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Here's a new version of the RFC, incorporating and addressing the feedback from Krzysztof, Eli, Duncan, and Dan. Revision 1 changes: * Removed Fusion flag from all sections * Clarified and changed descriptions of remaining flags: * Make 'N' and 'I' flags be explicitly concerning values of operands, and producing undef values if a NaN/Inf is provided. *

...s, if you intend this optimizations to be valid for non-constants? And, it's not clear what you're trying to say about denormal values here. Dan -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20121030/a8e4e04f/attachment.html>

Introduction --- LLVM IR currently does not have any support for specifying fine-grained control over relaxing floating point requirements for the optimizer. The below is a proposal to extend floating point IR instructions to support a number of flags that a creator of IR can use to allow for greater optimizations when desired. Such changes are sometimes referred to as fast-math, but this