https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102118
Bug ID: 102118
Summary: ice in merge, at ipa-modref-tree.h:203
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: dcb314 at hotmail dot com
Target Milestone: ---
For this C code:
typedef struct {
int large_page_addr;
long n_used_entries
} CPUTLBDesc;
typedef struct {
long mask
} CPUTLBDescFast;
typedef struct {
CPUTLBDesc d[8];
CPUTLBDescFast f[]
} CPUTLB;
typedef int RISCVCPU;
CPUTLB *tlb_flush_page_bits_locked___trans_tmp_8,
*tlb_flush_page_bits_locked___trans_tmp_6,
*tlb_flush_page_bits_locked___trans_tmp_4;
void tlb_flush_page_bits_locked(int *env, int midx) {
{
int *__trans_tmp_5 = env;
{
RISCVCPU *arch_cpu = __trans_tmp_5;
tlb_flush_page_bits_locked___trans_tmp_4 = arch_cpu;
}
}
CPUTLBDesc *d = &tlb_flush_page_bits_locked___trans_tmp_4->d[midx];
{
int *__trans_tmp_7 = env;
{
RISCVCPU *arch_cpu = __trans_tmp_7;
tlb_flush_page_bits_locked___trans_tmp_6 = arch_cpu;
}
}
if (tlb_flush_page_bits_locked___trans_tmp_6->f[midx].mask)
if (d->large_page_addr) {
int *__trans_tmp_3 = env;
{
{
RISCVCPU *arch_cpu = __trans_tmp_3;
tlb_flush_page_bits_locked___trans_tmp_8 = arch_cpu;
}
tlb_flush_page_bits_locked___trans_tmp_8->d[midx].n_used_entries--;
}
}
}
compiled by recent gcc trunk and compiler flag -O1, does this:
during GIMPLE pass: modref
bug752.c: In function ‘tlb_flush_page_bits_locked’:
bug752.c:43:1: internal compiler error: in merge, at ipa-modref-tree.h:203
43 | }
| ^
0xae7448 modref_access_node::merge(modref_access_node const&, bool)
../../trunk.git/gcc/ipa-modref-tree.h:203
The code was fine at git hash 3ac6b5cff1eca4e1 and broken at hash
e28ac73af20028f8
