[LLVMbugs] [Bug 14221] SQRTSS and similar scalar SSE insns are not accurately modelled

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=14221

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

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

--- Comment #7 from Sanjay Patel <spatel+llvm at rotateright.com> ---
sqrtsd patch committed here:
http://llvm.org/viewvc/llvm-project?view=revision&revision=227111

As noted in the review for this patch (http://reviews.llvm.org/D6885), by tying
the source and dest regs, we've introduced a small SSE perf regression in the
case where we need to use the original operand and the result.

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