[LLVMdev] LLVM 2.4 problem? (resend)

[Tatu Vaajalahti]

On 15.10.2008, at 13.28, Duncan Sands wrote:

>> With this program llvm-gcc -O2 optimizes test2 away even though it's
>> address is taken in program (gcc-4.2 does not, neither does llvm-gcc
>> with -O or -O0):

I guess this is a bit academic case since you can easily circumvent  
this by marking variables as "static const volatile" or by just not  
initializing the variables to the same value (or leaving the  
initialization out).

Just wanted to report the mismatch between gcc and llvm-gcc :)

> I can confirm that test2 is replaced with test1 everywhere using  
> llvm-gcc
> from svn head.
>
>> #include <stdio.h>
>>
>> static const char test1 = 'x';
>> static const char test2 = 'x';
>>
>> int main(int argc, char **argv)
>> {
>>   printf("%p\n", &test1);
>>   printf("%p\n", &test2);
>>
>>   return 0;
>> }
>
> Ciao,
>
> Duncan.

---
Tatu Vaajalahti
Tampere, Finland