Revert "[MLIR][Shape] Allow `num_elements` to operate on extent tensors"

This reverts commit 55ced04d6b.

Forgot to submit depend change first.

mlir/include/mlir/Dialect/Shape/IR/ShapeOps.td

@@ -333,19 +333,19 @@ def Shape_NumElementsOp : Shape_Op<"num_elements", [NoSideEffect]> {
   let summary = "Returns the number of elements for a given shape";
   let description = [{
     Returns the number of elements for a given shape which is the product of its
-    extents. If the argument is of type `shape` then the result will be of type
+    dimensions.
-    `size` and potential errors will be propagated. Otherwise, if the argument
+
-    is and extent tensor `tensor<?xindex>` then the result will be of type
+    ```mlir
-    `index`.
+    %product = shape.mul %lhs, %rhs
+    ```
   }];
 
-  let arguments = (ins Shape_ShapeOrExtentTensorType:$shape);
+  let arguments = (ins Shape_ShapeType:$shape);
-  let results = (outs Shape_SizeOrIndexType:$result);
+  let results = (outs Shape_SizeType:$result);
 
-  let assemblyFormat = "$shape `:` type($shape) `->` type($result) attr-dict";
+  let assemblyFormat = "$shape attr-dict";
 
   let hasFolder = 1;
-  let verifier = [{ return ::verifySizeOrIndexOp(*this); }];
 }
 
 def Shape_ReduceOp : Shape_Op<"reduce",

mlir/test/Dialect/Shape/canonicalize.mlir

@@ -217,7 +217,7 @@ func @num_elements() -> !shape.size {
   // CHECK-NOT: shape.const_shape
   %shape = shape.const_shape [4, 5, 6] : !shape.shape
   // CHECK-NOT: shape.num_elements
-  %num_elements = shape.num_elements %shape : !shape.shape -> !shape.size
+  %num_elements = shape.num_elements %shape
   // CHECK: %[[NUM:.*]] = shape.const_size 120
   // CHECK-NEXT: return %[[NUM]] : !shape.size
   return %num_elements : !shape.size
@@ -229,7 +229,7 @@ func @num_elements() -> !shape.size {
 // CHECK-LABEL: func @nonfoldable_num_elements
 func @nonfoldable_num_elements(%shape : !shape.shape) -> !shape.size {
   // CHECK-NOT: shape.const_{{.*}}
-  %num_elements = shape.num_elements %shape : !shape.shape -> !shape.size
+  %num_elements = shape.num_elements %shape
   return %num_elements : !shape.size
 }
 

mlir/test/Dialect/Shape/invalid.mlir

@@ -146,19 +146,3 @@ func @mul_error_possible(%lhs : !shape.size, %rhs : index) -> index {
   return %result : index
 }
 
-// -----
-
-func @num_elements_error_free(%arg : tensor<?xindex>) -> !shape.size {
-  // expected-error@+1 {{if none of the operands can hold error values then the result must be of type `index`}}
-  %result = shape.num_elements %arg : tensor<?xindex> -> !shape.size
-  return %result : !shape.size
-}
-
-// -----
-
-func @num_elements_error_possible(%arg : !shape.shape) -> index {
-  // expected-error@+1 {{if at least one of the operands can hold error values then the result must be of type `size` to propagate them}}
-  %result = shape.num_elements %arg : !shape.shape -> index
-  return %result : index
-}
-

mlir/test/Dialect/Shape/ops.mlir

@@ -195,14 +195,3 @@ func @any() {
   return
 }
 
-func @num_elements_extent_tensor(%arg : tensor<?xindex>) -> index {
-  %result = shape.num_elements %arg : tensor<?xindex> -> index
-  return %result : index
-}
-
-func @num_elements_shape(%arg : !shape.shape) -> !shape.size {
-  %result = shape.num_elements %arg : !shape.shape -> !shape.size
-  return %result : !shape.size
-}
-
-

mlir/test/Dialect/Shape/shape-to-shape.mlir

@@ -1,9 +1,9 @@
 // RUN: mlir-opt -shape-to-shape-lowering -split-input-file %s | FileCheck %s
 
-// CHECK-LABEL: func @num_elements_to_reduce
+// CHECK-LABEL: func @num_elements_to_reduce(
-// CHECK-SAME:  ([[ARG:%.*]]: !shape.shape) -> !shape.size
+// CHECK-SAME:    [[ARG:%.*]]: !shape.shape) -> !shape.size {
 func @num_elements_to_reduce(%shape : !shape.shape) -> !shape.size {
-  %num_elements = shape.num_elements %shape : !shape.shape -> !shape.size
+  %num_elements = shape.num_elements %shape
   return %num_elements : !shape.size
 }
 // CHECK: [[C1:%.*]] = shape.const_size 1