[cfe-dev] Complex values handling in Clang

[rajesh viswabramana]

Hi All,
Complex values stored in variable
value mismatches if program compiled clang and gcc.

Below is the sample program printing byte by byte stored "complex long long
int" value,

*int main()*
*{*
* _Complex unsigned long long int lli_val= (5668231682443686620ULL +
7618395480654047911ULL*__extension__ 1i);*
*// _Complex long double ld_val = (5668231682443686620ULL +
7618395480654047911ULL*__extension__ 1i);*
* int size = sizeof(lli_val);*
* int index = 0;*
* printf("long long int val:\n");*
* while (size != index)*
* {  *
*    unsigned char cval = (unsigned char)*(((unsigned char*)&lli_val) +
index);*
*    printf("%x", cval);*
*    index++;*
* }*
*}*

Outputs of clang compiled, gcc compiled values are:
For Clang,
long long int val:
*dcb2ab00000a76ad35e0000*
For GCC,
long long int val:
*dcb2ab0af9aa94ea76ad35e53fab969*

Similar behaviour observed for "_Complex float, _Complex double, _Complex
long double" types.
Complex values in clang are not handled in similar to GCC, Could someone
comment about it.



-rajesh
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