gistfile1.m

// Input

void a() {
    NSNumber *n = @42;
    (void)n;
}

void b() {
    NSNumber *n = [[NSNumber alloc] initWithInt:42];
    (void)n;
}

void c() {
    NSNumber *n = [NSNumber numberWithInt:42];
    (void)n;
}


int main(int argc, const char * argv[]) {
@autoreleasepool {
    a();
    b();
    c();

}
    return 0;
}



// Psuedocode of Compiler Output 

void _a() {
    rax = [NSNumber numberWithInt:0x2a];
    rax = [rax retain];
    rax = [rax release];
    return;
}

void _b() {
    rbx = *objc_msgSend;
    rax = [NSNumber alloc];
    rax = [rax initWithInt:0x2a];
    rax = [rax release];
    return;
}

void _c() {
    rax = [NSNumber numberWithInt:0x2a];
    rax = [rax retain];
    rax = [rax release];
    return;
}

// Psuedocode of +[NSNumber numberWithInt:] 

void * +[NSNumber numberWithInt:](void * self, void * _cmd, int arg2) {
    rdi = self;
    LODWORD(rbx) = LODWORD(arg2);
    if (*___NSNumberTaggedClass != rdi) {
            r14 = *objc_msgSend;
            rdi = [[rdi allocWithZone:0x0] initWithInt:LODWORD(rbx)];
            rax = [rdi autorelease];
    }
    else {
            rax = 0xb000000000000002 | 0xffffffffffffff0 & sign_extend_64(LODWORD(rbx)) << 0x4;
            return rax;
    }
    return rax;
}