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...merely propagates poison from the second or third, just like any computational instruction would. The icmp is an observation point for both inputs. Pogo -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20111206/acacce9c/attachment.html>

Dan Gohman <gohman at apple.com> writes: > For example, suppose we want to convert the && to &, and the ?: to a > select, in this code: > > if (a && (b ? (c + d) : e)) { > > because we have a CPU architecture with poor branch prediction, or > because we want more ILP, or because of some other reason. Here's what the > LLVM IR for that might