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[5/10] Add tree_to_shwi and tree_to_uhwi
- From: Richard Sandiford <rdsandiford at googlemail dot com>
- To: gcc-patches at gcc dot gnu dot org
- Date: Sat, 16 Nov 2013 13:03:20 +0000
- Subject: [5/10] Add tree_to_shwi and tree_to_uhwi
- Authentication-results: sourceware.org; auth=none
- References: <87ppq0tsn4 dot fsf at talisman dot default>
Add tree_to_shwi and tree_to_uhwi. Initially tree_to_uhwi returns a
HOST_WIDE_INT, so that it's a direct replacement for tree_low_cst.
Patch 10 makes it return unsigned HOST_WIDE_INT instead.
Thanks,
Richard
gcc/
* tree.h (tree_to_shwi, tree_to_uhwi): Declare, with inline expansions.
* tree.c (tree_to_shwi, tree_to_uhwi): New functions.
Index: gcc/tree.c
===================================================================
--- gcc/tree.c 2013-11-15 16:46:27.420395607 +0000
+++ gcc/tree.c 2013-11-15 16:47:15.226216885 +0000
@@ -7027,6 +7027,28 @@ tree_low_cst (const_tree t, int pos)
return TREE_INT_CST_LOW (t);
}
+/* T is an INTEGER_CST whose numerical value (extended according to
+ TYPE_UNSIGNED) fits in a signed HOST_WIDE_INT. Return that
+ HOST_WIDE_INT. */
+
+HOST_WIDE_INT
+tree_to_shwi (const_tree t)
+{
+ gcc_assert (tree_fits_shwi_p (t));
+ return TREE_INT_CST_LOW (t);
+}
+
+/* T is an INTEGER_CST whose numerical value (extended according to
+ TYPE_UNSIGNED) fits in an unsigned HOST_WIDE_INT. Return that
+ HOST_WIDE_INT. */
+
+HOST_WIDE_INT
+tree_to_uhwi (const_tree t)
+{
+ gcc_assert (tree_fits_uhwi_p (t));
+ return TREE_INT_CST_LOW (t);
+}
+
/* Return the most significant (sign) bit of T. */
int
Index: gcc/tree.h
===================================================================
--- gcc/tree.h 2013-11-15 16:46:26.263399881 +0000
+++ gcc/tree.h 2013-11-15 16:46:56.569287095 +0000
@@ -3662,6 +3662,8 @@ extern bool tree_fits_uhwi_p (const_tree
#endif
;
extern HOST_WIDE_INT tree_low_cst (const_tree, int);
+extern HOST_WIDE_INT tree_to_shwi (const_tree);
+extern HOST_WIDE_INT tree_to_uhwi (const_tree);
#if !defined ENABLE_TREE_CHECKING && (GCC_VERSION >= 4003)
extern inline __attribute__ ((__gnu_inline__)) HOST_WIDE_INT
tree_low_cst (const_tree t, int pos)
@@ -3669,6 +3671,20 @@ tree_low_cst (const_tree t, int pos)
gcc_assert (host_integerp (t, pos));
return TREE_INT_CST_LOW (t);
}
+
+extern inline __attribute__ ((__gnu_inline__)) HOST_WIDE_INT
+tree_to_shwi (const_tree t)
+{
+ gcc_assert (tree_fits_shwi_p (t));
+ return TREE_INT_CST_LOW (t);
+}
+
+extern inline __attribute__ ((__gnu_inline__)) HOST_WIDE_INT
+tree_to_uhwi (const_tree t)
+{
+ gcc_assert (tree_fits_uhwi_p (t));
+ return TREE_INT_CST_LOW (t);
+}
#endif
extern int tree_int_cst_sgn (const_tree);
extern int tree_int_cst_sign_bit (const_tree);