[LLVMdev] [cfe-dev] computing a conservatively rounded square of a double

[Robinson, Paul]

While I did propose a patch to add this attribute to Clang, and it was approved, I never committed it because the LLVM work to fully support it has been dangling in nobody-wants-to-review-it limbo forever.  And it seemed like I shouldn't put the attribute into Clang if LLVM didn't fully honor the contract.

I'll redo the Clang part (Aaron Ballman has refactored the attribute-handling stuff about a hundred times since I did the original patch so it no longer applies) and hopefully get that into Clang soon.
Thanks,
--paulr

Geoffrey - In the short term, if you marked this function as "__attribute__((optnone))", that might have the effect you desire.  See http://clang-developers.42468.n3.nabble.com/RFC-add-Function-Attribute-to-disable-optimization-td4032641.html


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