#3162 Missing loop optimization and missing debug informations

[Sebastian Riedel]

main.c:

#include <stdint.h>

uint8_t getRandomNumber(){
    uint8_t whatever = 4;
    for(uint8_t i = 0; i < 4; ++i){
        ++whatever;
        --whatever;
    }
    whatever %= 7;
    return whatever;
}

void main(){
    getRandomNumber();
}

compile.sh:

#!/bin/sh
CFLAGS="--debug --nolospre --no-peep --nogcse"
CC="${SDCCBIN}sdcc -mgbz80 --fsigned-char -c ${CFLAGS}"
LD="${SDCCBIN}sdldgb"
mkdir -p build
${CC} -o build/main.rel main.c
${LD} -nmyjwxi build/main.ihx build/main.rel

There are a couple of things going wrong with this main.c

1. Missing debug infos for i if --nogcse is used:
   S:Lmain.getRandomNumber$i$1_0$1({1}SC:U),R,0,0,[]
2. I don’t think whatever %= 7; should be promoted to integer.
3. Loop Reversing only works for for(i = 0; i < 4; ++i)but not for for(uint8_t i = 0; i < 4; ++i)
4. I think --noloopreverse should be enabled by --debug