https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102429
Bug ID: 102429
Summary: nvptx: ICE with expand_GOMP_SIMT_XCHG_BFLY : in
expand_insn, at optabs.c:7947
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: burnus at gcc dot gnu.org
CC: vries at gcc dot gnu.org
Target Milestone: ---
Created attachment 51490
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=51490&action=edit
testcase, compile with nvptx offloading enabled with: gfortran -fopenmp -O1
That's with several OvO Fortran testcases, the smallest is:
https://github.com/TApplencourt/OvO/blob/master/test_src/fortran/hierarchical_parallelism/reduction_add-double_complex/target_simd.F90
The testcase (also attached) fails with:
gfortran -fopenmp example.f90 -O1
with:
during RTL pass: expand
example.f90: In function 'MAIN__._omp_fn.0':
example.f90:23:32: internal compiler error: in expand_insn, at optabs.c:7947
23 | counter_N0 = counter_N0 + 1.
| ^
0xb21933 expand_insn(insn_code, unsigned int, expand_operand*)
/net/build5-trusty-cs.sje.mentorg.com/scratch/tburnus/openacc.x86_64-linux-gnu-openacc-mainline/src/gcc-mainline/gcc/optabs.c:7947
0x9761ad expand_GOMP_SIMT_XCHG_BFLY
/net/build5-trusty-cs.sje.mentorg.com/scratch/tburnus/openacc.x86_64-linux-gnu-openacc-mainline/src/gcc-mainline/gcc/internal-fn.c:375
0x700897 expand_call_stmt
Namely:
expand_insn (icode=CODE_FOR_omp_simt_xchg_bfly, nops=nops@entry=3,
ops=ops@entry=0x7fffffffda80)
fails at:
7946 if (!maybe_expand_insn (icode, nops, ops))
7947 gcc_unreachable ();
(gdb) p *ops
$4 = {type = EXPAND_OUTPUT, unsigned_p = 0, target = 0, unused = 0, mode =
E_DCmode, value = 0x7ffff73fcc78, int_value = {<poly_int_pod<1u, long>> =
{coeffs = {0}}, <No data fields>}}
