diff options
Diffstat (limited to 'gcc/tree-ssa.c')
| -rw-r--r-- | gcc/tree-ssa.c | 19 |
1 files changed, 4 insertions, 15 deletions
diff --git a/gcc/tree-ssa.c b/gcc/tree-ssa.c index bcf65e1..2535461 100644 --- a/gcc/tree-ssa.c +++ b/gcc/tree-ssa.c @@ -1188,10 +1188,11 @@ tree_ssa_strip_useless_type_conversions (tree exp) } -/* Return true if T, an SSA_NAME, has an undefined value. */ +/* Return true if T, an SSA_NAME, has an undefined value. PARTIAL is what + should be returned if the value is only partially undefined. */ bool -ssa_undefined_value_p (tree t) +ssa_undefined_value_p (tree t, bool partial) { gimple def_stmt; tree var = SSA_NAME_VAR (t); @@ -1215,7 +1216,7 @@ ssa_undefined_value_p (tree t) return true; /* Check if the complex was not only partially defined. */ - if (is_gimple_assign (def_stmt) + if (partial && is_gimple_assign (def_stmt) && gimple_assign_rhs_code (def_stmt) == COMPLEX_EXPR) { tree rhs1, rhs2; @@ -1561,18 +1562,6 @@ execute_update_addresses_taken (void) if (gimple_assign_lhs (stmt) != lhs) gimple_assign_set_lhs (stmt, lhs); - /* For var ={v} {CLOBBER}; where var lost - TREE_ADDRESSABLE just remove the stmt. */ - if (DECL_P (lhs) - && TREE_CLOBBER_P (rhs) - && bitmap_bit_p (suitable_for_renaming, DECL_UID (lhs))) - { - unlink_stmt_vdef (stmt); - gsi_remove (&gsi, true); - release_defs (stmt); - continue; - } - if (gimple_assign_rhs1 (stmt) != rhs) { gimple_stmt_iterator gsi = gsi_for_stmt (stmt); |