[llvm-bugs] [Bug 24818] hoisting expensive ops like FP division is bad for perf

via llvm-bugs llvm-bugs at lists.llvm.org
Tue Dec 15 10:19:41 PST 2015


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

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

--- Comment #9 from Sanjay Patel <spatel+llvm at rotateright.com> ---
Should be fixed with:

We still need to adjust some target-specific instruction costs. For example,
sqrt is considered cheap for x86, and fdiv is considered expensive for GPUs.

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