https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99455
Bug ID: 99455
Summary: internal compiler error: In function
'prb_reserve_in_last' in linux kernel
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: raj.khem at gmail dot com
Target Milestone: ---
compiling attached source with -Os causes the ICE, it works ok with -O1 or -O2
=========================
$ x86_64-yoe-linux-musl-gcc -Os b.c -c
b.c:21245:1: error: unrecognizable insn:
21245 | }
| ^
(insn 58 57 446 6 (parallel [
(asm_operands/v ("push %0 ; popf") ("") 0 [
(mem:DI (plus:DI (mem/c:DI (plus:DI (reg/f:DI 7 sp)
(const_int 8 [0x8])) [27 %sfp+-72 S8 A64])
(const_int 8 [0x8])) [16 e_56(D)->irqflags+0 S8
A64])
]
[
(asm_input:DI ("g") b.c:9370)
]
[] b.c:9370)
(clobber (mem:BLK (scratch) [0 A8]))
(clobber (reg:CC 17 flags))
]) "b.c":9370:2 -1
(nil))
during RTL pass: postreload
b.c:21245:1: internal compiler error: in extract_constrain_insn, at
recog.c:2670
0x1564e08 internal_error(char const*, ...)
???:0
0x60277f fancy_abort(char const*, int, char const*)
???:0
0x5dddbe _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
???:0
0x5dddda _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
???:0
==============================
gcc version 11.0.1 20210307 (experimental) (GCC)
