[MLIR][Doc] Prepend "Variadic of" in front of variadic operands (#69285)

Table of Operands for operations like:

https://mlir.llvm.org/docs/Dialects/MemRef/#operands-6

Don't distinguish variadic ODS operands from others right now.

After this change, it'll print:

| Operand      | Description       |
| dynamicSizes | Variadic of index |

instead of:

| Operand      | Description |
| dynamicSizes | index       |

Author: joker-eph

flang/test/Fir/invalid.fir

@@ -690,7 +690,7 @@ func.func @bad_array_modify(%arr1 : !fir.ref<!fir.array<?x?xf32>>, %m : index, %
 func.func @slice_must_be_integral() {
   %0 = arith.constant 42 : i32
   %1 = fir.field_index field, !fir.type<t(param:i32){field:i32}> (%0 : i32)
-  // expected-error@+1 {{'fir.slice' op operand #0 must be any integer, but got '!fir.field'}}
+  // expected-error@+1 {{'fir.slice' op operand #0 must be variadic of any integer, but got '!fir.field'}}
   %2 = fir.slice %1, %1, %1 : (!fir.field, !fir.field, !fir.field) -> !fir.slice<1>
   return
 }

flang/test/HLFIR/invalid.fir

@@ -267,15 +267,15 @@ func.func @bad_concat(%arg0: !fir.ref<!fir.char<1,10>>, %arg1: !fir.ref<!fir.cha
 // -----
 func.func @bad_concat_2(%arg0: !fir.ref<!fir.array<100x!fir.char<1,10>>>, %arg1: !fir.ref<!fir.array<100x!fir.char<1,20>>>) {
   %c30 = arith.constant 30 : index
-  // expected-error@+1 {{'hlfir.concat' op operand #0 must be any character scalar type, but got '!fir.ref<!fir.array<100x!fir.char<1,10>>>'}}
+  // expected-error@+1 {{'hlfir.concat' op operand #0 must be variadic of any character scalar type, but got '!fir.ref<!fir.array<100x!fir.char<1,10>>>'}}
   %0 = hlfir.concat %arg0, %arg1 len %c30 : (!fir.ref<!fir.array<100x!fir.char<1,10>>>, !fir.ref<!fir.array<100x!fir.char<1,20>>>, index) -> (!hlfir.expr<100x!fir.char<1,30>>)
   return
 }
 
 // -----
 func.func @bad_concat_3(%arg0: !fir.ref<!fir.char<1,10>>, %arg1: !fir.ref<i32>) {
   %c30 = arith.constant 30 : index
-  // expected-error@+1 {{'hlfir.concat' op operand #1 must be any character scalar type, but got '!fir.ref<i32>'}}
+  // expected-error@+1 {{'hlfir.concat' op operand #1 must be variadic of any character scalar type, but got '!fir.ref<i32>'}}
   %0 = hlfir.concat %arg0, %arg1 len %c30 : (!fir.ref<!fir.char<1,10>>, !fir.ref<i32>, index) -> (!hlfir.expr<!fir.char<1,30>>)
   return
 }

mlir/include/mlir/IR/CommonTypeConstraints.td

@@ -117,7 +117,8 @@ class DialectType<Dialect d, Pred condition, string descr = "",
 
 // A variadic type constraint. It expands to zero or more of the base type. This
 // class is used for supporting variadic operands/results.
-class Variadic<Type type> : TypeConstraint<type.predicate, type.summary,
+class Variadic<Type type> : TypeConstraint<type.predicate,
+                                           "variadic of " # type.summary,
                                            type.cppClassName> {
   Type baseType = type;
   int minSize = 0;

mlir/test/Dialect/Affine/invalid.mlir

@@ -5,7 +5,7 @@
 func.func @affine_apply_operand_non_index(%arg0 : i32) {
   // Custom parser automatically assigns all arguments the `index` so we must
   // use the generic syntax here to exercise the verifier.
-  // expected-error@+1 {{op operand #0 must be index, but got 'i32'}}
+  // expected-error@+1 {{op operand #0 must be variadic of index, but got 'i32'}}
   %0 = "affine.apply"(%arg0) {map = affine_map<(d0) -> (d0)>} : (i32) -> (index)
   return
 }

mlir/test/Dialect/LLVMIR/invalid.mlir

@@ -306,7 +306,7 @@ func.func @call_non_llvm() {
 // -----
 
 func.func @call_non_llvm_arg(%arg0 : tensor<*xi32>) {
-  // expected-error@+1 {{'llvm.call' op operand #0 must be LLVM dialect-compatible type}}
+  // expected-error@+1 {{'llvm.call' op operand #0 must be variadic of LLVM dialect-compatible type}}
   "llvm.call"(%arg0) : (tensor<*xi32>) -> ()
   llvm.return
 }

mlir/test/Dialect/Linalg/invalid.mlir

@@ -345,7 +345,7 @@ func.func @illegal_fill_memref_with_tensor_return
 func.func @illegal_fill_tensor_with_memref_return
   (%arg0 : tensor<?x?xf32>, %arg1 : f32) -> memref<?x?xf32>
 {
-  // expected-error @+1 {{result #0 must be ranked tensor of any type values, but got 'memref<?x?xf32>'}}
+  // expected-error @+1 {{result #0 must be variadic of ranked tensor of any type values, but got 'memref<?x?xf32>'}}
   %0 = linalg.fill ins(%arg1 : f32) outs(%arg0 : tensor<?x?xf32>) -> memref<?x?xf32>
   return %0 : memref<?x?xf32>
 }

mlir/test/IR/operand.mlir

@@ -13,7 +13,7 @@ func.func @correct_variadic_operand(%arg0: tensor<f32>, %arg1: f32) {
 // -----
 
 func.func @error_in_first_variadic_operand(%arg0: tensor<f32>, %arg1: f32) {
-  // expected-error @+1 {{operand #1 must be tensor of any type}}
+  // expected-error @+1 {{operand #1 must be variadic of tensor of any type}}
   "test.mixed_normal_variadic_operand"(%arg0, %arg1, %arg0, %arg0, %arg0) : (tensor<f32>, f32, tensor<f32>, tensor<f32>, tensor<f32>) -> ()
   return
 }
@@ -29,7 +29,7 @@ func.func @error_in_normal_operand(%arg0: tensor<f32>, %arg1: f32) {
 // -----
 
 func.func @error_in_second_variadic_operand(%arg0: tensor<f32>, %arg1: f32) {
-  // expected-error @+1 {{operand #3 must be tensor of any type}}
+  // expected-error @+1 {{operand #3 must be variadic of tensor of any type}}
   "test.mixed_normal_variadic_operand"(%arg0, %arg0, %arg0, %arg1, %arg0) : (tensor<f32>, tensor<f32>, tensor<f32>, f32, tensor<f32>) -> ()
   return
 }

mlir/test/IR/result.mlir

@@ -13,7 +13,7 @@ func.func @correct_variadic_result() -> tensor<f32> {
 // -----
 
 func.func @error_in_first_variadic_result() -> tensor<f32> {
-  // expected-error @+1 {{result #1 must be tensor of any type}}
+  // expected-error @+1 {{result #1 must be variadic of tensor of any type}}
   %0:5 = "test.mixed_normal_variadic_result"() : () -> (tensor<f32>, f32, tensor<f32>, tensor<f32>, tensor<f32>)
   return %0#4 : tensor<f32>
 }
@@ -29,7 +29,7 @@ func.func @error_in_normal_result() -> tensor<f32> {
 // -----
 
 func.func @error_in_second_variadic_result() -> tensor<f32> {
-  // expected-error @+1 {{result #3 must be tensor of any type}}
+  // expected-error @+1 {{result #3 must be variadic of tensor of any type}}
   %0:5 = "test.mixed_normal_variadic_result"() : () -> (tensor<f32>, tensor<f32>, tensor<f32>, f32, tensor<f32>)
   return %0#4 : tensor<f32>
 }