diff options
Diffstat (limited to 'gcc/tree-cfg.c')
| -rw-r--r-- | gcc/tree-cfg.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/gcc/tree-cfg.c b/gcc/tree-cfg.c index a585efe..0396aa9 100644 --- a/gcc/tree-cfg.c +++ b/gcc/tree-cfg.c @@ -5756,6 +5756,7 @@ gimple_make_forwarder_block (edge fallthru) basic_block dummy, bb; tree var; gphi_iterator gsi; + bool forward_location_p; dummy = fallthru->src; bb = fallthru->dest; @@ -5763,6 +5764,9 @@ gimple_make_forwarder_block (edge fallthru) if (single_pred_p (bb)) return; + /* We can forward location info if we have only one predecessor. */ + forward_location_p = single_pred_p (dummy); + /* If we redirected a branch we must create new PHI nodes at the start of BB. */ for (gsi = gsi_start_phis (dummy); !gsi_end_p (gsi); gsi_next (&gsi)) @@ -5774,7 +5778,8 @@ gimple_make_forwarder_block (edge fallthru) new_phi = create_phi_node (var, bb); gimple_phi_set_result (phi, copy_ssa_name (var, phi)); add_phi_arg (new_phi, gimple_phi_result (phi), fallthru, - UNKNOWN_LOCATION); + forward_location_p + ? gimple_phi_arg_location (phi, 0) : UNKNOWN_LOCATION); } /* Add the arguments we have stored on edges. */ |