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From: "ubizjak at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/46346] [4.6 regression] fma testsuite failures
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46346

--- Comment #2 from Uros Bizjak <ubizjak at gmail dot com> 2010-11-07 16:15:39 UTC ---
A trivial attempt that fixes builtin-attr-1.c for x86 with -mfma:

Index: tree-ssa-forwprop.c
===================================================================
--- tree-ssa-forwprop.c    (revision 166415)
+++ tree-ssa-forwprop.c    (working copy)
@@ -341,7 +341,11 @@ rhs_to_tree (tree type, gimple stmt)
 {
   location_t loc = gimple_location (stmt);
   enum tree_code code = gimple_assign_rhs_code (stmt);
-  if (get_gimple_rhs_class (code) == GIMPLE_BINARY_RHS)
+  if (get_gimple_rhs_class (code) == GIMPLE_TERNARY_RHS)
+    return fold_build3_loc (loc, code, type, gimple_assign_rhs1 (stmt),
+                gimple_assign_rhs2 (stmt),
+                gimple_assign_rhs3 (stmt));
+  else if (get_gimple_rhs_class (code) == GIMPLE_BINARY_RHS)
     return fold_build2_loc (loc, code, type, gimple_assign_rhs1 (stmt),
             gimple_assign_rhs2 (stmt));
   else if (get_gimple_rhs_class (code) == GIMPLE_UNARY_RHS)