https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104132
Bug ID: 104132
Summary: OpenACC 'kernels' decomposition: internal compiler
error: verify_gimple failed, error: non-register as
LHS of binary operation
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code, openacc
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: tschwinge at gcc dot gnu.org
CC: asolokha at gmx dot com, pinskia at gcc dot gnu.org
Target Milestone: ---
As Andrew Pinski posted in
<https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104061#c3>:
int arr_0;
void
foo (void)
{
#pragma acc kernels
{
int k;
#pragma acc loop
for (k = 0; k < 2; k++)
arr_0 = k;
#pragma acc loop
for (k = 0; k < 2; k++)
arr_0 = k;
}
}
(Note 'arr_0 = k;', not 'arr_0 += k;' as originally in PR104061.)
Already with '-fopenacc --param openacc-kernels=decompose -O0 -g0' (so, not
involving 'GIMPLE_DEBUG's), for both C and C++, we run into:
pr.c: In function ‘foo._omp_fn.1’:
pr.c:40:1: error: non-register as LHS of binary operation
40 | }
| ^
k = 0 + .offset.18;
pr.c:40:1: error: non-register as LHS of binary operation
k = 0 + 2;
during IPA pass: *free_lang_data
pr.c:40:1: internal compiler error: verify_gimple failed
