The map field of a struct ptx_stream is a FIFO.  The FIFO is implemented as a
single linked list, with pop-from-the-front semantics.

The function map_pop pops an element, either by:
- deallocating the element, if there is more than one element
- or marking the element inactive, if there's only one element

The responsibility of map_push is to push an element to the back, as well as
selecting the element to push, by:
- allocating an element, or
- reusing the element at the front if inactive and big enough, or
- dropping the element at the front if inactive and not big enough, and
  allocating one that's big enough

The current implemention gets at least the first and most basic scenario wrong:

> map = cuda_map_create (size);

We create an element, and assign it to map.

> for (t = s->map; t->next != NULL; t = t->next)
>   ;

We determine the last element in the fifo.

> t->next = map;

We append the new element.

> s->map = map;

But here, we throw away the rest of the FIFO, and declare the FIFO to be just
the new element.

This problem causes the test-case asyncwait-1.c to fail intermittently on some
systems.  The pr87835.c test-case added here is a a minimized and modified
version of asyncwait-1.c (avoiding the kernel construct) that is more likely to
fail.

Fix this by rewriting map_pop more robustly, by:
- seperating the function in two phases: select element, push element
- when reusing or dropping an element, making sure that the element is cleanly
  popped from the queue
- rewriting the push element part in such a way that it can handle all cases
  without needing if statements, such that each line is exercised for each of
  the three cases.

2019-01-23  Tom de Vries  <tdevries@suse.de>

	PR target/87835
	* plugin/plugin-nvptx.c (map_push): Fix adding of allocated element.
	* testsuite/libgomp.oacc-c-c++-common/pr87835.c: New test.

From-SVN: r268176

gcc/testsuite/ChangeLog:

	* c-c++-common/Warray-bounds-2.c: Include headers only if they exist.
	* c-c++-common/Warray-bounds-3.c: Make xfails conditional on target
	non_strict_align.
	* c-c++-common/Wrestrict-2.c: Include headers only if they exist.
	* c-c++-common/Wrestrict.c: Make xfails conditional on target
	non_strict_align.

From-SVN: r268175

From-SVN: r268174

It is enabled at -O3, but the doc currently says -O2.  This fixes it.


	* doc/invoke.texi (-fsplit-paths): This is enabled by default at -O3.

From-SVN: r268170

2018-01-22  Steve Ellcey  <sellcey@marvell.com>

	c-c++-common/gomp/pr60823-1.c: Change aarch64-*-* target
	to aarch64*-*-* target.
	c-c++-common/gomp/pr60823-3.c: Ditto.
	g++.dg/gomp/declare-simd-1.C: Ditto.
	g++.dg/gomp/declare-simd-3.C: Ditto.
	g++.dg/gomp/declare-simd-4.C: Ditto.
	g++.dg/gomp/declare-simd-7.C: Ditto.
	g++.dg/gomp/pr88182.C: Ditto.
	gcc.dg/gomp/declare-simd-1.c: Ditto.
	gcc.dg/gomp/declare-simd-3.c: Ditto.
	gcc.dg/gomp/pr59669-2.c: Ditto.
	gcc.dg/gomp/pr87895-1.c: Ditto.
	gcc.dg/gomp/simd-clones-2.c: Ditto.
	gfortran.dg/gomp/declare-simd-2.f90: Ditto.
	gfortran.dg/gomp/pr79154-1.f90: Ditto.
	gfortran.dg/gomp/pr83977.f90: Ditto.

From-SVN: r268168

Fixes bootstrap regression introduced by the previous merge.

Reviewed-on: https://github.com/dlang/dmd/pull/9283

From-SVN: r268167

	PR target/88965
	* config/rs6000/rs6000.c: Include tree-vrp.h and tree-ssanames.h.
	(rs6000_gimple_fold_builtin): If MEM_REF address doesn't satisfy
	is_gimple_mem_ref_addr predicate, force it into a SSA_NAME first.

	* gcc.target/powerpc/pr88965.c: New test.

From-SVN: r268166

	PR middle-end/88968
	* gimplify.c (gimplify_omp_atomic): Handle bitfield atomics with
	non-integral DECL_BIT_FIELD_REPRESENTATIVEs.

	* c-omp.c (c_finish_omp_atomic): For bitfield atomics, update type
	variable after using BIT_FIELD_REF.

	* c-c++-common/gomp/atomic-23.c: New test.

From-SVN: r268165

	PR target/87064
	* config/rs6000/vsx.md (*vsx_reduc_<VEC_reduc_name>_v2df_scalar):
	Disable for little endian.

From-SVN: r268164

2019-01-22  Harald Anlauf  <anlauf@gmx.de>

	PR fortran/88579
	* trans-expr.c (gfc_conv_power_op): Handle cases of (2**e) ** integer
	and (- 2**e) ** integer.

2019-01-22  Harald Anlauf  <anlauf@gmx.de>

	PR fortran/88579
	* gfortran.dg/power_8.f90: New test.

From-SVN: r268163

2019-01-22  Sandra Loosemore  <sandra@codesourcery.com>

	gcc/testsuite/
	* g++.dg/lto/pr87906_0.C: Add dg-require-effective-target fpic.
	* g++.dg/vec-init-1.C: Likewise.
	* gcc.dg/pr87793.c: Likewise.

From-SVN: r268162

2019-01-22  Sandra Loosemore  <sandra@codesourcery.com>

	gcc/testsuite/
	* g++.dg/cpp0x/pr86397-1.C: Add -fdelete-null-pointer-checks.
	* g++.dg/cpp0x/pr86397-2.C: Likewise.

From-SVN: r268161

A bitfield that is exactly the same size as an integral type and
naturally aligned will have DECL_BIT_FIELD cleared.  So we need to
check DECL_BIT_FIELD_TYPE to be sure whether or not the underlying
type was declared with a bitfield declaration.

I've also added a test for bitfields that are based on overaligned types.

	PR target/88469
gcc:
	* config/arm/arm.c (arm_needs_double_word_align): Check
	DECL_BIT_FIELD_TYPE.

gcc/testsuite:
	* gcc.target/arm/aapcs/bitfield2.c: New test.
	* gcc.target/arm/aapcs/bitfield3.c: New test.

From-SVN: r268160

Fix a failing test - changes in Combine mean the test now fails
eventhough the generated code is the same.  Given there are several
AArch64-specific tests for vec-select, remove the scanning of Combine
output.  Committed as trivial fix.

    testsuite/
	PR rtl-optimization/87763
	* gcc.dg/vect/vect-nop-move.c: Fix testcase on AArch64.

From-SVN: r268159

There are

struct builtin_description
{
  const HOST_WIDE_INT mask;
  const enum insn_code icode;
  const char *const name;
  const enum ix86_builtins code;
  const enum rtx_code comparison;
  const int flag;
};

Since "mask" is used for both ix86_isa_flags and ix86_isa_flags2, buitins
with both flags can't be handled easily.  This patch adds mask2 to
builtin_description to handle it properly.

2019-01-22  Hongtao Liu  <hongtao.liu@intel.com>
	    H.J. Lu  <hongjiu.lu@intel.com>

	PR target/88909
	* config/i386/i386-builtin.def: Add mask2 to all builtin
	initializations.  Merge ARGS2 and SPECIAL_ARGS2 into ARGS and
	SPECIAL_ARGS.
	* config/i386/i386.c (BDESC): Add mask2 to the definition.
	(BDESC_FIRST): Likewise.
	(define_builtin): Add an argument for mask2.  Updated to handle
	both ix86_isa_flags and ix86_isa_flags2.
	(define_builtin_const): Likewise.
	(define_builtin_pure): Likewise.
	(define_builtin2): Deleted.
	(define_builtin_const2): Likewise.
	(builtin_description): Add a member, mask2.
	(bdesc_*): Add mask2 to builtin initializations.
	(ix86_init_mmx_sse_builtins): Update calls to def_builtin,
	def_builtin_const and def_builtin_pure.  Remove SPECIAL_ARGS2
	support.
	(ix86_get_builtin_func_type): Remove SPECIAL_ARGS2 support.

Co-Authored-By: H.J. Lu <hongjiu.lu@intel.com>

From-SVN: r268155

	PR libstdc++/88740
	* testsuite/util/testsuite_hooks.h [stderr] (VERIFY): Use fprintf to
	write to stderr instead of using printf.

From-SVN: r268154

    
    For the gofrontend copy, change calls to types.SizesFor to pass
    "gccgo" rather than "gc".  Leave the asmdecl pass unchanged since that
    pass is gc-specific anyhow.
    
    This has been fixed in a better way in the external repo by
    https://golang.org/cl/158317 and friends, but that is not in 1.12, so
    use this approach for now.
    
    Reviewed-on: https://go-review.googlesource.com/c/158842

From-SVN: r268153

With noplt attribute, we load the external function address via the GOT
slot so that linker won't create an PLT entry for extern function address.

gcc/

	PR target/88954
	* config/i386/i386.c (ix86_force_load_from_GOT_p): Also check
	noplt attribute.

gcc/testsuite/

	PR target/88954
	* gcc.target/i386/pr88954-1.c: New test.
	* gcc.target/i386/pr88954-2.c: Likewise.

From-SVN: r268152

Unfortunately another PCS bug has come to light with the layout of
structs whose alignment is dominated by a 64-bit bitfield element.
Such fields in the type list appear to have alignment 1, but in
reality, for the purposes of alignment of the underlying structure,
the alignment is derived from the underlying bitfield's type.  We've
been getting this wrong since support for over-aligned record types
was added several releases back.  Worse still, the existing code may
generate unaligned memory accesses that may fault on some versions of
the architecture.

I've taken the opportunity to add a few more tests that check the
passing arguments with overalignment in the PCS.  Looking through the
existing tests it looked like they were really only checking
self-consistency and not the precise location of the arguments.

PR target/88469

gcc:
	* config/arm/arm.c (arm_needs_doubleword_align): Return 2 if a record's
	alignment is dominated by a bitfield with 64-bit aligned base type.
	(arm_function_arg): Emit a warning if the alignment has changed since
	earlier GCC releases.
	(arm_function_arg_boundary): Likewise.
	(arm_setup_incoming_varargs): Likewise.

gcc/testsuite:
	* gcc.target/arm/aapcs/bitfield1.c: New test.
	* gcc.target/arm/aapcs/overalign_rec1.c: New test.
	* gcc.target/arm/aapcs/overalign_rec2.c: New test.
	* gcc.target/arm/aapcs/overalign_rec3.c: New test.

From-SVN: r268151

2019-01-22  Manfred Schwarb  <manfred99@gmx.ch>

	* gfortran.dg/array_function_5.f90: Fix a dg directive.
	* gfortran.dg/block_16.f08: Likewise.
	* gfortran.dg/dec_structure_14.f90: Likewise.
	* gfortran.dg/namelist_96.f90: Likewise.
	* gfortran.dg/newunit_5.f90.f90: Moved to
	* gfortran.dg/newunit_5.f90: here.
	* gfortran.dg/pdt_28.f03: Likewise.
	* gfortran.dg/spread_simplify_1.f90: Likewise.

From-SVN: r268148

2019-01-22  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/88862
	* graphite-scop-detection.c
	(scop_detection::graphite_can_represent_scev): Reject ADDR_EXPR.

From-SVN: r268147

2019-01-22  Andrew Stubbs  <ams@codesourcery.com>

	* doc/extend.tex (AMD GCN Function Attributes): New section.
	* doc/install.texi (amdgcn-unknown-amdhsa): New instructions.
	* doc/invoke.texi (AMD GCN Options): New section.
	* doc/md.texi (Constraints for Particular Machines): Add AMD GCN.

From-SVN: r268146

sparc.c (parc_delegitimize_address): Recognize the GOT register and decoded HIGH/LO_SUM combinations for labels in...

	* config/sparc/sparc.c (parc_delegitimize_address): Recognize the GOT
	register and decoded HIGH/LO_SUM combinations for labels in PIC mode.

From-SVN: r268145

gcc/testsuite/ChangeLog:

	PR/tree-optimization 88903
	* gcc.dg/vect/pr88903-1.c: Add explicit &.

From-SVN: r268144

	PR tree-optimization/88044
	* tree-ssa-loop-niter.c (number_of_iterations_cond): If condition
	is false in the first iteration, but !every_iteration, return false
	instead of true with niter->niter zero.

From-SVN: r268143

re PR lto/88422 (collect2.exe: fatal error: lto-wrapper returned 1 exit status: file not recognized: file truncated)

2019-01-22  Nidal Faour  <nidal.faour@wdc.com>

	PR lto/88422
	* simple-object.c (O_BINARY): Define if not already defined.
	(simple_object_copy_lto_debug_sections): Create file in binary
	mode.

From-SVN: r268141

	PR rtl-optimization/88904
	* cfgcleanup.c (thread_jump): Verify cond2 doesn't mention
	any nonequal registers before processing BB_END (b).

	* gcc.c-torture/execute/pr88904.c: New test.

From-SVN: r268140

	PR target/88905
	* optabs.c (add_equal_note): Add op0_mode argument, use it instead of
	GET_MODE (op0).
	(expand_binop_directly, expand_doubleword_clz,
	expand_doubleword_popcount, expand_ctz, expand_ffs,
	expand_unop_direct, maybe_emit_unop_insn): Adjust callers.

	* gcc.dg/pr88905.c: New test.

From-SVN: r268139

	PR rtl-optimization/49429
	PR target/49454
	PR rtl-optimization/86334
	PR target/88906
	* expr.c (emit_block_move_hints): Move marking of MEM_EXPRs
	addressable from here...
	(emit_block_op_via_libcall): ... to here.

	* gcc.target/i386/pr86334.c: New test.
	* gcc.target/i386/pr88906.c: New test.

From-SVN: r268138

2019-01-22  Richard Biener  <rguenther@suse.de>

	* tree-vect-loop.c (vect_analyze_loop_operations): Use
	auto_vec for cost vector to fix memleak.
	(vectorize_fold_left_reduction): Properly gather SLP defs.
	(vectorizable_comparison): Do not swap operands to properly
	gather SLP defs.

From-SVN: r268137

ChangLog:

2019-01-21  Jiufu Guo  <guojiufu@linux.ibm.com>

        * MAINTAINERS (Write After Approval): Add myself.

From-SVN: r268136

The direct cause of this PR is the fact that tls_gdld_nomark didn't
handle indirect calls.  Also, most indirect calls were being optimised
back to direct calls anyway, due to tls_gdld_nomark not checking any
of the parallel elements except the first (plus the extra element that
distinguishes this call from normal calls).  There were other unwanted
substitutions too.

So this patch attacks the problem of handling special calls in a
different way.  Rather than adding another element to the call insn
parallel to distinguish -mno-tls-markers __tls_get_addr calls from any
other calls, we now inspect the second CALL arg.  Each
call_value_nonlocal and call_value_indirect insn now checks for the
tlsgd/ld unspecs when !TARGET_TLS_MARKERS and emits the arg setup
insns.  I disallow the local call patterns since we'll only see local
calls to __tls_get_addr in testcases, and it doesn't seem a good idea
to complicate the patterns just for a minor optimisation.  Sibling
call insns aren't used for libcalls, so none of these insns need to
change.

The patch also fixes a minor problem with -mno-tls-markers
__tls_get_addr calls causing a "li 3,0" instruction to be emitted
prior to the arg setup instructions, due to using a libcall with one
arg.  That isn't correct when the call insn itself sets up its arg.
Also, I've tidied the V4 secure-plt calls, generating them in
rs6000_call_sysv rather than by splitting in rs6000.md.  The
CALL_INSN_FUNCTION_USAGE added in edit_tls_call_insn is no longer
needed (since git commit 0a4b5c66df9).

On the subject of unwanted substitutions, I also saw a
_GLOBAL_OFFSET_TABLE_ symbol_ref being substituted for the GOT reg,
resulting in code like "addi 3,_GLOBAL_OFFSET_TABLE_,tls_ld@got@tlsld".
Fixed by the unspec_tls change.

	PR target/88614
	* config/rs6000/predicates.md (unspec_tls): Ensure GOT reg
	stays a reg.  Allow a const_int.
	* config/rs6000/rs6000-protos.h (rs6000_output_tlsargs): Declare.
	* config/rs6000/rs6000.h (IS_V4_FP_ARGS): Define.
	(IS_NOMARK_TLSGETADDR): Define.
	* config/rs6000/rs6000.c (edit_tls_call_insn): Delete.
	(rs6000_output_tlsargs): New function.
	(rs6000_legitimize_tls_address): Don't say a !TARGET_TLS_MARKERS
	__tls_get_addr call takes an arg.
	(rs6000_call_sysv): Generate sysv4 secure plt call pattern here..
	* config/rs6000/rs6000.md (call_nonlocal_sysv): ..rather than here,
	delete split..
	(call_value_nonlocal_sysv): ..or here, delete split.
	(tls_gdld_nomark): Delete.
	(call_value_indirect_nonlocal_sysv): Use unspec_tls as operand2
	predicate.  Call rs6000_output_tlsargs.  Adjust length to suit.
	(call_value_nonlocal_sysv): Likewise.
	(call_value_nonlocal_sysv_secure): Likewise.
	(call_value_nonlocal_aix): Likewise.
	(call_value_indirect_aix): Likewise.
	(call_value_indirect_elfv2): Likewise.
	(call_value_local32, call_value_local64): Disable for no-mark tls.
	(call_value_local_aix): Likewise.

From-SVN: r268135

From-SVN: r268134

	PR go/88927
    runtime, internal/cpu: fix build for ARM GNU/Linux
    
    Was failing with
    
    ../../../libgo/go/internal/cpu/cpu.go:138:2: error: reference to undefined name 'doinit'
      138 |  doinit()
          |  ^
    
    Fix it by adding in Go 1.12 internal/cpu/cpu_arm.go, and the code in
    runtime that initializes the values.
    
    Fixes https://gcc.gnu.org/PR88927.
    
    Reviewed-on: https://go-review.googlesource.com/c/158717

From-SVN: r268131

    
    Restore some of the fixes that were applied to golang_org/x/net/lif
    but were lost when 1.12 moved the directory to internal/x/net/lif.
    
    Add support for reading /proc to fetch argc/argv/env for c-archive mode.
    
    Reviewed-on: https://go-review.googlesource.com/c/158640

From-SVN: r268130

    
    If there is an error reading or parsing an archive header, the
    Archive_iterator code would return a dummy header but would not mark
    itself as done.  The effect is that an invalid archive leads to an
    endless loop reading and re-reading the same archive header.  Avoid
    that by setting the offset to the end of the file, which will cause
    the iterator to == archive_end.
    
    No test since it doesn't seem worth constructing an invalid archive.
    
    Reviewed-on: https://go-review.googlesource.com/c/158217

From-SVN: r268129

	PR c++/88949
	* optimize.c (cxx_copy_decl): New function.
	(clone_body): Use it instead of copy_decl_no_change.

	* g++.dg/gomp/pr88949.C: New test.

From-SVN: r268127

	* Fix a typo in the previous commit.

From-SVN: r268126

2019-01-21  Manfred Schwarb  <manfred99@gmx.ch>

	* class_66.f90: Fix a dg directive.
	* debug/pr35154-stabs.f: Likewise.
	* dec_d_lines_3.f: Likewise.
	* dec_d_lines_3.f: Likewise.
	* dec_structure_12.f90: Likewise.
	* dec_structure_15.f90: Likewise.
	* deferred_character_31.f90: Likewise.
	* dtio_31.f03: Likewise.
	* dtio_32.f03: Likewise.
	* extends_11.f03: Likewise.
	* integer_plus.f90: Likewise.
	* pdt_25.f03: Likewise.
	* pr58968.f: Likewise.
	* pr78259.f90: Likewise.
	* vect/vect-2.f90: Likewise.
	* matmul_const.f90: Likewise.

From-SVN: r268125

Reduces the memory footprint of the CTFE interpreter by replacing new
with emplacement new in many places.

gcc/d/ChangeLog:

2019-01-21  Iain Buclaw  <ibuclaw@gdcproject.org>

	* d-frontend.cc (Compiler::paintAsType): Update for new signature.

From-SVN: r268124