This patch stops preserving scope blocks just because they are inlined
function scopes, when cleaning up unused scope blocks.  This change
was introduced along with IEPM, but it preserved lots of blocks, and
output debug information for them, although no code from the inlined
function remained after optimization.

The additional preserved blocks took up compile-time memory, and
significant disk space and link time, in some cases more than 25%.
This is deemed excessive, compared with the reasonably small benefit
of allowing one to single-step into an inlined function using a
view-capable debugger.

There was another way of marking inlined function scopes as unused,
based on the markers referencing them during stmt scanning, but that
still preserved too much.

So, this patch restores the pre-IEPM logic of preservation of scopes.
Should a scope block referenced by an inline entry marker be found to
be unused in remove_unused_scope_block_p, the marker will be cleaned
up right after that, in clear_unused_block_pointer, so we won't keep
a dangling reference to a dropped block.

for  gcc/ChangeLog

	* tree-ssa-live.c (remove_unused_scope_block_p): Do not
	preserve inline entry blocks for the sake of debug inline
	entry point markers alone.
	(remove_unused_locals): Suggest in comments a better place to
	force the preservation of inline entry blocks that are
	otherwise unused, but do not preserve them.

From-SVN: r258026

	* tree.c (array_of_runtime_bound_p): False if the element is
	variably-modified.

From-SVN: r258023

	* call.c (unsafe_copy_elision_p): Handle COND_EXPR.

From-SVN: r258022

	* lambda.c (lambda_expr_this_capture): Don't look for fake NSDMI
	'this' in a generic lambda instantiation.

From-SVN: r258021

From-SVN: r258020

From-SVN: r258016

	* constexpr.c (ensure_literal_type_for_constexpr_object): Check
	for constexpr variable with VLA type.

From-SVN: r258015

	PR c++/84558
	* constexpr.c (cxx_eval_vec_init_1): For reuse, treat NULL eltinit like
	a valid constant initializer.  Formatting fixes.

	* g++.dg/cpp1y/pr84558.C: New test.

From-SVN: r258014

/cp
2018-02-26  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/84540
	* pt.c (tsubst_attributes): Handle correctly tsubst_attribute
	returning NULL_TREE.
	(apply_late_template_attributes): Likewise.

/testsuite
2018-02-26  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/84540
	* g++.dg/cpp0x/alignas14.C: New.
	* g++.dg/cpp0x/alignas15.C: Likewise.

From-SVN: r258012

	PR c++/84557
	* parser.c (cp_parser_omp_var_list_no_open): Only call
	cp_parser_lookup_name_simple on names satisfying identifier_p.
	(cp_parser_oacc_routine): Likewise.

	* g++.dg/gomp/pr84557.C: New test.

From-SVN: r258011

re PR debug/83917 (with -mcall-ms2sysv-xlogues, stepping into x86 tail-call restore stub gives bad backtrace)

	PR debug/83917
	* config/i386/i386-asm.h (PACKAGE_VERSION, PACKAGE_NAME,
	PACKAGE_STRING, PACKAGE_TARNAME, PACKAGE_URL): Undefine between
	inclusion of auto-target.h and auto-host.h.
	(USE_GAS_CFI_DIRECTIVES): Define if not defined already based on
	__GCC_HAVE_DWARF2_CFI_ASM.
	(cfi_startproc, cfi_endproc, cfi_adjust_cfa_offset,
	cfi_def_cfa_register, cfi_def_cfa, cfi_register, cfi_offset, cfi_push,
	cfi_pop): Define.
	* config/i386/cygwin.S: Don't include auto-host.h here, just
	define USE_GAS_CFI_DIRECTIVES to 1 or 0 and include i386-asm.h.
	(cfi_startproc, cfi_endproc, cfi_adjust_cfa_offset,
	cfi_def_cfa_register, cfi_register, cfi_push, cfi_pop): Remove.
	* config/i386/resms64fx.h: Add cfi_* directives.
	* config/i386/resms64x.h: Likewise.

From-SVN: r258010

	* parser.c (add_debug_begin_stmt): Do nothing in a concept.

From-SVN: r258009

	PR c++/84325
	* tree.c (replace_placeholders_r): Only check TREE_CONSTANT on
	non-types.

	* g++.dg/cpp1z/pr84325.C: New test.

From-SVN: r258008

gcc/testsuite/ChangeLog:

2018-02-26  Carl Love  <cel@us.ibm.com>
	* gcc.target/powerpc/builtins-3.c: Move vec_neg builtin tests to
	Power 8 test file.
	* gcc.target/powerpc/builtins-3-p8.c: Add vec_neg builtin tests.
	* gcc.target/powerpc/fold-vec-neg-char.c(dg-options): Add -mcpu=power8.
	* gcc.target/powerpc/fold-vec-neg-floatdouble.c(dg-options): Add
	-mcpu=power8.
	* gcc.target/powerpc/fold-vec-neg-int.c(dg-options): Remove file.
	* gcc.target/powerpc/fold-vec-neg-short.c(dg-options): Add
	-mcpu=power8.

From-SVN: r258006

Revision 257992 removed the bool argument from ix86_output_indirect_jmp.
Update comments to reflect it.

	* config/i386/i386.c (ix86_output_indirect_jmp): Update comments.

From-SVN: r258005

	* call.c (build_over_call): Handle deleted functions in one place.

From-SVN: r258003

	* g++.dg/ext/is_trivially_constructible6.C: New.

From-SVN: r258002

For

---
struct C {
  virtual ~C();
  virtual void f();
};

void
f (C *p)
{
  p->f();
  p->f();
}
---

-mindirect-branch=thunk-extern -O2 on x86-64 GNU/Linux generates:

_Z1fP1C:
.LFB0:
        .cfi_startproc
        pushq   %rbx
        .cfi_def_cfa_offset 16
        .cfi_offset 3, -16
        movq    (%rdi), %rax
        movq    %rdi, %rbx
        jmp     .LIND1
.LIND0:
        pushq   16(%rax)
        jmp     __x86_indirect_thunk
.LIND1:
        call    .LIND0
        movq    (%rbx), %rax
        movq    %rbx, %rdi
        popq    %rbx
        .cfi_def_cfa_offset 8
        movq    16(%rax), %rax
        jmp     __x86_indirect_thunk_rax
        .cfi_endproc

x86-64 is supposed to have asynchronous unwind tables by default, but
there is nothing that reflects the change in the (relative) frame
address after .LIND0.  That region really has to be moved outside of
the .cfi_startproc/.cfi_endproc bracket.

This patch adds TARGET_INDIRECT_BRANCH_REGISTER to force indirect
branch via register whenever -mindirect-branch= is used.  Now,
-mindirect-branch=thunk-extern -O2 on x86-64 GNU/Linux generates:

_Z1fP1C:
.LFB0:
	.cfi_startproc
	pushq	%rbx
	.cfi_def_cfa_offset 16
	.cfi_offset 3, -16
	movq	(%rdi), %rax
	movq	%rdi, %rbx
	movq	16(%rax), %rax
	call	__x86_indirect_thunk_rax
	movq	(%rbx), %rax
	movq	%rbx, %rdi
	popq	%rbx
	.cfi_def_cfa_offset 8
	movq	16(%rax), %rax
	jmp	__x86_indirect_thunk_rax
	.cfi_endproc

so that "-mindirect-branch=thunk-extern" is equivalent to
"-mindirect-branch=thunk-extern -mindirect-branch-register", which is
used by Linux kernel.

gcc/

	PR target/84039
	* config/i386/constraints.md (Bs): Replace
	ix86_indirect_branch_register with
	TARGET_INDIRECT_BRANCH_REGISTER.
	(Bw): Likewise.
	* config/i386/i386.md (indirect_jump): Likewise.
	(tablejump): Likewise.
	(*sibcall_memory): Likewise.
	(*sibcall_value_memory): Likewise.
	Peepholes of indirect call and jump via memory: Likewise.
	(*sibcall_GOT_32): Disallowed for TARGET_INDIRECT_BRANCH_REGISTER.
	(*sibcall_value_GOT_32): Likewise.
	* config/i386/i386.opt: Likewise.
	* config/i386/predicates.md (indirect_branch_operand): Likewise.
	(GOT_memory_operand): Likewise.
	(call_insn_operand): Likewise.
	(sibcall_insn_operand): Likewise.
	(GOT32_symbol_operand): Likewise.
	* config/i386/i386.h (TARGET_INDIRECT_BRANCH_REGISTER): New.

gcc/testsuite/

	PR target/84039
	* gcc.target/i386/indirect-thunk-1.c: Updated.
	* gcc.target/i386/indirect-thunk-2.c: Likewise.
	* gcc.target/i386/indirect-thunk-3.c: Likewise.
	* gcc.target/i386/indirect-thunk-4.c: Likewise.
	* gcc.target/i386/indirect-thunk-5.c: Likewise.
	* gcc.target/i386/indirect-thunk-6.c: Likewise.
	* gcc.target/i386/indirect-thunk-7.c: Likewise.
	* gcc.target/i386/indirect-thunk-attr-1.c: Likewise.
	* gcc.target/i386/indirect-thunk-attr-2.c: Likewise.
	* gcc.target/i386/indirect-thunk-attr-3.c: Likewise.
	* gcc.target/i386/indirect-thunk-attr-4.c: Likewise.
	* gcc.target/i386/indirect-thunk-attr-5.c: Likewise.
	* gcc.target/i386/indirect-thunk-attr-6.c: Likewise.
	* gcc.target/i386/indirect-thunk-attr-7.c: Likewise.
	* gcc.target/i386/indirect-thunk-bnd-1.c: Likewise.
	* gcc.target/i386/indirect-thunk-bnd-2.c: Likewise.
	* gcc.target/i386/indirect-thunk-bnd-3.c: Likewise.
	* gcc.target/i386/indirect-thunk-bnd-4.c: Likewise.
	* gcc.target/i386/indirect-thunk-extern-1.c: Likewise.
	* gcc.target/i386/indirect-thunk-extern-2.c: Likewise.
	* gcc.target/i386/indirect-thunk-extern-3.c: Likewise.
	* gcc.target/i386/indirect-thunk-extern-4.c: Likewise.
	* gcc.target/i386/indirect-thunk-extern-5.c: Likewise.
	* gcc.target/i386/indirect-thunk-extern-6.c: Likewise.
	* gcc.target/i386/indirect-thunk-extern-7.c: Likewise.
	* gcc.target/i386/indirect-thunk-inline-1.c: Likewise.
	* gcc.target/i386/indirect-thunk-inline-2.c: Likewise.
	* gcc.target/i386/indirect-thunk-inline-3.c: Likewise.
	* gcc.target/i386/indirect-thunk-inline-4.c: Likewise.
	* gcc.target/i386/indirect-thunk-inline-5.c: Likewise.
	* gcc.target/i386/indirect-thunk-inline-6.c: Likewise.
	* gcc.target/i386/indirect-thunk-inline-7.c: Likewise.
	* gcc.target/i386/ret-thunk-9.c: Likewise.
	* gcc.target/i386/ret-thunk-10.c: Likewise.
	* gcc.target/i386/ret-thunk-11.c: Likewise.
	* gcc.target/i386/ret-thunk-12.c: Likewise.
	* gcc.target/i386/ret-thunk-13.c: Likewise.
	* gcc.target/i386/ret-thunk-14.c: Likewise.
	* gcc.target/i386/ret-thunk-15.c: Likewise.

From-SVN: r258001

From-SVN: r257999

From-SVN: r257998

From-SVN: r257997

	PR rtl-optimization/83496
	* reorg.c (steal_delay_list_from_target): Change REDUNDANT array from
	booleans to RTXes.  Call fix_reg_dead_note on every non-null element.
	(steal_delay_list_from_fallthrough): Call fix_reg_dead_note on a
	redundant insn, if any.
	(relax_delay_slots): Likewise.
	(update_reg_unused_notes): Rename REDUNDANT_INSN to OTHER_INSN.

From-SVN: r257996

This patch prevents pattern-matching of fold-left SLP reduction chains,
which the previous patch for 83965 didn't handle properly.  It only
stops the last statement in the group from being matched, but that's
enough to cause the group to be dissolved later.

A better fix would be to put all the information about the reduction
on the the first statement in the reduction chain, so that every
statement in the group can tell what the group is doing.  That doesn't
seem like stage 4 material though.

2018-02-26  Richard Sandiford  <richard.sandiford@linaro.org>

gcc/
	PR tree-optimization/83965
	* tree-vect-patterns.c (vect_reassociating_reduction_p): Assume
	that grouped statements are part of a reduction chain.  Return
	true if the statement is not marked as a reduction itself but
	is part of a group.
	(vect_recog_dot_prod_pattern): Don't check whether the statement
	is part of a group here.
	(vect_recog_sad_pattern): Likewise.
	(vect_recog_widen_sum_pattern): Likewise.

gcc/testsuite/
	PR tree-optimization/83965
	* gcc.dg/vect/pr83965-2.c: New test.

From-SVN: r257995

2018-02-26  Tom de Vries  <tom@codesourcery.com>

	* gcc.c-torture/compile/regs-arg-size.c (swprintf): Declare.

From-SVN: r257994

	PR debug/84545
	* final.c (rest_of_clean_state): Also look for calls inside sequences.

From-SVN: r257993

When -mfunction-return= is used, simple_return_pop_internal should pop
return address into ECX register, adjust stack by bytes to pop from stack
and jump to the return thunk via ECX register.

Tested on i686 and x86-64.

	PR target/84530
	* config/i386/i386-protos.h (ix86_output_indirect_jmp): Remove
	the bool argument.
	(ix86_output_indirect_function_return): New prototype.
	(ix86_split_simple_return_pop_internal): Likewise.
	* config/i386/i386.c (indirect_return_via_cx): New.
	(indirect_return_via_cx_bnd): Likewise.
	(indirect_thunk_name): Handle return va CX_REG.
	(output_indirect_thunk_function): Create alias for
	__x86_return_thunk_[re]cx and __x86_return_thunk_[re]cx_bnd.
	(ix86_output_indirect_jmp): Remove the bool argument.
	(ix86_output_indirect_function_return): New function.
	(ix86_split_simple_return_pop_internal): Likewise.
	* config/i386/i386.md (*indirect_jump): Don't pass false
	to ix86_output_indirect_jmp.
	(*tablejump_1): Likewise.
	(simple_return_pop_internal): Change it to define_insn_and_split.
	Call ix86_split_simple_return_pop_internal to split it for
	-mfunction-return=.
	(simple_return_indirect_internal): Call
	ix86_output_indirect_function_return instead of
	ix86_output_indirect_jmp.

gcc/testsuite/

	PR target/84530
	* gcc.target/i386/ret-thunk-22.c: New test.
	* gcc.target/i386/ret-thunk-23.c: Likewise.
	* gcc.target/i386/ret-thunk-24.c: Likewise.
	* gcc.target/i386/ret-thunk-25.c: Likewise.
	* gcc.target/i386/ret-thunk-26.c: Likewise.

From-SVN: r257992

/cp
2018-02-26  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/84533
	* decl.c (redeclaration_error_message): Don't try to use
	DECL_DECLARED_CONSTEXPR_P on CONST_DECLs.

/testsuite
2018-02-26  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/84533
	* g++.dg/cpp1z/pr84533.C: New.

From-SVN: r257991

2018-02-26  Paolo Carlini  <paolo.carlini@oracle.com>

	* lambda.c (build_capture_proxy): Define static.
	* cp-tree.h (build_capture_proxy): Remove.

From-SVN: r257990

	PR bootstrap/84405
	* vec.h (vec_default_construct): For BROKEN_VALUE_INITIALIZATION use
	memset and value initialization afterwards.

From-SVN: r257989

	PR c++/84537
	* name-lookup.c (suggest_alternative_in_explicit_scope): Return false
	if name is error node.

	* g++.dg/parse/error60.C: New test.

From-SVN: r257988

2018-02-26  Christophe Lyon  <christophe.lyon@linaro.org>

	gcc/
	* Makefile.in (lto-wrapper): Use ALL_LINKERFLAGS.

From-SVN: r257987

	PR c++/84556
	* g++.dg/gomp/pr84556.C: New test.
	* g++.dg/vect/pr84556.cc: New test.

From-SVN: r257986

2018-02-26  Dominique d'Humieres <dominiq@gcc.gnu.org>

	PR fortran/32957
	* gfortran.dg/c_f_pointer_shape_tests_2.f03: Use explicit KIND c_int.
	* gfortran.dg/c_f_pointer_shape_tests_4.f03: Likewise.
	* gfortran.dg/c_funloc_tests_3.f03: Likewise.
	* gfortran.dg/c_loc_test.f90: Likewise.
	* gfortran.dg/c_loc_tests_2.f03: Likewise.
	* gfortran.dg/proc_decl_17.f90: Likewise.
	* gfortran.dg/proc_ptr_8.f90: Likewise.

From-SVN: r257985

This fixes a GCC-8 regression that we accidentally switched off frame
pointers in the AArch64 backend when changing the defaults in the common
parts of the code. This breaks an ABI decision that was made in GCC at
the dawn of the port with respect to having a frame pointer at all
times.  If we really want to turn this off lets have a discussion around
that separately.

For now turn this back on and I believe this will leave PR84521 latent
again with -fomit-frame-pointer and (hopefully) make the ruby issue go
away. I'm asking Sudi to pick that up.

Bootstrapped and regression tested on AArch64-none-linux-gnu but I see
one regression in gcc.c-torture/execute/960419-2.c which needs to be
looked at next (PR84528, thanks Kyrill).

Ok to put in and then look at PR84528 ?

2018-02-26  Ramana Radhakrishnan  <ramana.radhakrishnan@arm.com>

        PR target/84521
	* common/config/aarch64/aarch64-common.c
	(aarch_option_optimization_table[]): Switch
	off fomit-frame-pointer

2018-02-26  Ramana Radhakrishnan  <ramana.radhakrishnan@arm.com>

	PR target/84521
	* gcc.target/aarch64/lr_free_2.c: Revert changes in
	r254814 disabling -fomit-frame-pointer by default.
	* gcc.target/aarch64/spill_1.c: Likewise.
	* gcc.target/aarch64/test_frame_11.c: Likewise.
	* gcc.target/aarch64/test_frame_12.c: Likewise.
	* gcc.target/aarch64/test_frame_13.c: Likewise.
	* gcc.target/aarch64/test_frame_14.c: Likewise.
	* gcc.target/aarch64/test_frame_15.c: Likewise.
	* gcc.target/aarch64/test_frame_3.c: Likewise.
	* gcc.target/aarch64/test_frame_5.c: Likewise.
	* gcc.target/aarch64/test_frame_9.c: Likewise.

From-SVN: r257984

gcc/
	* config/nds32/nds32-multiple.md(load_multiple): Disallow
	volatile memory.
	(store_multiple): Ditto.

Co-Authored-By: Chung-Ju Wu <jasonwucj@gmail.com>

From-SVN: r257983

gcc/
	* config.gcc: Add --with-cpu support for nds32 target.
	* config/nds32/nds32-opts.h(nds32_cpu_type): New.
	* config/nds32/nds32.opt: Add -mcpu= option.

From-SVN: r257982

	* pt.c (rewrite_template_parm): Use tf_partial in first tsubst.

From-SVN: r257979

From-SVN: r257978

Some command-line options have been deprecated for a long time.  This
patch adds a warning for them, so that we can remove them in GCC 9
without surprising any users.


	* config/rs6000/rs6000.opt (mvrsave=no, mvrsave=yes, isel=no,
	isel=yes): Warn for these deprecated options.

From-SVN: r257975

re PR fortran/83633 (gfortran internal compiler error for explicit-shape array with non-constant bounds)

2018-02-25  Steven G. Kargl  <kargl@gcc.gnu.org>

	PR fortran/83633
	* decl.c (variable_decl): Check that an explicit-shape-array with
	nonconstant bounds is allowed.

2018-02-25  Steven G. Kargl  <kargl@gcc.gnu.org>

	PR fortran/83633
	* gfortran.dg/explicit_shape_1.f90: New test.
	* gfortran.dg/automatic_module_variable.f90: Update regex.
	* gfortran.dg/bad_automatic_objects_1.f90: Ditto.
	* gfortran.dg/constant_shape.f90: Ditto.
	* gfortran.dg/dec_structure_23.f90: Ditto.
	* gfortran.dg/pr78240.f90: Ditto.

From-SVN: r257971