We no longer emit a bogus warning for the below testcase after
r11-3266-g4839de55e2c986.

	PR c++/71637

gcc/testsuite/ChangeLog:

	* c-c++-common/Wmisleading-indentation-6.c: New test.

I noticed that the vsx_extract_<mode> pattern for V2DImode and V2DFmode
only allowed traditional floating point registers, and it did not allow
Altivec registers.  The original code was written a few years ago when we
used the old register allocator, and support for scalar floating point in
Altivec registers was just being added to GCC.

I have built the spec 2017 benchmark suite With all 4 patches in this
series applied, and compared it to the build with the previous 3 patches
applied.  In addition to the changes from the previous 3 patches, this
patch now changes the code for the following 3 benchmarks (2 floating
point, 1 integer):

	bwaves_r, fotonik3d_r, xalancbmk_r

I have built bootstrap versions on the following systems.  There were no
regressions in the runs:

	Power9 little endian, --with-cpu=power9
	Power10 little endian, --with-cpu=power10
	Power8 big endian, --with-cpu=power8 (both 32-bit & 64-bit tests)

2022-03-29   Michael Meissner  <meissner@linux.ibm.com>

gcc/
	* config/rs6000/vsx.md (vsx_extract_<mode>): Allow destination to
	be any VSX register.

On aarch64 the AAPCS64 states that an HFA is determined by the 'shape' of
the object after layout has been completed, so anything that adds no
members and does not cause the layout to be modified should be ignored
for the purposes of determining which registers are used for parameter
passing.

A zero-sized bit-field falls into this category.  This was not handled
correctly for C structs and in G++-11 only handled correctly because
such fields were eliminated early by the front end.

gcc/ChangeLog:

	PR target/102024
	* config/aarch64/aarch64.cc (aapcs_vfp_sub_candidate): Handle
	zero-sized bit-fields.  Detect cases where a warning may be needed.
	(aarch64_vfp_is_call_or_return_candidate): Emit a note if a
	zero-sized bit-field has caused parameter passing to change.

gcc/testsuite/ChangeLog:

	* gcc.target/aarch64/aapcs64/test_28.c: New test.

On arm the AAPCS states that an HFA is determined by the 'shape' of
the object after layout has been completed, so anything that adds no
members and does not cause the layout to be modified should be ignored
for the purposes of determining which registers are used for parameter
passing.

A zero-sized bit-field falls into this category.  This was not handled
correctly for C structs and in G++-11 only handled correctly because
such fields were eliminated early by the front end.

gcc/ChangeLog:

	PR target/102024
	* config/arm/arm.cc (aapcs_vfp_sub_candidate): Handle zero-sized
	bit-fields.  Detect cases where a warning may be needed.
	(aapcs_vfp_is_call_or_return_candidate): Emit a note if
	a zero-sized bit-field has caused parameter passing to change.

gcc/testsuite/ChangeLog:

	PR target/102024
	* gcc.target/arm/aapcs/vfp26.c: New test.

The arm port has an optimization used during selection of the
function's ABI to permit deviation from the strict ABI when the
function does not escape the current translation unit.

Unfortunately, the ABI selection it makes can be unsafe if it changes
how a result is returned because not enough information is available
via the RETURN_IN_MEMORY hook to determine where the function gets
used.  This can result in some parts of the compiler thinking a value
is returned in memory while others think it is returned in registers.

To mitigate this, this patch temporarily disables the optimization and
falls back to using the default ABI for the translation.

gcc/ChangeLog:

	PR target/96882
	* config/arm/arm.cc (arm_get_pcs_model): Disable selection of
	ARM_PCS_AAPCS_LOCAL.

Add preprocessor macros __PTX_ISA_VERSION_MAJOR__ and
__PTX_ISA_VERSION_MINOR__.

For the default 6.0, we have:
...
 $ echo | cc1 -E -dD - 2>&1 | grep PTX_ISA_VERSION
 #define __PTX_ISA_VERSION_MAJOR__ 6
 #define __PTX_ISA_VERSION_MINOR__ 0
...
and for 3.1, we have:
...
 $ echo | cc1 -mptx=3.1 -E -dD - 2>&1 | grep PTX_ISA_VERSION
 #define __PTX_ISA_VERSION_MAJOR__ 3
 #define __PTX_ISA_VERSION_MINOR__ 1
...

These can be used to express things like:
...
 #if __PTX_ISA_VERSION_MAJOR__ >= 4 && __PTX_ISA_VERSION_MAJOR__ >= 1
   /* Code using %dynamic_smem_size.  */
 #else
   /* Fallback code.  */
 #endif
...

Tested on nvptx.

gcc/ChangeLog:

2022-03-29  Tom de Vries  <tdevries@suse.de>

	PR target/104857
	* config/nvptx/nvptx-c.cc (nvptx_cpu_cpp_builtins): Emit
	__PTX_ISA_VERSION_MAJOR__ and __PTX_ISA_VERSION_MINOR__.
	* config/nvptx/nvptx.cc (ptx_version_to_number): New function.
	* config/nvptx/nvptx-protos.h (ptx_version_to_number): Declare.

gcc/testsuite/ChangeLog:

2022-03-29  Tom de Vries  <tdevries@suse.de>

	PR target/104857
	* gcc.target/nvptx/ptx31.c: New test.
	* gcc.target/nvptx/ptx60.c: New test.
	* gcc.target/nvptx/ptx63.c: New test.
	* gcc.target/nvptx/ptx70.c: New test.

In the docs we have for m64:
...
Ignored, but preserved for backward compatibility.  Only 64-bit ABI is
supported.
...

But with --target-help, we have instead:
...
$ gcc --target-help
  ...
  -m64    Generate code for a 64-bit ABI.
...
which could be interpreted as meaning that generating code for a 32-bit ABI is
still possible.

Fix this by instead emitting the same text as in the docs:
...
  -m64    Ignored, but preserved for backward compatibility.  Only 64-bit
          ABI is supported.
...

Tested on nvptx.

gcc/ChangeLog:

2022-03-29  Tom de Vries  <tdevries@suse.de>

	* config/nvptx/nvptx.opt (m64): Update help text to reflect that it
	is ignored.

Say we have an sm_50 board, and we want to run a benchmark using the highest
possible march setting.

Currently there's march=sm_30, march=sm_35, march=sm_53, but no march=sm_50.

So, we'd need to pick march=sm_35.

Likewise, for a test script that handles multiple boards, we'd need a mapping
from native board sm_xx to march, which might have to be updated with newer
gcc releases.

Add an option march-map, such that we can just specify march-map=sm_50, and
let the compiler map this to the appropriate march.

The option is implemented as a list of aliases, such that we have a somewhat
lengthy (17 lines in total):
...
$ gcc --help=target
  ...
  -march-map=sm_30            Same as -misa=sm_30.
  -march-map=sm_32            Same as -misa=sm_30.
  ...
  -march-map=sm_87            Same as -misa=sm_80.
  -march-map=sm_90            Same as -misa=sm_80.
...

This implementation was chosen in the hope that it'll be easier if
we end up with some misa multilib.

It would be nice to have the mapping list generated from an updated
nvptx-sm.def, but for now it's spelled out in nvptx.opt.

Tested on nvptx.

gcc/ChangeLog:

2022-03-29  Tom de Vries  <tdevries@suse.de>

	PR target/104714
	* config/nvptx/nvptx.opt (march-map=*): Add aliases.

gcc/testsuite/ChangeLog:

2022-03-29  Tom de Vries  <tdevries@suse.de>

	PR target/104714
	* gcc.target/nvptx/march-map.c: New test.

gcc/ChangeLog:

2022-03-28  Jan Hubicka  <hubicka@ucw.cz>

	* config/i386/i386-builtins.cc (ix86_vectorize_builtin_gather): Test
	TARGET_USE_GATHER_2PARTS and TARGET_USE_GATHER_4PARTS.
	* config/i386/i386.h (TARGET_USE_GATHER_2PARTS): New macro.
	(TARGET_USE_GATHER_4PARTS): New macro.
	* config/i386/x86-tune.def (X86_TUNE_USE_GATHER_2PARTS): New tune
	(X86_TUNE_USE_GATHER_4PARTS): New tune

The target option misa has the following description:
...
$ gcc --target-help 2>&1 | grep misa
  -misa=                      Specify the PTX ISA target architecture to use.
...

The name misa is somewhat poorly chosen.  It suggests that for a use
-misa=sm_30, sm_30 is the name of a specific Instruction Set Architecture.
Instead, sm_30 is the name of a specific target architecture in the generic
PTX Instruction Set Architecture.

Futhermore, there's mptx, which also has ISA in the description:
...
  -mptx=                      Specify the PTX ISA version to use.
...

Add the more intuitive alias march for misa:
...
$ gcc --target-help 2>&1 | grep march
  -march=                     Alias:  Same as -misa=.
...

Tested on nvptx.

gcc/ChangeLog:

2022-03-29  Tom de Vries  <tdevries@suse.de>

	* config/nvptx/nvptx.opt (march): Add alias of misa.

gcc/testsuite/ChangeLog:

2022-03-29  Tom de Vries  <tdevries@suse.de>

	* gcc.target/nvptx/main.c: New test.
	* gcc.target/nvptx/march.c: New test.

2022-03-29  Chenghua Xu  <xuchenghua@loongson.cn>

ChangeLog:

	* MAINTAINERS: (CPU Port Maintainers): Add myself and
	Lulu as LoongArch port maintainer.

2022-03-29  Chenghua Xu  <xuchenghua@loongson.cn>
	    Lulu Cheng  <chenglulu@loongson.cn>

gcc/ChangeLog:

	* doc/install.texi: Add LoongArch options section.
	* doc/invoke.texi: Add LoongArch options section.
	* doc/md.texi: Add LoongArch options section.

contrib/ChangeLog:

	* config-list.mk: Add LoongArch triplet.

2022-03-29  Chenghua Xu  <xuchenghua@loongson.cn>
	    Lulu Cheng  <chenglulu@loongson.cn>

gcc/testsuite/ChangeLog:

	* g++.dg/cpp0x/constexpr-rom.C: Add build options for LoongArch.
	* g++.old-deja/g++.abi/ptrmem.C: Add LoongArch support.
	* g++.old-deja/g++.pt/ptrmem6.C: xfail for LoongArch.
	* gcc.dg/20020312-2.c: Add LoongArch support.
	* c-c++-common/zero-scratch-regs-10.c: Like wise
	* c-c++-common/zero-scratch-regs-11.c: Like wise
	* c-c++-common/zero-scratch-regs-8.c: Like wise
	* c-c++-common/zero-scratch-regs-9.c: Like wise
	* gcc.dg/loop-8.c: Skip on LoongArch.
	* gcc.dg/torture/stackalign/builtin-apply-2.c: Likewise.
	* gcc.dg/tree-ssa/ssa-fre-3.c: Likewise.
	* go.test/go-test.exp: Define the LoongArch target.
	* lib/target-supports.exp: Like wise.
	* gcc.target/loongarch/loongarch.exp: New file.
	* gcc.target/loongarch/tst-asm-const.c: Like wise.
	* gcc.target/loongarch/larch-builtin.c: Like wise.

2022-03-29  Chenghua Xu  <xuchenghua@loongson.cn>
	    Lulu Cheng  <chenglulu@loongson.cn>

libgomp/ChangeLog:

	* configure.tgt: Add LoongArch triplet.

2022-03-29  Chenghua Xu  <xuchenghua@loongson.cn>
	    Lulu Cheng  <chenglulu@loongson.cn>

libgcc/ChangeLog:

	* configure: Regenerate file.

2022-03-29  Chenghua Xu  <xuchenghua@loongson.cn>
	    Lulu Cheng  <chenglulu@loongson.cn>

libgcc/ChangeLog:

	* config/loongarch/crtfastmath.c: New file.
	* config/loongarch/linux-unwind.h: Like wise.
	* config/loongarch/sfp-machine.h: Like wise.
	* config/loongarch/t-crtstuff: Like wise.
	* config/loongarch/t-loongarch: Like wise.
	* config/loongarch/t-loongarch64: Like wise.
	* config/loongarch/t-softfp-tf: Like wise.
	* config.host: Add LoongArch tuples.
	* configure.ac: Add LoongArch support.

2022-03-29  Chenghua Xu  <xuchenghua@loongson.cn>
	    Lulu Cheng  <chenglulu@loongson.cn>

gcc/ChangeLog:

	* config/loongarch/loongarch-c.cc

2022-03-29  Chenghua Xu  <xuchenghua@loongson.cn>
	    Lulu Cheng  <chenglulu@loongson.cn>

gcc/ChangeLog:

	* config/loongarch/larchintrin.h: New file.
	* config/loongarch/loongarch-builtins.cc: New file.

2022-03-29  Chenghua Xu  <xuchenghua@loongson.cn>
	    Lulu Cheng  <chenglulu@loongson.cn>

gcc/ChangeLog:

	* config/host-linux.cc: Add LoongArch support.
	* config/loongarch/loongarch-protos.h: New file.
	* config/loongarch/loongarch-tune.h: Likewise.
	* config/loongarch/loongarch.cc: Likewise.
	* config/loongarch/loongarch.h: Likewise.

2022-03-29  Chenghua Xu  <xuchenghua@loongson.cn>
	    Lulu Cheng  <chenglulu@loongson.cn>

gcc/ChangeLog:

	* config/loongarch/constraints.md: New file.
	* config/loongarch/generic.md: New file.
	* config/loongarch/la464.md: New file.
	* config/loongarch/loongarch-ftypes.def: New file.
	* config/loongarch/loongarch-modes.def: New file.
	* config/loongarch/loongarch.md: New file.
	* config/loongarch/predicates.md: New file.
	* config/loongarch/sync.md: New file.

2022-03-29  Chenghua Xu  <xuchenghua@loongson.cn>
	    Lulu Cheng  <chenglulu@loongson.cn>

gcc/ChangeLog:

	* configure: Regenerate file.

2022-03-29  Chenghua Xu  <xuchenghua@loongson.cn>
	    Lulu Cheng  <chenglulu@loongson.cn>

gcc/ChangeLog:

	* common/config/loongarch/loongarch-common.cc: New file.
	* config/loongarch/genopts/genstr.sh: New file.
	* config/loongarch/genopts/loongarch-strings: New file.
	* config/loongarch/genopts/loongarch.opt.in: New file.
	* config/loongarch/loongarch-str.h: New file.
	* config/loongarch/gnu-user.h: New file.
	* config/loongarch/linux.h: New file.
	* config/loongarch/loongarch-cpu.cc: New file.
	* config/loongarch/loongarch-cpu.h: New file.
	* config/loongarch/loongarch-def.c: New file.
	* config/loongarch/loongarch-def.h: New file.
	* config/loongarch/loongarch-driver.cc: New file.
	* config/loongarch/loongarch-driver.h: New file.
	* config/loongarch/loongarch-opts.cc: New file.
	* config/loongarch/loongarch-opts.h: New file.
	* config/loongarch/loongarch.opt: New file.
	* config/loongarch/t-linux: New file.
	* config/loongarch/t-loongarch: New file.
	* config.gcc: Add LoongArch support.
	* configure.ac: Add LoongArch support.

contrib/ChangeLog:

	* gcc_update (files_and_dependencies): Add
	  config/loongarch/loongarch.opt and config/loongarch/loongarch-str.h.

2022-03-29  Chenghua Xu  <xuchenghua@loongson.cn>
	    Lulu Cheng  <chenglulu@loongson.cn>

ChangeLog:

	* configure.ac: Add LoongArch tuples.
	* configure: Regenerate.

config/ChangeLog:

	* picflag.m4: Default add build option '-fpic' for LoongArch.

Originally introduced almost ten years ago in
r193303/commit 0829c7f7
"optc-gen.awk: Factor code out to...".

	gcc/
	* opt-functions.awk (lang_enabled_by): Fix 'enabledby_negargs'
	typo.

Once we no longer care about older compilers without this feature, we
can drop these static data members, so the names don't have to be
visible at class scope.

libstdc++-v3/ChangeLog:

	* libsupc++/compare (_Strong_order) [!__cpp_using_enum]: Add
	static data members for _Fp_fmt enumerators.

The conditions that guard the feature test macros in <version> should
match the main definitions of the macros in other headers.

This doesn't matter for GCC, because it supports all the conditions
being tested here, but it does matter for non-GCC compilers without the
relevant C++20 features.

libstdc++-v3/ChangeLog:

	* include/std/version (__cpp_lib_variant): Fix conditions to
	match <variant>.
	(__cpp_lib_expected): Fix condition to match <expected>.

Test must check for effective support of fpic.

gcc/testsuite/ChangeLog:
	* gcc.target/i386/pr103275.c: Add missing
	dg-require-effective-target for checking fpic.

On targets that do not have MXX/SSE enabled by default, pr97521
and pr96713 fail because they emit warnings:

pr97521.c:12:1: warning: MMX vector return without MMX enabled
                changes the ABI [-Wpsabi]
pr97521.c:11:1: note: the ABI for passing parameters with
                16-byte alignment has changed in GCC 4.6
pr97521.c:11:1: warning: SSE vector argument without SSE enabled
                changes the ABI [-Wpsabi]

Add -Wno-psabi to dg-options.

gcc/testsuite/ChangeLog:
	* gcc.target/i386/pr97521.c: Add -Wno-psabi to dg-options.
	* gcc.dg/analyzer/pr96713.c: Likewise.

When doing format diagnostics at -O0 we should make sure to make
SCEV available to avoid false positives due to ranges we otherwise
can trivially compute.

2022-03-28  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/105080
	* tree-ssa-strlen.cc (printf_strlen_execute): Always init
	loops and SCEV.

	* gcc.dg/pr105080.c: New testcase.

PR analyzer/105087 describes a false positive from
-Wanalyzer-double-free in which the analyzer erroneously considers two
successive inlined vasprintf calls to have allocated the same pointer.

The root cause is that the result written back from vasprintf is a
conjured_svalue, and that we normally purge state when reusing a
conjured_svalue, but various places in the code were calling
region_model_manager::get_or_create_conjured_svalue but failing to
then call region_model::purge_state_involving on the result.

This patch fixes things by moving responsibility for calling
region_model::purge_state_involving into
region_model_manager::get_or_create_conjured_svalue, so that it is
always called when reusing a conjured_svalue, fixing the false positive.

gcc/analyzer/ChangeLog:
	PR analyzer/105087
	* analyzer.h (class conjured_purge): New forward decl.
	* region-model-asm.cc (region_model::on_asm_stmt): Add
	conjured_purge param to calls binding_cluster::on_asm and
	region_model_manager::get_or_create_conjured_svalue.
	* region-model-impl-calls.cc
	(call_details::get_or_create_conjured_svalue): Likewise for call
	to region_model_manager::get_or_create_conjured_svalue.
	(region_model::impl_call_fgets): Remove call to
	region_model::purge_state_involving, as this is now done
	implicitly by call_details::get_or_create_conjured_svalue.
	(region_model::impl_call_fread): Likewise.
	(region_model::impl_call_strchr): Pass conjured_purge param to
	call to region_model_manager::get_or_create_conjured_svalue.
	* region-model-manager.cc (conjured_purge::purge): New.
	(region_model_manager::get_or_create_conjured_svalue): Add
	param "p".  Use it to purge state when reusing an existing
	conjured_svalue.
	* region-model.cc (region_model::on_call_pre): Replace call to
	region_model::purge_state_involving with passing conjured_purge
	to region_model_manager::get_or_create_conjured_svalue.
	(region_model::handle_unrecognized_call): Pass conjured_purge to
	store::on_unknown_fncall.
	* region-model.h
	(region_model_manager::get_or_create_conjured_svalue): Add param
	"p".
	* store.cc (binding_cluster::on_unknown_fncall): Likewise.  Pass
	it on to region_model_manager::get_or_create_conjured_svalue.
	(binding_cluster::on_asm): Likewise.
	(store::on_unknown_fncall): Add param "p" and pass it on to
	binding_cluster::on_unknown_fncall.
	* store.h (binding_cluster::on_unknown_fncall): Add param p.
	(binding_cluster::on_asm): Likewise.
	(store::on_unknown_fncall): Likewise.
	* svalue.h (class conjured_purge): New.

gcc/testsuite/ChangeLog:
	* gcc.dg/analyzer/pr105087-1.c: New test.
	* gcc.dg/analyzer/pr105087-2.c: New test.
	* gcc.dg/analyzer/vasprintf-1.c: New test.

Signed-off-by: David Malcolm <dmalcolm@redhat.com>

gcc/analyzer/ChangeLog:
	PR analyzer/105074
	* region.cc (ipa_ref_requires_tracking): Drop "context_fndecl",
	instead using the ref->referring to get the cgraph node of the
	caller.
	(symnode_requires_tracking_p): Likewise.

gcc/testsuite/ChangeLog:
	PR analyzer/105074
	* gcc.dg/analyzer/pr105074.c: New test.
	* gcc.dg/analyzer/untracked-1.c (extern_fn_char_ptr): New decl.
	(test_13): New.

Signed-off-by: David Malcolm <dmalcolm@redhat.com>

A minor cosmetic fix.

2022-03-28  Indu Bhagat  <indu.bhagat@oracle.com>

gcc/ChangeLog:

	* ctfout.cc (ctf_preprocess): Use ctfc_get_num_ctf_vars instead.
	(output_ctf_vars): Likewise.

The top-level configure options --with-gmp-dir and --with-mpfr-dir
were obsoleted and marked as "REMOVED" back in 2006.  I think that's
long enough ago for everyone to have updated their scripts, so this
patch removes them entirely.  While doing this, I also found one other
leftover that wasn't removed by the earlier patch.  This is also
removed here.

2022-03-28  Tom Tromey  <tromey@adacore.com>

	* configure.ac: Remove --with-mpfr-dir and --with-gmp-dir.
	* configure: Rebuild.

	* sv.po: Update.

These have been misdocumented since C++98 POD was split into C++11 trivial
and standard-layout in r149721.

	PR c++/59426

gcc/ChangeLog:

	* doc/extend.texi: Refer to __is_trivial instead of __is_pod.

gcc/cp/ChangeLog:

	* pt.cc (determine_specialization): Add comment.

We weren't rejecting a concept declared with multiple template
parameter lists.

	PR c++/105067

gcc/cp/ChangeLog:

	* pt.cc (finish_concept_definition): Check that a concept is
	declared with exactly one template parameter list.

gcc/testsuite/ChangeLog:

	* g++.dg/cpp2a/concepts-err4.C: New test.

Here during declaration matching for the two constrained template
friends, we crash from maybe_substitute_reqs_for because the second
friend doesn't yet have DECL_TEMPLATE_INFO set (we're being called
indirectly from push_template_decl).

As far as I can tell, this situation happens only when declaring a
constrained template friend within a non-template class (as in the
testcase), in which case the substitution would be a no-op anyway.
So this patch rearranges maybe_substitute_reqs_for to gracefully
handle missing DECL_TEMPLATE_INFO by just skipping the substitution.

	PR c++/105064

gcc/cp/ChangeLog:

	* constraint.cc (maybe_substitute_reqs_for): Don't assume
	DECL_TEMPLATE_INFO is available.

gcc/testsuite/ChangeLog:

	* g++.dg/cpp2a/concepts-friend9.C: New test.

	PR target/105068
	* config/i386/sse.md (*ssse3_pshufbv8qi3): Also replace "Yv" with
	"Yw" in clobber.