#2981 SIGSEGV at for

[Dmitry Kharitonov]

d:\Infocom\LED_clock\firmware\bug>sdcc -mmcs51 --opt-code-size --model-small --Werror --no-xinit-opt --std-sdcc99 -DPCB=PCB -DF_CPU=12000000 -c -o main.rel main.c
main.c:14: error 9: FATAL Compiler Internal Error in file '/home/sdcc-builder/build/sdcc-build/orig/sdcc/src/SDCCicode.c' line number '813' : code generator internal error
Contact Author with source code
Caught signal 11: SIGSEGV

[Philipp Klaus Krause]

I've simplified the code sample a a bit. I see the same problem for the stm8 and z80 targets, so this doesn't seem mcs51-specific to me:

volatile unsigned char EA;

static inline void iRestore(void)
{
}

#define A(type) for ( type,td=1; td; td = 0, iRestore() )
#define RESTORESTATE unsigned char ea_save = EA

int main(void) {
    unsigned int t;
    A(RESTORESTATE) t=0;
    return 0;
}

[Philipp Klaus Krause]

Further simplification:

static inline void iRestore(void)
{
}

int main(void) {
    for (unsigned char td = 1; td; td = 0, iRestore());
    return 0;
}

[Philipp Klaus Krause]

I can't reproduce this bug in current SDCC. So I just added a regression test in [r13376].