diff options
Diffstat (limited to 'gcc/tree-parloops.c')
| -rw-r--r-- | gcc/tree-parloops.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/gcc/tree-parloops.c b/gcc/tree-parloops.c index 2390d9e..ec41834 100644 --- a/gcc/tree-parloops.c +++ b/gcc/tree-parloops.c @@ -2050,13 +2050,17 @@ create_parallel_loop (struct loop *loop, tree loop_fn, tree data, !gsi_end_p (gpi); gsi_next (&gpi)) { source_location locus; - tree def; gphi *phi = gpi.phi (); - gphi *stmt; + tree def = PHI_ARG_DEF_FROM_EDGE (phi, exit); + gimple def_stmt = SSA_NAME_DEF_STMT (def); - stmt = as_a <gphi *> ( - SSA_NAME_DEF_STMT (PHI_ARG_DEF_FROM_EDGE (phi, exit))); + /* If the exit phi is not connected to a header phi in the same loop, this + value is not modified in the loop, and we're done with this phi. */ + if (!(gimple_code (def_stmt) == GIMPLE_PHI + && gimple_bb (def_stmt) == loop->header)) + continue; + gphi *stmt = as_a <gphi *> (def_stmt); def = PHI_ARG_DEF_FROM_EDGE (stmt, loop_preheader_edge (loop)); locus = gimple_phi_arg_location_from_edge (stmt, loop_preheader_edge (loop)); |