New LRA algorithms require the all the register constraints to be
defined using define_register_constraint keyword. However, Rs5
constraint was not LRA proof. Remove it and replace it by equivalent
Rcd constraint.

gcc/
xxxx-xx-xx  Claudiu Zissulescu  <claziss@synopsys.com>

	* config/arc/arc.md (sibcall_insn): Use Rcd constraint.
	(sibcall_value_insn): Likewise.
	* config/arc/constraints.md (Rs5): Remove.

From-SVN: r270386

gcc/
xxxx-xx-xx  Claudiu Zissulescu  <claziss@synopsys.com>

        * config/arc/arc.c (arc_hard_regno_modes): Add two missing modes
        for last two fake registers.
        (arc_conditional_register_usage): Make sure fake frame and arg
        pointer regs are in general regs class.
        (FRAME_POINTER_MASK): Remove.
        (RETURN_ADDR_MASK): Remove.
        (arc_must_save_register): Use hard frame regnum.
        (frame_restore_reg): Use hard_frame_pointer_rtx.
        (arc_save_callee_saves): Likewise.
        (arc_restore_callee_saves): Likewise.
        (arc_save_callee_enter): Likewise.
        (arc_restore_callee_leave): Likewise.
        (arc_save_callee_milli): Likewise.
        (arc_eh_return_address_location): Likewise.
        (arc_check_multi): Use hard frame regnum.
        (arc_can_eliminate): Likewise.
        * config/arc/arc.h (FIXED_REGISTERS): Make FP register available
        for register allocator.
        (REG_CLASS_CONTENTS): Update GENERAL_REGS.
        (REGNO_OK_FOR_BASE_P): Consider FRAME_POINTER_REGNUM.
        (FRAME_POINTER_REGNUM): Change it to a fake register.
        (HARD_FRAME_POINTER_REGNUM): Defined.
        (ARG_POINTER_REGNUM): Change it to a new fake register.
        (ELIMINABLE_REGS): Update.
        (REGISTER_NAMES): Update names.
        * config/arc/arc.md (LP_START): Remove.
        (LP_END): Likewise.
        (shift_si3_loop): Update pattern.

From-SVN: r270385

1.The delay slot scheduler can reschedule some of the frame related
instructions resulting in having incorect CFI information. This patch
introduces a schedule blockage to avoid this problem.

2.There are cases when an interrupt may happen and not all the current
function stack operations are done, which may result in stack
corruption. Such an example is accessing an returning a local
structure members, which members are allocated on stack. The stack
adjustment and the accessing of the struct member can be reorder as
they may not use both the SP register for the access.

3.Also, do not save/restore SP when in interrupt. The SP is switch by
the core IRQ machinery.

gcc/
xxxx-xx-xx  Claudiu Zissulescu  <claziss@synopsys.com>

	* config/arc/arc.c (arc_expand_prologue): Emit blockage regardless
	to avoid delay slot scheduling.
	(arc_must_save_register): Don't save SP.
	* config/arc/arc.md (stack_tie): Remove.
	(UNSPEC_ARC_STKTIE): Likewise.

From-SVN: r270384

gcc/
	* config/nds32/nds32-md-auxiliary.c (nds32_split_ashiftdi3): Fix wrong
	code gen with large shift amount.

Co-Authored-By: Shiva Chen <shiva0217@gmail.com>

From-SVN: r270383

gcc/
	* config/nds32/nds32-pipelines-auxiliary.c (wext_odd_dep_p): Handle
	subreg.

From-SVN: r270382

	PR target/90096
	* config/i386/i386.c (ix86_target_string): Add ADD_ABI_P argument, only
	print -m64/-mx32/-m32 if it is true.
	(ix86_debug_options, ix86_function_specific_print): Pass true as
	ADD_ABI_P to ix86_target_string.
	(ix86_expand_builtin): Adjust ix86_target_string caller, pass true as
	ADD_ABI_P only if OPTION_MASK_ISA_64BIT is set in bisa and in that case
	or into it OPTION_MASK_ISA_ABI_64 or OPTION_MASK_ISA_ABI_X32.

	* gcc.target/i386/pr90096.c: New test.
	* gcc.target/i386/pr69255-1.c: Adjust expected diagnostics.
	* gcc.target/i386/pr69255-2.c: Likewise.
	* gcc.target/i386/pr69255-3.c: Likewise.

From-SVN: r270381

	PR rtl-optimization/90082
	* dce.c (can_delete_call): New function.
	(deletable_insn_p, mark_insn): Use it.

	* gcc.dg/pr90082.c: New test.

From-SVN: r270380

	PR tree-optimization/90090
	* tree-ssa-math-opts.c (is_division_by): Ignore divisions that can
	throw internally.
	(is_division_by_square): Likewise.  Formatting fix.

	* g++.dg/opt/pr90090.C: New test.

From-SVN: r270379

2019-04-16  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/56049
	* tree-ssa-loop-im.c (mem_ref_hasher::equal): Elide alias-set
	equality check if alias-set zero will prevail.

	* gfortran.dg/pr56049.f90: New testcase.

From-SVN: r270378

libphobos/ChangeLog:

2019-04-16  Iain Buclaw  <ibuclaw@gdcproject.org>

	* config.h.in: Regenerate.
	* configure: Regenerate.
	* m4/druntime/libraries.m4 (DRUNTIME_LIBRARIES_BACKTRACE): Set
	CPPFLAGS correctly for backtrace support test.

From-SVN: r270377

From-SVN: r270376

	* config/microblaze/microblaze.c (microblaze_expand_block_move): Treat
	size and alignment as unsigned.

From-SVN: r270373

	PR d/90059
	PR d/90060
	PR d/90062
libphobos: Merge upstream druntime 70b9fea6

Backports fixes in the extern(C) bindings for the Solaris/SPARC port.

Initial patch by Rainer Orth.

Reviewed-on: https://github.com/dlang/druntime/pull/2555

From-SVN: r270372

2019-04-15  Richard Biener  <rguenther@suse.de>

	PR debug/90074
	* tree-loop-distribution.c (destroy_loop): Preserve correct
	debug info.

	* gcc.dg/guality/pr90074.c: New testcase.

From-SVN: r270370

2019-04-15  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/90071
	* tree-ssa-reassoc.c (init_range_entry): Do not pick up
	abnormal operands from def stmts.

	* gcc.dg/torture/pr90071.c: New testcase.

From-SVN: r270369

The code that checks if an auto-increment from i0 or i1 is not lost is
a bit shaky.  The code to check the same for i2 is non-existent, and
cannot be implemented in a similar way at all.  So, this patch counts
all auto-increments, and makes sure we end up with the same number as
we started with.  This works because we still have a check that we
will not duplicate any.

We should do this some better way, but not while we are in stage 4.


	PR rtl-optimization/89794
	* combine.c (count_auto_inc): New function.
	(try_combine): Count how many auto_inc expressions there were in the
	original instructions.  Ensure we have the same number in the new
	instructions.  Remove the code that tried to ensure auto_inc side
	effects on i1 and i0 are not lost.

gcc/testsuite/
	PR rtl-optimization/89794
	* gcc.dg/torture/pr89794.c: New testcase.

From-SVN: r270368

2019-04-15  Richard Biener  <rguenther@suse.de>

	PR ipa/88936
	* tree.h (auto_var_p): Declare.
	* tree.c (auto_var_p): New function, split out from ...
	(auto_var_in_fn_p): ... here.
	* tree-ssa-structalias.c (struct variable_info): Add shadow_var_uid
	member.
	(new_var_info): Initialize it.
	(set_uids_in_ptset): Also set the shadow variable uid if required.
	(ipa_pta_execute): Postprocess points-to solutions assigning
	shadow variable uids for locals that may reach their containing
	function recursively.
	* tree-ssa-ccp.c (fold_builtin_alloca_with_align): Do not
	assert but instead check whether the points-to solution is
	a singleton.

	* gcc.dg/torture/pr88936-1.c: New testcase.
	* gcc.dg/torture/pr88936-2.c: Likewise.
	* gcc.dg/torture/pr88936-3.c: Likewise.

From-SVN: r270366

2019-04-15  Martin Jambor  <mjambor@suse.cz>

	PR ipa/pr89693
	* cgraph.c (clone_of_p): Loop over clone chain for each step in
	the thunk chain.

	testsuite/
	* g++.dg/ipa/pr89693.C: New test.

From-SVN: r270364

libgcc/
	* config/nds32/linux-unwind.h (SIGRETURN): Remove.
	(RT_SIGRETURN): Update.
	(nds32_fallback_frame_state): Update.

From-SVN: r270363

gcc/
	* config.gcc (nds32*-*-linux*): Set gcc_cv_initfini_array to yes.

From-SVN: r270362

gcc/
	* config/nds32/nds32-md-auxiliary.c
	(nds32_legitimize_pic_address): Use new PIC pattern.
	(nds32_legitimize_tls_address): Use new TLS pattern.
	(nds32_output_symrel): New.
	* config/nds32/nds32-protos.h (nds32_output_symrel): Declare.
	(nds32_alloc_relax_group_id): Ditto.
	* config/nds32/nds32-relax-opt.c (nds32_alloc_relax_group_id): New.
	(nds32_group_insns): Use nds32_alloc_relax_group_id instead of use
	relax_group_id.
	(nds32_group_tls_insn): Ditto.
	(nds32_group_float_insns): Ditto.
	* config/nds32/nds32.md (tls_le): New.
	(sym_got): Ditto.

Co-Authored-By: Kito Cheng <kito.cheng@gmail.com>
Co-Authored-By: Shiva Chen <shiva0217@gmail.com>

From-SVN: r270361

2019-04-15  Dominique d'Humieres  <dominiq@gcc.gnu.org>

	PR tree-optimization/90020
	* gcc.dg/torture/pr90020.c: Add linker options for darwin.

From-SVN: r270360

[NDS32] Provide one valid nds32 assembly instruction to check assembler debugging options and features.

gcc/
	* configure: Add nds32 target for dwarf2 debug_line checking.
	* configure.ac: Regenerated.

From-SVN: r270359

From-SVN: r270358

	PR lto/89358
	* g++.dg/lto/pr89358_0.C: New testcase.
	* g++.dg/lto/pr89358_1.C: New testcase.
	* ipa-devirt.c (skip_in_fields_list_p): New.
	(odr_types_equivalent_p): Use it.

From-SVN: r270355

2019-04-14  Thomas Koenig  <tkoenig@gcc.gnu.org>

    PR fortran/85448
    * gfortran.dg/bind_c_usage_33.f90: New test and...
    * gfortran.dg/bind_c_usage_33_c.c: Additional source.

From-SVN: r270354

2019-04-14  Paul Thomas  <pault@gcc.gnu.org>

	PR fortran/89843
	* trans-decl.c (gfc_get_symbol_decl): Assumed shape and assumed
	rank dummies of bind C procs require deferred initialization.
	(convert_CFI_desc): New procedure to convert incoming CFI
	descriptors to gfc types and back again.
	(gfc_trans_deferred_vars): Call it.
	* trans-expr.c (gfc_conv_gfc_desc_to_cfi_desc): Null the CFI
	descriptor pointer. Free the descriptor in all cases.

	PR fortran/89846
	* expr.c (is_CFI_desc): New function.
	(is_subref_array): Tidy up by referencing the symbol directly.
	* gfortran.h : Prototype for is_CFI_desc.
	* trans_array.c (get_CFI_desc): New function.
	(gfc_get_array_span, gfc_conv_scalarized_array_ref,
	gfc_conv_array_ref): Use it.
	* trans.c (get_array_span): Extract the span from descriptors
	that are indirect references.

	PR fortran/90022
	* trans-decl.c (gfc_get_symbol_decl): Make sure that the se
	expression is a pointer type before converting it to the symbol
	backend_decl type.
	* trans-expr.c (gfc_conv_gfc_desc_to_cfi_desc): Eliminate
	temporary creation for intent(in).

2019-04-14  Paul Thomas  <pault@gcc.gnu.org>

	PR fortran/89843
	* gfortran.dg/ISO_Fortran_binding_4.f90: Modify the value of x
	in ctg. Test the conversion of the descriptor types in the main
	program.
	* gfortran.dg/ISO_Fortran_binding_10.f90: New test.
	* gfortran.dg/ISO_Fortran_binding_10.c: Called by it.

	PR fortran/89846
	* gfortran.dg/ISO_Fortran_binding_11.f90: New test.
	* gfortran.dg/ISO_Fortran_binding_11.c: Called by it.

	PR fortran/90022
	* gfortran.dg/ISO_Fortran_binding_1.c: Correct the indexing for
	the computation of 'ans'. Also, change the expected results for
	CFI_is_contiguous to comply with standard.
	* gfortran.dg/ISO_Fortran_binding_1.f90: Correct the expected
	results for CFI_is_contiguous to comply with standard.
	* gfortran.dg/ISO_Fortran_binding_9.f90: New test.
	* gfortran.dg/ISO_Fortran_binding_9.c: Called by it.

2019-04-14  Paul Thomas  <pault@gcc.gnu.org>

	PR fortran/89843
	* runtime/ISO_Fortran_binding.c (cfi_desc_to_gfc_desc): Only
	return immediately if the source pointer is null. Bring
	forward the extraction of the gfc type. Extract the kind so
	that the element size can be correctly computed for sections
	and components of derived type arrays. Remove the free of the
	CFI descriptor since this is now done in trans-expr.c.
	(gfc_desc_to_cfi_desc): Only allocate the CFI descriptor if it
	is not null.
	(CFI_section): Normalise the difference between the upper and
	lower bounds by the stride to correctly calculate the extents
	of the section.

	PR fortran/89846
	* runtime/ISO_Fortran_binding.c (cfi_desc_to_gfc_desc): Use
	the stride measure for the gfc span if it is not a multiple
	of the element length. Otherwise use the element length.

	PR fortran/90022
	* runtime/ISO_Fortran_binding.c (CFI_is_contiguous) : Return
	1 for true and 0 otherwise to comply with the standard. Correct
	the contiguity check for rank 3 and greater by using the stride
	measure of the lower dimension rather than the element length.

From-SVN: r270353

PR d/87799
* d-system.h (_mkdir): Forward _mkdir on MinGW to mkdir in system.h.
* configure.ac: Remove d from unsupported languages on mingw and cygwin.
* configure: Regenerate.

From-SVN: r270349

	toplevel:
	* configure.ac (enable_libphobos): Check LIBPHOBOS_SUPPORTED.
	* configure: Regenerate.

	libphobos:
	* configure.tgt (LIBPHOBOS_SUPPORTED): Default to no.
	Set to yes explicitly.
	* configure.ac: Handle --enable-libphobos.
	(x86_64-*-solaris2.* | i?86-*-solaris2.*): Only mark supported
	with gas.
	(ENABLE_LIBPHOBOS): New conditional.
	* configure: Regenerate.
	* Makefile.am (SUBDIRS): Only set if ENABLE_LIBPHOBOS.
	* Makefile.in: Regenerate.

From-SVN: r270348

2019-04-14  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
	    Iain Buclaw  <ibuclaw@gdcproject.org>

	PR d/88150
	* m4/druntime/os.m4 (DRUNTIME_OS_DLPI_TLS_MODID): New macro.
	* configure.ac: Use it.
	Call AC_USE_SYSTEM_EXTENSIONS.
	* configure: Regenerate.
	* Makefile.in, libdruntime/Makefile.in, src/Makefile.in,
	testsuite/Makefile.in: Regenerate.
	* libdruntime/gcc/config.d.in (OS_Have_Dlpi_Tls_Modid): Define.
	* libdruntime/gcc/sections/elf_shared.d: Import gcc.config.
	(scanSegments) <PT_TLS> [OS_Have_Dlpi_Tls_Modid]: Use
	dlpi_tls_modid.
	[Solaris]: Use dlinfo(RTLD_DI_LINKMAP) to get rt_tlsmodid.
	Otherwise clear pdso._tlsMod, pdso._tlsSize.
	(getTLSRange) [Solaris && !OS_Have_Dlpi_Tls_Modid]: Readjust mod.

Co-Authored-By: Iain Buclaw <ibuclaw@gdcproject.org>

From-SVN: r270347

	* m4/druntime/os.m4 (DRUNTIME_OS_LINK_SPEC): New macro.
	* configure.ac: Call it.
	* configure: Regenerate.
	* Makefile.in, libdruntime/Makefile.in, src/Makefile.in,
	testsuite/Makefile.in: Regenerate.
	* src/libgphobos.spec.in (*link): Append OS_LINK_SPEC.

From-SVN: r270346

	PR d/88150
	* libdruntime/gcc/sections/elf_shared.d [Solaris] (SharedELF): Set
	to true.
	Import core.sys.solaris.dlfcn, core.sys.solaris.link,
	core.sys.solaris.sys.elf, core.sys.solaris.sys.link.
	(dummy_ref): Declare.
	(initSections): Initialize dummy_ref.
	(getDependencies): Set strtab.
	(handleForName): Don't dlclose handle.
	(findDSOInfoForAddr): Set IterateManually.
	(getprogname): Declare.
	(progname): Use it.
	* libdruntime/gcc/sections/package.d [Solaris]: Import
	gcc.sections.elf_shared instead of gcc.sections.solaris.
	* libdruntime/gcc/sections/solaris.d: Remove.
	* libdruntime/Makefile.am (DRUNTIME_DSOURCES): Remove
	gcc/sections/solaris.d.

From-SVN: r270345

From-SVN: r270344

These modules depend on a mixture between how the compiler emits
run-time module information, and what functions are exposed by the
platform to inquire about loaded global and thread-local data sections.

As the upstream implementation is written to work only with how the
reference D compiler writes out data, much of what is present does not
apply to the GCC D front-end.  So it has been moved to a non-upstream
location in the source tree, where most of it will be rewritten once
each port has been completed.

The only tested module sections/elf_shared.d has been cleaned up so that
all deprecated declarations have been removed, as well as the brittle
module collision checking, which required bss_sections.c.  All other
ports have been left unchanged apart from a commonizing of attributes.

libphobos/ChangeLog:

2019-04-13  Iain Buclaw  <ibuclaw@gdcproject.org>

	* libdruntime/Makefile.am (DRUNTIME_CSOURCES): Remove bss_sections.c.
	(DRUNTIME_DSOURCES): Rename rt/sections_* modules to gcc/sections/*.
	* libdruntime/Makefile.in: Regenerate.
	* libdruntime/gcc/sections/android.d: New file.
	* libdruntime/gcc/sections/elf_shared.d: New file.
	* libdruntime/gcc/sections/osx.d: New file.
	* libdruntime/gcc/sections/package.d: New file.
	* libdruntime/gcc/sections/solaris.d: New file.
	* libdruntime/gcc/sections/win32.d: New file.
	* libdruntime/gcc/sections/win64.d: New file.
	* libdruntime/rt/bss_section.c: Remove.
	* libdruntime/rt/sections.d: Publicly import gcc.sections.
	* libdruntime/rt/sections_android.d: Remove.
	* libdruntime/rt/sections_elf_shared.d: Remove.
	* libdruntime/rt/sections_osx.d: Remove.
	* libdruntime/rt/sections_solaris.d: Remove.
	* libdruntime/rt/sections_win32.d: Remove.
	* libdruntime/rt/sections_win64.d: Remove.

From-SVN: r270341

From-SVN: r270340

	PR target/89093
	* config/arm/arm.c (arm_valid_target_attribute_rec): Use strcmp
	instead of strncmp when checking for thumb and arm.  Formatting fixes.

	* gcc.target/arm/pr89093.c: New test.

From-SVN: r270339

2019-04-13  Dominique d'Humieres  <dominiq@gcc.gnu.org>

	PR fortran/79842
	* module.c (gfc_use_module): use complete sentences.

From-SVN: r270338

From-SVN: r270337

    
    Resolve a small problem with concatenation of string constants: in a
    string concat X + Y where X has named type and Y has abstract string
    type, insure that the result has X's type, and disable folding if the
    both sides have a concrete type that does not match.
    
    Fixes golang/go#31412.
    
    Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/171797

From-SVN: r270336

From-SVN: r270335