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* [Bug fortran/86417] [9 Regression] FAIL: libgomp.fortran/alloc-comp-3.f90 -O0 (test for excess errors)
[not found] <bug-86417-4@http.gcc.gnu.org/bugzilla/>
@ 2018-07-06 11:19 ` ebotcazou at gcc dot gnu.org
0 siblings, 0 replies; only message in thread
From: ebotcazou at gcc dot gnu.org @ 2018-07-06 11:19 UTC (permalink / raw)
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86417
Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |ebotcazou at gcc dot gnu.org
--- Comment #6 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> It took me a while to figure out how to actually run the Fortran subset of
> the libgomp suite (which is not very well documented, or I'm too stupid to
> find it).
It is run automatically now by typing "make -k check-fortran" at top level.
>From gcc-bugs-return-609331-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jul 06 11:52:38 2018
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From: "janus at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/86417] [9 Regression] FAIL: libgomp.fortran/alloc-comp-3.f90 -O0 (test for excess errors)
Date: Fri, 06 Jul 2018 11:52:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86417
--- Comment #7 from janus at gcc dot gnu.org ---
(In reply to Eric Botcazou from comment #6)
> It is run automatically now by typing "make -k check-fortran" at top level.
Ah, thanks for the remark (wasn't aware of that). Nice!
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Subject: [Bug libstdc++/85494] implementation of random_device on mingw is useless
Date: Fri, 06 Jul 2018 12:01:00 -0000
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Dimitrij Mijoski <dmjpp at hotmail dot com> changed:
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--- Comment #2 from Dimitrij Mijoski <dmjpp at hotmail dot com> ---
I have created a patch that fixes this for mingw-w64 using rand_s()
https://msdn.microsoft.com/en-us/library/sxtz2fa8.aspx
It does not work with mingw.org (reverts to mt19973 as now). mingw.org does not
have rand_s() declared in its headers.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/85494] implementation of random_device on mingw is useless
Date: Fri, 06 Jul 2018 12:04:00 -0000
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--- Comment #3 from Dimitrij Mijoski <dmjpp at hotmail dot com> ---
Created attachment 44358
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44358&action=edit
implements proper random_device for mingw-w64
>From gcc-bugs-return-609334-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jul 06 12:19:01 2018
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Subject: [Bug libstdc++/86419] New: codecvt<char16_t, ...>::in() and out() incorrectly return partial in some cases.
Date: Fri, 06 Jul 2018 12:19:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86419
Bug ID: 86419
Summary: codecvt<char16_t, ...>::in() and out() incorrectly
return partial in some cases.
Product: gcc
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I have created a bunch of test cases, and on some it fails unexpectedly. I'll
post the code as attachment, the lines with the bug have the word "bug".
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Subject: [Bug libstdc++/86419] codecvt<char16_t, ...>::in() and out() incorrectly return partial in some cases.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86419
--- Comment #1 from Dimitrij Mijoski <dmjpp at hotmail dot com> ---
Created attachment 44359
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44359&action=edit
test cases that trigger the bug
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/85494] implementation of random_device on mingw is useless
Date: Fri, 06 Jul 2018 12:26:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85494
--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Thanks, but please see https://gcc.gnu.org/contribute.html#legal
We can't use a patch without those steps being completed.
Also patches should be sent to the mailing lists, not attached to bugzilla, see
https://gcc.gnu.org/contribute.html#patches
(N.B. I've already started work on an alternative implementation that uses
RtlGenRandom instead).
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From: "dmjpp at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/86419] codecvt<char16_t, ...>::in() and out() incorrectly return partial in some cases.
Date: Fri, 06 Jul 2018 12:33:00 -0000
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Dimitrij Mijoski <dmjpp at hotmail dot com> changed:
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----------------------------------------------------------------------------
Attachment #44359|0 |1
is obsolete| |
--- Comment #2 from Dimitrij Mijoski <dmjpp at hotmail dot com> ---
Created attachment 44360
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44360&action=edit
better test cases with proper asserts
In the previous file the asserts were accustomed to the bugged behavior, had
only comments.
in this file the asserts are made as the expected behavior.
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/86419] codecvt<char16_t, ...>::in() and out() incorrectly return partial in some cases.
Date: Fri, 06 Jul 2018 12:43:00 -0000
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Thanks, this is still present in the latest version of the code too.
This just includes the failing cases:
#include <cassert>
#include <locale>
using namespace std;
// 2 code points, both are 4 byte in UTF-8.
// in UTF-16 both are 2 unit i.e. surrogate pairs
const char* u8in = u8"\U0010FFFF\U0010AAAA";
//tests .in() function of codecvt<char16_t, char, mbstate>
auto test_u16_in()
{
char16_t u16out[4];
auto& cvt =
use_facet<codecvt<char16_t, char, mbstate_t>>(locale::classic());
auto state = mbstate_t{};
auto in_ptr = u8in;
auto out_ptr = u16out;
state = {};
in_ptr = nullptr;
out_ptr = nullptr;
auto res =
cvt.in(state, u8in, u8in + 6, in_ptr, u16out, u16out + 2, out_ptr);
// actual output
assert(res == cvt.partial); // BUG
assert(out_ptr == u16out + 2);
assert(in_ptr == u8in + 4);
// expected output
// assert(res == cvt.partial);
// assert(out_ptr == u16str+2);
// assert(in_ptr == u8str+4);
state = {};
in_ptr = nullptr;
out_ptr = nullptr;
res =
cvt.in(state, u8in, u8in + 8, in_ptr, u16out, u16out + 2, out_ptr);
// actual output
assert(res == cvt.partial); // BUG
assert(out_ptr == u16out + 2);
assert(in_ptr == u8in + 4);
// expected output
// assert(res == cvt.partial);
// assert(out_ptr == u16str+2);
// assert(in_ptr == u8str+4);
}
//tests .out() function of codecvt<char16_t, char, mbstate>
auto test_u16_out()
{
const char16_t* u16in = u"\U0010FFFF\U0010AAAA";
char u8out[8];
auto& cvt =
use_facet<codecvt<char16_t, char, mbstate_t>>(locale::classic());
auto state = mbstate_t{};
auto in_ptr = u16in;
auto out_ptr = u8out;
state = {};
in_ptr = nullptr;
out_ptr = nullptr;
auto res =
cvt.out(state, u16in, u16in + 1, in_ptr, u8out, u8out + 3,
out_ptr);
assert(res == cvt.partial); // BUG
assert(in_ptr == u16in);
assert(out_ptr == u8out);
state = {};
in_ptr = nullptr;
out_ptr = nullptr;
res =
cvt.out(state, u16in, u16in + 1, in_ptr, u8out, u8out + 4,
out_ptr);
assert(res == cvt.partial); // BUG
assert(in_ptr == u16in);
assert(out_ptr == u8out);
state = {};
in_ptr = nullptr;
out_ptr = nullptr;
res =
cvt.out(state, u16in, u16in + 3, in_ptr, u8out, u8out + 4,
out_ptr);
assert(res == cvt.partial); // BUG
assert(in_ptr == u16in + 2);
assert(out_ptr == u8out + 4);
state = {};
in_ptr = nullptr;
out_ptr = nullptr;
res =
cvt.out(state, u16in, u16in + 3, in_ptr, u8out, u8out + 8,
out_ptr);
assert(res == cvt.partial); // BUG
assert(in_ptr == u16in + 2);
assert(out_ptr == u8out + 4);
}
int main()
{
test_u16_in();
test_u16_out();
}
>From gcc-bugs-return-609339-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jul 06 12:44:04 2018
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/86419] codecvt<char16_t, ...>::in() and out() incorrectly return partial in some cases.
Date: Fri, 06 Jul 2018 12:44:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86419
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-07-06
Ever confirmed|0 |1
>From gcc-bugs-return-609340-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jul 06 12:47:46 2018
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From: "nsz at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/86420] New: [9 regression] nextafter(0x1p-1022,0) is constant folded
Date: Fri, 06 Jul 2018 12:47:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86420
Bug ID: 86420
Summary: [9 regression] nextafter(0x1p-1022,0) is constant
folded
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Reporter: nsz at gcc dot gnu.org
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nextafterf(FLT_MIN,0), nextafter(DBL_MIN,0), nextafterl(LDBL_MIN,0) should
signal the underflow exception (c99 annex F requirement), but now gcc constant
folds them, this causes the following glibc test failures with gcc trunk:
FAIL: math/bug-nextafter
FAIL: math/bug-nexttoward
for
double f(void)
{
return __builtin_nextafter (0x1p-1022, 0);
}
on aarch64 with gcc -O2 -S -std=c11 -frounding-math
i get
f:
mov x0, 4503599627370495
fmov d0, x0
ret
with gcc-8 it is
f:
movi d1, #0
mov x0, 4503599627370496
fmov d0, x0
b nextafter
gcc has no flag to say 'floating-point exceptions matter' (like -frounding-math
for non-default rounding mode) so i think gcc should not do such optimizations
in standard conform mode where users might test for exceptions.
>From gcc-bugs-return-609341-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jul 06 13:26:16 2018
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Subject: Re: [Bug target/86383] [9 Regression] arm-netbsdelf cross compiler fails in selftests
To: Kamil Rytarowski <n54@gmx.com>, "rearnsha at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>, gcc-bugs@gcc.gnu.org
References: <bug-86383-4@http.gcc.gnu.org/bugzilla/> <bug-86383-4-roe7g6Jp7o@http.gcc.gnu.org/bugzilla/> <ab84a63d-cc85-0cfd-a3a6-d6deab95488c@gmx.com> <471e8255-162f-4cdd-45bc-274271cfe973@arm.com> <11bdfd68-ac9b-fd06-81b1-df39b5dae66d@gmx.com>
From: "Richard Earnshaw (lists)" <Richard.Earnshaw@arm.com>
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On 06/07/18 12:11, Kamil Rytarowski wrote:
> On 06.07.2018 12:38, Richard Earnshaw (lists) wrote:
>> On 06/07/18 11:32, Kamil Rytarowski wrote:
>>> On 04.07.2018 20:55, rearnsha at gcc dot gnu.org wrote:
>>>> https://gcc.gnu.org/bugzilla/show_bug.cgi?id†383
>>>>
>>>> --- Comment #2 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
>>>> I'm not sure how relevant the netbsd-elf port is these days. I believe they've
>>>> now moved onto an EABI based ABI. But no GCC port of that has been
>>>> contributed.
>>>>
>>>
>>> NetBSD switched on newer ARM CPUs to EABI and keeps compat with OABI. A
>>> user is free to build either EABI and OABI for ARMv4+ CPUs. Older pre
>>> ARMv4 CPUs use OABI only.
>>>
>>
>> GCC-9 will drop support for pre-armv4 CPUs. Such support has been
>> marked as deprecated for about 3 years now.
>>
>
> We verify these ports on real hardware.
>
> NetBSD/shark is prepared to be switched to Clang/LLVM as GCC is
> obsoleting it and surprisingly LLVM soon might have support for a wider
> range of ARM CPUs.
>
Shark's use strongARM cpus, which are ARMv4. That's not been obsoleted,
but it is considered deprecated these days.
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