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* [Bug middle-end/68066] New: [6 Regression]: ICE in max_value, at wide-int.cc
@ 2015-10-23 9:00 ubizjak at gmail dot com
2015-10-23 9:38 ` [Bug middle-end/68066] " rguenth at gcc dot gnu.org
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: ubizjak at gmail dot com @ 2015-10-23 9:00 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68066
Bug ID: 68066
Summary: [6 Regression]: ICE in max_value, at wide-int.cc
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: ubizjak at gmail dot com
Target Milestone: ---
Target: alpha-linux-gnu
Recent regression, FAILs in the testsuite on alpha-linux-gnu:
FAIL: gcc.dg/fold-compare-7.c (internal compiler error)
FAIL: gcc.dg/fold-compare-7.c (test for excess errors)
This failure can be triggered with a crosscompiler to alpha-linux-gnu:
~/gcc-build-alpha/gcc/cc1 -O2 -fpreprocessed -quiet fold-compare-7.c
fold-compare-7.c: In function ‘f’:
fold-compare-7.c:8:1: internal compiler error: in max_value, at wide-int.cc:308
}
^
0xe0c6c8 wi::max_value(unsigned int, signop)
../../gcc-svn/trunk/gcc/wide-int.cc:308
0xdb537c integer_all_onesp(tree_node const*)
../../gcc-svn/trunk/gcc/tree.c:2372
0xdb5452 integer_all_onesp(tree_node const*)
../../gcc-svn/trunk/gcc/tree.c:2364
0xeccbd7 generic_simplify_VEC_COND_EXPR
/home/uros/gcc-build-alpha/gcc/generic-match.c:23341
0x7b4bdb fold_ternary_loc(unsigned int, tree_code, tree_node*, tree_node*,
tree_node*, tree_node*)
../../gcc-svn/trunk/gcc/fold-const.c:11351
0xe292cf gimple_resimplify3(gimple**, code_helper*, tree_node*, tree_node**,
tree_node* (*)(tree_node*))
../../gcc-svn/trunk/gcc/gimple-match-head.c:222
0xe93abd gimple_simplify(gimple*, code_helper*, tree_node**, gimple**,
tree_node* (*)(tree_node*), tree_node* (*)(tree_node*))
../../gcc-svn/trunk/gcc/gimple-match-head.c:718
0x826370 fold_stmt_1
../../gcc-svn/trunk/gcc/gimple-fold.c:3605
0x82740d fold_stmt(gimple_stmt_iterator*, tree_node* (*)(tree_node*))
../../gcc-svn/trunk/gcc/gimple-fold.c:3816
0xbff600 execute
../../gcc-svn/trunk/gcc/tree-ssa-forwprop.c:2326
Please submit a full bug report,
(gdb) bt
#0 internal_error (gmsgid=0x123aab5 "in %s, at %s:%d") at
../../gcc-svn/trunk/gcc/diagnostic.c:1134
#1 0x000000000105dffc in fancy_abort (file=<optimized out>, line=308,
function=0x11af765 <wi::max_value(unsigned int, signop)::__FUNCTION__>
"max_value") at ../../gcc-svn/trunk/gcc/diagnostic.c:1209
#2 0x0000000000e0c6c9 in wi::max_value (precision=308, sgn=<optimized out>) at
../../gcc-svn/trunk/gcc/wide-int.cc:308
#3 0x0000000000db537d in integer_all_onesp (expr=0x2aaaae876b40) at
../../gcc-svn/trunk/gcc/tree.c:2372
#4 0x0000000000db5453 in integer_all_onesp (expr=0x2aaaae886c30) at
../../gcc-svn/trunk/gcc/tree.c:2364
#5 0x0000000000eccbd8 in generic_simplify_VEC_COND_EXPR (loc=0, code=18544485,
type=0x2aaaae889738, op0=0x134, op1=0x2aaaae8869b0,
op2=0x2aaaae886960) at generic-match.c:23341
(gdb) f 2
#2 0x0000000000e0c6c9 in wi::max_value (precision=308, sgn=<optimized out>) at
../../gcc-svn/trunk/gcc/wide-int.cc:308
308 gcc_checking_assert (precision != 0);
(gdb) up
#3 0x0000000000db537d in integer_all_onesp (expr=0x2aaaae876b40) at
../../gcc-svn/trunk/gcc/tree.c:2372
2372 return wi::max_value (TYPE_PRECISION (TREE_TYPE (expr)), UNSIGNED) ==
expr;
(gdb) p debug_generic_expr (expr)
0
$2 = void
(gdb) p debug_tree (expr)
<integer_cst 0x2aaaae876b40 type <boolean_type 0x2aaaae889888> constant 0>
$3 = void
>From gcc-bugs-return-500370-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Oct 23 09:09:06 2015
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From: "ishiura-compiler at ml dot kwansei.ac.jp" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/68067] New: Wrong constant folding
Date: Fri, 23 Oct 2015 09:09:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?idh067
Bug ID: 68067
Summary: Wrong constant folding
Product: gcc
Version: trans-mem
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: ishiura-compiler at ml dot kwansei.ac.jp
Target Milestone: ---
GCC-6.0.0 miscompiles the following code.
GCC-4.3.6 or later versions miscompile too.
$cat error.c
int main(void) {
int a = -1;
static int b = -2147483647 - 1;
static int c = 0;
int t = a - (b - c);
if (t != 2147483647) { __builtin_abort(); }
return 0;
}
$gcc-6.0 error.c -O3 && ./a.out
[1] 25603 abort (core dumped) ./a.out
$gcc-6.0 -v
Using built-in specs.
COLLECT_GCC=gcc-6.0
COLLECT_LTO_WRAPPER=$HOME/opt/gcc-6.0.0/libexec/gcc/x86_64-pc-linux-gnu/6.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc/configure --prefix=$HOME/opt/gcc-6.0.0
--enable-languages=c --disable-multilib --program-suffix=-6.0
Thread model: posix
gcc version 6.0.0 20151022 (experimental) (GCC)
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug middle-end/68066] [6 Regression]: ICE in max_value, at wide-int.cc
2015-10-23 9:00 [Bug middle-end/68066] New: [6 Regression]: ICE in max_value, at wide-int.cc ubizjak at gmail dot com
@ 2015-10-23 9:38 ` rguenth at gcc dot gnu.org
2015-10-23 9:47 ` ienkovich at gcc dot gnu.org
` (3 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: rguenth at gcc dot gnu.org @ 2015-10-23 9:38 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68066
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ienkovich at gcc dot gnu.org
Target Milestone|--- |6.0
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Hmm, the boolean type shouldn't have precision 0. Ilya?
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug middle-end/68066] [6 Regression]: ICE in max_value, at wide-int.cc
2015-10-23 9:00 [Bug middle-end/68066] New: [6 Regression]: ICE in max_value, at wide-int.cc ubizjak at gmail dot com
2015-10-23 9:38 ` [Bug middle-end/68066] " rguenth at gcc dot gnu.org
@ 2015-10-23 9:47 ` ienkovich at gcc dot gnu.org
2015-10-23 13:38 ` ienkovich at gcc dot gnu.org
` (2 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: ienkovich at gcc dot gnu.org @ 2015-10-23 9:47 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68066
--- Comment #2 from Ilya Enkovich <ienkovich at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #1)
> Hmm, the boolean type shouldn't have precision 0. Ilya?
Yep. I sent a patch to fix it.
https://gcc.gnu.org/ml/gcc-patches/2015-10/msg02298.html
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug middle-end/68066] [6 Regression]: ICE in max_value, at wide-int.cc
2015-10-23 9:00 [Bug middle-end/68066] New: [6 Regression]: ICE in max_value, at wide-int.cc ubizjak at gmail dot com
2015-10-23 9:38 ` [Bug middle-end/68066] " rguenth at gcc dot gnu.org
2015-10-23 9:47 ` ienkovich at gcc dot gnu.org
@ 2015-10-23 13:38 ` ienkovich at gcc dot gnu.org
2015-10-27 16:09 ` vries at gcc dot gnu.org
2015-10-27 16:22 ` ienkovich at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: ienkovich at gcc dot gnu.org @ 2015-10-23 13:38 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68066
--- Comment #3 from Ilya Enkovich <ienkovich at gcc dot gnu.org> ---
Author: ienkovich
Date: Fri Oct 23 13:38:16 2015
New Revision: 229256
URL: https://gcc.gnu.org/viewcvs?rev=229256&root=gcc&view=rev
Log:
gcc/
PR middle-end/68066
* tree.c (build_truth_vector_type): Support BLK mode
returned for boolean vector.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/tree.c
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug middle-end/68066] [6 Regression]: ICE in max_value, at wide-int.cc
2015-10-23 9:00 [Bug middle-end/68066] New: [6 Regression]: ICE in max_value, at wide-int.cc ubizjak at gmail dot com
` (2 preceding siblings ...)
2015-10-23 13:38 ` ienkovich at gcc dot gnu.org
@ 2015-10-27 16:09 ` vries at gcc dot gnu.org
2015-10-27 16:22 ` ienkovich at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: vries at gcc dot gnu.org @ 2015-10-27 16:09 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68066
vries at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2015-10-27
CC| |vries at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |ienkovich at gcc dot gnu.org
Ever confirmed|0 |1
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug middle-end/68066] [6 Regression]: ICE in max_value, at wide-int.cc
2015-10-23 9:00 [Bug middle-end/68066] New: [6 Regression]: ICE in max_value, at wide-int.cc ubizjak at gmail dot com
` (3 preceding siblings ...)
2015-10-27 16:09 ` vries at gcc dot gnu.org
@ 2015-10-27 16:22 ` ienkovich at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: ienkovich at gcc dot gnu.org @ 2015-10-27 16:22 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68066
--- Comment #4 from Ilya Enkovich <ienkovich at gcc dot gnu.org> ---
Was it fixed by the patch?
^ permalink raw reply [flat|nested] 6+ messages in thread
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2015-10-23 9:00 [Bug middle-end/68066] New: [6 Regression]: ICE in max_value, at wide-int.cc ubizjak at gmail dot com
2015-10-23 9:38 ` [Bug middle-end/68066] " rguenth at gcc dot gnu.org
2015-10-23 9:47 ` ienkovich at gcc dot gnu.org
2015-10-23 13:38 ` ienkovich at gcc dot gnu.org
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