Why does the Keil compiler generate bad code for the DS400C80?

The following code:
fwsUniChar c;
fwsUniChar *temp;

temp=p->inPtr;
c = *temp;
temp++;
p->inPtr = temp;
correctly increments the pointer p by 0x01


instead of
fwsUniChar c = p->inPtr++;
which incorrectly increments the pointer p by 0x101
This code compiles and runs correctly with ANSI C compilers



Also
routine1() reentrant
{
enum ElementTagType type;

routine2(&type);
}

routine2(enum ElementTagType *type)
{
type = START_TAG;
}


does not work (i.e. type in routine1 is not set to START_TAG after calling routine 2.

There is a default XBPSTACK

Any Ideas

Thanks

Barry