[llvm-commits] [PATCH][FastMath, InstCombine] Fadd/Fsub optimizations

[Shuxin Yang]

 >By the same logic, why isn't the quota 3 for the case where nothing is 
multi-use? Or are you concerned about the transformation falling into an 
infinite loop?
I only try to optimize "this instruction" along with at most two 
neighboring  instructions.
So the input has at most 3 instr, and the up-bound for the output quota 
is 3-1 = 2.

I don't like to scale this optimization in InstCombine as it supposed to 
be extremely fast.