Message ID | 20151209071550.GA90078@kam.mff.cuni.cz |
---|---|
State | New |
Headers | show |
On Wed, 9 Dec 2015, Jan Hubicka wrote: > > Hi, > > while debugging an renaming issue I run into ADDR_EXPR of MEM_REF of ADDR_EXPR > > which seemed somewhat odd + we don't really get the CONSTANT and other flags > > right because recompute_tree_invariant_for_addr_expr punts on ADDR_EXPR inside > > ADDR_EXPR. > > > > The expression is created by wrap_refs. While looking at the code I noitced that > > we wrap all VAR_DECLs while I think we only need to wrap ones that can be merged > > by lto-symtab. > > > > I wonder if the function could not stop the recursive walk on ADDR_EXPR and MEM_REFS? > > Is there a way we can use the inner MEM_REF for something useful? > > > > Bootstrapped/regtested x86_64-linux, OK? > > Uh, sorry, actually I forgot about DECL_EXTERNAL. Here is updated version I am re-testing. OK. > * lto-streamer-out.c (wrap_refs): Only wrap public variables. > Index: lto-streamer-out.c > =================================================================== > --- lto-streamer-out.c (revision 231438) > +++ lto-streamer-out.c (working copy) > @@ -2236,7 +2237,9 @@ wrap_refs (tree *tp, int *ws, void *) > { > tree t = *tp; > if (handled_component_p (t) > - && TREE_CODE (TREE_OPERAND (t, 0)) == VAR_DECL) > + && TREE_CODE (TREE_OPERAND (t, 0)) == VAR_DECL > + && (TREE_PUBLIC (TREE_OPERAND (t, 0)) > + || DECL_EXTERNAL (TREE_OPERAND (t, 0)))) > { > tree decl = TREE_OPERAND (t, 0); > tree ptrtype = build_pointer_type (TREE_TYPE (decl)); > >
Index: lto-streamer-out.c =================================================================== --- lto-streamer-out.c (revision 231438) +++ lto-streamer-out.c (working copy) @@ -2236,7 +2237,9 @@ wrap_refs (tree *tp, int *ws, void *) { tree t = *tp; if (handled_component_p (t) - && TREE_CODE (TREE_OPERAND (t, 0)) == VAR_DECL) + && TREE_CODE (TREE_OPERAND (t, 0)) == VAR_DECL + && (TREE_PUBLIC (TREE_OPERAND (t, 0)) + || DECL_EXTERNAL (TREE_OPERAND (t, 0)))) { tree decl = TREE_OPERAND (t, 0); tree ptrtype = build_pointer_type (TREE_TYPE (decl));