+2010-09-15 Jakub Jelinek <jakub@redhat.com>
+
+ PR tree-optimization/45633
+ * tree-cfg.c (verify_gimple_assign_binary): Allow
+ MINUS_EXPR with lhs and rhs1 pointer vector and
+ rhs2 sizetype vector.
+ * expr.c (expand_expr_real_2) <case PLUS_EXPR>: For pointer
+ or vector pointer use TER to optimize pointer subtraction.
+
2010-09-15 Jie Zhang <jie@codesourcery.com>
* config/arm/vfp.md (cmpsf_trap_vfp): Change type from
}
}
+ /* Use TER to expand pointer addition of a negated value
+ as pointer subtraction. */
+ if ((POINTER_TYPE_P (TREE_TYPE (treeop0))
+ || (TREE_CODE (TREE_TYPE (treeop0)) == VECTOR_TYPE
+ && POINTER_TYPE_P (TREE_TYPE (TREE_TYPE (treeop0)))))
+ && TREE_CODE (treeop1) == SSA_NAME
+ && TYPE_MODE (TREE_TYPE (treeop0))
+ == TYPE_MODE (TREE_TYPE (treeop1)))
+ {
+ gimple def = get_def_for_expr (treeop1, NEGATE_EXPR);
+ if (def)
+ {
+ treeop1 = gimple_assign_rhs1 (def);
+ code = MINUS_EXPR;
+ goto do_minus;
+ }
+ }
+
/* No sense saving up arithmetic to be done
if it's all in the wrong mode to form part of an address.
And force_operand won't know whether to sign-extend or
return REDUCE_BIT_FIELD (simplify_gen_binary (PLUS, mode, op0, op1));
case MINUS_EXPR:
+ do_minus:
/* For initializers, we are allowed to return a MINUS of two
symbolic constants. Here we handle all cases when both operands
are constant. */
+2010-09-15 Jakub Jelinek <jakub@redhat.com>
+
+ PR tree-optimization/45633
+ * gcc.dg/vect/pr45633.c: New test.
+
2010-09-15 Janus Weil <janus@gcc.gnu.org>
PR fortran/45577
--- /dev/null
+/* PR tree-optimization/45633 */
+/* { dg-do compile } */
+
+int s[32];
+unsigned char *t[32];
+
+void
+foo (void)
+{
+ int i;
+ for (i = 0; i < 32; i++)
+ t[i] -= s[i];
+}
+
+/* { dg-final { cleanup-tree-dump "vect" } } */
}
case PLUS_EXPR:
+ case MINUS_EXPR:
{
- /* We use regular PLUS_EXPR for vectors.
+ /* We use regular PLUS_EXPR and MINUS_EXPR for vectors.
??? This just makes the checker happy and may not be what is
intended. */
if (TREE_CODE (lhs_type) == VECTOR_TYPE
}
goto do_pointer_plus_expr_check;
}
- }
- /* Fallthru. */
- case MINUS_EXPR:
- {
if (POINTER_TYPE_P (lhs_type)
|| POINTER_TYPE_P (rhs1_type)
|| POINTER_TYPE_P (rhs2_type))