Zilog EZ80F916 - Manual (Page 440)

UM014423-0607 Compatibility Issues
ZiLOG Developer Studio II
eZ80Acclaim! ® User Manual
420
#pragma noalias
Disables alias checking. Before using this pragma, be sure that the program does not use
aliases, either directly or indirectly. An alias occurs when two variables can reference the
same memory location. The following example illustrates an alias:
func()
{
int x,*p;
p = &x; /* both
“
x
”
and
“
*p
”
refer to same location */
.
.
.
}
If both *p and x are used below the assignment, then malignant aliases exist and the
NOALIAS switch must not be used. Otherwise, alias is benign, and the NOALIAS switch
can be used.
#pragma cpu
Defines the target processor to the compiler.
#pragma globalcopy
Enables global copy propagation.
#pragma noglobalcopy
Disables global copy propagation.
#pragma globalcse
Enables global common elimination unless local common subexpressions are disabled.
#pragma noglobalcse
Disables global copy subexpression elimination.
#pragma globaldeadvar
Enables global dead variable removal.
#pragma noglobaldeadvar
Disables global dead variable removal.