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re PR middle-end/35545 (tracer pass is run too late) 

PR middle-end/35535
	* gimple-fold.c (fold_gimple_assign): Attempt to devirtualize
	OBJ_TYPE_REF.
	(gimple_fold_stmt_to_constant_1): Bypass OBJ_TYPE_REF wrappers.

From-SVN: r206074
This commit is contained in:
Jan Hubicka 2013-12-18 00:43:22 +01:00 committed by Jan Hubicka
parent a4fff37a46
commit bdf37f7a71
2 changed files with 38 additions and 0 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2013-12-17 Jan Hubicka <hubicka@ucw.cz>
PR middle-end/35535
* gimple-fold.c (fold_gimple_assign): Attempt to devirtualize
OBJ_TYPE_REF.
(gimple_fold_stmt_to_constant_1): Bypass OBJ_TYPE_REF wrappers.
2013-12-17 Jan Hubicka <hubicka@ucw.cz>
PR middle-end/35535

31
gcc/gimple-fold.c
View File

@ -374,6 +374,30 @@ fold_gimple_assign (gimple_stmt_iterator *si)
if (REFERENCE_CLASS_P (rhs))
return maybe_fold_reference (rhs, false);
else if (TREE_CODE (rhs) == OBJ_TYPE_REF)
{
tree val = OBJ_TYPE_REF_EXPR (rhs);
if (is_gimple_min_invariant (val))
return val;
else if (flag_devirtualize && virtual_method_call_p (val))
{
bool final;
vec <cgraph_node *>targets
= possible_polymorphic_call_targets (val, &final);
if (final && targets.length () <= 1)
{
tree fndecl;
if (targets.length () == 1)
fndecl = targets[0]->decl;
else
fndecl = builtin_decl_implicit (BUILT_IN_UNREACHABLE);
val = fold_convert (TREE_TYPE (val), fndecl);
STRIP_USELESS_TYPE_CONVERSION (val);
return val;
}
}
}
else if (TREE_CODE (rhs) == ADDR_EXPR)
{
tree ref = TREE_OPERAND (rhs, 0);
@ -2525,6 +2549,13 @@ gimple_fold_stmt_to_constant_1 (gimple stmt, tree (*valueize) (tree))
return build_vector (TREE_TYPE (rhs), vec);
}
if (subcode == OBJ_TYPE_REF)
{
tree val = (*valueize) (OBJ_TYPE_REF_EXPR (rhs));
/* If callee is constant, we can fold away the wrapper. */
if (is_gimple_min_invariant (val))
return val;
}
if (kind == tcc_reference)
{