[LLVMdev] [RFC] Extend LLVM IR to express "fast-math" at a per-instruction level

Krzysztof Parzyszek kparzysz at codeaurora.org
Wed Oct 31 07:01:45 PDT 2012

On 10/30/2012 11:36 AM, Michael Ilseman wrote:
> On Oct 30, 2012, at 1:46 AM, Duncan Sands <baldrick at free.fr> wrote:
> 'A' is certainly a bit of a grab-bag, but I had difficulty breaking it apart into finer-grained pieces that a user would want to pick and choose between. I'd be interested in any suggestions you might have along these lines.

For reference (or ideas), here's how the IBM XL compiler breaks down the 
floating point options (look for -qstrict if link doesn't take you there):



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