[PATCH] GVN overflow intrinsics

[Erik Verbruggen]

Hi,

I got distracted for some time, but here is a revised patch to handle overflow-intrinsic instructions following their equivalent non-overflow instruction (and vice-versa). It does not play around with the hashing of either, and does not affect PRE. If a normal VN lookup does not find a leader, it will do a second lookup with the corresponding (non-)overflow-instrinsic to see if that exists, and act on that.

-- Erik.

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