diff options
Diffstat (limited to 'gcc/tree-ssa.c')
| -rw-r--r-- | gcc/tree-ssa.c | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/gcc/tree-ssa.c b/gcc/tree-ssa.c index d4c519f..0be4591 100644 --- a/gcc/tree-ssa.c +++ b/gcc/tree-ssa.c @@ -1881,6 +1881,11 @@ maybe_optimize_var (tree var, bitmap addresses_taken, bitmap not_reg_needs) || bitmap_bit_p (addresses_taken, DECL_UID (var))) return false; + /* If the variable is not in the list of referenced vars then we + do not need to touch it nor can we rename it. */ + if (!referenced_var_lookup (DECL_UID (var))) + return false; + if (TREE_ADDRESSABLE (var) /* Do not change TREE_ADDRESSABLE if we need to preserve var as a non-register. Otherwise we are confused and forget to @@ -2031,13 +2036,7 @@ execute_update_addresses_taken (bool do_optimize) unused vars from BLOCK trees which cause code generation differences for -g vs. -g0. */ for (var = DECL_ARGUMENTS (cfun->decl); var; var = DECL_CHAIN (var)) - { - /* ??? Not all arguments are in referenced vars. */ - if (!var_ann (var)) - continue; - update_vops - |= maybe_optimize_var (var, addresses_taken, not_reg_needs); - } + update_vops |= maybe_optimize_var (var, addresses_taken, not_reg_needs); for (i = 0; VEC_iterate (tree, cfun->local_decls, i, var); ++i) update_vops |= maybe_optimize_var (var, addresses_taken, not_reg_needs); } |