
* testsuite/Makefile.in: Regenerate.

Add REVISION

gcc/
2020-06-23  Michael Meissner  <meissner@linux.ibm.com>

* REVISION: New file.

Handle AR_FULL vs. AR_FULL in dependency checking.

Previously, handling of full vs. full references failed to take
AR_FULL vs. AR_FULL into account.  A change in dependency
checking in gcc 10 created a code path that could lead there;
with this patch, this is now correctly handled.

gcc/fortran/ChangeLog:

2020-06-23  Thomas Koenig  <tkoenig@gcc.gnu.org>

PR fortran/95812
* dependency.c (ref_same_as_full_array): Handle case of AR_FULL
vs. AR_FULL.

gcc/testsuite/ChangeLog:

2020-06-23  Thomas Koenig  <tkoenig@gcc.gnu.org>

PR fortran/95812
* gfortran.dg/dependency_59.f90: New test.

Fortran  :  ICE in gfc_validate_kind PR95586

Report syntax error for invalid letter-spec in IMPLICIT statements
for derived types and not an ICE.

Original patch by Steve Kargl.  Added test cases based on those
provided by G. Steinmetz  in the PR.

2020-06-23  Steven G. Kargl  <kargl@gcc.gnu.org>

gcc/fortran/

PR fortran/95586
* decl.c (gfc_match_implicit): Only perform else branch if
the type spect is not BT_DERIVED.

2020-06-23  Mark Eggleston  <markeggleston@gcc.gnu.org>

gcc/testsuite/

PR fortran/95586
* gfortran.dg/pr95586_1.f90: New test.
* gfortran.dg/pr95586_2.f90: New test.

Daily bump.

build: Use -include instead of conditional include.

Automake and GNU Make both use the endif keyword, which conflicts and
elicits an error for matching if/ifdef and endif.

This patch changes the conditional include to use "-include" to prevent
a warning about a possible empty tmake_file.

libgomp/ChangeLog

2020-06-22  David Edelsohn  <dje.gcc@gmail.com>

* Makefile.am: Use -include.
* Makefile.in: Regenerate.

libatomic/ChangeLog

2020-06-22  David Edelsohn  <dje.gcc@gmail.com>

* Makefile.am: Use -include.
* Makefile.in: Regenerate.

libstdc++-v3/ChangeLog

2020-06-22  David Edelsohn  <dje.gcc@gmail.com>

* Makefile.am: Use -include.
* Makefile.in: Regenerate.

libgfortran/ChangeLog

2020-06-22  David Edelsohn  <dje.gcc@gmail.com>

* Makefile.am: Use -include.
* Makefile.in: Regenerate.

rs6000: Testsuite changes to go with the previous commit

The "sanity checker" thinks it knows better than maintainers, and there
is no override.

2020-06-22  Segher Boessenkool  <segher@kernel.crashing.org>

gcc/testsuite/ChangeLog:

* gcc.target/powerpc/cfuged-0.c: I protest.
* gcc.target/powerpc/cfuged-1.c: I protest.
* gcc.target/powerpc/clone3.c: I protest.
* gcc.target/powerpc/cntlzdm-0.c: I protest.
* gcc.target/powerpc/cntlzdm-1.c: I protest.
* gcc.target/powerpc/cnttzdm-0.c: I protest.
* gcc.target/powerpc/cnttzdm-1.c: I protest.
* gcc.target/powerpc/cpu-future.c: I protest.
* gcc.target/powerpc/dg-future-0.c: I protest.
* gcc.target/powerpc/dg-future-1.c: I protest.
* gcc.target/powerpc/localentry-1.c: I protest.
* gcc.target/powerpc/localentry-detect-1.c: I protest.
* gcc.target/powerpc/mma-builtin-1.c: I protest.
* gcc.target/powerpc/mma-builtin-2.c: I protest.
* gcc.target/powerpc/mma-builtin-3.c: I protest.
* gcc.target/powerpc/mma-builtin-4.c: I protest.
* gcc.target/powerpc/mma-builtin-5.c: I protest.
* gcc.target/powerpc/mma-builtin-6.c: I protest.
* gcc.target/powerpc/notoc-direct-1.c: I protest.
* gcc.target/powerpc/pcrel-sibcall-1.c: I protest.
* gcc.target/powerpc/pdep-0.c: I protest.
* gcc.target/powerpc/pdep-1.c: I protest.
* gcc.target/powerpc/pextd-0.c: I protest.
* gcc.target/powerpc/pextd-1.c: I protest.
* gcc.target/powerpc/pr93122.c: I protest.
* gcc.target/powerpc/pr94740.c: I protest.
* gcc.target/powerpc/setbceq.c: I protest.
* gcc.target/powerpc/setbcge.c: I protest.
* gcc.target/powerpc/setbcgt.c: I protest.
* gcc.target/powerpc/setbcle.c: I protest.
* gcc.target/powerpc/setbclt.c: I protest.
* gcc.target/powerpc/setbcne.c: I protest.
* gcc.target/powerpc/setnbceq.c: I protest.
* gcc.target/powerpc/setnbcge.c: I protest.
* gcc.target/powerpc/setnbcgt.c: I protest.
* gcc.target/powerpc/setnbcle.c: I protest.
* gcc.target/powerpc/setnbclt.c: I protest.
* gcc.target/powerpc/setnbcne.c: I protest.
* gcc.target/powerpc/vec-cfuged-0.c: I protest.
* gcc.target/powerpc/vec-cfuged-1.c: I protest.
* gcc.target/powerpc/vec-clrl-0.c: I protest.
* gcc.target/powerpc/vec-clrl-1.c: I protest.
* gcc.target/powerpc/vec-clrl-2.c: I protest.
* gcc.target/powerpc/vec-clrl-3.c: I protest.
* gcc.target/powerpc/vec-clrr-0.c: I protest.
* gcc.target/powerpc/vec-clrr-1.c: I protest.
* gcc.target/powerpc/vec-clrr-2.c: I protest.
* gcc.target/powerpc/vec-clrr-3.c: I protest.
* gcc.target/powerpc/vec-cntlzm-0.c: I protest.
* gcc.target/powerpc/vec-cntlzm-1.c: I protest.
* gcc.target/powerpc/vec-cnttzm-0.c: I protest.
* gcc.target/powerpc/vec-cnttzm-1.c: I protest.
* gcc.target/powerpc/vec-extracth-0.c: I protest.
* gcc.target/powerpc/vec-extracth-1.c: I protest.
* gcc.target/powerpc/vec-extracth-2.c: I protest.
* gcc.target/powerpc/vec-extracth-3.c: I protest.
* gcc.target/powerpc/vec-extracth-4.c: I protest.
* gcc.target/powerpc/vec-extracth-5.c: I protest.
* gcc.target/powerpc/vec-extracth-6.c: I protest.
* gcc.target/powerpc/vec-extracth-7.c: I protest.
* gcc.target/powerpc/vec-extracth-be-0.c: I protest.
* gcc.target/powerpc/vec-extracth-be-1.c: I protest.
* gcc.target/powerpc/vec-extracth-be-2.c: I protest.
* gcc.target/powerpc/vec-extracth-be-3.c: I protest.
* gcc.target/powerpc/vec-extractl-0.c: I protest.
* gcc.target/powerpc/vec-extractl-1.c: I protest.
* gcc.target/powerpc/vec-extractl-2.c: I protest.
* gcc.target/powerpc/vec-extractl-3.c: I protest.
* gcc.target/powerpc/vec-extractl-4.c: I protest.
* gcc.target/powerpc/vec-extractl-5.c: I protest.
* gcc.target/powerpc/vec-extractl-6.c: I protest.
* gcc.target/powerpc/vec-extractl-7.c: I protest.
* gcc.target/powerpc/vec-extractl-be-0.c: I protest.
* gcc.target/powerpc/vec-extractl-be-1.c: I protest.
* gcc.target/powerpc/vec-extractl-be-2.c: I protest.
* gcc.target/powerpc/vec-extractl-be-3.c: I protest.
* gcc.target/powerpc/vec-gnb-0.c: I protest.
* gcc.target/powerpc/vec-gnb-1.c: I protest.
* gcc.target/powerpc/vec-gnb-2.c: I protest.
* gcc.target/powerpc/vec-pdep-0.c: I protest.
* gcc.target/powerpc/vec-pdep-1.c: I protest.
* gcc.target/powerpc/vec-pext-0.c: I protest.
* gcc.target/powerpc/vec-pext-1.c: I protest.
* gcc.target/powerpc/vec-stril-0.c: I protest.
* gcc.target/powerpc/vec-stril-1.c: I protest.
* gcc.target/powerpc/vec-stril-10.c: I protest.
* gcc.target/powerpc/vec-stril-11.c: I protest.
* gcc.target/powerpc/vec-stril-12.c: I protest.
* gcc.target/powerpc/vec-stril-13.c: I protest.
* gcc.target/powerpc/vec-stril-14.c: I protest.
* gcc.target/powerpc/vec-stril-15.c: I protest.
* gcc.target/powerpc/vec-stril-16.c: I protest.
* gcc.target/powerpc/vec-stril-17.c: I protest.
* gcc.target/powerpc/vec-stril-18.c: I protest.
* gcc.target/powerpc/vec-stril-19.c: I protest.
* gcc.target/powerpc/vec-stril-2.c: I protest.
* gcc.target/powerpc/vec-stril-20.c: I protest.
* gcc.target/powerpc/vec-stril-21.c: I protest.
* gcc.target/powerpc/vec-stril-22.c: I protest.
* gcc.target/powerpc/vec-stril-23.c: I protest.
* gcc.target/powerpc/vec-stril-3.c: I protest.
* gcc.target/powerpc/vec-stril-4.c: I protest.
* gcc.target/powerpc/vec-stril-5.c: I protest.
* gcc.target/powerpc/vec-stril-6.c: I protest.
* gcc.target/powerpc/vec-stril-7.c: I protest.
* gcc.target/powerpc/vec-stril-8.c: I protest.
* gcc.target/powerpc/vec-stril-9.c: I protest.
* gcc.target/powerpc/vec-stril_p-0.c: I protest.
* gcc.target/powerpc/vec-stril_p-1.c: I protest.
* gcc.target/powerpc/vec-stril_p-10.c: I protest.
* gcc.target/powerpc/vec-stril_p-11.c: I protest.
* gcc.target/powerpc/vec-stril_p-2.c: I protest.
* gcc.target/powerpc/vec-stril_p-3.c: I protest.
* gcc.target/powerpc/vec-stril_p-4.c: I protest.
* gcc.target/powerpc/vec-stril_p-5.c: I protest.
* gcc.target/powerpc/vec-stril_p-6.c: I protest.
* gcc.target/powerpc/vec-stril_p-7.c: I protest.
* gcc.target/powerpc/vec-stril_p-8.c: I protest.
* gcc.target/powerpc/vec-stril_p-9.c: I protest.
* gcc.target/powerpc/vec-strir-0.c: I protest.
* gcc.target/powerpc/vec-strir-1.c: I protest.
* gcc.target/powerpc/vec-strir-10.c: I protest.
* gcc.target/powerpc/vec-strir-11.c: I protest.
* gcc.target/powerpc/vec-strir-12.c: I protest.
* gcc.target/powerpc/vec-strir-13.c: I protest.
* gcc.target/powerpc/vec-strir-14.c: I protest.
* gcc.target/powerpc/vec-strir-15.c: I protest.
* gcc.target/powerpc/vec-strir-16.c: I protest.
* gcc.target/powerpc/vec-strir-17.c: I protest.
* gcc.target/powerpc/vec-strir-18.c: I protest.
* gcc.target/powerpc/vec-strir-19.c: I protest.
* gcc.target/powerpc/vec-strir-2.c: I protest.
* gcc.target/powerpc/vec-strir-20.c: I protest.
* gcc.target/powerpc/vec-strir-21.c: I protest.
* gcc.target/powerpc/vec-strir-22.c: I protest.
* gcc.target/powerpc/vec-strir-23.c: I protest.
* gcc.target/powerpc/vec-strir-3.c: I protest.
* gcc.target/powerpc/vec-strir-4.c: I protest.
* gcc.target/powerpc/vec-strir-5.c: I protest.
* gcc.target/powerpc/vec-strir-6.c: I protest.
* gcc.target/powerpc/vec-strir-7.c: I protest.
* gcc.target/powerpc/vec-strir-8.c: I protest.
* gcc.target/powerpc/vec-strir-9.c: I protest.
* gcc.target/powerpc/vec-strir_p-0.c: I protest.
* gcc.target/powerpc/vec-strir_p-1.c: I protest.
* gcc.target/powerpc/vec-strir_p-10.c: I protest.
* gcc.target/powerpc/vec-strir_p-11.c: I protest.
* gcc.target/powerpc/vec-strir_p-2.c: I protest.
* gcc.target/powerpc/vec-strir_p-3.c: I protest.
* gcc.target/powerpc/vec-strir_p-4.c: I protest.
* gcc.target/powerpc/vec-strir_p-5.c: I protest.
* gcc.target/powerpc/vec-strir_p-6.c: I protest.
* gcc.target/powerpc/vec-strir_p-7.c: I protest.
* gcc.target/powerpc/vec-strir_p-8.c: I protest.
* gcc.target/powerpc/vec-strir_p-9.c: I protest.
* gcc.target/powerpc/vec-ternarylogic-0.c: I protest.
* gcc.target/powerpc/vec-ternarylogic-1.c: I protest.
* gcc.target/powerpc/vec-ternarylogic-10.c: I protest.
* gcc.target/powerpc/vec-ternarylogic-2.c: I protest.
* gcc.target/powerpc/vec-ternarylogic-3.c: I protest.
* gcc.target/powerpc/vec-ternarylogic-4.c: I protest.
* gcc.target/powerpc/vec-ternarylogic-5.c: I protest.
* gcc.target/powerpc/vec-ternarylogic-6.c: I protest.
* gcc.target/powerpc/vec-ternarylogic-7.c: I protest.
* gcc.target/powerpc/vec-ternarylogic-8.c: I protest.
* gcc.target/powerpc/vec-ternarylogic-9.c: I protest.
* gcc.target/powerpc/xxgenpc-runnable.c: I protest.
* lib/target-supports.exp: Stuff.

rs6000: Rename future to power10

This renames the command line options, the internal names, and mentions
in the comments, from "future" to "power10".  Also, the file "future.md"
is renamed.

The predefined user macro _ARCH_PWR_FUTURE is renamed to _ARCH_PWR10.

"Future architecture" is renamed to "ISA 3.1".

2020-06-22  Segher Boessenkool  <segher@kernel.crashing.org>

gcc/ChangeLog:

* config/rs6000/altivec.h: Use _ARCH_PWR10, not _ARCH_PWR_FUTURE.
Update comment for ISA 3.1.
* config/rs6000/altivec.md: Use TARGET_POWER10, not TARGET_FUTURE.
* config/rs6000/driver-rs6000.c (asm_names): Use -mpwr10 for power10
on AIX, and -mpower10 elsewhere.
* config/rs6000/future.md: Delete.
* config/rs6000/linux64.h: Update comments.  Use TARGET_POWER10, not
TARGET_FUTURE.
* config/rs6000/power10.md: New file.
* config/rs6000/ppc-auxv.h: Use PPC_PLATFORM_POWER10, not
PPC_PLATFORM_FUTURE.
* config/rs6000/rs6000-builtin.def: Update comments.  Use BU_P10V_*
names instead of BU_FUTURE_V_* names.  Use RS6000_BTM_P10 instead of
RS6000_BTM_FUTURE.  Use P10_BUILTIN_* instead of FUTURE_BUILTIN_*.
Use BU_P10_* instead of BU_FUTURE_*.
* config/rs6000/rs6000-c.c (rs6000_target_modify_macros): Define
_ARCH_PWR10 instead of _ARCH_PWR_FUTURE.
(altivec_resolve_overloaded_builtin): Use P10_BUILTIN_VEC_XXEVAL, not
FUTURE_BUILTIN_VEC_XXEVAL.
* config/rs6000/rs6000-call.c: Use P10_BUILTIN_*, not FUTURE_BUILTIN_*.
Update compiler messages.
* config/rs6000/rs6000-cpus.def: Update comments.  Use ISA_3_1_*, not
ISA_FUTURE_*.  Use OPTION_MASK_POWER10, not OPTION_MASK_FUTURE.
* config/rs6000/rs6000-opts.h: Use PROCESSOR_POWER10, not
PROCESSOR_FUTURE.
* config/rs6000/rs6000-string.c: Ditto.
* config/rs6000/rs6000-tables.opt (rs6000_cpu_opt_value): Use "power10"
instead of "future", reorder it to right after "power9".
* config/rs6000/rs6000.c: Update comments.  Use OPTION_MASK_POWER10,
not OPTION_MASK_FUTURE.  Use TARGET_POWER10, not TARGET_FUTURE.  Use
RS6000_BTM_P10, not RS6000_BTM_FUTURE.  Update compiler messages.
Use PROCESSOR_POWER10, not PROCESSOR_FUTURE.  Use ISA_3_1_MASKS_SERVER,
not ISA_FUTURE_MASKS_SERVER.
(rs6000_opt_masks): Use "power10" instead of "future".
(rs6000_builtin_mask_names): Ditto.
(rs6000_disable_incompatible_switches): Ditto.
* config/rs6000/rs6000.h: Use -mpower10, not -mfuture.  Use
-mcpu=power10, not -mcpu=future.  Use MASK_POWER10, not MASK_FUTURE.
Use OPTION_MASK_POWER10, not OPTION_MASK_FUTURE.  Use RS6000_BTM_P10,
not RS6000_BTM_FUTURE.
* config/rs6000/rs6000.md: Use "power10", not "future".  Use
TARGET_POWER10, not TARGET_FUTURE.  Include "power10.md", not
"future.md".
* config/rs6000/rs6000.opt (mfuture): Delete.
(mpower10): New.
* config/rs6000/t-rs6000: Use "power10.md", not "future.md".
* config/rs6000/vsx.md: Use TARGET_POWER10, not TARGET_FUTURE.

Update gcc sv.po.

* sv.po: Update.

recog: Restore builds with Clang

Using parameter packs with function typedefs tripped a Clang bug
in which the packs were not being expanded correctly:

  https://bugs.llvm.org/show_bug.cgi?id=46377

Work around that by going back to the decltype approach, but adding
a cast to void to suppress a warning about unused values.

2020-06-22  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
* coretypes.h (first_type): Delete.
* recog.h (insn_gen_fn::operator()): Go back to using a decltype.

arm: Fix the failing mve scalar shift execution tests.

In GCC testsuite the MVE scalar shift execution tests (mve_scalar_shifts[1-4].c) are failings
because of executing them on target hardware which doesn't support MVE instructions. This patch
restricts those tests to execute only on target hardware that support MVE instructions.

2020-06-22  Srinath Parvathaneni  <srinath.parvathaneni@arm.com>

gcc/
* doc/sourcebuild.texi (arm_v8_1m_mve_fp_ok): Add item.
(arm_mve_hw): Likewise.

gcc/testsuite/
* gcc.target/arm/mve/intrinsics/mve_scalar_shifts1.c: Modify.
* gcc.target/arm/mve/intrinsics/mve_scalar_shifts2.c: Likewise.
* gcc.target/arm/mve/intrinsics/mve_scalar_shifts3.c: Likewise.
* gcc.target/arm/mve/intrinsics/mve_scalar_shifts4.c: Likewise.
* lib/target-supports.exp (check_effective_target_arm_mve_hw): Define.

Fortran  : ICE in resolve_fl_procedure PR95708

Now issues an error "Intrinsic procedure 'num_images' not
allowed in PROCEDURE" instead of an ICE.

2020-06-22  Steven G. Kargl  <kargl@gcc.gnu.org>

gcc/fortran/

PR fortran/95708
* intrinsic.c (add_functions): Replace CLASS_INQUIRY with
CLASS_TRANSFORMATIONAL for intrinsic num_images.
(make_generic): Replace ACTUAL_NO with ACTUAL_YES for
intrinsic team_number.
* resolve.c (resolve_fl_procedure): Check pointer ts.u.derived
exists before using it.

2020-06-22  Mark Eggleston  <markeggleston@gcc.gnu.org>

gcc/testsuite/

PR fortran/95708
* gfortran.dg/pr95708.f90: New test.

x86: Skip EXT_REX_SSE_REG_P for vzeroupper optimization

Skip EXT_REX_SSE_REG_P for vzeroupper optimization since upper 16 vector
registers don't trigger SSE <-> AVX transition penalty.

gcc/

PR target/95791
* config/i386/i386.c (ix86_dirflag_mode_needed): Skip
EXT_REX_SSE_REG_P.

gcc/testsuite/

PR target/95791
* gcc.target/i386/pr95791.c: New test.

Fortran  : ICE in gfc_check_reshape PR95585

Issue an error where an array is used before its definition
instead of an ICE.

2020-06-22  Steven G. Kargl  <kargl@gcc.gnu.org>

gcc/fortran/

PR fortran/95585
* check.c (gfc_check_reshape): Add check for a value when
the symbol has an attribute flavor FL_PARAMETER.

2020-06-22  Mark Eggleston  <markeggleston@gcc.gnu.org>

gcc/testsuite/

PR fortran/95585
* gfortran.dg/pr95585.f90: New test.

Fortran  : Missing gcc-internal-format PR42693

Messages in gfc_arith_error contain gcc internal format specifiers
which should be enclosed in G_() in order to be correctly translated.

2020-06-22  Mark Eggleston  <markeggleston@gcc.gnu.org>

gcc/fortran/

PR fortran/42693
* arith.c (gfc_arith_error): Enclose strings in G_() instead
of _().

tree-optimization/95770 - fix SLP vectorized stmt placement compute

This fixes the vectorized stmt placement compute for the case of
external defs.

2020-06-22  Richard Biener  <rguenther@suse.de>

PR tree-optimization/95770
* tree-vect-slp.c (vect_schedule_slp_instance): Also consider
external defs.

* gcc.dg/pr95770.c: New testcase.

amdgcn: Pass vector parameters in memory

gcc/ChangeLog:

* config/gcn/gcn.c (gcn_function_arg): Disallow vector arguments.
(gcn_return_in_memory): Return vectors in memory.

openmp: Compute triangular loop number of iterations at compile time

2020-06-22  Jakub Jelinek  <jakub@redhat.com>

* omp-general.c (omp_extract_for_data): For triangular loops with
all loop invariant expressions constant where the innermost loop is
executed at least once compute number of iterations at compile time.

RISC-V: Normalize arch string in driver time

 - Normalize arch string would help the multi-lib handling, e.g. rv64gc and
   rv64g_c are both valid and same arch, but latter one would confuse
   the detection of multi-lib, earlier normalize can resolve this issue.

gcc/ChangeLog:

* config/riscv/riscv.h (ASM_SPEC): Remove riscv_expand_arch call.
(DRIVER_SELF_SPECS): New.

RISC-V: Fix compilation failed for frflags builtin in C++ mode

  - g++ will complain too few arguments for frflags builtin like bellow
    message:

    error: too few arguments to function 'unsigned int __builtin_riscv_frflags(void)'

  - However it's no arguments needed, it because we declare the function
    type with VOID arguments, that seems like require a VOID argument
    in the c++ front-end when GCC tried to resolve the function.

gcc/ChangeLog

* config/riscv/riscv-builtins.c (RISCV_FTYPE_NAME0): New.
(RISCV_FTYPE_ATYPES0): New.
(riscv_builtins): Using RISCV_USI_FTYPE for frflags.
* config/riscv/riscv-ftypes.def: Remove VOID argument.

gcc/testsuite/ChangeLog

* g++.target/riscv/frflags.C: New.

Daily bump.

aix: Add GCC64 configuration and FAT target libraries.

This patch adds the ability to configure GCC on AIX to build as a
64 bit application and to build target libraries "FAT" libraries in both
32 bit and 64 bit mode.

The patch adds makefile fragment hooks to target libraries that allows
them to include target-specific rules.  The target specific rules for
AIX place both 32 bit and 64 bit objects and shared objects
in archives at the top-level, not multilib subdirectories.  The
multilibs are built in subdirectories, but must be combined during the
last parts of the target library build process.  Because of the way
that GCC bootstrap works, the libraries must be combined during the
multiple stages of GCC bootstrap, not solely when installed in the
final destination, so the libraries are correct at the end of
each target library build stage, not solely an install recipe.

gcc/ChangeLog

2020-06-21  David Edelsohn  <dje.gcc@gmail.com>

* config.gcc: Use t-aix64, biarch64 and default64 for cpu_is_64bit.
* config/rs6000/aix72.h (ASM_SPEC): Remove aix64 option.
(ASM_SPEC32): New.
(ASM_SPEC64): New.
(ASM_CPU_SPEC): Remove vsx and altivec options.
(CPP_SPEC_COMMON): Rename from CPP_SPEC.
(CPP_SPEC32): New.
(CPP_SPEC64): New.
(CPLUSPLUS_CPP_SPEC): Rename to CPLUSPLUS_CPP_SPEC_COMMON..
(TARGET_DEFAULT): Only define if not BIARCH.
(LIB_SPEC_COMMON): Rename from LIB_SPEC.
(LIB_SPEC32): New.
(LIB_SPEC64): New.
(LINK_SPEC_COMMON): Rename from LINK_SPEC.
(LINK_SPEC32): New.
(LINK_SPEC64): New.
(STARTFILE_SPEC): Add 64 bit version of crtcxa and crtdbase.
(ASM_SPEC): Define 32 and 64 bit alternatives using DEFAULT_ARCH64_P.
(CPP_SPEC): Same.
(CPLUSPLUS_CPP_SPEC): Same.
(LIB_SPEC): Same.
(LINK_SPEC): Same.
(SUBTARGET_EXTRA_SPECS): Add new 32/64 specs.
* config/rs6000/defaultaix64.h: New file.
* config/rs6000/t-aix64: New file.

libgcc/ChangeLog

2020-06-21  David Edelsohn  <dje.gcc@gmail.com>

* config.host (extra_parts): Add crtcxa_64 and crtdbase_64.
* config/rs6000/t-aix-cxa: Explicitly compile 32 bit with -maix32
and 64 bit with -maix64.
* config/rs6000/t-slibgcc-aix: Remove extra @multilib_dir@ level.
Build and install AIX-style FAT libraries.

libgomp/ChangeLog

2020-06-21  David Edelsohn  <dje.gcc@gmail.com>

* Makefile.am (tmake_file): Build and install AIX-style FAT libraries.
* Makefile.in: Regenerate
* configure.ac (tmake_file): Substitute.
* configure: Regenerate.
* configure.tgt (powerpc-ibm-aix*): Define tmake_file.
* config/t-aix: New file.

libstdc++-v3/ChangeLog

2020-06-21  David Edelsohn  <dje.gcc@gmail.com>

* Makefile.am (tmake_file): Build and install AIX-style FAT libraries.
* Makefile.in: Regenerate.
* configure.ac (tmake_file): Substitute.
* configure: Regenerate.
* configure.host (aix*): Define tmake_file.
* config/os/aix/t-aix: New file.

libatomic/ChangeLog

2020-06-21  David Edelsohn  <dje.gcc@gmail.com>

* Makefile.am (tmake_file): Build and install AIX-style FAT libraries.
* Makefile.in: Regenerate.
* configure.ac (tmake_file): Substitute.
* configure: Regenerate.
* configure.tgt (powerpc-ibm-aix*): Define tmake_file.
* config/t-aix: New file.

libgfortran/ChangeLog

2020-06-21  David Edelsohn  <dje.gcc@gmail.com>

* Makefile.am (tmake_file): Build and install AIX-style FAT libraries.
* Makefile.in: Regenerate.
* configure.ac (tmake_file): Substitute.
* configure: Regenerate.
* configure.host: Add system configury stanza. Define tmake_file.
* config/t-aix: New file.

rs6000: Add MMA built-in function definitions and test cases.

Add the Matrix-Multiply Assist (MMA) built-ins.  The MMA accumulators are
INOUT operands for most MMA instructions, but they are also very expensive
to move around.  For this reason, we have implemented a built-in API where
the accumulators are passed using pass-by-reference/pointers, so the user
won't use one accumulator as input and another as output, which wouldentail
a lot of copies.  However, using pointers gives us poor code generation
when we expand the built-ins at normal expand time.  We therefore expand
the MMA built-ins early into gimple, converting the pass-by-reference calls
to an internal built-in that uses pass-by-value calling convention, where
we can enforce the input and output accumulators are the same.  This gives
us much better code generation.

2020-06-20  Peter Bergner  <bergner@linux.ibm.com>

gcc/
* config/rs6000/predicates.md (mma_assemble_input_operand): New.
* config/rs6000/rs6000-builtin.def (BU_MMA_1, BU_MMA_V2, BU_MMA_3,
BU_MMA_5, BU_MMA_6, BU_VSX_1): Add support macros for defining MMA
built-in functions.
(ASSEMBLE_ACC, ASSEMBLE_PAIR, DISASSEMBLE_ACC, DISASSEMBLE_PAIR,
PMXVBF16GER2, PMXVBF16GER2NN, PMXVBF16GER2NP, PMXVBF16GER2PN,
PMXVBF16GER2PP, PMXVF16GER2, PMXVF16GER2NN, PMXVF16GER2NP,
PMXVF16GER2PN, PMXVF16GER2PP, PMXVF32GER, PMXVF32GERNN,
PMXVF32GERNP, PMXVF32GERPN, PMXVF32GERPP, PMXVF64GER, PMXVF64GERNN,
PMXVF64GERNP, PMXVF64GERPN, PMXVF64GERPP, PMXVI16GER2, PMXVI16GER2PP,
PMXVI16GER2S, PMXVI16GER2SPP, PMXVI4GER8, PMXVI4GER8PP, PMXVI8GER4,
PMXVI8GER4PP, PMXVI8GER4SPP, XVBF16GER2, XVBF16GER2NN, XVBF16GER2NP,
XVBF16GER2PN, XVBF16GER2PP, XVCVBF16SP, XVCVSPBF16, XVF16GER2,
XVF16GER2NN, XVF16GER2NP, XVF16GER2PN, XVF16GER2PP, XVF32GER,
XVF32GERNN, XVF32GERNP, XVF32GERPN, XVF32GERPP, XVF64GER, XVF64GERNN,
XVF64GERNP, XVF64GERPN, XVF64GERPP, XVI16GER2, XVI16GER2PP, XVI16GER2S,
XVI16GER2SPP, XVI4GER8, XVI4GER8PP, XVI8GER4, XVI8GER4PP, XVI8GER4SPP,
XXMFACC, XXMTACC, XXSETACCZ): Add MMA built-ins.
* config/rs6000/rs6000.c (rs6000_emit_move): Use CONST_INT_P.
Allow zero constants.
(print_operand) <case 'A'>: New output modifier.
(rs6000_split_multireg_move): Add support for inserting accumulator
priming and depriming instructions.  Add support for splitting an
assemble accumulator pattern.
* config/rs6000/rs6000-call.c (mma_init_builtins, mma_expand_builtin,
rs6000_gimple_fold_mma_builtin): New functions.
(RS6000_BUILTIN_M): New macro.
(def_builtin): Handle RS6000_BTC_QUAD and RS6000_BTC_PAIR attributes.
(bdesc_mma): Add new MMA built-in support.
(htm_expand_builtin): Use RS6000_BTC_OPND_MASK.
(rs6000_invalid_builtin): Add handling of RS6000_BTM_FUTURE and
RS6000_BTM_MMA.
(rs6000_builtin_valid_without_lhs): Handle RS6000_BTC_VOID attribute.
(rs6000_gimple_fold_builtin): Call rs6000_builtin_is_supported_p
and rs6000_gimple_fold_mma_builtin.
(rs6000_expand_builtin): Call mma_expand_builtin.
Use RS6000_BTC_OPND_MASK.
(rs6000_init_builtins): Adjust comment.  Call mma_init_builtins.
(htm_init_builtins): Use RS6000_BTC_OPND_MASK.
(builtin_function_type): Handle VSX_BUILTIN_XVCVSPBF16 and
VSX_BUILTIN_XVCVBF16SP.
* config/rs6000/rs6000.h (RS6000_BTC_QUINARY, RS6000_BTC_SENARY,
RS6000_BTC_OPND_MASK, RS6000_BTC_QUAD, RS6000_BTC_PAIR,
RS6000_BTC_QUADPAIR, RS6000_BTC_GIMPLE): New defines.
(RS6000_BTC_PREDICATE, RS6000_BTC_ABS, RS6000_BTC_DST,
RS6000_BTC_TYPE_MASK, RS6000_BTC_ATTR_MASK): Adjust values.
* config/rs6000/mma.md (MAX_MMA_OPERANDS): New define_constant.
(UNSPEC_MMA_ASSEMBLE_ACC, UNSPEC_MMA_PMXVBF16GER2,
UNSPEC_MMA_PMXVBF16GER2NN, UNSPEC_MMA_PMXVBF16GER2NP,
UNSPEC_MMA_PMXVBF16GER2PN, UNSPEC_MMA_PMXVBF16GER2PP,
UNSPEC_MMA_PMXVF16GER2, UNSPEC_MMA_PMXVF16GER2NN,
UNSPEC_MMA_PMXVF16GER2NP, UNSPEC_MMA_PMXVF16GER2PN,
UNSPEC_MMA_PMXVF16GER2PP, UNSPEC_MMA_PMXVF32GER,
UNSPEC_MMA_PMXVF32GERNN, UNSPEC_MMA_PMXVF32GERNP,
UNSPEC_MMA_PMXVF32GERPN, UNSPEC_MMA_PMXVF32GERPP,
UNSPEC_MMA_PMXVF64GER, UNSPEC_MMA_PMXVF64GERNN,
UNSPEC_MMA_PMXVF64GERNP, UNSPEC_MMA_PMXVF64GERPN,
UNSPEC_MMA_PMXVF64GERPP, UNSPEC_MMA_PMXVI16GER2,
UNSPEC_MMA_PMXVI16GER2PP, UNSPEC_MMA_PMXVI16GER2S,
UNSPEC_MMA_PMXVI16GER2SPP, UNSPEC_MMA_PMXVI4GER8,
UNSPEC_MMA_PMXVI4GER8PP, UNSPEC_MMA_PMXVI8GER4,
UNSPEC_MMA_PMXVI8GER4PP, UNSPEC_MMA_PMXVI8GER4SPP,
UNSPEC_MMA_XVBF16GER2, UNSPEC_MMA_XVBF16GER2NN,
UNSPEC_MMA_XVBF16GER2NP, UNSPEC_MMA_XVBF16GER2PN,
UNSPEC_MMA_XVBF16GER2PP, UNSPEC_MMA_XVF16GER2, UNSPEC_MMA_XVF16GER2NN,
UNSPEC_MMA_XVF16GER2NP, UNSPEC_MMA_XVF16GER2PN, UNSPEC_MMA_XVF16GER2PP,
UNSPEC_MMA_XVF32GER, UNSPEC_MMA_XVF32GERNN, UNSPEC_MMA_XVF32GERNP,
UNSPEC_MMA_XVF32GERPN, UNSPEC_MMA_XVF32GERPP, UNSPEC_MMA_XVF64GER,
UNSPEC_MMA_XVF64GERNN, UNSPEC_MMA_XVF64GERNP, UNSPEC_MMA_XVF64GERPN,
UNSPEC_MMA_XVF64GERPP, UNSPEC_MMA_XVI16GER2, UNSPEC_MMA_XVI16GER2PP,
UNSPEC_MMA_XVI16GER2S, UNSPEC_MMA_XVI16GER2SPP, UNSPEC_MMA_XVI4GER8,
UNSPEC_MMA_XVI4GER8PP, UNSPEC_MMA_XVI8GER4, UNSPEC_MMA_XVI8GER4PP,
UNSPEC_MMA_XVI8GER4SPP, UNSPEC_MMA_XXMFACC, UNSPEC_MMA_XXMTACC): New.
(MMA_ACC, MMA_VV, MMA_AVV, MMA_PV, MMA_APV, MMA_VVI4I4I8,
MMA_AVVI4I4I8, MMA_VVI4I4I2, MMA_AVVI4I4I2, MMA_VVI4I4,
MMA_AVVI4I4, MMA_PVI4I2, MMA_APVI4I2, MMA_VVI4I4I4,
MMA_AVVI4I4I4): New define_int_iterator.
(acc, vv, avv, pv, apv, vvi4i4i8, avvi4i4i8, vvi4i4i2,
avvi4i4i2, vvi4i4, avvi4i4, pvi4i2, apvi4i2, vvi4i4i4,
avvi4i4i4): New define_int_attr.
(*movpxi): Add zero constant alternative.
(mma_assemble_pair, mma_assemble_acc): New define_expand.
(*mma_assemble_acc): New define_insn_and_split.
(mma_<acc>, mma_xxsetaccz, mma_<vv>, mma_<avv>, mma_<pv>, mma_<apv>,
mma_<vvi4i4i8>, mma_<avvi4i4i8>, mma_<vvi4i4i2>, mma_<avvi4i4i2>,
mma_<vvi4i4>, mma_<avvi4i4>, mma_<pvi4i2>, mma_<apvi4i2>,
mma_<vvi4i4i4>, mma_<avvi4i4i4>): New define_insn.
* config/rs6000/rs6000.md (define_attr "type"): New type mma.
* config/rs6000/vsx.md (UNSPEC_VSX_XVCVBF16SP): New.
(UNSPEC_VSX_XVCVSPBF16): Likewise.
(XVCVBF16): New define_int_iterator.
(xvcvbf16): New define_int_attr.
(vsx_<xvcvbf16>): New define_insn.
* doc/extend.texi: Document the mma built-ins.

rs6000: Add base support and types for defining MMA built-ins.

Add the new -mmma option as well as the initial MMA support, which includes
the target specific __vector_pair and __vector_quad types, the POImode and
PXImode partial integer modes they are mapped to, and their associated
move patterns.  Support for the restrictions on the registers these modes
can be assigned to as also been added.

2020-06-20  Peter Bergner  <bergner@linux.ibm.com>
    Michael Meissner  <meissner@linux.ibm.com>

gcc/
* config/rs6000/mma.md: New file.
* config/rs6000/rs6000-c.c (rs6000_target_modify_macros): Define
__MMA__ for mma.
* config/rs6000/rs6000-call.c (rs6000_init_builtins): Add support
for __vector_pair and __vector_quad types.
* config/rs6000/rs6000-cpus.def (OTHER_FUTURE_MASKS): Add
OPTION_MASK_MMA.
(POWERPC_MASKS): Likewise.
* config/rs6000/rs6000-modes.def (OI, XI): New integer modes.
(POI, PXI): New partial integer modes.
* config/rs6000/rs6000.c (TARGET_INVALID_CONVERSION): Define.
(rs6000_hard_regno_nregs_internal): Use VECTOR_ALIGNMENT_P.
(rs6000_hard_regno_mode_ok_uncached): Likewise.
Add support for POImode being allowed in VSX registers and PXImode
being allowed in FP registers.
(rs6000_modes_tieable_p): Adjust comment.
Add support for POImode and PXImode.
(rs6000_debug_reg_global) <print_tieable_modes>: Add OImode, POImode
XImode, PXImode, V2SImode, V2SFmode and CCFPmode..
(rs6000_setup_reg_addr_masks): Use VECTOR_ALIGNMENT_P.
Set up appropriate addr_masks for vector pair and vector quad addresses.
(rs6000_init_hard_regno_mode_ok): Add support for vector pair and
vector quad registers.  Setup reload handlers for POImode and PXImode.
(rs6000_builtin_mask_calculate): Add support for RS6000_BTM_MMA.
(rs6000_option_override_internal): Error if -mmma is specified
without -mcpu=future.
(rs6000_slow_unaligned_access): Use VECTOR_ALIGNMENT_P.
(quad_address_p): Change size test to less than 16 bytes.
(reg_offset_addressing_ok_p): Add support for ISA 3.1 vector pair
and vector quad instructions.
(avoiding_indexed_address_p): Likewise.
(rs6000_emit_move): Disallow POImode and PXImode moves involving
constants.
(rs6000_preferred_reload_class): Prefer VSX registers for POImode
and FP registers for PXImode.
(rs6000_split_multireg_move): Support splitting POImode and PXImode
move instructions.
(rs6000_mangle_type): Adjust comment.  Add support for mangling
__vector_pair and __vector_quad types.
(rs6000_opt_masks): Add entry for mma.
(rs6000_builtin_mask_names): Add RS6000_BTM_MMA and RS6000_BTM_FUTURE.
(rs6000_function_value): Use VECTOR_ALIGNMENT_P.
(address_to_insn_form): Likewise.
(reg_to_non_prefixed): Likewise.
(rs6000_invalid_conversion): New function.
* config/rs6000/rs6000.h (MASK_MMA): Define.
(BIGGEST_ALIGNMENT): Set to 512 if MMA support is enabled.
(VECTOR_ALIGNMENT_P): New helper macro.
(ALTIVEC_VECTOR_MODE): Use VECTOR_ALIGNMENT_P.
(RS6000_BTM_MMA): Define.
(RS6000_BTM_COMMON): Add RS6000_BTM_MMA and RS6000_BTM_FUTURE.
(rs6000_builtin_type_index): Add RS6000_BTI_vector_pair and
RS6000_BTI_vector_quad.
(vector_pair_type_node): New.
(vector_quad_type_node): New.
* config/rs6000/rs6000.md: Include mma.md.
(define_mode_iterator RELOAD): Add POI and PXI.
* config/rs6000/t-rs6000 (MD_INCLUDES): Add mma.md.
* config/rs6000/rs6000.opt (-mmma): New.
* doc/invoke.texi: Document -mmma.

Daily bump.

coroutines: Update handling and failure for g-r-o-o-a-f [PR95505]

The actual issue is that (in the testcase) std::nothrow is not
available.  So update the handling of the get-return-on-alloc-fail
to include the possibility that std::nothrow might not be
available.

gcc/cp/ChangeLog:

PR c++/95505
* coroutines.cc (morph_fn_to_coro): Update handling of
get-return-object-on-allocation-fail and diagnose missing
std::nothrow.

gcc/testsuite/ChangeLog:

PR c++/95505
* g++.dg/coroutines/pr95505.C: New test.

c++: Refinements to "more constrained".

P2113 from the last C++ meeting clarified that we only compare constraints
on functions or function templates that have equivalent template parameters
and function parameters.

I'm not currently implementing the complicated handling of reversed
comparison operators here; thinking about it now, it seems like a lot of
complexity to support a very weird usage.  If I write two similar comparison
operators to be distinguished by their constraints, why would I write one
reversed?  If they're two unrelated operators, they're very unlikely to be
similar enough for the complexity to help.  I've started a discussion on the
committee reflector about changing these rules.

This change breaks some greedy_ops tests in libstdc++ that were relying on
comparing constraints on unrelated templates, which seems pretty clearly
wrong, so I'm removing those tests for now.

gcc/cp/ChangeLog:

* call.c (joust): Only compare constraints for non-template
candidates with matching parameters.
* pt.c (tsubst_pack_expansion): Fix getting a type parameter
pack.
(more_specialized_fn): Only compare constraints for candidates with
matching parameters.

gcc/testsuite/ChangeLog:

* g++.dg/cpp2a/concepts-return-req1.C: Expect error.
* g++.dg/cpp2a/concepts-p2113a.C: New test.
* g++.dg/cpp2a/concepts-p2113b.C: New test.

libstdc++-v3/ChangeLog:

* testsuite/24_iterators/move_iterator/rel_ops_c++20.cc:
Remove greedy_ops tests.
* testsuite/24_iterators/reverse_iterator/rel_ops_c++20.cc:
Remove greedy_ops tests.

PR fortran/95707 - ICE in finish_equivalences, at fortran/trans-common.c:1319

With submodules and equivalence declarations, name mangling may result in
long internal symbols overflowing internal buffers.  We now check that
we do not exceed the enlarged buffer sizes.

gcc/fortran/
PR fortran/95707
* gfortran.h (gfc_common_head): Enlarge buffer.
* trans-common.c (gfc_sym_mangled_common_id): Enlarge temporary
buffers, and add check on length on mangled name to prevent
overflow.

PR fortran/95688 - ICE in gfc_get_string, at fortran/iresolve.c:70

With submodules, name mangling of character pointer declarations produces long
internal symbols that overflowed a static internal buffer.  Adjust the buffer
size.

gcc/fortran/
PR fortran/95688
* iresolve.c (gfc_get_string): Enlarge static buffer size.

PR fortran/95687 - ICE in get_unique_hashed_string, at fortran/class.c:508

With submodules and PDTs, name mangling of interfaces may result in long
internal symbols overflowing a previously static internal buffer.  We now
set the buffer size dynamically.

gcc/fortran/
PR fortran/95687
* class.c (get_unique_type_string): Return a string with dynamic
length.
(get_unique_hashed_string, gfc_hash_value): Use dynamic result
from get_unique_type_string instead of static buffer.

PR fortran/95689 - ICE in check_sym_interfaces, at fortran/interface.c:2015

With submodules, name mangling of interfaces may result in long internal
symbols overflowing an internal buffer.  We now check that we do not
exceed the enlarged buffer size.

gcc/fortran/
PR fortran/95689
* interface.c (check_sym_interfaces): Enlarge temporary buffer,
and add check on length on mangled name to prevent overflow.

PR fortran/95587 - ICE in gfc_target_encode_expr, at fortran/target-memory.c:362

EQUIVALENCE objects are subject to constraints listed in the Fortran 2018
standard, section 8.10.1.1.  These constraints are to be checked
also for CLASS variables.

gcc/fortran/
PR fortran/95587
* match.c (gfc_match_equivalence): Check constraints on
EQUIVALENCE objects also for CLASS variables.

Record and restore postorder information in breaking alias sccs.

gcc/
PR tree-optimization/95638
* tree-loop-distribution.c (pg_edge_callback_data): New field.
(loop_distribution::break_alias_scc_partitions): Record and restore
postorder information.  Fix memory leak.

gcc/testsuite/
PR tree-optimization/95638
* g++.dg/tree-ssa/pr95638.C: New test.

Daily bump.

testsuite: popcount[45]ll require lp64

popcount[45]ll require __builtin_popcountll, but the test can succeed
without libcall through expand_doubleword_popcount.  However the Tree-SSA
optiization requires recognition of POPCOUNT.  This patch limits the test
to lp64 for the targets that fall through the cracks and were not
caught by the dg-require-effective-target popcountll.

gcc/testsuite/ChangeLog

2020-06-19  David Edelsohn  <dje.gcc@gmail.com>

* gcc.dg/tree-ssa/popcount4ll.c: Add target lp64.
* gcc.dg/tree-ssa/popcount5ll.c: Same.

libstdc++: Fix some -Wsystem-headers warnings (PR 95765)

PR libstdc++/95765
* include/bits/stl_algobase.h (__size_to_integer(float))
(__size_to_integer(double), __size_to_integer(long double))
(__size_to_integer(__float128)): Cast return type explicitly.
* include/bits/stl_uninitialized.h (__uninitialized_default_1<true>):
Remove unused typedef.

c++: Allow defaulted comparison outside class.

Implementing P2085, another refinement to the operator<=> specification from
the Prague meeting.  It was deemed desirable to be able to have a non-inline
defaulted definition of a comparison operator just like you can with other
defaulted functions.

gcc/cp/ChangeLog:

* method.c (early_check_defaulted_comparison): Allow defaulting
comparison outside class.  Complain if non-member operator isn't a
friend.

gcc/testsuite/ChangeLog:

* g++.dg/cpp2a/spaceship-friend1.C: New test.
* g++.dg/cpp2a/spaceship-err4.C: Adjust diagnostic.

rs6000: apply -mbig option to vec-extract[hl] testcases conditionally.

gcc/testsuite/ChangeLog

2020-06-19  David Edelsohn  <dje.gcc@gmail.com>

* gcc.target/powerpc/vec-extracth-be-0.c: Apply -mbig
conditionally for powerpc64le*-*-*.
* gcc.target/powerpc/vec-extracth-be-1.c: Same.
* gcc.target/powerpc/vec-extracth-be-2.c: Same.
* gcc.target/powerpc/vec-extracth-be-3.c: Same.
* gcc.target/powerpc/vec-extractl-be-0.c: Same.
* gcc.target/powerpc/vec-extractl-be-1.c: Same.
* gcc.target/powerpc/vec-extractl-be-2.c: Same.
* gcc.target/powerpc/vec-extractl-be-3.c: Same.

amdgcn: Silence compile warnings

gcc/ChangeLog:

* config/gcn/gcn.c (gcn_related_vector_mode): Add ARG_UNUSED.
(output_file_start): Use const 'char *'.

Fix PR94880: Failure to recognize andn pattern

Pattern "(x | y) - y" can be optimized to simple "(x & ~y)" andn
pattern.

Bootstrapped and tested on aarch64-none-linux-gnu.

gcc/ChangeLog:

PR tree-optimization/94880
* match.pd (A | B) - B -> (A & ~B): New simplification.

gcc/testsuite/ChangeLog:

PR tree-optimization/94880
* gcc.dg/tree-ssa/pr94880.c: New Test.

Handle SLP_TREE_LANE_PERMUTATION in scalar costing

This properly handles a lane permutation in scalar costing.
For the current only use this doesn't matter much but with
permutes that change the number of lanes it will eventually
ICE.

2020-06-19  Richard Biener  <rguenther@suse.de>

* tree-vect-slp.c (vect_bb_slp_scalar_cost): Adjust
for lane permutations.

libstdc++: Remove redundant std:: qualification

* include/bits/stl_pair.h (_Index_tuple): Remove redundant
namespace qualification.
(pair::pair(tuple<>&, tuple<>&, _Index_tuple, _Index_tuple)):
Likewise.
* include/std/tuple (_Head_base, _Tuple_impl, tuple_size)
(tuple_element, __get_helper, get, __make_tuple_impl)
(__make_1st_indices, __tuple_concater)
(pair::pair(tuple<>&, tuple<>&, _Index_tuple, _Index_tuple)):
Likewise.
* include/std/utility (tuple_element, __is_tuple_like_impl)
(tuple_size, __pair_get, get): Likewise.

libstdc++: Define all std::function members inline

* include/bits/std_function.h (function): Define all member
functions inline.

libstdc++: std::includes performance tweak

A small tweak to the implementation of __includes, which in my
application saves 20% of the running time. I noticed it because using
range-v3 was giving unexpected performance gains.

Some of the gain comes from pulling the 2 calls ++__first1 out of the
condition so there is just one call. And most of the gain comes from
replacing the resulting

if (__comp(__first1, __first2))
  ;
else
  ++__first2;

with

if (!__comp(__first1, __first2))
  ++__first2;

I was very surprised that the code ended up being so different for such
a change, and I still don't really understand where the extra time is
going...

Anyway, while I blame the compiler for not generating very good code
with the current implementation, I believe the change can be seen as a
simplification.

libstdc++-v3/ChangeLog:

* include/bits/stl_algo.h (__includes): Simplify the code.

tree-optimization/95761 - fix vector insertion place compute

I missed that indeed SLP permutation code generation can end up
refering to a non-last vectorized stmt in the last SLP_TREE_VEC_STMTS
element as optimization.  So walk them all.

2020-06-19  Richard Biener  <rguenther@suse.de>

PR tree-optimization/95761
* tree-vect-slp.c (vect_schedule_slp_instance): Walk all
vectorized stmts for finding the last one.

* gcc.dg/torture/pr95761.c: New testcase.

libstdc++: Optimize std::optional default constructor

The attached patch changes the code generated for

std::optional<std::array<int,1024>>f(){return{};}

from

        movq    $0, (%rdi)
        movq    %rdi, %r8
        leaq    8(%rdi), %rdi
        xorl    %eax, %eax
        movq    $0, 4084(%rdi)
        movq    %r8, %rcx
        andq    $-8, %rdi
        subq    %rdi, %rcx
        addl    $4100, %ecx
        shrl    $3, %ecx
        rep stosq
        movq    %r8, %rax

or with different tuning

        subq    $8, %rsp
        movl    $4100, %edx
        xorl    %esi, %esi
        call    memset
        addq    $8, %rsp

to the much shorter

        movb    $0, 4096(%rdi)
        movq    %rdi, %rax

i.e. the same as the nullopt constructor.

The constructor was already non-trivial, so we don't lose that. It passes the
testsuite without regression, but there is no new testcase to verify the
better codegen.

libstdc++-v3/ChangeLog:

* include/std/optional (optional()): Explicitly define it.

[Ada] Remove handling of 'Pos and 'Val attributes from gigi

2020-06-19  Eric Botcazou  <ebotcazou@adacore.com>

gcc/ada/

* gcc-interface/trans.c (lvalue_required_for_attribute_p): Do not deal
with 'Pos or 'Val.
(Attribute_to_gnu): Likewise.
* gcc-interface/utils.c (create_field_decl): Small formatting fix.

[Ada] Consolidate handling of implicit dereferences

2020-06-19  Eric Botcazou  <ebotcazou@adacore.com>

gcc/ada/

* gcc-interface/trans.c (adjust_for_implicit_deref): Delete.
(maybe_implicit_deref): Likewise.
(Attribute_to_gnu): Replace calls to maybe_implicit_deref by calls
to maybe_padded_object.
(Call_to_gnu): Likewise.
(gnat_to_gnu) <N_Indexed_Component>: Likewise.
<N_Slice>: Likewise.
<N_Selected_Component>: Likewise.
<N_Free_Statement>: Remove call to adjust_for_implicit_deref and
manually make sure that the designated type is complete.
* gcc-interface/utils2.c (build_simple_component_ref): Add comment.

[Ada] AI12-0028-1 Import of variadic C functions

2020-06-19  Eric Botcazou  <ebotcazou@adacore.com>

gcc/ada/

* gcc-interface/decl.c (gnat_to_gnu_param): Tidy up.
(gnat_to_gnu_subprog_type): For a variadic C function, do not
build unnamed parameters and do not add final void node.
* gcc-interface/misc.c: Include snames.h.
* gcc-interface/trans.c (Attribute_to_gnu): Tidy up.
(Call_to_gnu): Implement support for unnamed parameters in a
variadic C function.
* gcc-interface/utils.c: Include snames.h.
(copy_type): Tidy up.

[Ada] Further cleanup in constraint checking code for allocators

2020-06-19  Eric Botcazou  <ebotcazou@adacore.com>

gcc/ada/

* exp_ch5.adb (Expand_N_Assignment_Statement): Do not apply
range checks to allocators here.

[Ada] Crash on compiling project with multiple subunits per file

2020-06-19  Justin Squirek  <squirek@adacore.com>

gcc/ada/

* lib.adb (Check_Same_Extended_Unit): Add check to determine if
the body for the subunits exist in the same file as their
specifications.

[Ada] Fix check for bounds in aggregate expansion of allocator

2020-06-19  Eric Botcazou  <ebotcazou@adacore.com>

gcc/ada/

* exp_aggr.adb (In_Place_Assign_OK): In an allocator context,
check the bounds of an array aggregate against those of the
designated type, except if the latter is unconstrained.

[Ada] Fix small fallout of previous change for Analyze_Selected_Component

2020-06-19  Eric Botcazou  <ebotcazou@adacore.com>

gcc/ada/

* sem_ch3.adb (Is_Visible_Component): Reason only on the private
status of the original type in an instance body.

[Ada] Fix small fallout of previous change for allocator

2020-06-19  Eric Botcazou  <ebotcazou@adacore.com>

gcc/ada/

* sem_res.adb (Resolve_Qualified_Expression): Do not override the
type of the node when it is unconstrained if it is for an allocator.

[Ada] Plug small loophole in implementation of AI12-0100

2020-06-19  Eric Botcazou  <ebotcazou@adacore.com>

gcc/ada/

* sem_res.adb (Resolve_Allocator): Call Resolve_Qualified_Expression
on the qualified expression, if any, instead of doing an incomplete
type resolution manually.
(Resolve_Qualified_Expression): Apply predicate check to operand.

[Ada] Fix internal error on component of class-wide parameter in instance body

2020-06-19  Eric Botcazou  <ebotcazou@adacore.com>

gcc/ada/

* sem_ch4.adb (Analyze_Selected_Component): In an instance body,
also invoke Find_Component_In_Instance on the parent subtype of
a derived tagged type immediately visible.  Remove obsolete case.

[Ada] Deal with enumeration types with very large size

2020-06-19  Eric Botcazou  <ebotcazou@adacore.com>

gcc/ada/

* exp_attr.adb (Get_Integer_Type): Return the largest supported
unsigned integer type if need be.

[Ada] Spurious condition warning on type conversion in return

2020-06-19  Justin Squirek  <squirek@adacore.com>

gcc/ada/

* sem_warn.adb (Warn_On_Known_Condition): Add general sanity
check that asserts the original source node being checked
contains an entity. If not, it could be the result of special
case expansion for type conversions.

[Ada] Spurious error on private type in ghost expression function

2020-06-19  Ed Schonberg  <schonberg@adacore.com>

gcc/ada/

* sem_ch6.adb (Analyze_Expression_Function): Do not indicate
that the function has a completion if it appears within a Ghost
generic package.

[Ada] AI12-0293-1 Remove pragma Assert

2020-06-19  Bob Duff  <duff@adacore.com>

gcc/ada/

* libgnat/a-ststbo.adb (Write): Replace pragma Assert with "if
... raise Constraint_Error".

[Ada] Style checks on invalid UTF character cause crash

2020-06-19  Justin Squirek  <squirek@adacore.com>

gcc/ada/

* widechar.adb, widechar.ads (Skip_Wide): Catch validity check
failure when skipping over characters, and update comment to
reflect Skip_Wide's usage in error printing.

[Ada] ACATS 4.1G - C760A02 - Near infinite finalization

2020-06-19  Javier Miranda  <miranda@adacore.com>

gcc/ada/

* exp_ch3.ads (Ensure_Activation_Chain_And_Master): New
subprogram.
* exp_ch3.adb (Ensure_Activation_Chain_And_Master): New
subprogram that factorizes code.
(Expand_N_Object_Declaration): Call new subprogram.
* sem_ch6.adb (Analyze_Function_Return): Returning a
build-in-place unconstrained array type defer the full analysis
of the returned object to avoid generating the corresponding
constrained subtype; otherwise the bounds would be created in
the stack and a dangling reference would be returned pointing to
the bounds.

[Ada] AI12-0366 Changes to Big_Integer and Big_Real

2020-06-19  Arnaud Charlet  <charlet@adacore.com>

gcc/ada/

* libgnat/a-nbnbin.adb, libgnat/a-nbnbin.ads,
libgnat/a-nbnbin__gmp.adb, libgnat/a-nbnbre.adb,
libgnat/a-nbnbre.ads: Update spec according to AI12-0366.

[Ada] Minor remove extra whitespace in check suppression functions

2020-06-19  Piotr Trojanek  <trojanek@adacore.com>

gcc/ada/

* checks.ads: Remove excessive whitespace in declarations of
functions for check suppression.

[Ada] Attempt to hide public entities in nested instance bodies

2020-06-19  Eric Botcazou  <ebotcazou@adacore.com>

gcc/ada/

* sem_ch7.adb (Hide_Public_Entities): Split handling of objects
and subprograms, and do not reject the latter upfront in nested
instance specs if there are no referencer subprograms at all.
(Analyze_Package_Body_Helper): Also call Hide_Public_Entities on
nested generic instances.

[Ada] Reject junk expressions in attribute Update

2020-06-19  Piotr Trojanek  <trojanek@adacore.com>

gcc/ada/

* sem_attr.adb (Analyze_Attribute): Reject illegal positional
component associations; fix syntax in comment about named
component associations.

[Ada] Decorate record delta aggregate for GNATprove

2020-06-19  Piotr Trojanek  <trojanek@adacore.com>

gcc/ada/

* sem_aggr.adb (Resolve_Delta_Record_Aggregate): Modify a nested
Get_Component_Type routine to return a component and not just
its type; use this routine to decorate the identifier within the
delta aggregate.

[Ada] universal_access equality and 'Access attributes

2020-06-19  Arnaud Charlet  <charlet@adacore.com>

gcc/ada/

* sem_ch4.adb (Find_Equality_Types.Check_Access_Attribute): New.
(Find_Equality_Types): Move universal_access related checks at
the end of the processing and add call to
Check_Access_Attribute.

[Ada] Remove second warning for convention C_Variadic_n

2020-06-19  Eric Botcazou  <ebotcazou@adacore.com>

gcc/ada/

* sem_prag.adb (Process_Convention): Revert previous change.

[Ada] Small cleanup in Apply_Range_Check implementation

2020-06-19  Eric Botcazou  <ebotcazou@adacore.com>

gcc/ada/

* checks.ads (Apply_Static_Length_Check): Move up.
(Apply_Range_Check): Add parameter Insert_Node.
* checks.adb (Apply_Selected_Range_Checks): Merge into...
(Apply_Range_Check): ...this.  Add parameter Insert_Node,
pass it as Warn_Node to Selected_Range_Checks and use it
as insertion point for the checks.
* sem_ch3.adb (Analyze_Subtype_Declaration): Rewrite block
dealing with the range checks for the subtype indication.
Use local variable and call Apply_Range_Check in both cases.

[Ada] Fix validity checks on attribute 'Old prefix

2020-06-19  Piotr Trojanek  <trojanek@adacore.com>

gcc/ada/

* exp_attr.adb (Expand_N_Attribute_Reference): Call Ensure_Valid
on the expression of an object declaration that captures the
value of 'Old prefix.

[Ada] Add comments about attribute 'Valid_Scalars on private tagged types

2020-06-19  Piotr Trojanek  <trojanek@adacore.com>

gcc/ada/

* exp_attr.adb (Expand_N_Attribute_Reference): Add comment.
* sem_attr.adb (Analyze_Attribute): Add ??? comment.
* sem_util.ads (Valid_Scalars): This routine is only used for
'Valid_Scalars and not for 'Valid.

[Ada] Simplify processing of 'Valid_Scalars on array types

2020-06-19  Piotr Trojanek  <trojanek@adacore.com>

gcc/ada/

* exp_attr.adb (Expand_N_Attribute_Reference): Do not call
Scalar_Part_Present on the array component's type.
(Build_Array_VS_Func): Remove Comp_Typ parameter, because it can
be easily computed from the Array_Top parameter *and redundant
parameters are confusing and error-prone).

[Ada] Fix validity checking for class-wide objects

2020-06-19  Piotr Trojanek  <trojanek@adacore.com>

gcc/ada/

* exp_attr.adb (Build_Record_VS_Func): Strip privacy and type
derivation from the root type when 'Valid_Scalars is applied to
a class-wide type.

[Ada] Remove repeated testing of Check_Validity_Of_Parameters

2020-06-19  Piotr Trojanek  <trojanek@adacore.com>

gcc/ada/

* checks.adb (Apply_Parameter_Validity_Checks): Remove testing
of Check_Validity_Of_Parameters for every formal parameter and
function result.

[Ada] Add missing warning tag for some overlapping actuals warnings

2020-06-19  Arnaud Charlet  <charlet@adacore.com>

gcc/ada/

* sem_warn.adb (Warn_On_Overlapping_Actuals): Add missing
warning tag.

Daily bump.

c++: More P2002 operator<=> refinements.

* Disallow && references.
* Allow empty unions.
* Improve diagnostics for a subobject comparison with
  non-comparison-category type.

gcc/cp/ChangeLog:

* method.c (early_check_defaulted_comparison): Check for &&.
(build_comparison_op): Allow empty union.  Diagnose non-category
type.
(common_comparison_type): Remove handling for non-category type.

gcc/testsuite/ChangeLog:

* g++.dg/cpp2a/spaceship-ref1.C: New test.
* g++.dg/cpp2a/spaceship-synth-neg4.C: New test.
* g++.dg/cpp2a/spaceship-union1.C: New test.

vect: Use vect_relevant_for_alignment_p consistently

Minor code refactorings in tree-vect-data-refs.c.  When trying loop peeling
to force alignment, call vect_relevant_for_alignment_p to filter out data
references in the loop whose alignment is irrelevant.

2020-06-18  Felix Yang  <felix.yang@huawei.com>

gcc/
* tree-vect-data-refs.c (vect_enhance_data_refs_alignment): Call
vect_relevant_for_alignment_p to filter out data references in
the loop whose alignment is irrelevant when trying loop peeling
to force alignment.

i386: Fix mode of ZERO_EXTRACT RTXes, remove ext_register_operand predicate.

The mode of ZERO_EXTRACT RTX should match the mode of its LOC register
operand.  The mode should be HI, SI or DImode to enable combine to synthesize
extractions from HImode and DImode operands, in addition to existing SImode.
Further, these changes tighten allowed modes for extv, extzv and insv
named patterns and finally enable removal of ext_register_operand
special predicate.

2020-18-06  Uroš Bizjak  <ubizjak@gmail.com>

gcc/ChangeLog:

* config/i386/i386.md (*cmpqi_ext<mode>_1): Use SWI248 mode
iterator instead of SImode for ZERO_EXTRACT RTX.  Use SWI248
mode iterator for the first operand of ZERO_EXTRACT RTX.
Change ext_register_operand predicate to register_operand.
Rename from *cmpqi_ext_1.
(*cmpqi_ext<mode>_2): Ditto.  Rename from *cmpqi_ext_2.
(*cmpqi_ext<mode>_3): Ditto.  Rename from *cmpqi_ext_3.
(*cmpqi_ext<mode>_4): Ditto.  Rename from *cmpqi_ext_4.
(cmpi_ext_3): Use HImode instead of SImode for ZERO_EXTRACT RTX.
(*extv<mode>): Use SWI24 mode iterator for the first operand
of ZERO_EXTRACT RTX.  Change ext_register_operand predicate
to register_operand.
(*extzv<mode>): Use SWI248 mode iterator for the first operand
of ZERO_EXTRACT RTX.  Change ext_register_operand predicate
to register_operand.
(*extzvqi): Use SWI248 mode iterator instead of SImode for
ZERO_EXTRACT RTX.  Use SWI248 mode iterator for the first operand
of ZERO_EXTRACT RTX.  Change ext_register_operand predicate to
register_operand.
(*extzvqi_mem_rex64 and corresponding peephole2):  Use SWI248 mode
iterator instead of SImode for ZERO_EXTRACT RTX.  Use SWI248
mode iterator for the first operand of ZERO_EXTRACT RTX.
Change ext_register_operand predicate to register_operand.
(@insv<mode>_1): Use SWI248 mode iterator for the first operand
of ZERO_EXTRACT RTX.  Change ext_register_operand predicate to
register_operand.
(*insvqi_1): Use SWI248 mode iterator instead of SImode
for ZERO_EXTRACT RTX.  Use SWI248 mode iterator for the
first operand of ZERO_EXTRACT RTX.  Change ext_register_operand
predicate to register_operand.
(*insvqi_2): Ditto.
(*insvqi_3): Ditto.
(*insvqi_1_mem_rex64 and corresponding peephole2):  Use SWI248 mode
iterator instead of SImode for ZERO_EXTRACT RTX.  Use SWI248
mode iterator for the first operand of ZERO_EXTRACT RTX.
Change ext_register_operand predicate to register_operand.
(addqi_ext_1): New expander.
(*addqi_ext<mode>_1): Use SWI248 mode iterator instead of SImode
for ZERO_EXTRACT RTX.  Use SWI248 mode iterator for the first
operand of ZERO_EXTRACT RTX.  Change ext_register_operand predicate
to register_operand.  Rename from *addqi_ext_1.
(*addqi_ext<mode>_2): Ditto. Rename from *addqi_ext_2.
(divmodqi4): Use HImode instead of SImode for ZERO_EXTRACT RTX.
(udivmodqi4): Ditto.
(testqi_ext_1): Use HImode instead of SImode for ZERO_EXTRACT RTX.
(*testqi_ext<mode>_1): Use SWI248 mode iterator instead of SImode
for ZERO_EXTRACT RTX.  Use SWI248 mode iterator for the first
operand of ZERO_EXTRACT RTX.  Change ext_register_operand predicate
to register_operand.  Rename from *testqi_ext_1.
(*testqi_ext<mode>_2): Ditto.  Rename from *testqi_ext_2.
(andqi_ext_1): New expander.
(*andqi_ext<mode>_1): Use SWI248 mode iterator instead of SImode
for ZERO_EXTRACT RTX.  Use SWI248 mode iterator for the first
operand of ZERO_EXTRACT RTX.  Change ext_register_operand predicate
to register_operand.  Rename from andqi_ext_1.
(*andqi_ext<mode>_1_cc): Ditto.  Rename from *andqi_ext_1_cc.
(*andqi_ext<mode>_2): Ditto.  Rename from *andqi_ext_2.
(*<code>qi_ext<mode>_1): Ditto.  Rename from *<code>qi_ext_1.
(*<code>qi_ext<mode>_2): Ditto.  Rename from *<code>qi_ext_2.
(xorqi_ext_1_cc): Use HImode instead of SImode for ZERO_EXTRACT RTX.
(*xorqi_ext<mode>_1_cc):  Use SWI248 mode iterator instead of SImode
for ZERO_EXTRACT RTX.  Use SWI248 mode iterator for the first
operand of ZERO_EXTRACT RTX.  Change ext_register_operand predicate
to register_operand.  Rename from *xorqi_ext_1_cc.
* config/i386/i386-expand.c (ix86_split_idivmod): Emit ZERO_EXTRACT
in mode, matching its first operand.
(promote_duplicated_reg): Update for renamed insv<mode>_1.
* config/i386/predicates.md (ext_register_operand): Remove predicate.

gcc/testsuite/ChangeLog:

* gcc.target/i386/pr78904-1a.c: New test.
* gcc.target/i386/pr78904-1b.c: Ditto.
* gcc.target/i386/pr78904-2a.c: Ditto.
* gcc.target/i386/pr78904-2b.c: Ditto.
* gcc.target/i386/pr78904-3a.c: Ditto.
* gcc.target/i386/pr78904-3b.c: Ditto.
* gcc.target/i386/pr78904-4a.c: Ditto.
* gcc.target/i386/pr78904-4b.c: Ditto.
* gcc.target/i386/pr78904-5a.c: Ditto.
* gcc.target/i386/pr78904-5b.c: Ditto.
* gcc.target/i386/pr78904-6a.c: Ditto.
* gcc.target/i386/pr78904-6b.c: Ditto.
* gcc.target/i386/pr78967-1a.c: Ditto.
* gcc.target/i386/pr78967-1b.c: Ditto.
* gcc.target/i386/pr78967-2a.c: Ditto.
* gcc.target/i386/pr78967-2b.c: Ditto.

Avoid warning for memset writing over multiple members.

Resolves:
PR middle-end/95667 - unintended warning for memset writing across multiple members
PR middle-end/92814 - missing -Wstringop-overflow writing into a dynamically allocated flexible array member

gcc/ChangeLog:

PR middle-end/95667
PR middle-end/92814
* builtins.c (compute_objsize): Remove call to
compute_builtin_object_size and instead compute conservative sizes
directly here.

gcc/testsuite/ChangeLog:

PR middle-end/95667
PR middle-end/92814
* gcc.dg/Wstringop-overflow-25.c: Remove xfails.
* gcc.dg/Wstringop-overflow-39.c: New test.

c++: ICE in requires-expressions with invalid args [PR95735]

This ICE-on-invalid goes back to GCC 6.  In finish_template_variable,
if coerce_innermost_template_parms returns error_mark_node, we pass
it down to constraints_satisfied_p and that error_mark_node flows
down to various satisfy_* functions and then to various tsubst_*
functions, where we crash.  diagnose_constraints also doesn't cope
with error arglist, so I think we should just return as in the
patch below.

gcc/cp/ChangeLog:

PR c++/95735
* pt.c (finish_template_variable): Return if
coerce_innermost_template_parms return error_mark_node.

gcc/testsuite/ChangeLog:

PR c++/95735
* g++.dg/cpp2a/concepts-err2.C: New test.

Fix use of inaccessible member in pr94052.C

The recent PR41437 fix exposed a latent use of an inaccessible member in
the below testcase.

gcc/testsuite/ChangeLog:

* g++.target/aarch64/pr94052.C: Give z::ad public access.

vectorizer: add _bb_vec_info::region_stmts and reverse_region_stmts

gcc/ChangeLog:

* coretypes.h (struct iterator_range): New type.
* tree-vect-patterns.c (vect_determine_precisions): Use
range-based iterator.
(vect_pattern_recog): Likewise.
* tree-vect-slp.c (_bb_vec_info):  Likewise.
(_bb_vec_info::~_bb_vec_info): Likewise.
(vect_slp_check_for_constructors): Likewise.
* tree-vectorizer.h:Add new iterators
and functions that use it.

Add missing PR number to ChangeLog (PR 95378)

gcc/c-family/ChangeLog:

* ChangeLog:

rs6000: Fix creation of VEC_COND_EXPR

gcc/ChangeLog:

* config/rs6000/rs6000-call.c (fold_build_vec_cmp):
Since 502d63b6d6141597bb18fd23c87736a1b384cf8f, first argument
of a VEC_COND_EXPR cannot be tcc_comparison and so that
a SSA_NAME needs to be created before we use it for the first
argument of the VEC_COND_EXPR.
(fold_compare_helper): Pass gsi to fold_build_vec_cmp.

OpenMP/Fortran: Reject allocatable components in map clause

gcc/fortran/ChangeLog:

* openmp.c (resolve_omp_clauses): Reject vars with
allocatable components in OpenMP map clauses.

gcc/testsuite/ChangeLog:

* gfortran.dg/gomp/map-alloc-comp-1.f90: New test.

middle-end/95739 - fix vector condition IFN expansion

This fixes the omission of moving the expansion result to the
target.

2020-06-18  Richard Biener  <rguenther@suse.de>

PR middle-end/95739
* internal-fn.c (expand_vect_cond_optab_fn): Move the result
to the target if necessary.
(expand_vect_cond_mask_optab_fn): Likewise.

Fix typo in tree-ssa-reassoc.c.

gcc/ChangeLog:

* tree-ssa-reassoc.c (ovce_extract_ops): Replace *vcond with
vcond as we check for NULL pointer.

gcc-changelog: checkout & pull order

contrib/ChangeLog:

* gcc-changelog/git_update_version.py: First checkout and then
run git pull ---rebase.

c++: Fix tsubst ICE with invalid static_cast [PR95728]

Since r11-423 tsubst_copy_and_build/TREE_LIST uses tsubst_tree_list
instead of open coding it.  While the latter could return an error
node wrapped in a TREE_LIST, the former can return a naked error node.

That broke in tsubst_copy_and_build/NEW_EXPR:
  tree placement = RECUR (TREE_OPERAND (t, 0));
  // placement is now error_mark_node, so...
  for (; placement != NULL_TREE; placement = TREE_CHAIN (placement))
  // ... this crashes

If we just return, we avoid the ICE and improve the diagnostic a bit.

gcc/cp/ChangeLog:

PR c++/95728
* pt.c (tsubst_copy_and_build) <case NEW_EXPR>: Return error_mark_node
if placement is erroneous.

gcc/testsuite/ChangeLog:

PR c++/95728
* g++.dg/template/cast6.C: New test.

gcc-changelog: support merge commits in git_update_version

contrib/ChangeLog:

* gcc-changelog/git_update_version.py: Support merge commits
and walk only on the branch that is being merged and generate
missing ChangeLog entries.

silence empty-body warning

gcc/ChangeLog:

* gimple-pretty-print.c (dump_binary_rhs): Use braces to
silence empty-body warning with gcc_fallthrough.

phiopt: Improve minmax optimization [PR95699]

As discussed in the PR, the
x < 0x80000000U to (int) x >= 0
optimization stands in the way of minmax_replacement optimization,
so for comparisons with most of the constants it works well, but when the
above mentioned optimization triggers, it is unable to do it.
The match.pd (cond (cmp (convert? x) c1) (op x c2) c3) -> (op (minmax x c1) c2)
optimization is able to look through that and this patch
teaches minmax_replacement about it too.

2020-06-18  Jakub Jelinek  <jakub@redhat.com>

PR tree-optimization/95699
* tree-ssa-phiopt.c (minmax_replacement): Treat (signed int)x < 0
as x > INT_MAX and (signed int)x >= 0 as x <= INT_MAX.  Move variable
declarations to the statements that set them where possible.

* gcc.dg/tree-ssa/pr95699.c: New test.

forwprop: simplify_vector_constructor follow-up fix [PR95713]

As the following testcase shows, the exception for the aarch64
vec_pack_trunc_di is not sufficient on x86, the halfvectype
"vectors" have SImode but the x86 vec_pack_trunc_si meant for
the bool bitmasks combines 2x SImode into DImode, while in the
testcase the halfvectype is 1x SImode "vector" with SImode and
result is 2x HImode "vector" with SImode.

Richard Sandiford's reply:
FWIW, since the aarch64 case was only found by inspection and might
not be useful, personally I'd prefer to drop that case after all.

2020-06-18  Jakub Jelinek  <jakub@redhat.com>

PR target/95713
* tree-ssa-forwprop.c (simplify_vector_constructor): Don't allow
scalar mode halfvectype other than vector boolean for
VEC_PACK_TRUNC_EXPR.

* gcc.dg/pr95713.c: New test.

avoid early asm output

This avoids early assembler output via the gimplifier creating
new static CTORs.  The output machinery seems to be prepared to
output constants recursively and it's just a matter of
appropriately defering or not defering output.

This also has the advantage of not outputting .string for
optimized away local aggregate initializers containing string
references.

2020-06-18  Richard Biener  <rguenther@suse.de>

* varasm.c (assemble_variable): Make sure to not
defer output when outputting addressed constants.
(output_constant_def_contents): Likewise.
(add_constant_to_table): Take and pass on whether to
defer output.
(output_addressed_constants): Likewise.
(output_constant_def): Pass on whether to defer output
to add_constant_to_table.
(tree_output_constant_def): Defer output of constants.

remove SLP_TREE_TWO_OPERATORS, add SLP permutation node

This removes the SLP_TREE_TWO_OPERATORS hack in favor of having
explicit SLP nodes for both computations and the blend operation.
For this introduce a generic merge + select + permute SLP node
(with implementation limits).

Building upon earlier patches it adds vect_stmt_dominates_stmt_p
and the ability to compute a vector insertion place from
vectorized stmts (which now have UID zero) as needed for
the permute node.

2020-06-17  Richard Biener  <rguenther@suse.de>

* tree-vectorizer.h (_slp_tree::two_operators): Remove.
(_slp_tree::lane_permutation): New member.
(_slp_tree::code): Likewise.
(SLP_TREE_TWO_OPERATORS): Remove.
(SLP_TREE_LANE_PERMUTATION): New.
(SLP_TREE_CODE): Likewise.
(vect_stmt_dominates_stmt_p): Declare.
* tree-vectorizer.c (vect_stmt_dominates_stmt_p): New function.
* tree-vect-stmts.c (vect_model_simple_cost): Remove
SLP_TREE_TWO_OPERATORS handling.
* tree-vect-slp.c (_slp_tree::_slp_tree): Amend.
(_slp_tree::~_slp_tree): Likewise.
(vect_two_operations_perm_ok_p): Remove.
(vect_build_slp_tree_1): Remove verification of two-operator
permutation here.
(vect_build_slp_tree_2): When we have two different operators
build two computation SLP nodes and a blend.
(vect_print_slp_tree): Print the lane permutation if it exists.
(slp_copy_subtree): Copy it.
(vect_slp_rearrange_stmts): Re-arrange it.
(vect_slp_analyze_node_operations_1): Handle SLP_TREE_CODE
VEC_PERM_EXPR explicitely.
(vect_schedule_slp_instance): Likewise.  Remove old
SLP_TREE_TWO_OPERATORS code.
(vectorizable_slp_permutation): New function.

[Ada] Fix small inefficiency in previous change to expander

2020-06-18  Eric Botcazou  <ebotcazou@adacore.com>

gcc/ada/

* exp_ch4.adb (Get_Size_For_Range): Only make sure to return a
size lower than that of the original type if possible.
* libgnat/s-rannum.adb (Random_Discrete): Back out optimization
added for 32-bit types.

[Ada] ACATS 4.1J - B854003 - Subtype conformance check missed

2020-06-18  Arnaud Charlet  <charlet@adacore.com>

gcc/ada/

* sem_ch6.ads, sem_ch6.adb (Check_Formal_Conformance): New
subprogram.
(Check_Conformance): Move code to Check_Formal_Conformance.
* sem_ch8.adb (Analyze_Subprogram_Renaming): Check for formal
conformance when needed.