SDCC : mcs51/gbz80/z80/avr/ds390/pic16/pic14/TININative/xa51/ds400/hc08
2.6.1 #4478 (Nov 23 2006) (MINGW32)
When compiling the following snippet for mcs51, both *px translates to
mov dptr,#_x
movx a,@dptr
i.e. *x, which may not be true.
Is this an error or just me being stupid?
Jan Waclawek
PS. In this short test program, I am unable to insert some code modifying
px before "if", to demonstrate that the "if" is not redundant, without
"spoiling the error", but I have a long-long program where this really
happens.
--- code snippet ---
xdata unsigned char *px;
xdata unsigned char x[3];
unsigned char t;
void incrementpx(void) {
px++;
}
void main(void) {
px = x;
if (px == x) {
incrementpx();
t = *px;
} else {
t = *px;
}
}
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