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tree-inline.c (copy_body_r): Avoid generating &* during inline substitution.

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* tree-inline.c (copy_body_r): Avoid generating &* during inline
        substitution.

From-SVN: r66964
This commit is contained in:
Jason Merrill 2003-05-19 12:17:32 -04:00 committed by Jason Merrill
parent b041fbe613
commit 68594ce757
2 changed files with 44 additions and 14 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2003-05-19 Jason Merrill <jason@redhat.com>
* tree-inline.c (copy_body_r): Avoid generating &* during inline
substitution.
2003-05-19 Andrew Macleod <amacleod@redhat.com>
* config/stormy16/stormy16.c (xstormy16_expand_prologue): Do

53
gcc/tree-inline.c
View File

@ -546,19 +546,10 @@ copy_body_r (tp, walk_subtrees, data)
knows not to copy VAR_DECLs, etc., so this is safe. */
else
{
copy_tree_r (tp, walk_subtrees, NULL);
/* The copied TARGET_EXPR has never been expanded, even if the
original node was expanded already. */
if (TREE_CODE (*tp) == TARGET_EXPR && TREE_OPERAND (*tp, 3))
{
TREE_OPERAND (*tp, 1) = TREE_OPERAND (*tp, 3);
TREE_OPERAND (*tp, 3) = NULL_TREE;
}
else if (TREE_CODE (*tp) == MODIFY_EXPR
&& TREE_OPERAND (*tp, 0) == TREE_OPERAND (*tp, 1)
&& ((*lang_hooks.tree_inlining.auto_var_in_fn_p)
(TREE_OPERAND (*tp, 0), fn)))
if (TREE_CODE (*tp) == MODIFY_EXPR
&& TREE_OPERAND (*tp, 0) == TREE_OPERAND (*tp, 1)
&& ((*lang_hooks.tree_inlining.auto_var_in_fn_p)
(TREE_OPERAND (*tp, 0), fn)))
{
/* Some assignments VAR = VAR; don't generate any rtl code
and thus don't count as variable modification. Avoid
@ -572,9 +563,43 @@ copy_body_r (tp, walk_subtrees, data)
value = (tree) n->value;
STRIP_TYPE_NOPS (value);
if (TREE_CONSTANT (value) || TREE_READONLY_DECL_P (value))
*tp = value;
{
*tp = value;
return copy_body_r (tp, walk_subtrees, data);
}
}
}
else if (TREE_CODE (*tp) == ADDR_EXPR
&& ((*lang_hooks.tree_inlining.auto_var_in_fn_p)
(TREE_OPERAND (*tp, 0), fn)))
{
/* Get rid of &* from inline substitutions. It can occur when
someone takes the address of a parm or return slot passed by
invisible reference. */
tree decl = TREE_OPERAND (*tp, 0), value;
splay_tree_node n;
n = splay_tree_lookup (id->decl_map, (splay_tree_key) decl);
if (n)
{
value = (tree) n->value;
if (TREE_CODE (value) == INDIRECT_REF)
{
*tp = convert (TREE_TYPE (*tp), TREE_OPERAND (value, 0));
return copy_body_r (tp, walk_subtrees, data);
}
}
}
copy_tree_r (tp, walk_subtrees, NULL);
/* The copied TARGET_EXPR has never been expanded, even if the
original node was expanded already. */
if (TREE_CODE (*tp) == TARGET_EXPR && TREE_OPERAND (*tp, 3))
{
TREE_OPERAND (*tp, 1) = TREE_OPERAND (*tp, 3);
TREE_OPERAND (*tp, 3) = NULL_TREE;
}
}
/* Keep iterating. */