#3045 STM8: FATAL Compiler Internal Error + SIGSEGV on simple loop

[Gabriel Ravier]

void f()
{
    int x;
    int y;
    if (x <= y)
        do
            ;
        while (y++ < 10);
}

Compiling this with sdcc test.c -mz80 results in this :

test.c:5: warning 84: 'auto' variable 'x' may be used before initialization
test.c:5: warning 84: 'auto' variable 'x' may be used before initialization
test.c:5: warning 84: 'auto' variable 'y' may be used before initialization
test.c:6: warning 84: 'auto' variable 'y' may be used before initialization
test.c:8: error 9: FATAL Compiler Internal Error in file 'gen.c' line number '1688' : Symbol in register, but no register assigned. 
Contact Author with source code
Symbol iTemp1 at ic 2.
Caught signal 11: SIGSEGV

Tested with commit 11662.

[Gabriel Ravier]

Note : This also crashes with sdcc test.c -ms08, with a Caught signal 11: SIGSEGV

[Gabriel Ravier]

Other extra note : This also crashes with sdcc test.c -mstm8, with this error message :

test.c:5: warning 84: 'auto' variable 'x' may be used before initialization
test.c:5: warning 84: 'auto' variable 'x' may be used before initialization
test.c:5: warning 84: 'auto' variable 'y' may be used before initialization
test.c:6: warning 84: 'auto' variable 'y' may be used before initialization
iTemp1 -4 2 0 0 at ic 2
Backtrace:
sdcc[0x495b87]
sdcc[0x6a2f3d]
sdcc[0x6b9fa4]
sdcc[0x6c5ae2]
sdcc[0x67cfdf]
sdcc[0x42ff0e]
sdcc[0x447e4c]
sdcc[0x40c13e]
sdcc[0x40837c]
/lib64/libc.so.6(__libc_start_main+0xf2)[0x7f0c8d21e042]
sdcc[0x409efe]
test.c:8: error 9: FATAL Compiler Internal Error in file 'gen.c' line number '1129' : Invalid stack offset. 
Contact Author with source code
iTemp1 -4 2 1 0 at ic 2
Backtrace:
sdcc[0x495b87]
sdcc[0x6a2f3d]
sdcc[0x6b9fa4]
sdcc[0x6c5ae2]
sdcc[0x67cfdf]
sdcc[0x42ff0e]
sdcc[0x447e4c]
sdcc[0x40c13e]
sdcc[0x40837c]
/lib64/libc.so.6(__libc_start_main+0xf2)[0x7f0c8d21e042]
sdcc[0x409efe]
test.c:8: error 9: FATAL Compiler Internal Error in file 'gen.c' line number '1129' : Invalid stack offset. 
Contact Author with source code
test.c:8: error 9: FATAL Compiler Internal Error in file 'gen.c' line number '421' : code generator internal error 
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test.c:8: error 9: FATAL Compiler Internal Error in file 'gen.c' line number '421' : code generator internal error 
Contact Author with source code
iTemp1 -4 2 0 0 at ic 17
Backtrace:
sdcc[0x495b87]
sdcc[0x6a2f3d]
sdcc[0x6b616f]
sdcc[0x6c5ae2]
sdcc[0x67cfdf]
sdcc[0x42ff0e]
sdcc[0x447e4c]
sdcc[0x40c13e]
sdcc[0x40837c]
/lib64/libc.so.6(__libc_start_main+0xf2)[0x7f0c8d21e042]
sdcc[0x409efe]
test.c:8: error 9: FATAL Compiler Internal Error in file 'gen.c' line number '1129' : Invalid stack offset. 
Contact Author with source code
iTemp1 -4 2 1 0 at ic 17
Backtrace:
sdcc[0x495b87]
sdcc[0x6a2f3d]
sdcc[0x6b616f]
sdcc[0x6c5ae2]
sdcc[0x67cfdf]
sdcc[0x42ff0e]
sdcc[0x447e4c]
sdcc[0x40c13e]
sdcc[0x40837c]
/lib64/libc.so.6(__libc_start_main+0xf2)[0x7f0c8d21e042]
sdcc[0x409efe]
test.c:8: error 9: FATAL Compiler Internal Error in file 'gen.c' line number '1129' : Invalid stack offset. 
Contact Author with source code
test.c:8: error 9: FATAL Compiler Internal Error in file 'gen.c' line number '421' : code generator internal error 
Contact Author with source code

[Erik Petrich]

Revision [r11667] fixes all of the problems, except for with the stm8 code generator internal error.

[Erik Petrich]

Remainder of problem fixed with revision [r11670]