match.sh was not correctly handling build constraints for Go versions
that have a two-digit suffix, like "go1.10".
The same issue will arise with Go 1.100, but that is a long ways off.
Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/260077
This improves the heuristics finding a sink location for loads that does
not cross any store.
2020-10-07 Richard Biener <rguenther@suse.de>
PR tree-optimization/97307
* tree-ssa-sink.c (statement_sink_location): Change heuristic
for not skipping stores to look for virtual definitions
rather than uses.
* gcc.dg/tree-ssa/ssa-sink-17.c: New testcase.
* gcc.dg/vect/pr65947-3.c: XFAIL.
cp_tree_equal currently considers alignof the same as __alignof__, but
these operators are semantically different ever since r8-7957. In the
testcase below, this causes the second static_assert to fail on targets
where alignof(double) != __alignof__(double) because the specialization
table (which uses cp_tree_equal as its equality predicate) conflates the
two dependent specializations integral_constant<__alignof__(T)> and
integral_constant<alignof(T)>.
This patch makes cp_tree_equal distinguish between these two operators
by inspecting the ALIGNOF_EXPR_STD_P flag.
gcc/cp/ChangeLog:
PR c++/88115
PR libstdc++/97273
* tree.c (cp_tree_equal) <case ALIGNOF_EXPR>: Return false if
ALIGNOF_EXPR_STD_P differ.
gcc/testsuite/ChangeLog:
PR c++/88115
PR libstdc++/97273
* g++.dg/template/alignof3.C: New test.
Allocate the memory in an approved portable way.
gcc/ChangeLog:
2020-10-06 Andrew MacLeod <amacleod@redhat.com>
* value-range.h (irange_allocator::allocate): Allocate in two hunks
instead of using the variably-sized trailing array approach.
2020-07-10 Paul Thomas <pault@gcc.gnu.org>
gcc/fortran
PR fortran/47469
* trans-expr.c (arrayfunc_assign_needs_temporary): Tidy detection
of pointer and allocatable functions.
The path-printing default of -fdiagnostics-path-format=inline-events
interacted poorly with -fdiagnostics-plain-output, so it makes most
sense to add -fdiagnostics-path-format=separate-events to
-fdiagnostics-plain-output.
Seen when adding an experimental analyzer plugin to gcc.dg/plugin.exp.
gcc/ChangeLog:
* doc/invoke.texi (-fdiagnostics-plain-output): Add
-fdiagnostics-path-format=separate-events to list of
options injected by -fdiagnostics-plain-output.
* opts-common.c (decode_cmdline_options_to_array): Likewise.
gcc/testsuite/ChangeLog:
* g++.dg/analyzer/analyzer.exp (DEFAULT_CXXFLAGS): Remove
-fdiagnostics-path-format=separate-events.
* gcc.dg/analyzer/analyzer.exp (DEFAULT_CFLAGS): Likewise.
* gcc.dg/plugin/diagnostic-path-format-default.c: Rename to...
* gcc.dg/plugin/diagnostic-path-format-plain.c: ...this. Remove
dg-options directive. Copy remainder of test from
diagnostic-path-format-separate-events.c.
* gcc.dg/plugin/diagnostic-test-paths-2.c: Add
-fdiagnostics-path-format=inline-events to options.
Fix expected output for location of conditional within "for" loop.
* gcc.dg/plugin/plugin.exp (plugin_test_list): Update for
renaming.
* gfortran.dg/analyzer/analyzer.exp (DEFAULT_FFLAGS): Remove
-fdiagnostics-path-format=separate-events.
This patch improves block-scope extern handling by always injecting a
hidden copy into the enclosing namespace (or using a match already
there). This hidden copy will be revealed if the user explicitly
declares it later. We can get from the DECL_LOCAL_DECL_P local extern
to the alias via DECL_LOCAL_DECL_ALIAS. This fixes several bugs and
removes the kludgy per-function extern_decl_map. We only do this
pushing for non-dependent local externs -- dependent ones will be
pushed during instantiation.
User code that expected to be able to handle incompatible local
externs in different block-scopes will no longer work. That code is
ill-formed. (always was, despite what 31775 claimed). I had to
adjust a number of testcases that fell into this.
I tried using DECL_VALUE_EXPR, but that didn't work out. Due to
constexpr requirements we have to do the replacement very late (it
happens in the gimplifier). Consider:
extern int l[]; // #1
constexpr bool foo ()
{
extern int l[3]; // this does not complete the type of decl #1
constexpr int *p = &l[2]; // ok
return !p;
}
This requirement, coupled with our use of the common folding machinery
makes pr97306 hard to fix, as we end up with an expression containing
the two different decls for 'l', and only the c++ FE knows how to
reconcile those. I punted on this.
gcc/cp/
* cp-tree.h (struct language_function): Delete extern_decl_map.
(DECL_LOCAL_DECL_ALIAS): New.
* name-lookup.h (is_local_extern): Delete.
* name-lookup.c (set_local_extern_decl_linkage): Replace with ...
(push_local_extern_decl): ... this new function.
(do_pushdecl): Call new function after pushing new decl. Unhide
hidden non-functions.
(is_local_extern): Delete.
* decl.c (layout_var_decl): Do not allow VLA local externs.
* decl2.c (mark_used): Also mark DECL_LOCAL_DECL_ALIAS. Drop old
local-extern treatment.
* parser.c (cp_parser_oacc_declare): Deal with local extern aliases.
* pt.c (tsubst_expr): Adjust local extern instantiation.
* cp-gimplify.c (cp_genericize_r): Remap DECL_LOCAL_DECLs.
gcc/testsuite/
* g++.dg/cpp0x/lambda/lambda-sfinae1.C: Avoid ill-formed local extern
* g++.dg/init/pr42844.C: Add expected error.
* g++.dg/lookup/extern-redecl1.C: Likewise.
* g++.dg/lookup/koenig15.C: Avoid ill-formed.
* g++.dg/lto/pr95677.C: New.
* g++.dg/other/nested-extern-1.C: Correct expected behabviour.
* g++.dg/other/nested-extern-2.C: Likewise.
* g++.dg/other/nested-extern.cc: Split ...
* g++.dg/other/nested-extern-1.cc: ... here ...
* g++.dg/other/nested-extern-2.cc: ... here.
* g++.dg/template/scope5.C: Avoid ill-formed
* g++.old-deja/g++.law/missed-error2.C: Allow extension.
* g++.old-deja/g++.pt/crash3.C: Add expected error.
As the FIXME which this patch removes states, the current code does
not work when a call with multiple speculative targets gets resolved
through parameter tracking during inlining - it feeds the inliner an
edge it has already dealt with. The patch makes the code which should
prevent it aware of the possibility that that speculation can have
more than one target now.
gcc/ChangeLog:
2020-09-30 Martin Jambor <mjambor@suse.cz>
PR ipa/96394
* ipa-prop.c (update_indirect_edges_after_inlining): Do not add
resolved speculation edges to vector of new direct edges even in
presence of multiple speculative direct edges for a single call.
gcc/testsuite/ChangeLog:
2020-09-30 Martin Jambor <mjambor@suse.cz>
PR ipa/96394
* gcc.dg/tree-prof/pr96394.c: New test.
I realized I'd misnamed DECL_BUILTIN_P, it's only true of compiler
builtins unless and until the user declares them -- at that point
they're real decls, and will have a location in the user's source.
(BUILT_IN_FN and friends still work though). This renames them so
future-me is not confused as to why the predicate becomes false.
gcc/cp/
* cp-tree.h (DECL_BUILTIN_P): Rename to ...
(DECL_UNDECLARED_BUILTIN_P): ... here.
* decl.c (duplicate_decls): Adjust.
* name-lookup.c (anticipated_builtin_p): Adjust.
(do_nonmember_using_decl): Likewise.
libcc1/
* libcp1plugin.cc (supplement_binding): Rename
DECL_BUILTIN_P.
Making an exception variant can cause a non-dependent function type to
become dependent (since c++17 eh-specs are part of the type). The
same is (possibly?) true for adding a late return type. Fixed thusly.
My upcoming local extern-decl changes have a test case that covers
this (which was how I found it).
gcc/cp/
* tree.c (build_cp_fntype_variant): Clear
TYPE_DEPENDENT_P_VALID if necessary.
Allow addptr to use SPGRs as well as VGPRs for pointers. This ought to
prevent some unnecessary copying back and forth.
gcc/ChangeLog:
* config/gcn/gcn.md (unspec): Add UNSPEC_ADDPTR.
(addptrdi3): Add SGPR alternative.
DWARF5 has a new string table specially for file paths. .debug_line
file and dir tables reference strings in .debug_line_str. If a
.debug_line_str section is emitted then also place CU DIE file
names and comp dirs there.
gcc/ChangeLog:
* dwarf2out.c (add_filepath_AT_string): New function.
(asm_outputs_debug_line_str): Likewise.
(add_filename_attribute): Likewise.
(add_comp_dir_attribute): Call add_filepath_AT_string.
(gen_compile_unit_die): Call add_filename_attribute for name.
(init_sections_and_labels): Init debug_line_str_section when
asm_outputs_debug_line_str return true.
(dwarf2out_early_finish): Remove DW_AT_name and DW_AT_comp_dir
hack and call add_filename_attribute for the remap_debug_filename.
> > As for the test assembly, I'd say we should take
> > #define F void foo (void) {}
> > F
> > compile it with
> > gcc -S -O2 -g1 -dA -gno-as-loc-support -fno-merge-debug-strings
> > remove .cfi_* directives, remove the ret instruction, change @function
> > and @progbits to %function and %progbits, change .uleb128 to just .byte,
> > I think all the values should be small enough, maybe change .value to
> > .2byte and .long to .4byte (whatever is most portable across different
> > arches and gas versions), simplify (shorten) strings and adjust
> > sizes, and do something with the .quad directives, that is dependent on
> > the address size, perhaps just take those attributes out and adjust
> > .debug_abbrev? Finally, remove all comments (emit them in the first case
> > just to better understand the debug info).
>
> I'm afraid it is hard to avoid the .quad or .8byte.
> Here is a 64-bit address version that assembles fine by both x86_64 and
> aarch64 as.
> Unfortunately doesn't fail with broken gas versions with -gdwarf-2 without
> the nop, so we'll need at least a nop in there.
> Fortunately gcc/configure.ac already determines the right nop insn for the
> target, in $insn.
> So I guess what we want next is have the 32-bit version of this with .4byte
> instead of .8byte and just let's try to assemble both versions, first
> without -gdwarf-2 and the one that succeeds assemble again with -gdwarf-2
> and check for the duplicate .debug_line sections error.
Ok, here it is in patch form.
I've briefly tested it, with the older binutils I have around (no --gdwarf-N
support), with latest gas (--gdwarf-N that can be passed to as even when
compiling C/C++ etc. code and emitting .debug_line) and latest gas with Mark's fix
reverted (--gdwarf-N support, but can only pass it to as when assembling
user .s/.S files, not when compiling C/C++ etc.).
2020-10-07 Jakub Jelinek <jakub@redhat.com>
* configure.ac (HAVE_AS_GDWARF_5_DEBUG_FLAG,
HAVE_AS_WORKING_DWARF_4_FLAG): New tests.
* gcc.c (ASM_DEBUG_DWARF_OPTION): Define.
(ASM_DEBUG_SPEC): Use ASM_DEBUG_DWARF_OPTION instead of
"--gdwarf2". Use %{cond:opt1;:opt2} style.
(ASM_DEBUG_OPTION_DWARF_OPT): Define.
(ASM_DEBUG_OPTION_SPEC): Define.
(asm_debug_option): New variable.
(asm_options): Add "%(asm_debug_option)".
(static_specs): Add asm_debug_option entry.
(static_spec_functions): Add dwarf-version-gt.
(debug_level_greater_than_spec_func): New function.
* config/darwin.h (ASM_DEBUG_OPTION_SPEC): Define.
* config/darwin9.h (ASM_DEBUG_OPTION_SPEC): Redefine.
* config.in: Regenerated.
* configure: Regenerated.
> > I was really hoping bbs 4 and 5 would be one loop (the one I set safelen
> > and force_vectorize etc. for) and that basic blocks 6 and 7 would be
> > together with that inner loop another loop, but apparently loop discovery
> > thinks it is just one loop.
> > Any ideas what I'm doing wrong or is there any way how to make it two loops
> > (that would also survive all the cfg cleanups until vectorization)?
>
> The early CFG looks like we have a common header with two latches
> so it boils down to how we disambiguate those in the end (we seem
> to unify the latches via a forwarder). IIRC OMP lowering builds
> loops itself, could it not do the appropriate disambiguation itself?
I realized I emit the same stmts on both paths (before goto doit; and before
falling through it), at least the MIN_EXPR and PLUS_EXPR, so by forcing
there an extra bb which does those two and having the "doit" label before
that the innermost loop doesn't have multiple latches anymore and so is
vectorized fine.
2020-10-07 Jakub Jelinek <jakub@redhat.com>
* omp-expand.c (expand_omp_simd): Don't emit MIN_EXPR and PLUS_EXPR
at the end of entry_bb and innermost init_bb, instead force arguments
for MIN_EXPR into temporaries in both cases and jump to a new bb that
performs MIN_EXPR and PLUS_EXPR.
* gcc.dg/gomp/simd-2.c: New test.
* gcc.dg/gomp/simd-3.c: New test.
If we change gimple_can_duplicate_bb_p to return false instead of true, we run
into a segfault in ch_base::copy_headers due to using dump_file while it's
NULL:
...
if (!gimple_duplicate_sese_region (entry, exit, bbs, n_bbs, copied_bbs,
true))
{
fprintf (dump_file, "Duplication failed.\n");
continue;
}
...
Fix this by adding the missing dump_file != NULL test.
Tested by rebuilding lto1 and rerunning the failing test-case.
gcc/ChangeLog:
2020-10-07 Tom de Vries <tdevries@suse.de>
* tree-ssa-loop-ch.c (ch_base::copy_headers): Add missing NULL test
for dump_file.
I was notified that our P0634R3 (Down with typename) implementation has
a flaw: when we have an out-of-class member function definition, we
still required 'typename' for its parameters. For example here:
template <typename T> struct S {
int simple(T::type);
};
template <typename T>
int S<T>::simple(/* typename */T::type) { return 0; }
the 'typename' isn't necessary per [temp.res]/5.2.4. We have a qualified
name here ("S<T>::simple") so we know it's already been declared so we
can look it up to see if it's a function template or a variable
template.
In this case, the P0634R3 code in cp_parser_direct_declarator wasn't
looking into uninstantiated templates and didn't find the member
function 'simple' -- cp_parser_lookup_name returned a SCOPE_REF which
means that the qualifying scope was dependent. With this fix, we find
the BASELINK for 'simple', don't clear CP_PARSER_FLAGS_TYPENAME_OPTIONAL
from the flags, and the typename is implicitly assumed.
gcc/cp/ChangeLog:
PR c++/97297
* parser.c (cp_parser_direct_declarator): When checking if a
name is a function template declaration for the P0634R3 case,
look in uninstantiated templates too.
gcc/testsuite/ChangeLog:
PR c++/97297
* g++.dg/cpp2a/typename18.C: New test.
For some implementations of Stream, advancing the stream will invalidate
the previously-returned peek buffer. Copy the peek buffer before
advancing in Import::read to avoid this undefined behavior.
Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/259438
Provide a hybrid EVRP pass which uses legacy EVRP and adds additonal
enhancements from the new ranger infrastructure.
A New option is also provided, -fevrp-mode=
And adjust testcases
gcc/ChangeLog:
2020-10-06 Andrew MacLeod <amacleod@redhat.com>
* flag-types.h (enum evrp_mode): New enumerated type EVRP_MODE_*.
* common.opt (fevrp-mode): New undocumented flag.
* gimple-ssa-evrp.c: Include gimple-range.h
(class rvrp_folder): EVRP folding using ranger exclusively.
(rvrp_folder::rvrp_folder): New.
(rvrp_folder::~rvrp_folder): New.
(rvrp_folder::value_of_expr): New. Use rangers value_of_expr.
(rvrp_folder::value_on_edge): New. Use rangers value_on_edge.
(rvrp_folder::value_of_Stmt): New. Use rangers value_of_stmt.
(rvrp_folder::fold_stmt): New. Call the simplifier.
(class hybrid_folder): EVRP folding using both engines.
(hybrid_folder::hybrid_folder): New.
(hybrid_folder::~hybrid_folder): New.
(hybrid_folder::fold_stmt): New. Simplify with one engne, then the
other.
(hybrid_folder::value_of_expr): New. Use both value routines.
(hybrid_folder::value_on_edge): New. Use both value routines.
(hybrid_folder::value_of_stmt): New. Use both value routines.
(hybrid_folder::choose_value): New. Choose between range_analzyer and
rangers values.
(execute_early_vrp): Choose a folder based on flag_evrp_mode.
* vr-values.c (simplify_using_ranges::fold_cond): Try range_of_stmt
first to see if it returns a value.
(simplify_using_ranges::simplify_switch_using_ranges): Return true if
any changes were made to the switch.
gcc/testsuite/ChangeLog:
2020-10-06 Andrew MacLeod <amacleod@redhat.com>
* gcc.dg/pr81192.c: Disable EVRP pass.
* gcc.dg/tree-ssa/pr77445-2.c: Ditto.
* gcc.dg/tree-ssa/ssa-dom-thread-6.c: Adjust.
* gcc.dg/tree-ssa/ssa-dom-thread-7.c: Ditto.
Add the 8 ranger files and the Makefile changes to build it.
2020-10-06 Andrew MacLeod <amacleod@redhat.com>
* Makefile.in (OBJS): Add gimple-range*.o.
* gimple-range.h: New file.
* gimple-range.cc: New file.
* gimple-range-cache.h: New file.
* gimple-range-cache.cc: New file.
* gimple-range-edge.h: New file.
* gimple-range-edge.cc: New file.
* gimple-range-gori.h: New file.
* gimple-range-gori.cc: New file.
This inlines most members of std::exception_ptr so that all operations
on a null exception_ptr can be optimized away. This benefits code like
std::future and coroutines where an exception_ptr object is present to
cope with exceptional cases, but is usually not used and remains null.
Since those functions were previously non-inline we have to continue to
export them from the library, for objects that were compiled against the
old headers and expect to find definitions in the library.
In order to inline the copy constructor and destructor we need to export
the _M_addref() and _M_release() members that increment/decrement the
reference count when copying/destroying a non-null exception_ptr. The
copy ctor and dtor check for null and don't call _M_addref and
_M_release unless they need to. The checks for null pointers in
_M_addref and _M_release are still needed because old code might call
them without checking for null first. But we can use __builtin_expect to
predict that they are usually called for the non-null case.
libstdc++-v3/ChangeLog:
PR libstdc++/90295
* config/abi/pre/gnu.ver (CXXABI_1.3.13): New symbol version.
(exception_ptr::_M_addref(), exception_ptr::_M_release()):
Export symbols.
* libsupc++/eh_ptr.cc (exception_ptr::exception_ptr()):
Remove out-of-line definition.
(exception_ptr::exception_ptr(const exception_ptr&)):
Likewise.
(exception_ptr::~exception_ptr()): Likewise.
(exception_ptr::operator=(const exception_ptr&)):
Likewise.
(exception_ptr::swap(exception_ptr&)): Likewise.
(exception_ptr::_M_addref()): Add branch prediction.
* libsupc++/exception_ptr.h (exception_ptr::operator bool):
Add noexcept.
[!_GLIBCXX_EH_PTR_COMPAT] (operator==, operator!=): Define
inline as hidden friends. Remove declarations at namespace
scope.
(exception_ptr::exception_ptr()): Define inline.
(exception_ptr::exception_ptr(const exception_ptr&)):
Likewise.
(exception_ptr::~exception_ptr()): Likewise.
(exception_ptr::operator=(const exception_ptr&)):
Likewise.
(exception_ptr::swap(exception_ptr&)): Likewise.
* testsuite/util/testsuite_abi.cc: Add CXXABI_1.3.13.
* testsuite/18_support/exception_ptr/90295.cc: New test.
This patch enables SIMD modes for MVE auto-vectorization.
In this patch, the integer and float MVE SIMD modes are returned by
arm_preferred_simd_mode (TARGET_VECTORIZE_PREFERRED_SIMD_MODE hook) when
MVE or MVE_FLOAT is enabled. Then the expanders for auto-vectorization
can be used for generating MVE SIMD code.
This patch also fixes bugs in MVE vreiterpretq_*.c tests which are
revealed by the enabled MVE SIMD modes.
The tests are for checking the MVE reinterpret intrinsics.
There are two functions in each of the tests. The two functions contain
the pattern of identical code so that they are folded in icf pass.
Because of icf, the instruction count only checks one function which is
8. However when the SIMD modes are enabled, the estimation of the code
size becomes smaller so that inlining is applied after icf, then the
instruction count becomes 16 which causes failure of the tests.
Because the icf is not the expected pattern to be tested but causes
above issues, -fno-ipa-icf is applied to the tests to avoid unstable
instruction count.
gcc/ChangeLog:
2020-10-05 Dennis Zhang <dennis.zhang@arm.com>
* config/arm/arm.c (arm_preferred_simd_mode): Enable MVE SIMD modes.
gcc/testsuite/ChangeLog:
2020-10-05 Dennis Zhang <dennis.zhang@arm.com>
* gcc.target/arm/mve/intrinsics/vreinterpretq_f16.c: Use additional
option -fno-ipa-icf and change the instruction count from 8 to 16.
* gcc.target/arm/mve/intrinsics/vreinterpretq_f32.c: Likewise.
* gcc.target/arm/mve/intrinsics/vreinterpretq_s16.c: Likewise.
* gcc.target/arm/mve/intrinsics/vreinterpretq_s32.c: Likewise.
* gcc.target/arm/mve/intrinsics/vreinterpretq_s64.c: Likewise.
* gcc.target/arm/mve/intrinsics/vreinterpretq_s8.c: Likewise.
* gcc.target/arm/mve/intrinsics/vreinterpretq_u16.c: Likewise.
* gcc.target/arm/mve/intrinsics/vreinterpretq_u32.c: Likewise.
* gcc.target/arm/mve/intrinsics/vreinterpretq_u64.c: Likewise.
* gcc.target/arm/mve/intrinsics/vreinterpretq_u8.c: Likewise.
Consider test-case test.c, with VLA A:
...
int main (void) {
int N = 1000;
int A[N];
#pragma acc declare copy(A)
return 0;
}
...
compiled using:
...
$ gcc test.c -fopenacc -S -fdump-tree-all
...
At original, we have:
...
#pragma acc declare map(tofrom:A);
...
but at gimple, we have a map (to:A.1), but not a map (from:A.1):
...
int[0:D.2074] * A.1;
{
int A[0:D.2074] [value-expr: *A.1];
saved_stack.2 = __builtin_stack_save ();
try
{
A.1 = __builtin_alloca_with_align (D.2078, 32);
#pragma omp target oacc_declare map(to:(*A.1) [len: D.2076])
}
finally
{
__builtin_stack_restore (saved_stack.2);
}
}
...
This is caused by the following incompatibility. When storing the desired
from clause in oacc_declare_returns, we use 'A.1' as the key:
...
10898 oacc_declare_returns->put (decl, c);
(gdb) call debug_generic_expr (decl)
A.1
(gdb) call debug_generic_expr (c)
map(from:(*A.1))
...
but when looking it up, we use 'A' as the key:
...
(gdb)
1471 tree *c = oacc_declare_returns->get (t);
(gdb) call debug_generic_expr (t)
A
...
Fix this by extracing the 'A.1' lookup key from 'A' using the decl-expr.
In addition, unshare the looked up value, to fix avoid running into
an "incorrect sharing of tree nodes" error.
Using these two fixes, we get our desired:
...
finally
{
+ #pragma omp target oacc_declare map(from:(*A.1))
__builtin_stack_restore (saved_stack.2);
}
...
Build on x86_64-linux with nvptx accelerator, tested libgomp.
gcc/ChangeLog:
2020-10-06 Tom de Vries <tdevries@suse.de>
PR middle-end/90861
* gimplify.c (gimplify_bind_expr): Handle lookup in
oacc_declare_returns using key with decl-expr.
libgomp/ChangeLog:
2020-10-06 Tom de Vries <tdevries@suse.de>
PR middle-end/90861
* testsuite/libgomp.oacc-c-c++-common/declare-vla.c: Remove xfail.
readelf -S prints:
There are 81999 section headers, starting at offset 0x1f488060:
Section Headers:
[Nr] Name Type Address Off Size ES Flg Lk Inf Al
[ 0] NULL 0000000000000000 000000 01404f 00 81998 0 0
[ 1] .group GROUP 0000000000000000 000040 000008 04 81995 105027 4
...
[81995] .symtab SYMTAB 0000000000000000 d5d9298 2db310 18 81997 105026 8
[81996] .symtab_shndx SYMTAB SECTION INDICES 0000000000000000 d8b45a8 079dd8 04 81995 0 4
[81997] .strtab STRTAB 0000000000000000 d92e380 80460c 00 0 0 1
...
Looking at the documentation:
Table 7–15 ELF sh_link and sh_info Interpretation
sh_type - sh_link
SHT_SYMTAB - The section header index of the associated string table.
SHT_SYMTAB_SHNDX - The section header index of the associated symbol table.
As seen, sh_link of a SHT_SYMTAB always points to a .strtab and readelf
confirms that.
So we need to use reverse mapping taken from
[81996] .symtab_shndx SYMTAB SECTION INDICES 0000000000000000 d8b45a8 079dd8 04 81995 0 4
where sh_link points to 81995.
libiberty/ChangeLog:
PR lto/97290
* simple-object-elf.c (simple_object_elf_copy_lto_debug_sections):
Use sh_link of a .symtab_shndx section.
gcc/ChangeLog:
* common.opt: Remove -fdbg-cnt-list from deferred options.
* dbgcnt.c (dbg_cnt_set_limit_by_index): Make a copy
to original_limits.
(dbg_cnt_list_all_counters): Print also current counter value
and print to stderr.
* opts-global.c (handle_common_deferred_options): Do not handle
-fdbg-cnt-list.
* opts.c (common_handle_option): Likewise.
* toplev.c (finalize): Handle it after compilation here.
The fix "[omp, ftracer] Don't duplicate blocks in SIMT region" adds iteration
over insns in ignore_bb_p, which makes it more expensive.
Counteract this by piggybacking the computation of can_duplicate_bb_p onto
count_insns, which is called at the start of ftracer.
Bootstrapped and reg-tested on x86_64-linux.
gcc/ChangeLog:
2020-10-05 Tom de Vries <tdevries@suse.de>
* tracer.c (count_insns): Rename to ...
(analyze_bb): ... this.
(cache_can_duplicate_bb_p, cached_can_duplicate_bb_p): New function.
(ignore_bb_p): Use cached_can_duplicate_bb_p.
(tail_duplicate): Call cache_can_duplicate_bb_p.
Factor out can_duplicate_bb_p out of ignore_bb_p.
Also factor out can_duplicate_insn_p and can_duplicate_bb_no_insn_iter_p to
expose the parts of can_duplicate_bb_p that are per-bb and per-insn.
Bootstrapped and reg-tested on x86_64-linux.
gcc/ChangeLog:
2020-10-05 Tom de Vries <tdevries@suse.de>
* tracer.c (can_duplicate_insn_p, can_duplicate_bb_no_insn_iter_p)
(can_duplicate_bb_p): New function, factored out of ...
(ignore_bb_p): ... here.
In commit ef275d1f20 I implemented the
wrong resolution of LWG 3474. This removes the deduction guide and
alters the views::join factory to create the right type explicitly.
libstdc++-v3/ChangeLog:
* include/std/ranges (join_view): Remove deduction guide.
(views::join): Add explicit template argument list to prevent
deducing the wrong type.
* testsuite/std/ranges/adaptors/join.cc: Move test for LWG 3474
here, from ...
* testsuite/std/ranges/adaptors/join_lwg3474.cc: Removed.
As written in the comment, tree-ssa-math-opts.c wouldn't create a DIVMOD
ifn call for division + modulo by constant for the fear that during
expansion we could generate better code for those cases.
If the divisoris a power of two, that is certainly the case always,
but otherwise expand_divmod can punt in many cases, e.g. if the division
type's precision is above HOST_BITS_PER_WIDE_INT, we don't even call
choose_multiplier, because it works on HOST_WIDE_INTs (true, something
we should fix eventually now that we have wide_ints), or if pre/post shift
is larger than BITS_PER_WORD.
So, the following patch recognizes DIVMOD with constant last argument even
when it is unclear if expand_divmod will be able to optimize it, and then
during DIVMOD expansion if the divisor is constant attempts to expand it as
division + modulo and if they actually don't contain any libcalls or
division/modulo, they are kept as is, otherwise that sequence is thrown away
and divmod optab or libcall is used.
2020-10-06 Jakub Jelinek <jakub@redhat.com>
PR rtl-optimization/97282
* tree-ssa-math-opts.c (divmod_candidate_p): Don't return false for
constant op2 if it is not a power of two and the type has precision
larger than HOST_BITS_PER_WIDE_INT or BITS_PER_WORD.
* internal-fn.c (contains_call_div_mod): New function.
(expand_DIVMOD): If last argument is a constant, try to expand it as
TRUNC_DIV_EXPR followed by TRUNC_MOD_EXPR, but if the sequence
contains any calls or {,U}{DIV,MOD} rtxes, throw it away and use
divmod optab or divmod libfunc.
* gcc.target/i386/pr97282.c: New test.
This ICEs because node->alias_target is (not yet) a FUNCTION_DECL, but
IDENTIFIER_NODE.
I guess we should retry the discovery before LTO streaming out, the reason
to do it this early is that it can affect the gimplification and omp lowering.
2020-10-06 Jakub Jelinek <jakub@redhat.com>
PR middle-end/97289
* omp-offload.c (omp_discover_declare_target_tgt_fn_r): Only follow
node->alias_target if it is a FUNCTION_DECL.
* c-c++-common/gomp/pr97289.c: New test.
This patch rearranges feature bits for MVE and FP to implement the
following flags for -mcpu=cortex-m55.
- +nomve: equivalent to armv8.1-m.main+fp.dp+dsp.
- +nomve.fp: equivalent to armv8.1-m.main+mve+fp.dp (+dsp is implied by +mve).
- +nofp: equivalent to armv8.1-m.main+mve (+dsp is implied by +mve).
- +nodsp: equivalent to armv8.1-m.main+fp.dp.
Combinations of the above:
- +nomve+nofp: equivalent to armv8.1-m.main+dsp.
- +nodsp+nofp: equivalent to armv8.1-m.main.
Due to MVE and FP sharing vfp_base, some new syntax was required in the CPU
description to implement the concept of 'implied bits'. These are non-named
features added to the ISA late, depending on whether one or more features which
depend on them are present. This means vfp_base can be present when only one of
MVE and FP is removed, but absent when both are removed.
gcc/ChangeLog:
2020-07-31 Joe Ramsay <joe.ramsay@arm.com>
* config/arm/arm-cpus.in:
(ALL_FPU_INTERNAL): Remove vfp_base.
(VFPv2): Remove vfp_base.
(MVE): Remove vfp_base.
(vfp_base): Redefine as implied bit dependent on MVE or FP
(cortex-m55): Add flags to disable MVE, MVE FP, FP and DSP extensions.
* config/arm/arm.c (arm_configure_build_target): Add implied bits to ISA.
* config/arm/parsecpu.awk:
(gen_isa): Print implied bits and their dependencies to ISA header.
(gen_data): Add parsing for implied feature bits.
gcc/testsuite/ChangeLog:
* gcc.target/arm/cortex-m55-nodsp-flag-hard.c: New test.
* gcc.target/arm/cortex-m55-nodsp-flag-softfp.c: New test.
* gcc.target/arm/cortex-m55-nodsp-nofp-flag-softfp.c: New test.
* gcc.target/arm/cortex-m55-nofp-flag-hard.c: New test.
* gcc.target/arm/cortex-m55-nofp-flag-softfp.c: New test.
* gcc.target/arm/cortex-m55-nofp-nomve-flag-softfp.c: New test.
* gcc.target/arm/cortex-m55-nomve-flag-hard.c: New test.
* gcc.target/arm/cortex-m55-nomve-flag-softfp.c: New test.
* gcc.target/arm/cortex-m55-nomve.fp-flag-hard.c: New test.
* gcc.target/arm/cortex-m55-nomve.fp-flag-softfp.c: New test.
* gcc.target/arm/multilib.exp: Add tests for -mcpu=cortex-m55.
The implementation of Stream_from_file mishandled several cases:
* It reversed the check for whether bytes were already available in
the peek buffer.
* It considered positive return values from lseek to be an error, when
only a -1 return value indicates an error.
Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/259437
This avoids unnecessary instantiations of std::numeric_limits or
inclusion of <limits> when a more lightweight alternative would work.
Some uses can be replaced with __gnu_cxx::__int_traits and some can just
use size_t(-1) directly where SIZE_MAX is needed.
libstdc++-v3/ChangeLog:
* include/bits/regex.h: Use __int_traits<int> instead of
std::numeric_limits<int>.
* include/bits/uniform_int_dist.h: Use __int_traits<T>::__max
instead of std::numeric_limits<T>::max().
* include/bits/hashtable_policy.h: Use size_t(-1) instead of
std::numeric_limits<size_t>::max().
* include/std/regex: Include <ext/numeric_traits.h>.
* include/std/string_view: Use typedef for __int_traits<int>.
* src/c++11/hashtable_c++0x.cc: Use size_t(-1) instead of
std::numeric_limits<size_t>::max().
* testsuite/std/ranges/iota/96042.cc: Include <limits>.
* testsuite/std/ranges/iota/difference_type.cc: Likewise.
* testsuite/std/ranges/subrange/96042.cc: Likewise.
When adding new features to <numeric> I included the required headers
adjacent to the new code. This cleans it up by moving all the includes
to the start of the file.
libstdc++-v3/ChangeLog:
* include/std/numeric: Move all #include directives to the top
of the header.
* testsuite/26_numerics/gcd/gcd_neg.cc: Adjust dg-error line
numbers.
* testsuite/26_numerics/lcm/lcm_neg.cc: Likewise.
These are cleanups so that multi-range union/intersect doesn't
have to deal with legacy code. Instead, these should be done in
legacy mode.
gcc/ChangeLog:
* value-range.cc (irange::legacy_intersect): Only handle
legacy ranges.
(irange::legacy_union): Same.
(irange::union_): When unioning legacy with non-legacy,
first convert to legacy and do everything in legacy mode.
(irange::intersect): Same, but for intersect.
* range-op.cc (range_tests): Adjust for above changes.
This patch imports three fixes from the ranger branch:
1. Fold division by zero into varying instead of undefined.
This provides compatibility with existing stuff on trunk.
2. Solver changes for lshift.
This should not affect anything on trunk, as it only involves
the GORI solver which is yet to be contributed.
3. Preserve existing behavior for ABS([-MIN,-MIN]).
This is actually unrepresentable, but trunk has traditionally
treated this as [-MIN,-MIN] so this patch just syncs range-ops
with the rest of trunk.
gcc/ChangeLog:
* range-op.cc (operator_div::wi_fold): Return varying for
division by zero.
(class operator_rshift): Move class up.
(operator_abs::wi_fold): Return [-MIN,-MIN] for ABS([-MIN,-MIN]).
(operator_tests): Adjust tests.
> See my comment above for Martins attempts to improve things. I don't
> really want to try decide what to do with those late diagnostic IL
> printing but my commit was blamed for showing target-mem-ref unsupported.
>
> I don't have much time to spend to think what to best print and what not,
> but yes, printing only the MEM_REF part is certainly imprecise.
Here is an updated version of the patch that prints TARGET_MEM_REF the way
it should be printed - as C representation of what it actually means.
Of course it would be better to have the original expressions, but with the
late diagnostics we no longer have them.
2020-10-05 Richard Biener <rguenther@suse.de>
Jakub Jelinek <jakub@redhat.com>
PR c++/97197
gcc/cp/
* error.c (dump_expr): Handle TARGET_MEM_REF.
gcc/c-family/
* c-pretty-print.c: Include langhooks.h.
(c_pretty_printer::postfix_expression): Handle TARGET_MEM_REF as
expression.
(c_pretty_printer::expression): Handle TARGET_MEM_REF as
unary_expression.
(c_pretty_printer::unary_expression): Handle TARGET_MEM_REF.
std::allocator and std::pmr::polymorphic_allocator should throw
std::bad_array_new_length from their allocate member functions if the
number of bytes required cannot be represented in std::size_t.
libstdc++-v3/ChangeLog:
* config/abi/pre/gnu.ver: Add new symbol.
* include/bits/functexcept.h (__throw_bad_array_new_length):
Declare new function.
* include/ext/malloc_allocator.h (malloc_allocator::allocate):
Throw bad_array_new_length for impossible sizes (LWG 3190).
* include/ext/new_allocator.h (new_allocator::allocate):
Likewise.
* include/std/memory_resource (polymorphic_allocator::allocate)
(polymorphic_allocator::allocate_object): Use new function,
__throw_bad_array_new_length.
* src/c++11/functexcept.cc (__throw_bad_array_new_length):
Define.
* testsuite/20_util/allocator/lwg3190.cc: New test.
