Table of Contents
- 1 What is the difference between quadruples and indirect triples?
- 2 What are quadruples in compiler design?
- 3 What are the advantage and disadvantage of quadruple triples and indirect triples?
- 4 What are types and declarations in compiler design?
- 5 What is indirect triple?
- 6 Why are quadruples preferred over triples?
- 7 What is a type checker?
- 8 What is triple in compiler design?
- 9 What are the differences between quadruples and triples?
- 10 What is indindirect triples?
- 11 What are the different types of triple in C++?
What is the difference between quadruples and indirect triples?
Thus, quadruple representation is easier to work with when using an optimizing compiler, which entails a lot of code movement. Indirect triple representation presents no such problems, because a separate list of pointers to the triple structure is maintained.
What are quadruples in compiler design?
The quadruples have four fields to implement the three address code. The field of quadruples contains the name of the operator, the first source operand, the second source operand and the result respectively.
What is quadruple representation?
Quadruple Representation : A statement like param t 1 is represented by placing param in the operator field and t 1 in the operand1 field; neither operand2 nor the result field are used. For example, a quadruple representation of the three-address code for the statement x = (a + b) * – c/d is shown in Table 6.1.
What are the advantage and disadvantage of quadruple triples and indirect triples?
Indirect triples can save some space compared with quadruples if the same temporary value is used more than once. The reason is that two or more entries in the statement array can point to the same line of the op-arg1-arg2 structure.
What are types and declarations in compiler design?
Typical basic types for a language include boolean, char, integer, float, and void; the latter denotes “the absence of a value.” A type name is a type expression. A type expression can be formed by applying the array type constructor to a number and a type expression. A record is a data structure with named fields.
Why are quadruples preferred over triples in an optimizing compiler?
Answer: Quadruples are preferred over triples in an optimizing compiler as instructions are often found to move around in it.
What is indirect triple?
This representation is an enhancement over triples representation. It uses an additional instruction array to list the pointers to the triples in the desired order. Thus, instead of position, pointers are used to store the results.
Why are quadruples preferred over triples?
What is three address code in compiler construction?
Three address code is a type of intermediate code which is easy to generate and can be easily converted to machine code.It makes use of at most three addresses and one operator to represent an expression and the value computed at each instruction is stored in temporary variable generated by compiler.
What is a type checker?
Type checking is the process of verifying and enforcing the constraints of types, and it can occur either at compile time (i.e. statically) or at runtime (i.e. dynamically). Type checking is all about ensuring that the program is type-safe, meaning that the possibility of type errors is kept to a minimum.
What is triple in compiler design?
The triples have three fields to implement the three address code. The field of triples contains the name of the operator, the first source operand and the second source operand. In triples, the results of respective sub-expressions are denoted by the position of expression.
Which triples are listing pointers to triples rather than listing the triples themselves?
Indirect Triples: consist of a listing of pointers to triples, rather than a listing of triples themselves.
What are the differences between quadruples and triples?
Quadruples- 1 Quadruples- In quadruples representation, each instruction is splitted into the following 4 different fields- op, arg1, arg2, result Here- The op field is used for storing the internal code 2 Triples- In triples representation, References to the instructions are made. Temporary variables are not used. 3 Indirect Triples-
What is indindirect triples?
Indirect Triples- This representation is an enhancement over triples representation. It uses an additional instruction array to list the pointers to the triples in the desired order. Thus, instead of position, pointers are used to store the results.
What are the different fields in a quadruples representation?
In quadruples representation, each instruction is splitted into the following 4 different fields- The op field is used for storing the internal code of the operator. The arg1 and arg2 fields are used for storing the two operands used.
What are the different types of triple in C++?
1 Quadruple – It is structure with consist of 4 fields namely op, arg1, arg2 and result. 2 Triples – This representation doesn’t make use of extra temporary variable to represent a single operation instead when a reference to another triple’s value is needed, a pointer to 3 Indirect Triples –