Harald Anlauf [Sun, 24 May 2020 19:35:04 +0000 (21:35 +0200)]
PR fortran/95106 - truncation of long symbol names with EQUIVALENCE
For long module names, the generated name-mangled symbol was
truncated, leading to bogus warnings about COMMON block
mismatches. Provide sufficiently large temporaries.
gcc/fortran/
2020-05-24 Harald Anlauf <anlauf@gmx.de>
PR fortran/95106
* trans-common.c (gfc_sym_mangled_common_id): Enlarge temporaries
for name-mangling.
gcc/testsuite/
2020-05-24 Harald Anlauf <anlauf@gmx.de>
PR fortran/95106
* gfortran.dg/equiv_11.f90: New test.
David Edelsohn [Sat, 23 May 2020 21:41:45 +0000 (21:41 +0000)]
libcpp, libdecnumber: configure and substitute AR
AIX supports "FAT" libraries containing 32 bit and 64 bit objects
(similar to Darwin), but commands for manipulating libraries do not
default to accept both 32 bit and 64 bit object files. While updating
the AIX configuration to support building and running GCC as a 64 bit
application, I have encountered some build libraries that hard code
AR=ar instead of testing the environment.
This patch adds AR_CHECK_TOOL(AR, ar) to configure.ac for the two
libraries and updates Makefile.in to accept the substitution.
Patrick Palka [Sat, 23 May 2020 19:25:40 +0000 (15:25 -0400)]
libstdc++: Compile PR93978 testcase with -Wall
Now that the frontend issue PR c++/94038 is thoroughly fixed, the
testcase for PR93978 no longer fails to compile with -O -Wall, so add
-Wall to the testcase's compile flags to help ensure we don't regress
here.
Patrick Palka [Sat, 23 May 2020 18:39:28 +0000 (14:39 -0400)]
c++: Avoid concept evaluation when uid-sensitive [PR94038]
Concept evaluation may entail DECL_UID generation and/or template
instantiation, so in general we can't perform it during uid-sensitive
constexpr evaluation.
gcc/cp/ChangeLog:
PR c++/94038
* constexpr.c (cxx_eval_constant_expression)
<case TEMPLATE_ID_EXPR>: Don't evaluate the concept when
constexpr evaluation is uid-sensitive.
Jonathan Wakely [Sat, 23 May 2020 17:27:35 +0000 (18:27 +0100)]
libstdc++: Fix function that can't be constexpr in C++11 (PR 95289)
The body of this function isn't just a return statement, so it can't be
constexpr until C++14.
PR libstdc++/95289
* include/debug/helper_functions.h (__get_distance): Only declare
as a constexpr function for C++14 and up.
* testsuite/25_algorithms/copy/debug/95289.cc: New test.
PR libfortran/95191
* io/async.c (async_wait_id): Generate error if ID is higher
than the highest current ID.
* runtime/error.c (translate_error): Handle LIBERROR_BAD_WAIT_ID.
libgomp/ChangeLog:
2020-05-23 Thomas Koenig <tkoenig@gcc.gnu.org>
PR libfortran/95191
* testsuite/libgomp.fortran/async_io_9.f90: New test.
This simplifies the logic of converting Source arguments and pairs of
InputIterator arguments into the native string format. For any input
that is a contiguous range of path::value_type (or char8_t for POSIX)
a string view can be created and the conversion can be done directly,
with no intermediate allocation. Previously some cases created a
basic_string unnecessarily, for example construction from a pair of
path::string_type::iterators, or a pair of non-const value_type*
pointers.
* include/bits/fs_path.h (__detail::_S_range_begin)
(__detail::_S_range_end, path::_S_string_from_iter): Replace with
overloaded function template __detail::__effective_range.
(__detail::__effective_range): New overloaded function template to
create a basic_string or basic_string_view for an effective range.
(__detail::__value_type_is_char): Use __detail::__effective_range.
Do not use remove_const on value type.
(__detail::__value_type_is_char_or_char8_t): Likewise.
(path::path(const Source&, format))
(path::path(const Source&, const locale&))
(path::operator/=(const Source&), path::append(const Source&))
(path::concat(const Source&)): Use __detail::__effective_range.
(path::_S_to_string(InputIterator, InputIterator)): New function
template to create a string view if possible, or string otherwise.
(path::_S_convert): Add overloads that convert a string returned
by __detail::__effective_range. Use if-constexpr to inline conversion
logic from all overloads of _Cvt::_S_convert.
(path::_S_convert_loc): Add overload that converts a string. Use
_S_to_string to avoid allocation when possible.
(path::_Cvt): Remove.
(path::operator+=(CharT)): Remove indirection through path::concat.
* include/experimental/bits/fs_path.h (path::_S_convert_loc): Add
overload for non-const pointers, to avoid constructing a std::string.
* src/c++17/fs_path.cc (path::_S_convert_loc): Replace conditional
compilation with call to _S_convert.
Jonathan Wakely [Sat, 23 May 2020 08:00:16 +0000 (09:00 +0100)]
libstdc++: Remove incorrect static specifiers
These functions were originally static members of the path class, but
the 'static' specifiers were not removed when they were moved to
namespace scope. This causes ODR violations when the functions are
called from functions defined in the header, which is incompatible with
Nathan's modules branch. Change them to 'inline' instead.
This replaces the filesystem::__detail::_Path SFINAE helper with two
separate helpers, _Path and _Path2. This avoids having one helper which
tries to check two different sets of requirements.
The _Path helper now uses variable templates instead of a set of
overloaded functions to detect specializations of basic_string or
basic_string_view.
The __not_<is_void<remove_pointer_t<_Tp1>> check is not necessary in
C++20 because iterator_traits<void*> is now empty. For C++17 replace
that check with a __safe_iterator_traits helper with partial
specializations for void pointers.
Finally, the __is_encoded_char check no longer uses remove_const_t,
which means that iterators with a const value_type will no longer be
accepted as arguments for path creation. Such iterators resulted in
undefined behaviour anyway, so it's still conforming to reject them in
the constraint checks.
* include/bits/fs_path.h (filesystem::__detail::__is_encoded_char):
Replace alias template with variable template. Don't remove const.
(filesystem::__detail::__is_path_src): Replace overloaded function
template with variable template and specializations.
(filesystem::__detail::__is_path_iter_src): Replace alias template
with class template.
(filesystem::__detail::_Path): Use __is_path_src. Remove support for
iterator pairs.
(filesystem::__detail::_Path2): New alias template for checking
InputIterator requirements.
(filesystem::__detail::__constructible_from): Remove.
(filesystem::path): Replace _Path<Iter, Iter> with _Path2<Iter>.
* testsuite/27_io/filesystem/path/construct/80762.cc: Check with two
constructor arguments of void and void* types.
Iain Sandoe [Sat, 23 May 2020 07:25:10 +0000 (08:25 +0100)]
Darwin: Make sanitizer local vars linker-visible.
Another case where we need a linker-visible symbols in order to
preserve the ld64 atom model. If these symbols are emitted as
'local' the linker cannot see that they are separate from any
global weak entry that precedes them. This will cause the linker
to complain that there is (apparently) direct access to such a
weak global, preventing it from being replaced.
This is a short-term fix for the problem - we need generic
handling for relevant cases (that also does not pessimise objects
by emitting unnecessary symbols and relocations).
gcc/ChangeLog:
2020-05-23 Iain Sandoe <iain@sandoe.co.uk>
* config/darwin.h (ASM_GENERATE_INTERNAL_LABEL):
Make ubsan_{data,type},ASAN symbols linker-visible.
Jason Merrill [Fri, 22 May 2020 21:06:57 +0000 (17:06 -0400)]
c++: Fix C++17 eval order for virtual op=.
In a function call expression in C++17 evaluation of the function pointer is
sequenced before evaluation of the function arguments, but that doesn't
apply to function calls that were written using operator syntax. In
particular, for operators with right-to-left ordering like assignment, we
must not evaluate the LHS to find a virtual function before we evaluate the
RHS.
gcc/cp/ChangeLog:
* cp-gimplify.c (cp_gimplify_expr) [CALL_EXPR]: Don't preevaluate
the function address if the call used operator syntax.
Mark Wielaard [Tue, 19 May 2020 21:18:09 +0000 (23:18 +0200)]
Suggest including <stdbool.h> for bool, true and false
Currently gcc suggests to use _Bool instead of bool and doesn't give
any suggestions when true or false are used, but undefined. This patch
makes it so that (for C99 or higher) a fixit hint is emitted to include
<stdbool.h>.
gcc/c-family/ChangeLog:
* known-headers.cc (get_stdlib_header_for_name): Return
"<stdbool.h>" for "bool", "true" or "false" when STDLIB_C and
flag_isoc99.
Jason Merrill [Thu, 21 May 2020 04:22:10 +0000 (00:22 -0400)]
c++: -fsanitize=vptr and -fstrong-eval-order. [PR95221]
With -fstrong-eval-order=all we evaluate the function address before the
arguments. But this caused trouble with virtual functions and
-fsanitize=vptr; we would do vptr sanitization as part of calculating the
'this' argument, and separately look at the vptr in order to find the
function address. Without -fstrong-eval-order=all 'this' is evaluated
first, but with that flag the function address is evaluated first, so we
would access the null vptr before sanitizing it.
Fixed by instrumenting the OBJ_TYPE_REF of a virtual function call instead
of the 'this' argument.
This issue suggests that we should be running the ubsan tests in multiple
standard modes like the rest of the G++ testsuite, so I've made that change
as well.
gcc/cp/ChangeLog:
* cp-ubsan.c (cp_ubsan_maybe_instrument_member_call): For a virtual
call, instrument the OBJ_TYPE_REF.
gcc/ChangeLog:
PR target/95255
* config/i386/i386.md (<rounding_insn><mode>2): Do not try to
expand non-sse4 ROUND_ROUNDEVEN rounding via SSE support routines.
gcc/testsuite/ChangeLog:
PR target/95255
* gcc.target/i386/pr95255.c: New test.
Jan Hubicka [Fri, 22 May 2020 14:37:06 +0000 (16:37 +0200)]
Avoid streaming stray references.
this patch avoids stremaing completely useless stray references to gobal decl
stream. I am re-testing the patch (rebased to current tree) on x86_64-linux
and intend to commit once testing finishes.
gcc/ChangeLog:
2020-05-22 Jan Hubicka <hubicka@ucw.cz>
* lto-streamer-out.c (lto_output_tree): Do not stream final ref if
it is not needed.
gcc/lto/ChangeLog:
2020-05-22 Jan Hubicka <hubicka@ucw.cz>
* lto-common.c (lto_read_decls): Do not skip stray refs.
Jan Hubicka [Fri, 22 May 2020 13:44:10 +0000 (15:44 +0200)]
Improve LTO streaming dumps
this patch cleans up dumping of streaming so it is clear how dump is organized
and how much space individual components needs.
Compiling:
int a=1;
main()
{
return a;
}
The output is now:
Creating output block for function_body
Streaming tree <result_decl 0x7ffff7457a50 D.1931>
Start of LTO_trees of size 1
Encoding indexable <integer_type 0x7ffff7463000 sizetype> as 0
10 bytes
^^^ I do not think we should need 10 bytes to stream single indexable reference
to 0 :)
Start of LTO_trees of size 1
Encoding indexable <integer_type 0x7ffff74630a8 bitsizetype> as 1
10 bytes
Streaming header of <result_decl 0x7ffff7457a50 D.1931> to function_body
Streaming body of <result_decl 0x7ffff7457a50 D.1931> to function_body
Encoding indexable <integer_type 0x7ffff74635e8 int> as 2
Encoding indexable <function_decl 0x7ffff757b500 main> as 0
Streaming ref to <integer_cst 0x7ffff744af18 32>
Streaming ref to <integer_cst 0x7ffff744af30 4>
52 bytes
^^^ Instead of having multiple LTO_trees sections followed by the final tree
it would make a lot of sense to have only one LTO_trees where the first tree
is one lto_input_tree should return. This is easy to arrange in DFS walk -
one does not need to pop after every SCC component but pop once at the end of
walk. However this breaks handling of integer_csts because they may now
become of LTO_trees block and streamed as header + body.
This bypasses the separate code for shared integer_cst streaming. I think
I want to stream everything into header and materialize the tree since it is not
part of SCC anyway.
Streaming tree <block 0x7ffff757e420>
Streaming header of <block 0x7ffff757e420> to function_body
Streaming body of <block 0x7ffff757e420> to function_body
8 bytes
Streaming gimple stmt _2 = a;
Streaming ref to <block 0x7ffff757e420>
4 bytes
Streaming tree <mem_ref 0x7ffff7576f78>
Start of LTO_trees of size 1
Encoding indexable <pointer_type 0x7ffff746b9d8> as 3
10 bytes
Start of LTO_trees of size 1
Streaming header of <addr_expr 0x7ffff75893c0> to function_body
Streaming body of <addr_expr 0x7ffff75893c0> to function_body
Encoding indexable <var_decl 0x7ffff7fcfb40 a> as 0
15 bytes
Streaming header of <mem_ref 0x7ffff7576f78> to function_body
Streaming body of <mem_ref 0x7ffff7576f78> to function_body
Streaming ref to <addr_expr 0x7ffff75893c0>
Streaming ref to <integer_cst 0x7ffff75a3240 0>
42 bytes
Streaming gimple stmt return _2;
Outputting global stream
0: <function_decl 0x7ffff757b500 main>
Streaming tree <function_decl 0x7ffff757b500 main>
Start of LTO_tree_scc of size 1
Streaming header of <optimization_node 0x7ffff744b000> to decls
Streaming body of <optimization_node 0x7ffff744b000> to decls
576 bytes
Start of LTO_tree_scc of size 1
Streaming header of <target_option_node 0x7ffff744a018> to decls
Streaming body of <target_option_node 0x7ffff744a018> to decls
68 bytes
Streaming single tree
Streaming header of <identifier_node 0x7ffff7577aa0 main> to decls
Streaming body of <identifier_node 0x7ffff7577aa0 main> to decls
3 bytes
Streaming single tree
Streaming header of <identifier_node 0x7ffff758a8c0 t.c> to decls
Streaming body of <identifier_node 0x7ffff758a8c0 t.c> to decls
3 bytes
Streaming single tree
Streaming header of <translation_unit_decl 0x7ffff7457ac8 t.c> to decls
Streaming body of <translation_unit_decl 0x7ffff7457ac8 t.c> to decls
Streaming ref to <identifier_node 0x7ffff758a8c0 t.c>
22 bytes
Start of LTO_tree_scc of size 1
Streaming header of <function_type 0x7ffff74717e0> to decls
Streaming body of <function_type 0x7ffff74717e0> to decls
Streaming ref to <integer_type 0x7ffff74635e8 int>
Streaming ref to <integer_cst 0x7ffff744adc8 8>
Streaming ref to <integer_cst 0x7ffff744ade0 1>
Streaming ref to <function_type 0x7ffff74717e0>
38 bytes
Start of LTO_tree_scc of size 1
Streaming header of <function_type 0x7ffff75832a0> to decls
Streaming body of <function_type 0x7ffff75832a0> to decls
Streaming ref to <integer_type 0x7ffff74635e8 int>
Streaming ref to <integer_cst 0x7ffff744adc8 8>
Streaming ref to <integer_cst 0x7ffff744ade0 1>
Streaming ref to <function_type 0x7ffff74717e0>
38 bytes
Start of LTO_tree_scc of size 1
Streaming header of <function_decl 0x7ffff757b500 main> to decls
Streaming body of <function_decl 0x7ffff757b500 main> to decls
Streaming ref to <function_type 0x7ffff75832a0>
Streaming ref to <identifier_node 0x7ffff7577aa0 main>
Streaming ref to <translation_unit_decl 0x7ffff7457ac8 t.c>
Streaming ref to <identifier_node 0x7ffff7577aa0 main>
Streaming ref to <target_option_node 0x7ffff744a018>
Streaming ref to <optimization_node 0x7ffff744b000>
58 bytes
806 bytes
0: <var_decl 0x7ffff7fcfb40 a>
Streaming tree <var_decl 0x7ffff7fcfb40 a>
Streaming single tree
Streaming header of <identifier_node 0x7ffff758a870 a> to decls
Streaming body of <identifier_node 0x7ffff758a870 a> to decls
3 bytes
Streaming single tree
Streaming ref to <integer_type 0x7ffff7463000 sizetype>
7 bytes
Streaming single tree
Streaming ref to <integer_type 0x7ffff74630a8 bitsizetype>
7 bytes
Start of LTO_tree_scc of size 1
Streaming header of <var_decl 0x7ffff7fcfb40 a> to decls
Streaming body of <var_decl 0x7ffff7fcfb40 a> to decls
Streaming ref to <integer_type 0x7ffff74635e8 int>
Streaming ref to <identifier_node 0x7ffff758a870 a>
Streaming ref to <translation_unit_decl 0x7ffff7457ac8 t.c>
Streaming ref to <integer_cst 0x7ffff744af18 32>
Streaming ref to <integer_cst 0x7ffff744af30 4>
Streaming ref to <identifier_node 0x7ffff758a870 a>
Streaming ref to <integer_cst 0x7ffff7468090 1>
49 bytes
66 bytes
gcc/ChangeLog:
2020-05-22 Jan Hubicka <hubicka@ucw.cz>
* lto-section-out.c (lto_output_decl_index): Adjust dump indentation.
* lto-streamer-out.c (create_output_block): Fix whitespace
(lto_write_tree_1): Add (debug) dump.
(DFS::DFS): Add dump.
(DFS::DFS_write_tree_body): Do not dump here.
(lto_output_tree): Improve dumping; do not stream ref when not needed.
(produce_asm_for_decls): Fix whitespace.
* tree-streamer-out.c (streamer_write_tree_header): Add dump.
Jan Hubicka [Fri, 22 May 2020 10:29:19 +0000 (12:29 +0200)]
Simplify streaming of SCC components
this patch saves few bytes from SCC streaming. First we stream end markers
that are fully ignored at stream in.
Second I missed streaming of emtry_len in the previous change so it is
pointlessly streamed for LTO_trees. Moreover entry_len is almost always 1
(always during gcc bootstrap) and thus it makes sense to avoid stremaing it
in majority of cases.
gcc/ChangeLog:
2020-05-21 Jan Hubicka <hubicka@ucw.cz>
* lto-streamer-in.c (lto_read_tree): Do not stream end markers.
(lto_input_scc): Optimize streaming of entry lengths.
* lto-streamer-out.c (lto_write_tree): Do not stream end markers
(DFS::DFS): Optimize stremaing of entry lengths
Richard Biener [Mon, 18 May 2020 14:05:56 +0000 (16:05 +0200)]
enfoce SLP_TREE_VECTYPE for invariants
This tries to enforce a set SLP_TREE_VECTYPE in vect_get_constant_vectors
and provides some infrastructure for setting it in the vectorizable_*
functions, amending those.
2020-05-22 Richard Biener <rguenther@suse.de>
* tree-vectorizer.h (vect_is_simple_use): New overload.
(vect_maybe_update_slp_op_vectype): New.
* tree-vect-stmts.c (vect_is_simple_use): New overload
accessing operands of SLP vs. non-SLP operation transparently.
(vect_maybe_update_slp_op_vectype): New function updating
the possibly shared SLP operands vector type.
(vectorizable_operation): Be a bit more SLP vs non-SLP agnostic
using the new vect_is_simple_use overload; update SLP invariant
operand nodes vector type.
(vectorizable_comparison): Likewise.
(vectorizable_call): Likewise.
(vectorizable_conversion): Likewise.
(vectorizable_shift): Likewise.
(vectorizable_store): Likewise.
(vectorizable_condition): Likewise.
(vectorizable_assignment): Likewise.
* tree-vect-loop.c (vectorizable_reduction): Likewise.
* tree-vect-slp.c (vect_get_constant_vectors): Enforce
present SLP_TREE_VECTYPE and check it matches previous
behavior.
Richard Biener [Wed, 20 May 2020 13:14:47 +0000 (15:14 +0200)]
add ctor/dtor to slp_tree
This adds constructor and destructor to slp_tree factoring common
code. I've not changed the wrappers to overloaded CTORs since
I hope to use object_allocator<> and am not sure whether that can
be done in any fancy way yet.
Jason Merrill [Thu, 21 May 2020 14:27:11 +0000 (10:27 -0400)]
c++: Check constant array bounds later.
We give a better diagnostic for non-constant array bounds in
compute_array_index_type_loc, we don't need to diagnose it in the parser.
But to avoid a regression on parse/varmod1.C we need to actually check
non-dependent expressions in a template.
gcc/cp/ChangeLog:
* decl.c (compute_array_index_type_loc): Diagnose expressions
in a template that can't be constant.
* parser.c (cp_parser_direct_declarator): Don't check
non-constant array bounds here.
Jason Merrill [Thu, 21 May 2020 14:27:11 +0000 (10:27 -0400)]
c++: Constant expression parsing and parameters.
The difference between a "potential" constant-expression and a regular
constant-expression is the treatment of parameters; in a constexpr function,
a parameter is potentially constant when evaluating a call to that function,
but it is not constant during parsing of the function.
cp_parser_constant_expression should check the latter rather than the
former.
gcc/cp/ChangeLog:
* cp-tree.h (is_rvalue_constant_expression): Declare.
* constexpr.c (is_rvalue_constant_expression): New.
* parser.c (cp_parser_constant_expression): Use it.
* decl.c (cp_finish_decl): Try to treat a constexpr initializer in a
template as constant.
In file included from ./tm_p.h:4,
from /vol/gcc/src/hg/master/local/gcc/adjust-alignment.c:28:
/vol/gcc/src/hg/master/local/gcc/config/sparc/sparc-protos.h:45:47: error: use of enum 'memmodel' without previous declaration
extern void sparc_emit_membar_for_model (enum memmodel, int, int);
^~~~~~~~
Fixed by including memmodel.h. Bootstrapped on sparc-sun-solaris2.11
and i386-pc-solaris2.11.
Patrick Palka [Thu, 21 May 2020 13:03:43 +0000 (09:03 -0400)]
c++: template instantiation during fold_for_warn [PR94038]
Unfortunately, the previous fix to PR94038 is fragile. When the
argument to fold_for_warn is a bare CALL_EXPR, then all is well: the
result of maybe_constant_value from fold_for_warn (with
uid_sensitive=true) is reused via the cv_cache in the subsequent call to
maybe_constant_value from cp_fold (with uid_sensitive=false), so we
avoid instantiating bar<int>.
But when the argument to fold_for_warn is more complex, e.g. an
INDIRECT_REF of a CALL_EXPR, as in the testcase below (due to bar<int>()
returning const int& which we need to decay to int) then from
fold_for_warn we call maybe_constant_value on the INDIRECT_REF, and from
cp_fold we call it on the CALL_EXPR, so there is no reuse via the
cv_cache and we therefore end up instantiating bar<int>.
So for a more robust solution to this general issue of warning flags
affecting code generation, it seems that we need a way to globally avoid
template instantiation during constexpr evaluation whenever we're
performing warning-dependent folding.
To that end, this patch replaces the flag constexpr_ctx::uid_sensitive
with a global flag uid_sensitive_constexpr_evaluation_p, and enables it
during fold_for_warn using an RAII helper.
The patch also adds a counter that keeps track of the number of times
uid_sensitive_constexpr_evaluation_p is called and returned true, and we
use this to determine whether the result of constexpr evaluation
was restricted by the flag. This lets us safely update the cv_cache and
fold_cache from fold_for_warn in the most common case where the flag
did not restrict constexpr evaluation.
gcc/cp/ChangeLog:
PR c++/94038
* constexpr.c (constexpr_ctx::uid_sensitive): Remove field.
(uid_sensitive_constexpr_evaluation_value): Define.
(uid_sensitive_constexpr_evaluation_true_counter): Define.
(uid_sensitive_constexpr_evaluation_p): Define.
(uid_sensitive_constexpr_evaluation_sentinel): Define its
constructor.
(uid_sensitive_constexpr_evaluation_checker): Define its
constructor and its evaluation_restricted_p method.
(get_fundef_copy): Remove 'ctx' parameter. Use u_s_c_e_p
instead of constexpr_ctx::uid_sensitive.
(cxx_eval_call_expression): Use u_s_c_e_p instead, and test it
last. Adjust call to get_fundef_copy.
(instantiate_cx_fn_r): Test u_s_c_e_p so that we increment the
counter if necessary.
(cxx_eval_outermost_constant_expr): Remove 'uid_sensitive'
parameter. Adjust function body accordingly.
(maybe_constant_value): Remove 'uid_sensitive' parameter and
adjust function body accordingly. Set up a
uid_sensitive_constexpr_evaluation_checker, and use it to
conditionally update the cv_cache.
* cp-gimplify.c (cp_fold): Set up a
uid_sensitive_constexpr_evaluation_checker, and use it to
conditionally update the fold_cache.
* cp-tree.h (maybe_constant_value): Update declaration.
(struct uid_sensitive_constexpr_evaluation_sentinel): Define.
(struct sensitive_constexpr_evaluation_checker): Define.
* expr.c (fold_for_warn): Set up a
uid_sensitive_constexpr_evaluation_sentinel before calling
the folding subroutines. Drop all but the first argument to
maybe_constant_value.
Martin Liska [Thu, 21 May 2020 12:21:31 +0000 (14:21 +0200)]
Fix a test-case warning.
PR target/95229
* g++.target/i386/pr95229.C: Fix
error: unnamed type with no linkage used
to declare variable ‘<unnamed class> e’ with linkage
with -std=gnu++98.
Jonathan Wakely [Thu, 21 May 2020 06:32:15 +0000 (07:32 +0100)]
libstdc++: Avoid constraint recursion with iterator_traits (PR 93983)
Checking whether a filesystem::path constructor argument is an iterator
requires instantiating std::iterator_traits. In C++20 that checks for
satisfaction of std::iterator_traits constraints, which checks if the
type is copyable, which can end up recursing back to the path
constructor. The fix in LWG 3420 is to reorder the cpp17-iterator
concept's constraints to check if the type looks vaguely like an
iterator before checking copyable. That avoids the recursion for types
which definitely aren't iterators, but isn't foolproof.
PR libstdc++/93983
* include/bits/iterator_concepts.h (__detail::__cpp17_iterator):
Reorder constraints to avoid recursion when constructors use
iterator_traits (LWG 3420).
* testsuite/24_iterators/customization_points/lwg3420.cc: New test.
Uros Bizjak [Wed, 20 May 2020 23:53:09 +0000 (01:53 +0200)]
i386: Do not use commutative operands with (use) RTX [PR95238]
2020-05-21 Uroš Bizjak <ubizjak@gmail.com>
gcc/ChangeLog:
PR target/95218
* config/i386/mmx.md (*mmx_<code>v2sf): Do not mark
operands 1 and 2 commutative. Manually swap operands.
(*mmx_nabsv2sf2): Ditto.
Partially revert:
* config/i386/i386.md (*<code>tf2_1):
Mark operands 1 and 2 commutative.
(*nabstf2_1): Ditto.
* config/i386/sse.md (*<code><mode>2): Mark operands 1 and 2
commutative. Do not swap operands.
(*nabs<mode>2): Ditto.
Fix premature omission of ChangeLog entry in ChangeLog file..
* g++.dg/warn/Wconversion-null-2.C: Add explicit declarations for l()
and g() with int, long, long long and __int20 arguments.
* g++.dg/warn/Wconversion-null.C: Likewise.
TESTSUITE: Fix Wconversion-null*.C tests for aarch64 -mabi=ilp32
This fixes regressions for aarch64 with -mabi=ilp32 of the
Wconversion-null*.C tests, introduced by 92ea8e1bccc.
The "g (int)" declaration is required for that target where
sizeof(int) == sizeof(long) == sizeof(void *).
To handle the msp430/-mlarge case, an explicit declaration of
"g (__int20)" is required.
gcc/testsuite/ChangeLog:
* g++.dg/warn/Wconversion-null-2.C: Add explicit declarations for l()
and g() with int, long, long long and __int20 arguments.
* g++.dg/warn/Wconversion-null.C: Likewise.
Marek Polacek [Sat, 4 Apr 2020 22:09:53 +0000 (18:09 -0400)]
c++: C++20 DR 2237, disallow simple-template-id in cdtor.
This patch implements DR 2237 which says that a simple-template-id is
no longer valid as the declarator-id of a constructor or destructor;
see [diff.cpp17.class]#2. It is not explicitly stated but out-of-line
destructors with a simple-template-id are also meant to be ill-formed
now. (Out-of-line constructors like that are invalid since DR1435 I
think.) This change only applies to C++20; it is not a DR against C++17.
I'm not crazy about the diagnostic in constructors but ISTM that
cp_parser_constructor_declarator_p shouldn't print errors.
DR 2237
* parser.c (cp_parser_unqualified_id): Reject simple-template-id as
the declarator-id of a destructor.
(cp_parser_constructor_declarator_p): Reject simple-template-id as
the declarator-id of a constructor.
* g++.dg/DRs/dr2237.C: New test.
* g++.dg/parse/constructor2.C: Add dg-error for C++20.
* g++.dg/parse/dtor12.C: Likewise.
* g++.dg/parse/dtor4.C: Likewise.
* g++.dg/template/dtor4.C: Adjust dg-error.
* g++.dg/template/error34.C: Likewise.
* g++.old-deja/g++.other/inline15.C: Only run for C++17 and lesses.
* g++.old-deja/g++.pt/ctor2.C: Add dg-error for C++20.
Nathan Sidwell [Wed, 20 May 2020 20:43:11 +0000 (13:43 -0700)]
preprocessor: Revert premature change
This part of the cleanup patch turns out to require more pieces to
function correctly. I must have got confused over which tree I was
testing. The very first map has a different pointer to the file name,
so doesn't match with a pointer compare. We were relying on that.
Marek Polacek [Wed, 20 May 2020 03:53:28 +0000 (23:53 -0400)]
c++: Implement DR 2289, Uniqueness of structured binding names [PR94553]
DR 2289 clarified that since structured bindings have no C compatibility
implications, they should be unique in their declarative region, see
[basic.scope.declarative]/4.2.
The duplicate_decls hunk is the gist of the patch, but that alone would
not be enough to detect the 'A' case: cp_parser_decomposition_declaration
uses
to create the 'A' VAR_DECL but in this start_decl's grokdeclarator we
don't do fit_decomposition_lang_decl because the declarator kind is not
cdk_decomp, so then when start_decl calls maybe_push_decl, the decl 'A'
isn't DECL_DECOMPOSITION_P and we don't detect this case. So I needed a
way to signal to start_decl that it should fit_decomposition_lang_decl.
In this patch, I'm adding SD_DECOMPOSITION flag to say that the variable
is initialized and it should also be marked as DECL_DECOMPOSITION_P.
DR 2289
PR c++/94553
* cp-tree.h (SD_DECOMPOSITION): New flag.
* decl.c (duplicate_decls): Make sure a structured binding is unique
in its declarative region.
(start_decl): If INITIALIZED is SD_DECOMPOSITION, call
fit_decomposition_lang_decl.
(grokdeclarator): Compare INITIALIZED directly to SD_* flags.
* parser.c (cp_parser_decomposition_declaration): Pass SD_DECOMPOSITION
to start_decl.
Martin Liska [Wed, 20 May 2020 14:10:02 +0000 (16:10 +0200)]
git_email.py: fix duplicate author_lines.
* gcc-changelog/git_commit.py: Add author_tuple
only if not present in author_lines.
* gcc-changelog/test_email.py: New test.
* gcc-changelog/test_patches.txt: Add new patch.
Jan Hubicka [Wed, 20 May 2020 13:58:22 +0000 (15:58 +0200)]
Avoid SCC hashing on unmergeable trees
This is new incarantion of patch to identify unmergeable tree at streaming out
time rather than streaming in and to avoid pickling them to sccs with with hash
codes.
Building cc1 plus this patch reduces:
[WPA] read 4452927 SCCs of average size 1.986030
[WPA] 8843646 tree bodies read in total
[WPA] tree SCC table: size 524287, 205158 elements, collision ratio: 0.505204
[WPA] tree SCC max chain length 43 (size 1)
[WPA] Compared 947551 SCCs, 780270 collisions (0.823460)
[WPA] Merged 944038 SCCs
[WPA] Merged 5253521 tree bodies
[WPA] Merged 590027 types
...
[WPA] Size of mmap'd section decls: 99229066 bytes
[WPA] Size of mmap'd section function_body: 18398837 bytes
[WPA] Size of mmap'd section refs: 733678 bytes
[WPA] Size of mmap'd section jmpfuncs: 2965981 bytes
[WPA] Size of mmap'd section pureconst: 170248 bytes
[WPA] Size of mmap'd section profile: 17985 bytes
[WPA] Size of mmap'd section symbol_nodes: 3392736 bytes
[WPA] Size of mmap'd section inline: 2693920 bytes
[WPA] Size of mmap'd section icf: 435557 bytes
[WPA] Size of mmap'd section offload_table: 0 bytes
[WPA] Size of mmap'd section lto: 4320 bytes
[WPA] Size of mmap'd section ipa_sra: 651660 bytes
... to ...
[WPA] read 3312246 unshared trees
[WPA] read 1144381 mergeable SCCs of average size 4.833785
[WPA] 8843938 tree bodies read in total
[WPA] tree SCC table: size 524287, 197767 elements, collision ratio: 0.506446
[WPA] tree SCC max chain length 43 (size 1)
[WPA] Compared 946614 SCCs, 775077 collisions (0.818789)
[WPA] Merged 943798 SCCs
[WPA] Merged 5253336 tree bodies
[WPA] Merged 590105 types
....
[WPA] Size of mmap'd section decls: 81262144 bytes
[WPA] Size of mmap'd section function_body: 14702611 bytes
[WPA] Size of mmap'd section ext_symtab: 0 bytes
[WPA] Size of mmap'd section refs: 733695 bytes
[WPA] Size of mmap'd section jmpfuncs: 2332150 bytes
[WPA] Size of mmap'd section pureconst: 170292 bytes
[WPA] Size of mmap'd section profile: 17986 bytes
[WPA] Size of mmap'd section symbol_nodes: 3393358 bytes
[WPA] Size of mmap'd section inline: 2567939 bytes
[WPA] Size of mmap'd section icf: 435633 bytes
[WPA] Size of mmap'd section lto: 4320 bytes
[WPA] Size of mmap'd section ipa_sra: 651824 bytes
so results in about 22% reduction in global decl stream and 24% reduction on
function bodies stream (which is read mostly by ICF)
Martin, the zstd compression breaks the compression statistics (it works when
GCC is configured for zlib)
At first ltrans I get:
[LTRANS] Size of mmap'd section decls: 3734248 bytes
[LTRANS] Size of mmap'd section function_body: 4895962 bytes
... to ...
[LTRANS] Size of mmap'd section decls: 3479850 bytes
[LTRANS] Size of mmap'd section function_body: 3722935 bytes
So 7% reduction of global stream and 31% reduction of function bodies.
Stream in seems to get about 3% faster and stream out about 5% but it is
close to noise factor of my experiment. I expect bigger speedups on
Firefox but I did not test it today since my Firefox setup broke again.
GCC is not very good example on the problem with anonymous namespace
types since we do not have so many of them.
Sice of object files in gcc directory is reduced by 11% (because hash
numbers do not compress well I guess).
The patch makes DFS walk to recognize trees that are not merged (anonymous
namespace, local function/variable decls, anonymous types etc). As discussed
on IRC this is now done during the SCC walk rather than during the hash
computation. When local tree is discovered we know that SCC components of everything that is on
the stack reffers to it and thus is also local. Moreover we mark trees into hash set in output block
so if we get a cross edge referring to local tree it gets marked too.
Patch also takes care of avoiding SCC wrappers around some trees. In particular
1) singleton unmergeable SCCs are now streamed inline in global decl stream
This includes INTEGER_CSTs and IDENTIFIER_NODEs that are shared by different
code than rest of tree merging.
2) We use LTO_trees instead of LTO_tree_scc to wrap unmergeable SCC components.
It is still necessary to mark them because of forward references. LTO_trees
has simple header with number of trees and then things are streamed same way
as for LTO_tree_scc. That is tree headers first followed by pickled references
so things may point to future.
Of course it is not necessary for LTO_tree_scc to be single component and
streamer out may group more components together, but I decided to not snowball
the patch even more
3) In local streams when lto_output_tree is called and the topmost SCC components
turns out to be singleton we stream the tree directly
instead of LTO_tree_scc, hash code, pickled tree, reference to just stremaed tree.
LTO_trees is used to wrap all trees needed to represent tree being streamed.
It would make sense again to use only one LTO_trees rather than one per SCC
but I think this can be done incrementally.
In general local trees are now recognized by new predicate local_tree_p
Bit subtle is handing of TRANLSATION_UNIT_DECL, INTEGER_CST and
IDENTIFIER_NODE.
TRANSLATION_UNIT_DECL a local tree but references to it does not make
other trees local (because we also understand local decls now).
So I check for it later after localness propagation is done.
INTEGER_CST and IDENTIFIER_NODEs are merged but not via the tree merging
machinery. So it makes sense to stream them as unmergeable trees but we
still need to compute their hashes so SCCs referring them do not get too
large collision chains. For this reason they are checked just prior
stream out.
lto-bootstrapped/regteted x86_64-linux, OK?
gcc/ChangeLog:
2020-05-19 Jan Hubicka <hubicka@ucw.cz>
* lto-streamer-in.c (lto_input_scc): Add SHARED_SCC parameter.
(lto_input_tree_1): Strenghten sanity check.
(lto_input_tree): Update call of lto_input_scc.
* lto-streamer-out.c: Include ipa-utils.h
(create_output_block): Initialize local_trees if merigng is going
to happen.
(destroy_output_block): Destroy local_trees.
(DFS): Add max_local_entry.
(local_tree_p): New function.
(DFS::DFS): Initialize and maintain it.
(DFS::DFS_write_tree): Decide on streaming format.
(lto_output_tree): Stream inline singleton SCCs
* lto-streamer.h (enum LTO_tags): Add LTO_trees.
(struct output_block): Add local_trees.
(lto_input_scc): Update prototype.
gcc/lto/ChangeLog:
2020-05-19 Jan Hubicka <hubicka@ucw.cz>
* lto-common.c (compare_tree_sccs_1): Sanity check that we never
read TRANSLATION_UNIT_DECL.
(process_dref): Break out from ...
(unify_scc): ... here.
(process_new_tree): Break out from ...
(lto_read_decls): ... here; handle streaming of singleton trees.
(print_lto_report_1): Update statistics.
Mark Eggleston [Thu, 7 May 2020 07:02:02 +0000 (08:02 +0100)]
Fortran : ProcPtr function results: 'ppr@' in error message PR39695
The value 'ppr@' is set in the name of result symbol, the actual
name of the symbol is in the procedure name symbol pointed
to by the result symbol's namespace (ns). When reporting errors for
symbols that have the proc_pointer attribute check whether the
result attribute is set and set the name accordingly.
2020-05-20 Mark Eggleston <markeggleston@gcc.gnu.org>
gcc/fortran/
PR fortran/39695
* resolve.c (resolve_fl_procedure): Set name depending on
whether the result attribute is set. For PROCEDURE/RESULT
conflict use the name in sym->ns->proc_name->name.
* symbol.c (gfc_add_type): Add check for function and result
attributes use sym->ns->proc_name->name if both are set.
Where the symbol cannot have a type use the name in
sym->ns->proc_name->name.
2020-05-20 Mark Eggleston <markeggleston@gcc.gnu.org>
gcc/testsuite/
PR fortran/39695
* gfortran.dg/pr39695_1.f90: New test.
* gfortran.dg/pr39695_2.f90: New test.
* gfortran.dg/pr39695_3.f90: New test.
* gfortran.dg/pr39695_4.f90: New test.
Nathan Sidwell [Wed, 20 May 2020 13:21:10 +0000 (06:21 -0700)]
preprocessor: Replace some flags with a single enum
_cpp_find_file has 3 bool arguments, at most one of which is ever set.
Ripe for replacing with a 4-state enum. Also, this is C++, so
'typedef struct Foo Foo' is unnecessary.
* internal.h (typedef _cpp_file): Delete, unnecessary in C++.
(enum _cpp_find_file_kind): New.
(_cpp_find_file): Use it, not 3 bools.
* files.c (_cpp_find_file): Use _cpp_find_file_kind enum, not
bools.
(cpp_make_system_header): Break overly long line.
(_cpp_stack_include, _cpp_fake_include)
(_cpp_do_file_change, _cpp_compare_file_date, _cpp_has_header): Adjust.
* init.c (cpp_read_main): Adjust _cpp_find_file call.
Patrick Palka [Wed, 20 May 2020 13:15:48 +0000 (09:15 -0400)]
c++: spec_hasher and TYPENAME_TYPE resolution [PR95223]
After enabling sanitization of the specialization tables, we are
triggering one of the hash table sanity checks in the below testcase.
The reason is that when looking up the specialization j<int> in the
type_specializations table, the sanity check finds that the existing
entry j<n<t>::m> compares equal to j<int> but hashes differently.
The discrepancy is due to structural_comptypes looking through
TYPENAME_TYPEs (via resolve_typename_type), something which
iterative_hash_template_arg doesn't do. So the TYPENAME_TYPE n<t>::m is
considered equal to int, but the hashes of these two template arguments
are different.
It seems wrong for the result of a specialization table lookup to depend
on the current scope, so this patch makes structural_comptypes avoid
calling resolve_typename_type when comparing_specializations.
In order for the below testcase to deterministically trigger the
sanitization error without this patch, we also need to fix the location
of the call to hash_table::verify within hash_table::find_with_hash.
gcc/ChangeLog:
PR c++/95223
* hash-table.h (hash_table::find_with_hash): Move up the call to
hash_table::verify.
gcc/cp/ChangeLog:
PR c++/95223
* typeck.c (structural_comptypes): Don't perform
context-dependent resolution of TYPENAME_TYPEs when
comparing_specializations.
gcc/testsuite/ChangeLog:
PR c++/95223
* g++.dg/template/typename23.C: New test.
Richard Biener [Wed, 20 May 2020 07:22:58 +0000 (09:22 +0200)]
tree-optimization/95219 - improve IV selection for induction
This improves code generation with SSE2 for the testcase by
making sure to only generate a single IV when the group size
is a multiple of the vector size. It also adjusts the testcase
which was passing before.
2020-05-20 Richard Biener <rguenther@suse.de>
PR tree-optimization/95219
* tree-vect-loop.c (vectorizable_induction): Reduce
group_size before computing the number of required IVs.
Richard Biener [Wed, 20 May 2020 09:00:57 +0000 (11:00 +0200)]
middle-end/95231 - revert parts of PR95171
I mistook the opportunity to also "fix" the [VEC_]COND_EXPR case
for PR95171 but I was wrong in that it doesn't need the fix and
in the actual fix as well. The following just reverts that part.
2020-05-20 Richard Biener <rguenther@suse.de>
PR middle-end/95231
* tree-inline.c (remap_gimple_stmt): Revert adjusting
COND_EXPR and VEC_COND_EXPR for a -fnon-call-exception boundary.
[ARM]: Fix the wrong code-gen generated by MVE vector load/store intrinsics (PR94959).
Few MVE intrinsics like vldrbq_s32, vldrhq_s32 etc., the assembler instructions
generated by current compiler are wrong.
eg: vldrbq_s32 generates an assembly instructions `vldrb.s32 q0,[ip]`.
But as per Arm-arm second argument in above instructions must also be a low
register (<= r7). This patch fixes this issue by creating a new predicate
"mve_memory_operand" and constraint "Ux" which allows low registers as arguments
to the generated instructions depending on the mode of the argument. A new constraint
"Ul" is created to handle loading to PC-relative addressing modes for vector
store/load intrinsiscs.
All the corresponding MVE intrinsic generating wrong code-gen as vldrbq_s32
are modified in this patch.
gcc/ChangeLog:
2020-05-20 Srinath Parvathaneni <srinath.parvathaneni@arm.com>
Andre Vieira <andre.simoesdiasvieira@arm.com>
PR target/94959
* config/arm/arm-protos.h (arm_mode_base_reg_class): Function
declaration.
(mve_vector_mem_operand): Likewise.
* config/arm/arm.c (thumb2_legitimate_address_p): For MVE target check
the load from memory to a core register is legitimate for give mode.
(mve_vector_mem_operand): Define function.
(arm_print_operand): Modify comment.
(arm_mode_base_reg_class): Define.
* config/arm/arm.h (MODE_BASE_REG_CLASS): Modify to add check for
TARGET_HAVE_MVE and expand to arm_mode_base_reg_class on TRUE.
* config/arm/constraints.md (Ux): Likewise.
(Ul): Likewise.
* config/arm/mve.md (mve_mov): Replace constraint Us with Ux and also
add support for missing Vector Store Register and Vector Load Register.
Add a new alternative to support load from memory to PC (or label) in
vector store/load.
(mve_vstrbq_<supf><mode>): Modify constraint Us to Ux.
(mve_vldrbq_<supf><mode>): Modify constriant Us to Ux, predicate to
mve_memory_operand and also modify the MVE instructions to emit.
(mve_vldrbq_z_<supf><mode>): Modify constraint Us to Ux.
(mve_vldrhq_fv8hf): Modify constriant Us to Ux, predicate to
mve_memory_operand and also modify the MVE instructions to emit.
(mve_vldrhq_<supf><mode>): Modify constriant Us to Ux, predicate to
mve_memory_operand and also modify the MVE instructions to emit.
(mve_vldrhq_z_fv8hf): Likewise.
(mve_vldrhq_z_<supf><mode>): Likewise.
(mve_vldrwq_fv4sf): Likewise.
(mve_vldrwq_<supf>v4si): Likewise.
(mve_vldrwq_z_fv4sf): Likewise.
(mve_vldrwq_z_<supf>v4si): Likewise.
(mve_vld1q_f<mode>): Modify constriant Us to Ux.
(mve_vld1q_<supf><mode>): Likewise.
(mve_vstrhq_fv8hf): Modify constriant Us to Ux, predicate to
mve_memory_operand.
(mve_vstrhq_p_fv8hf): Modify constriant Us to Ux, predicate to
mve_memory_operand and also modify the MVE instructions to emit.
(mve_vstrhq_p_<supf><mode>): Likewise.
(mve_vstrhq_<supf><mode>): Modify constriant Us to Ux, predicate to
mve_memory_operand.
(mve_vstrwq_fv4sf): Modify constriant Us to Ux.
(mve_vstrwq_p_fv4sf): Modify constriant Us to Ux and also modify the MVE
instructions to emit.
(mve_vstrwq_p_<supf>v4si): Likewise.
(mve_vstrwq_<supf>v4si): Likewise.Modify constriant Us to Ux.
* config/arm/predicates.md (mve_memory_operand): Define.
Martin Liska [Wed, 20 May 2020 09:05:23 +0000 (11:05 +0200)]
git_commit.py: Add tests for signatures.
* gcc-changelog/git_commit.py: Refactor to make flake8 happy.
* gcc-changelog/test_email.py: Add new test.
* gcc-changelog/test_patches.txt: Add new patch.
Frederik Harwath [Tue, 19 May 2020 09:15:28 +0000 (11:15 +0200)]
contrib/gcc-changelog: Skip over review lines
git-check-commit.py does not know about "Reviewed-by",
"Reviewed-on", and "Signed-off-by" lines and hence it
expects those lines which follow the ChangeLog entries
to be indented by a tab.
This commit makes the script skip those lines. No further
processing is attempted because the review information
is not part of the ChangeLogs.
contrib/
2020-05-20 Frederik Harwath <frederik@codesourcery.com>
* gcc-changelog/git_commit.py: Skip over lines starting
with "Reviewed-by: ", "Reviewed-on: ", or "Signed-off-by: "
Martin Liska [Wed, 20 May 2020 07:57:05 +0000 (09:57 +0200)]
Add gcc-backport and support git cherry pick.
* gcc-changelog/git_commit.py: Support cherry pick
prefix.
* gcc-changelog/test_email.py: Test it.
* gcc-changelog/test_patches.txt: Add new patch.
* gcc-git-customization.sh: Add gcc-backport.
Richard Biener [Tue, 19 May 2020 05:58:33 +0000 (07:58 +0200)]
c/95141 - fix bogus integer overflow warning
This fixes an integer overflow warning that ultimatively happens because
of TREE_OVERFLOW propagating through transforms and the existing guard
against this,
being insufficient. Rather than trying to use sth like walk_tree to
exhaustively walk operands (with the possibility of introducing
quadraticness when folding larger expressions recursively) the
following amends the above with an ad-hoc test for a binary op0
with a possibly constant op1.
2020-05-30 Richard Biener <rguenther@suse.de>
PR c/95141
gcc/c
* c-fold.c (c_fully_fold_internal): Enhance guard on
overflow_warning.
Kito Cheng [Tue, 14 Apr 2020 06:53:19 +0000 (14:53 +0800)]
Fix alignment for local variable [PR90811]
- The alignment for local variable was adjust during estimate_stack_frame_size,
however it seems wrong spot to adjust that, expand phase will adjust that
but it little too late to some gimple optimization, which rely on certain
target hooks need to check alignment, forwprop is an example for
that, result of simplify_builtin_call rely on the alignment on some
target like ARM or RISC-V.
- Exclude static local var and hard register var in the process of
alignment adjustment.
- This patch fix gfortran.dg/pr45636.f90 for arm and riscv.
- Regression test on riscv32/riscv64 and x86_64-linux-gnu, no new fail
introduced.
Jonathan Wakely [Tue, 19 May 2020 15:49:21 +0000 (16:49 +0100)]
libstdc++: Use RDRAND as fallback if RDSEED keeps failing (PR 94087)
It's not difficult for multiple threads to drain the entropy available
to the RDSEED instruction, at which point we throw an exception. This
change will try to use RDRAND after RDSEED fails repeatedly, and only
throw if RDRAND also fails repeatedly. This doesn't guarantee a random
value can always be read, but reduces the likelihood of failure when
using the RDSEED instruction.
PR libstdc++/94087
* src/c++11/random.cc (__x86_rdseed): Allow fallback function to be
passed in.
(__x86_rdseed_rdrand): New function that uses rdseed with rdrand
fallback.
(random_device::_M_init): Use __x86_rdseed_rdrand when both
instructions are available.
* testsuite/26_numerics/random/random_device/94087.cc: New test.
H.J. Lu [Tue, 19 May 2020 21:42:12 +0000 (14:42 -0700)]
x86: Add FEATURE_AVX512VP2INTERSECT and update GFNI check
Add FEATURE_AVX512VP2INTERSECT to libgcc so that enum processor_features
in libgcc matches enum processor_features in i386-builtins.c. Update
GFNI check to support processors with SSE and AVX versions of GFNI.
Nathan Sidwell [Tue, 19 May 2020 20:29:19 +0000 (13:29 -0700)]
c++: Alias template instantiation template info
I discovered that the alias instantiation machinery would setup
template_info, and then sometime later overwrite that with equivalent
info. This broke modules, because the template info, once set, is
logically immutable. Let's just not do that.
* pt.c (lookup_template_class_1): Do not reinit template_info of an
alias here.
Nathan Sidwell [Tue, 19 May 2020 20:20:32 +0000 (13:20 -0700)]
preprocessor: Random cleanups
This fixes a bunch of poorly formatted decls, marks some getters as
PURE, deletes some C-relevant bool hackery, and finally uses a
passed-in location rather than deducing a closely-related but not
necessarily the same location.
* include/cpplib.h (cpp_get_otions, cpp_get_callbacks)
(cpp_get_deps): Mark as PURE.
* include/line-map.h (get_combined_adhoc_loc)
(get_location_from_adhoc_loc, get_pure_location): Reformat decls.
* internal.h (struct lexer_state): Clarify comment.
* system.h: Remove now-unneeded bool hackery.
* files.c (_cpp_find_file): Store LOC not highest_location.
This fixes PR94591. The problem was the function aarch64_evpc_rev_local()
matching vector permutations that were not reversals. In particular, prior to
this patch, this function matched the identity permutation which led to
generating bogus REV64 insns which were rejected by the assembler.
gcc/
PR target/94591
* config/aarch64/aarch64.c (aarch64_evpc_rev_local): Don't match
identity permutation.
gcc/testsuite/
PR target/94591
* gcc.c-torture/execute/pr94591.c: New test.
Nathan Sidwell [Tue, 19 May 2020 18:28:05 +0000 (11:28 -0700)]
preprocessor: Reimplement raw string lexing [pr95149]
pr95149 is a false positive static analysis checker. But it
encouranged me to fix raw string lexing, which does contain a
complicated macro and pointers to local variables. The
reimplementation does away with that macro. Part of the complication
is we need to undo some of the fresh line processing -- trigraph notes
and escaped line continuations. But the undone characters need to go
through the raw string processing, as they can legitimately be part of
the prefix marker. however, in this reformulation we only process one
line marker at a time[*], so there's a limited number of undone
characters. We can arrange the buffering to make sure we don't split
such an append sequence, and then simply take the characters from the
append buffer.
The prefix scanner had a switch statement, which I discovered was not
optimized as well as an if of a bunch of explicit comparisons (pr
95208 filed).
Finally I adjusted the failure mode. When we get a bad prefix, we lex
up until the next '"', thus often swallowing the whole raw string.
Previously we'd bail and then the lexer would usually generate stupid
tokens, particularly when meeting the ending '"'.
libcpp/
* lex.c (struct lit_accum): New.
(bufring_append): Replace by lit_accum::append.
(lex_raw_string): Reimplement, using fragments of the old version.
(lex_string): Adjust lex_raw_string call.
Nathan Sidwell [Tue, 19 May 2020 13:11:22 +0000 (06:11 -0700)]
preprocessor: Fix ICE with EOF in macro args [pr95182]
This was another latent case of us losing an EOF token, but succeeding
anyway. Since my patch to make us pay more attention to EOFs it came
to light. We also need to keep the EOF if we fall off the end of the
main file. Forced includes look like regular nested includes at this
point.
PR preprocessor/95182
libcpp/
* macro.c (collect_args): Preserve EOFif we fell out of the main
file.
(cpp_get_token_1): Reformat a couple of short lines.
2020-05-19 Jozef Lawrynowicz <jozef.l@mittosystems.com>
* doc/sourcebuild.texi: Document new short_eq_int, ptr_eq_short,
msp430_small, msp430_large and size24plus DejaGNU effective
targets.
Improve grammar in descriptions for size20plus and size32plus effective
targets.
gcc/testsuite/ChangeLog:
2020-05-19 Jozef Lawrynowicz <jozef.l@mittosystems.com>
* c-c++-common/builtin-has-attribute-7.c: Require size24plus.
* c-c++-common/cpp/pr63831-1.c: Store result in _has_cpp_attribute in a
long.
* c-c++-common/pr81376.c: Skip scan-tree-dump for short_eq_int. Extend
test for short_eq_int.
* g++.dg/abi/scoped1.C: Skip dg-warning tests for short_eq_int.
* g++.dg/cpp0x/constexpr-70001-1.C: Require size24plus.
* g++.dg/cpp0x/constexpr-bitfield3.C: Require int32plus.
* g++.dg/cpp0x/enum13.C: Skip dg-warning for short_eq_int.
* g++.dg/cpp0x/initlist5.C: Add dg-error for short_eq_int.
* g++.dg/cpp0x/initlist7.C: Add dg-warning for !int32plus.
* g++.dg/cpp0x/nullptr04.C: Skip dg-error for ptr_eq_short.
* g++.dg/cpp0x/variadic-value1.C: Add typedef for int32_t.
* g++.dg/cpp1y/constexpr-arith-overflow.C: Fix test for
sizeof(int) == sizeof(short).
* g++.dg/cpp1y/digit-sep-neg.C: Add typedef for int32_t.
* g++.dg/cpp1y/pr57644.C: Add typedef for uint32_t.
* g++.dg/cpp1y/pr77321.C: Require size24plus.
* g++.dg/cpp1y/var-templ4.C: Add typedef for int32_t.
* g++.dg/cpp1z/direct-enum-init1.C: Skip dg-error for short_eq_int.
* g++.dg/delayedfold/fwrapv1.C: Skip for int16.
* g++.dg/expr/bitfield9.C: Add typedef for int32_t.
* g++.dg/ext/attribute-test-1.C: Add typedef for uint32_t.
* g++.dg/ext/bitfield1.C: Add typedef for int32_t.
* g++.dg/ext/flexary13.C: Add typedef for int32_t.
* g++.dg/ext/utf-cvt.C: Adjust dg-warning for int16.
* g++.dg/ext/vector28.C: Add typedef for int32_t.
* g++.dg/ext/vla15.C: Add typedef for int32_t.
* g++.dg/init/array11.C: Require size32plus.
* g++.dg/init/array15.C: Require size24plus.
* g++.dg/init/array4.C: Require size20plus.
* g++.dg/init/const7.C: Skip dg-message for ptr_eq_short.
* g++.dg/init/new38.C: Relax regex in dg-error.
* g++.dg/init/new44.C: Skip dg-error for msp430_small.
Adjust test for 16-bit size_t.
Add special case for msp430 -mlarge.
* g++.dg/init/value9.C: Add typedef for int32_t.
* g++.dg/ipa/pr77333.C: Add typedef for int32_t.
* g++.dg/lto/20080908-1_0.C: Add typedef for int32_t.
* g++.dg/opt/pr55717.C: Add typedef for uint32_t.
* g++.dg/opt/pr60597.C: Add typedef for int32_t.
* g++.dg/opt/pr81715.C: Require size20plus.
* g++.dg/opt/reload3.C: Add typedef for uint32_t.
* g++.dg/opt/temp2.C: Require size20plus.
* g++.dg/opt/thunk1.C: Likewise.
* g++.dg/other/error23.C: Dont assume __SIZEOF_INT__ == 4.
* g++.dg/other/pr31078.C: Adjust typedef for 32-bit int.
* g++.dg/parse/concat1.C: Skip dg-error for size20plus.
* g++.dg/parse/defarg5.C: Add typedef for int32_t and uint32_t.
* g++.dg/pr48484.C: Add typedef for int32_t.
* g++.dg/pr53037-2.C: Likewise.
* g++.dg/pr53037-3.C: Likewise.
* g++.dg/pr66655.C: Use int32_t.
* g++.dg/pr66655.h: Add typedef for int32_t.
* g++.dg/pr66655_1.cc: Use int32_t.
* g++.dg/pr67351.C: Define 32-bit uint.
* g++.dg/template/array30.C: Add typedef for int32_t.
* g++.dg/template/constant1.C: Extend test for 8-bit and 16-bit int.
* g++.dg/template/constant2.C: Likewise.
* g++.dg/template/friend18.C: Add typedef for int32_t.
* g++.dg/template/pr68978.C: Likewise.
* g++.dg/torture/pr37421.C: Require int_eq_float.
* g++.dg/torture/pr88861.C: Handle 16-bit int.
* g++.dg/tree-ssa/pr19807.C: Likewise.
* g++.dg/tree-ssa/pr27291.C: Fix typedef for uint32_t.
* g++.dg/tree-ssa/pr49516.C: Fix typedefs for int{16,32}_t and
uint{32,64}_t.
* g++.dg/warn/Wconversion-integer.C: Add typedefs for {u,}int32_t.
* g++.dg/warn/Wconversion-null-2.C: Adjust g() declaration.
* g++.dg/warn/Wconversion-null.C: Likewise.
* g++.dg/warn/Wconversion3.C: Skip dg-warning for short_eq_int.
* g++.dg/warn/Wduplicated-branches1.C: Add dg-warning for short_eq_int.
* g++.dg/warn/Wplacement-new-size-5.C: Add typedef for int32_t.
* g++.dg/warn/Wplacement-new-size.C: Likewise.
* g++.dg/warn/Wstrict-aliasing-5.C: Add typedef for uint32_t.
* g++.dg/warn/Wstrict-aliasing-bogus-signed-unsigned.C: Add typedef for
{u,}int32_t.
* g++.dg/warn/Wtype-limits-Wextra.C: Adjust dg-warning for
short_eq_int.
* g++.dg/warn/Wtype-limits.C: Likewise.
* g++.old-deja/g++.brendan/enum11.C: Add typedef for uint32_t.
* g++.old-deja/g++.bugs/900227_01.C: Skip dg-error for ptr_eq_short.
* g++.old-deja/g++.mike/ns15.C: Require size20plus.
* g++.old-deja/g++.other/exprstmt1.C: Add typedef for uint32_t.
* g++.old-deja/g++.other/inline12.C: Adjust udword typedef.
* g++.old-deja/g++.other/new6.C: Add typedef for int32_t.
* g++.old-deja/g++.pt/crash16.C: Skip for int16.
* g++.old-deja/g++.robertl/eb76.C: Likewise.
* g++.old-deja/g++.warn/flow1.C: Add typedef for int32_t.
* gcc.dg/Walloca-14.c: Adjust -Walloca-larger-than= parameter for
!ptr32plus.
* gcc.dg/Warray-bounds-32.c: Adjust dg-warning for size20plus.
* gcc.dg/Wbuiltin-declaration-mismatch-4.c: Adjust dg-warning for
short_eq_int.
Handle case where ptrdiff_t/size_t is __int20.
* gcc.dg/concat2.c: Skip dg-error for size20plus.
* gcc.dg/fold-convmaxconv-1.c: Add typedef for {u,}int32_t.
* gcc.dg/fold-convminconv-1.c: Likewise.
* gcc.dg/graphite/scop-4.c: Require size20plus.
* gcc.dg/loop-versioning-1.c: Adjust test for small size_t.
* gcc.dg/loop-versioning-2.c: Require size20plus.
* gcc.dg/lto/20081210-1_0.c: Adjust typedef for uintptr_t.
* gcc.dg/lto/pr85870_0.c: Add typedef for uint32_t.
* gcc.dg/lto/pr85870_1.c: Likewise.
* gcc.dg/pr36227.c: Adjust typedef for ptrcast.
* gcc.dg/pr42611.c: First check for size_t equality with void *
before trying other types.
* gcc.dg/pr59963-2.c: Skip dg-warning for int16 instead of
xfail.
* gcc.dg/pr68317.c: Add typedef for int32_t.
* gcc.dg/pr78973.c: Adjust dg-warning for int16.
* gcc.dg/pr85859.c: Cast using __INTPTR_TYPE__ instead of long.
* gcc.dg/pr86179.c: Add typedef for {u,}int32_t.
* gcc.dg/torture/20181024-1.c: Require size32plus.
* gcc.dg/torture/pr71598-2.c: Skip for short_eq_int.
* gcc.dg/torture/pr86034.c: Add typedef for int32_t.
* gcc.dg/tree-ssa/builtin-sprintf-warn-3.c: Adjust dg-warning
for int16 and msp430 -mlarge.
* gcc.dg/tree-ssa/integer-addr.c: Use __INTPTR_MAX__ for a large
constant that is a valid address.
* gcc.dg/tree-ssa/loop-interchange-10.c: Add typedef for
int32_t.
* gcc.dg/tree-ssa/pr84436-3.c: Adjust dg-final for int16.
* gcc.dg/tree-ssa/pr84648.c: Add typedef for uint32_t.
* gcc.dg/tree-ssa/scev-8.c: Cast to char if sizeof(int) ==
sizeof(short).
* gcc.dg/tree-ssa/ssa-dom-thread-8.c: Adjust test for msp430 -mlarge.
* lib/target-supports.exp (check_effective_target_size24plus): New.
(check_effective_target_short_eq_int): New.
(check_effective_target_ptr_eq_short): New.
(check_effective_target_msp430_small): New.
(check_effective_target_msp430_large): New.
git://gcc.gnu.org / gcc.git / log