Hi,

When I compile the following code with no optimization, the code works good. But when I compile with optimization, the code works strange.

<code>
struct S {
    ubyte a, b, c, d;
}

int hoge(S s) {
    printf("%x\n", s);
    return 0;
}

int main() {
    for (int i = 0; i < 1; i++) {
        S s;
        s.a = 1;
        s.b = 2;
        s.c = 3;
        s.d = 4;
        hoge(s);
    }
    return 0;
}
</code>

This bug occurs on Windows and Linux. You can reproduce this bug in the following way:

> dmd d.d
gcc d.o -o d -lphobos -lpthread -lm
> ./d
4030201
> dmd -O d.d
gcc d.o -o d -lphobos -lpthread -lm
> ./d
1

added to dstress as: svn://svn.kuehne.cn/dstress/run/struct_14.d svn://svn.kuehne.cn/dstress/run/struct_15.d

Thomas

shinichiro.h schrieb:
> Hi,
>
> When I compile the following code with no optimization, the code works good. But when I compile with optimization, the code works strange.
>
> <code>
> struct S {
>     ubyte a, b, c, d;
> }
>
> int hoge(S s) {
>     printf("%x\n", s);
>     return 0;
> }
>
> int main() {
>     for (int i = 0; i < 1; i++) {
>         S s;
>         s.a = 1;
>         s.b = 2;
>         s.c = 3;
>         s.d = 4;
>         hoge(s);
>     }
>     return 0;
> }
> </code>
>
> This bug occurs on Windows and Linux. You can reproduce this bug in the following way:
>
> > dmd d.d
> gcc d.o -o d -lphobos -lpthread -lm
> > ./d
> 4030201
> > dmd -O d.d
> gcc d.o -o d -lphobos -lpthread -lm
> > ./d
> 1