Check Widening in LLVM

If you know Ruby more than you know LLVM and want to see a practical example, I gave a talk about the same idea in the context of Ruby <a href="http:&#x2F;&#x2F;chrisseaton.com&#x2F;rubytruffle&#x2F;deoptimizing&#x2F;" rel="nofollow">http:&#x2F;&#x2F;chrisseaton.com&#x2F;rubytruffle&#x2F;deoptimizing&#x2F;</a>

Why &quot;discard the current runtime frame, and resume execution in the interpreter&quot; rather than jump into a compiled but unoptimized version of the function?

Fascinating stuff! Reminds me very much of swift&#x27;s guard statement.

&gt; Now if arr.length is 1 then we’ll deoptimize to the interpreter with false as the value of 0 u&lt; arr.length<p>How so? Why does the test change?