[Bug middle-end/122082] complex multiply: w * conj(w) should have zero imaginary part

[kargls at comcast dot net via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122082

kargls at comcast dot net changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |kargls at comcast dot net

--- Comment #1 from kargls at comcast dot net ---
>     assert( FE_OVERFLOW|FE_INEXACT == flags );

What are you testing here?  If the code is changed to

    if (FE_INEXACT & flags)   printf("inexact\n");
    if (FE_OVERFLOW & flags)  printf("overflow\n") ;
    if (FE_UNDERFLOW & flags) printf("underflow\n");
    if (FE_DIVBYZERO & flags) printf("divide-by-zero\n") ;

With clang,

% cc -o z a.c -lm && ./z
inexact
overflow
Assertion failed: ((0.f == cimagf(fc26))), function main, file a.c, line 31.
Abort (core dumped)

With top-of-tree

 ~/work/x/bin/gcc -o z a.c -lm && ./z
inexact
overflow
Assertion failed: ((0.f == cimagf(fc26))), function main, file a.c, line 31.
Abort (core dumped)