llvm/lib/Target/WebAssembly/Utils/WasmAddressSpaces.h

   1 //===--- llvm/CodeGen/WasmAddressSpaces.h -----------------------*- C++ -*-===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 //
   9 // Address Spaces for WebAssembly Type Handling
  10 //
  11 //===----------------------------------------------------------------------===//
  12
  13 #ifndef LLVM_LIB_TARGET_WEBASSEMBLY_UTILS_WASMADDRESSSPACES_H
  14 #define LLVM_LIB_TARGET_WEBASSEMBLY_UTILS_WASMADDRESSSPACES_H
  15
  16 namespace llvm {
  17
  18 namespace WebAssembly {
  19
  20 enum WasmAddressSpace : unsigned {
  21   // Default address space, for pointers to linear memory (stack, heap, data).
  22   WASM_ADDRESS_SPACE_DEFAULT = 0,
  23   // A non-integral address space for pointers to named objects outside of
  24   // linear memory: WebAssembly globals or WebAssembly locals.  Loads and stores
  25   // to these pointers are lowered to global.get / global.set or local.get /
  26   // local.set, as appropriate.
  27   WASM_ADDRESS_SPACE_VAR = 1,
  28   // A non-integral address space for externref values
  29   WASM_ADDRESS_SPACE_EXTERNREF = 10,
  30   // A non-integral address space for funcref values
  31   WASM_ADDRESS_SPACE_FUNCREF = 20,
  32 };
  33
  34 inline bool isDefaultAddressSpace(unsigned AS) {
  35   return AS == WASM_ADDRESS_SPACE_DEFAULT;
  36 }
  37 inline bool isWasmVarAddressSpace(unsigned AS) {
  38   return AS == WASM_ADDRESS_SPACE_VAR;
  39 }
  40 inline bool isValidAddressSpace(unsigned AS) {
  41   return isDefaultAddressSpace(AS) || isWasmVarAddressSpace(AS);
  42 }
  43
  44 } // namespace WebAssembly
  45
  46 } // namespace llvm
  47
  48 #endif // LLVM_LIB_TARGET_WEBASSEMBLY_UTILS_WASMADDRESSSPACES_H