Integer promotion does not function as expected

[joesavage]

On my machine the following snippet outputs '1' from its second printf despite the unsigned value of status being reported as '4294967295', and C's integer promotion rules indicating that status should be promoted to an unsigned int for the comparison:

#include <stdio.h>

int main(void) {
    int status = -1;
    unsigned int value = 1;
    printf("%u\n", status);
    printf("%d\n", status < value);
    return 0;
}

[devdeepray]

All operands are being coerced to long before evaluation of infix operators.

    else if (IS_NUMERIC_COERCIBLE(TopValue) && IS_NUMERIC_COERCIBLE(BottomValue))
    {
        /* integer operation */
        long TopInt = ExpressionCoerceInteger(TopValue);
        long BottomInt = ExpressionCoerceInteger(BottomValue);
        switch (Op)
        {
            case TokenAssign:               ResultInt = ExpressionAssignInt(Parser, BottomValue, TopInt, FALSE); break;
            case TokenAddAssign:            ResultInt = ExpressionAssignInt(Parser, BottomValue, BottomInt + TopInt, FALSE); break;
            case TokenSubtractAssign:       ResultInt = ExpressionAssignInt(Parser, BottomValue, BottomInt - TopInt, FALSE); break;
            case TokenMultiplyAssign:       ResultInt = ExpressionAssignInt(Parser, BottomValue, BottomInt * TopInt, FALSE); break;
            case TokenDivideAssign:         ResultInt = ExpressionAssignInt(Parser, BottomValue, BottomInt / TopInt, FALSE); break;
#ifndef NO_MODULUS
            case TokenModulusAssign:        ResultInt = ExpressionAssignInt(Parser, BottomValue, BottomInt % TopInt, FALSE); break;
#endif
            case TokenShiftLeftAssign:      ResultInt = ExpressionAssignInt(Parser, BottomValue, BottomInt << TopInt, FALSE); break;
            case TokenShiftRightAssign:     ResultInt = ExpressionAssignInt(Parser, BottomValue, BottomInt >> TopInt, FALSE); break;
            case TokenArithmeticAndAssign:  ResultInt = ExpressionAssignInt(Parser, BottomValue, BottomInt & TopInt, FALSE); break;
            case TokenArithmeticOrAssign:   ResultInt = ExpressionAssignInt(Parser, BottomValue, BottomInt | TopInt, FALSE); break;
            case TokenArithmeticExorAssign: ResultInt = ExpressionAssignInt(Parser, BottomValue, BottomInt ^ TopInt, FALSE); break;
            case TokenLogicalOr:            ResultInt = BottomInt || TopInt; break;
            case TokenLogicalAnd:           ResultInt = BottomInt && TopInt; break;
            case TokenArithmeticOr:         ResultInt = BottomInt | TopInt; break;
            case TokenArithmeticExor:       ResultInt = BottomInt ^ TopInt; break;
            case TokenAmpersand:            ResultInt = BottomInt & TopInt; break;
            case TokenEqual:                ResultInt = BottomInt == TopInt; break;
            case TokenNotEqual:             ResultInt = BottomInt != TopInt; break;
            case TokenLessThan:             ResultInt = BottomInt < TopInt; break;
            case TokenGreaterThan:          ResultInt = BottomInt > TopInt; break;
            case TokenLessEqual:            ResultInt = BottomInt <= TopInt; break;
            case TokenGreaterEqual:         ResultInt = BottomInt >= TopInt; break;
            case TokenShiftLeft:            ResultInt = BottomInt << TopInt; break;
            case TokenShiftRight:           ResultInt = BottomInt >> TopInt; break;
            case TokenPlus:                 ResultInt = BottomInt + TopInt; break;
            case TokenMinus:                ResultInt = BottomInt - TopInt; break;
            case TokenAsterisk:             ResultInt = BottomInt * TopInt; break;
            case TokenSlash:                ResultInt = BottomInt / TopInt; break;
#ifndef NO_MODULUS
            case TokenModulus:              ResultInt = BottomInt % TopInt; break;
#endif
            default:                        ProgramFail(Parser, "invalid operation"); break;
        }

        ExpressionPushInt(Parser, StackTop, ResultInt);
    }