diff options
Diffstat (limited to 'gcc/tree-vect-loop-manip.c')
| -rw-r--r-- | gcc/tree-vect-loop-manip.c | 24 |
1 files changed, 20 insertions, 4 deletions
diff --git a/gcc/tree-vect-loop-manip.c b/gcc/tree-vect-loop-manip.c index 51d52ac..935cd75 100644 --- a/gcc/tree-vect-loop-manip.c +++ b/gcc/tree-vect-loop-manip.c @@ -71,7 +71,7 @@ rename_use_op (use_operand_p op_p) } -/* Renames the variables in basic block BB. Allow renaming of PHI argumnets +/* Renames the variables in basic block BB. Allow renaming of PHI arguments on edges incoming from outer-block header if RENAME_FROM_OUTER_LOOP is true. */ @@ -102,9 +102,25 @@ rename_variables_in_bb (basic_block bb, bool rename_from_outer_loop) FOR_EACH_EDGE (e, ei, bb->preds) { - if (!flow_bb_inside_loop_p (loop, e->src) - && (!rename_from_outer_loop || e->src != outer_loop->header)) - continue; + if (!flow_bb_inside_loop_p (loop, e->src)) + { + if (!rename_from_outer_loop) + continue; + if (e->src != outer_loop->header) + { + if (outer_loop->inner->next) + { + /* If outer_loop has 2 inner loops, allow there to + be an extra basic block which decides which of the + two loops to use using LOOP_VECTORIZED. */ + if (!single_pred_p (e->src) + || single_pred (e->src) != outer_loop->header) + continue; + } + else + continue; + } + } for (gphi_iterator gsi = gsi_start_phis (bb); !gsi_end_p (gsi); gsi_next (&gsi)) rename_use_op (PHI_ARG_DEF_PTR_FROM_EDGE (gsi.phi (), e)); |