[PATCH] D19353: [GVN] Replace an inverted comparison with a logical not

[Philip Reames via llvm-commits]

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As a canonicalization, this makes sense, but I'm worried it will lead to bad code generation.  Having to materialize a flag into a register to negate it seems potentially problematic.  Do we already have code in the backend (CGP?) which undoes this transformation?  If not, I think we're likely to need it.


http://reviews.llvm.org/D19353