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use build_one_cst in tree-ssa-loop-im.c
- From: Nathan Froyd <froydnj at codesourcery dot com>
- To: gcc-patches at gcc dot gnu dot org
- Date: Sat, 30 Oct 2010 22:32:25 -0400
- Subject: use build_one_cst in tree-ssa-loop-im.c
This code in tree-ssa-loop-im.c:
/* For vectors, create a VECTOR_CST full of 1's. */
if (TREE_CODE (type) == VECTOR_TYPE)
{
int i, len;
tree list = NULL_TREE;
real_one = build_real (TREE_TYPE (type), dconst1);
len = TYPE_VECTOR_SUBPARTS (type);
for (i = 0; i < len; i++)
list = tree_cons (NULL, real_one, list);
real_one = build_vector (type, list);
}
else
real_one = build_real (type, dconst1);
reduces to:
if (TREE_CODE (type) == VECTOR_TYPE)
{
real_one = build_real (TREE_TYPE (type), dconst1);
real_one = build_vector_from_val (type, real_one);
}
else
real_one - build_real (type, dconst1);
which is exactly what build_one_cst does. So call that instead.
Tested on x86_64-unknown-linux-gnu. Committed as obvious.
-Nathan
* tree-ssa-loop-im.c (rewrite_reciprocal): Use build_one_cst.
Index: tree-ssa-loop-im.c
===================================================================
--- tree-ssa-loop-im.c (revision 166100)
+++ tree-ssa-loop-im.c (working copy)
@@ -910,19 +910,7 @@ rewrite_reciprocal (gimple_stmt_iterator
add_referenced_var (var);
DECL_GIMPLE_REG_P (var) = 1;
- /* For vectors, create a VECTOR_CST full of 1's. */
- if (TREE_CODE (type) == VECTOR_TYPE)
- {
- int i, len;
- tree list = NULL_TREE;
- real_one = build_real (TREE_TYPE (type), dconst1);
- len = TYPE_VECTOR_SUBPARTS (type);
- for (i = 0; i < len; i++)
- list = tree_cons (NULL, real_one, list);
- real_one = build_vector (type, list);
- }
- else
- real_one = build_real (type, dconst1);
+ real_one = build_one_cst (type);
stmt1 = gimple_build_assign_with_ops (RDIV_EXPR,
var, real_one, gimple_assign_rhs2 (stmt));