Add tree_fits_shwi_p and tree_fits_uhwi_p. The implementations are taken
directly from host_integerp.
Thanks,
Richard
gcc/
* tree.h (tree_fits_shwi_p, tree_fits_uhwi_p): Declare.
* tree.c (tree_fits_shwi_p, tree_fits_uhwi_p): Define.
Index: gcc/tree.h
===================================================================
--- gcc/tree.h 2013-11-16 09:09:56.388037088 +0000
+++ gcc/tree.h 2013-11-16 09:11:53.535874667 +0000
@@ -3659,6 +3659,16 @@ extern int host_integerp (const_tree, in
ATTRIBUTE_PURE /* host_integerp is pure only when checking is disabled. */
#endif
;
+extern bool tree_fits_shwi_p (const_tree)
+#ifndef ENABLE_TREE_CHECKING
+ ATTRIBUTE_PURE /* tree_fits_shwi_p is pure only when checking is disabled.
*/
+#endif
+ ;
+extern bool tree_fits_uhwi_p (const_tree)
+#ifndef ENABLE_TREE_CHECKING
+ ATTRIBUTE_PURE /* tree_fits_uhwi_p is pure only when checking is disabled.
*/
+#endif
+ ;
extern HOST_WIDE_INT tree_low_cst (const_tree, int);
#if !defined ENABLE_TREE_CHECKING && (GCC_VERSION >= 4003)
extern inline __attribute__ ((__gnu_inline__)) HOST_WIDE_INT
Index: gcc/tree.c
===================================================================
--- gcc/tree.c 2013-11-16 09:09:56.388037088 +0000
+++ gcc/tree.c 2013-11-16 09:11:53.534874659 +0000
@@ -6990,6 +6990,32 @@ host_integerp (const_tree t, int pos)
|| (pos && TREE_INT_CST_HIGH (t) == 0)));
}
+/* Return true if T is an INTEGER_CST whose numerical value (extended
+ according to TYPE_UNSIGNED) fits in a signed HOST_WIDE_INT. */
+
+bool
+tree_fits_shwi_p (const_tree t)
+{
+ return (t != NULL_TREE
+ && TREE_CODE (t) == INTEGER_CST
+ && ((TREE_INT_CST_HIGH (t) == 0
+ && (HOST_WIDE_INT) TREE_INT_CST_LOW (t) >= 0)
+ || (TREE_INT_CST_HIGH (t) == -1
+ && (HOST_WIDE_INT) TREE_INT_CST_LOW (t) < 0
+ && !TYPE_UNSIGNED (TREE_TYPE (t)))));
+}
+
+/* Return true if T is an INTEGER_CST whose numerical value (extended
+ according to TYPE_UNSIGNED) fits in an unsigned HOST_WIDE_INT. */
+
+bool
+tree_fits_uhwi_p (const_tree t)
+{
+ return (t != NULL_TREE
+ && TREE_CODE (t) == INTEGER_CST
+ && TREE_INT_CST_HIGH (t) == 0);
+}
+
/* Return the HOST_WIDE_INT least significant bits of T if it is an
INTEGER_CST and there is no overflow. POS is nonzero if the result must
be non-negative. We must be able to satisfy the above conditions. */
