https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99454
Bug ID: 99454
Summary: internal compiler error: kernel module tg3
tg3_start_xmit
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: ---
Created attachment 50325
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=50325&action=edit
testcase
Compiling kernel 5.10 for x86_64 is resulting in below ICE
=======================
$ x86_64-yoe-linux-musl/x86_64-yoe-linux-musl-gcc -c a.c -O
a.c: In function 'tg3_start_xmit':
a.c:97234:1: error: unrecognizable insn:
97234 | }
| ^
(insn 258 1293 1351 23 (parallel [
(set (reg:SI 0 ax [orig:542 sum ] [542])
(asm_operands:SI (" addl %1, %0
adcl %2, %0
adcl %3, %0
adcl $0, %0
") ("=r") 0 [
(mem:SI (plus:DI (mem/c:DI (plus:DI (reg/f:DI 7 sp)
(const_int 64 [0x40])) [555 %sfp+-32 S8
A64])
(const_int 16 [0x10])) [4 MEM[(struct iphdr
*)_287].daddr+0 S4 A32])
(mem:SI (plus:DI (mem/c:DI (plus:DI (reg/f:DI 7 sp)
(const_int 64 [0x40])) [555 %sfp+-32 S8
A64])
(const_int 12 [0xc])) [4 MEM[(struct iphdr
*)_287].saddr+0 S4 A32])
(const_int 1536 [0x600])
(reg:SI 0 ax [orig:542 sum ] [542])
]
[
(asm_input:SI ("g") a.c:48913)
(asm_input:SI ("g") a.c:48913)
(asm_input:SI ("g") a.c:48913)
(asm_input:SI ("0") a.c:48913)
]
[] a.c:48913))
(clobber (reg:CC 17 flags))
]) "a.c":48913:2 -1
(nil))
during RTL pass: postreload
a.c:97234:1: 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
===============
attached is the preprocessed source
compiler version
gcc version 11.0.1 20210307 (experimental) (GCC)
