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Re: GC, variable optimized away wrongly?

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Re: GC, variable optimized away wrongly?

Subject: Re: GC, variable optimized away wrongly?
From: Greg Guerin <email@hidden>
Date: Wed, 25 Nov 2009 10:26:40 -0700

Nick Rogers wrote:

NSTimeInterval etaDouble = interval * ((totalBlocks - blockCount) / blockCount); // * debugger doesn't list this variable, mouse shows a pop up saying "variable optimized away by compiler" int eta = (int)etaDouble; // value is 0 here instead of something

What are the types of totalBlocks and blockCount?

Have you confirmed, say by NSLog'ing it, that the value of etaDouble has a non-zero integer part?

If you NSLog etaDouble, or use it in any way that affects anything outside the 'for' block, it won't be optimized away.

  -- GG

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