[LLVMdev] Which transform passes to apply?
josh.klontz at gmail.com
Tue Dec 4 17:15:03 PST 2012
Duncan Sands wrote
> Hi Josh,
> instcombine, however this transform is only correct if you are adding -0.0
> so you won't get it without "fast math", and in 3.2 I think it will only
> done by codegen (llc). The situation should be better in 3.3 since a
> of fast-math support started going in to the IR level transforms.
> Please open a bug report since even in mainline this transform isn't done
> (as fast-math support at the IR level only just got going).
> Ciao, Duncan.
Filed under http://llvm.org/bugs/show_bug.cgi?id=14513. The -0.0 trick did
the job in my case. Thanks again!
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