src/binaryen/src/ir/count.h

   1 /*
   2  * Copyright 2016 WebAssembly Community Group participants
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 #ifndef wasm_ir_count_h
  18 #define wasm_ir_count_h
  19
  20 namespace wasm {
  21
  22 struct GetLocalCounter : public PostWalker<GetLocalCounter> {
  23   std::vector<Index> num;
  24
  25   GetLocalCounter() {}
  26   GetLocalCounter(Function* func) {
  27     analyze(func, func->body);
  28   }
  29   GetLocalCounter(Function* func, Expression* ast) {
  30     analyze(func, ast);
  31   }
  32
  33   void analyze(Function* func) {
  34     analyze(func, func->body);
  35   }
  36   void analyze(Function* func, Expression* ast) {
  37     num.resize(func->getNumLocals());
  38     std::fill(num.begin(), num.end(), 0);
  39     walk(ast);
  40   }
  41
  42   void visitGetLocal(GetLocal *curr) {
  43     num[curr->index]++;
  44   }
  45 };
  46
  47 } // namespace wasm
  48
  49 #endif // wasm_ir_count_h
  50