[llvm-commits] [llvm] r95454 - in /llvm/trunk: lib/Transforms/Scalar/LoopUnrollPass.cpp test/CodeGen/X86/nancvt.ll

[Duncan Sands]

Hi Jakob,

>>> Don't unroll loops containing function calls.
>> what is the reasoning behind this?
> 
> A function call is likely to take a significant amount of time, so the relative gain from unrolling the loop is very small. The code size increase is still there, though.

is this based on experimental results?

Ciao,

Duncan.