Replacing ApproxHPVM with HPVM in doc

hpvm/docs/developerdocs/backend-passes.rst

@@ -197,7 +197,7 @@ Consider the following leaf node function which performs a tensor convolution:
   }
 
 
-3. The rest of the pass can be viewed as a dictionary mapping from ApproxHPVM intrinsics representing tensor operations such as convolutions to their corresponding CuDNN functions.
+3. The rest of the pass can be viewed as a dictionary mapping from HPVM intrinsics representing tensor operations such as convolutions to their corresponding CuDNN functions.
 
 .. code-block:: c
 
@@ -235,7 +235,7 @@ codeGen(DFLeafNode* )
 ---------------------
 
 While the pass is generic, we only support `TENSOR_TARGET` (this hint implies HPVM nodes with tensor operations) nodes for fusion. 
-Additionally each leaf node is first identified as being a valid HPVM tensor node (i.e. contains ApproxHPVM intrinsics as the first intrinsic). 
+Additionally each leaf node is first identified as being a valid HPVM tensor node (i.e. contains HPVM intrinsics as the first intrinsic). 
 
 Consider the following consecutive leaf nodes: