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[Bug rtl-optimization/66412] New: ICE on valid code at -O2 and -O3 with -g enabled in simplify_subreg, at simplify-rtx.c:5748
- From: "su at cs dot ucdavis.edu" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Thu, 04 Jun 2015 04:50:19 +0000
- Subject: [Bug rtl-optimization/66412] New: ICE on valid code at -O2 and -O3 with -g enabled in simplify_subreg, at simplify-rtx.c:5748
- Auto-submitted: auto-generated
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66412
Bug ID: 66412
Summary: ICE on valid code at -O2 and -O3 with -g enabled in
simplify_subreg, at simplify-rtx.c:5748
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: su at cs dot ucdavis.edu
Target Milestone: ---
The following code causes an ICE when compiled with the current gcc trunk at
-O2 and -O3 with -g enabled on x86_64-linux-gnu in both 32-bit and 64-bit
modes.
This is a regression from 4.9.x.
$ gcc-trunk -v
Using built-in specs.
COLLECT_GCC=gcc-trunk
COLLECT_LTO_WRAPPER=/usr/local/gcc-trunk/libexec/gcc/x86_64-unknown-linux-gnu/6.0.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: ../gcc-trunk/configure --prefix=/usr/local/gcc-trunk
--enable-languages=c,c++ --disable-werror --enable-multilib
Thread model: posix
gcc version 6.0.0 20150603 (experimental) [trunk revision 224056] (GCC)
$
$ gcc-trunk -O2 -c small.c
$ gcc-trunk -Os -g -c small.c
$ gcc-4.9.2 -O2 -g -c small.c
$
$ gcc-trunk -O2 -g -c small.c
small.c: In function âfn1â:
small.c:12:1: internal compiler error: in simplify_subreg, at
simplify-rtx.c:5743
}
^
0xae6809 simplify_subreg(machine_mode, rtx_def*, machine_mode, unsigned int)
../../gcc-trunk/gcc/simplify-rtx.c:5742
0xae6bf9 simplify_gen_subreg(machine_mode, rtx_def*, machine_mode, unsigned
int)
../../gcc-trunk/gcc/simplify-rtx.c:5962
0xae9176 simplify_replace_fn_rtx(rtx_def*, rtx_def const*, rtx_def*
(*)(rtx_def*, rtx_def const*, void*), void*)
../../gcc-trunk/gcc/simplify-rtx.c:524
0xd9b7ef propagate_for_debug(rtx_insn*, rtx_insn*, rtx_def*, rtx_def*,
basic_block_def*)
../../gcc-trunk/gcc/valtrack.c:210
0x106d801 try_combine
../../gcc-trunk/gcc/combine.c:4399
0x1071301 combine_instructions
../../gcc-trunk/gcc/combine.c:1324
0x1071301 rest_of_handle_combine
../../gcc-trunk/gcc/combine.c:14326
0x1071301 execute
../../gcc-trunk/gcc/combine.c:14369
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
$
-----------------------------------------
int a, b, c, d;
void
fn1 ()
{
short e;
for (c = 0; c < 1; c++)
d = 0;
unsigned short g = ((a == 0) ^ d) % 8;
e = g << 1;
b = e && 1;
}
- Follow-Ups:
- [Bug rtl-optimization/66412] [5/6 Regression] ICE on valid code at -O2 and -O3 with -g enabled in simplify_subreg, at simplify-rtx.c:5748
- From: jakub at gcc dot gnu.org
- [Bug rtl-optimization/66412] [5/6 Regression] ICE on valid code at -O2 and -O3 with -g enabled in simplify_subreg, at simplify-rtx.c:5748
- From: rguenth at gcc dot gnu.org
- [Bug rtl-optimization/66412] [5/6 Regression] ICE on valid code at -O2 and -O3 with -g enabled in simplify_subreg, at simplify-rtx.c:5748
- From: ubizjak at gmail dot com
- [Bug rtl-optimization/66412] [5/6 Regression] ICE on valid code at -O2 and -O3 with -g enabled in simplify_subreg, at simplify-rtx.c:5748
- From: ubizjak at gmail dot com
- [Bug rtl-optimization/66412] [5/6 Regression] ICE on valid code at -O2 and -O3 with -g enabled in simplify_subreg, at simplify-rtx.c:5748
- From: ubizjak at gmail dot com
- [Bug rtl-optimization/66412] [5/6 Regression] ICE on valid code at -O2 and -O3 with -g enabled in simplify_subreg, at simplify-rtx.c:5748
- From: jakub at gcc dot gnu.org
- [Bug rtl-optimization/66412] [5/6 Regression] ICE on valid code at -O2 and -O3 with -g enabled in simplify_subreg, at simplify-rtx.c:5748
- From: ubizjak at gmail dot com
- [Bug rtl-optimization/66412] [5/6 Regression] ICE on valid code at -O2 and -O3 with -g enabled in simplify_subreg, at simplify-rtx.c:5748
- From: ubizjak at gmail dot com
- [Bug rtl-optimization/66412] [5/6 Regression] ICE on valid code at -O2 and -O3 with -g enabled in simplify_subreg, at simplify-rtx.c:5748
- From: segher at gcc dot gnu.org
- [Bug rtl-optimization/66412] [5/6 Regression] ICE on valid code at -O2 and -O3 with -g enabled in simplify_subreg, at simplify-rtx.c:5748
- From: uros at gcc dot gnu.org
- [Bug rtl-optimization/66412] [5/6 Regression] ICE on valid code at -O2 and -O3 with -g enabled in simplify_subreg, at simplify-rtx.c:5748
- From: uros at gcc dot gnu.org
- [Bug rtl-optimization/66412] [5/6 Regression] ICE on valid code at -O2 and -O3 with -g enabled in simplify_subreg, at simplify-rtx.c:5748
- From: uros at gcc dot gnu.org
- [Bug target/66412] [5/6 Regression] ICE on valid code at -O2 and -O3 with -g enabled in simplify_subreg, at simplify-rtx.c:5748
- From: ubizjak at gmail dot com