Fix test failures (#218)

Author: jansel

torchinductor/codegen/triton.py

@@ -56,7 +56,7 @@ def constant(value, dtype):
             return 'float("inf")'
         elif value == float("-inf"):
             return 'float("-inf")'
-        return super().constant(value, dtype)
+        return OpOverrides.constant(value, dtype)
 
     @staticmethod
     def abs(x):

torchinductor/decomposition.py

@@ -140,7 +140,7 @@ def rsub(a, b):
     return b - a
 
 
-@register_decomposition([aten.pow.Tensor_Scalar], decompositions)
+@register_decomposition([aten.pow], decompositions)
 def pow(a, b):
     # see https://github.com/openai/triton/issues/506
     # triton doesn't support pow, so need to rewrite it