#3557 memory overflow on overly generic peep substitutions

[Under4Mhz]

When I run the following code, sdcc pauses for about 30s and is then killed.

I wouldn't necessarily expect sdcc to be able to handle this, but perhaps to give an error in this situation (perhaps with line number of the problem rule).

/// GPL 2.0 or later
#include <stdio.h>

int div64( int a ) {

    return a / 64;
}

int main() {

    printf("Start\n");
    printf("Mult %d", div64( 200 ) );
    printf("End\n");

    return 0;
}


#ifdef __SDCC
__sfr __at 0xff sif;
int putchar( int c ) {

    sif = 'p';
    sif = c;

    return c;
}
#endif

// sdcc -mz80 peep-overflow.c --peep-file ./peep-rules.txt

replace {
    sra %1
    rr  %2
    sra %1
    rr  %2
    sra %1
    rr  %2
    sra %1
    rr  %2
    sra %1
    rr  %2
    sra %1
    rr  %2
} by {
        ld      a, %2
    sra %1
    rra
    sra %1
    rra
    sra %1
    rra
    sra %1
    rra
    sra %1
    rra
    sra %1
    rra
        ld      %2, a
}

time sdcc -mz80 peep-overflow.c --peep-file ./peep-rules.txt
Killed

real    0m33.329s

sdcc -v
SDCC : mcs51/z80/z180/r2k/r2ka/r3ka/sm83/tlcs90/ez80_z80/z80n/ds390/pic16/pic14/TININative/ds400/hc08/s08/stm8/pdk13/pdk14/pdk15/mos6502 TD- 4.2.12 #13827 (Linux)

[Philipp Klaus Krause]

Fixed in [r14554] in the next branch.

[Philipp Klaus Krause]

The next branch has been merged to trunk.