[llvm-bugs] [Bug 24512] miscompilation of uint32 ->float vector cast on x86 pre-avx

via llvm-bugs llvm-bugs at lists.llvm.org
Fri Aug 21 16:20:01 PDT 2015


Sanjay Patel <spatel+llvm at rotateright.com> changed:

           What    |Removed                     |Added
             Status|NEW                         |RESOLVED
         Resolution|---                         |INVALID

--- Comment #9 from Sanjay Patel <spatel+llvm at rotateright.com> ---
(In reply to comment #8)
> Yes, it was unsafe-fp-math that made the difference. This is described as
> "reduced precision", not "throw away my input entirely" :)

Heh...turning everything into zeros falls under the scope of "unsafe". :)

Seriously though, -ffast-math is license for the compiler to do a lot of
things, and I think we're within bounds on this one.

So I'll resolve this as "invalid". Please reopen if you disagree or see a
better way out.

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