COMPUTER SYSTEMS&MOD MSGT/ET SA AC PKG
3rd Edition
ISBN: 9780134671123
Author: Bryant
Publisher: PEARSON
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Chapter 5.1, Problem 5.1PP
Program Plan Intro
Given C code:
void swap(long *xp, long *yp)
{
*xp = *xp + *yp;
*yp = *xp - *yp;
*xp = *xp - *yp;
}
Memory aliasing:
- It denotes a case where two pointers might designate to memory location that is same.
- The compiler should assume that unlike pointers might be aliased for safe optimizations.
- The program aspects that could limit chances for a compiler in generating optimized code denote optimization blockers.
- If a compiler is unable to determine whether two pointers might be aliased, it should adopt that either case would be possible.
- The possible optimization set is been limited in this case.
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