* [Bug target/86651] [8/9 Regression] lto-wrapper.exe: fatal error: simple_object_copy_lto_debug_sections not implemented: Invalid argument
[not found] <bug-86651-4@http.gcc.gnu.org/bugzilla/>
@ 2018-08-08 18:19 ` jwjagersma at gmail dot com
0 siblings, 0 replies; only message in thread
From: jwjagersma at gmail dot com @ 2018-08-08 18:19 UTC (permalink / raw)
To: gcc-bugs
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86651
--- Comment #17 from jwjagersma at gmail dot com ---
If anyone opens a new PR, please cc me. I am unable to contribute right now due
to some health issues.
>From gcc-bugs-return-612416-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 08 18:31:29 2018
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From: "amonakov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/82418] Division on a constant is suboptimal because of not using imul instruction
Date: Wed, 08 Aug 2018 18:31:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82418
Alexander Monakov <amonakov at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |uros at gcc dot gnu.org
--- Comment #6 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
(the 'divx' function in comment 5 does not implement division by 100)
I'd like to see GCC improve here, so I looked at how this could be fixed. I'm
afraid adjusting expand_divmod to select the cheaper alternative on x86 is
going to be too complicated. I think it may be reasonable to conceal the 32x32
mul-highpart pattern on x86 from expand_divmod, so it uses the 32x32->64
widening multiply which leads to optimal code.
I also think the 32x32 mul-highpart pattern is not very useful outside of magic
division by constants, so concealing it altogether may be acceptable if no
better solution is available.
(to recap, we want 64-bit imul here rather than 32-bit widening mul with result
in edx:eax, because imul has better latency and throughput, less regalloc
constraints, and doesn't need a register to hold the immediate)
Patch I'm testing to disallow 32x32 mul-highpart on 64-bit x86:
--- a/gcc/config/i386/i386.md
+++ b/gcc/config/i386/i386.md
@@ -1042,6 +1042,10 @@ (define_mode_iterator SWIM248 [(HI "TARGET_HIMODE_MATH")
(define_mode_iterator DWI [(DI "!TARGET_64BIT")
(TI "TARGET_64BIT")])
+;; Widest single word integer modes.
+(define_mode_iterator SWI48W [(SI "!TARGET_64BIT")
+ (DI "TARGET_64BIT")])
+
;; GET_MODE_SIZE for selected modes. As GET_MODE_SIZE is not
;; compile time constant, it is faster to use <MODE_SIZE> than
;; GET_MODE_SIZE (<MODE>mode). For XFmode which depends on
@@ -7792,16 +7796,16 @@ (define_insn "*<u>mulqihi3_1"
(set_attr "mode" "QI")])
(define_expand "<s>mul<mode>3_highpart"
- [(parallel [(set (match_operand:SWI48 0 "register_operand")
- (truncate:SWI48
+ [(parallel [(set (match_operand:SWI48W 0 "register_operand")
+ (truncate:SWI48W
(lshiftrt:<DWI>
(mult:<DWI>
(any_extend:<DWI>
- (match_operand:SWI48 1 "nonimmediate_operand"))
+ (match_operand:SWI48W 1 "nonimmediate_operand"))
(any_extend:<DWI>
- (match_operand:SWI48 2 "register_operand")))
+ (match_operand:SWI48W 2 "register_operand")))
(match_dup 3))))
- (clobber (match_scratch:SWI48 4))
+ (clobber (match_scratch:SWI48W 4))
(clobber (reg:CC FLAGS_REG))])]
""
"operands[3] = GEN_INT (GET_MODE_BITSIZE (<MODE>mode));")
>From gcc-bugs-return-612417-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 08 18:44:05 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/82418] Division on a constant is suboptimal because of not using imul instruction
Date: Wed, 08 Aug 2018 18:44:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82418
--- Comment #7 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Alexander Monakov from comment #6)
> +;; Widest single word integer modes.
> +(define_mode_iterator SWI48W [(SI "!TARGET_64BIT")
> + (DI "TARGET_64BIT")])
Please use existing DWIH mode iterator instead.
>From gcc-bugs-return-612418-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 08 19:49:13 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/86893] New: implement F202x .andthen. / .orelse. operators
Date: Wed, 08 Aug 2018 19:49:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86893
Bug ID: 86893
Summary: implement F202x .andthen. / .orelse. operators
Product: gcc
Version: 9.0
Status: UNCONFIRMED
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Priority: P3
Component: fortran
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Reporter: janus at gcc dot gnu.org
Target Milestone: ---
The .and. / .or. operators in the current F2018 standard do not make any
guarantees about whether any of the arguments is required to be evaluated, or
is required to be optimized out.
There are rumors that new "short-circuiting" operators might be part of an
upcoming F202x standard. Those could be named .andthen., .andelse., .orelse. or
similar. Alternatively one could use C-style operators (&& and ||).
The new operators would be guaranteed to do left-to-right short-circuiting,
i.e. the second operand will not be evaluated if the value of the first one
already determines the final result.
Consequently the old .and. / .or. operators would be guaranteed to *not* do
short-circuiting (or only in cases where it makes no difference).
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Subject: [Bug target/46179] Codegen/TLS: invalid assembler syntax
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--- Comment #13 from Andreas Schwab <schwab at gcc dot gnu.org> ---
Author: schwab
Date: Wed Aug 8 20:01:26 2018
New Revision: 263432
URL: https://gcc.gnu.org/viewcvs?rev=263432&root=gcc&view=rev
Log:
m68k: handle more cases of TLS symbols with offset
PR target/46179
* config/m68k/m68k.h (FINAL_PRESCAN_INSN): Don't define.
* config/m68k/m68k.c (handle_move_double): Don't call
m68k_final_prescan_insn.
(m68k_adjust_decorated_operand): Renamed from
m68k_final_prescan_insn, remove first and third operand and
simplify.
(print_operand): Call it.
(print_operand_address): Call it.
PR target/46179
* gcc.target/m68k/tls-dimode.c: New file.
Added:
trunk/gcc/testsuite/gcc.target/m68k/tls-dimode.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/m68k/m68k.c
trunk/gcc/config/m68k/m68k.h
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-612420-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Aug 08 20:40:20 2018
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Subject: [Bug rtl-optimization/86882] [9 Regression] ICE in reg_overlap_mentioned_p, at rtlanal.c:1873
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--- Comment #5 from Segher Boessenkool <segher at gcc dot gnu.org> ---
So what is wrong about that? CONST_INTs are sign-extended always, so
0xffffffffffffff00 is just fine?
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Subject: [Bug rtl-optimization/86892] RTL CSE commoning trivial constants across call and/or too early
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-08-08
Ever confirmed|0 |1
--- Comment #1 from Segher Boessenkool <segher at gcc dot gnu.org> ---
If you use another constant instead of 0, it fails on most platforms.
Confirmed.
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86894
Bug ID: 86894
Summary: error for a zero-length array initialized with empty
braced list
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: msebor at gcc dot gnu.org
Target Milestone: ---
As discussed in the review at
https://gcc.gnu.org/ml/gcc-patches/2018-08/msg00601.html, when -Wpedantic is
used, GCC rejects the following program with a hard error when it should be
accepted with a pedantic warning.
$ cat e.c && gcc -S -Wall -Wextra -Wpedantic e.c
char a[] = { };
e.c:1:12: warning: ISO C forbids empty initializer braces [-Wpedantic]
char a[] = { };
^
e.c:1:6: error: zero or negative size array ‘a’
char a[] = { };
^
>From gcc-bugs-return-612424-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 09 01:22:10 2018
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Subject: [Bug c++/86503] Segmentation fault signal terminated
Date: Thu, 09 Aug 2018 01:22:00 -0000
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--- Comment #3 from zhonghao at pku dot org.cn ---
(In reply to Richard Biener from comment #1)
> You run out of memory or stack. Try ulimit -s unlimited
I tried ulimit -s unlimited. This time, the error messages are as follows:
g++ -ftemplate-depth=1000000 test.cpp
test.cpp: In substitution of 'template<class F, int n> __typeof__ (ft<F, (n -
1)>(F(), 0)) ft(F, typename enable_if<(n != 0), int>::type) [with F =
main()::a*; int n = -999997]':
test.cpp:14:21: recursively required by substitution of 'template<class F,
int n> __typeof__ (ft<F, (n - 1)>(F(), 0)) ft(F, typename enable_if<(n != 0),
int>::type) [with F = main()::a*; int n = 1]'
test.cpp:14:21: required by substitution of 'template<class F, int n>
__typeof__ (ft<F, (n - 1)>(F(), 0)) ft(F, typename enable_if<(n != 0),
int>::type) [with F = main()::a*; int n = 2]'
test.cpp:18:30: required from here
test.cpp:14:21: fatal error: template instantiation depth exceeds maximum of
1000000 (use -ftemplate-depth= to increase the maximum)
typeof( ft< F, n-1 >( F(), 0 ) )
~~~~~~~~~~~~~~^~~~~~~~~~~~
compilation terminated.
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Subject: [Bug c/82967] "did you mean" suggestions are way too suggestive
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=81419
--- Comment #5 from Eric Gallager <egallager at gcc dot gnu.org> ---
ASSIGNED since there's an assignee. Also possibly related to bug 81419
>From gcc-bugs-return-612426-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 09 02:27:34 2018
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Subject: [Bug tree-optimization/86889] s390x gcc build fails when configured with --disable-checking
Date: Thu, 09 Aug 2018 02:27:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
CC| |msebor at gcc dot gnu.org
Blocks| |56456
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
I can't confirm it yet. Could you attach a test case or a preprocessing
translation unit?
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56456
[Bug 56456] [meta-bug] bogus/missing -Warray-bounds
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Subject: [Bug rtl-optimization/86882] [9 Regression] ICE in reg_overlap_mentioned_p, at rtlanal.c:1873
Date: Thu, 09 Aug 2018 06:22:00 -0000
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--- Comment #6 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Segher Boessenkool from comment #5)
> So what is wrong about that? CONST_INTs are sign-extended always, so
> 0xffffffffffffff00 is just fine?
As said in Comment #2, it is not wrong, just suspicious.
(insn 10 9 11 3 (set (reg:SI 94 [ <retval> ])
(zero_extend:SI (reg:QI 92 [ <retval> ]))) "pr86882.c":10 140
{*zero_extendqisi2}
(nil))
(insn 11 10 13 3 (parallel [
(set (reg:SI 95 [ jd ])
(xor:SI (reg:SI 94 [ <retval> ])
(const_int 257 [0x101])))
(clobber (reg:CC 17 flags))
]) "pr86882.c":10 461 {*xorsi_1}
(expr_list:REG_DEAD (reg:SI 94 [ <retval> ])
(expr_list:REG_UNUSED (reg:CC 17 flags)
(nil))))
(insn 13 11 14 3 (parallel [
(set (reg:HI 97)
(xor:HI (subreg:HI (reg:SI 95 [ jd ]) 0)
(subreg:HI (reg:QI 92 [ <retval> ]) 0)))
(clobber (reg:CC 17 flags))
]) "pr86882.c":11 459 {*xorhi_1}
(expr_list:REG_DEAD (reg:SI 95 [ jd ])
(expr_list:REG_DEAD (reg:QI 92 [ <retval> ])
(expr_list:REG_UNUSED (reg:CC 17 flags)
(nil)))))
gets combined to:
Trying 10, 11 -> 13:
Successfully matched this instruction:
(set (reg:HI 95 [ jd ])
(and:HI (subreg:HI (reg:QI 92 [ <retval> ]) 0)
(const_int -256 [0xffffffffffffff00])))
Successfully matched this instruction:
(set (reg:HI 97)
(xor:HI (reg:HI 95 [ jd ])
(const_int 257 [0x101])))
The first one operates on paradoxical HImode subreg of QImode input operand
(valid bitmask 0xff), which is masked with 0xff00. The result is a value, which
has only highpart unmasked and lowpart = 0x00. Later, a couple instructions
operate in HImode, but finally we get to:
(insn 14 13 15 3 (set (reg:QI 92 [ <retval> ])
(subreg:QI (reg:HI 97) 0)) "pr86882.c":11 88 {*movqi_internal}
(nil))
which discards paradoxical highpart from the Himode operations. So, I guess the
above is OK (but I didn't check the validity of XOR and AND simplifications in
different modes).
It looks to me that the invalid RTX from comment #1 should read:
(set (reg:QI 97)
(const_int 1 [0x1]))
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Subject: [Bug target/84332] ICE in insn_default_length, at config/s390/s390.md:9697 for -fstack-clash-protection
Date: Thu, 09 Aug 2018 07:07:00 -0000
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--- Comment #3 from Andreas Krebbel <krebbel at gcc dot gnu.org> ---
Author: krebbel
Date: Thu Aug 9 07:06:23 2018
New Revision: 263441
URL: https://gcc.gnu.org/viewcvs?rev=263441&root=gcc&view=rev
Log:
S/390: Fix PR84332 ICE with stack clash protection
Our implementation of the stack probe requires the probe interval to
be used as displacement in an address operand. The maximum probe
interval currently is 64k. This would exceed short displacements.
Trim that value down to 4k if that happens. This might result in too
many probes being generated only on the oldest supported machine level
z900.
gcc/ChangeLog:
2018-08-09 Andreas Krebbel <krebbel@linux.ibm.com>
PR target/84332
* config/s390/s390.c (s390_option_override_internal): Reduce the
stack-clash-protection-probe-interval param if it would be too big
for z900.
gcc/testsuite/ChangeLog:
2018-08-09 Andreas Krebbel <krebbel@linux.ibm.com>
PR target/84332
* gcc.target/s390/pr84332.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.target/s390/pr84332.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/s390/s390.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug target/84332] ICE in insn_default_length, at config/s390/s390.md:9697 for -fstack-clash-protection
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Andreas Krebbel <krebbel at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Andreas Krebbel <krebbel at gcc dot gnu.org> ---
Fixed with commit from comment 3
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Subject: [Bug tree-optimization/86889] s390x gcc build fails when configured with --disable-checking
Date: Thu, 09 Aug 2018 09:02:00 -0000
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--- Comment #2 from Ilya Leoshkevich <iii at linux dot ibm.com> ---
C-Reduced version:
struct a {
long b[128 / (8 * 8)];
};
int c;
void d() {
a *e;
long f;
int g = 1;
for (; g >= 0; g--) {
f = e->b[g];
if (f)
goto h;
}
__builtin_unreachable();
h:
c = g;
}
Repro:
$ PATH=build/prev-gcc:$PATH xg++ -c -O2 -Warray-bounds bitmap.E.c
bitmap.E.c: In function ‘void d()’:
bitmap.E.c:10:15: warning: array subscript -1 is below array bounds of ‘long
int [2]’ [-Warray-bounds]
f = e->b[g];
~~~~~~^
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Subject: [Bug c++/86503] Segmentation fault signal terminated
Date: Thu, 09 Aug 2018 09:07:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86503
Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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>From gcc-bugs-return-612432-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 09 09:52:04 2018
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From: "niva at niisi dot msk.ru" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/86895] New: Wrong description of -fvect-cost-model in common.opt
Date: Thu, 09 Aug 2018 09:52:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86895
Bug ID: 86895
Summary: Wrong description of -fvect-cost-model in common.opt
Product: gcc
Version: 8.2.1
Status: UNCONFIRMED
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gcc --help -v prints the following:
Specifies the cost model for vectorization.
-fvect-cost-model=[unlimited|dynamic|cheap] Specifies
the cost model for vectorization.
I think that this results from the defect in gcc/common.opt:
fvect-cost-model=
Common Joined RejectNegative Enum(vect_cost_model) Var(flag_vect_cost_model)
Init(VECT_COST_MODEL_DEFAULT) Optimization
Specifies the cost model for vectorization.
-fvect-cost-model=[unlimited|dynamic|cheap] Specifies the cost model for
vectorization.
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From: "kretz at kde dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/86896] New: invalid vmovdqa64 instruction for KNL emitted
Date: Thu, 09 Aug 2018 10:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86896
Bug ID: 86896
Summary: invalid vmovdqa64 instruction for KNL emitted
Product: gcc
Version: 8.1.0
Status: UNCONFIRMED
Keywords: wrong-code
Severity: normal
Priority: P3
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Test case (unreduced) at
https://web-docs.gsi.de/~mkretz/invalid_knl_instruction.cpp
Compile the test case with `g++ -std=c++17 -O1 -march=knl
invalid_knl_instruction.cpp`
Output when testing with Intel SDE `-knl`:
TID 0 SDE-ERROR: Executed instruction not valid for specified chip (KNL):
0x41eb28: vmovdqa64 xmm4, xmm16
Image: a.out+0x1eb28 (in multi-region image, region# 0)
Function:
_ZN5Tests10operators_IN2Vc2v24simdIyNS2_8simd_abi11__fixed_abiILi31EEEEEE3runEv
Instruction bytes are: 62 b1 fd 08 6f e0
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Subject: [Bug c/86895] Wrong description of -fvect-cost-model in common.opt
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86895
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-08-09
CC| |marxin at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |marxin at gcc dot gnu.org
Target Milestone|--- |9.0
Ever confirmed|0 |1
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Yes, it's error that I done in r245788, let me fix that.
>From gcc-bugs-return-612435-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 09 10:37:39 2018
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Subject: [Bug c/86895] Wrong description of -fvect-cost-model in common.opt
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Thu Aug 9 10:37:02 2018
New Revision: 263444
URL: https://gcc.gnu.org/viewcvs?rev=263444&root=gcc&view=rev
Log:
Remove extra line in common.opt (PR c/86895).
2018-08-09 Martin Liska <mliska@suse.cz>
PR c/86895
* common.opt: Remove extra line.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/common.opt
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Subject: [Bug middle-end/86897] [9 regression] gcc.dg/uninit-suppress_2.c FAILs
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Rainer Orth <ro at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Subject: [Bug middle-end/86897] New: [9 regression] gcc.dg/uninit-suppress_2.c FAILs
Date: Thu, 09 Aug 2018 10:38:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86897
Bug ID: 86897
Summary: [9 regression] gcc.dg/uninit-suppress_2.c FAILs
Product: gcc
Version: 9.0
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Between 20180806 (r263336) and 20180807 (r263360), gcc.dg/uninit-suppress_2.c
started to FAIL:
+FAIL: gcc.dg/uninit-suppress_2.c should not be promoted to error (test for
warnings, line 16)
I'm seeing it on 32 and 64-bit Solaris/SPARC and x86, according to
gcc-testresults this seems to happen everywhere.
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Subject: [Bug c/86895] Wrong description of -fvect-cost-model in common.opt
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Martin Liška <marxin at gcc dot gnu.org> changed:
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--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed on trunk.
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Subject: [Bug middle-end/86897] [9 regression] gcc.dg/uninit-suppress_2.c FAILs
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86897
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-08-09
CC| |law 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> ---
Confirmed, started with r263342.
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Subject: [Bug c++/86898] [9 regression] g++.old-deja/g++.mike/p784.C FAILs
Date: Thu, 09 Aug 2018 10:49:00 -0000
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Rainer Orth <ro at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |9.0
>From gcc-bugs-return-612440-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 09 10:49:21 2018
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Subject: [Bug c++/86898] New: [9 regression] g++.old-deja/g++.mike/p784.C FAILs
Date: Thu, 09 Aug 2018 10:49:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86898
Bug ID: 86898
Summary: [9 regression] g++.old-deja/g++.mike/p784.C FAILs
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
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Target Milestone: ---
Between 20180807 (r263360) and 20180808 (r263409), g++.old-deja/g++.mike/p784.C
started to FAIL
+FAIL: g++.old-deja/g++.mike/p784.C -std=gnu++11 (test for excess errors)
+FAIL: g++.old-deja/g++.mike/p784.C -std=gnu++14 (test for excess errors)
+FAIL: g++.old-deja/g++.mike/p784.C -std=gnu++98 (test for excess errors)
I'm seeing it on 32-bit Solaris/SPARC and x86 only, but gcc-testresults lists
many others.
Excess errors:
/vol/gcc/src/hg/trunk/local/gcc/testsuite/g++.old-deja/g++.mike/p784.C:1185:21:
error: friend declaration of 'String common_prefix(const String&, const
String&, int)' specifies default arguments and isn't a definition
[-fpermissive]
/vol/gcc/src/hg/trunk/local/gcc/testsuite/g++.old-deja/g++.mike/p784.C:1187:21:
error: friend declaration of 'String common_suffix(const String&, const
String&, int)' specifies default arguments and isn't a definition
[-fpermissive]
/vol/gcc/src/hg/trunk/local/gcc/testsuite/g++.old-deja/g++.mike/p784.C:1226:21:
error: friend declaration of 'int readline(istream&, String&, char, int)'
specifies default arguments and isn't a definition [-fpermissive]
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Subject: [Bug target/86896] invalid vmovdqa64 instruction for KNL emitted
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-08-09
CC| |marxin at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed in 8.2.0, seen in 8.1.0. I'm bisecting right now.
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed on trunk in r260969 which is a front-end change. Thus I'm going to
isolate a smaller test-case first.
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Subject: [Bug sanitizer/86899] New: [7? regression] TSAN incorrect warning: control reaches end of non-void function
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86899
Bug ID: 86899
Summary: [7? regression] TSAN incorrect warning: control
reaches end of non-void function
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: sanitizer
Assignee: unassigned at gcc dot gnu.org
Reporter: dimhen at gmail dot com
CC: dodji at gcc dot gnu.org, dvyukov at gcc dot gnu.org,
jakub at gcc dot gnu.org, kcc at gcc dot gnu.org, marxin at gcc dot gnu.org
Target Milestone: ---
r255400 PASS
r255622 FAIL
r263351 FAIL
$ cat a.cpp
int foo()
{
return 0;
if(0) {
return 0;
}
}
$ g++ -Wall -c a.cpp
$ g++ -Wall -fsanitize=thread -c a.cpp
a.cpp: In function ‘int foo()’:
a.cpp:7:1: warning: control reaches end of non-void function [-Wreturn-type]
}
^
$ g++ -v
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/usr/local/gcc_current/libexec/gcc/x86_64-pc-linux-gnu/9.0.0/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
Target: x86_64-pc-linux-gnu
Configured with: /home/dimhen/src/gcc_current/configure
--prefix=/usr/local/gcc_current --enable-checking=yes,df,fold,rtl,extra
--enable-languages=c,c++,lto --disable-multilib --enable-shared
--enable-threads=posix --enable-__cxa_atexit --disable-libunwind-exceptions
--enable-gnu-unique-object --enable-linker-build-id
--with-linker-hash-style=gnu --enable-plugin --enable-initfini-array --with-isl
--enable-libmpx --enable-offload-targets=nvptx-none --without-cuda-driver
--enable-gnu-indirect-function --with-tune=native
Thread model: posix
gcc version 9.0.0 20180807 (experimental) [trunk revision 263351] (GCC)
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Subject: [Bug sanitizer/86899] [8/9 regression] TSAN incorrect warning: control reaches end of non-void function
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-08-09
Known to work| |7.3.0
Target Milestone|--- |8.3
Summary|[7? regression] TSAN |[8/9 regression] TSAN
|incorrect warning: control |incorrect warning: control
|reaches end of non-void |reaches end of non-void
|function |function
Ever confirmed|0 |1
Known to fail| |8.2.0, 9.0
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Started with Jakub's r255403.
>From gcc-bugs-return-612446-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 09 13:27:02 2018
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From: "law at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/86897] [9 regression] gcc.dg/uninit-suppress_2.c FAILs
Date: Thu, 09 Aug 2018 13:27:00 -0000
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--- Comment #2 from Jeffrey A. Law <law at redhat dot com> ---
Yea, the fix for this was in my tree when I was testing. The DOM changes
compromise the test. I'll push my fix to the trunk in a couple hours when I'm
back online.
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Subject: [Bug target/86887] [9 Regression] aarch64: adcs accepts only register arguments
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--- Comment #2 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
Author: rearnsha
Date: Thu Aug 9 13:39:17 2018
New Revision: 263446
URL: https://gcc.gnu.org/viewcvs?rev=263446&root=gcc&view=rev
Log:
aarch64 - PR target/86887 Fix missing register constraints in carryin patterns
Some of the carryin insn patterns are missing a register constraint.
That means that the register allocator can pick practically anything
to hold that value, including memory locations, or registers of the
wrong class.
PR target/86887
* config/aarch64/aarch64.md (add<mode>3_carryinC_zero): Add missing
register constraint to operand 0.
(add<mode>3_carryinC): Likewise.
(add<mode>3_carryinV_zero, add<mode>3_carryinV): Likewise.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/aarch64/aarch64.md
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Subject: [Bug target/86887] [9 Regression] aarch64: adcs accepts only register arguments
Date: Thu, 09 Aug 2018 13:44:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86887
Richard Earnshaw <rearnsha at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #3 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
Fixed.
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From: "jan.kratochvil at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86900] New: -gdwarf-5 -O2 -ffunction-sections = assembler error
Date: Thu, 09 Aug 2018 14:22:00 -0000
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Bug ID: 86900
Summary: -gdwarf-5 -O2 -ffunction-sections = assembler error
Product: gcc
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Target Milestone: ---
g++ -gdwarf-5 -O2 -ffunction-sections -c 1.cc -o 1.o
/tmp/ccnCmT6w.s: Assembler messages:
/tmp/ccnCmT6w.s:61840: Error: invalid operands
(.text.unlikely._ZN4base27HistogramDeltaSerialization11RecordDeltaERKNS_13HistogramBaseERKNS_16HistogramSamplesE
and
.text._ZN4base27HistogramDeltaSerialization11RecordDeltaERKNS_13HistogramBaseERKNS_16HistogramSamplesE
sections) for `-'
...
FAIL: gcc-8.2.1-1dwarf64.fc28.x86_64
FAIL: gcc-8.1.1-5.fc28.x86_64
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Subject: [Bug c++/86871] [8/9 Regression] ICE: gimple check: expected gimple_assign(error_mark), have gimple_call(trunc_mod_expr) in gimple_assign_lhs, at gimple.h:2462
Date: Thu, 09 Aug 2018 14:38:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86871
--- Comment #7 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
Author: rsandifo
Date: Thu Aug 9 14:37:24 2018
New Revision: 263447
URL: https://gcc.gnu.org/viewcvs?rev=263447&root=gcc&view=rev
Log:
Fix invalid assumption in vect_transform_stmt (PR 86871)
The handling of outer-loop uses of inner-loop definitions assumed
that anything that wasn't a PHI would be a gassign. It's also
possible for it to be a gcall.
2018-08-08 Richard Sandiford <richard.sandiford@arm.com>
gcc/
PR tree-optimization/86871
* tree-vect-stmts.c (vect_transform_stmt): Use gimple_get_lhs
instead of gimple_assign_lhs.
gcc/testsuite/
PR tree-optimization/86871
* gcc.dg/vect/pr86871.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/vect/pr86871.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-vect-stmts.c
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Subject: [Bug tree-optimization/86858] [9 Regression] GCC ICE at -O3 in as_a, at is-a.h:197
Date: Thu, 09 Aug 2018 14:46:00 -0000
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--- Comment #3 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
Author: rsandifo
Date: Thu Aug 9 14:45:02 2018
New Revision: 263448
URL: https://gcc.gnu.org/viewcvs?rev=263448&root=gcc&view=rev
Log:
Restore flow_bb_inside_loop_p tests (PR 86858)
The series to remove vinfo_for_stmt also removed tests of
flow_bb_inside_loop_p if the call was simply testing whether the
statement was in the vectorisation region. I'd tried to keep calls
that were testing whether the statement was in a particular loop
(inner or outer), but messed up in vect_is_simple_reduction and
removed calls that were actually needed. This patch restores them.
I double-checked the other removed calls and I think these are
the only ones affected.
2018-08-08 Richard Sandiford <richard.sandiford@arm.com>
gcc/
PR tree-optimization/86858
* tree-vect-loop.c (vect_is_simple_reduction): Restore
flow_bb_inside_loop_p calls.
gcc/testsuite/
PR tree-optimization/86858
* gcc.dg/vect/pr86858.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/vect/pr86858.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-vect-loop.c
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From: "dmalcolm at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug other/84889] Ideas on revamping how we format diagnostics
Date: Thu, 09 Aug 2018 15:32:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84889
--- Comment #10 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Author: dmalcolm
Date: Thu Aug 9 15:32:13 2018
New Revision: 263450
URL: https://gcc.gnu.org/viewcvs?rev=263450&root=gcc&view=rev
Log:
diagnostics: add line numbers to source (PR other/84889)
This patch adds a left margin to the lines of source (and annotations)
printed by diagnostic_show_locus, so that e.g. rather than:
test.c: In function 'test':
test.c:12:15: error: 'struct foo' has no member named 'm_bar'; did you mean
'bar'?
return ptr->m_bar;
^~~~~
bar
we print:
test.c: In function 'test':
test.c:12:15: error: 'struct foo' has no member named 'm_bar'; did you mean
'bar'?
12 | return ptr->m_bar;
| ^~~~~
| bar
Similarly, for a multiline case (in C++ this time), this:
bad-binary-ops.C: In function 'int test_2()':
bad-binary-ops.C:26:4: error: no match for 'operator+' (operand types are 's'
and 't')
return (some_function ()
~~~~~~~~~~~~~~~~
+ some_other_function ());
^~~~~~~~~~~~~~~~~~~~~~~~
becomes:
bad-binary-ops.C: In function 'int test_2()':
bad-binary-ops.C:26:4: error: no match for 'operator+' (operand types are 's'
and 't')
25 | return (some_function ()
| ~~~~~~~~~~~~~~~~
26 | + some_other_function ());
| ^~~~~~~~~~~~~~~~~~~~~~~~
I believe this slightly improves the readability of the output, in that it:
- distinguishes between the user's source code vs the annotation lines
that we're adding (the underlinings and fix-it hints here)
- shows the line numbers in another place (potentially helpful for
multiline diagnostics, where the user can see the line numbers directly,
rather than have to figure them out relative to the caret: in the 2nd
example, note how the diagnostic is reported at line 26, but the first
line printed is actually line 25)
I'm not sure that this is the precise format we want to go with [1], but
I think it's an improvement over the status quo, and we're in stage 1
of gcc 9, so there's plenty of time to shake out issues.
I've turned it on by default; it can be disabled via
-fno-diagnostics-show-line-numbers (it's also turned off in the testsuite, to
avoid breaking numerous existing test cases).
[1] Some possible variants:
- maybe just "LL|" rather than "LL | "
- maybe ':' rather than '|'
- maybe we should have some leading indentation, to better split up
the diagnostics visually via the left-hand column
- etc
gcc/ChangeLog:
PR other/84889
* common.opt (fdiagnostics-show-line-numbers): New option.
* diagnostic-show-locus.c (class layout): Add fields
"m_show_line_numbers_p" and "m_linenum_width";
(num_digits): New function.
(test_num_digits): New function.
(layout::layout): Initialize new fields. Update m_x_offset
logic to handle any left margin.
(layout::print_source_line): Print line number when requested.
(layout::start_annotation_line): New member function.
(layout::print_annotation_line): Call it.
(layout::print_leading_fixits): Likewise.
(layout::print_trailing_fixits): Likewise. Update calls to
move_to_column for new parameter.
(layout::get_x_bound_for_row): Add "add_left_margin" param and use
it to potentially call start_annotation_line.
(layout::show_ruler): Call start_annotation_line.
(selftest::test_line_numbers_multiline_range): New selftest.
(selftest::diagnostic_show_locus_c_tests): Call test_num_digits
and selftest::test_line_numbers_multiline_range.
* diagnostic.c (diagnostic_initialize): Initialize
show_line_numbers_p.
* diagnostic.h (struct diagnostic_context): Add field
"show_line_numbers_p".
* doc/invoke.texi (Diagnostic Message Formatting Options): Add
-fno-diagnostics-show-line-numbers.
* dwarf2out.c (gen_producer_string): Add
OPT_fdiagnostics_show_line_numbers to the ignored options.
* lto-wrapper.c (merge_and_complain): Likewise to the "pick
one setting" options.
(append_compiler_options): Likewise to the dropped options.
(append_diag_options): Likewise to the passed-on options.
* opts.c (common_handle_option): Handle the new option.
* toplev.c (general_init): Set up global_dc->show_line_numbers_p.
gcc/testsuite/ChangeLog:
PR other/84889
* gcc.dg/plugin/diagnostic-test-show-locus-bw-line-numbers.c: New
test.
* gcc.dg/plugin/diagnostic-test-show-locus-color-line-numbers.c:
New test.
* gcc.dg/plugin/plugin.exp (plugin_test_list): Add the new tests.
* lib/prune.exp: Add -fno-diagnostics-show-line-numbers to
TEST_ALWAYS_FLAGS.
Added:
trunk/gcc/testsuite/gcc.dg/plugin/diagnostic-test-show-locus-bw-line-numbers.c
trunk/gcc/testsuite/gcc.dg/plugin/diagnostic-test-show-locus-color-line-numbers.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/common.opt
trunk/gcc/diagnostic-show-locus.c
trunk/gcc/diagnostic.c
trunk/gcc/diagnostic.h
trunk/gcc/doc/invoke.texi
trunk/gcc/dwarf2out.c
trunk/gcc/lto-wrapper.c
trunk/gcc/opts.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/plugin/plugin.exp
trunk/gcc/testsuite/lib/prune.exp
trunk/gcc/toplev.c
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From: "wilco at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/86901] New: [AArch64] Suboptimal register allocation for int/float reinterpret
Date: Thu, 09 Aug 2018 16:03:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86901
Bug ID: 86901
Summary: [AArch64] Suboptimal register allocation for int/float
reinterpret
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: wilco at gcc dot gnu.org
Target Milestone: ---
This example (narrowed down from GLIBC) shows inefficient register allocation:
typedef unsigned int uint32_t;
float g (float);
static inline uint32_t
top12 (float x)
{
union
{
float f;
uint32_t i;
} u = {x};
return (u.i >> 20) & 0x7ff;
}
void
f1 (float y, float *p)
{
if (__builtin_expect (top12 (y) < top12 (1.0), 1))
*p = y * y;
else
g (y + y);
}
void
f2 (float y, float *p)
{
if (__builtin_expect (top12 (y) < top12 (1.0), 1))
*p = y * y;
else
g (y);
}
On AArch64 this generates with -O2:
f1:
fmov x1, d0
ubfx x1, x1, 20, 11
cmp w1, 1015
bhi .L2
fmul s0, s0, s0
str s0, [x0]
ret
.L2:
fadd s0, s0, s0
b g
f2:
.cfi_startproc
fmov s1, s0 // eh?
fmov x1, d1 // why not fmov w1, s0???
ubfx x1, x1, 20, 11
cmp w1, 1015
bhi .L7
fmul s1, s0, s0
str s1, [x0]
ret
.L7:
b g
Also the move is done as 64 bits rather than 32.
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Subject: [Bug c++/86871] [8/9 Regression] ICE: gimple check: expected gimple_assign(error_mark), have gimple_call(trunc_mod_expr) in gimple_assign_lhs, at gimple.h:2462
Date: Thu, 09 Aug 2018 16:04:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86871
--- Comment #8 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
Author: rsandifo
Date: Thu Aug 9 16:03:25 2018
New Revision: 263451
URL: https://gcc.gnu.org/viewcvs?rev=263451&root=gcc&view=rev
Log:
Allow inner-loop reductions with variable-length vectors
While working on PR 86871, I noticed we were being overly restrictive
when handling variable-length vectors. For:
for (i : ...)
{
res = ...;
for (j : ...)
res op= ...;
a[i] = res;
}
we don't need a reduction operation (although we do for double
reductions like:
res = ...;
for (i : ...)
for (j : ...)
res op= ...;
a[i] = res;
which must still be rejected).
2018-08-08 Richard Sandiford <richard.sandiford@arm.com>
gcc/
* tree-vect-loop.c (vectorizable_reduction): Allow inner-loop
reductions for variable-length vectors.
gcc/testsuite/
* gcc.target/aarch64/sve/reduc_8.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/aarch64/sve/reduc_8.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-vect-loop.c
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From: "zsojka at seznam dot cz" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/86902] New: [9 Regression] ICE: in as_a, at machmode.h:356 at -O
Date: Thu, 09 Aug 2018 16:11:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86902
Bug ID: 86902
Summary: [9 Regression] ICE: in as_a, at machmode.h:356 at -O
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: zsojka at seznam dot cz
Target Milestone: ---
Host: x86_64-pc-linux-gnu
Target: aarch64-unknown-linux-gnu
Created attachment 44521
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44521&action=edit
reduced testcase
Compiler output:
$ aarch64-unknown-linux-gnu-gcc -O testcase.c
during RTL pass: combine
testcase.c: In function 'c':
testcase.c:10:1: internal compiler error: in as_a, at machmode.h:356
}
^
0xc2ec89 scalar_int_mode as_a<scalar_int_mode>(machine_mode)
/repo/gcc-trunk/gcc/machmode.h:356
0xc2ec89 simplify_const_unary_operation(rtx_code, machine_mode, rtx_def*,
machine_mode)
/repo/gcc-trunk/gcc/simplify-rtx.c:1838
0xc28b60 simplify_unary_operation(rtx_code, machine_mode, rtx_def*,
machine_mode)
/repo/gcc-trunk/gcc/simplify-rtx.c:873
0xc2cf50 simplify_gen_unary(rtx_code, machine_mode, rtx_def*, machine_mode)
/repo/gcc-trunk/gcc/simplify-rtx.c:372
0x141f679 if_then_else_cond
/repo/gcc-trunk/gcc/combine.c:9249
0x141f468 if_then_else_cond
/repo/gcc-trunk/gcc/combine.c:9267
0x143e378 combine_simplify_rtx
/repo/gcc-trunk/gcc/combine.c:5764
0x1446529 subst
/repo/gcc-trunk/gcc/combine.c:5646
0x144613c subst
/repo/gcc-trunk/gcc/combine.c:5580
0x144ae7f try_combine
/repo/gcc-trunk/gcc/combine.c:3385
0x1456d10 combine_instructions
/repo/gcc-trunk/gcc/combine.c:1302
0x1456d10 rest_of_handle_combine
/repo/gcc-trunk/gcc/combine.c:14945
0x1456d10 execute
/repo/gcc-trunk/gcc/combine.c:14990
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
$ aarch64-unknown-linux-gnu-gcc -v
Using built-in specs.
COLLECT_GCC=/repo/gcc-trunk/binary-latest-aarch64/bin/aarch64-unknown-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-263387-checking-yes-rtl-df-extra-aarch64/bin/../libexec/gcc/aarch64-unknown-linux-gnu/9.0.0/lto-wrapper
Target: aarch64-unknown-linux-gnu
Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++
--enable-valgrind-annotations --disable-nls --enable-checking=yes,rtl,df,extra
--with-cloog --with-ppl --with-isl
--with-sysroot=/usr/aarch64-unknown-linux-gnu --build=x86_64-pc-linux-gnu
--host=x86_64-pc-linux-gnu --target=aarch64-unknown-linux-gnu
--with-ld=/usr/bin/aarch64-unknown-linux-gnu-ld
--with-as=/usr/bin/aarch64-unknown-linux-gnu-as --disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-263387-checking-yes-rtl-df-extra-aarch64
Thread model: posix
gcc version 9.0.0 20180808 (experimental) (GCC)
Tested revisions:
r263450 - FAIL
r263387 - FAIL
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Subject: [Bug target/86799] nios2 port needs updating for CVE-2017-5753
Date: Thu, 09 Aug 2018 17:00:00 -0000
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--- Comment #1 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
I nearly missed this patch for my accumulated back-porting list since it
didn't have the PR number in it.
Just adding it so that I can track things properly. The original commit
landed as r263301.
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Subject: [Bug target/86772] [meta-bug] tracking port status for CVE-2017-5753
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Bug 86772 depends on bug 86799, which changed state.
Bug 86799 Summary: nios2 port needs updating for CVE-2017-5753
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86799
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
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Richard Earnshaw <rearnsha at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
Fixed on trunk.
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Subject: [Bug middle-end/86897] [9 regression] gcc.dg/uninit-suppress_2.c FAILs
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--- Comment #3 from Jeffrey A. Law <law at gcc dot gnu.org> ---
Author: law
Date: Thu Aug 9 17:11:45 2018
New Revision: 263454
URL: https://gcc.gnu.org/viewcvs?rev=263454&root=gcc&view=rev
Log:
PR middle-end/86897
* gcc.dg/uninit-suppress_2.c: Disable DOM.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/uninit-suppress_2.c
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Subject: [Bug middle-end/86897] [9 regression] gcc.dg/uninit-suppress_2.c FAILs
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Jeffrey A. Law <law at redhat dot com> changed:
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----------------------------------------------------------------------------
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--- Comment #4 from Jeffrey A. Law <law at redhat dot com> ---
Fixed on the trunk.
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-08-09
CC| |mpolacek at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Confirmed.
>From gcc-bugs-return-612462-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 09 18:07:10 2018
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Subject: [Bug target/86684] ICE in extract_insn, at recog.c:2304 on ppc64le
Date: Thu, 09 Aug 2018 18:07:00 -0000
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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Last reconfirmed|2018-07-26 00:00:00 |2018-08-09
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--- Comment #5 from Segher Boessenkool <segher at gcc dot gnu.org> ---
I cannot reproduce this, not on gcc14 either. I notice you use ppc64le-linux,
while the canonical name is powerpc64le-linux; maybe that matters?
>From gcc-bugs-return-612463-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 09 19:43:41 2018
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Subject: [Bug middle-end/86903] New: ICE in init_target_to_host_charmap
Date: Thu, 09 Aug 2018 19:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86903
Bug ID: 86903
Summary: ICE in init_target_to_host_charmap
Product: gcc
Version: 8.0
Status: UNCONFIRMED
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Priority: P3
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$ cat w.cc
int main()
{
__builtin_printf("%ld\n", 0);
return 0;
}
$ gcc -S -fexec-charset=DE w.cc
w.cc: In function 'int main()':
w.cc:1:5: internal compiler error: converting to execution character set:
Invalid or incomplete multibyte or wide character
int main()
^~~~
0xa6ced9 c_cpp_error(cpp_reader*, int, int, rich_location*, char const*,
__va_list_tag (*) [1])
../../gcc-trunk/gcc/c-family/c-common.c:6141
0x17d74c0 cpp_diagnostic
../../gcc-trunk/libcpp/errors.c:74
0x17d7646 cpp_error(cpp_reader*, int, char const*, ...)
../../gcc-trunk/libcpp/errors.c:87
0x17d0033 cpp_host_to_exec_charset(cpp_reader*, unsigned int)
../../gcc-trunk/libcpp/charset.c:798
0xa6cff3 c_common_to_target_charset(long)
../../gcc-trunk/gcc/c-family/c-common.c:6159
0x169d2a1 init_target_to_host_charmap
../../gcc-trunk/gcc/gimple-ssa-sprintf.c:334
0x169d2a1 execute
../../gcc-trunk/gcc/gimple-ssa-sprintf.c:4086
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
>From gcc-bugs-return-612464-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 09 20:08:41 2018
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From: "dmalcolm at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug other/86904] New: Column numbers ignore tab characters
Date: Thu, 09 Aug 2018 20:08:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86904
Bug ID: 86904
Summary: Column numbers ignore tab characters
Product: gcc
Version: unknown
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Keywords: diagnostic
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As noted in https://gcc.gnu.org/bugzilla/show_bug.cgi?id=19165#c21 :
/* Both gcc and emacs number source *lines* starting at 1, but
they have differing conventions for *columns*.
GCC uses a 1-based convention for source columns,
whereas Emacs's M-x column-number-mode uses a 0-based convention.
For example, an error in the initial, left-hand
column of source line 3 is reported by GCC as:
some-file.c:3:1: error: ...etc...
On navigating to the location of that error in Emacs
(e.g. via "next-error"),
the locus is reported in the Mode Line
(assuming M-x column-number-mode) as:
some-file.c 10% (3, 0)
i.e. "3:1:" in GCC corresponds to "(3, 0)" in Emacs. */
In terms of 0 vs 1, GCC complies with the GNU standards here:
https://www.gnu.org/prep/standards/html_node/Errors.html
However our "column numbers" are also simply a 1-based byte-count, so a tab
character is treated by us as simply an increment of 1 right now.
(see also PR 49973, which covers the case of multibyte characters).
It turns out that we convert tab characters to *single* space characters when
printing source code.
This behavior has been present since Manu first implemented
-fdiagnostics-show-caret in r186305 (aka
5a9830842f69ebb059061e26f8b0699cbd85121e, PR 24985), where it was this logic
(there in diagnostic.c's diagnostic_show_locus):
char c = *line == '\t' ? ' ' : *line;
pp_character (context->printer, c);
(that logic is now in diagnostic-show-locus.c in layout::print_source_line)
This is arguably a bug, but it's intimately linked to the way in which we track
"column numbers".
Our "column numbers" are currently simply a 1-based byte-count, I believe, so a
tab character is treated by us as simply an increment of 1 right now.
There are similar issues with encodings that aren't 1 byte per character (e.g.
non-ASCII unicode characters), which are being tracked in PR 49973.
Presumably, when we print source lines containing tab characters, we should
emit a number of spaces to reach a tab stop.
Consider a diagnostic with a multiline range covering the
following source (and beyond):
indent: 6 (tabs: 0, spaces: 6)
indent: 7 (tabs: 0, spaces: 7)
indent: 8 (tabs: 1, spaces: 0)
indent: 9 (tabs: 1, spaces: 1)
i.e.:
" indent: 6 (tabs: 0, spaces: 6)\n"
" indent: 7 (tabs: 0, spaces: 7)\n"
"\tindent: 8 (tabs: 1, spaces: 0)\n"
"\t indent: 9 (tabs: 1, spaces: 1)\n"
Currently diagnostic_show_locus prints:
indent: 6 (tabs: 0, spaces: 6)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
indent: 7 (tabs: 0, spaces: 7)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
indent: 8 (tabs: 1, spaces: 0)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
indent: 9 (tabs: 1, spaces: 1)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
i.e:
" indent: 6 (tabs: 0, spaces: 6)\n"
" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n"
" indent: 7 (tabs: 0, spaces: 7)\n"
" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n"
" indent: 8 (tabs: 1, spaces: 0)\n"
" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n"
" indent: 9 (tabs: 1, spaces: 1)\n"
" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n"
which misrepresents the indentation of the user's code.
It should respect tabstops, and print:
indent: 6 (tabs: 0, spaces: 6)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
indent: 7 (tabs: 0, spaces: 7)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
indent: 8 (tabs: 1, spaces: 0)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
indent: 9 (tabs: 1, spaces: 1)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
i.e.:
" indent: 6 (tabs: 0, spaces: 6)\n"
" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n"
" indent: 7 (tabs: 0, spaces: 7)\n"
" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n"
" indent: 8 (tabs: 1, spaces: 0)\n"
" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n"
" indent: 9 (tabs: 1, spaces: 1)\n"
" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n"
We should also handle erroneous leading spaces before a tab, so that e.g.
" \tfoo"
should be printed as if it were:
"\tfoo"
(given that that's what the user's editor is probably printing it as).
Similarly, we should presumably print "8" for the column number for the 'f' of
"foo". However, IDEs are expecting GCC's existing behavior, so we should
probably add a command-line option for controlling this.
Adding a left margin with line numbers (as of r263450) doesn't change this bug,
but makes fixing it slightly more complicated.
Maybe:
-fdiagnostics-x-coord=bytes : count of bytes
-fdiagnostics-x-coord=characters : count of characters (not special-casing
tab)
-fdiagnostics-x-coord=columns : count of columns: as per characters, but with
tabs doing tabstops
(currently we use "bytes" Not sure if we need "characters")
I'm thinking that internally, we should continue to track byte offsets, but
make the option affect the presentation of the number in diagnostics*.c.
(should it affect -fdiagnostics-parseable-fixits ?
see also the Emacs RFE for parseable fixits:
https://debbugs.gnu.org/cgi/bugreport.cgi?bug=25987 )
>From gcc-bugs-return-612465-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 09 20:47:58 2018
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Subject: [Bug c++/86905] New: g++ ICE on valid code: verify_cgraph_node failed
Date: Thu, 09 Aug 2018 20:47:00 -0000
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Bug ID: 86905
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Product: gcc
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It appears to be a recent regression. g++-8.1 compiles.
$ g++-trunk -v
Using built-in specs.
COLLECT_GCC=g++-trunk
COLLECT_LTO_WRAPPER=/home/absozero/trunk/root-gcc/libexec/gcc/x86_64-pc-linux-gnu/9.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc/configure --prefix=/home/absozero/trunk/root-gcc
--enable-languages=c,c++ --disable-werror --enable-multilib
Thread model: posix
gcc version 9.0.0 20180809 (experimental) [trunk revision 263445] (GCC)
$ g++-trunk abc.C
abc.C: In function ‘int pthread_equal()’:
abc.C:1:42: warning: no return statement in function returning non-void
[-Wreturn-type]
extern "C" __inline int pthread_equal() {}
^
abc.C: At global scope:
abc.C:3:17: error: comdat-local function called by void b() outside its comdat
void b() { a(); }
^
_ZL1av/1 (int a()) @0x7f1523464420
Type: function definition analyzed alias transparent_alias weakref
Visibility: weak comdat_group:pthread_equal
Same comdat group as: pthread_equal/0
References: pthread_equal/0 (alias)
Referring:
First run: 0
Function flags:
Called by: void b()/2 (can throw external)
Calls:
abc.C:3:17: internal compiler error: verify_cgraph_node failed
0xaf69ec cgraph_node::verify_node()
../../gcc/gcc/cgraph.c:3433
0xaeae8c symtab_node::verify()
../../gcc/gcc/symtab.c:1218
0xaeaf57 symtab_node::verify_symtab_nodes()
../../gcc/gcc/symtab.c:1238
0xafe434 symtab_node::checking_verify_symtab_nodes()
../../gcc/gcc/cgraph.h:625
0xafe434 symbol_table::compile()
../../gcc/gcc/cgraphunit.c:2520
0xb00399 symbol_table::compile()
../../gcc/gcc/cgraphunit.c:2517
0xb00399 symbol_table::finalize_compilation_unit()
../../gcc/gcc/cgraphunit.c:2698
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
$ cat abc.C
extern "C" __inline int pthread_equal() {}
static __typeof(pthread_equal) a __attribute__((__weakref__("pthread_equal")));
void b() { a(); }
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/82700] ICE in printf-return-value with -fexec-charsetëCDIC-US: converting to execution character set: Invalid or incomplete multibyte or wide character
Date: Thu, 09 Aug 2018 21:10:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |bernd.edlinger at hotmail dot de
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
*** Bug 86903 has been marked as a duplicate of this bug. ***
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Subject: [Bug middle-end/86903] ICE in init_target_to_host_charmap
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86903
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Duplicate of pr82700.
*** This bug has been marked as a duplicate of bug 82700 ***
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From: "damian at sourceryinstitute dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/86906] New: erroneous name clash with renaming in use statement
Date: Thu, 09 Aug 2018 21:35:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86906
Bug ID: 86906
Summary: erroneous name clash with renaming in use statement
Product: gcc
Version: 8.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: damian at sourceryinstitute dot org
Target Milestone: ---
gfortran 6.4, 7.3, and 8.2 all produce the error message below when attempting
to use a renamed type while in the same scope as the variable that motivated
the renaming:
$ cat foo.f90
module foo
type config
end type
end module
use foo, only: foo_config => config
contains
subroutine cap
integer config
type(foo_config) extra
end subroutine
end
$ gfortran foo.f90
foo.f90:9:26:
integer config
2
type(foo_config) extra
1
Error: The type ‘config’ cannot be host associated at (1) because it is blocked
by an incompatible object of the same name declared at (2)
$ gfortran --version
GNU Fortran (GCC) 8.2.0
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/86889] s390x gcc build fails when configured with --disable-checking
Date: Thu, 09 Aug 2018 21:59:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86889
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-08-09
Ever confirmed|0 |1
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
Thank you. With the small test case I can confirm the warning even on
x86_64-linux. I've reduced it a tiny bit more. Here's the smaller test case
and the VRP output:
$ cat f.c && gcc -S -O2 -Wall -fdump-tree-vrp=/dev/stdout f.c
struct a { long b[2]; };
int d (struct a *p)
{
int g = 1;
for (; g >= 0; g--)
if (p->b[g])
return g;
__builtin_unreachable ();
}
;; Function d (d, funcdef_no=0, decl_uid=1907, cgraph_uid=1, symbol_order=0)
;; 2 loops found
;;
;; Loop 0
;; header 0, latch 1
;; depth 0, outer -1
;; nodes: 0 1 2 3 4 5
;; 2 succs { 5 3 }
;; 3 succs { 5 4 }
;; 4 succs { 5 }
;; 5 succs { 1 }
SSA replacement table
N_i -> { O_1 ... O_j } means that N_i replaces O_1, ..., O_j
p_9 -> { p_4(D) }
Incremental SSA update started at block: 2
Number of blocks in CFG: 6
Number of blocks to update: 3 ( 50%)
Value ranges after VRP:
_1: VARYING
p_4(D): VARYING
g_5: [0, 1]
_8: VARYING
p_9: ~[0B, 0B] EQUIVALENCES: { p_4(D) } (1 elements)
_11: VARYING
f.c: In function ‘d’:
f.c:8:13: warning: array subscript -1 is below array bounds of ‘long int[2]’
[-Warray-bounds]
8 | if (p->b[g])
| ~~~~^~~
d (struct a * p)
{
int g;
long int _1;
long int _8;
long int _11;
<bb 2> [local count: 357878152]:
_8 = p_4(D)->b[1];
if (_8 != 0)
goto <bb 5>; [33.33%]
else
goto <bb 3>; [66.67%]
<bb 3> [local count: 238597364]:
_11 = p_4(D)->b[0];
if (_11 != 0)
goto <bb 5>; [33.33%]
else
goto <bb 4>; [66.67%]
<bb 4> [local count: 159072864]:
_1 = p_4(D)->b[-1];
<bb 5> [local count: 357878150]:
# g_5 = PHI <-1(4), 1(2), 0(3)>
return g_5;
}
;; Function d (d, funcdef_no=0, decl_uid=1907, cgraph_uid=1, symbol_order=0)
;; 2 loops found
;;
;; Loop 0
;; header 0, latch 1
;; depth 0, outer -1
;; nodes: 0 1 2 3 4
;; 2 succs { 4 3 }
;; 3 succs { 4 }
;; 4 succs { 1 }
SSA replacement table
N_i -> { O_1 ... O_j } means that N_i replaces O_1, ..., O_j
p_2 -> { p_4(D) }
Incremental SSA update started at block: 2
Number of blocks in CFG: 5
Number of blocks to update: 2 ( 40%)
Value ranges after VRP:
_1: [0, +INF]
p_2: ~[0B, 0B] EQUIVALENCES: { p_4(D) } (1 elements)
p_4(D): VARYING
g_5: [0, 1]
_8: VARYING
_9: [0, 1]
_11: VARYING
_12: [-1, 0]
d (struct a * p)
{
int g;
_Bool _1;
long int _8;
int _9;
long int _11;
int _12;
<bb 2> [local count: 357878152]:
_8 = p_4(D)->b[1];
if (_8 != 0)
goto <bb 4>; [33.33%]
else
goto <bb 3>; [66.67%]
<bb 3> [local count: 238597364]:
_11 = p_4(D)->b[0];
_1 = _11 == 0;
_9 = (int) _1;
_12 = -_9;
<bb 4> [local count: 357878150]:
# g_5 = PHI <_12(3), 1(2)>
return g_5;
}
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From: "juergen.reuter at desy dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/86907] New: [9.0 regression] bogus warning "No location in expression near"
Date: Fri, 10 Aug 2018 03:47:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86907
Bug ID: 86907
Summary: [9.0 regression] bogus warning "No location in
expression near"
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: juergen.reuter at desy dot de
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Created attachment 44522
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44522&action=edit
Minimal reproducer for the warning.
In the following example, gfortran from version 9 on (I think 8 was ok) is
issuing a bogus warning:
gfortran -c reproducer.f90
reproducer.f90:30:49:
type(t2), dimension(cmd%n_pass) :: adapt_code
1
Warning: No location in expression near (1)
This is the code:
module m_1
type, public :: t1
private
character(LEN=1), dimension(:), allocatable :: chars
end type t1
end module m_1
!!!!!
module m_2
use m_1, t2 => t1
type :: t3
private
integer :: n_pass = 0
contains
procedure :: execute => t3_execute
end type t3
contains
function eval_string () result (sval)
type(t2) :: sval
end function eval_string
subroutine t3_execute (cmd)
class(t3), intent(inout) :: cmd
!!! Creates a bogus version in gfortran 9.0.0
type(t2), dimension(cmd%n_pass) :: adapt_code
integer :: i
do i = 1, cmd%n_pass
adapt_code(i) = eval_string ()
end do
end subroutine t3_execute
end module m_2
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Subject: [Bug fortran/86907] [9.0 regression] bogus warning "No location in expression near"
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86907
--- Comment #1 from Jürgen Reuter <juergen.reuter at desy dot de> ---
As remark, the renaming of types t2 => t1 is needed to produce the bug, as well
as the components of t1 being allocatable. The used revision of gfortran was
262687.
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Subject: [Bug target/85904] [7/8 Regression] configure issue cross compiling on netbsd, with patch
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--- Comment #9 from sh at gcc dot gnu.org ---
Author: sh
Date: Fri Aug 10 06:27:35 2018
New Revision: 263461
URL: https://gcc.gnu.org/viewcvs?rev=263461&root=gcc&view=rev
Log:
libstdc++-v3: Have aligned_alloc() on Newlib
While building for Newlib, some configure checks must be hard coded.
The aligned_alloc() is supported since 2015 in Newlib.
libstdc++-v3/
PR target/85904
* configure.ac: Define HAVE_ALIGNED_ALLOC if building for
Newlib.
* configure: Regenerate.
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/configure
trunk/libstdc++-v3/configure.ac
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Subject: [Bug target/85904] [7/8 Regression] configure issue cross compiling on netbsd, with patch
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--- Comment #10 from sh at gcc dot gnu.org ---
Author: sh
Date: Fri Aug 10 06:29:58 2018
New Revision: 263462
URL: https://gcc.gnu.org/viewcvs?rev=263462&root=gcc&view=rev
Log:
libstdc++-v3: Have aligned_alloc() on Newlib
While building for Newlib, some configure checks must be hard coded.
The aligned_alloc() is supported since 2015 in Newlib.
libstdc++-v3/
PR target/85904
* configure.ac: Define HAVE_ALIGNED_ALLOC if building for
Newlib.
* configure: Regenerate.
Modified:
branches/gcc-8-branch/libstdc++-v3/ChangeLog
branches/gcc-8-branch/libstdc++-v3/configure
branches/gcc-8-branch/libstdc++-v3/configure.ac
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85904
--- Comment #11 from sh at gcc dot gnu.org ---
Author: sh
Date: Fri Aug 10 06:31:57 2018
New Revision: 263463
URL: https://gcc.gnu.org/viewcvs?rev=263463&root=gcc&view=rev
Log:
libstdc++-v3: Have aligned_alloc() on Newlib
While building for Newlib, some configure checks must be hard coded.
The aligned_alloc() is supported since 2015 in Newlib.
libstdc++-v3/
PR target/85904
* configure.ac: Define HAVE_ALIGNED_ALLOC if building for
Newlib.
* configure: Regenerate.
Modified:
branches/gcc-7-branch/libstdc++-v3/ChangeLog
branches/gcc-7-branch/libstdc++-v3/configure
branches/gcc-7-branch/libstdc++-v3/configure.ac
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Subject: [Bug c++/86905] g++ ICE on valid code: verify_cgraph_node failed
Date: Fri, 10 Aug 2018 09:29:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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CC| |marxin at gcc dot gnu.org
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, it's old, one needs enabled checking. Started with GCC 5.1.0.
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Subject: [Bug c++/86900] -gdwarf-5 -O2 -ffunction-sections = assembler error
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Martin Liška <marxin at gcc dot gnu.org> changed:
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Can you please provide a test-case?
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Subject: [Bug target/86684] ICE in extract_insn, at recog.c:2304 on ppc64le
Date: Fri, 10 Aug 2018 09:32:00 -0000
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--- Comment #6 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Segher Boessenkool from comment #5)
> I cannot reproduce this, not on gcc14 either. I notice you use
> ppc64le-linux,
> while the canonical name is powerpc64le-linux; maybe that matters?
No it does not matter.
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Subject: [Bug tree-optimization/85799] __builin_expect doesn't propagate through inlined functions
Date: Fri, 10 Aug 2018 09:32:00 -0000
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--- Comment #9 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Fri Aug 10 09:31:51 2018
New Revision: 263465
URL: https://gcc.gnu.org/viewcvs?rev=263465&root=gcc&view=rev
Log:
Strip only selected predictors after early tree passes (PR
tree-optimization/85799).
2018-08-10 Martin Liska <mliska@suse.cz>
PR tree-optimization/85799
* passes.def: Add argument for pass_strip_predict_hints.
* predict.c (class pass_strip_predict_hints): Add new argument
early_p.
(strip_predictor_early): New function.
(pass_strip_predict_hints::execute): Call the function to
strip predictors.
(strip_predict_hints): New function.
* predict.def: Fix comment.
2018-08-10 Martin Liska <mliska@suse.cz>
PR tree-optimization/85799
* gcc.dg/pr85799.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/pr85799.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/passes.def
trunk/gcc/predict.c
trunk/gcc/predict.def
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug tree-optimization/85799] __builin_expect doesn't propagate through inlined functions
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #10 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed on trunk.
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Subject: [Bug c++/86900] -gdwarf-5 -O2 -ffunction-sections = assembler error
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--- Comment #2 from Jan Kratochvil <jan.kratochvil at redhat dot com> ---
Created attachment 44523
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44523&action=edit
1.cc.xz
Sorry, the 1.cc file somehow did not get attached.
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Subject: [Bug target/83610] Come up with __builtin_expect_with_probabilty
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--- Comment #7 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Fri Aug 10 09:43:06 2018
New Revision: 263466
URL: https://gcc.gnu.org/viewcvs?rev=263466&root=gcc&view=rev
Log:
Introduce __builtin_expect_with_probability (PR target/83610).
2018-08-10 Martin Liska <mliska@suse.cz>
PR target/83610
* builtin-types.def (BT_FN_LONG_LONG_LONG_DOUBLE): Add new
function type.
* builtins.c (expand_builtin_expect_with_probability):
New function.
(expand_builtin_expect_with_probability): New function.
(build_builtin_expect_predicate): Add new argumnet probability
for BUILT_IN_EXPECT_WITH_PROBABILITY.
(fold_builtin_expect):
(fold_builtin_2):
(fold_builtin_3):
* builtins.def (BUILT_IN_EXPECT_WITH_PROBABILITY):
* builtins.h (fold_builtin_expect): Set new argument.
* doc/extend.texi: Document __builtin_expect_with_probability.
* doc/invoke.texi: Likewise.
* gimple-fold.c (gimple_fold_call): Pass new argument.
* ipa-fnsummary.c (find_foldable_builtin_expect): Handle
also BUILT_IN_EXPECT_WITH_PROBABILITY.
* predict.c (get_predictor_value): New function.
(expr_expected_value): Add new argument probability. Assume
that predictor and probability are always non-null.
(expr_expected_value_1): Likewise. For __builtin_expect and
__builtin_expect_with_probability set probability. Handle
combination in binary expressions.
(tree_predict_by_opcode): Simplify code by simply calling
get_predictor_value.
(pass_strip_predict_hints::execute): Add handling of
BUILT_IN_EXPECT_WITH_PROBABILITY.
* predict.def (PRED_BUILTIN_EXPECT_WITH_PROBABILITY): Add
new predictor.
* tree.h (DECL_BUILT_IN_P): New function.
2018-08-10 Martin Liska <mliska@suse.cz>
PR target/83610
* gcc.dg/predict-17.c: New test.
* gcc.dg/predict-18.c: New test.
* gcc.dg/predict-19.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/predict-17.c
trunk/gcc/testsuite/gcc.dg/predict-18.c
trunk/gcc/testsuite/gcc.dg/predict-19.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/builtin-types.def
trunk/gcc/builtins.c
trunk/gcc/builtins.def
trunk/gcc/builtins.h
trunk/gcc/doc/extend.texi
trunk/gcc/doc/invoke.texi
trunk/gcc/gimple-fold.c
trunk/gcc/ipa-fnsummary.c
trunk/gcc/predict.c
trunk/gcc/predict.def
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree.h
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Subject: Re: [Bug other/86904] New: Column numbers ignore tab characters
To: "dmalcolm at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>, gcc-bugs@gcc.gnu.org
References: <bug-86904-4@http.gcc.gnu.org/bugzilla/>
From: "Richard Earnshaw (lists)" <Richard.Earnshaw@arm.com>
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Date: Fri, 10 Aug 2018 09:43:00 -0000
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On 09/08/18 21:08, dmalcolm at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id†904
>
> Bug ID: 86904
> Summary: Column numbers ignore tab characters
> Product: gcc
> Version: unknown
> Status: UNCONFIRMED
> Keywords: diagnostic
> Severity: normal
> Priority: P3
> Component: other
> Assignee: unassigned at gcc dot gnu.org
> Reporter: dmalcolm at gcc dot gnu.org
> Target Milestone: ---
>
> As noted in https://gcc.gnu.org/bugzilla/show_bug.cgi?id\x19165#c21 :
>
> /* Both gcc and emacs number source *lines* starting at 1, but
> they have differing conventions for *columns*.
>
> GCC uses a 1-based convention for source columns,
> whereas Emacs's M-x column-number-mode uses a 0-based convention.
>
> For example, an error in the initial, left-hand
> column of source line 3 is reported by GCC as:
>
> some-file.c:3:1: error: ...etc...
>
> On navigating to the location of that error in Emacs
> (e.g. via "next-error"),
> the locus is reported in the Mode Line
> (assuming M-x column-number-mode) as:
>
> some-file.c 10% (3, 0)
>
> i.e. "3:1:" in GCC corresponds to "(3, 0)" in Emacs. */
>
> In terms of 0 vs 1, GCC complies with the GNU standards here:
> https://www.gnu.org/prep/standards/html_node/Errors.html
>
> However our "column numbers" are also simply a 1-based byte-count, so a tab
> character is treated by us as simply an increment of 1 right now.
>
> (see also PR 49973, which covers the case of multibyte characters).
>
> It turns out that we convert tab characters to *single* space characters when
> printing source code.
>
> This behavior has been present since Manu first implemented
> -fdiagnostics-show-caret in r186305 (aka
> 5a9830842f69ebb059061e26f8b0699cbd85121e, PR 24985), where it was this logic
> (there in diagnostic.c's diagnostic_show_locus):
> char c = *line == '\t' ? ' ' : *line;
> pp_character (context->printer, c);
>
> (that logic is now in diagnostic-show-locus.c in layout::print_source_line)
>
> This is arguably a bug, but it's intimately linked to the way in which we track
> "column numbers".
>
> Our "column numbers" are currently simply a 1-based byte-count, I believe, so a
> tab character is treated by us as simply an increment of 1 right now.
>
> There are similar issues with encodings that aren't 1 byte per character (e.g.
> non-ASCII unicode characters), which are being tracked in PR 49973.
>
> Presumably, when we print source lines containing tab characters, we should
> emit a number of spaces to reach a tab stop.
>
> Consider a diagnostic with a multiline range covering the
> following source (and beyond):
>
> indent: 6 (tabs: 0, spaces: 6)
> indent: 7 (tabs: 0, spaces: 7)
> indent: 8 (tabs: 1, spaces: 0)
> indent: 9 (tabs: 1, spaces: 1)
>
> i.e.:
>
> " indent: 6 (tabs: 0, spaces: 6)\n"
> " indent: 7 (tabs: 0, spaces: 7)\n"
> "\tindent: 8 (tabs: 1, spaces: 0)\n"
> "\t indent: 9 (tabs: 1, spaces: 1)\n"
>
> Currently diagnostic_show_locus prints:
>
> indent: 6 (tabs: 0, spaces: 6)
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> indent: 7 (tabs: 0, spaces: 7)
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> indent: 8 (tabs: 1, spaces: 0)
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> indent: 9 (tabs: 1, spaces: 1)
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
> i.e:
> " indent: 6 (tabs: 0, spaces: 6)\n"
> " ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n"
> " indent: 7 (tabs: 0, spaces: 7)\n"
> " ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n"
> " indent: 8 (tabs: 1, spaces: 0)\n"
> " ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n"
> " indent: 9 (tabs: 1, spaces: 1)\n"
> " ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n"
>
> which misrepresents the indentation of the user's code.
>
> It should respect tabstops, and print:
>
> indent: 6 (tabs: 0, spaces: 6)
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> indent: 7 (tabs: 0, spaces: 7)
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> indent: 8 (tabs: 1, spaces: 0)
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> indent: 9 (tabs: 1, spaces: 1)
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
> i.e.:
>
> " indent: 6 (tabs: 0, spaces: 6)\n"
> " ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n"
> " indent: 7 (tabs: 0, spaces: 7)\n"
> " ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n"
> " indent: 8 (tabs: 1, spaces: 0)\n"
> " ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n"
> " indent: 9 (tabs: 1, spaces: 1)\n"
> " ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n"
>
> We should also handle erroneous leading spaces before a tab, so that e.g.
>
> " \tfoo"
>
> should be printed as if it were:
>
> "\tfoo"
>
> (given that that's what the user's editor is probably printing it as).
>
> Similarly, we should presumably print "8" for the column number for the 'f' of
> "foo". However, IDEs are expecting GCC's existing behavior, so we should
> probably add a command-line option for controlling this.
>
> Adding a left margin with line numbers (as of r263450) doesn't change this bug,
> but makes fixing it slightly more complicated.
>
> Maybe:
> -fdiagnostics-x-coord=bytes : count of bytes
> -fdiagnostics-x-coord=characters : count of characters (not special-casing
> tab)
> -fdiagnostics-x-coord=columns : count of columns: as per characters, but with
> tabs doing tabstops
how about -fdiagnostics-x-coord=visual-[n]
Where n is the size of a hard tab? Some folks change the tab stop to 4,
for example. Or maybe ...coord=tab[-n], where -n defaults to "-8".
R.
> (currently we use "bytes" Not sure if we need "characters")
>
> I'm thinking that internally, we should continue to track byte offsets, but
> make the option affect the presentation of the number in diagnostics*.c.
>
> (should it affect -fdiagnostics-parseable-fixits ?
> see also the Emacs RFE for parseable fixits:
> https://debbugs.gnu.org/cgi/bugreport.cgi?bug%987 )
>
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