gcc.git
4 years agolibstdc++: Fix constraints on std::compare_three_way
Jonathan Wakely [Tue, 14 Apr 2020 20:58:03 +0000 (21:58 +0100)]
libstdc++: Fix constraints on std::compare_three_way

My "simplification" of std::compare_three_way's constraints in commit
f214ffb336d582a66149068a2a96b7fcf395b5de was incorrect, because
std::three_way_comparable_with imposes additional restrictions beyond
the <=> expression being valid.

* libsupc++/compare (compare_three_way): Fix constraint so that
BUILTIN-PTR-THREE-WAY does not require three_way_comparable_with.
* testsuite/18_support/comparisons/object/builtin-ptr-three-way.cc:
New test.

4 years agolibstdc++: Add comparison operators to std::shared_ptr (PR 94562)
Jonathan Wakely [Tue, 14 Apr 2020 20:54:55 +0000 (21:54 +0100)]
libstdc++: Add comparison operators to std::shared_ptr (PR 94562)

This also implements the proposed resolution to LWG issue 3247, so that
the ill-formed <=> expression with nullptr is not used.

PR libstdc++/94562
* include/bits/shared_ptr.h (operator<=>): Define for C++20.
* include/bits/shared_ptr_base.h (operator<=>): Likewise.
* include/bits/unique_ptr.h (operator<=>): Add inline specifier.
* testsuite/20_util/shared_ptr/comparison/cmp_c++20.cc: New test.
* testsuite/20_util/shared_ptr/comparison/less.cc: Do not expect
std::less<A*> to be used when comparing std::shared_ptr<A> objects in
C++20.

4 years agocoroutines: Fix compile error with symmetric transfers [PR94359]
Iain Sandoe [Tue, 14 Apr 2020 19:37:12 +0000 (20:37 +0100)]
coroutines: Fix compile error with symmetric transfers [PR94359]

For symmetric transfers to work with C++20 coroutines, it is
currently necessary to tail call the callee coroutine from resume
method of the caller coroutine. The current codegen marks these
resume calls as "MUST_TAIL_CALL" to indicate that the tail call is
required for correctness.

Unfortunately, several targets have ABI constraints that prevent
an indirect tail-call, which results in the PRs compile error.

The change here tests the target sibcall hook for the resume
expression and only marks it as requiring a tail call if that's
supported.

This doesn't fix the underlying problem; that really a solution is
needed to allow the tail-calls (or equivalent) to take place - but
that will be deferred until next stage 1.

gcc/cp/ChangeLog:

2020-04-14  Iain Sandoe  <iain@sandoe.co.uk>

PR c++/94359
* coroutines.cc (build_actor_fn): Check that the target can
support the resume tailcall before mandating it.

gcc/testsuite/ChangeLog:

2020-04-14  Iain Sandoe  <iain@sandoe.co.uk>

PR c++/94359
* g++.dg/coroutines/torture/symmetric-transfer-00-basic.C:
Expect a run fail for targets without arbitrary indirect
tail-calls.

4 years agolibstdc++: Fix order of entries in ChangeLog
Jonathan Wakely [Tue, 14 Apr 2020 19:42:48 +0000 (20:42 +0100)]
libstdc++: Fix order of entries in ChangeLog

4 years agoFix for PR/94542, do not make TLS refs PC-relative
Aaron Sawdey [Tue, 14 Apr 2020 19:38:47 +0000 (14:38 -0500)]
Fix for PR/94542, do not make TLS refs PC-relative

For rs6000 target, it is not valid to make PC-relative
references to TLS symbols. So addr_to_insn_form() needs
to check if things are TLS before returning PC-rel forms.

2020-04-14  Aaron Sawdey  <acsawdey@linux.ibm.com>

PR target/94542
* config/rs6000/rs6000.c (address_to_insn_form): Do not attempt to
use PC-relative addressing for TLS references.

4 years agoc++: Add testcase for PR c++/93207
Patrick Palka [Tue, 14 Apr 2020 19:02:22 +0000 (15:02 -0400)]
c++: Add testcase for PR c++/93207

gcc/testsuite/ChangeLog:

PR c++/93207
* g++.dg/concepts/variadic5.C: New test.

4 years agoc++: "'decltype_type' not supported" in diagnostic [PR85278]
Patrick Palka [Tue, 14 Apr 2020 18:22:31 +0000 (14:22 -0400)]
c++: "'decltype_type' not supported" in diagnostic [PR85278]

This fixes a garbled concepts diagnostic by moving the handling of DECLTYPE_TYPE
from pp_cxx_type_specifier_seq to cxx_pretty_printer::simple_type_specifier, a
move which also seems to be more consistent with the language grammar.

This patch also fixes pretty printing of rvalue reference types via
cxx_pretty_printer::type_id, which eventually calls pp_c_pointer which currently
doesn't distinguish between lvalue and rvalue references.

gcc/c-family/ChangeLog:

PR c++/85278
* c-pretty-print.c (pp_c_pointer) <case REFERENCE_TYPE>: Print a double
ampersand if it's an rvalue reference type.

gcc/cp/ChangeLog:

PR c++/85278
* cxx-pretty-print.c (cxx_pretty_printer:simple_type_specifier)
<case DECLTYPE_TYPE>: Handle DECLTYPE_TYPE here instead of ...
(pp_cxx_type_specifier_seq) <case DECLTYPE_TYPE>: ... here.
(cxx_pretty_printer::direct_abstract_declarator) <case DECLTYPE_TYPE>:
New no-op case.

gcc/testsuite/ChangeLog:

PR c++/85278
* g++.dg/concepts/diagnostic9.C: New test.

4 years agoipa-sra: Fix treatment of internal functions (PR 94434)
Martin Jambor [Tue, 14 Apr 2020 17:26:04 +0000 (19:26 +0200)]
ipa-sra: Fix treatment of internal functions (PR 94434)

IPA-SRA can segfault when processing a call to an internal function
because such calls do not have corresponding call graphs and should be
treated like memory accesses anyway, which what the patch below does.

The patch makes an attempt to differentiate between reads and writes,
although for things passed by value it does not make any difference.
It treats all arguments of functions denoted with internal_store_fn_p
as written to, even though in practice only some are, but for IPA-SRA
purposes, actions needed to be taken when processing a read are also
always performed when analyzing a write, so the code is just slightly
pessimistic.  But not as pessimistic as bailing out on any internal
call immediately.

I have LTO bootstrapped and tested the patch on x86_64-linux and
normally bootstrapped and tested it on aarch64-linux, although one
which is not SVE capable.  I would appreciate testing on such machine
too - as well as a small testcase that would follow all relevant
conventions in gcc.target/aarch64/sve.

2020-04-14  Martin Jambor  <mjambor@suse.cz>

PR ipa/94434
* ipa-sra.c: Include internal-fn.h.
(enum isra_scan_context): Update comment.
(scan_function): Treat calls to internal_functions like loads or stores.

4 years agoc++: Stray RESULT_DECLs in result of constexpr call [PR94034]
Patrick Palka [Wed, 8 Apr 2020 17:14:42 +0000 (13:14 -0400)]
c++: Stray RESULT_DECLs in result of constexpr call [PR94034]

When evaluating the initializer of 'a' in the following example

  struct A {
    A() = default; A(const A&);
    A *p = this;
  };
  constexpr A foo() { return {}; }
  constexpr A a = foo();

the PLACEHOLDER_EXPR for 'this' in the aggregate initializer returned by foo
gets resolved to the RESULT_DECL of foo.  But due to guaranteed RVO, the 'this'
should really be resolved to '&a'.

Fixing this properly by immediately resolving 'this' and PLACEHOLDER_EXPRs to
the ultimate object under construction would in general mean that we would no
longer be able to cache constexpr calls for which RVO possibly applies, because
the result of the call may now depend on the ultimate object under construction.

So as a mostly correct stopgap solution that retains cachability of RVO'd
constexpr calls, this patch fixes this issue by rewriting all occurrences of the
RESULT_DECL in the result of a constexpr function call with the current object
under construction, after the call returns.  This means the 'this' pointer
during construction of the temporary will still point to the temporary object
instead of the ultimate object, but besides that this approach seems
functionally equivalent to the proper approach.

gcc/cp/ChangeLog:

PR c++/94034
* constexpr.c (replace_result_decl_data): New struct.
(replace_result_decl_data_r): New function.
(replace_result_decl): New function.
(cxx_eval_call_expression): Use it.
* tree.c (build_aggr_init_expr): Set the location of the AGGR_INIT_EXPR
to that of its initializer.

gcc/testsuite/ChangeLog:

PR c++/94034
* g++.dg/cpp0x/constexpr-empty15.C: New test.
* g++.dg/cpp1y/constexpr-nsdmi6a.C: New test.
* g++.dg/cpp1y/constexpr-nsdmi6b.C: New test.
* g++.dg/cpp1y/constexpr-nsdmi7a.C: New test.
* g++.dg/cpp1y/constexpr-nsdmi7b.C: New test.

4 years agotestsuite: Add testcase for already fixed PR [PR94573]
Jakub Jelinek [Tue, 14 Apr 2020 14:14:47 +0000 (16:14 +0200)]
testsuite: Add testcase for already fixed PR [PR94573]

2020-04-14  Jakub Jelinek  <jakub@redhat.com>

PR tree-optimization/94573
* gcc.dg/store_merging_30.c: New test.

4 years agoPR tree-optimization/94574 - aarch64: ICE during GIMPLE pass:ccp
Yang Yang [Tue, 14 Apr 2020 19:42:23 +0000 (19:42 +0000)]
PR tree-optimization/94574 - aarch64: ICE during GIMPLE pass:ccp

In this PR the testcase ICEs because a BIT_INSERT_EXPR whose replaced bits are
not fully inside the container is generated. A size check is added to avoid
this kind of ICE.

gcc/ChangeLog:

PR tree-optimization/94574
* tree-ssa.c (non_rewritable_lvalue_p): Add size check when analyzing
whether a vector-insert is rewritable using a BIT_INSERT_EXPR.

gcc/testsuite/ChangeLog:

PR tree-optimization/94574
* gcc.dg/pr94574.c: New test.

4 years agoi386: Remove mode size check in ix86_get_ssemov
H.J. Lu [Tue, 14 Apr 2020 13:00:21 +0000 (06:00 -0700)]
i386: Remove mode size check in ix86_get_ssemov

Even though ix86_hard_regno_mode_ok doesn't allow xmm16-xmm31 nor
ymm16-ymm31 in 128/256 bit modes when AVX512VL is disabled, LRA can
still generate reg to reg moves with xmm16-xmm31 and ymm16-ymm31 in
128/256 bit modes.  Remove mode size check in ix86_get_ssemov.

gcc/

PR target/94561
* config/i386/i386.c (ix86_get_ssemov): Remove mode size check.

gcc/testsuite/

PR target/94561
* gcc.target/i386/pr94561.c: New test.

4 years agoAdd myself as callgraph (IPA) reviewer
Martin Jambor [Tue, 14 Apr 2020 12:12:18 +0000 (14:12 +0200)]
Add myself as callgraph (IPA) reviewer

2020-04-14  Martin Jambor  <mjambor@suse.cz>

* MAINTAINERS (Reviewers): Add myself as callgraph (IPA) reviewer.

4 years ago[Fortran] Fix name conflict check for use-assoc (PR 92736)
Tobias Burnus [Tue, 14 Apr 2020 11:57:52 +0000 (13:57 +0200)]
[Fortran] Fix name conflict check for use-assoc (PR 92736)

* module.c (gfc_match_use): Fix name-conflict check for use-associating
the same symbol again in a submodule.

* gfortran.dg/use_rename_10.f90: New.
* gfortran.dg/use_rename_11.f90: New.

4 years agoFix PR 94270 by not warning about artifical dummy arguments.
Thomas König [Tue, 14 Apr 2020 11:50:51 +0000 (13:50 +0200)]
Fix PR 94270 by not warning about artifical dummy arguments.

2020-04-14  Thomas Koenig  <tkoenig@gcc.gnu.org>

PR fortran/94270
* interface.c (gfc_get_formal_from_actual_arglist): Always
set artificial attribute for symbols.
* trans-decl.c (generate_local_decl): Do not warn if the
symbol is artifical.

2020-04-14  Thomas Koenig  <tkoenig@gcc.gnu.org>

PR fortran/94270
* gfortran.dg/warn_unused_dummy_argument_6.f90: New test.

4 years agoAdd me as callgraph (IPA) reviewer.
Martin Liska [Tue, 14 Apr 2020 11:19:21 +0000 (13:19 +0200)]
Add me as callgraph (IPA) reviewer.

ChangeLog:

2020-04-14  Martin Liska  <mliska@suse.cz>

* MAINTAINERS: Add me as callgraph (IPA) reviewer.

4 years agolibstdc++: Make comparison category comparisons noexcept (PR 94565)
Jonathan Wakely [Tue, 14 Apr 2020 10:23:34 +0000 (11:23 +0100)]
libstdc++: Make comparison category comparisons noexcept (PR 94565)

PR libstdc++/94565
* libsupc++/compare (__unspec): Add noexcept-specifier to constructor.
* testsuite/18_support/comparisons/categories/94565.cc: New test.

4 years agoc++: Improve redeclared parameter name diagnostic [PR94588]
Marek Polacek [Mon, 13 Apr 2020 23:06:39 +0000 (19:06 -0400)]
c++: Improve redeclared parameter name diagnostic [PR94588]

While reviewing [basic.scope.param] I noticed we don't show the location
of the previous declaration when giving an error about "A parameter name
shall not be redeclared in the outermost block of the function definition".

PR c++/94588
* name-lookup.c (check_local_shadow): Add an inform call.

* g++.dg/diagnostic/redeclaration-1.C: Add dg-message.

4 years agoDaily bump.
GCC Administrator [Tue, 14 Apr 2020 00:16:25 +0000 (00:16 +0000)]
Daily bump.

4 years agoUpdate and correct documentation of -Wall and -Wrestrict.
Martin Sebor [Mon, 13 Apr 2020 22:31:09 +0000 (16:31 -0600)]
Update and correct documentation of -Wall and -Wrestrict.

gcc/ChangeLog:
* doc/extend.texi (-Wall): Mention -Wformat-overflow and
-Wformat-truncation.  Move -Wzero-length-bounds last.
(-Wrestrict): Document positive form of option enabled by -Wall.

4 years agoPR c/92326 - wrong bound in zero-length array diagnostics
Martin Sebor [Mon, 13 Apr 2020 21:31:44 +0000 (15:31 -0600)]
PR c/92326 - wrong bound in zero-length array diagnostics

gcc/c-family/ChangeLog:

PR c/92326
* c-pretty-print.c (c_pretty_printer::direct_abstract_declarator): Avoid
printing array bound for flexible array members.

gcc/testsuite/ChangeLog:

PR c/92326
* c-c++-common/Warray-bounds-8.c: New test.
* gcc.dg/Warray-bounds-46.c: Adjust expected format of flexible array
memebrs in diagnostics.
* gcc.dg/Warray-bounds-49.c: Same.

4 years agoc++: Infinite diagnostic loop with decltype([]{}) [PR94521]
Patrick Palka [Mon, 13 Apr 2020 20:53:41 +0000 (16:53 -0400)]
c++: Infinite diagnostic loop with decltype([]{}) [PR94521]

We are hitting a recursive loop when printing the signature of a function
containing a decltype([]{}) type.  The loop is

  dump_function_decl -> dump_substitution
     -> dump_template_bindings
     -> dump_type
     -> dump_aggr_type
     -> dump_scope -> dump_function_decl

and we loop because dump_template_bindings wants to print the resolved type of
decltype([]{}) (i.e. just a lambda type), so it calls dump_aggr_type, which
wants to print the function scope of the lambda type.  But the function scope of
the lambda type is the function which we're in the middle of printing.

This patch breaks the loop by passing TFF_NO_FUNCTION_ARGUMENTS to
dump_function_decl from dump_scope, so that we avoid recursing into
dump_substitution and ultimately looping.

This also means we no longer emit the "[with ...]" clause when printing a
function template scope, and we instead just emit its template argument list in
a more natural way, e.g. instead of
    foo(int, char) [with T=bool]::x
we would now print
    foo<bool>::x
which seems like an improvement on its own.

The full signature of the function 'spam' in the below testcase is now
  void spam(decltype (<lambda>)*) [with T = int; decltype (<lambda>) = spam<int>::<lambda()>]

gcc/cp/ChangeLog:

PR c++/94521
* error.c (dump_scope): Pass TFF_NO_FUNCTION_ARGUMENTS to
dump_function_decl when printing a function template instantiation as a
scope.

gcc/testsuite/ChangeLog:

PR c++/94521
* g++.dg/cpp2a/lambda-uneval12.C: New test.

4 years agoc++: More self-modifying constexpr init [PR94470]
Patrick Palka [Mon, 13 Apr 2020 20:53:02 +0000 (16:53 -0400)]
c++: More self-modifying constexpr init [PR94470]

In this PR we're incorrectly rejecting a self-modifying constexpr initializer as
a consequence of the fix for PR78572.

It looks like however that the fix for PR78572 is obsoleted by the fix for
PR89336: the testcase from the former PR successfully compiles even with its fix
reverted.

But then further testing showed that the analogous testcase of PR78572 where the
array has an aggregate element type is still problematic (i.e. we ICE) even with
the fix for PR78572 applied.  The reason is that in cxx_eval_bare_aggregate we
attach a constructor_elt of aggregate type always to the end of the new
CONSTRUCTOR, but that's not necessarily correct if the CONSTRUCTOR is
self-modifying.  We should instead be using get_or_insert_ctor_field to insert
the constructor_elt in the right place.

So this patch reverts the PR78572 fix and makes the appropriate changes to
cxx_eval_bare_aggregate.  This fixes PR94470, and we now are also able to fully
reduce the initializers of 'arr' and 'arr2' in the new test array57.C to
constant initializers.

gcc/cp/ChangeLog:

PR c++/94470
* constexpr.c (get_or_insert_ctor_field): Set default value of parameter
'pos_hint' to -1.
(cxx_eval_bare_aggregate): Use get_or_insert_ctor_field instead of
assuming the the next index belongs at the end of the new CONSTRUCTOR.
(cxx_eval_store_expression): Revert PR c++/78572 fix.

gcc/testsuite/ChangeLog:

PR c++/94470
* g++.dg/cpp1y/constexpr-nsdmi8.C: New test.
* g++.dg/cpp1y/constexpr-nsdmi9.C: New test.
* g++.dg/init/array57.C: New test.

4 years agocoroutines: Rename the coroutines cpp builtin.
Iain Sandoe [Mon, 13 Apr 2020 19:48:46 +0000 (20:48 +0100)]
coroutines: Rename the coroutines cpp builtin.

The current standard draft (n4861) amends the cpp builtin for
coroutines to '__cpp_impl_coroutine', no other change.

gcc/c-family/ChangeLog:

2020-04-13  Iain Sandoe  <iain@sandoe.co.uk>

* c-cppbuiltin.c (c_cpp_builtins): Update coroutines builtin
define, per n4861.

gcc/testsuite/ChangeLog:

2020-04-13  Iain Sandoe  <iain@sandoe.co.uk>

* g++.dg/coroutines/coro-pre-proc.C: Update coroutines builtin
define, per n4861.
* g++.dg/coroutines/coro.h: Likewise.

libstdc++-v3/ChangeLog:

2020-04-13  Iain Sandoe  <iain@sandoe.co.uk>

* include/std/coroutine: Update coroutines builtin define,
per n4861.

4 years agoMinor documentation fix
Zackery Spytz [Mon, 13 Apr 2020 19:29:13 +0000 (13:29 -0600)]
Minor documentation fix

* doc/extend.texi: Add realloc to list of built-in functions
are recognized by the compiler.

4 years agoDarwin, testsuite: Fix darwin-version-1.c fails with XCode 11.4.
Iain Sandoe [Mon, 13 Apr 2020 18:27:21 +0000 (19:27 +0100)]
Darwin, testsuite: Fix darwin-version-1.c fails with XCode 11.4.

From XCode 11.4 on 10.14/15 use of 10.6 and 10.7 is deprecated.
The tools issue diagnostics if -mmacosx-version-min= < 10.8

Adjust the testcase to avoid that usage on 10.14, 10.15 for now.

gcc/testsuite/ChangeLog:

2020-04-13  Iain Sandoe  <iain@sandoe.co.uk>

* gcc.dg/darwin-version-1.c: Use -mmacosx-version-min= 10.8
for system versions 10.14 and 10.15.

4 years agoCommit test case for PR 87644, which has fixed itself somehow.
Thomas König [Mon, 13 Apr 2020 17:06:41 +0000 (19:06 +0200)]
Commit test case for PR 87644, which has fixed itself somehow.

2020-04-13  Thomas Koenig  <tkoenig@gcc.gnu.org>

PR fortran/87644
* gfortran.dg/variable_parameter.f90: New test.

4 years agoICE on wrong code [PR94192].
Linus Koenig [Mon, 13 Apr 2020 14:30:44 +0000 (16:30 +0200)]
ICE on wrong code [PR94192].

The idea is not have another resolution of a pointer if an error has
occurred previously.

2020-04-13  Linus Koenig <link@sig-st.de>

PR fortran/94192
* resolve.c (resolve_fl_var_and_proc): Set flag "error" to 1 if
pointer is found to not have an assumed rank or a deferred shape.
* simplify.c (simplify_bound): If an error has been issued for a
given pointer, one should not attempt to find its bounds.

2020-04-13  Linus Koenig <link@sig-st.de>

PR fortran/94192
* gfortran.dg/bound_resolve_after_error_1.f90: New test.

4 years agoc++: lambdas with internal linkage are different to no-linkage [PR94426]
Nathan Sidwell [Mon, 13 Apr 2020 13:35:33 +0000 (06:35 -0700)]
c++: lambdas with internal linkage are different to no-linkage [PR94426]

My fix for 94147 was confusing no-linkage with internal linkage, at
the language level.  That's wrong. (the std is confusing here, because
it describes linkage of names (which is wrong), and lambdas have no
names)

Lambdas with extra-scope, have linkage.  However, at the
implementation-level that linkage is at least as restricted as the
linkage of the extra-scope decl.

Further, when instantiating a variable initialized by a lambda, we
must determine the visibility of the variable itself, before
instantiating its initializer.  If the template arguments are internal
(or no-linkage), the variable will have internal linkage, regardless
of the linkage of the template it is instantiated from.  We need to
know that before instantiating the lambda, so we can restrict its
linkage correctly.

* decl2.c (determine_visibility): A lambda's visibility is
affected by its extra scope.
* pt.c (instantiate_decl): Determine var's visibility before
instantiating its initializer.
* tree.c (no_linkage_check): Revert code looking at visibility of
lambda's extra scope.
` gcc/cp/
* g++.dg/cpp0x/lambda/pr94426-[12].C: New.
* g++.dg/abi/lambda-vis.C: Drop a warning.
* g++.dg/cpp0x/lambda/lambda-mangle.C: Lambda visibility on
variable changes.
* g++.dg/opt/dump1.C: Drop warnings of no import.

4 years agox86: Restore the frame pointer in word_mode
H.J. Lu [Mon, 13 Apr 2020 11:23:05 +0000 (04:23 -0700)]
x86: Restore the frame pointer in word_mode

We must restore the frame pointer in word_mode for eh_return epilogues
since the upper 32 bits of RBP register can have any values.

Tested on Linux/x32 and Linux/x86-64.

PR target/94556
* config/i386/i386.c (ix86_expand_epilogue): Restore the frame
pointer in word_mode for eh_return epilogues.

4 years agoMSP430: Dont add offsets to addresses when emitting asm for post_inc
Jozef Lawrynowicz [Fri, 10 Apr 2020 16:31:33 +0000 (17:31 +0100)]
MSP430: Dont add offsets to addresses when emitting asm for post_inc

Some insns, which operate on SImode operands, output assembler template
that comprise of multiple instructions using HImode operands. To access
the high word of an SImode operand, an operand selector '%H' is used to
offset the operand value by a constant amount.

When one of these HImode operands is a memory reference to a post_inc,
the address does not need to be offset, since the preceding instruction
has already offset the address to the correct value.

This fixes an ICE in change_address_1, at emit-rtl.c:2318 for
gcc.c-torture/execute/pr20527-1.c in the "-mlarge -O2 -flto
-fuse-linker-plugin -fno-fat-lto-objects" configuration.

This test generated the following insn, and the attempt to output the
high part of the post_inc address caused the ICE.
(set (reg:SI 6 R6)
     (minus:SI (reg:SI 6 R6)
               (mem:SI (post_inc:PSI (reg:PSI 10 R10)) {subsi3}

gcc/ChangeLog:

2020-04-13  Jozef Lawrynowicz  <jozef.l@mittosystems.com>

* config/msp430/msp430.c (msp430_print_operand): Don't add offsets to
memory references in %B, %C and %D operand selectors when the inner
operand is a post increment address.

4 years agoMSP430: Fix memory offsets used by %C and %D asm output operand modifiers
Jozef Lawrynowicz [Mon, 13 Apr 2020 09:28:01 +0000 (10:28 +0100)]
MSP430: Fix memory offsets used by %C and %D asm output operand modifiers

The %C and %D operand modifiers are supposed to access the 3rd and 4th
words of a 64-bit value, so for memory references they need to offset
the given address by 4 and 6 bytes respectively.

gcc/ChangeLog:

2020-04-13  Jozef Lawrynowicz  <jozef.l@mittosystems.com>

* config/msp430/msp430.c (msp430_print_operand): Offset a %C memory
reference by 4 bytes, and %D memory reference by 6 bytes.

gcc/testsuite/ChangeLog:

2020-04-13  Jozef Lawrynowicz  <jozef.l@mittosystems.com>

* gcc.target/msp430/operand-modifiers.c: New test.

4 years agod: Merge update dmd 799066f49
Iain Buclaw [Mon, 13 Apr 2020 09:25:26 +0000 (11:25 +0200)]
d: Merge update dmd 799066f49

Removes the implementation of __traits(argTypes), which only supported
x86_64 targets.  The only use of this trait is an unused va_arg()
function, this has been removed as well.

Reviewed-on: https://github.com/dlang/dmd/pull/11022

gcc/d/ChangeLog:

2020-04-13  Iain Buclaw  <ibuclaw@gdcproject.org>

* Make-lang.in (D_FRONTEND_OBJS): Remove d/argtypes.o.
* d-target.cc (Target::toArgTypes): New function.

libphobos/ChangeLog:

2020-04-13  Iain Buclaw  <ibuclaw@gdcproject.org>

* libdruntime/core/stdc/stdarg.d: Remove run-time va_list template.

4 years agoRename 'libgomp.oacc-c-c++-common/static-dynamic-lifetimes-*' to 'libgomp.oacc-c...
Thomas Schwinge [Mon, 13 Apr 2020 06:56:03 +0000 (08:56 +0200)]
Rename 'libgomp.oacc-c-c++-common/static-dynamic-lifetimes-*' to 'libgomp.oacc-c-c++-common/structured-dynamic-lifetimes-*' [PR92843]

Fix-up for commit be9862dd96945772ae0692bc95b37ec6dbcabda0 "Test cases for
mixed structured/dynamic data lifetimes with OpenACC [PR92843]": it's
"structured", not "static" data lifetimes/reference counters.

libgomp/
PR libgomp/92843
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-1-lib.c:
Rename to...
* testsuite/libgomp.oacc-c-c++-common/structured-dynamic-lifetimes-1-lib.c:
... this.
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-1.c:
Rename to...
* testsuite/libgomp.oacc-c-c++-common/structured-dynamic-lifetimes-1.c:
... this.
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-2-lib.c:
Rename to...
* testsuite/libgomp.oacc-c-c++-common/structured-dynamic-lifetimes-2-lib.c:
... this.
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-2.c:
Rename to...
* testsuite/libgomp.oacc-c-c++-common/structured-dynamic-lifetimes-2.c:
... this.
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-3-lib.c:
Rename to...
* testsuite/libgomp.oacc-c-c++-common/structured-dynamic-lifetimes-3-lib.c:
... this.
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-3.c:
Rename to...
* testsuite/libgomp.oacc-c-c++-common/structured-dynamic-lifetimes-3.c:
... this.
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-4-lib.c:
Rename to...
* testsuite/libgomp.oacc-c-c++-common/structured-dynamic-lifetimes-4-lib.c:
... this.
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-4.c:
Rename to...
* testsuite/libgomp.oacc-c-c++-common/structured-dynamic-lifetimes-4.c:
... this.
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-5-lib.c:
Rename to...
* testsuite/libgomp.oacc-c-c++-common/structured-dynamic-lifetimes-5-lib.c:
... this.
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-5.c:
Rename to...
* testsuite/libgomp.oacc-c-c++-common/structured-dynamic-lifetimes-5.c:
... this.
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-6-lib.c:
Rename to...
* testsuite/libgomp.oacc-c-c++-common/structured-dynamic-lifetimes-6-lib.c:
... this.
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-6.c:
Rename to...
* testsuite/libgomp.oacc-c-c++-common/structured-dynamic-lifetimes-6.c:
... this.
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-7-lib.c:
Rename to...
* testsuite/libgomp.oacc-c-c++-common/structured-dynamic-lifetimes-7-lib.c:
... this.
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-7.c:
Rename to...
* testsuite/libgomp.oacc-c-c++-common/structured-dynamic-lifetimes-7.c:
... this.
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-8-lib.c:
Rename to...
* testsuite/libgomp.oacc-c-c++-common/structured-dynamic-lifetimes-8-lib.c:
... this.
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-8.c::
Rename to...
* testsuite/libgomp.oacc-c-c++-common/structured-dynamic-lifetimes-8.c:
... this.

4 years agoDaily bump.
GCC Administrator [Mon, 13 Apr 2020 00:16:18 +0000 (00:16 +0000)]
Daily bump.

4 years agoAdded a test case from a PR that was fixed by something else.
Thomas König [Sun, 12 Apr 2020 15:02:08 +0000 (17:02 +0200)]
Added a test case from a PR that was fixed by something else.

2020-04-12  Thomas Koenig  <tkoenig@gcc.gnu.org>

PR fortran/94091
* gfortran.dg/char_length_22.f90: New test.

Committed ChangeLog entry.

4 years agoDarwin, testsuite: Adjust indirect thunk tests for default flags.
Iain Sandoe [Sun, 12 Apr 2020 12:15:38 +0000 (13:15 +0100)]
Darwin, testsuite: Adjust indirect thunk tests for default flags.

Darwin mandates an indirection for variables in the commmon
section.  Since the change to -fno-common, variables in some
of the thunk tests are now in the .data section where they
may be accessed directly.  Remove the indirections from the
scan-assembler matches.

gcc/testsuite/ChangeLog:

2020-04-12  Iain Sandoe  <iain@sandoe.co.uk>

* gcc.target/i386/indirect-thunk-1.c: Adjust for fno-common
change, removing indirections for vars in .data.
* gcc.target/i386/indirect-thunk-2.c: Likewise.
* gcc.target/i386/indirect-thunk-3.c: Likewise.
* gcc.target/i386/indirect-thunk-4.c: Likewise.
* gcc.target/i386/indirect-thunk-attr-1.c: Likewise.
* gcc.target/i386/indirect-thunk-attr-2.c: Likewise.
* gcc.target/i386/indirect-thunk-attr-3.c: Likewise.
* gcc.target/i386/indirect-thunk-attr-4.c: Likewise.
* gcc.target/i386/indirect-thunk-attr-5.c: Likewise.
* gcc.target/i386/indirect-thunk-attr-6.c: Likewise.
* gcc.target/i386/indirect-thunk-extern-1.c: Likewise.
* gcc.target/i386/indirect-thunk-extern-2.c: Likewise.
* gcc.target/i386/indirect-thunk-extern-3.c: Likewise.
* gcc.target/i386/indirect-thunk-extern-4.c: Likewise.
* gcc.target/i386/indirect-thunk-inline-1.c: Likewise.
* gcc.target/i386/indirect-thunk-inline-2.c: Likewise.
* gcc.target/i386/indirect-thunk-inline-3.c: Likewise.
* gcc.target/i386/indirect-thunk-inline-4.c: Likewise.

4 years agoDaily bump.
GCC Administrator [Sun, 12 Apr 2020 00:16:16 +0000 (00:16 +0000)]
Daily bump.

4 years agoc++: Add test for PR 86327.
Marek Polacek [Sat, 11 Apr 2020 14:45:33 +0000 (10:45 -0400)]
c++: Add test for PR 86327.

Fixed by r264171.

PR c++/86327
* g++.dg/cpp1y/constexpr-return5.C: New test.

4 years agoi386: Fix REDUC_SSE_SMINMAX_MODE mode conditions.
Uros Bizjak [Sat, 11 Apr 2020 09:51:41 +0000 (11:51 +0200)]
i386: Fix REDUC_SSE_SMINMAX_MODE mode conditions.

V4SI, V8HI and V16QI modes of redux_<code>_scal_<mode> expander
expand with SSE2 instructions (PSRLDQ and PCMPGTx) so use
TARGET_SSE2 as relevant mode iterator codition.

PR target/94494
* config/i386/sse.md (REDUC_SSE_SMINMAX_MODE): Use TARGET_SSE2
condition for V4SI, V8HI and V16QI modes.

testsuite/ChangeLog:

PR target/94494
* gcc.target/i386/pr94494.c: New test.

4 years agotestsuite: Fix up pr94482.c testcase [PR94482]
Jakub Jelinek [Sat, 11 Apr 2020 05:50:50 +0000 (07:50 +0200)]
testsuite: Fix up pr94482.c testcase [PR94482]

The test FAILs on powerpc64-linux with -m32 due to psabi warnings.
Furthermore, the test needs really -msse2 to reproduce on x86 -m32 at -O2.

2020-04-11  Jakub Jelinek  <jakub@redhat.com>

PR tree-optimization/94482
* gcc.dg/torture/pr94482.c: Add -Wno-psabi -w.  Don't add -msse
and sse_runtime effective target on x86, instead only add -msse2
if target is sse2_runtime.

4 years agocselib: Mark the cselib_record_sp_cfa_base_equiv VALUE as preserved [PR94551]
Jakub Jelinek [Sat, 11 Apr 2020 05:32:12 +0000 (07:32 +0200)]
cselib: Mark the cselib_record_sp_cfa_base_equiv VALUE as preserved [PR94551]

Sometimes the cselib_record_sp_cfa_base_equiv makes it into the var-tracking
used VALUEs and needs to be preserved.

2020-04-11  Jakub Jelinek  <jakub@redhat.com>

PR debug/94495
PR target/94551
* cselib.c (cselib_record_sp_cfa_base_equiv): Set PRESERVED_VALUE_P on
val->val_rtx.

4 years agoDaily bump.
GCC Administrator [Sat, 11 Apr 2020 00:16:15 +0000 (00:16 +0000)]
Daily bump.

4 years agoCorrect PR numbers in the last Changelog.
Iain Sandoe [Fri, 10 Apr 2020 23:46:52 +0000 (00:46 +0100)]
Correct PR numbers in the last Changelog.

I mistyped the PR number in the actual fix commit
r10-7682-g0666767eb4cc864f00ba34d97b9d58f8dc650bba.

4 years agocoroutines: Revise await expansions [PR94528]
Iain Sandoe [Fri, 10 Apr 2020 19:55:10 +0000 (20:55 +0100)]
coroutines: Revise await expansions [PR94528]

The expansions for await expressions were specific to particular
cases, this revises it to be more generic.

a: Revise co_await statement walkers.

We want to process the co_awaits one statement at a time.
We also want to be able to determine the insertion points for
new bind scopes needed to cater for temporaries that are
captured by reference and have lifetimes that need extension
to the end of the full expression.  Likewise, the handling of
captured references in the evaluation of conditions might
result in the need to make a frame copy.

This reorganises the statement walking code to make it easier to
extend for these purposes.

b: Factor reference-captured temp code.

We want to be able to use the code that writes a new bind expr
with vars (and their initializers) from several places, so split
that out of the maybe_promote_captured_temps() function into a
new replace_statement_captures ().  Update some comments.

c: Generalize await statement expansion.

This revises the expansion to avoid the need to expand conditionally
on the tree type.  It resolves PR 94528.

gcc/cp/ChangeLog:

2020-04-10  Iain Sandoe  <iain@sandoe.co.uk>

PR c++/94538
* coroutines.cc (co_await_expander): Remove.
(expand_one_await_expression): New.
(process_one_statement): New.
(await_statement_expander): New.
(build_actor_fn): Revise to use per-statement expander.
(struct susp_frame_data): Reorder and comment.
(register_awaits): Factor code.
(replace_statement_captures): New, factored from...
(maybe_promote_captured_temps):.. here.
(await_statement_walker): Revise to process per statement.
(morph_fn_to_coro): Use revised susp_frame_data layout.

gcc/testsuite/ChangeLog:

2020-04-10  Iain Sandoe  <iain@sandoe.co.uk>

PR c++/94538
* g++.dg/coroutines/pr94528.C: New test.

4 years agoc++: make __is_constructible work with paren-init of aggrs [PR94149]
Marek Polacek [Thu, 9 Apr 2020 20:31:59 +0000 (16:31 -0400)]
c++: make __is_constructible work with paren-init of aggrs [PR94149]

In C++20 this is well-formed:

  using T = int[2];
  T t(1, 2);

which means that std::is_constructible_v<int[2], int, int> should be true.
But constructible_expr immediately returned the error_mark_node when it
saw a list with more than one element.  To give accurate results in
C++20, we have to try initializing the aggregate from a parenthesized list of
values.

To not repeat the same mistake as in c++/93790, if there's only one
element, I'm trying {} only when () didn't succeed.  is_constructible5.C
verifies this.

In paren-init24.C std::is_nothrow_constructible_v doesn't work due to
 error: invalid 'static_cast' from type 'int' to type 'int [1]'
and
 error: functional cast to array type 'int [2]'

This needs to be fixed in libstdc++.

PR c++/94149
* method.c (constructible_expr): In C++20, try using parenthesized
initialization of aggregates to determine the result of
__is_constructible.

* g++.dg/cpp2a/paren-init24.C: New test.
* g++.dg/cpp2a/paren-init25.C: New test.
* g++.dg/ext/is_constructible5.C: New test.

4 years agoFix typo in gfortran.dg/asynchronous_5.f03 from last commit.
Fritz Reese [Fri, 10 Apr 2020 15:28:45 +0000 (11:28 -0400)]
Fix typo in gfortran.dg/asynchronous_5.f03 from last commit.

2020-04-10  Fritz Reese  <foreese@gcc.gnu.org>

* gfortran.dg/asynchronous_5.f03: Fix typo in testcase and add
IMPLICIT NONE.

4 years agoFix UNRESOLVED testcase gfortran.dg/asynchronous_5.f03.
Fritz Reese [Fri, 10 Apr 2020 15:24:28 +0000 (11:24 -0400)]
Fix UNRESOLVED testcase gfortran.dg/asynchronous_5.f03.

gcc/testsuite/ChangeLog:

2020-04-10  Fritz Reese  <foreese@gcc.gnu.org>

* gfortran.dg/asynchronous_5.f03: Add -fdump-tree-original and fix
patterns for scan-tree-dump.

4 years agoTest cases for mixed structured/dynamic data lifetimes with OpenACC [PR92843]
Julian Brown [Fri, 17 Jan 2020 21:18:18 +0000 (13:18 -0800)]
Test cases for mixed structured/dynamic data lifetimes with OpenACC [PR92843]

libgomp/
PR libgomp/92843
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-1-lib.c:
New file.
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-1.c:
Likewise.
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-2-lib.c:
Likewise.
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-2.c:
Likewise.
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-3-lib.c:
Likewise.
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-3.c:
Likewise.
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-4-lib.c:
Likewise.
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-4.c:
Likewise.
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-5-lib.c:
Likewise.
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-5.c:
Likewise.
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-6-lib.c:
Likewise.
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-6.c:
Likewise.
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-7-lib.c:
Likewise.
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-7.c:
Likewise.
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-8-lib.c:
Likewise.
* testsuite/libgomp.oacc-c-c++-common/static-dynamic-lifetimes-8.c:
Likewise.

4 years agoAdd 'dg-do run' to 'libgomp.fortran/target-enter-data-1.f90'
Thomas Schwinge [Wed, 1 Apr 2020 21:26:56 +0000 (23:26 +0200)]
Add 'dg-do run' to 'libgomp.fortran/target-enter-data-1.f90'

Fix-up for commit 689418b97e5eb6a221871a2439bca3e6283ac579 "libgomp – fix
handling of 'target enter data'".

libgomp/
* testsuite/libgomp.fortran/target-enter-data-1.f90: Add 'dg-do
run'.

4 years agoHandle 'omp declare target' attribute set for both OpenACC and OpenMP 'target' [PR894...
Thomas Schwinge [Wed, 4 Mar 2020 16:58:33 +0000 (17:58 +0100)]
Handle 'omp declare target' attribute set for both OpenACC and OpenMP 'target' [PR89433, PR93465]

... which as of PR89433 commit b48f44bf77a39fefc238a16cf1225c6464c82406 causes
an ICE.  Not sure if this is actually supposed to be valid or invalid code.
Until the interactions between OpenACC and OpenMP 'target' get defined
properly, make this a compile-time error.

gcc/
PR middle-end/89433
PR middle-end/93465
* omp-general.c (oacc_verify_routine_clauses): Diagnose if
"#pragma omp declare target" has also been applied.
gcc/testsuite/
PR middle-end/89433
PR middle-end/93465
* c-c++-common/goacc-gomp/pr93465-1.c: New file.

4 years agolibphobos: Use libdruntime as a convenience library for libphobos.
Iain Buclaw [Fri, 10 Apr 2020 07:35:09 +0000 (09:35 +0200)]
libphobos: Use libdruntime as a convenience library for libphobos.

As a prerequesite for PR94304, it becomes easier to manage selectively
compiling sublibraries when there's only one library to link to.

So a druntime convenience library is built to be part of phobos, however
separate druntime library is still built and installed, to allow linking
only to the core runtime explicitly, rather than pulling in the entire
standard library with it.

The gdc driver no longer generates an '-lgdruntime' option, and the
inclusion of the libdruntime library path has been removed from the
testsuite.

gcc/d/ChangeLog:

* d-spec.cc (LIBDRUNTIME): Remove.
(LIBDRUNTIME_PROFILE): Remove.
(lang_specific_driver): Don't link in libgdruntime.

gcc/testsuite/ChangeLog:

* lib/gdc.exp (gdc_link_flags): Remove libdruntime library path.

libphobos/ChangeLog:

* d_rules.am (libdgruntime_la_LINK): Move to libdruntime/Makefile.am.
(libgphobos_la_LINK): Move to src/Makefile.am
* libdruntime/Makefile.am: Add libgdruntime_convenience library.
* libdruntime/Makefile.in: Regenerate.
* src/Makefile.am (libgphobos_la_LIBADD): Add libgdruntime_convenience
library.
(libgphobos_la_DEPENDENCIES): Likewise.
* src/Makefile.in: Regenerate.
* testsuite/lib/libphobos.exp: Remove libdruntime library paths.
* testsuite/testsuite_flags.in: Likewise.

4 years agoSimplify co_await_expander.
Bin Cheng [Fri, 10 Apr 2020 04:38:53 +0000 (12:38 +0800)]
Simplify co_await_expander.

gcc/cp
2020-04-10  Bin Cheng  <bin.cheng@linux.alibaba.com>

    * coroutines.cc (co_await_expander): Simplify.

gcc/testsuite
2020-04-10  Bin Cheng  <bin.cheng@linux.alibaba.com>

    * g++.dg/coroutines/co-await-syntax-10.C: New test.
    * g++.dg/coroutines/co-await-syntax-11.C: New test.

4 years agolibgo: update to final 1.14.2 release
Ian Lance Taylor [Wed, 8 Apr 2020 23:51:01 +0000 (16:51 -0700)]
libgo: update to final 1.14.2 release

Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/227551

4 years agocompiler: look up composite literal keys in the global namespace
Ian Lance Taylor [Fri, 10 Apr 2020 00:42:37 +0000 (17:42 -0700)]
compiler: look up composite literal keys in the global namespace

A composite literal key may not have a global definition, so
Gogo::define_global_names may not see it.  In order to correctly
handle the case in which a predeclared identifier is used as a
composite literal key, do an explicit check of the global namespace.

Test case is https://golang.org/cl/227783.

Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/227784

4 years agoDaily bump.
GCC Administrator [Fri, 10 Apr 2020 00:16:23 +0000 (00:16 +0000)]
Daily bump.

4 years agoPR fortran/87923 -- fix ICE when resolving I/O tags and simplify io.c
Fritz Reese [Thu, 9 Apr 2020 20:55:44 +0000 (16:55 -0400)]
PR fortran/87923 -- fix ICE when resolving I/O tags and simplify io.c

2020-04-06  Fritz Reese  <foreese@gcc.gnu.org>

This patch reorganizes I/O checking code. Checks which were done in the
matching phase which do not affect the match result are moved to the
resolution phase. Checks which were duplicated in both the matching phase
and resolution phase have been reduced to one check in the resolution phase.

Another section of code which used a global async_io_dt flag to check for
and assign the asynchronous attribute to variables used in asynchronous I/O
has been simplified.

Furthermore, this patch improves error reporting and expands test coverage
of I/O tags:

 - "TAG must be an initialization expression" reported by io.c
   (check_io_constraints) is replaced with an error from expr.c
   (gfc_reduce_init_expr) indicating _why_ the expression is not a valid
   initialization expression.

 - Several distinct error messages regarding the check for scalar
   + character + default kind have been unified to one message reported by
   resolve_tag or check_*_constraints.

gcc/fortran/ChangeLog:

2020-04-09  Fritz Reese  <foreese@gcc.gnu.org>

PR fortran/87923
* gfortran.h (gfc_resolve_open, gfc_resolve_close): Add
locus parameter.
(gfc_resolve_dt): Add code parameter.
* io.c (async_io_dt, check_char_variable, is_char_type): Removed.
(resolve_tag_format): Add locus to error message regarding
zero-sized array in FORMAT tag.
(check_open_constraints, check_close_constraints): New functions
called at resolution time.
(gfc_match_open, gfc_match_close, match_io): Move checks which don't
affect the match result to new functions check_open_constraints,
check_close_constraints, check_io_constraints.
(gfc_resolve_open, gfc_resolve_close): Call new functions
check_open_constraints, check_close_constraints after all tags have
been independently resolved.  Remove duplicate constraints which are
already verified by resolve_tag. Explicitly pass locus to all error
reports.
(compare_to_allowed_values): Add locus parameter and provide
explicit locus all error reports.
(match_open_element, match_close_element, match_file_element,
match_dt_element, match_inquire_element): Remove redundant special
cases for ASYNCHRONOUS and IOMSG tags.
(gfc_resolve_dt): Remove redundant special case for format
expression.  Call check_io_constraints, forwarding an I/O list as
the io_code parameter if present.
(check_io_constraints): Change return type to bool. Pass explicit
locus to error reports. Move generic checks after tag-specific
checks, since errors are no longer buffered.  Move simplification of
format string to match_io.  Remove redundant checks which are
verified by resolve_tag.  Remove usage of async_io_dt flag and
explicitly mark symbols used in asynchronous I/O with the
asynchronous attribute.
* resolve.c (resolve_transfer, resolve_fl_namelist): Remove checks
for async_io_dt flag. This is now done in io.c
(check_io_constraints).
(gfc_resolve_code): Pass code locus to gfc_resolve_open,
gfc_resolve_close, gfc_resolve_dt.

gcc/testsuite/ChangeLog:

2020-04-09  Fritz Reese  <foreese@gcc.gnu.org>

PR fortran/87923
* gfortran.dg/f2003_io_8.f03: Fix expected error messages.
* gfortran.dg/io_constraints_8.f90: Likewise.
* gfortran.dg/iomsg_2.f90: Likewise.
* gfortran.dg/pr66725.f90: Likewise.
* gfortran.dg/pr88205.f90: Likewise.
* gfortran.dg/write_check4.f90: Likewise.
* gfortran.dg/asynchronous_5.f03: New test.
* gfortran.dg/io_constraints_15.f90: Likewise.
* gfortran.dg/io_constraints_16.f90: Likewise.
* gfortran.dg/io_constraints_17.f90: Likewise.
* gfortran.dg/io_constraints_18.f90: Likewise.
* gfortran.dg/io_tags_1.f90: Likewise.
* gfortran.dg/io_tags_10.f90: Likewise.
* gfortran.dg/io_tags_2.f90: Likewise.
* gfortran.dg/io_tags_3.f90: Likewise.
* gfortran.dg/io_tags_4.f90: Likewise.
* gfortran.dg/io_tags_5.f90: Likewise.
* gfortran.dg/io_tags_6.f90: Likewise.
* gfortran.dg/io_tags_7.f90: Likewise.
* gfortran.dg/io_tags_8.f90: Likewise.
* gfortran.dg/io_tags_9.f90: Likewise.
* gfortran.dg/write_check5.f90: Likewise.

4 years agoc++: constexpr static data member instantiation [PR94523]
Jason Merrill [Thu, 9 Apr 2020 03:59:30 +0000 (23:59 -0400)]
c++: constexpr static data member instantiation [PR94523]

Here due to my recent change to store_init_value we were expanding the
initializer of aw knowing that we were initializing aw.  When
cxx_eval_call_expression finished the constructor, it wanted to look up the
value of aw to set TREE_READONLY on it, but we haven't set DECL_INITIAL yet,
so decl_constant_value tried to instantiate the initializer again.  And
infinite recursion.  Stopped by optimizing the case of asking for the value
of ctx->object, which is ctx->value.  It also would have worked to look in
the values hash table, so let's move that up before decl_constant_value as
well.

gcc/cp/ChangeLog
2020-04-09  Jason Merrill  <jason@redhat.com>

PR c++/94523
* constexpr.c (cxx_eval_constant_expression) [VAR_DECL]: Look at
ctx->object and ctx->global->values first.

4 years agolibstdc++: Implement LWG 3324 for [cmp.alg] function objects (LWG 3324)
Jonathan Wakely [Thu, 9 Apr 2020 21:24:57 +0000 (22:24 +0100)]
libstdc++: Implement LWG 3324 for [cmp.alg] function objects (LWG 3324)

LWG 3324 changed the [cmp.alg] types to use std::compare_three_way
instead of the <=> operator, but we were still using the old
specification. In order to make the existing tests pass the N::X type
needs to be equality comparable, so that three_way_comparable is
satisfied and compare_three_way can be used.

As part of this change I noticed that the compare_three_way call
operator was unconditionally noexcept, which is incorrect.

* libsupc++/compare (compare_three_way): Fix noexcept-specifier.
(strong_order, weak_order, partial_order): Replace uses of <=> with
compare_three_way function object (LWG 3324).
* testsuite/18_support/comparisons/algorithms/partial_order.cc: Add
equality operator so that X satisfies three_way_comparable.
* testsuite/18_support/comparisons/algorithms/strong_order.cc:
Likewise.
* testsuite/18_support/comparisons/algorithms/weak_order.cc: Likewise.

4 years agolibstdc++: Add comparison operators to std::unique_ptr
Jonathan Wakely [Thu, 9 Apr 2020 20:10:32 +0000 (21:10 +0100)]
libstdc++: Add comparison operators to std::unique_ptr

Some more C++20 changes from P1614R2, "The Mothership has Landed".

This includes the proposed resolution for LWG 3426 to fix the three-way
comparison with nullptr_t.

The existing tests for unique_ptr comparisons don't actually check the
results, only that the expressions compile and are convertible to bool.
This also adds a test for the results of those comparisons for C++11 and
up.

* include/bits/unique_ptr.h (operator<=>): Define for C++20.
* testsuite/20_util/default_delete/48631_neg.cc: Adjust dg-error line.
* testsuite/20_util/default_delete/void_neg.cc: Likewise.
* testsuite/20_util/unique_ptr/comparison/compare.cc: New test.
* testsuite/20_util/unique_ptr/comparison/compare_c++20.cc: New test.

4 years agoMSP430: Indiciate that the epilogue_helper insn does not fallthru
Jozef Lawrynowicz [Thu, 9 Apr 2020 19:52:20 +0000 (20:52 +0100)]
MSP430: Indiciate that the epilogue_helper insn does not fallthru

This fixes an ICE in rtl_verify_fallthru, at cfgrtl.c:2970
gcc.c-torture/execute/20071210-1.c for -mcpu=msp430 at -O2
and above.

The epilogue_helper insn was treated as a regular insn which will
fallthru, so when a barrier is emitted after it, RTL verification failed
as rtl_verify_fallthru.

gcc/ChangeLog:

2020-04-09  Jozef Lawrynowicz  <jozef.l@mittosystems.com>

* config/msp430/msp430.c (msp430_expand_epilogue): Use emit_jump_insn
when to emit the epilogue_helper insn.
* config/msp430/msp430.md (epilogue_helper): Add a return insn to the
RTL pattern.

4 years agocselib, var-tracking: Improve debug info after the cselib sp tracking changes [PR94495]
Jakub Jelinek [Thu, 9 Apr 2020 19:21:24 +0000 (21:21 +0200)]
cselib, var-tracking: Improve debug info after the cselib sp tracking changes [PR94495]

On the https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94495#c5
testcase GCC emits worse debug info after the PR92264 cselib.c
changes.
The difference at -O2 -g -dA in the assembly is (when ignoring debug info):
        # DEBUG g => [argp]
        # DEBUG k => [argp+0x20]
        # DEBUG j => [argp+0x18]
        # DEBUG a => di
        # DEBUG b => si
        # DEBUG c => dx
        # DEBUG d => cx
        # DEBUG h => [argp+0x8]
        # DEBUG e => r8
        # DEBUG i => [argp+0x10]
        # DEBUG f => r9
...
 .LVL4:
+       # DEBUG h => [sp+0x10]
+       # DEBUG i => [sp+0x18]
+       # DEBUG j => [sp+0x20]
+       # DEBUG k => [sp+0x28]
        # DEBUG c => entry_value
 # SUCC: EXIT [always]  count:1073741824 (estimated locally)
        ret
 .LVL5:
+       # DEBUG k => [argp+0x20]
        # DEBUG a => bx
        # DEBUG b => si
        # DEBUG c => dx
        # DEBUG d => cx
        # DEBUG e => r8
        # DEBUG f => r9
+       # DEBUG h => [argp+0x8]
+       # DEBUG i => [argp+0x10]
+       # DEBUG j => [argp+0x18]
This means that before the changes, h, i, j, k could be all expressed
in DW_AT_location directly with DW_OP_fbreg <some_offset>, but now we need
to use a location list, where in the first part of the function and last
part of the function (everything except the ret instruction) we use that
DW_OP_fbreg <some_offset>, but for the single ret instruction we instead
say those values live in something pointed by stack pointer + offset.
It is true, but only because stack pointer + offset is equal to DW_OP_fbreg
<some_offset> at that point.

The var-tracking pass has for !frame_pointer_needed functions code to
canonicalize stack pointer uses in the insns before it hands it over
to cselib to cfa_base_rtx + offset depending on the stack depth at each
point.  The problem is that on the last epilogue pop insn (the one right
before ret) the canonicalization is sp = argp - 8 and add_stores records
a MO_VAL_SET operation for that argp - 8 value (which is the
SP_DERIVED_VALUE_P VALUE the cselib changes canonicalize sp based accesses
on) and thus var-tracking from that point onwards tracks that that VALUE
(2:2) now lives in sp.  At the end of function it of course needs to forget
it again (or it would need on any changes to sp).  But when processing
that uop, we note that the VALUE has changed and anything based on it
changed too, so emit changes for everything.  Before that var-tracking
itself doesn't track it in any register, so uses cselib and cselib knows
through the permanent equivs how to compute it using argp (i.e. what
will be DW_OP_fbreg).

The following fix has two parts.  One is it detects if cselib can compute
a certain VALUE using the cfa_base_rtx and for such VALUEs doesn't add
the MO_VAL_SET operation, as it is better to express them using cfa_base_rtx
rather than temporarily through something else.  And the other is make sure
we reuse in !frame_pointer_needed the single SP_DERIVED_VALUE_P VALUE in
other extended basic blocks too (and other VALUEs) too.  This can be done
because we have computed the stack depths at the start of each basic block
in vt_stack_adjustments and while cselib_reset_table is called at the end
of each extended bb, which throws away all hard registers (but the magic
cfa_base_rtx) and so can hint cselib.c at the start of the ebb what VALUE
the sp hard reg has.  That means fewer VALUEs during var-tracking and more
importantly that they will all have the cfa_base_rtx + offset equivalency.

I have performed 4 bootstraps+regtests (x86_64-linux and i686-linux,
each with this patch (that is the new cselib + var-tracking variant) and
once with that patch reverted as well as all other cselib.c changes from
this month; once that bootstrapped, I've reapplied the cselib.c changes and
this patch and rebuilt cc1plus, so that the content is comparable, but built
with the pre-Apr 2 cselib.c+var-tracking.c (that is the old cselib one)).

Below are readelf -WS cc1plus | grep debug_ filtered to only have debug
sections whose size actually changed, followed by dwlocstat results on
cc1plus.  This shows that there was about 3% shrink in those .debug*
sections for 32-bit and 1% shrink for 64-bit, with minor variable coverage
changes one or the other way that are IMHO insignificant.

32-bit old cselib
  [33] .debug_info       PROGBITS        00000000 29139c0 710e5fa 00      0   0  1
  [34] .debug_abbrev     PROGBITS        00000000 9a21fba 21ad6d 00      0   0  1
  [35] .debug_line       PROGBITS        00000000 9c3cd27 1a05e56 00      0   0  1
  [36] .debug_str        PROGBITS        00000000 b642b7d 7cad09 01  MS  0   0  1
  [37] .debug_loc        PROGBITS        00000000 be0d886 5792627 00      0   0  1
  [38] .debug_ranges     PROGBITS        00000000 1159fead e57218 00      0   0  1
sum 263075589B
32-bit new cselib + var-tracking
  [33] .debug_info       PROGBITS        00000000 29129c0 71065d1 00      0   0  1
  [34] .debug_abbrev     PROGBITS        00000000 9a18f91 21af28 00      0   0  1
  [35] .debug_line       PROGBITS        00000000 9c33eb9 195dffc 00      0   0  1
  [36] .debug_str        PROGBITS        00000000 b591eb5 7cace0 01  MS  0   0  1
  [37] .debug_loc        PROGBITS        00000000 bd5cb95 50185bf 00      0   0  1
  [38] .debug_ranges     PROGBITS        00000000 10d75154 e57068 00      0   0  1
sum 254515196B (8560393B smaller)
64-bit old cselib
  [33] .debug_info       PROGBITS        0000000000000000 25e64b0 84d7cc9 00      0   0  1
  [34] .debug_abbrev     PROGBITS        0000000000000000 aabe179 225e2d 00      0   0  1
  [35] .debug_line       PROGBITS        0000000000000000 ace3fa6 19a3505 00      0   0  1
  [37] .debug_loc        PROGBITS        0000000000000000 ce6e960 89707bc 00      0   0  1
  [38] .debug_ranges     PROGBITS        0000000000000000 157df11c 1c59a70 00      0   0  1
sum 342274599B
64-bit new cselib + var-tracking
  [33] .debug_info       PROGBITS        0000000000000000 25e64b0 84d8e86 00      0   0  1
  [34] .debug_abbrev     PROGBITS        0000000000000000 aabf336 225e8d 00      0   0  1
  [35] .debug_line       PROGBITS        0000000000000000 ace51c3 199ded5 00      0   0  1
  [37] .debug_loc        PROGBITS        0000000000000000 ce6a54d 85f62da 00      0   0  1
  [38] .debug_ranges     PROGBITS        0000000000000000 15460827 1c59a20 00      0   0  1
sum 338610402B (3664197B smaller)
32-bit old cselib
cov% samples cumul
0..10 1231599/48% 1231599/48%
11..20 31017/1% 1262616/49%
21..30 36495/1% 1299111/51%
31..40 35846/1% 1334957/52%
41..50 47179/1% 1382136/54%
51..60 41203/1% 1423339/56%
61..70 65504/2% 1488843/58%
71..80 59656/2% 1548499/61%
81..90 104399/4% 1652898/65%
91..100 882231/34% 2535129/100%
32-bit new cselib + var-tracking
cov% samples cumul
0..10 1230542/48% 1230542/48%
11..20 30385/1% 1260927/49%
21..30 36393/1% 1297320/51%
31..40 36053/1% 1333373/52%
41..50 47670/1% 1381043/54%
51..60 41599/1% 1422642/56%
61..70 65902/2% 1488544/58%
71..80 59911/2% 1548455/61%
81..90 104607/4% 1653062/65%
91..100 882067/34% 2535129/100%
64-bit old cselib
cov% samples cumul
0..10 1233211/48% 1233211/48%
11..20 31120/1% 1264331/49%
21..30 39230/1% 1303561/51%
31..40 38887/1% 1342448/52%
41..50 47519/1% 1389967/54%
51..60 45264/1% 1435231/56%
61..70 69431/2% 1504662/59%
71..80 62114/2% 1566776/61%
81..90 104587/4% 1671363/65%
91..100 876085/34% 2547448/100%
64-bit new cselib + var-tracking
cov% samples cumul
0..10 1233471/48% 1233471/48%
11..20 31093/1% 1264564/49%
21..30 39217/1% 1303781/51%
31..40 38851/1% 1342632/52%
41..50 47488/1% 1390120/54%
51..60 45224/1% 1435344/56%
61..70 69409/2% 1504753/59%
71..80 62140/2% 1566893/61%
81..90 104616/4% 1671509/65%
91..100 875939/34% 2547448/100%

2020-04-09  Jakub Jelinek  <jakub@redhat.com>

PR debug/94495
* cselib.h (cselib_record_sp_cfa_base_equiv,
cselib_sp_derived_value_p): Declare.
* cselib.c (cselib_record_sp_cfa_base_equiv,
cselib_sp_derived_value_p): New functions.
* var-tracking.c (add_stores): Don't record MO_VAL_SET for
cselib_sp_derived_value_p values.
(vt_initialize): Call cselib_record_sp_cfa_base_equiv at the
start of extended basic blocks other than the first one
for !frame_pointer_needed functions.

4 years agoaarch64: Add support for arm_sve_vector_bits
Richard Sandiford [Sat, 7 Mar 2020 11:52:33 +0000 (11:52 +0000)]
aarch64: Add support for arm_sve_vector_bits

This patch implements the "arm_sve_vector_bits" attribute, which can be
used to create fixed-length versions of an SVE type while maintaining
their "SVEness".  For example, when __ARM_FEATURE_SVE_BITS==256:

typedef svint32_t vec __attribute__((arm_sve_vector_bits(256)));

creates a 256-bit version of svint32_t.

The attribute itself is quite simple.  However, it means that we now
need to implement the full PCS rules for scalable types, whereas
previously we only needed to handle scalable types that were built
directly into the compiler.  See:

  https://github.com/ARM-software/abi-aa/blob/master/aapcs64/aapcs64.rst

for more information about these rules.

2020-04-09  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
* doc/sourcebuild.texi (aarch64_sve_hw, aarch64_sve128_hw)
(aarch64_sve256_hw, aarch64_sve512_hw, aarch64_sve1024_hw)
(aarch64_sve2048_hw): Document.
* config/aarch64/aarch64-protos.h
(aarch64_sve::handle_arm_sve_vector_bits_attribute): Declare.
* config/aarch64/aarch64-c.c (aarch64_update_cpp_builtins): Define
__ARM_FEATURE_SVE_VECTOR_OPERATIONS when SVE is enabled.
* config/aarch64/aarch64-sve-builtins.cc (matches_type_p): New
function.
(find_type_suffix_for_scalar_type): Use it instead of comparing
TYPE_MAIN_VARIANTs.
(function_resolver::infer_vector_or_tuple_type): Likewise.
(function_resolver::require_vector_type): Likewise.
(handle_arm_sve_vector_bits_attribute): New function.
* config/aarch64/aarch64.c (pure_scalable_type_info): New class.
(aarch64_attribute_table): Add arm_sve_vector_bits.
(aarch64_return_in_memory_1):
(pure_scalable_type_info::piece::get_rtx): New function.
(pure_scalable_type_info::num_zr): Likewise.
(pure_scalable_type_info::num_pr): Likewise.
(pure_scalable_type_info::get_rtx): Likewise.
(pure_scalable_type_info::analyze): Likewise.
(pure_scalable_type_info::analyze_registers): Likewise.
(pure_scalable_type_info::analyze_array): Likewise.
(pure_scalable_type_info::analyze_record): Likewise.
(pure_scalable_type_info::add_piece): Likewise.
(aarch64_some_values_include_pst_objects_p): Likewise.
(aarch64_returns_value_in_sve_regs_p): Use pure_scalable_type_info
to analyze whether the type is returned in SVE registers.
(aarch64_takes_arguments_in_sve_regs_p): Likwise whether the type
is passed in SVE registers.
(aarch64_pass_by_reference_1): New function, extracted from...
(aarch64_pass_by_reference): ...here.  Use pure_scalable_type_info
to analyze whether the type is a pure scalable type and, if so,
whether it should be passed by reference.
(aarch64_return_in_msb): Return false for pure scalable types.
(aarch64_function_value_1): Fold back into...
(aarch64_function_value): ...this function.  Use
pure_scalable_type_info to analyze whether the type is a pure
scalable type and, if so, which registers it should use.  Handle
types that include pure scalable types but are not themselves
pure scalable types.
(aarch64_return_in_memory_1): New function, split out from...
(aarch64_return_in_memory): ...here.  Use pure_scalable_type_info
to analyze whether the type is a pure scalable type and, if so,
whether it should be returned by reference.
(aarch64_layout_arg): Remove orig_mode argument.  Use
pure_scalable_type_info to analyze whether the type is a pure
scalable type and, if so, which registers it should use.  Handle
types that include pure scalable types but are not themselves
pure scalable types.
(aarch64_function_arg): Update call accordingly.
(aarch64_function_arg_advance): Likewise.
(aarch64_pad_reg_upward): On big-endian targets, return false for
pure scalable types that are smaller than 16 bytes.
(aarch64_member_type_forces_blk): New function.
(aapcs_vfp_sub_candidate): Exit early for built-in SVE types.
(aarch64_short_vector_p): Return false for VECTOR_TYPEs that
correspond to built-in SVE types.  Do not rely on a vector mode
if the type includes an pure scalable type.  When returning true,
assert that the mode is not an SVE mode.
(aarch64_vfp_is_call_or_return_candidate): Do not check for SVE
built-in types here.  When returning true, assert that the type
does not have an SVE mode.
(aarch64_can_change_mode_class): Don't allow anything to change
between a predicate mode and a non-predicate mode.  Also don't
allow changes between SVE vector modes and other modes that
might be bigger than 128 bits.
(aarch64_invalid_binary_op): Reject binary operations that mix
SVE and GNU vector types.
(TARGET_MEMBER_TYPE_FORCES_BLK): Define.

gcc/testsuite/
* gcc.target/aarch64/sve/acle/general/attributes_1.c: New test.
* gcc.target/aarch64/sve/acle/general/attributes_2.c: Likewise.
* gcc.target/aarch64/sve/acle/general/attributes_3.c: Likewise.
* gcc.target/aarch64/sve/acle/general/attributes_4.c: Likewise.
* gcc.target/aarch64/sve/acle/general/attributes_5.c: Likewise.
* gcc.target/aarch64/sve/acle/general/attributes_6.c: Likewise.
* gcc.target/aarch64/sve/acle/general/attributes_7.c: Likewise.
* gcc.target/aarch64/sve/pcs/struct.h: New file.
* gcc.target/aarch64/sve/pcs/struct_1_128.c: New test.
* gcc.target/aarch64/sve/pcs/struct_1_256.c: Likewise.
* gcc.target/aarch64/sve/pcs/struct_1_512.c: Likewise.
* gcc.target/aarch64/sve/pcs/struct_1_1024.c: Likewise.
* gcc.target/aarch64/sve/pcs/struct_1_2048.c: Likewise.
* gcc.target/aarch64/sve/pcs/struct_2_128.c: Likewise.
* gcc.target/aarch64/sve/pcs/struct_2_256.c: Likewise.
* gcc.target/aarch64/sve/pcs/struct_2_512.c: Likewise.
* gcc.target/aarch64/sve/pcs/struct_2_1024.c: Likewise.
* gcc.target/aarch64/sve/pcs/struct_2_2048.c: Likewise.
* gcc.target/aarch64/sve/pcs/struct_3_128.c: Likewise.
* gcc.target/aarch64/sve/pcs/struct_3_256.c: Likewise.
* gcc.target/aarch64/sve/pcs/struct_3_512.c: Likewise.
* lib/target-supports.exp (check_effective_target_aarch64_sve128_hw)
(check_effective_target_aarch64_sve512_hw)
(check_effective_target_aarch64_sve1024_hw)
(check_effective_target_aarch64_sve2048_hw): New procedures.

4 years agoaarch64: Add a separate "SVE sizeless type" attribute
Richard Sandiford [Fri, 13 Mar 2020 11:32:53 +0000 (11:32 +0000)]
aarch64: Add a separate "SVE sizeless type" attribute

It's more convenient for a later patch if sizelessness is represented
separately from "SVEness".  "SVEness" is an ABI property that carries
forward into gimple and beyond, and continues to matter during LTO.
Sizelessness is just a frontend restriction and can be ignored after
that.

2020-04-09  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
* config/aarch64/aarch64.c (aarch64_attribute_table): Add
"SVE sizeless type".
* config/aarch64/aarch64-sve-builtins.cc (make_type_sizeless)
(sizeless_type_p): New functions.
(register_builtin_types): Apply make_type_sizeless to the type.
(register_tuple_type): Likewise.
(verify_type_context): Use sizeless_type_p instead of builin_type_p.

4 years ago[Arm] Allow the use of arm_cde.h for C++
Matthew Malcomson [Thu, 9 Apr 2020 15:11:09 +0000 (16:11 +0100)]
[Arm] Allow the use of arm_cde.h for C++

arm_cde.h includes the arm_mve_types.h header, which declares some C++
overloaded functions.

There is a superfluous `extern "C"` statement in arm_cde.h, which
encompasses these functions.  This means that if compiling for C++, the
overloaded functions are declared, but are declared without name
mangling.  Hence all the function names are the same and we have many
conflicting declarations.

Testing Done:
  Regression tested for arm-none-eabi.

gcc/ChangeLog:

2020-04-09  Matthew Malcomson  <matthew.malcomson@arm.com>

* config/arm/arm_cde.h: Remove `extern "C"` when compiling for
C++.

gcc/testsuite/ChangeLog:

2020-04-09  Matthew Malcomson  <matthew.malcomson@arm.com>

* g++.target/arm/cde_mve.C: New test.

4 years agolibphobos: Remove --enable-druntime-gc configure option.
Iain Buclaw [Thu, 9 Apr 2020 15:07:43 +0000 (17:07 +0200)]
libphobos: Remove --enable-druntime-gc configure option.

This is yet another old option that would have been somewhat useful back
before the D front-end implementation was able to support compiling
without the Druntime library.

Now however, -fno-druntime makes the gcstub package redundant, so the
option has been removed, along with the package itself.

libphobos/ChangeLog:

* configure: Regenerate.
* libdruntime/Makefile.am (ALL_DRUNTIME_INSTALL_DSOURCES): Remove
DRUNTIME_DSOURCES_GC and DRUNTIME_DSOURCES_GCSTUB.
(DRUNTIME_DSOURCES): Add gc/*.d sources.
(DRUNTIME_DSOURCES_GC): Remove.
(DRUNTIME_DSOURCES_GCSTUB): Remove.
* libdruntime/Makefile.in: Regenerate.
* libdruntime/gcstub/gc.d: Remove.
* m4/druntime.m4 (DRUNTIME_GC): Remove.

4 years ago[testsuite][arm] Fix cmse-15.c expected output
Christophe Lyon [Thu, 9 Apr 2020 14:01:22 +0000 (14:01 +0000)]
[testsuite][arm] Fix cmse-15.c expected output

The cmse-15.c testcase fails at -Os because ICF means that we
generate
nonsecure2:
        b       nonsecure0

which is OK, but does not match the currently expected
nonsecure2:
...
        bl      __gnu_cmse_nonsecure_call

(see https://gcc.gnu.org/pipermail/gcc-patches/2020-April/543190.html)

The test has already different expectations for v8-M and v8.1-M.

This patch uses check-function-bodies to account for the
different possibilities:
- v8-M vs v8.1-M via different target selectors where needed
- code generation variants (-0?) via multiple regexps

I've tested that the test now passes with --target-board=-march=armv8-m.main
and --target-board=-march=armv8.1-m.main.

4 years ago[testsuite] scanasm.exp: Fix target-selector handling in check-function-bodies
Christophe Lyon [Thu, 9 Apr 2020 13:56:44 +0000 (13:56 +0000)]
[testsuite] scanasm.exp: Fix target-selector handling in check-function-bodies

{target { ! a } } does not work because the greedy regexp extracts
"! a }" instead of "target { ! a }".

This patch replaces it with a non-greedy regexp.

2020-04-09  Christophe Lyon  <christophe.lyon@linaro.org>

* lib/scanasm.exp (check-function-bodies): Use non-greedy regexp
when extracting the target selector.

4 years agoMerge top-level configury changes from gdb
Tom Tromey [Thu, 9 Apr 2020 12:52:55 +0000 (06:52 -0600)]
Merge top-level configury changes from gdb

We recently rearranged the gdb source tree to move a common library
and gdbserver to the top-level.  This made the build more uniform and
also a bit faster (due to sharing of built objects).

This patch re-syncs these changes the top-level configury back to gcc.

ChangeLog:
* configure: Rebuild.
* Makefile.in: Rebuild.
* Makefile.def (gdbsupport, gdbserver): New host modules.
(configure-gdb): Depend on all-gdbsupport.
(all-gdb): Depend on all-gdbsupport, all-libctf.
* configure.ac (host_tools): Add gdbserver.
Conditionally build gdbserver and gdbsupport.

4 years agosra: Fix sra_modify_expr handling of partial writes (PR 94482)
Martin Jambor [Thu, 9 Apr 2020 12:37:21 +0000 (14:37 +0200)]
sra: Fix sra_modify_expr handling of partial writes (PR 94482)

when sra_modify_expr is invoked on an expression that modifies only
part of the underlying replacement, such as a BIT_FIELD_REF on a LHS
of an assignment and the SRA replacement's type is not compatible with
what is being replaced (0th operand of the B_F_R in the above
example), it does not work properly, basically throwing away the partd
of the expr that should have stayed intact.

This is fixed in two ways.  For BIT_FIELD_REFs, which operate on the
binary image of the replacement (and so in a way serve as a
VIEW_CONVERT_EXPR) we just do not bother with convertsing.  For
REALPART_EXPRs and IMAGPART_EXPRs, if the replacement is not a
register, we insert a VIEW_CONVERT_EXPR under
the complex partial access expression, which is always OK, for loads
from registers we take the extra step of converting it to a temporary.

This revealed a bug in fwprop which is fixed with the hunk from Richi.

The testcase for handling REALPART_EXPR and IMAGPART_EXPR is a bit
fragile because SRA prefers complex and vector types over anything
else (and in between the two it decides based on TYPE_UID which in my
testing today always preferred complex types) and so I only run it at
-O1 (which is the only level where the the test fails for me).

Bootstrapped and tested on x86_64-linux, i686-linux and aarch64-linux.

2020-04-09  Martin Jambor  <mjambor@suse.cz>
    Richard Biener  <rguenther@suse.de>

PR tree-optimization/94482
* tree-sra.c (create_access_replacement): Dump new replacement with
TDF_UID.
(sra_modify_expr): Fix handling of cases when the original EXPR writes
to only part of the replacement.
* tree-ssa-forwprop.c (pass_forwprop::execute): Properly verify
the first operand of combinations into REAL/IMAGPART_EXPR and
BIT_FIELD_REF.

testsuite/
* gcc.dg/torture/pr94482.c: New test.
* gcc.dg/tree-ssa/pr94482-2.c: Likewise.

4 years agoc++: Fix wrong paren-init of aggregates interference [PR93790]
Marek Polacek [Wed, 8 Apr 2020 21:03:53 +0000 (17:03 -0400)]
c++: Fix wrong paren-init of aggregates interference [PR93790]

This PR points out that we are rejecting valid code in C++20.  The
problem is that we were surreptitiously transforming

  T& t(e)

into

  T& t{e}

which is wrong, because the type of e had a conversion function to T,
while aggregate initialization of t from e doesn't work.  Therefore, I
was violating a design principle of P0960, which says that any existing
meaning of A(b) should not change.  So I think we should only attempt to
aggregate-initialize if the original expression was ill-formed.

Another design principle is that () should work where {} works, so this:

  struct S { int i; };
  const S& s(1);

has to keep working.  Thus the special handling for paren-lists with one
element.  (A paren-list with more than one element would give you "error:
expression list treated as compound expression in initializer" C++17.)

PR c++/93790
* call.c (initialize_reference): If the reference binding failed, maybe
try initializing from { }.
* decl.c (grok_reference_init): For T& t(e), set
LOOKUP_AGGREGATE_PAREN_INIT but don't build up a constructor yet.

* g++.dg/cpp2a/paren-init23.C: New test.
* g++.dg/init/aggr14.C: New test.

4 years agoFix typo in my previous change.
Jan Hubicka [Thu, 9 Apr 2020 12:16:34 +0000 (14:16 +0200)]
Fix typo in my previous change.

4 years agoAvoid g++.dg/lto/alias-4_0.C test failure on ARM [PR91322]
Jan Hubicka [Thu, 9 Apr 2020 12:12:36 +0000 (14:12 +0200)]
Avoid g++.dg/lto/alias-4_0.C test failure on ARM [PR91322]

PR tree-optimization/91322
* g++.dg/lto/alias-4_0.C: Avoid conflict with va_list on ARM and add
a template testing that.

4 years agotestsuite: Tweak check-function-bodies interface
Richard Sandiford [Tue, 17 Mar 2020 15:26:22 +0000 (15:26 +0000)]
testsuite: Tweak check-function-bodies interface

In g:2171a9207f51bc486ed9c502cb4da706f594615e I'd tried to fix
various ILP32 testsuite failures by restricting some tests to LP64.
Unfortunately, I messed up the check-function-bodies syntax and passed
the target selector as the "option" parameter, which had the effect of
disabling the tests for both ILP32 and LP64.

The fix ought to have been to add "" as the option parameter.  However,
check-function-bodies wasn't treating "" in the same way as an omitted
argument.  The easiest fix seemed to be turn the argument into a list of
options, which also makes the interface a bit more general.

Having done that, it seemed a good idea to check for things that look
like target/xfail selectors, so that the mistake isn't silent next time.

2020-04-09  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
* doc/sourcebuild.texi (check-function-bodies): Treat the third
parameter as a list of option regexps and require each regexp
to match.

gcc/testsuite/
* lib/scanasm.exp (check-function-bodies): Treat the third
parameter as a list of option regexps and require each regexp
to match.  Check for cases in which a target/xfail selector
was mistakenly passed to the options argument.
* gcc.target/aarch64/sve/pcs/args_1.c: Add an empty options list
to the invocation of check-function-bodies.
* gcc.target/aarch64/sve/pcs/args_2.c: Likewise.
* gcc.target/aarch64/sve/pcs/args_3.c: Likewise.
* gcc.target/aarch64/sve/pcs/args_4.c: Likewise.
* gcc.target/aarch64/sve/pcs/return_1.c: Likewise.
* gcc.target/aarch64/sve/pcs/return_1_1024.c: Likewise.
* gcc.target/aarch64/sve/pcs/return_1_128.c: Likewise.
* gcc.target/aarch64/sve/pcs/return_1_2048.c: Likewise.
* gcc.target/aarch64/sve/pcs/return_1_256.c: Likewise.
* gcc.target/aarch64/sve/pcs/return_1_512.c: Likewise.
* gcc.target/aarch64/sve/pcs/return_2.c: Likewise.
* gcc.target/aarch64/sve/pcs/return_3.c: Likewise.
* gcc.target/aarch64/sve/pcs/return_4.c: Likewise.
* gcc.target/aarch64/sve/pcs/return_4_1024.c: Likewise.
* gcc.target/aarch64/sve/pcs/return_4_128.c: Likewise.
* gcc.target/aarch64/sve/pcs/return_4_2048.c: Likewise.
* gcc.target/aarch64/sve/pcs/return_4_256.c: Likewise.
* gcc.target/aarch64/sve/pcs/return_4_512.c: Likewise.
* gcc.target/aarch64/sve/pcs/return_5.c: Likewise.
* gcc.target/aarch64/sve/pcs/return_5_1024.c: Likewise.
* gcc.target/aarch64/sve/pcs/return_5_128.c: Likewise.
* gcc.target/aarch64/sve/pcs/return_5_2048.c: Likewise.
* gcc.target/aarch64/sve/pcs/return_5_256.c: Likewise.
* gcc.target/aarch64/sve/pcs/return_5_512.c: Likewise.
* gcc.target/aarch64/sve/pcs/return_6.c: Likewise.
* gcc.target/aarch64/sve/pcs/return_6_1024.c: Likewise.
* gcc.target/aarch64/sve/pcs/return_6_128.c: Likewise.
* gcc.target/aarch64/sve/pcs/return_6_2048.c: Likewise.
* gcc.target/aarch64/sve/pcs/return_6_256.c: Likewise.
* gcc.target/aarch64/sve/pcs/return_6_512.c: Likewise.
* gcc.target/aarch64/sve/pcs/saves_2_be_nowrap.c: Likewise.
* gcc.target/aarch64/sve/pcs/saves_2_be_wrap.c: Likewise.
* gcc.target/aarch64/sve/pcs/saves_2_le_nowrap.c: Likewise.
* gcc.target/aarch64/sve/pcs/saves_2_le_wrap.c: Likewise.
* gcc.target/aarch64/sve/pcs/saves_3.c: Likewise.
* gcc.target/aarch64/sve/pcs/saves_4_be.c: Likewise.
* gcc.target/aarch64/sve/pcs/saves_4_le.c: Likewise.
* gcc.target/aarch64/sve/pcs/stack_clash_2_128.c: Likewise.
* gcc.target/aarch64/sve/pcs/varargs_1.c: Likewise.
* gcc.target/aarch64/sve/pcs/varargs_2_f16.c: Likewise.
* gcc.target/aarch64/sve/pcs/varargs_2_f32.c: Likewise.
* gcc.target/aarch64/sve/pcs/varargs_2_f64.c: Likewise.
* gcc.target/aarch64/sve/pcs/varargs_2_s16.c: Likewise.
* gcc.target/aarch64/sve/pcs/varargs_2_s32.c: Likewise.
* gcc.target/aarch64/sve/pcs/varargs_2_s64.c: Likewise.
* gcc.target/aarch64/sve/pcs/varargs_2_s8.c: Likewise.
* gcc.target/aarch64/sve/pcs/varargs_2_u16.c: Likewise.
* gcc.target/aarch64/sve/pcs/varargs_2_u32.c: Likewise.
* gcc.target/aarch64/sve/pcs/varargs_2_u64.c: Likewise.
* gcc.target/aarch64/sve/pcs/varargs_2_u8.c: Likewise.

4 years agotestsuite/93369 - use -shared to avoid issue with ODR violation
Richard Biener [Thu, 9 Apr 2020 11:54:01 +0000 (13:54 +0200)]
testsuite/93369 - use -shared to avoid issue with ODR violation

The testcase contains an ODR violation and thus the observed
link failure is an accepted outcome (it originally was for
an ICE during WPA).  Thus the following adds -shared to the link.

2020-04-09  Richard Biener  <rguenther@suse.de>

PR testsuite/93369
* g++.dg/lto/pr64076_0.C: Add -shared -fPIC.
* g++.dg/lto/pr64076_1.C: Add -fPIC.

4 years agoPR target/94530
Andrea Corallo [Wed, 8 Apr 2020 12:38:28 +0000 (13:38 +0100)]
PR target/94530

gcc/ChangeLog

2020-04-09  Andrea Corallo  <andrea.corallo@arm.com>

PR target/94530
* config/aarch64/falkor-tag-collision-avoidance.c
(valid_src_p): Fix missing rtx type check.

gcc/testsuite/ChangeLog

2020-04-09  Andrea Corallo  <andrea.corallo@arm.com>

* gcc.target/aarch64/pr94530.c: New test.

4 years agoAdd unsigned type iv_cand for iv_use with non mode-precision type
Bin Cheng [Thu, 9 Apr 2020 08:42:48 +0000 (16:42 +0800)]
Add unsigned type iv_cand for iv_use with non mode-precision type

Precisely,  for iv_use if it's not integer/pointer type, or non-mode
precision type, add candidate for the corresponding scev in unsigned
type with the same precision, rather than its original type.

gcc/
    PR tree-optimization/93674
    * tree-ssa-loop-ivopts.c (langhooks.h): New include.
    (add_iv_candidate_for_use): For iv_use of non integer or pointer type,
    or non-mode precision type, add candidate in unsigned type with the
    same precision.

gcc/testsuite/
    PR tree-optimization/93674
    * g++.dg/pr93674.C: New test.

4 years agocoroutines: Add cleanups, where required, to statements with captured references.
Iain Sandoe [Wed, 8 Apr 2020 07:15:00 +0000 (08:15 +0100)]
coroutines: Add cleanups, where required, to statements with captured references.

When we promote captured temporaries to local variables, we also
remove their initializers from the relevant call expression.  This
means that we should recompute the need for a cleanup expression
once the set of temporaries that remains becomes known.

gcc/cp/ChangeLog:

2020-04-08  Iain Sandoe  <iain@sandoe.co.uk>
    Jun Ma  <JunMa@linux.alibaba.com>

* coroutines.cc (maybe_promote_captured_temps): Add a
cleanup expression, if needed, to any call from which
we promoted temporaries captured by reference.

4 years agoRequire pthread effective target for test case using -pthread option.
Sandra Loosemore [Thu, 9 Apr 2020 03:55:20 +0000 (20:55 -0700)]
Require pthread effective target for test case using -pthread option.

2020-04-08  Sandra Loosemore  <sandra@codesourcery.com>

gcc/testsuite/
* g++.dg/tree-ssa/pr93940.C: Require pthread target.

4 years agoWhoops, fix wrong PR number in the changelog
Kewen Lin [Thu, 9 Apr 2020 02:57:52 +0000 (21:57 -0500)]
Whoops, fix wrong PR number in the changelog

4 years ago[testsuite] Fix PR94079 by respecting vect_hw_misalign [PR94079]
Kewen Lin [Thu, 9 Apr 2020 02:52:00 +0000 (21:52 -0500)]
[testsuite] Fix PR94079 by respecting vect_hw_misalign [PR94079]

This is another vect case which requires special handling with
vect_hw_misalign.  The alignment of the second part requires
misaligned vector access supports.  This patch is to adjust
the related guard condition and comments.

Verified it on ppc64-redhat-linux (Power7 BE).

2020-04-09  Kewen Lin  <linkw@gcc.gnu.org>

gcc/testsuite/ChangeLog

    PR testsuite/94023
    * gfortran.dg/vect/pr83232.f90: Expect 2 rather than 3 times SLP on
    non-vect_hw_misalign targets.

4 years agoDaily bump.
GCC Administrator [Thu, 9 Apr 2020 00:16:16 +0000 (00:16 +0000)]
Daily bump.

4 years agolibphobos: Add --enable-libphobos-checking configure option
Iain Buclaw [Wed, 8 Apr 2020 22:41:14 +0000 (00:41 +0200)]
libphobos: Add --enable-libphobos-checking configure option

As GDCFLAGS is overriden by the top-level make file with '-O2 -g',
libphobos ends up always being built with all contracts, invariants, and
asserts compiled in.  This adds a new configurable that defaults to omit
compiling any run-time checks into the library using '-frelease'.

Other choices either set the flags '-fno-release', enabling all run-time
checks, or '-fassert', which only compiles in asserts.

The omission of compiling in contracts results in a smaller library
size, with faster build times.

libphobos/ChangeLog:

PR d/94305
* Makefile.in: Regenerate.
* configure: Regenerate.
* configure.ac: Add --enable-libphobos-checking and substitute
CHECKING_DFLAGS.  Remove -frelease from GDCFLAGS.
* libdruntime/Makefile.am: Add CHECKING_DFLAGS to AM_DFLAGS.
* libdruntime/Makefile.in: Regenerate.
* src/Makefile.am: Add CHECKING_DFLAGS to AM_DFLAGS.
* src/Makefile.in: Regenerate.
* testsuite/Makefile.in: Regenerate.
* testsuite/testsuite_flags.in: Add -fno-release -funittest to
--gdcflags.

4 years agolibphobos: Remove --enable-thread-lib configure option.
Iain Buclaw [Wed, 8 Apr 2020 22:16:57 +0000 (00:16 +0200)]
libphobos: Remove --enable-thread-lib configure option.

This is another old option that doesn't make sense as a configurable.
So the option has been removed, and the check for AC_SEARCH_LIBS moved
into the main configure.ac file.

libphobos/ChangeLog:

* configure: Regenerate.
* configure.ac: Use AC_SEARCH_LIBS for pthread_create.
* m4/druntime/libraries.m4: Remove DRUNTIME_LIBRARIES_THREAD.

4 years agors6000: Link with libc128.a for long-double-128.
Clement Chigot [Wed, 8 Apr 2020 20:58:36 +0000 (16:58 -0400)]
rs6000: Link with libc128.a for long-double-128.

AIX applications using 128-bit long double must be linked with
libc128.a, in order to have 128-bit compatible routines.

AIX 7.2, 7.1, 6.1: Build/Tests: OK

2020-04-03 Clément Chigot <clement.chigot@atos.net>

* config/rs6000/aix61.h (LIB_SPEC): Add -lc128 with -mlong-double-128.
* config/rs6000/aix71.h (LIB_SPEC): Likewise.
* config/rs6000/aix72.h (LIB_SPEC): Likewise.

4 years agolibphobos: Remove --enable-unix configure option.
Iain Buclaw [Wed, 8 Apr 2020 20:52:05 +0000 (22:52 +0200)]
libphobos: Remove --enable-unix configure option.

This option is not useful on its own as all posix modules require the
compiler to predefine version(Posix) anyway.  So the option has been
removed, and logic moved into DRUNTIME_OS_SOURCES, where the conditional
DRUNTIME_OS_POSIX is set instead.

libphobos/ChangeLog:

* configure: Regenerate.
* configure.ac: Remove DRUNTIME_OS_UNIX.
* libdruntime/Makefile.am: Add DRUNTIME_DSOURCES_POSIX if
DRUNTIME_OS_POSIX is true.
* libdruntime/Makefile.in: Regenerate.
* m4/druntime/os.m4 (DRUNTIME_OS_UNIX): Remove, move AM_CONDITIONAL
logic to...
(DRUNTIME_OS_SOURCES): ...here.  Rename conditional to
DRUNTIME_OS_POSIX.

4 years agocselib, reload: Fix cselib ICE on m68k/microblaze [PR94526]
Jakub Jelinek [Wed, 8 Apr 2020 19:23:58 +0000 (21:23 +0200)]
cselib, reload: Fix cselib ICE on m68k/microblaze [PR94526]

The following testcase ICEs on m68k (and another one Jeff mailed me
privately on microblaze).
The problem is that reload creates two DEBUG_INSNs with the same
value of (plus:P (reg:P sp) (const_int 0)), we compute correctly the
same hash value for them, but then don't find them in the cselib hash table,
as rtx_equal_for_cselib_1 thinks it is different from (reg:P sp),
and trigger an assertion failure that requires that from two different debug
insns one doesn't add locations to VALUEs.

The patch has two fixes for this, each fixes the ICE on both targets
separately, but I think we want both.

The cselib.c change ensures that rtx_equal_for_cselib_1 considers
(value:P sp_derived_value) and (plus:P (reg:P sp) (const_int 0)) equivalent.

The reload1.c change makes sure we don't create those bogus plus 0
expressions.  I understand the reasons for creating them, but they don't
really apply to DEBUG_INSNs; we don't have validity matching there, all we
care is that the expressions aren't arbitrarily deep, but it is just fine
to fold x + 0 into just x in there.

2020-04-08  Jakub Jelinek  <jakub@redhat.com>

PR middle-end/94526
* cselib.c (autoinc_split): Handle e->val_rtx being SP_DERIVED_VALUE_P
with zero offset.
* reload1.c (eliminate_regs_1): Avoid creating
(plus (reg) (const_int 0)) in DEBUG_INSNs.

* gcc.dg/pr94526.c: New test.

4 years agovect: Fix up lowering of TRUNC_MOD_EXPR by negative constant [PR94524]
Jakub Jelinek [Wed, 8 Apr 2020 19:22:05 +0000 (21:22 +0200)]
vect: Fix up lowering of TRUNC_MOD_EXPR by negative constant [PR94524]

The first testcase below is miscompiled, because for the division part
of the lowering we canonicalize negative divisors to their absolute value
(similarly how expmed.c canonicalizes it), but when multiplying the division
result back by the VECTOR_CST, we use the original constant, which can
contain negative divisors.

Fixed by computing ABS_EXPR of the VECTOR_CST.  Unfortunately, fold-const.c
doesn't support const_unop (ABS_EXPR, VECTOR_CST) and I think it is too late
in GCC 10 cycle to add it now.

Furthermore, while modulo by most negative constant happens to return the
right value, it does that only by invoking UB in the IL, because
we then expand division by that 1U+INT_MAX and say for INT_MIN % INT_MIN
compute the division as -1, and then multiply by INT_MIN, which is signed
integer overflow.  We in theory could do the computation in unsigned vector
types instead, but is it worth bothering.  People that are doing % INT_MIN
are either testing for standard conformance, or doing something wrong.
So, I've also added punting on % INT_MIN, both in vect lowering and vect
pattern recognition (we punt already for / INT_MIN).

2020-04-08  Jakub Jelinek  <jakub@redhat.com>

PR tree-optimization/94524
* tree-vect-generic.c (expand_vector_divmod): If any elt of op1 is
negative for signed TRUNC_MOD_EXPR, multiply with absolute value of
op1 rather than op1 itself at the end.  Punt for signed modulo by
most negative constant.
* tree-vect-patterns.c (vect_recog_divmod_pattern): Punt for signed
modulo by most negative constant.

* gcc.c-torture/execute/pr94524-1.c: New test.
* gcc.c-torture/execute/pr94524-2.c: New test.

4 years agotestsuite: Fix up pr94314*.C tests [PR94314]
Jakub Jelinek [Wed, 8 Apr 2020 18:04:01 +0000 (20:04 +0200)]
testsuite: Fix up pr94314*.C tests [PR94314]

The test FAIL everywhere where size_t is not unsigned long.  Fixed by
using __SIZE_TYPE__ instead.

2020-04-08  Jakub Jelinek  <jakub@redhat.com>

PR c++/94314
* g++.dg/pr94314.C (A::operator new, B::operator new, C::operator new):
Use __SIZE_TYPE__ instead of unsigned long.
* g++.dg/pr94314-3.C (base::operator new, B::operator new): Likewise.

4 years agoopenacc: Fix up declare-pr94120.C testcase [PR94533]
Jakub Jelinek [Wed, 8 Apr 2020 17:54:35 +0000 (19:54 +0200)]
openacc: Fix up declare-pr94120.C testcase [PR94533]

This test has been put in a wrong directory, where OpenACC tests aren't
tested with -fopenacc, and also contained trailing semicolons.
I've moved it where it belongs, added dg-error directives and removed
the extra semicolons.

2020-04-08  Jakub Jelinek  <jakub@redhat.com>

PR middle-end/94120
PR testsuite/94533
* g++.dg/declare-pr94120.C: Move test to ...
* g++.dg/goacc/declare-pr94120.C: ... here.  Add dg-error directives.

4 years agoc++: Fix ICE-on-invalid with lambda template [PR94507]
Marek Polacek [Mon, 6 Apr 2020 23:59:04 +0000 (19:59 -0400)]
c++: Fix ICE-on-invalid with lambda template [PR94507]

While reducing something else I noticed that we ICE on the following
invalid code.  In tsubst_lambda_expr, tsubst_template_decl has already
reported an error and returned the error_mark_node, so make sure we
don't ICE on that.  I'm using a goto here because we still have to
do finish_struct because it does popclass ().

PR c++/94507 - ICE-on-invalid with lambda template.
* pt.c (tsubst_lambda_expr): Cope when tsubst_template_decl or
tsubst_function_decl returns error_mark_node.

* g++.dg/cpp2a/lambda-generic7.C: New test.

4 years agortl-optimization/93946 - fix TBAA for redundant store removal in CSE
Richard Biener [Wed, 8 Apr 2020 12:04:35 +0000 (14:04 +0200)]
rtl-optimization/93946 - fix TBAA for redundant store removal in CSE

It turns out RTL CSE tries to remove redundant stores but fails to
do the usual validity check what such a change is TBAA neutral to
later loads.

This now triggers with the PR93946 testcases on nios2.

2020-04-08  Richard Biener  <rguenther@suse.de>

PR rtl-optimization/93946
* cse.c (cse_insn): Record the tabled expression in
src_related.  Verify a redundant store removal is valid.

4 years agoadd missing fp16 options
Alexandre Oliva [Wed, 8 Apr 2020 17:24:29 +0000 (14:24 -0300)]
add missing fp16 options

dg-require-effective-target arm_fp16_alternative_ok may pass even when
arm_fp16_ok doesn't, and the latter's failure inhibits dg-add-options
arm_fp16_alternative.  Requiring arm_fp16_ok would disable the test,
but if we just pass it the -mfp16-format=alternative option, it passes
even without arm_fp16_ok.  Sibling test fp16-aapcs-4.c underwent a
similar change, so I'm proposing the explicit option to fp16-aapcs-3.c
as well.

for  gcc/testsuite/ChangeLog

* gcc.target/arm/fp16-aapcs-3.c: Explicitly use the
-mfp16-format=alternative option.

4 years agox86: Insert ENDBR if function will be called indirectly
H.J. Lu [Wed, 8 Apr 2020 16:47:35 +0000 (09:47 -0700)]
x86: Insert ENDBR if function will be called indirectly

Since constant_call_address_operand has

;; Test for a pc-relative call operand
(define_predicate "constant_call_address_operand"
  (match_code "symbol_ref")
{
  if (ix86_cmodel == CM_LARGE || ix86_cmodel == CM_LARGE_PIC
      || flag_force_indirect_call)
    return false;
  if (TARGET_DLLIMPORT_DECL_ATTRIBUTES && SYMBOL_REF_DLLIMPORT_P (op))
    return false;
  return true;
})

even if cgraph_node::get (cfun->decl)->only_called_directly_p () returns
false, the fuction may still be called indirectly.  Copy the logic from
constant_call_address_operand to rest_of_insert_endbranch to insert ENDBR
at function entry if function will be called indirectly.

gcc/

PR target/94417
* config/i386/i386-features.c (rest_of_insert_endbranch): Insert
ENDBR at function entry if function will be called indirectly.

gcc/testsuite/

PR target/94417
* gcc.target/i386/pr94417-1.c: New test.
* gcc.target/i386/pr94417-2.c: Likewise.
* gcc.target/i386/pr94417-3.c: Likewise.

4 years agoi386: Don't use AVX512F integral masks for V*TImode [PR94438]
Jakub Jelinek [Wed, 8 Apr 2020 16:24:12 +0000 (18:24 +0200)]
i386: Don't use AVX512F integral masks for V*TImode [PR94438]

The ix86_get_mask_mode hook uses int mask for 512-bit vectors or 128/256-bit
vectors with AVX512VL (that is correct), and only for V*[SD][IF]mode if not
AVX512BW (also correct), but with AVX512BW it would stop checking the
elem_size altogether and pretend the hw has masking support for V*TImode
etc., which it doesn't.  That can lead to various ICEs later on.

2020-04-08  Jakub Jelinek  <jakub@redhat.com>

PR target/94438
* config/i386/i386.c (ix86_get_mask_mode): Only use int mask for elem_size
1, 2, 4 and 8.

* gcc.target/i386/avx512bw-pr94438.c: New test.
* gcc.target/i386/avx512vlbw-pr94438.c: New test.

4 years agoMove gfortran.dg/dec_math_5.f90 to ./ieee/
Tobias Burnus [Wed, 8 Apr 2020 15:54:04 +0000 (17:54 +0200)]
Move gfortran.dg/dec_math_5.f90 to ./ieee/

PR fortran/93871
* gfortran.dg/dec_math_5.f90: Move to ...
* gfortran.dg/ieee/dec_math_1.f90: ... here; change
dg-options to dg-additional-options.

4 years agolibstdc++: Add comparison operators to types from Numerics clause
Jonathan Wakely [Wed, 8 Apr 2020 15:51:59 +0000 (16:51 +0100)]
libstdc++: Add comparison operators to types from Numerics clause

Some more C++20 changes from P1614R2, "The Mothership has Landed".

* include/bits/slice_array.h (operator==(const slice&, const slice&)):
Define for C++20.
* include/std/complex (operator==(const T&, const complex<T>&))
(operator!=(const complex<T>&, const complex<T>&))
(operator!=(const complex<T>&, const T&))
(operator!=(const T&, const complex<T>&)): Do not declare for C++20.
* testsuite/26_numerics/slice/compare.cc: New test.

4 years agorequire tls_runtime for tls execution test
Alexandre Oliva [Wed, 8 Apr 2020 15:41:52 +0000 (12:41 -0300)]
require tls_runtime for tls execution test

All TLS execution tests require tls_runtime, not just tls; pr78796.c
is the only exception that is not otherwise limited to platforms known
to support it.  I suppose that's an oversight.  On a platform whose
linker is configured to disregard TLS relocations, this test compiles
and assembles successfully, but execution fails.  The tls_runtime
requirement target avoids the noise from the expected failure.

for  gcc/testsuite/ChangeLog

* gcc.dg/tls/pr78796.c: Require tls_runtime.

4 years agoAllow new/delete operator deletion only for replaceable.
Martin Liska [Wed, 8 Apr 2020 15:16:55 +0000 (17:16 +0200)]
Allow new/delete operator deletion only for replaceable.

PR c++/94314
* gimple.c (gimple_call_operator_delete_p): Rename to...
(gimple_call_replaceable_operator_delete_p): ... this.
Use DECL_IS_REPLACEABLE_OPERATOR_DELETE_P.
* gimple.h (gimple_call_operator_delete_p): Rename to ...
(gimple_call_replaceable_operator_delete_p): ... this.
* tree-core.h (tree_function_decl): Add replaceable_operator
flag.
* tree-ssa-dce.c (mark_all_reaching_defs_necessary_1):
Use DECL_IS_REPLACEABLE_OPERATOR_DELETE_P.
(propagate_necessity): Use gimple_call_replaceable_operator_delete_p.
(eliminate_unnecessary_stmts): Likewise.
* tree-streamer-in.c (unpack_ts_function_decl_value_fields):
Pack DECL_IS_REPLACEABLE_OPERATOR.
* tree-streamer-out.c (pack_ts_function_decl_value_fields):
Unpack the field here.
* tree.h (DECL_IS_REPLACEABLE_OPERATOR): New.
(DECL_IS_REPLACEABLE_OPERATOR_NEW_P): New.
(DECL_IS_REPLACEABLE_OPERATOR_DELETE_P): New.
* cgraph.c (cgraph_node::dump): Dump if an operator is replaceable.
* ipa-icf.c (sem_item::compare_referenced_symbol_properties): Compare
replaceable operator flags.
PR c++/94314
* decl.c (duplicate_decls): Duplicate also DECL_IS_REPLACEABLE_OPERATOR.
(cxx_init_decl_processing): Mark replaceable all implicitly defined
operators.
PR c++/94314
* lto-common.c (compare_tree_sccs_1): Compare also
DECL_IS_REPLACEABLE_OPERATOR.
PR c++/94314
* g++.dg/pr94314-2.C: New test.
* g++.dg/pr94314-3.C: New test.
* g++.dg/pr94314.C: New test.

4 years agolibstdc++: Add comparison operators to <charconv> result types
Jonathan Wakely [Wed, 8 Apr 2020 15:16:10 +0000 (16:16 +0100)]
libstdc++: Add comparison operators to <charconv> result types

Some more C++20 changes from P1614R2, "The Mothership has Landed".

* include/std/charconv (to_chars_result, from_chars_result): Add
defaulted equality comparisons for C++20.
* testsuite/20_util/from_chars/compare.cc: New test.
* testsuite/20_util/to_chars/compare.cc: New test.