https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104923
Bug ID: 104923
Summary: MMA __builtin_mma_disassemble_acc test case ICEs in
LRA
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: bergner at gcc dot gnu.org
Target Milestone: ---
The following two test cases both ICE in LRA with current trunk and GCC11. It
compiles finw with GCC 10:
bergner@rain6p1:~$ cat ice1.c
void
foo (__vector_quad *acc, __vector char *dst, unsigned int n)
{
__vector char a[4];
__builtin_mma_disassemble_acc(a, acc);
dst[2 * n] = a[0];
}
bergner@rain6p1:~$ gcc -S -O2 -mcpu=power10 ice1.c
during RTL pass: reload
ice1.c: In function ‘foo’:
ice1.c:7:1: internal compiler error: in lra_set_insn_recog_data, at lra.cc:1010
7 | }
| ^
0x109a49fb lra_set_insn_recog_data(rtx_insn*)
/home/bergner/gcc/gcc-fsf-mainline-base/gcc/lra.cc:1010
...
bergner@rain6p1:~$ cat ice2.c
void
foo (__vector_quad *acc, __vector char *dst, unsigned int n)
{
__vector char a[4];
__builtin_mma_disassemble_acc(a, acc);
dst[3 * n] = a[0];
}
bergner@rain6p1:~$ gcc -S -O2 -mcpu=power10 ice2.c
during RTL pass: reload
ice2.c: In function ‘foo’:
ice2.c:7:1: internal compiler error: in decompose_normal_address, at
rtlanal.cc:6716
7 | }
| ^
0x10be4b23 decompose_normal_address
/home/bergner/gcc/gcc-fsf-mainline-base/gcc/rtlanal.cc:6716
...
