https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99567
Bug ID: 99567
Summary: internal error in extract_constrain_insn with
asan-stack
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: arnd at linaro dot org
Target Milestone: ---
I ran into an internal compiler error while building linux kernels with the
kernel address sanitizer. Reduced it to this test case:
$ gcc-11 --version
gcc-11 (Ubuntu 11-20210306-1ubuntu1) 11.0.1 20210306 (experimental) [master
revision 574e7601829:6b84c9062bc:84185598dc7470bad4e7f8c22b64e3c944efb670]
$ cat tcp_ipv4.i
enum { a };
struct b {
short c;
};
int d(void);
void e(int, _Bool *);
void f(struct b *, int *);
void g(struct b *h) {
int i, l;
volatile char j;
struct b k = *h;
void *m = h + k.c;
l = *(int *)m;
asm("" : : "g"(l));
lookup:
i = j;
int n = d();
_Bool o = a;
if (i)
f(h, m);
e(n, &o);
goto lookup;
}
$ gcc-11 -fno-omit-frame-pointer -fsanitize=address --param
asan-instrumentation-with-call-threshold=10000 --param asan-stack=1 -c -O2
-Wall tcp_ipv4.i
tcp_ipv4.i: In function ‘g’:
tcp_ipv4.i:23:1: error: unrecognizable insn:
23 | }
| ^
(insn 84 83 160 10 (parallel [
(asm_operands/v ("") ("") 0 [
(mem:SI (mem/c:DI (plus:DI (reg/f:DI 6 bp)
(const_int -192 [0xffffffffffffff40])) [9
%sfp+-144 S8 A64]) [1 MEM[(int *)m_8]+0 S4 A32])
]
[
(asm_input:SI ("g") tcp_ipv4.i:14)
]
[] tcp_ipv4.i:14)
(clobber (reg:CC 17 flags))
]) "tcp_ipv4.i":14:3 -1
(nil))
during RTL pass: reload
tcp_ipv4.i:23:1: internal compiler error: in extract_constrain_insn, at
recog.c:2670
0xce2eb1 _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
../../src/gcc/rtl-error.c:108
0xce3057 _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
../../src/gcc/rtl-error.c:116
0x95f537 extract_constrain_insn(rtx_insn*)
../../src/gcc/recog.c:2670
0x95f537 extract_constrain_insn(rtx_insn*)
../../src/gcc/recog.c:2666
0x95f537 check_rtl
../../src/gcc/lra.c:2087
0x17962bc lra(_IO_FILE*)
../../src/gcc/lra.c:2505
0x1794579 do_reload
../../src/gcc/ira.c:5827
0x1794579 execute
../../src/gcc/ira.c:6013
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <file:///usr/share/doc/gcc-11/README.Bugs> for instructions.
So far this only happened on x86 targets.
