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* [Bug tree-optimization/91071] [10 Regression] Miscompare of 410.bwaves since r272644
[not found] <bug-91071-4@http.gcc.gnu.org/bugzilla/>
@ 2019-07-03 12:28 ` marxin at gcc dot gnu.org
0 siblings, 0 replies; only message in thread
From: marxin at gcc dot gnu.org @ 2019-07-03 12:28 UTC (permalink / raw)
To: gcc-bugs
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91071
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Blocks| |26163
--- Comment #6 from Martin Liška <marxin at gcc dot gnu.org> ---
The benchmark somehow iterates and we differ in in bwaves2.out, which is: "The
residual for convergence after each time step".
Following configuration tweak fixes the issue:
diff --git a/benchspec/CPU2006/410.bwaves/Spec/object.pm
b/benchspec/CPU2006/410.bwaves/Spec/object.pm
index 242ca26d..0a343023 100644
--- a/benchspec/CPU2006/410.bwaves/Spec/object.pm
+++ b/benchspec/CPU2006/410.bwaves/Spec/object.pm
@@ -4,7 +4,7 @@ $exename = 'bwaves';
$benchlang = 'F'; # was F77, in the olden days
@base_exe = ($exename);
-$reltol = {'bwaves2.out' => 0.015,
+$reltol = {'bwaves2.out' => 0.018,
'bwaves3.out' => 0.000001,
'default' => undef};
I tend to close this as invalid..
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=26163
[Bug 26163] [meta-bug] missed optimization in SPEC (2k17, 2k and 2k6 and 95)
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Subject: [Bug tree-optimization/91069] [10 Regression] Miscompare of 453.povray since r272843
Date: Wed, 03 Jul 2019 12:47:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91069
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug tree-optimization/91069] [10 Regression] Miscompare of 453.povray since r272843
Date: Wed, 03 Jul 2019 12:47:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91069
--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Jul 3 12:47:07 2019
New Revision: 273007
URL: https://gcc.gnu.org/viewcvs?rev=273007&root=gcc&view=rev
Log:
2019-07-03 Richard Biener <rguenther@suse.de>
PR middle-end/91069
* match.pd (vec_perm -> bit_insert): Fix element read from
first vector.
* gcc.dg/pr91069.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/pr91069.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/match.pd
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-648134-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 03 12:48:29 2019
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Subject: [Bug middle-end/91060] [10 regression] gcc.c-torture/execute/scal-to-vec1.c fails on armeb-none-linux-gnueabihf since r272843
Date: Wed, 03 Jul 2019 12:48:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91060
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
I think this may be possibly a dup of the just fixed PR91069. Please close if
the testcases now pass or report back otherwise.
>From gcc-bugs-return-648135-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 03 12:51:39 2019
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/91070] Spurious notes about uninitialized members in C++17
Date: Wed, 03 Jul 2019 12:51:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91070
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I think it's same bug.
*** This bug has been marked as a duplicate of bug 90243 ***
>From gcc-bugs-return-648136-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 03 12:51:39 2019
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/90243] diagnostic notes that belong to a suppressed error about an uninitialized variable in a constexpr function are still shown
Date: Wed, 03 Jul 2019 12:51:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |bugs at qult dot net
--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
*** Bug 91070 has been marked as a duplicate of this bug. ***
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From: "mark at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug debug/90981] [9/10 Regression] ICE in dwarf2out_finish, at dwarf2out.c:31644
Date: Wed, 03 Jul 2019 13:08:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90981
--- Comment #6 from Mark Wielaard <mark at gcc dot gnu.org> ---
Author: mark
Date: Wed Jul 3 13:08:01 2019
New Revision: 273008
URL: https://gcc.gnu.org/viewcvs?rev=273008&root=gcc&view=rev
Log:
PR debug/90981 Empty .debug_addr crashes -gdwarf-5 -gsplit-dwarf
Even if there was no, or an empty address list we would try to generate
a header for the .debug_addr section with -gdwarf-5 and -gsplit-dwarf.
The skeleton DIE would also get a (dangling) DW_AT_addr_base in that case.
PR debug/90981
* dwarf2out.c (add_top_level_skeleton_die_attrs): Only add
DW_AT_addr_base if there is actually a .debug_addr section with
addresses.
(output_addr_table): Add DWARF5 table header generation here after
checking there are actually any addresses from...
(dwarf2out_finish): ...here.
* testsuite/g++.dg/pr90981.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/pr90981.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/dwarf2out.c
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From: "vincent-gcc at vinc17 dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/91072] New: does not reduce the size of a division by a constant on non-negative int / small unsigned long constant
Date: Wed, 03 Jul 2019 13:54:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91072
Bug ID: 91072
Summary: does not reduce the size of a division by a constant
on non-negative int / small unsigned long constant
Product: gcc
Version: unknown
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Severity: normal
Priority: P3
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The generated division by a constant is suboptimal when its size could be
reduced, e.g. on non-negative int divided by a small unsigned long constant
(which fits in an int). Consider the following example (the i <= 0 condition is
just there to have a similar source, otherwise this could just be i < 0 when i
is signed).
int f1 (unsigned int i)
{
return i <= 0 ? 0 : i / 3UL;
}
int f2 (int i)
{
return i <= 0 ? 0 : i / 3UL;
}
int f3 (int i)
{
return i <= 0 ? 0 : i / 3L;
}
With GCC 8.3.0 on x86_64, using -O3, f1 and f3 both use a 32-bit multiplication
(mull / imull) by a 32-bit constant, but f2 uses a 64-bit multiplication (mulq)
by a 64-bit constant.
With gcc (Debian 20190628-1) 10.0.0 20190628 (experimental) [trunk revision
272790], the only change is that f1 and f2 both use imulq (but still with a
32-bit constant). Wouldn't this be slower?
On a 64-bit PowerPC, this is similar with GCC 8.3.1 (mulhwu for f1 and f3,
mulhdu for f2).
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Subject: [Bug c++/83374] [DR1813] Bad std::is_standard_layout with two base class subobjects of the same type
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |msebor at gcc dot gnu.org
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
*** Bug 91064 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-648139-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 03 14:05:39 2019
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/91064] __is_standard_layout incorrect for a class with multiple bases
Date: Wed, 03 Jul 2019 14:05:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91064
Martin Sebor <msebor at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Yes, it's a dupe.
*** This bug has been marked as a duplicate of bug 83374 ***
>From gcc-bugs-return-648141-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 03 14:09:02 2019
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From: "segher at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/91050] -mdejagnu-cpu=<cpu> does not affect the -m<cpu> assembler option
Date: Wed, 03 Jul 2019 14:09:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91050
Segher Boessenkool <segher at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #4 from Segher Boessenkool <segher at gcc dot gnu.org> ---
(In reply to Alan Modra from comment #3)
> We don't always emit .machine because that is a waste of time if the
> .machine cpu matches the original cpu passed on the command line to gas.
> .machine reloads the gas opcode table, which may take a significant time.
That is a legitimate concern, of course, but how bad is that? More and
more code uses .machine freely, in inline asm directly, or with function
attributes for example.
It would be a lot simpler for GCC to always use .machine.
Maybe gas should delay initialising these tables until it sees the first
actual insn?
Some of my configurations *always* use .machine, and I never noticed
any slowdown.
I'll benchmark something.
>From gcc-bugs-return-648142-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 03 14:14:08 2019
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From: "rwdougla at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/91073] New: if constexpr no longer works directly with Concepts
Date: Wed, 03 Jul 2019 14:14:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91073
Bug ID: 91073
Summary: if constexpr no longer works directly with Concepts
Product: gcc
Version: 9.1.0
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It appears I can no longer use a Concept within the if-constexpr's expression.
I receive the error:
<source>:26:58: error: expected unqualified-id before ')' token
Compiler Explorer link: https://godbolt.org/z/r8TXSM
Assuming it is not due to an intended change in concepts for c++20, as Clang
appears to support it when compiled with concepts branch:
https://godbolt.org/z/4liykV
Workaround exists by assigning Concept evaluation to a constexpr bool and using
that in the if-constexpr check.
In case Compiler Explorer link is insufficient, here is gcc params:
Using:
gcc 9.1.0
flags: -std=c++2a -fconcepts -O2 -Wall -Wextra -Werror -Wpedantic -Wconversion
Code:
#include <iostream>
template<typename T, typename... Params>
concept HasInit = requires(T t, Params... p) { t.init(p...); };
struct Initable { void init(int) { std::cout << "In init" << std::endl; } };
struct Createable { void create(int) { std::cout << "In create" << std::endl; }
};
struct Foo{
template<typename CB>
void for_each(CB&& cb)
{
Initable i;
Createable c;
cb(i);
cb(c);
}
Foo()
{
struct Bar { int x; };
for_each(
[&](auto& foo){
// constexpr bool has_init = HasInit<decltype(foo), int>;
// if constexpr (has_init)
if constexpr (HasInit<decltype(foo), int>)
{
foo.init(5);
}
});
}
};
int main()
{
Foo f;
return 0;
}
>From gcc-bugs-return-648143-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 03 14:16:48 2019
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Subject: [Bug c++/83374] [DR1813] Bad std::is_standard_layout with two base class subobjects of the same type
Date: Wed, 03 Jul 2019 14:16:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|NEW |ASSIGNED
CC| |mpolacek at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |mpolacek at gcc dot gnu.org
--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Clang 7 and newer now implement DR 1813. I'll take a look.
>From gcc-bugs-return-648144-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 03 14:20:47 2019
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Subject: [Bug target/91050] -mdejagnu-cpu=<cpu> does not affect the -m<cpu> assembler option
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--- Comment #5 from Peter Bergner <bergner at gcc dot gnu.org> ---
(In reply to Alan Modra from comment #3)
> We don't always emit .machine because that is a waste of time if the
> .machine cpu matches the original cpu passed on the command line to gas.
> .machine reloads the gas opcode table, which may take a significant time.
Shouldn't we check whether the new .machine <cpu> is different than the
currently active cpu value before reloading the opcode table? I don't think it
would be too hard to do and would solve stupid user tricks like:
.machine power8
.machine power8
.machine power8
...
I'll have a look at that after I fix gcc sending the wrong -m<cpu> option to
gas. Which is independent question of whether gcc should always emit .machine
directives.
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From: "seurer at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/91074] New: [10 regression] c-c++-common/gomp/scan-3.c fails with ICE starting with r272958
Date: Wed, 03 Jul 2019 14:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91074
Bug ID: 91074
Summary: [10 regression] c-c++-common/gomp/scan-3.c fails with
ICE starting with r272958
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: seurer at gcc dot gnu.org
Target Milestone: ---
FAIL: c-c++-common/gomp/scan-3.c (internal compiler error)
FAIL: c-c++-common/gomp/scan-3.c (test for excess errors)
FAIL: c-c++-common/gomp/scan-3.c -std=c++98 (internal compiler error)
FAIL: c-c++-common/gomp/scan-3.c -std=c++98 (test for excess errors)
FAIL: c-c++-common/gomp/scan-3.c -std=c++14 (internal compiler error)
FAIL: c-c++-common/gomp/scan-3.c -std=c++14 (test for excess errors)
FAIL: c-c++-common/gomp/scan-3.c -std=c++17 (internal compiler error)
FAIL: c-c++-common/gomp/scan-3.c -std=c++17 (test for excess errors)
spawn -ignore SIGHUP /home/seurer/gcc/build/gcc-test2/gcc/xgcc
-B/home/seurer/gcc/build/gcc-test2/gcc/
/home/seurer/gcc/gcc-test2/gcc/testsuite/c-c++-common/gomp/scan-3.c
-fno-diagnostics-show-caret -fno-diagnostics-show-line-numbers
-fdiagnostics-color=never -fopenmp -Wno-hsa -S -o scan-3.s
during RTL pass: expand
/home/seurer/gcc/gcc-test2/gcc/testsuite/c-c++-common/gomp/scan-3.c: In
function 'f1':
/home/seurer/gcc/gcc-test2/gcc/testsuite/c-c++-common/gomp/scan-3.c:4:1:
internal compiler error: tree check: expected ssa_name, have var_decl in
single_imm_use, at ssa-iterators.h:421
0x101cadc3 tree_check_failed(tree_node const*, char const*, int, char const*,
...)
/home/seurer/gcc/gcc-test2/gcc/tree.c:9900
0x10764b8f tree_check(tree_node const*, char const*, int, char const*,
tree_code)
/home/seurer/gcc/gcc-test2/gcc/tree.h:3473
0x10764b8f single_imm_use
/home/seurer/gcc/gcc-test2/gcc/ssa-iterators.h:421
0x10764b8f expand_mul_overflow
/home/seurer/gcc/gcc-test2/gcc/internal-fn.c:1590
0x107663a7 expand_arith_overflow
/home/seurer/gcc/gcc-test2/gcc/internal-fn.c:2362
0x107615af expand_internal_call(internal_fn, gcall*)
/home/seurer/gcc/gcc-test2/gcc/internal-fn.c:3573
0x107615af expand_internal_call(gcall*)
/home/seurer/gcc/gcc-test2/gcc/internal-fn.c:3581
0x1041c397 expand_call_stmt
/home/seurer/gcc/gcc-test2/gcc/cfgexpand.c:2638
0x1041c397 expand_gimple_stmt_1
/home/seurer/gcc/gcc-test2/gcc/cfgexpand.c:3708
0x1041dfdf expand_gimple_stmt
/home/seurer/gcc/gcc-test2/gcc/cfgexpand.c:3867
0x104254e7 expand_gimple_basic_block
/home/seurer/gcc/gcc-test2/gcc/cfgexpand.c:5907
0x104286c7 execute
/home/seurer/gcc/gcc-test2/gcc/cfgexpand.c:6530
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Subject: [Bug tree-optimization/91074] [10 regression] c-c++-common/gomp/scan-3.c fails with ICE starting with r272958
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seurer at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |powerpc64*-unknown-linux-gn
| |u
CC| |jakub at gcc dot gnu.org
Host| |powerpc64*-unknown-linux-gn
| |u
Build| |powerpc64*-unknown-linux-gn
| |u
--- Comment #1 from seurer at gcc dot gnu.org ---
Also apparent scan-5.c. From a powerpc BE system:
> FAIL: c-c++-common/gomp/scan-3.c -std=c++14 (internal compiler error)
> FAIL: c-c++-common/gomp/scan-3.c -std=c++14 (test for excess errors)
> FAIL: c-c++-common/gomp/scan-3.c -std=c++17 (internal compiler error)
> FAIL: c-c++-common/gomp/scan-3.c -std=c++17 (test for excess errors)
> FAIL: c-c++-common/gomp/scan-3.c -std=c++98 (internal compiler error)
> FAIL: c-c++-common/gomp/scan-3.c -std=c++98 (test for excess errors)
> FAIL: c-c++-common/gomp/scan-3.c (internal compiler error)
> FAIL: c-c++-common/gomp/scan-3.c (test for excess errors)
> FAIL: c-c++-common/gomp/scan-5.c -std=c++14 (internal compiler error)
> FAIL: c-c++-common/gomp/scan-5.c -std=c++14 (test for excess errors)
> FAIL: c-c++-common/gomp/scan-5.c -std=c++17 (internal compiler error)
> FAIL: c-c++-common/gomp/scan-5.c -std=c++17 (test for excess errors)
> FAIL: c-c++-common/gomp/scan-5.c -std=c++98 (internal compiler error)
> FAIL: c-c++-common/gomp/scan-5.c -std=c++98 (test for excess errors)
> FAIL: c-c++-common/gomp/scan-5.c (internal compiler error)
> FAIL: c-c++-common/gomp/scan-5.c (test for excess errors)
>From gcc-bugs-return-648147-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 03 15:04:44 2019
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Subject: [Bug tree-optimization/91074] [10 regression] c-c++-common/gomp/scan-3.c fails with ICE starting with r272958
Date: Wed, 03 Jul 2019 15:04:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2019-07-03
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 46554
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46554&action=edit
gcc10-pr91074.patch
Untested fix.
>From gcc-bugs-return-648148-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 03 15:24:32 2019
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From: "andrey.vihrov at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/91075] New: Wrong code generated for static variable with local redeclaration
Date: Wed, 03 Jul 2019 15:24:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91075
Bug ID: 91075
Summary: Wrong code generated for static variable with local
redeclaration
Product: gcc
Version: 9.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: andrey.vihrov at gmail dot com
Target Milestone: ---
Consider the following C++ sample:
static int x;
int main()
{
int x = 1;
{
extern int x;
return x;
}
}
Compiling the above code with "g++ test.cpp" gives:
/usr/bin/ld: /tmp/ccZhQ3uF.o: in function `main':
test.cpp:(.text+0x6): undefined reference to `x'
collect2: error: ld returned 1 exit status
Removing the first "int x;" declaration from main() fixes the problem.
According to Note 3.3.2.11 of [1], the local "extern int x;" declaration should
refer to the static variable from the global namespace.
The problem is reproducible with GCC 9.1.0 and all GCC versions / targets
available on gcc.godbolt.org, while clang and other compilers produce correct
code.
[1] http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2014/n4296.pdf
>From gcc-bugs-return-648149-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 03 18:39:41 2019
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Subject: [Bug c++/80785] warning for static definitions inside extern "C"
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Severity|normal |enhancement
>From gcc-bugs-return-648150-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 03 18:41:14 2019
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Subject: [Bug tree-optimization/91074] [10 regression] c-c++-common/gomp/scan-3.c fails with ICE starting with r272958
Date: Wed, 03 Jul 2019 18:41:00 -0000
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--- Comment #3 from seurer at gcc dot gnu.org ---
I am running a check on the test and ...
looks like it works! Problem test cases fixed and no other new issues.
>From gcc-bugs-return-648151-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 03 19:50:56 2019
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Subject: [Bug target/91050] -mdejagnu-cpu=<cpu> does not affect the -m<cpu> assembler option
Date: Wed, 03 Jul 2019 19:50:00 -0000
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--- Comment #6 from Peter Bergner <bergner at gcc dot gnu.org> ---
(In reply to Peter Bergner from comment #5)
> Shouldn't we check whether the new .machine <cpu> is different than the
> currently active cpu value before reloading the opcode table? I don't think
> it would be too hard to do and would solve stupid user tricks like:
Actually, gas' ppc_machine() already ignores .machine directives if it matches
the currently active cpu, so no code needed. That means we'll never reload the
opcode table unless we really have to.
>From gcc-bugs-return-648152-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 03 19:51:14 2019
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Subject: [Bug libfortran/91030] Poor performance of I/O -fconvert=big-endian
Date: Wed, 03 Jul 2019 19:51:00 -0000
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--- Comment #26 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Jerry, you are working on a Linux box, right? What does
stat -f -c %b .
tell you?
>From gcc-bugs-return-648153-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 03 19:51:28 2019
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From: "dushistov at mail dot ru" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80635] std::optional and bogus -Wmaybe-uninitialized warning
Date: Wed, 03 Jul 2019 19:51:00 -0000
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Evgeniy Dushistov <dushistov at mail dot ru> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |dushistov at mail dot ru
--- Comment #19 from Evgeniy Dushistov <dushistov at mail dot ru> ---
I saw problem similar `std::optional` may be unitialized case as desribed here
with boost::variant/boost::optional (c++11) and std::variant/std::optional
(c++17),
but in my case I have not only gcc warning, but valgrind also reports problem,
is it the same problem or gcc code generation bug?
```
//Foo.cpp
#include "Foo.hpp"
struct FooOpaque {};
FooOpaque *Foo_new() {
auto p = new FooOpaque;
return p;
}
void Foo_free(FooOpaque *p) { delete p; }
std::variant<std::optional<Foo>, std::string> f_res_opt(int var) {
switch (var) {
case 0:
return {std::optional<Foo>{Foo{Foo_new()}}};
case 1:
return {std::optional<Foo>{}};
case 2:
return {std::string{}};
default:
std::abort();
}
}
```
```
//Foo.hpp
#include <memory>
#include <optional>
#include <variant>
struct FooOpaque;
FooOpaque *Foo_new();
void Foo_free(FooOpaque *);
struct FooDeleter {
void operator()(FooOpaque *p) { Foo_free(p); }
};
using Foo = std::unique_ptr<FooOpaque, FooDeleter>;
std::variant<std::optional<Foo>, std::string> f_res_opt(int var);
```
```
//main.cpp
#include "Foo.hpp"
int main() {
auto res1 = f_res_opt(0);
auto res1_ok = std::get<std::optional<Foo>>(std::move(res1));
printf("step 2\n");
auto res2 = f_res_opt(1);
auto res2_ok = std::get<std::optional<Foo>>(std::move(res2));
printf("step 3\n");
auto res3 = f_res_opt(2);
auto res3_ok = std::get<std::string>(std::move(res3));
}
```
gcc reports:
```
g++ -ggdb -Ofast -Wall -Wextra -std=c++17 -pedantic main.cpp Foo.cpp
In file included from main.cpp:1:
Foo.hpp: In function 'int main()':
Foo.hpp:10:43: warning: 'res2_ok.std::_Head_base<0, FooOpaque*,
false>::_M_head_impl' may be used uninitialized in this function
[-Wmaybe-uninitialized]
10 | void operator()(FooOpaque *p) { Foo_free(p); }
| ~~~~~~~~^~~
main.cpp:12:8: note: 'res2_ok.std::_Head_base<0, FooOpaque*,
false>::_M_head_impl' was declared here
12 | auto res2_ok = std::get<std::optional<Foo>>(std::move(res2));
| ^~~~~~~
In file included from main.cpp:1:
Foo.hpp:10:43: warning: 'res1_ok.std::_Head_base<0, FooOpaque*,
false>::_M_head_impl' may be used uninitialized in this function
[-Wmaybe-uninitialized]
10 | void operator()(FooOpaque *p) { Foo_free(p); }
| ~~~~~~~~^~~
main.cpp:6:8: note: 'res1_ok.std::_Head_base<0, FooOpaque*,
false>::_M_head_impl' was declared here
6 | auto res1_ok = std::get<std::optional<Foo>>(std::move(res1));
| ^~~~~~~
```
but valgrind also reports:
valgrind -v ./a.out
```
==7858== Conditional jump or move depends on uninitialised value(s)
==7858== at 0x109374: ~unique_ptr (unique_ptr.h:288)
==7858== by 0x109374: _M_destroy (optional:257)
==7858== by 0x109374: _M_reset (optional:277)
==7858== by 0x109374: ~_Optional_payload (optional:398)
==7858== by 0x109374: ~_Optional_base (optional:471)
==7858== by 0x109374: ~optional (optional:656)
==7858== by 0x109374: main (main.cpp:12)
```
gcc 9.1.0 and valgrind 3.15.0.GIT
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Subject: [Bug c++/80635] std::optional and bogus -Wmaybe-uninitialized warning
Date: Wed, 03 Jul 2019 19:54:00 -0000
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--- Comment #20 from Evgeniy Dushistov <dushistov at mail dot ru> ---
Also if add one line to code `printf("test\n");`
```
struct FooDeleter {
void operator()(FooOpaque *p) {
printf("test\n");
Foo_free(p);
}
};
```
gcc don't report any warning,
and valgrind also can not find any errors.
>From gcc-bugs-return-648155-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 03 19:55:12 2019
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Subject: [Bug c++/91076] New: wrong class-key in mentioned in a diagnostic note
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Bug ID: 91076
Summary: wrong class-key in mentioned in a diagnostic note
Product: gcc
Version: 9.0
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Priority: P3
Component: c++
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When a type defined with one class-key (such as "class") contains a member such
as a pointer to the same type that uses a different class-key (such as
"struct") the C++ front-end replaces the original class-key associated with the
type with the one used in the member. This causes problems in GCC code that
examines the class-key by using CLASSTYPE_DECLARED_CLASS (t) or by calling
class_key_or_enum_as_string (). A test case illustrating this bug is as
follows:
$ cat a.C && gcc -S -Wall -Wextra a.C
class A // uses CLASS
{
public:
struct A *p; // uses STRUCT
}
[[maybe_unused]]; // misleading warning refers to STRUCT
a.C:6:1: warning: attribute ignored in declaration of ‘struct A’ [-Wattributes]
6 | [[maybe_unused]]; // misleading warning refers to STRUCT
| ^
a.C:6:1: note: attribute for ‘struct A’ must follow the ‘struct’ keyword
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Subject: [Bug fortran/91077] [8/9/10 Regression] Wrong indexing when using a pointer
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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>From gcc-bugs-return-648156-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 03 20:11:06 2019
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Subject: [Bug fortran/91077] New: [8/9/10 Regression] Wrong indexing when using a pointer
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Bug ID: 91077
Summary: [8/9/10 Regression] Wrong indexing when using a
pointer
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From a c.l.f. post by ygalklein@gmail.com (slightly modified):
program test
implicit none
integer, parameter :: length = 9
real(8), dimension(2) :: a, b
integer :: i
type point
real(8) :: x
end type point
type stored
type(point), dimension(:), allocatable :: np
end type stored
type(stored), dimension(:), pointer :: std =>null()
allocate(std(1))
allocate(std(1)%np(length))
std(1)%np(1)%x = 0.3d0
std(1)%np(2)%x = 0.3555d0
std(1)%np(3)%x = 0.26782d0
std(1)%np(4)%x = 0d0
std(1)%np(5)%x = 1.555d0
std(1)%np(6)%x = 7.3d0
std(1)%np(7)%x = 7.8d0
std(1)%np(8)%x = 6.3d0
std(1)%np(9)%x = 5.5d0
do i = 1, 2
write(*, "('std(1)%np(',i1,')%x = ',1e22.14)") i, std(1)%np(i)%x
end do
do i = 1, 2
write(*, "('std(1)%np(1:',i1,') = ',9e22.14)") i, std(1)%np(1:i)%x
end do
a = std(1)%np(1:2)%x
b = [std(1)%np(1)%x, std(1)%np(2)%x]
print *,a
print *,b
if (norm2(a - b) .gt. 1d-3) then
write(*,*) 'failure'
else
write(*, *) 'success'
end if
end program test
yields
std(1)%np(1)%x = 0.30000000000000E+00
std(1)%np(2)%x = 0.35550000000000E+00
std(1)%np(1:1) = 0.30000000000000E+00
std(1)%np(1:2) = 0.30000000000000E+00 0.55000000000000E+01
0.29999999999999999 5.5000000000000000
0.29999999999999999 0.35549999999999998
failure
with gcc-8, gcc-9 and current trunk.
Something is rotten in the state of Denmark here.
>From gcc-bugs-return-648158-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 03 20:13:28 2019
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Subject: [Bug c++/91064] __is_standard_layout incorrect for a class with multiple bases
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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CC| |mpolacek at gcc dot gnu.org
--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Note the testcase here is actually wrong; U *is* a standard-layout class. The
standard has a different test.
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Subject: [Bug fortran/91077] [8/9/10 Regression] Wrong indexing when using a pointer
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Keywords| |wrong-code
--- Comment #1 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Note that this works when the variable std is changed to an
allocatable.
>From gcc-bugs-return-648160-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 03 20:26:22 2019
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Subject: [Bug libstdc++/90409] std::move[_backward] could be more optimized for deque iterators
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François Dumont <fdumont at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
CC| |fdumont at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |fdumont at gcc dot gnu.org
--- Comment #1 from François Dumont <fdumont at gcc dot gnu.org> ---
Patch awaiting on mailing list:
https://gcc.gnu.org/ml/libstdc++/2019-06/msg00097.html
>From gcc-bugs-return-648161-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 03 20:53:01 2019
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Subject: [Bug c++/91076] wrong class-key in mentioned in a diagnostic note
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2019-07-03
Assignee|unassigned at gcc dot gnu.org |msebor at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
I'm testing (what I'm hoping will stay) a simple patch.
>From gcc-bugs-return-648162-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 03 21:04:02 2019
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Subject: [Bug c++/91064] __is_standard_layout incorrect for a class with multiple bases
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91064
--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
Yes, my example in comment #0 is missing the derivation from Q. So the
sentence
has at most one base class subobject of any given type
doesn't mean that a std layout class cannot have multiple base class
subobjects, just that none of them can be of a type that's derived, either
directly or indirectly, from the same base class. Okay, thanks.
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Subject: [Bug libstdc++/91067] [9/10 Regression] Clang compiler can't link executable if std::filesystem::directory_iterator is encountered
Date: Wed, 03 Jul 2019 21:07:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91067
--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Wed Jul 3 21:06:25 2019
New Revision: 273023
URL: https://gcc.gnu.org/viewcvs?rev=273023&root=gcc&view=rev
Log:
PR libstdc++/91067 fix missing exports for filesystem iterators
The copy assignment operator for recursive_directory_iterator was not
exported despite being needed. The __shared_ptr default constructors are
not needed when compiling with GCC but Clang requires them for -O1.
PR libstdc++/91067
* acinclude.m4 (libtool_VERSION): Bump to 6:27:0.
* configure: Regenerate.
* config/abi/pre/gnu.ver (GLIBCXX_3.4.27): Add new version. Export
missing symbols.
* testsuite/27_io/filesystem/iterators/91067.cc: New test.
* testsuite/util/testsuite_abi.cc: Add new symbol version.
Added:
trunk/libstdc++-v3/testsuite/27_io/filesystem/iterators/91067.cc
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/acinclude.m4
trunk/libstdc++-v3/config/abi/pre/gnu.ver
trunk/libstdc++-v3/configure
trunk/libstdc++-v3/testsuite/util/testsuite_abi.cc
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Subject: [Bug libstdc++/91067] [9/10 Regression] Clang compiler can't link executable if std::filesystem::directory_iterator is encountered
Date: Wed, 03 Jul 2019 21:09:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91067
--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Wed Jul 3 21:09:13 2019
New Revision: 273025
URL: https://gcc.gnu.org/viewcvs?rev=273025&root=gcc&view=rev
Log:
PR libstdc++/91067 fix missing exports for filesystem iterators
The copy assignment operator for recursive_directory_iterator was not
exported despite being needed. The __shared_ptr default constructors are
not needed when compiling with GCC but Clang requires them for -O1.
PR libstdc++/91067
* acinclude.m4 (libtool_VERSION): Bump to 6:27:0.
* configure: Regenerate.
* config/abi/pre/gnu.ver (GLIBCXX_3.4.27): Add new version. Export
missing symbols.
* testsuite/27_io/filesystem/iterators/91067.cc: New test.
* testsuite/util/testsuite_abi.cc: Add new symbol version.
Added:
branches/gcc-9-branch/libstdc++-v3/testsuite/27_io/filesystem/iterators/91067.cc
Modified:
branches/gcc-9-branch/libstdc++-v3/ChangeLog
branches/gcc-9-branch/libstdc++-v3/acinclude.m4
branches/gcc-9-branch/libstdc++-v3/config/abi/pre/gnu.ver
branches/gcc-9-branch/libstdc++-v3/configure
branches/gcc-9-branch/libstdc++-v3/testsuite/util/testsuite_abi.cc
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Subject: [Bug libstdc++/91067] [9/10 Regression] Clang compiler can't link executable if std::filesystem::directory_iterator is encountered
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #9 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Fixed on trunk and for GCC 9.2, thanks for finding and reporting the bug!
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/91073] [9/10 Regression] if constexpr no longer works directly with Concepts
Date: Wed, 03 Jul 2019 21:22:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Known to work| |8.3.0
Keywords| |rejects-valid
Last reconfirmed| |2019-07-03
CC| |paolo at gcc dot gnu.org
Ever confirmed|0 |1
Summary|if constexpr no longer |[9/10 Regression] if
|works directly with |constexpr no longer works
|Concepts |directly with Concepts
Known to fail| |10.0, 9.1.0
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Confirmed as a regression (GCC 8 accepts it, if 'concept HasInit' is replaced
with 'concept bool HasInit'). It started to be rejected with r260482:
PR c++/84588
* parser.c (cp_parser_maybe_commit_to_declaration,
cp_parser_check_condition_declarator): New.
(cp_parser_simple_declaration): Use the first above.
(cp_parser_condition): Use both the above; enforce
[stmt.stmt]/2 about the declarator not specifying
a function or an array; improve error-recovery.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug lto/91078] New: [10 regression] All LTO tests FAIL: SIGBUS in lto1 (lto_file_finalize)
Date: Wed, 03 Jul 2019 21:34:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91078
Bug ID: 91078
Summary: [10 regression] All LTO tests FAIL: SIGBUS in lto1
(lto_file_finalize)
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: lto
Assignee: unassigned at gcc dot gnu.org
Reporter: ro at gcc dot gnu.org
CC: marxin at gcc dot gnu.org
Target Milestone: ---
Host: sparc-sun-solaris2.11
Target: sparc-sun-solaris2.11
Build: sparc-sun-solaris2.11
Between 20190702 (r272944) and 20190703 (r273009), all LTO tests started to
FAIL
on Solaris/SPARC. It boils down to
$ cat /var/tmp//ccqNGG1b
20010124-1.o
20010124-1-lib.o
main.o
$ lto1 -quiet @/var/tmp//ccqNGG1b -o 20010124-1.s
[...]
lto1: internal compiler error: Bus Error
0x9d1597 crash_signal
/vol/gcc/src/hg/trunk/local/gcc/toplev.c:326
0x3fea74 lto_file_finalize
/vol/gcc/src/hg/trunk/local/gcc/lto/lto-common.c:2202
0x3fea74 lto_create_files_from_ids
/vol/gcc/src/hg/trunk/local/gcc/lto/lto-common.c:2225
0x3fea74 lto_file_read
/vol/gcc/src/hg/trunk/local/gcc/lto/lto-common.c:2279
0x3fea74 read_cgraph_and_symbols(unsigned int, char const**)
/vol/gcc/src/hg/trunk/local/gcc/lto/lto-common.c:2731
0x3dd10b lto_main()
/vol/gcc/src/hg/trunk/local/gcc/lto/lto.c:616
Thread 2 received signal SIGSEGV, Segmentation fault.
[Switching to Thread 1 (LWP 1)]
lto_file_finalize (file=0x16a6370, file_data=0xfa886050)
at /vol/gcc/src/hg/trunk/local/gcc/lto/lto-common.c:2202
2202 file_data->lto_section_header = *(const lto_section *)data;
(gdb) where
#0 lto_file_finalize (file=0x16a6370, file_data=0xfa886050)
at /vol/gcc/src/hg/trunk/local/gcc/lto/lto-common.c:2202
#1 lto_create_files_from_ids (count=<synthetic pointer>,
file_data=0xfa886050, file=0x16a6370)
at /vol/gcc/src/hg/trunk/local/gcc/lto/lto-common.c:2225
#2 lto_file_read (count=<synthetic pointer>, resolution_file=0x0,
file=<optimized out>)
at /vol/gcc/src/hg/trunk/local/gcc/lto/lto-common.c:2279
#3 read_cgraph_and_symbols (nfiles=<optimized out>, fnames=<optimized out>)
at /vol/gcc/src/hg/trunk/local/gcc/lto/lto-common.c:2731
#4 0x003dd10c in lto_main () at /vol/gcc/src/hg/trunk/local/gcc/lto/lto.c:616
#5 0x009d1610 in compile_file ()
at /vol/gcc/src/hg/trunk/local/gcc/toplev.c:456
#6 0x009d4128 in do_compile ()
at /vol/gcc/src/hg/trunk/local/gcc/toplev.c:2209
#7 toplev::main (this=0xffbfe4de, argc=<optimized out>, argv=<optimized out>)
at /vol/gcc/src/hg/trunk/local/gcc/toplev.c:2344
#8 0x012f11ac in main (argc=27, argv=0xffbfe544)
at /vol/gcc/src/hg/trunk/local/gcc/main.c:39
(gdb) p/x data
$1 = 0xfb9d8429
gdb showing this as SIGSEGV is a gdb bug.
This most likely affects all strict-alignment targets.
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Subject: [Bug lto/91078] [10 regression] All LTO tests FAIL: SIGBUS in lto1 (lto_file_finalize)
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Rainer Orth <ro at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |10.0
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Subject: [Bug fortran/91077] [8/9/10 Regression] Wrong indexing when using a pointer
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91077
Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-07-03
CC| |pault at gcc dot gnu.org
Known to work| |7.4.0
Ever confirmed|0 |1
Known to fail| |10.0, 8.3.0, 9.1.0
--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Likely revision r251949 (r251946 is OK, wrong code at r251980).
>From gcc-bugs-return-648170-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 03 22:06:33 2019
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From: "elowe at elowe dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/61577] [4.9.0] can't compile on hp-ux v3 ia64
Date: Wed, 03 Jul 2019 22:06:00 -0000
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--- Comment #25 from EML <elowe at elowe dot com> ---
I have applied the patch and tried your other suggestions, still the stage1
compiler has the same problems generating executables.
In analyzing the intermediate files between working (gcc 4.93) and not
(bootstrap 8.3), the intermediate files seem similar until the "mach" stage
The problem seems to be in out the compiler decides to reference a string in
the source.
My program is:
#include <stdio.h>
int main()
{
printf("Hellos World\n");
return 0;
}
The generated .s file for Working does this:
.LC0:
stringz "Hellos World"
<edited for breivity>
addl r36 = @ltoffx(.LC0), r1
;;
ld8.mov r36 = [r36], .LC0
The non-working .s file does this:
.LC0:
stringz "Hellos World"
<edited for breivity>
movl r36 = @gprel(.LC0)
;;
add r36 = r1, r36
If I replace those 3 lines and run the assembler+linker by hand - the
non-working foo.s will run correctly
>From gcc-bugs-return-648171-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 03 22:08:18 2019
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From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/91079] New: [DR 1881] Standard-layout classes and unnamed bit-fields
Date: Wed, 03 Jul 2019 22:08:00 -0000
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Bug ID: 91079
Summary: [DR 1881] Standard-layout classes and unnamed
bit-fields
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Cf. https://wg21.link/cwg1881
Test:
struct A { int a : 4; };
struct B : A { int b : 3; };
static_assert(__is_standard_layout(A), "");
static_assert(!__is_standard_layout(B), "");
struct C { int : 0; };
struct D : C { int : 0; };
static_assert(__is_standard_layout(C), "");
static_assert(!__is_standard_layout(D), "");
>From gcc-bugs-return-648172-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 03 22:11:18 2019
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Subject: [Bug c++/91080] New: [DR 1672] Layout compatibility with multiple empty bases
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Bug ID: 91080
Summary: [DR 1672] Layout compatibility with multiple empty
bases
Product: gcc
Version: 10.0
Status: UNCONFIRMED
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Cf. https://wg21.link/cwg1672
Test (from the clang testsuite):
struct Empty {};
struct A : Empty {};
struct B { Empty e; };
struct C : A { B b; int n; };
struct D : A { int n; B b; };
static_assert(!__is_standard_layout(C), "");
static_assert(__is_standard_layout(D), "");
struct E { B b; int n; };
struct F { int n; B b; };
union G { B b; int n; };
union H { int n; B b; };
struct X {};
template<typename T> struct Y : X, A { T t; };
static_assert(!__is_standard_layout(Y<E>), "");
static_assert(__is_standard_layout(Y<F>), "");
static_assert(!__is_standard_layout(Y<G>), "");
static_assert(!__is_standard_layout(Y<H>), "");
static_assert(!__is_standard_layout(Y<X>), "");
>From gcc-bugs-return-648173-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 03 22:12:52 2019
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Subject: [Bug c++/91081] New: [DR 2120] Array as first non-static data member in standard-layout class
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Cf. https://wg21.link/cwg2120
Test:
struct A {};
struct B : A {};
struct C { A a; };
struct D { C c[5]; };
struct E : B { D d; };
static_assert(__is_standard_layout(B), "");
static_assert(__is_standard_layout(D), "");
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>From gcc-bugs-return-648174-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 03 22:26:46 2019
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Subject: [Bug c++/83374] [DR1813] Bad std::is_standard_layout with two base class subobjects of the same type
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |accepts-invalid, patch,
| |rejects-valid
--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
https://gcc.gnu.org/ml/gcc-patches/2019-07/msg00304.html
>From gcc-bugs-return-648175-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 03 23:03:43 2019
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Subject: [Bug target/91050] -mdejagnu-cpu=<cpu> does not affect the -m<cpu> assembler option
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--- Comment #7 from Alan Modra <amodra at gmail dot com> ---
Huh, I'd forgotten that gas only reloads the opcode table when the cpu changes.
Be aware that .machine isn't a complete solution as it doesn't fix a wrong gas
command line for "gcc -c asm.S". You can't insert .machine in that case!
>From gcc-bugs-return-648176-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 03 23:10:14 2019
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From: "dave.anglin at bell dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/61577] [4.9.0] can't compile on hp-ux v3 ia64
Date: Wed, 03 Jul 2019 23:10:00 -0000
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--- Comment #26 from dave.anglin at bell dot net ---
On 2019-07-03 6:06 p.m., elowe at elowe dot com wrote:
> If I replace those 3 lines and run the assembler+linker by hand - the
> non-working foo.s will run correctly
So, HAVE_AS_LTOFFX_LDXMOV_RELOCS is probably not defined. The configure script
is
likely not detecting this assembler capability correctly.
Are you using bash shell? If not, I suggest that you use it instead of HP
shell.
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Subject: [Bug target/61577] [4.9.0] can't compile on hp-ux v3 ia64
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--- Comment #27 from The Written Word <bugzilla-gcc at thewrittenword dot com> ---
(In reply to dave.anglin from comment #26)
> On 2019-07-03 6:06 p.m., elowe at elowe dot com wrote:
> > If I replace those 3 lines and run the assembler+linker by hand - the
> > non-working foo.s will run correctly
> So, HAVE_AS_LTOFFX_LDXMOV_RELOCS is probably not defined. The configure
> script is
> likely not detecting this assembler capability correctly.
>
> Are you using bash shell? If not, I suggest that you use it instead of HP
> shell.
It's set to 1 for us. We're getting a segfault while building libstdc++-v3 with
8.3.0:
configure:7964: checking for ANSI C header files
configure:7984: /opt/build/china/gcc-8.3.0/.obj/./gcc/xgcc
-B/opt/build/china/gcc-8.3.0/.obj/./gcc/
-B/opt/build/gcc8/ia64-hp-hpux11.31/bin/
-B/opt/build/gcc8/ia64-hp-hpux11.31/lib/ -isystem
/opt/build/gcc8/ia64-hp-hpux11.31/include -isystem
/opt/build/gcc8/ia64-hp-hpux11.31/sys-include -c -O2 -g conftest.c >&5
configure:7984: $? = 0
configure:8057: /opt/build/china/gcc-8.3.0/.obj/./gcc/xgcc
-B/opt/build/china/gcc-8.3.0/.obj/./gcc/
-B/opt/build/gcc8/ia64-hp-hpux11.31/bin/ -B/opt/build/gcc8/i
a64-hp-hpux11.31/lib/ -isystem /opt/build/gcc8/ia64-hp-hpux11.31/include
-isystem /opt/build/gcc8/ia64-hp-hpux11.31/sys-include -o conftest -O2 -g
conftest.c >&5
configure:8057: $? = 0
configure:8057: ./conftest
/opt/build/china/gcc-8.3.0/libstdc++-v3/configure[20]: 1572 Memoryfault(coredum
p)
configure:8057: $? = 139
Using the stage 1 8.3.0 compiler, we can get a simple "hello world" program to
compile.
>From gcc-bugs-return-648178-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 03 23:23:03 2019
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Subject: [Bug middle-end/90773] Improve piecewise operation
Date: Wed, 03 Jul 2019 23:23:00 -0000
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Jeffrey A. Law <law at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |law at redhat dot com
--- Comment #4 from Jeffrey A. Law <law at redhat dot com> ---
But isn't -Os a better choice if we care about this? It gives more compact
code. I guess I'm just not sure optimizing this using an overlapping store is
all that important.
>From gcc-bugs-return-648179-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jul 04 00:07:08 2019
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Subject: [Bug target/61577] [4.9.0] can't compile on hp-ux v3 ia64
Date: Thu, 04 Jul 2019 00:07:00 -0000
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--- Comment #28 from The Written Word <bugzilla-gcc at thewrittenword dot com> ---
(In reply to EML from comment #17)
> Note that in certain cases, the MPFR library won't build depending on the
> CFLAGS used (in particular the default -g -O2), this is due to problems with
> thread local storage. You can work around this by configuring MPFR with
> --disable-thread-safe
We are building GCC against mpfr-3.1.6 but MPFR wasn't a difficult build on
HP-UX/IA. We are building with the HP C compiler though. The MPFR testsuite
passed all but one test which was a PASS. And, ./configure shows
-DMPFR_USE_THREAD_SAFE=1.
>From gcc-bugs-return-648180-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jul 04 00:11:30 2019
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Subject: [Bug target/61577] [4.9.0] can't compile on hp-ux v3 ia64
Date: Thu, 04 Jul 2019 00:11:00 -0000
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--- Comment #29 from dave.anglin at bell dot net ---
On 2019-07-03 7:20 p.m., bugzilla-gcc at thewrittenword dot com wrote:
> configure:8057: /opt/build/china/gcc-8.3.0/.obj/./gcc/xgcc
> -B/opt/build/china/gcc-8.3.0/.obj/./gcc/
> -B/opt/build/gcc8/ia64-hp-hpux11.31/bin/ -B/opt/build/gcc8/i
> a64-hp-hpux11.31/lib/ -isystem /opt/build/gcc8/ia64-hp-hpux11.31/include
> -isystem /opt/build/gcc8/ia64-hp-hpux11.31/sys-include -o conftest -O2 -g
> conftest.c >&5
> configure:8057: $? = 0
> configure:8057: ./conftest
> /opt/build/china/gcc-8.3.0/libstdc++-v3/configure[20]: 1572 Memoryfault(coredum
> p)
The configure test needs to be debugged in the same manner as the "hello world"
program.
>From gcc-bugs-return-648181-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jul 04 00:13:41 2019
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Subject: [Bug target/61577] [4.9.0] can't compile on hp-ux v3 ia64
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--- Comment #30 from The Written Word <bugzilla-gcc at thewrittenword dot com> ---
(In reply to dave.anglin from comment #29)
> On 2019-07-03 7:20 p.m., bugzilla-gcc at thewrittenword dot com wrote:
> > configure:8057: /opt/build/china/gcc-8.3.0/.obj/./gcc/xgcc
> > -B/opt/build/china/gcc-8.3.0/.obj/./gcc/
> > -B/opt/build/gcc8/ia64-hp-hpux11.31/bin/ -B/opt/build/gcc8/i
> > a64-hp-hpux11.31/lib/ -isystem /opt/build/gcc8/ia64-hp-hpux11.31/include
> > -isystem /opt/build/gcc8/ia64-hp-hpux11.31/sys-include -o conftest -O2 -g
> > conftest.c >&5
> > configure:8057: $? = 0
> > configure:8057: ./conftest
> > /opt/build/china/gcc-8.3.0/libstdc++-v3/configure[20]: 1572 Memoryfault(coredum
> > p)
>
> The configure test needs to be debugged in the same manner as the "hello
> world" program.
Yeah, we've already looked at the difference between 4.9.4/8.3.0 assembly but
want to rebuild 8.3.0 with as few patches as possible to ensure the issue isn't
some patch we've introduced.
>From gcc-bugs-return-648182-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jul 04 00:30:48 2019
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Subject: [Bug libfortran/91030] Poor performance of I/O -fconvert=big-endian
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--- Comment #27 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
(In reply to Thomas Koenig from comment #26)
> Jerry, you are working on a Linux box, right? What does
>
> stat -f -c %b .
>
> tell you?
13429330
Ryzen 2500U with M.2 SSD
Fedora 30, Kernel 5.1.15-300.fc30.x86_64
>From gcc-bugs-return-648183-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jul 04 00:34:13 2019
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Subject: [Bug plugins/90924] lto-plugin/lto-plugin.c heap memory corruption due to insufficient sanitization.
Date: Thu, 04 Jul 2019 00:34:00 -0000
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--- Comment #5 from Ren Kimura <rkx1209dev at gmail dot com> ---
Yes. I can understand what you want to say. It may annoying for developers to
fix such nitpicky bugs.
But unfortunately these kind of bugs have been reported like, memory corruption
with *crafted* ELF file.
https://www.google.com/search?q=binutils+crafted+elf+cve
>From the perspective of attackers, they can prevent some kind of services by
sending crafted ELF file through network. i.e. Denial of Service.
Please consider our request of fixing.
Thanks
(In reply to Martin Liška from comment #4)
> (In reply to Ren Kimura from comment #3)
> > Hi. Sorry for late. I've just attached more simple one.
> >
> > PoC file for this bug can be created easily, just generating ELF file and
> > edit e_shstrndx in ELF header file to 0.
> >
> > Attached one is built from simple Hello World program.
> >
> > #include <stdio.h>
> > int main() {
> > printf("Hello World\n");
> > };
> >
> > gcc -o memcorrupt_nm-2.30_gcc-9.1.0_gold_simple hello_world.c
> >
> > Edit e_shtrndx (offset 0x3E) to 0.
>
> What sense does it make to create a valid ELF container and then corrupt it?
> It's expected that various tools will crash then.
>From gcc-bugs-return-648184-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jul 04 01:08:40 2019
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Subject: [Bug target/61577] [4.9.0] can't compile on hp-ux v3 ia64
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--- Comment #31 from EML <elowe at elowe dot com> ---
(In reply to dave.anglin from comment #26)
> On 2019-07-03 6:06 p.m., elowe at elowe dot com wrote:
> > If I replace those 3 lines and run the assembler+linker by hand - the
> > non-working foo.s will run correctly
> So, HAVE_AS_LTOFFX_LDXMOV_RELOCS is probably not defined. The configure
> script is
> likely not detecting this assembler capability correctly.
>
> Are you using bash shell? If not, I suggest that you use it instead of HP
> shell.
This macro only seems to control whether you use ltoffx or ltoff.
I can confirm I am using bash, and #define HAVE_AS_LTOFFX_LDXMOV_RELOCS 1 in
gcc/config.h
I also added in an #error to the code to make sure. It is definitely set.
>From gcc-bugs-return-648185-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jul 04 04:17:09 2019
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Subject: [Bug target/38629] target-specific parameters for inline heuristics not defined for AVR
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--- Comment #11 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Federico Fissore from comment #8)
> I forgot to say: this result came out of avr-gcc 4.8.1 (packaged by Arduino:
> it's a 4.8.1 with two small patches applied [1]). It uses -Os optimization
> flag
>
> [1] https://github.com/arduino/toolchain-avr/tree/master/gcc-patches
This link no longer works
>From gcc-bugs-return-648186-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jul 04 04:32:20 2019
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Subject: [Bug other/59893] Use LTO for libgcc.a, libstdc++.a, etc
Date: Thu, 04 Jul 2019 04:32:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=77278
--- Comment #8 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #6)
> Confirmed. It was the original intent to allow this, esp. for libgfortran
> for example.
That's bug 77278
>From gcc-bugs-return-648187-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jul 04 04:36:39 2019
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Subject: [Bug debug/78685] -Og generates too many "<optimized out>"s
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |rsandifo at gcc dot gnu.org
--- Comment #17 from Eric Gallager <egallager at gcc dot gnu.org> ---
Richard Sandiford had a series of patches radically overhauling how -Og works
in general that might affect this bug:
https://gcc.gnu.org/ml/gcc-patches/2019-06/msg01392.html
cc-ing him so he can comment on if it does in fact affect this bug.
>From gcc-bugs-return-648188-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jul 04 04:49:58 2019
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Subject: [Bug rtl-optimization/90756] [7/8/9/10 Regression] g++ ICE in convert_move, at expr.c:218 on i686 and s390x
Date: Thu, 04 Jul 2019 04:49:00 -0000
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--- Comment #12 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Jul 4 04:49:22 2019
New Revision: 273036
URL: https://gcc.gnu.org/viewcvs?rev=273036&root=gcc&view=rev
Log:
PR rtl-optimization/90756
* explow.c (promote_ssa_mode): Always use TYPE_MODE, don't bypass it
for VECTOR_TYPE_P.
* gcc.dg/pr90756.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/pr90756.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/explow.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-648189-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jul 04 04:53:36 2019
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From: "david at doublewise dot net" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/91082] New: Reference to function binds to pointer to function when given a template specialization
Date: Thu, 04 Jul 2019 04:53:00 -0000
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Bug ID: 91082
Summary: Reference to function binds to pointer to function
when given a template specialization
Product: gcc
Version: 9.1.0
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In the following code, gcc accepts the code in `c`, but rejects the code in
`d`. I believe both should be rejected, because it is attempting to bind a
pointer to a reference.
template<typename>
void a();
void b();
void c() {
static_cast<void(&)()>(&a<void>);
}
void d() {
static_cast<void(&)()>(&b);
}
See it live: https://godbolt.org/z/zguy6D
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Subject: [Bug tree-optimization/91074] [10 regression] c-c++-common/gomp/scan-3.c fails with ICE starting with r272958
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Jul 4 04:54:52 2019
New Revision: 273037
URL: https://gcc.gnu.org/viewcvs?rev=273037&root=gcc&view=rev
Log:
PR tree-optimization/91074
* omp-low.c (lower_omp_for_scan): Set DECL_GIMPLE_REG_P on cplx
temporary.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/omp-low.c
>From gcc-bugs-return-648191-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jul 04 05:11:28 2019
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Subject: [Bug tree-optimization/91069] [10 Regression] Miscompare of 453.povray since r272843
Date: Thu, 04 Jul 2019 05:11:00 -0000
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--- Comment #11 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Jul 4 05:10:52 2019
New Revision: 273039
URL: https://gcc.gnu.org/viewcvs?rev=273039&root=gcc&view=rev
Log:
PR middle-end/91069
* gcc.dg/pr91069.c (v2df): Use 2 * sizeof (double) instead of
hardcoded 16 for better portability.
(v2di): Change from long vector to long long vector. Use
2 * sizeof (long long) instead of hardcoded 16.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/pr91069.c
>From gcc-bugs-return-648192-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jul 04 05:30:21 2019
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Subject: [Bug fortran/91077] [8/9/10 Regression] Wrong indexing when using a pointer
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Paul Thomas <pault at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Assignee|unassigned at gcc dot gnu.org |pault at gcc dot gnu.org
--- Comment #3 from Paul Thomas <pault at gcc dot gnu.org> ---
Since I am the guilty party, I had better take it :-)
Cheers
Paul
>From gcc-bugs-return-648193-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jul 04 06:38:05 2019
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug lto/91078] [10 regression] All LTO tests FAIL: SIGBUS in lto1 (lto_file_finalize)
Date: Thu, 04 Jul 2019 06:38:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2019-07-04
Assignee|unassigned at gcc dot gnu.org |marxin at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
That's definitely mine, started with r272995.
>From gcc-bugs-return-648194-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jul 04 06:44:12 2019
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Subject: Re: Complaint about webpage
To: Tara Hamilton <tarahamilton879@gmail.com>, gcc-bugs@gcc.gnu.org, gcc-gnats@gcc.gnu.org, gcc-help@gcc.gnu.org
Newsgroups: gmane.comp.gcc.bugs,gmane.comp.gcc.help
References: <CANp=m1XqEGY+0hpm4fGXM=zgnBmvxpcNR5QUASrbRwBS-zqKoA@mail.gmail.com>
From: Jim Wilson <jimw@sifive.com>
Message-ID: <65eb62e6-1f06-9b36-5bab-17933bc52ea5@sifive.com>
Date: Thu, 04 Jul 2019 06:44:00 -0000
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On 7/3/19 8:02 PM, Tara Hamilton wrote:
> I’ve just been looking at your website and I came across this webpage:
> >deleted<
>
> Unfortunately, when I click the link ‘
> >deleted<,’ it redirects me to a payday
> loan site.
If you check the internet way back machine, you can see that the URL is
actually correct given the time and date of the post.
>deleted<
I don't think we provide a way to edit old posts, and it doesn't appear
to be a malicious site, so I don't see a real need to fix it. We aren't
the only ones with links back to cuj.com. In general, editing all old
links when domain names are sold and rebought is an intractable problem.
We do maintain the documentation links though.
Jim
^ permalink raw reply [flat|nested] only message in thread
only message in thread, other threads:[~2019-07-03 12:28 UTC | newest]
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[not found] <bug-91071-4@http.gcc.gnu.org/bugzilla/>
2019-07-03 12:28 ` [Bug tree-optimization/91071] [10 Regression] Miscompare of 410.bwaves since r272644 marxin at gcc dot gnu.org
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