[sdcc-devel] [ sdcc-Bugs-1571231 ] Integral promotion not performed

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Bugs item #1571231, was opened at 2006-10-05 09:40
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Category: msc51(8051) target
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: miker (mike_robins)
Assigned to: Nobody/Anonymous (nobody)
Summary: Integral promotion not performed

Initial Comment:
SDCC :
mcs51/gbz80/z80/avr/ds390/pic16/pic14/TININative/xa51/ds400/hc08
2.6.0 #4309 (Jul 28 2006) (MINGW32)

Using "sdcc -mmcs51 -S b.c"

extern unsigned char x, y;

char foo(void)
{
    if (x + y != 0)
    {
        return 1;
    }
    return 0;
}

char bar(void)
{
    if (x + y)
    {
        return 1;
    }
    return 0;
}

No errors or warnings are produced.

Integral promotion is performed in foo(), but not in
bar(). If x and y are both 0x80, foo() correctly
returns 1 whereas bar() incorrectly returns 0.


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