[llvm-bugs] [Bug 14899] complex divide: finite / zero wrong

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=14899

Richard Smith <richard-llvm at metafoo.co.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |richard-llvm at metafoo.co.uk
         Resolution|---                         |FIXED

--- Comment #1 from Richard Smith <richard-llvm at metafoo.co.uk> ---
With recent Clang:

  (0.0+1.0*I) / (0.0+0.0*I)  gives  -nan + inf i
  (inf+nan*I) / (0.0+0.0*I)  gives  nan  + nan i
  (inf+0.0I*I) / (0.0+0.0*I) gives  inf  + -nan i

The first and third cases look correct. The second yields the wrong answer due
to PR8532; the problem is that nan * I gives nan + nan i because I has type
_Complex double, not _Imaginary double. However, given a nanI which is 0 + nan
i:

  (inf+nanI) / (0.0+0.0*I)  gives  inf  + nan i

So I think this is now fixed. (Please reopen if the above don't look like the
right infinite values for these cases.)

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