diff options
Diffstat (limited to 'gcc/tree-vect-loop-manip.c')
| -rw-r--r-- | gcc/tree-vect-loop-manip.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/gcc/tree-vect-loop-manip.c b/gcc/tree-vect-loop-manip.c index f9fdf013e10..35c5435b76e 100644 --- a/gcc/tree-vect-loop-manip.c +++ b/gcc/tree-vect-loop-manip.c @@ -725,6 +725,22 @@ slpeel_duplicate_current_defs_from_edges (edge from, edge to) { gimple_stmt_iterator gsi_from, gsi_to; + /* Check that we're looking at two blocks with analogous PHI + nodes before changing anything. */ + for (gsi_from = gsi_start_phis (from->dest), + gsi_to = gsi_start_phis (to->dest); + !gsi_end_p (gsi_from) && !gsi_end_p (gsi_to); + gsi_next (&gsi_from), gsi_next (&gsi_to)) + { + gimple *from_phi = gsi_stmt (gsi_from); + gimple *to_phi = gsi_stmt (gsi_to); + if (SSA_NAME_VAR (PHI_RESULT (from_phi)) + != SSA_NAME_VAR (PHI_RESULT (to_phi))) + return; + } + if (gsi_end_p (gsi_from) != gsi_end_p (gsi_to)) + return; + for (gsi_from = gsi_start_phis (from->dest), gsi_to = gsi_start_phis (to->dest); !gsi_end_p (gsi_from) && !gsi_end_p (gsi_to); |