def : Proc<"x86-64", [Feature64Bit]>;
def : Proc<"yonah", [FeatureSSE3]>;
def : Proc<"prescott", [FeatureSSE3]>;
-def : Proc<"nocona", [FeatureSSE3]>;
-def : Proc<"core2", [FeatureSSSE3]>;
-def : Proc<"penryn", [FeatureSSE41]>;
+def : Proc<"nocona", [FeatureSSE3, Feature64Bit]>;
+def : Proc<"core2", [FeatureSSSE3, Feature64Bit]>;
+def : Proc<"penryn", [FeatureSSE41, Feature64Bit]>;
def : Proc<"k6", [FeatureMMX]>;
def : Proc<"k6-2", [FeatureMMX, Feature3DNow]>;