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Diffstat (limited to 'gcc/tree-ssa-dce.c')
| -rw-r--r-- | gcc/tree-ssa-dce.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/gcc/tree-ssa-dce.c b/gcc/tree-ssa-dce.c index fdfdda5e95f..bbf37f7a028 100644 --- a/gcc/tree-ssa-dce.c +++ b/gcc/tree-ssa-dce.c @@ -873,7 +873,8 @@ remove_dead_phis (basic_block bb) FOR_EACH_IMM_USE_STMT (use_stmt, iter, vdef) FOR_EACH_IMM_USE_ON_STMT (use_p, iter) SET_USE (use_p, vuse); - if (SSA_NAME_OCCURS_IN_ABNORMAL_PHI (vdef)) + if (SSA_NAME_OCCURS_IN_ABNORMAL_PHI (vdef) + && TREE_CODE (vuse) == SSA_NAME) SSA_NAME_OCCURS_IN_ABNORMAL_PHI (vuse) = 1; } else @@ -1137,7 +1138,8 @@ eliminate_unnecessary_stmts (void) for (bb = ENTRY_BLOCK_PTR->next_bb; bb != EXIT_BLOCK_PTR; bb = next_bb) { next_bb = bb->next_bb; - if (!(bb->flags & BB_REACHABLE)) + if (!TEST_BIT (bb_contains_live_stmts, bb->index) + || !(bb->flags & BB_REACHABLE)) { for (gsi = gsi_start_phis (bb); !gsi_end_p (gsi); gsi_next (&gsi)) if (!is_gimple_reg (gimple_phi_result (gsi_stmt (gsi)))) @@ -1159,7 +1161,8 @@ eliminate_unnecessary_stmts (void) if (found) mark_virtual_phi_result_for_renaming (gsi_stmt (gsi)); } - delete_basic_block (bb); + if (!(bb->flags & BB_REACHABLE)) + delete_basic_block (bb); } } } |