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| author | Jan Hubicka <jh@suse.cz> | 2005-03-03 20:53:47 +0100 |
|---|---|---|
| committer | Jan Hubicka <hubicka@gcc.gnu.org> | 2005-03-03 19:53:47 +0000 |
| commit | 59c982fe93b0c73af8e3208ae2f050cfce282849 (patch) | |
| tree | dda0b5cd5fd490aa7e859092678f02933789bca8 | |
| parent | e59ef5430f91f355a5fe9cff78cd3b2b70399bfc (diff) | |
| download | gcc-59c982fe93b0c73af8e3208ae2f050cfce282849.zip gcc-59c982fe93b0c73af8e3208ae2f050cfce282849.tar.gz gcc-59c982fe93b0c73af8e3208ae2f050cfce282849.tar.bz2 | |
tree-dfa.c (add_referenced_var): Don't walk initializer of external and non-constant public variables.
* tree-dfa.c (add_referenced_var): Don't walk initializer of external
and non-constant public variables.
From-SVN: r95844
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/tree-dfa.c | 9 |
2 files changed, 13 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index ba2e68a..1b54469 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2005-03-03 Jan Hubicka <jh@suse.cz> + + * tree-dfa.c (add_referenced_var): Don't walk initializer of external + and non-constant public variables. + 2005-03-03 Kazu Hirata <kazu@cs.umass.edu> * tree-cfg.c (stmt_starts_bb_p): Clean up by replacing code diff --git a/gcc/tree-dfa.c b/gcc/tree-dfa.c index b591ffb..641bb1b 100644 --- a/gcc/tree-dfa.c +++ b/gcc/tree-dfa.c @@ -901,7 +901,14 @@ add_referenced_var (tree var, struct walk_state *walk_state) /* Scan DECL_INITIAL for pointer variables as they may contain address arithmetic referencing the address of other variables. */ - if (DECL_INITIAL (var)) + if (DECL_INITIAL (var) + /* Initializers of external variables are not useful to the + optimizers. */ + && !DECL_EXTERNAL (var) + /* It's not necessary to walk the initial value of non-constant + public variables because it cannot be propagated by the + optimizers. */ + && (!TREE_PUBLIC (var) || !TREE_CONSTANT (var))) walk_tree (&DECL_INITIAL (var), find_vars_r, walk_state, 0); } } |