github.com/cloudwego/frugal@v0.1.15/internal/atm/ssa/pos.go (about)

     1  /*
     2   * Copyright 2022 ByteDance Inc.
     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  package ssa
    18  
    19  import (
    20      `fmt`
    21      `math`
    22  )
    23  
    24  const (
    25      _P_term = math.MaxUint32
    26  )
    27  
    28  type Pos struct {
    29      B *BasicBlock
    30      I int
    31  }
    32  
    33  func pos(bb *BasicBlock, i int) Pos {
    34      return Pos { bb, i }
    35  }
    36  
    37  func (self Pos) String() string {
    38      if self.I == _P_term {
    39          return fmt.Sprintf("bb_%d.term", self.B.Id)
    40      } else {
    41          return fmt.Sprintf("bb_%d.ins[%d]", self.B.Id, self.I)
    42      }
    43  }
    44  
    45  func (self Pos) isPriorTo(other Pos) bool {
    46      return self.B.Id < other.B.Id || (self.I < other.I && self.B.Id == other.B.Id)
    47  }