http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49478
Ira Rosen <irar at il dot ibm.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |irar at il dot ibm.com
--- Comment #2 from Ira Rosen <irar at il dot ibm.com> 2011-06-21 07:33:15 UTC
---
I am testing this patch:
Index: tree-vect-loop.c
===================================================================
--- tree-vect-loop.c (revision 175238)
+++ tree-vect-loop.c (working copy)
@@ -4591,6 +4591,29 @@ vectorizable_reduction (gimple stmt, gim
return false;
}
+ /* In case of widenning multiplication by a constant, we update the type
+ of the constant to be the type of the other operand. We check that the
+ constant fits the type in the pattern recognition pass. */
+ if (code == DOT_PROD_EXPR
+ && !types_compatible_p (TREE_TYPE (ops[0]), TREE_TYPE (ops[1])))
+ {
+ if (TREE_CODE (ops[0]) == INTEGER_CST)
+ ops[0] = build_int_cst_wide (TREE_TYPE (ops[1]),
+ TREE_INT_CST_LOW (ops[0]),
+ TREE_INT_CST_HIGH (ops[0]));
+ else if (TREE_CODE (ops[1]) == INTEGER_CST)
+ ops[1] = build_int_cst_wide (TREE_TYPE (ops[0]),
+ TREE_INT_CST_LOW (ops[1]),
+ TREE_INT_CST_HIGH (ops[1]));
+ else
+ {
+ if (vect_print_dump_info (REPORT_DETAILS))
+ fprintf (vect_dump, "invalid types in dot-prod");
+
+ return false;
+ }
+ }
+
if (!vec_stmt) /* transformation not required. */
{
if (!vect_model_reduction_cost (stmt_info, epilog_reduc_code, ncopies))
