[Bug bootstrap/92301] bootstrap internal compiler error: Aborted free(): invalid next size (fast)
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92301
--- Comment #8 from Martin Liška ---
Simplified a bit more:
$ cat /tmp/vect.c
unsigned int m;
#define N 128
unsigned int a[N];
unsigned int
__attribute__((noipa))
df_count_refs (bool include_defs)
{
int size = 0;
for (unsigned int regno = 0; regno < m; regno++)
if (include_defs)
size += a[regno];
return size;
}
int main(int argc, char **argv)
{
for (unsigned i = 0; i < N; i++)
a[i] = i;
if (argc == 1)
m = 17;
unsigned int r = df_count_refs(true);
__builtin_printf ("r: %d\n", r);
if (r != 136)
__builtin_abort ();
return 0;
}
$ g++ /tmp/vect.c -march=haswell -O3 && ./a.out
r: 17
Aborted (core dumped)
[Bug bootstrap/92301] bootstrap internal compiler error: Aborted free(): invalid next size (fast)
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92301
--- Comment #7 from Martin Liška ---
Even easier, use the following self-contained test-case:
$ cat /tmp/vect.c
unsigned int m;
struct df_reg_info
{
unsigned int n_regs;
};
#define N 128
struct df_reg_info a[N];
unsigned int
__attribute__((noipa))
df_count_refs (bool include_defs)
{
unsigned int regno;
int size = 0;
for (regno = 0; regno < m; regno++)
{
if (include_defs)
size += a[regno].n_regs;
}
return size;
}
int main(int argc, char **argv)
{
for (unsigned i = 0; i < N; i++)
{
a[i].n_regs = i;
}
if (argc == 1)
m = 17;
unsigned int r = df_count_refs(true);
__builtin_printf ("r: %d\n", r);
if (r != 136)
__builtin_abort ();
return 0;
}
$ marxin@marxinbox:/dev/shm/objdir/gcc> g++ /tmp/vect.c -march=haswell -O0 &&
./a.out
r: 136
marxin@marxinbox:/dev/shm/objdir/gcc> g++ /tmp/vect.c -march=haswell -O3 &&
./a.out
r: 17
Aborted (core dumped)
[Bug bootstrap/92301] bootstrap internal compiler error: Aborted free(): invalid next size (fast)
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92301 --- Comment #6 from Martin Liška --- Easier way how to bisect that is to use only these dbg-cnt options: -O3 -march=haswell -fdbg-cnt=vect_slp:0 -fdbg-cnt=vect_loop:3 which is first bad, vect_loop:2 is fine.
[Bug bootstrap/92301] bootstrap internal compiler error: Aborted free(): invalid next size (fast)
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92301 --- Comment #5 from Martin Liška --- > 3) build df-scan.o with -O3 -march=skylake same happens for -march=haswell.
[Bug bootstrap/92301] bootstrap internal compiler error: Aborted free(): invalid next size (fast)
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92301
--- Comment #4 from Martin Liška ---
Created attachment 47145
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47145=edit
Reproduce patch
Ok, steps to reproduce that:
1) install latest GCC trunk and use it as compiler
2) apply the patch
3) build df-scan.o with -O3 -march=skylake
4) echo 'int foo() {}' | ./xgcc -B. -x c -g -O2 -
during RTL pass: stv
: In function ‘foo’:
:1:1: internal compiler error: in df_reorganize_refs_by_reg_by_reg, at
df-scan.c:1350
0x620205 df_reorganize_refs_by_reg_by_reg
/home/marxin/Programming/gcc/gcc/df-scan.c:1350
0x9cbac4 df_reorganize_refs_by_reg
/home/marxin/Programming/gcc/gcc/df-scan.c:1563
0x9cbac4 df_maybe_reorganize_def_refs(df_ref_order)
/home/marxin/Programming/gcc/gcc/df-scan.c:1717
0x9c077f df_rd_local_compute
/home/marxin/Programming/gcc/gcc/df-problems.c:401
0x9ba6a1 df_analyze_problem(dataflow*, bitmap_head*, int*, int)
/home/marxin/Programming/gcc/gcc/df-core.c:1170
0x9ba799 df_analyze_1
/home/marxin/Programming/gcc/gcc/df-core.c:1227
0x1160cfa convert_scalars_to_vector
/home/marxin/Programming/gcc/gcc/config/i386/i386-features.c:1621
0x1160cfa execute
/home/marxin/Programming/gcc/gcc/config/i386/i386-features.c:1909
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See
[Bug bootstrap/92301] bootstrap internal compiler error: Aborted free(): invalid next size (fast)
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92301 --- Comment #3 from Martin Liška --- One can reproduce that by using df-scan.o from stage2 and libgcc ICEs with -g.
[Bug bootstrap/92301] bootstrap internal compiler error: Aborted free(): invalid next size (fast)
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92301 Martin Liška changed: What|Removed |Added Status|ASSIGNED|NEW Assignee|marxin at gcc dot gnu.org |unassigned at gcc dot gnu.org
[Bug bootstrap/92301] bootstrap internal compiler error: Aborted free(): invalid next size (fast)
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92301 Martin Liška changed: What|Removed |Added Keywords|needs-bisection | CC||rguenth at gcc dot gnu.org --- Comment #2 from Martin Liška --- If I see correctly, it's caused by r277566.
[Bug bootstrap/92301] bootstrap internal compiler error: Aborted free(): invalid next size (fast)
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92301 Martin Liška changed: What|Removed |Added Status|NEW |ASSIGNED Assignee|unassigned at gcc dot gnu.org |marxin at gcc dot gnu.org
[Bug bootstrap/92301] bootstrap internal compiler error: Aborted free(): invalid next size (fast)
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92301 Martin Liška changed: What|Removed |Added Status|UNCONFIRMED |NEW Last reconfirmed||2019-10-31 Ever confirmed|0 |1 --- Comment #1 from Martin Liška --- I see the problem as well with a bit different back-trace. I'll work on that.
