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tree-dfa.c (add_referenced_var): Walk initializers of non-constant/readonly static vars.

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* tree-dfa.c (add_referenced_var): Walk initializers of
	non-constant/readonly static vars.

From-SVN: r120090
This commit is contained in:
Jan Hubicka 2006-12-20 23:45:42 +01:00 committed by Jan Hubicka
parent adb6509f4b
commit 33dde1e155
2 changed files with 9 additions and 6 deletions

5
gcc/ChangeLog

@ -1,3 +1,8 @@
2006-12-20 Jan Hubicka <jh@suse.cz>
* tree-dfa.c (add_referenced_var): Walk initializers of
non-constant/readonly static vars.
2006-12-20 Jan Hubicka <jh@suse.cz>
* tree-flow-inline.h (gimple_var_anns): New function.

10
gcc/tree-dfa.c

@ -741,15 +741,13 @@ add_referenced_var (tree var)
/* Scan DECL_INITIAL for pointer variables as they may contain
address arithmetic referencing the address of other
variables. */
variables.
Even non-constant intializers need to be walked, because
IPA passes might prove that their are invariant later on. */
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
variables because it cannot be propagated by the
optimizers. */
&& (TREE_CONSTANT (var) || TREE_READONLY (var)))
&& !DECL_EXTERNAL (var))
walk_tree (&DECL_INITIAL (var), find_vars_r, NULL, 0);
}
}