Question

define rematerialization and give a code example in c, as well as generated assembly code, illustrating the benefits of rematerialization.

Answer 1

Rematerialization is a performance optimization technique in which a variable is stored and reloaded from memory to reduce memory accesses. Example code and assembly code illustrate this technique's benefits.

Step-by-step explanation:

Rematerialization is a compiler optimization technique where a variable that has been loaded from memory is then stored back into memory, and later reloaded from memory. This technique aims to reduce the number of memory accesses and improve the performance of the program.

Here's an example of rematerialization in C:

int rematerializationExample(int a, int b) {
int c = a + b;
int d = c * 2;
int e = c + d;
return e;
}

When compiled, this C code may generate assembly code that performs rematerialization, resulting in improved performance.