The class API provides no way to modify the members, so we can share
them between copies of the same object. Copying becomes a simple
reference count update, which doesn't throw.
Also adjust the what() string to allow distinguishing between an empty
path passed to the constructor, and no path.
PR libstdc++/83306
* include/bits/fs_path.h (filesystem_error): Move data members into
pimpl class owned by shared_ptr. Remove inline definitions of member
functions.
* src/filesystem/std-path.cc (filesystem_error::_Impl): Define.
(filesystem_error): Define member functions.
* testsuite/27_io/filesystem/filesystem_error/cons.cc: New test.
* testsuite/27_io/filesystem/filesystem_error/copy.cc: New test.
From-SVN: r266565
If the allocation of abbrevs->abbrevs in read_abbrevs fails, then
abbrevs->num_abbrevs remains nonzero, and consequently free_abbrevs will
segfault when accessing abbrevs->abbrevs.
Fix this by setting abbrevs->num_abbrevs only after abbrevs->abbrevs
allocation has succeeded.
Bootstrapped and reg-tested on x86_64.
2018-11-28 Tom de Vries <tdevries@suse.de>
* dwarf.c (read_abbrevs): Fix handling of abbrevs->abbrevs allocation
failure.
From-SVN: r266562
2018-11-28 Richard Biener <rguenther@suse.de>
PR tree-optimization/88223
* tree-ssa-sccvn.c (vn_reference_lookup_3): When skipping
over a stored-same value may-alias store make sure to consider
partial overlaps which are valid when TBAA reasonings do not
apply and byte-granular overlaps are possible at all.
* gcc.dg/torture/pr88223.c: New testcase.
From-SVN: r266560
2018-11-28 Richard Biener <rguenther@suse.de>
PR tree-optimization/88217
* vr-values.c (vr_values::extract_range_from_phi_node): Make
sure to handle results > +INF and < -INF correctly when
trying to drop down to +INF - 1 or -INF + 1.
* g++.dg/pr88217.C: New testcase.
From-SVN: r266557
git commit 41f70262f (svn rev 264868) exposed a signed/unsigned
comparison. Fixed by matching the type of the local var to that of
the tree field.
* xcoffout.c (do_block): Signed/unsigned warning fix.
From-SVN: r266555
PR testsuite/85368
* gcc.dg/tree-ssa/phi-opt-11.c: For branch_cost targets, expect 0 ifs
rather than 0 or 2 depending on logical_op_short_circuit.
From-SVN: r266552
2018-11-28 Richard Biener <rguenther@suse.de>
PR tree-optimization/79351
* tree-ssa-sccvn.c (vn_reference_lookup_3): For assignments from
empty CONSTRUCTORs ensure the store is at a constant position.
* gcc.dg/torture/pr79351.c: New testcase.
From-SVN: r266551
2018-11-28 Richard Biener <rguenther@suse.de>
PR tree-optimization/88229
* tree-ssa.c (non_rewritable_mem_ref_base): Check DECL_SIZE_UNIT
is an INTEGER_CST before accessing it so.
From-SVN: r266550
PR target/88189
* config/i386/i386.c (ix86_expand_sse_movcc): Handle DFmode and
SFmode using sse4_1_blendvs[sd] with TARGET_SSE4_1. Formatting fixes.
* config/i386/sse.md (sse4_1_blendv<ssemodesuffix>): New pattern.
* gcc.target/i386/sse4_1-pr88189-1.c: New test.
* gcc.target/i386/sse4_1-pr88189-2.c: New test.
* gcc.target/i386/avx-pr88189-1.c: New test.
* gcc.target/i386/avx-pr88189-2.c: New test.
From-SVN: r266548
PR c++/87476
* typeck2.c (digest_init_r): Re-add handing of signed/unsigned char
strings and add it to the initialization of wide array from non-wide
string diagnostics too.
* g++.dg/cpp0x/pr87476-1.C: New test.
* g++.dg/cpp0x/pr87476-2.C: New test.
From-SVN: r266547
PR c++/88215
* c-ubsan.c: Include langhooks.h.
(ubsan_instrument_division): Change gcc_assert that main variants
of op0 and op1 types are equal to gcc_checking_assert that the
main variants are compatible types.
* c-c++-common/ubsan/pr88215.c: New test.
From-SVN: r266546
2018-10-19 Richard Biener <rguenther@suse.de>
PR tree-optimization/88182
* g++.dg/gomp/pr88182.C: Move from libgomp and use -fopenmp-simd.
* testsuite/libgomp.c++/pr88182.C: Move to g++.dg/gomp.
From-SVN: r266545
Track whether we've seen an error when importing a function; we will
use error tracking to avoid knock-on errors.
Stop importing identifiers at a ')'.
Provide a way to adjust the indentation level while importing.
Reviewed-on: https://go-review.googlesource.com/c/150072
From-SVN: r266536
* testsuite/27_io/filesystem/operations/canonical.cc: Remove
directory created by test.
* testsuite/27_io/filesystem/operations/symlink_status.cc: Remove
symlink created by test.
From-SVN: r266535
Inlinable function bodies are generated after the determine_types pass,
so we know the type for all constants. Rather than try to determine
it again when inlining, record the type in the export data, using a
$convert expression. Reduce the number of explicit $convert
expressions by recording a type context with the expected type in
cases where that type is known.
Reviewed-on: https://go-review.googlesource.com/c/150071
From-SVN: r266534
This resolves a longstanding issue where the lock policy for shared_ptr
reference counting depends on compilation options when the header is
included, so that different -march options can cause ABI changes. For
example, objects compiled with -march=armv7 will use atomics to
synchronize reference counts, and objects compiled with -march=armv5t
will use a mutex. That means the shared_ptr control block will have a
different layout in different objects, causing ODR violations and
undefined behaviour. This was the root cause of PR libstdc++/42734 as
well as PR libstdc++/67843.
The solution is to decide on the lock policy at build time, when
libstdc++ is configured. The configure script checks for the
availability of the necessary atomic built-ins for the target and fixes
that choice permanently. Different -march flags used to compile user
code will not cause changes to the lock policy. This results in an ABI
change for certain compilations, but only where there was already an ABI
incompatibility between the libstdc++.so library and objects built with
an incompatible -march option. In general, this means a more stable ABI
that isn't silently altered when -march flags make addition atomic ops
available.
To force a target to use "atomic" or "mutex" the new configure option
--with-libstdcxx-lock-policy can be used.
In order to turn ODR violations into linker errors, the uses of
shared_ptr in filesystem directory iterators have been replaced
with __shared_ptr, and explicit instantiations are declared. This
ensures that object files using those types cannot link to libstdc++
libs unless they use the same lock policy.
PR libstdc++/67843
* acinclude.m4 (GLIBCXX_ENABLE_LOCK_POLICY): Add new macro
that defines _GLIBCXX_HAVE_ATOMIC_LOCK_POLICY.
* config.h.in: Regenerate.
* configure: Regenerate.
* configure.ac: Use GLIBCXX_ENABLE_LOCK_POLICY.
* doc/xml/manual/configure.xml: Document new configure option.
* include/bits/fs_dir.h (directory_iterator): Use __shared_ptr
instead of shared_ptr.
(recursive_directory_iterator): Likewise.
(__shared_ptr<_Dir>): Add explicit instantiation declaration.
(__shared_ptr<recursive_directory_iterator::_Dir_stack>): Likewise.
* include/bits/shared_ptr_base.h (__allocate_shared, __make_shared):
Add default template argument for _Lock_policy template parameter.
* include/ext/concurrence.h (__default_lock_policy): Check macro
_GLIBCXX_HAVE_ATOMIC_LOCK_POLICY instead of checking if the current
target supports the builtins for compare-and-swap.
* src/filesystem/std-dir.cc (__shared_ptr<_Dir>): Add explicit
instantiation definition.
(__shared_ptr<recursive_directory_iterator::_Dir_stack>): Likewise.
(directory_iterator, recursive_directory_iterator): Use __make_shared
instead of make_shared.
From-SVN: r266533
An inlinable function body may need to refer to result parameters, so
each result parameter needs a name. We already give them all names in
start_function (via create_result_variables). Change the export data
so that for an inlinable function we use those names for the function
declaration's result parameters.
Reviewed-on: https://go-review.googlesource.com/c/150070
From-SVN: r266532
When we inline functions, we may parse types that we have not seen
before inlining. Inlining runs after the finalize_methods pass, so
those types will not be finalized, meaning that we don't have an
accurate list of which methods they support. Explicitly finalize them
when we parse them.
Reviewed-on: https://go-review.googlesource.com/c/150068
From-SVN: r266530
For inlined function bodies we're going to need to refer to variables,
so change the existing export data to add a '$' to names that look
like identifiers: true, false, nil, convert.
While we're here drop an unnecessary space character after operators.
Reviewed-on: https://go-review.googlesource.com/c/150067
From-SVN: r266529
Change expression importing to use a new abstract interface class
Import_expression, so that we can more easily import expressions from
inlinable function bodies. This is a refactoring with no affect on
compiler behavior.
Reviewed-on: https://go-review.googlesource.com/c/150065
From-SVN: r266526
Separate the Location that import_expression uses when creating a new
Expression from the Location used to report an error. This is a step
toward importing expressions for inlined functions. This is a pure
refactoring that does not affect compiler behavior.
Reviewed-on: https://go-review.googlesource.com/c/150064
From-SVN: r266525
In preparation for writing expressions to inline function bodies,
change the existing expression export code to use Export_function_body
rather than Export. Adjust existing expression exporters accordingly.
This is a refactoring that doesn't affect compiler output.
Reviewed-on: https://go-review.googlesource.com/c/150063
From-SVN: r266523
PR 87756 - missing unterminated argument warning using address of a constant character
PR 88211 - missing warning on printf %ls and unterminated wide member array
PR 88226 - missing warning on fprintf, fputs, and puts with an unterminated array
gcc/ChangeLog:
* gcc.dg/tree-ssa/builtin-fprintf-warn-1.c: Update/remove xfails.
* gcc.dg/tree-ssa/builtin-printf-warn-1.c: Same.
* gcc.dg/tree-ssa/user-printf-warn-1.c: Same.
From-SVN: r266522
gcc/ChangeLog:
2018-11-27 Mike Gulick <mgulick@mathworks.com>
PR preprocessor/83173
* input.c (dump_location_info): Dump reason and included_from
fields from line_map_ordinary struct. Fix indentation when
location > 5 digits.
* diagnostic-show-locus.c (num_digits, num_digits): Move to
diagnostic.c to allow it to be utilized by input.c.
* diagnostic.c (num_digits, selftest::test_num_digits): Moved
here.
(selftest::diagnostic_c_tests): Run selftest::test_num_digits.
* diagnostic.h (num_digits): Add extern definition.
libcpp/ChangeLog:
2018-11-27 Mike Gulick <mgulick@mathworks.com>
PR preprocessor/83173
* location-example.txt: Update example -fdump-internal-locations
output.
From-SVN: r266520
The short loop bug under certain conditions causes loops to
execute only once or twice, due to a hardware bug in the R5900 chip.
`-march=r5900' already enables the R5900 short loop workaround.
However, the R5900 ISA and most other MIPS ISAs are mutually
exclusive since R5900-specific instructions are generated as well.
The `-mfix-r5900' option can be used in combination with e.g.
`-mips2' or `-mips3' to generate generic MIPS binaries that also
work with the R5900 target. The workaround is implemented by GAS
rather than by GCC.
The following small `shortloop.c' file has been used as a test
with GCC 8.2.0:
void shortloop(void)
{
__asm__ __volatile__ (
" li $3, 300\n"
"loop:\n"
" addi $3, -1\n"
" addi $4, -1\n"
" bne $3, $0, loop\n"
" li $4, 3\n"
::);
}
The following six combinations have been tested:
% mipsr5900el-unknown-linux-gnu-gcc -O1 -c shortloop.c
% mipsr5900el-unknown-linux-gnu-gcc -O1 -c shortloop.c -mfix-r5900
% mipsr5900el-unknown-linux-gnu-gcc -O1 -c shortloop.c -mno-fix-r5900
% mipsr4000el-unknown-linux-gnu-gcc -O1 -c shortloop.c
% mipsr4000el-unknown-linux-gnu-gcc -O1 -c shortloop.c -mfix-r5900
% mipsr4000el-unknown-linux-gnu-gcc -O1 -c shortloop.c -mno-fix-r5900
The R5900 short loop erratum is corrected in exactly three cases:
1. for the target `mipsr5900el' by default;
2. for the target `mipsr5900el' with `-mfix-r5900';
3. for any other MIPS target (e.g. `mipsr4000el') with `-mfix-r5900'.
In all other cases the correction is not made.
2018-11-27 Fredrik Noring <noring@nocrew.org>
gcc/
* config/mips/mips.c (mips_reorg_process_insns)
(mips_option_override): Handle `-mfix-r5900'.
* config/mips/mips.h (ASM_SPEC): Add `mfix-r5900' and
`mno-fix-r5900'.
* config/mips/mips.opt (mfix-r5900): New option.
* doc/invoke.texi: Document the `r5900' processor name, and
`-mfix-r5900' and `-mno-fix-r5900' options.
From-SVN: r266519
2018-11-27 Mike Gulick <mgulick@mathworks.com>
PR preprocessor/83173
* gcc.dg/plugin/location-overflow-test-pr83173.c: New test.
* gcc.dg/plugin/location-overflow-test-pr83173.h: Header for
pr83173.c.
* gcc.dg/plugin/location-overflow-test-pr83173-1.h: Header for
pr83173.c.
* gcc.dg/plugin/location-overflow-test-pr83173-2.h: Header for
pr83173.c.
* gcc.dg/plugin/location_overflow_plugin.c: Use PLUGIN_PRAGMAS
instead of PLUGIN_START_UNIT.
* gcc.dg/plugin/plugin.exp: Enable new test.
From-SVN: r266518
Start reading the export data generated by the last change in this
series. At this point we will inline direct calls to empty functions
and methods defined in different packages.
Reviewed-on: https://go-review.googlesource.com/c/150062
From-SVN: r266517
2018-11-27 Mike Gulick <mgulick@mathworks.com>
PR preprocessor/83173
* files.c (_cpp_stack_include): Check if
line_table->highest_location is past current line before
decrementing.
From-SVN: r266516
* config/riscv/riscv (riscv_block_mvoe_straight): Use RETURN_BEGIN
in call to move_by_pieces.
* config/sh/sh-mem.c (expand_block_move): Use RETURN_BEGIN in call
to move_by_pieces.
From-SVN: r266514
* config/mips/mips.c (mips_block_move_straight): Use RETURN_BEGIN
in call to move_by_pieces.
2018-11-27 Tamar Christina <tamar.christina@arm.com>
From-SVN: r266512
* config/microblaze/microblaze.c (microblaze_block_move_straight): Use
RETURN_BEGIN in call to move_by_pieces.
(microblaze_expand_block_move): Likewise.
From-SVN: r266511
2018-11-27 Martin Liska <mliska@suse.cz>
* asan.c (asan_emit_stack_protection): Use new enum values
instead of int constants.
* builtins.c (expand_builtin_memory_copy_args): Replace int
type with memop_ret enum type.
(expand_builtin_mempcpy_args): Likewise.
(expand_builtin_memcpy): Use new enum values
instead of int constants. Likewise.
(expand_builtin_mempcpy): Likewise.
(expand_movstr): Likewise.
(expand_builtin_strcpy_args): Likewise.
(expand_builtin_stpcpy_1): Likewise.
(expand_builtin_strncpy): Likewise.
(expand_builtin_memset_args): Likewise.
* expr.c (move_by_pieces_d::finish_endp): Rename to ...
(move_by_pieces_d::finish_retmode): ... this.
(move_by_pieces): Change last argument type to memop_ret.
(store_by_pieces): Use new enum values
instead of int constants.
(emit_block_move_hints): Likewise.
(emit_push_insn): Likewise.
(store_expr): Likewise.
* expr.h (store_by_pieces): Change int to newly added enum
type.
* rtl.h (enum memop_ret): Define.
(move_by_pieces): Use the enum type.
From-SVN: r266508
* c-ada-spec.c: Include stringpool.h.
(has_static_fields): Return false for incomplete types.
(is_tagged_type): Likewise.
(has_nontrivial_methods): Likewise.
(dump_ada_node) <INTEGER_TYPE>: Deal specifically with __int128.
(struct overloaded_name_hash): New structure.
(struct overloaded_name_hasher): Likewise.
(overloaded_names): New global variable.
(init_overloaded_names): New static function.
(overloaded_name_p): New predicate.
(dump_ada_declaration) <TYPE_DECL>: Tidy up and set TREE_VISITED
on the TYPE_STUB_DECL of the original type of a typedef, if any.
<FUNCTION_DECL>: Bail out for an unsupported overloaded name.
Remove always-true condition and dump forward types.
(dump_ada_specs): Delete overloaded_names.
From-SVN: r266506
When backtrace_vector_release is called with vec.size == 0, it releases the
memory pointed at by vec.base.
Set vec.base set to NULL if vec.size == 0 to ensure we don't point to released
memory.
Bootstrapped and reg-tested on x86_64.
2018-11-27 Tom de Vries <tdevries@suse.de>
* mmap.c (backtrace_vector_release): Same.
* unittest.c (test1): Add check.
From-SVN: r266505
As of C17, realloc with size 0 is marked as an obsolescent feature.
Fix this in backtrace_vector_release by using free instead.
Bootstrapped and reg-tested on x86_64.
2018-11-27 Tom de Vries <tdevries@suse.de>
* alloc.c (backtrace_vector_release): Handle vec->size == 0 using free
instead of realloc.
* Makefile.am (check_PROGRAMS): Add unittest.
* Makefile.in: Regenerate.
* unittest.c: New file.
From-SVN: r266504
