mlir/include/mlir/Dialect/SPIRV/IR/SPIRVMemoryOps.td - llvm-project - Git at Google

 //===-- SPIRVMemoryOps.td - MLIR SPIR-V Memory Ops ---------*- tablegen -*-===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 //
 // This file contains memory ops for the SPIR-V dialect. It corresponds
 // to "3.32.8. Memory Instructions" of the SPIR-V spec.
 //
 //===----------------------------------------------------------------------===//

 #ifndef MLIR_DIALECT_SPIRV_IR_MEMORY_OPS
 #define MLIR_DIALECT_SPIRV_IR_MEMORY_OPS

 include "mlir/Dialect/SPIRV/IR/SPIRVBase.td"

 // -----

 def SPV_AccessChainOp : SPV_Op<"AccessChain", [NoSideEffect]> {
   let summary = [{
     Create a pointer into a composite object that can be used with OpLoad
     and OpStore.
   }];

   let description = [{
     Result Type must be an OpTypePointer. Its Type operand must be the type
     reached by walking the Base’s type hierarchy down to the last provided
     index in Indexes, and its Storage Class operand must be the same as the
     Storage Class of Base.

     Base must be a pointer, pointing to the base of a composite object.

     Indexes walk the type hierarchy to the desired depth, potentially down
     to scalar granularity. The first index in Indexes will select the top-
     level member/element/component/element of the base composite. All
     composite constituents use zero-based numbering, as described by their
     OpType… instruction. The second index will apply similarly to that
     result, and so on. Once any non-composite type is reached, there must be
     no remaining (unused) indexes.

      Each index in Indexes

     - must be a scalar integer type,

     - is treated as a signed count, and

     - must be an OpConstant when indexing into a structure.

     <!-- End of AutoGen section -->
     ```
     access-chain-op ::= ssa-id `=` `spv.AccessChain` ssa-use
                         `[` ssa-use (',' ssa-use)* `]`
                         `:` pointer-type
     ```

     #### Example:

     ```mlir
     %0 = "spv.Constant"() { value = 1: i32} : () -> i32
     %1 = spv.Variable : !spv.ptr<!spv.struct<f32, !spv.array<4xf32>>, Function>
     %2 = spv.AccessChain %1[%0] : !spv.ptr<!spv.struct<f32, !spv.array<4xf32>>, Function>
     %3 = spv.Load "Function" %2 ["Volatile"] : !spv.array<4xf32>
     ```
   }];

   let arguments = (ins
     SPV_AnyPtr:$base_ptr,
     Variadic<SPV_Integer>:$indices
   );

   let results = (outs
     SPV_AnyPtr:$component_ptr
   );

   let builders = [OpBuilder<(ins "Value":$basePtr, "ValueRange":$indices)>];

   let hasCanonicalizer = 1;
 }

 // -----

 def SPV_CopyMemoryOp : SPV_Op<"CopyMemory", []> {
   let summary = [{
     Copy from the memory pointed to by Source to the memory pointed to by
     Target. Both operands must be non-void pointers and having the same <id>
     Type operand in their OpTypePointer type declaration.  Matching Storage
     Class is not required.  The amount of memory copied is the size of the
     type pointed to. The copied type must have a fixed size; i.e., it must
     not be, nor include, any OpTypeRuntimeArray types.
   }];

   let description = [{
     If present, any Memory Operands must begin with a memory operand
     literal. If not present, it is the same as specifying the memory operand
     None. Before version 1.4, at most one memory operands mask can be
     provided. Starting with version 1.4 two masks can be provided, as
     described in Memory Operands. If no masks or only one mask is present,
     it applies to both Source and Target. If two masks are present, the
     first applies to Target and cannot include MakePointerVisible, and the
     second applies to Source and cannot include MakePointerAvailable.

     <!-- End of AutoGen section -->

     ```
     copy-memory-op ::= `spv.CopyMemory ` storage-class ssa-use
                        storage-class ssa-use
                        (`[` memory-access `]` (`, [` memory-access `]`)?)?
                        ` : ` spirv-element-type
     ```

     #### Example:

     ```mlir
     %0 = spv.Variable : !spv.ptr<f32, Function>
     %1 = spv.Variable : !spv.ptr<f32, Function>
     spv.CopyMemory "Function" %0, "Function" %1 : f32
     ```
   }];

   let arguments = (ins
     SPV_AnyPtr:$target,
     SPV_AnyPtr:$source,
     OptionalAttr<SPV_MemoryAccessAttr>:$memory_access,
     OptionalAttr<I32Attr>:$alignment,
     OptionalAttr<SPV_MemoryAccessAttr>:$source_memory_access,
     OptionalAttr<I32Attr>:$source_alignment
   );

   let results = (outs);

   let verifier = [{ return verifyCopyMemory(*this); }];

   let autogenSerialization = 0;
 }

 // -----

 def SPV_InBoundsPtrAccessChainOp : SPV_Op<"InBoundsPtrAccessChain", [NoSideEffect]> {
   let summary = [{
     Has the same semantics as OpPtrAccessChain, with the addition that the
     resulting pointer is known to point within the base object.
   }];

   let description = [{


     <!-- End of AutoGen section -->

     ```
     access-chain-op ::= ssa-id `=` `spv.InBoundsPtrAccessChain` ssa-use
                         `[` ssa-use (',' ssa-use)* `]`
                         `:` pointer-type
     ```mlir

     #### Example:

     ```
     func @inbounds_ptr_access_chain(%arg0: !spv.ptr<f32, CrossWorkgroup>, %arg1 : i64) -> () {
       %0 = spv.InBoundsPtrAccessChain %arg0[%arg1] : !spv.ptr<f32, CrossWorkgroup>, i64
       ...
     }
     ```
   }];

   let availability = [
     MinVersion<SPV_V_1_0>,
     MaxVersion<SPV_V_1_5>,
     Extension<[]>,
     Capability<[SPV_C_Addresses]>
   ];

   let arguments = (ins
     SPV_AnyPtr:$base_ptr,
     SPV_Integer:$element,
     Variadic<SPV_Integer>:$indices
   );

   let results = (outs
     SPV_AnyPtr:$result
   );

   let builders = [OpBuilder<(ins "Value":$basePtr, "Value":$element, "ValueRange":$indices)>];
 }

 // -----

 def SPV_LoadOp : SPV_Op<"Load", []> {
   let summary = "Load through a pointer.";

   let description = [{
     Result Type is the type of the loaded object. It must be a type with
     fixed size; i.e., it cannot be, nor include, any OpTypeRuntimeArray
     types.

     Pointer is the pointer to load through.  Its type must be an
     OpTypePointer whose Type operand is the same as Result Type.

     If present, any Memory Operands must begin with a memory operand
     literal. If not present, it is the same as specifying the memory operand
     None.

     <!-- End of AutoGen section -->

     ```
     memory-access ::= `"None"` | `"Volatile"` | `"Aligned", ` integer-literal
                     | `"NonTemporal"`

     load-op ::= ssa-id ` = spv.Load ` storage-class ssa-use
                 (`[` memory-access `]`)? ` : ` spirv-element-type
     ```

     #### Example:

     ```mlir
     %0 = spv.Variable : !spv.ptr<f32, Function>
     %1 = spv.Load "Function" %0 : f32
     %2 = spv.Load "Function" %0 ["Volatile"] : f32
     %3 = spv.Load "Function" %0 ["Aligned", 4] : f32
     ```
   }];

   let arguments = (ins
     SPV_AnyPtr:$ptr,
     OptionalAttr<SPV_MemoryAccessAttr>:$memory_access,
     OptionalAttr<I32Attr>:$alignment
   );

   let results = (outs
     SPV_Type:$value
   );

   let builders = [
     OpBuilder<(ins "Value":$basePtr,
       CArg<"MemoryAccessAttr", "{}">:$memory_access,
       CArg<"IntegerAttr", "{}">:$alignment)>
   ];
 }

 // -----

 def SPV_PtrAccessChainOp : SPV_Op<"PtrAccessChain", [NoSideEffect]> {
   let summary = [{
     Has the same semantics as OpAccessChain, with the addition of the
     Element operand.
   }];

   let description = [{
     Element is used to do an initial dereference of Base: Base is treated as
     the address of an element in an array, and a new element address is
     computed from Base and Element to become the OpAccessChain Base to
     dereference as per OpAccessChain. This computed Base has the same type
     as the originating Base.

     To compute the new element address, Element is treated as a signed count
     of elements E, relative to the original Base element B, and the address
     of element B + E is computed using enough precision to avoid overflow
     and underflow. For objects in the Uniform, StorageBuffer, or
     PushConstant storage classes, the element's address or location is
     calculated using a stride, which will be the Base-type's Array Stride if
     the Base type is decorated with ArrayStride. For all other objects, the
     implementation calculates the element's address or location.

     With one exception, undefined behavior results when B + E is not an
     element in the same array (same innermost array, if array types are
     nested) as B. The exception being when B + E = L, where L is the length
     of the array: the address computation for element L is done with the
     same stride as any other B + E computation that stays within the array.

     Note: If Base is typed to be a pointer to an array and the desired
     operation is to select an element of that array, OpAccessChain should be
     directly used, as its first Index selects the array element.

     <!-- End of AutoGen section -->

     ```
     [access-chain-op ::= ssa-id `=` `spv.PtrAccessChain` ssa-use
                         `[` ssa-use (',' ssa-use)* `]`
                         `:` pointer-type
     ```mlir

     #### Example:

     ```
     func @ptr_access_chain(%arg0: !spv.ptr<f32, CrossWorkgroup>, %arg1 : i64) -> () {
       %0 = spv.PtrAccessChain %arg0[%arg1] : !spv.ptr<f32, CrossWorkgroup>, i64
       ...
     }
     ```
   }];

   let availability = [
     MinVersion<SPV_V_1_0>,
     MaxVersion<SPV_V_1_5>,
     Extension<[]>,
     Capability<[SPV_C_Addresses, SPV_C_PhysicalStorageBufferAddresses, SPV_C_VariablePointers, SPV_C_VariablePointersStorageBuffer]>
   ];

   let arguments = (ins
     SPV_AnyPtr:$base_ptr,
     SPV_Integer:$element,
     Variadic<SPV_Integer>:$indices
   );

   let results = (outs
     SPV_AnyPtr:$result
   );

   let builders = [OpBuilder<(ins "Value":$basePtr, "Value":$element, "ValueRange":$indices)>];
 }

 // -----

 def SPV_StoreOp : SPV_Op<"Store", []> {
   let summary = "Store through a pointer.";

   let description = [{
     Pointer is the pointer to store through.  Its type must be an
     OpTypePointer whose Type operand is the same as the type of Object.

     Object is the object to store.

     If present, any Memory Operands must begin with a memory operand
     literal. If not present, it is the same as specifying the memory operand
     None.

     <!-- End of AutoGen section -->

     ```
     store-op ::= `spv.Store ` storage-class ssa-use `, ` ssa-use `, `
                   (`[` memory-access `]`)? `:` spirv-element-type
     ```

     #### Example:

     ```mlir
     %0 = spv.Variable : !spv.ptr<f32, Function>
     %1 = spv.FMul ... : f32
     spv.Store "Function" %0, %1 : f32
     spv.Store "Function" %0, %1 ["Volatile"] : f32
     spv.Store "Function" %0, %1 ["Aligned", 4] : f32
     ```
   }];

   let arguments = (ins
     SPV_AnyPtr:$ptr,
     SPV_Type:$value,
     OptionalAttr<SPV_MemoryAccessAttr>:$memory_access,
     OptionalAttr<I32Attr>:$alignment
   );

   let results = (outs);

   let builders = [
     OpBuilder<(ins "Value":$ptr, "Value":$value,
       CArg<"ArrayRef<NamedAttribute>", "{}">:$namedAttrs),
     [{
       $_state.addOperands(ptr);
       $_state.addOperands(value);
       $_state.addAttributes(namedAttrs);
     }]>
   ];
 }

 // -----

 def SPV_VariableOp : SPV_Op<"Variable", []> {
   let summary = [{
     Allocate an object in memory, resulting in a pointer to it, which can be
     used with OpLoad and OpStore.
   }];

   let description = [{
     Result Type must be an OpTypePointer. Its Type operand is the type of
     object in memory.

     Storage Class is the Storage Class of the memory holding the object.
     Since the op is used to model function-level variables, the storage class
     must be the `Function` Storage Class.

     Initializer is optional. If Initializer is present, it will be the
     initial value of the variable’s memory content. Initializer must be an
     <id> from a constant instruction or a global (module scope) OpVariable
     instruction. Initializer must have the same type as the type pointed to
     by Result Type.

     <!-- End of AutoGen section -->

     ```
     variable-op ::= ssa-id `=` `spv.Variable` (`init(` ssa-use `)`)?
                     attribute-dict? `:` spirv-pointer-type
     ```

     where `init` specifies initializer.

     #### Example:

     ```mlir
     %0 = spv.Constant ...

     %1 = spv.Variable : !spv.ptr<f32, Function>
     %2 = spv.Variable init(%0): !spv.ptr<f32, Function>
     ```
   }];

   let arguments = (ins
     SPV_StorageClassAttr:$storage_class,
     Optional<AnyType>:$initializer
   );

   let results = (outs
     SPV_AnyPtr:$pointer
   );
 }

 #endif // MLIR_DIALECT_SPIRV_IR_MEMORY_OPS
	//===-- SPIRVMemoryOps.td - MLIR SPIR-V Memory Ops ---------- tablegen --===//
	//
	// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
	// See https://llvm.org/LICENSE.txt for license information.
	// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
	//
	//===----------------------------------------------------------------------===//
	//
	// This file contains memory ops for the SPIR-V dialect. It corresponds
	// to "3.32.8. Memory Instructions" of the SPIR-V spec.
	//
	//===----------------------------------------------------------------------===//

	#ifndef MLIR_DIALECT_SPIRV_IR_MEMORY_OPS
	#define MLIR_DIALECT_SPIRV_IR_MEMORY_OPS

	include "mlir/Dialect/SPIRV/IR/SPIRVBase.td"

	// -----

	def SPV_AccessChainOp : SPV_Op<"AccessChain", [NoSideEffect]> {
	let summary = [{
	Create a pointer into a composite object that can be used with OpLoad
	and OpStore.
	}];

	let description = [{
	Result Type must be an OpTypePointer. Its Type operand must be the type
	reached by walking the Base’s type hierarchy down to the last provided
	index in Indexes, and its Storage Class operand must be the same as the
	Storage Class of Base.

	Base must be a pointer, pointing to the base of a composite object.

	Indexes walk the type hierarchy to the desired depth, potentially down
	to scalar granularity. The first index in Indexes will select the top-
	level member/element/component/element of the base composite. All
	composite constituents use zero-based numbering, as described by their
	OpType… instruction. The second index will apply similarly to that
	result, and so on. Once any non-composite type is reached, there must be
	no remaining (unused) indexes.

	Each index in Indexes

	- must be a scalar integer type,

	- is treated as a signed count, and

	- must be an OpConstant when indexing into a structure.

	<!-- End of AutoGen section -->
	```
	access-chain-op ::= ssa-id `=` `spv.AccessChain` ssa-use
	`[` ssa-use (',' ssa-use)* `]`
	`:` pointer-type
	```

	#### Example:

	```mlir
	%0 = "spv.Constant"() { value = 1: i32} : () -> i32
	%1 = spv.Variable : !spv.ptr<!spv.struct<f32, !spv.array<4xf32>>, Function>
	%2 = spv.AccessChain %1[%0] : !spv.ptr<!spv.struct<f32, !spv.array<4xf32>>, Function>
	%3 = spv.Load "Function" %2 ["Volatile"] : !spv.array<4xf32>
	```
	}];

	let arguments = (ins
	SPV_AnyPtr:$base_ptr,
	Variadic<SPV_Integer>:$indices
	);

	let results = (outs
	SPV_AnyPtr:$component_ptr
	);

	let builders = [OpBuilder<(ins "Value":$basePtr, "ValueRange":$indices)>];

	let hasCanonicalizer = 1;
	}

	// -----

	def SPV_CopyMemoryOp : SPV_Op<"CopyMemory", []> {
	let summary = [{
	Copy from the memory pointed to by Source to the memory pointed to by
	Target. Both operands must be non-void pointers and having the same <id>
	Type operand in their OpTypePointer type declaration. Matching Storage
	Class is not required. The amount of memory copied is the size of the
	type pointed to. The copied type must have a fixed size; i.e., it must
	not be, nor include, any OpTypeRuntimeArray types.
	}];

	let description = [{
	If present, any Memory Operands must begin with a memory operand
	literal. If not present, it is the same as specifying the memory operand
	None. Before version 1.4, at most one memory operands mask can be
	provided. Starting with version 1.4 two masks can be provided, as
	described in Memory Operands. If no masks or only one mask is present,
	it applies to both Source and Target. If two masks are present, the
	first applies to Target and cannot include MakePointerVisible, and the
	second applies to Source and cannot include MakePointerAvailable.

	<!-- End of AutoGen section -->

	```
	copy-memory-op ::= `spv.CopyMemory ` storage-class ssa-use
	storage-class ssa-use
	(`[` memory-access `]` (`, [` memory-access `]`)?)?
	` : ` spirv-element-type
	```

	#### Example:

	```mlir
	%0 = spv.Variable : !spv.ptr<f32, Function>
	%1 = spv.Variable : !spv.ptr<f32, Function>
	spv.CopyMemory "Function" %0, "Function" %1 : f32
	```
	}];

	let arguments = (ins
	SPV_AnyPtr:$target,
	SPV_AnyPtr:$source,
	OptionalAttr<SPV_MemoryAccessAttr>:$memory_access,
	OptionalAttr<I32Attr>:$alignment,
	OptionalAttr<SPV_MemoryAccessAttr>:$source_memory_access,
	OptionalAttr<I32Attr>:$source_alignment
	);

	let results = (outs);

	let verifier = [{ return verifyCopyMemory(*this); }];

	let autogenSerialization = 0;
	}

	// -----

	def SPV_InBoundsPtrAccessChainOp : SPV_Op<"InBoundsPtrAccessChain", [NoSideEffect]> {
	let summary = [{
	Has the same semantics as OpPtrAccessChain, with the addition that the
	resulting pointer is known to point within the base object.
	}];

	let description = [{


	<!-- End of AutoGen section -->

	```
	access-chain-op ::= ssa-id `=` `spv.InBoundsPtrAccessChain` ssa-use
	`[` ssa-use (',' ssa-use)* `]`
	`:` pointer-type
	```mlir

	#### Example:

	```
	func @inbounds_ptr_access_chain(%arg0: !spv.ptr<f32, CrossWorkgroup>, %arg1 : i64) -> () {
	%0 = spv.InBoundsPtrAccessChain %arg0[%arg1] : !spv.ptr<f32, CrossWorkgroup>, i64
	...
	}
	```
	}];

	let availability = [
	MinVersion<SPV_V_1_0>,
	MaxVersion<SPV_V_1_5>,
	Extension<[]>,
	Capability<[SPV_C_Addresses]>
	];

	let arguments = (ins
	SPV_AnyPtr:$base_ptr,
	SPV_Integer:$element,
	Variadic<SPV_Integer>:$indices
	);

	let results = (outs
	SPV_AnyPtr:$result
	);

	let builders = [OpBuilder<(ins "Value":$basePtr, "Value":$element, "ValueRange":$indices)>];
	}

	// -----

	def SPV_LoadOp : SPV_Op<"Load", []> {
	let summary = "Load through a pointer.";

	let description = [{
	Result Type is the type of the loaded object. It must be a type with
	fixed size; i.e., it cannot be, nor include, any OpTypeRuntimeArray
	types.

	Pointer is the pointer to load through. Its type must be an
	OpTypePointer whose Type operand is the same as Result Type.

	If present, any Memory Operands must begin with a memory operand
	literal. If not present, it is the same as specifying the memory operand
	None.

	<!-- End of AutoGen section -->

	```
	memory-access ::= `"None"` \| `"Volatile"` \| `"Aligned", ` integer-literal
	\| `"NonTemporal"`

	load-op ::= ssa-id ` = spv.Load ` storage-class ssa-use
	(`[` memory-access `]`)? ` : ` spirv-element-type
	```

	#### Example:

	```mlir
	%0 = spv.Variable : !spv.ptr<f32, Function>
	%1 = spv.Load "Function" %0 : f32
	%2 = spv.Load "Function" %0 ["Volatile"] : f32
	%3 = spv.Load "Function" %0 ["Aligned", 4] : f32
	```
	}];

	let arguments = (ins
	SPV_AnyPtr:$ptr,
	OptionalAttr<SPV_MemoryAccessAttr>:$memory_access,
	OptionalAttr<I32Attr>:$alignment
	);

	let results = (outs
	SPV_Type:$value
	);

	let builders = [
	OpBuilder<(ins "Value":$basePtr,
	CArg<"MemoryAccessAttr", "{}">:$memory_access,
	CArg<"IntegerAttr", "{}">:$alignment)>
	];
	}

	// -----

	def SPV_PtrAccessChainOp : SPV_Op<"PtrAccessChain", [NoSideEffect]> {
	let summary = [{
	Has the same semantics as OpAccessChain, with the addition of the
	Element operand.
	}];

	let description = [{
	Element is used to do an initial dereference of Base: Base is treated as
	the address of an element in an array, and a new element address is
	computed from Base and Element to become the OpAccessChain Base to
	dereference as per OpAccessChain. This computed Base has the same type
	as the originating Base.

	To compute the new element address, Element is treated as a signed count
	of elements E, relative to the original Base element B, and the address
	of element B + E is computed using enough precision to avoid overflow
	and underflow. For objects in the Uniform, StorageBuffer, or
	PushConstant storage classes, the element's address or location is
	calculated using a stride, which will be the Base-type's Array Stride if
	the Base type is decorated with ArrayStride. For all other objects, the
	implementation calculates the element's address or location.

	With one exception, undefined behavior results when B + E is not an
	element in the same array (same innermost array, if array types are
	nested) as B. The exception being when B + E = L, where L is the length
	of the array: the address computation for element L is done with the
	same stride as any other B + E computation that stays within the array.

	Note: If Base is typed to be a pointer to an array and the desired
	operation is to select an element of that array, OpAccessChain should be
	directly used, as its first Index selects the array element.

	<!-- End of AutoGen section -->

	```
	[access-chain-op ::= ssa-id `=` `spv.PtrAccessChain` ssa-use
	`[` ssa-use (',' ssa-use)* `]`
	`:` pointer-type
	```mlir

	#### Example:

	```
	func @ptr_access_chain(%arg0: !spv.ptr<f32, CrossWorkgroup>, %arg1 : i64) -> () {
	%0 = spv.PtrAccessChain %arg0[%arg1] : !spv.ptr<f32, CrossWorkgroup>, i64
	...
	}
	```
	}];

	let availability = [
	MinVersion<SPV_V_1_0>,
	MaxVersion<SPV_V_1_5>,
	Extension<[]>,
	Capability<[SPV_C_Addresses, SPV_C_PhysicalStorageBufferAddresses, SPV_C_VariablePointers, SPV_C_VariablePointersStorageBuffer]>
	];

	let arguments = (ins
	SPV_AnyPtr:$base_ptr,
	SPV_Integer:$element,
	Variadic<SPV_Integer>:$indices
	);

	let results = (outs
	SPV_AnyPtr:$result
	);

	let builders = [OpBuilder<(ins "Value":$basePtr, "Value":$element, "ValueRange":$indices)>];
	}

	// -----

	def SPV_StoreOp : SPV_Op<"Store", []> {
	let summary = "Store through a pointer.";

	let description = [{
	Pointer is the pointer to store through. Its type must be an
	OpTypePointer whose Type operand is the same as the type of Object.

	Object is the object to store.

	If present, any Memory Operands must begin with a memory operand
	literal. If not present, it is the same as specifying the memory operand
	None.

	<!-- End of AutoGen section -->

	```
	store-op ::= `spv.Store ` storage-class ssa-use `, ` ssa-use `, `
	(`[` memory-access `]`)? `:` spirv-element-type
	```

	#### Example:

	```mlir
	%0 = spv.Variable : !spv.ptr<f32, Function>
	%1 = spv.FMul ... : f32
	spv.Store "Function" %0, %1 : f32
	spv.Store "Function" %0, %1 ["Volatile"] : f32
	spv.Store "Function" %0, %1 ["Aligned", 4] : f32
	```
	}];

	let arguments = (ins
	SPV_AnyPtr:$ptr,
	SPV_Type:$value,
	OptionalAttr<SPV_MemoryAccessAttr>:$memory_access,
	OptionalAttr<I32Attr>:$alignment
	);

	let results = (outs);

	let builders = [
	OpBuilder<(ins "Value":$ptr, "Value":$value,
	CArg<"ArrayRef<NamedAttribute>", "{}">:$namedAttrs),
	[{
	$_state.addOperands(ptr);
	$_state.addOperands(value);
	$_state.addAttributes(namedAttrs);
	}]>
	];
	}

	// -----

	def SPV_VariableOp : SPV_Op<"Variable", []> {
	let summary = [{
	Allocate an object in memory, resulting in a pointer to it, which can be
	used with OpLoad and OpStore.
	}];

	let description = [{
	Result Type must be an OpTypePointer. Its Type operand is the type of
	object in memory.

	Storage Class is the Storage Class of the memory holding the object.
	Since the op is used to model function-level variables, the storage class
	must be the `Function` Storage Class.

	Initializer is optional. If Initializer is present, it will be the
	initial value of the variable’s memory content. Initializer must be an
	<id> from a constant instruction or a global (module scope) OpVariable
	instruction. Initializer must have the same type as the type pointed to
	by Result Type.

	<!-- End of AutoGen section -->

	```
	variable-op ::= ssa-id `=` `spv.Variable` (`init(` ssa-use `)`)?
	attribute-dict? `:` spirv-pointer-type
	```

	where `init` specifies initializer.

	#### Example:

	```mlir
	%0 = spv.Constant ...

	%1 = spv.Variable : !spv.ptr<f32, Function>
	%2 = spv.Variable init(%0): !spv.ptr<f32, Function>
	```
	}];

	let arguments = (ins
	SPV_StorageClassAttr:$storage_class,
	Optional<AnyType>:$initializer
	);

	let results = (outs
	SPV_AnyPtr:$pointer
	);
	}

	#endif // MLIR_DIALECT_SPIRV_IR_MEMORY_OPS