Diego Novillo wrote: > On Fri, Nov 28, 2008 at 05:58, Andrew Haley <aph@xxxxxxxxxx> wrote: > >> That's interesting. tree-dce is Dead Code Elimination on trees, where >> gcc removes code that can't possibly be reached. > > Strictly speaking, DCE removes code that can't possibly affect the > output of the program. Unreachable code is removed by the CFG cleanup > helper. Apologies for nitpicking, but this distinction is handled in > two different spots in the compiler, so it may affect what files/dumps > you need to look at. Thanks for the nitpick -- input always appreciated! -- but we already know this is dce, having discovered that disabling dce fixes the problem, so the dce dumps are what we need to inspect. I guess it's possible, though, that a dce change causes a later pass to do something different. Andrew.
