[Bug target/100626] [11/12 Regression] ICE Segmentation fault (during RTL pass: split1) since r11-165-geb72dc663e9070b2
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100626 Uroš Bizjak changed: What|Removed |Added Status|ASSIGNED|RESOLVED Resolution|--- |FIXED Target|x86_64-linux-gnu|x86 |i?86-linux-gnu | --- Comment #8 from Uroš Bizjak --- Fixed.
[Bug target/100626] [11/12 Regression] ICE Segmentation fault (during RTL pass: split1) since r11-165-geb72dc663e9070b2
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100626 --- Comment #7 from CVS Commits --- The releases/gcc-11 branch has been updated by Uros Bizjak : https://gcc.gnu.org/g:6be2c12e37b167890d68587086a2186358b64c02 commit r11-8468-g6be2c12e37b167890d68587086a2186358b64c02 Author: Uros Bizjak Date: Tue May 18 15:45:54 2021 +0200 i386: Fix split_double_mode with paradoxical subreg [PR100626] split_double_mode calls simplify_gen_subreg, which fails for the high half of the paradoxical subreg. Return temporary register instead of NULL RTX in this case. 2021-05-18 Uroš Bizjak gcc/ PR target/100626 * config/i386/i386-expand.c (split_double_mode): Return temporary register when simplify_gen_subreg fails with the high half od the paradoxical subreg. (cherry picked from commit d39fbed75810fc7478842503ecb0268b85dc9c2e)
[Bug target/100626] [11/12 Regression] ICE Segmentation fault (during RTL pass: split1) since r11-165-geb72dc663e9070b2
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100626 --- Comment #6 from CVS Commits --- The master branch has been updated by Uros Bizjak : https://gcc.gnu.org/g:d39fbed75810fc7478842503ecb0268b85dc9c2e commit r12-878-gd39fbed75810fc7478842503ecb0268b85dc9c2e Author: Uros Bizjak Date: Tue May 18 15:45:54 2021 +0200 i386: Fix split_double_mode with paradoxical subreg [PR100626] split_double_mode calls simplify_gen_subreg, which fails for the high half of the paradoxical subreg. Return temporary register instead of NULL RTX in this case. 2021-05-18 Uroš Bizjak gcc/ PR target/100626 * config/i386/i386-expand.c (split_double_mode): Return temporary register when simplify_gen_subreg fails with the high half od the paradoxical subreg.
[Bug target/100626] [11/12 Regression] ICE Segmentation fault (during RTL pass: split1) since r11-165-geb72dc663e9070b2
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100626 Uroš Bizjak changed: What|Removed |Added Assignee|unassigned at gcc dot gnu.org |ubizjak at gmail dot com Status|NEW |ASSIGNED --- Comment #5 from Uroš Bizjak --- Created attachment 50828 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=50828=edit Proposed patch Patch in testing.
[Bug target/100626] [11/12 Regression] ICE Segmentation fault (during RTL pass: split1) since r11-165-geb72dc663e9070b2
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100626
--- Comment #4 from Haoxin Tu ---
I found that it also crashes (under -O1 and -Os) on today's trunk version of
GCC.
$cat small.c
#include
int a;
void b() {
int c;
uint64_t *d =
uint8_t *e;
if (a)
*d &= *e;
if (*d)
for (;;)
;
}
$gcc -w -O1 -m32 small.c (or -Os)
during RTL pass: split1
small.c: In function ‘b’:
small.c:12:1: internal compiler error: Segmentation fault
12 | }
| ^
0xba0cef crash_signal
../../gcc/toplev.c:327
0xefc40a ix86_fixup_binary_operands(rtx_code, machine_mode, rtx_def**)
../../gcc/config/i386/i386-expand.c:900
0xefc5bb ix86_expand_binary_operator(rtx_code, machine_mode, rtx_def**)
../../gcc/config/i386/i386-expand.c:943
0x1214538 gen_andsi3(rtx_def*, rtx_def*, rtx_def*)
../../gcc/config/i386/i386.md:9091
0x12147b4 gen_split_191(rtx_insn*, rtx_def**)
../../gcc/config/i386/i386.md:9123
0x13f8f22 split_insns(rtx_def*, rtx_insn*)
../../gcc/config/i386/i386.md:14140
0x87e61e try_split(rtx_def*, rtx_insn*, int)
../../gcc/emit-rtl.c:3786
0xb15ad1 split_insn
../../gcc/recog.c:3363
0xb1af47 split_all_insns()
../../gcc/recog.c:3467
0xb1afd8 execute
../../gcc/recog.c:4385
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
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[Bug target/100626] [11/12 Regression] ICE Segmentation fault (during RTL pass: split1) since r11-165-geb72dc663e9070b2
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100626 Richard Biener changed: What|Removed |Added Priority|P3 |P2
[Bug target/100626] [11/12 Regression] ICE Segmentation fault (during RTL pass: split1) since r11-165-geb72dc663e9070b2
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100626 --- Comment #3 from Uroš Bizjak --- *di3_doubleword calls split_double_mode with: op0: (subreg:DI (reg/v:SI 89 [ li_18 ]) 0) op1: (reg:DI 90 [ uc_4 ]) op2: (mem/c:DI (plus:SI (reg/f:SI 19 frame) (const_int -4 [0xfffc])) [0 S8 A32]) and split_double_mode chokes on paradoxical subreg op0, returning (nil) on highpart of op0: (reg/v:SI 89 [ li_18 ]) (subreg:SI (reg:DI 90 [ uc_4 ]) 0) (mem/c:SI (plus:SI (reg/f:SI 19 frame) (const_int -4 [0xfffc])) [0 S4 A32]) (nil) (subreg:SI (reg:DI 90 [ uc_4 ]) 4) (mem/c:SI (reg/f:SI 19 frame) [0 S4 A32])
[Bug target/100626] [11/12 Regression] ICE Segmentation fault (during RTL pass: split1) since r11-165-geb72dc663e9070b2
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100626 Jakub Jelinek changed: What|Removed |Added CC||jakub at gcc dot gnu.org Target Milestone|--- |11.2
[Bug target/100626] [11/12 Regression] ICE Segmentation fault (during RTL pass: split1) since r11-165-geb72dc663e9070b2
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100626 Martin Liška changed: What|Removed |Added Last reconfirmed||2021-05-17 CC||marxin at gcc dot gnu.org, ||rguenth at gcc dot gnu.org Status|UNCONFIRMED |NEW Summary|ICE Segmentation fault |[11/12 Regression] ICE |(during RTL pass: split1) |Segmentation fault (during ||RTL pass: split1) since ||r11-165-geb72dc663e9070b2 Ever confirmed|0 |1 --- Comment #2 from Martin Liška --- Started with r11-165-geb72dc663e9070b2.
