This removes special-casing of pointer conversion handling in
gimple_fold_stmt_to_constant_1 - this was from times where
most pointer conversions were not useless (only conversions
to function/method pointers from other kinds are considered
not useless - which I'll change with a followup).
Bootstrapped and tested on x86_64-unknown-linux-gnu, applied.
Richard.
2014-05-08 Richard Biener <rguent...@suse.de>
* gimple-fold.c (gimple_fold_stmt_to_constant_1): Remove
pointer propagation special-case.
Index: gcc/gimple-fold.c
===================================================================
--- gcc/gimple-fold.c (revision 210148)
+++ gcc/gimple-fold.c (working copy)
@@ -2638,20 +2638,6 @@ gimple_fold_stmt_to_constant_1 (gimple s
tree lhs = gimple_assign_lhs (stmt);
tree op0 = (*valueize) (gimple_assign_rhs1 (stmt));
- /* Conversions are useless for CCP purposes if they are
- value-preserving. Thus the restrictions that
- useless_type_conversion_p places for restrict qualification
- of pointer types should not apply here.
- Substitution later will only substitute to allowed places. */
- if (CONVERT_EXPR_CODE_P (subcode)
- && POINTER_TYPE_P (TREE_TYPE (lhs))
- && POINTER_TYPE_P (TREE_TYPE (op0))
- && TYPE_ADDR_SPACE (TREE_TYPE (lhs))
- == TYPE_ADDR_SPACE (TREE_TYPE (op0))
- && TYPE_MODE (TREE_TYPE (lhs))
- == TYPE_MODE (TREE_TYPE (op0)))
- return op0;
-
return
fold_unary_ignore_overflow_loc (loc, subcode,
gimple_expr_type (stmt), op0);
