[LLVMdev] Optimize away sqrt in simple cases?

[Erkki Lindpere]

hi!

I'm using LLVM 3.2. Does it optimize away llvm.pow(llvm.sqrt(x), 2) to `x`
with any settings? I tried with llc -O3, but that didn't do it.

Would be nice to write |v|² in my language ('v' being a 2D vector say and
|...| and ...² being two separate infix "operators") -- when I could
compare squares of lengths as well as lengths, and know that the sqrt is
optimized away.

Erkki
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