https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103085
Bug ID: 103085
Summary: [12 Regression] -fPIC and -fstack-protector-strong
broken AArch64
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: tnfchris at gcc dot gnu.org
CC: wilco at gcc dot gnu.org
Target Milestone: ---
Target: aarch64-*
-fPIC and -fstack-protector-strong are broken since
g:a195c7270e4705a06a9aaade0d721d5f52ca2275
The following testcase
---
struct A {
int operator*();
void operator++();
friend bool operator!=(A, A);
};
class B {
public:
A begin();
A end();
};
class C {
void emitMaps();
B Events;
};
void C::emitMaps() {
for (auto a : Events)
;
}
----
ICEs with gcc -O2 -g -fstack-protector-strong -fPIC -c -std=c++11
foo.cpp: In member function 'void C::emitMaps()':
foo.cpp:18:1: error: unrecognizable insn:
18 | }
| ^
(insn 4 3 5 2 (set (reg:DI 96)
(const:DI (unspec:DI [
(symbol_ref:DI ("__stack_chk_guard") [flags 0xc0] <var_decl
0xffffb7a96360 __stack_chk_guard>)
(const_int 0 [0])
] UNSPEC_SALT_ADDR))) "foo.cpp":15:20 -1
(nil))
during RTL pass: vregs
foo.cpp:18:1: internal compiler error: in extract_insn, at recog.c:2769
0x750627 _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
../../gcc-fsf/gcc/rtl-error.c:108
0x750653 _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
../../gcc-fsf/gcc/rtl-error.c:116
0x10e332b extract_insn(rtx_insn*)
../../gcc-fsf/gcc/recog.c:2769
0xdf6477 instantiate_virtual_regs_in_insn
../../gcc-fsf/gcc/function.c:1611
0xdf6477 instantiate_virtual_regs
../../gcc-fsf/gcc/function.c:1985
0xdf6477 execute
../../gcc-fsf/gcc/function.c:2034
because the salt address is no longer folded away.
