Implement the proposed semantics from P1164R0, which reverts the changes
of LWG 2935. This means that failure to create a directory because a
non-directory already exists with that name will be reported as an
error.
While rewriting the function, also fix PR 87846, which is a result of
the C++17 changes to how a trailing slash on a path affects the last
component of a path.
PR libstdc++/86910
PR libstdc++/87846
* src/filesystem/ops.cc (experimental::create_directories): Report
an error when the path resolves to an existing non-directory (P1164).
* src/filesystem/std-ops.cc (create_directories): Likewise. Handle
empty filenames due to trailing slashes.
* testsuite/27_io/filesystem/operations/create_directories.cc: Test
when some component of the path exists and is not a directory. Test
trailing slashes.
* testsuite/experimental/filesystem/operations/create_directories.cc:
Likewise.
From-SVN: r266598
PR c/88065 - ICE in -Wsizeof-pointer-memaccess on an invalid strncpy
PR c/87297 - ICE on strncpy with an undeclared argument
gcc/c-family/ChangeLog:
PR c/88065
PR c/87297
* c-warn.c (sizeof_pointer_memaccess_warning): Bail if source
or destination is an error.
gcc/testsuite/ChangeLog:
PR c/88065
PR c/87297
* c-c++-common/Wsizeof-pointer-memaccess4.c: New test.
From-SVN: r266594
This sets a precedence in upstream for merging architecture agnostic
C bindings into one block, rather than separate duplicated blocks.
A nice side-effect is it almost completes the C bindings for
s390-linux-gnu and sparc-linux-gnu, and fixes a bug on MIPS32 where
O_SYNC had the wrong value.
Backported from upstream druntime master.
Reviewed-on: https://github.com/dlang/druntime/pull/2357
From-SVN: r266593
* predict.c (determine_unlikely_bbs): Forward declare; also determine
edges that are always known to be taken because it is only likely
edge out of given BB.
(tree_estimate_probability): Call before profile guessing to get bit
of extra precision.
* gcc.dg/predict-13.c: Update template.
* gcc.dg/predict-13b.c: New testcase.
* gcc.dg/predict-22.c: New testcase.
* gcc.dg/tree-ssa/ipa-split-4.c: Change abort to other function to
get sane profile.
From-SVN: r266587
2018-11-28 Vladimir Makarov <vmakarov@redhat.com>
PR target/88207
* ira-costs.c (scan_one_insn): Process subregs when updating costs
for pseudos and allocnos from insn.
From-SVN: r266582
Support inlining functions that contain only assignments and return
statements, with expressions of either constants or parameters.
Functions that contain other kinds of statements or expressions are
not yet inlined. With this change, about 100 functions in the
standard library are inlinable.
Reviewed-on: https://go-review.googlesource.com/c/150073
From-SVN: r266573
* config/h8300/constraints.md: Add "C" constraint for call insns.
* config/h8300/h8300.md (call, call_value): Turn into a define_expand
and define_insn pair. Move invalid call targets into a register in
the expander and fix constraints in the matching pattern.
* config/h8300/predicates.md (call_expander_operand): Renamed from
call_insn_operand. Reject things we shouldn't be trying to handle.
(call_insn_operand): New predicate for use by the call/call_value
insns.
(small_call_insn_operand): Update appropriately.
From-SVN: r266571
2018-11-28 Sam Tebbs <sam.tebbs@arm.com>
* config/aarch64/aarch64.c (aarch64_process_target_attr): Replace
calls to strtok with strtok_r.
From-SVN: r266570
The recent patch for PR 83306 removed the fs_err_concat functions that
were used by the experimental::filesystem::filesystem_error class as
well. This fixes it by doing the string generation directly in
filesystem_error::_M_gen_what() instead of using the removed function.
PR libstdc++/83306
* src/filesystem/path.cc (filesystem_error::_M_gen_what()): Create
string directly, instead of calling fs_err_concat.
From-SVN: r266569
Add fix for "path::lexically_relative is confused by trailing slashes".
* doc/xml/manual/intro.xml: Document LWG 3096 change.
* src/filesystem/std-path.cc (path::lexically_relative(const path&)):
Treat a final empty element equivalently to a final dot element.
* testsuite/27_io/filesystem/path/generation/relative.cc: Add checks
for the examples in the DR.
From-SVN: r266566
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
Jonathan Wakely