[llvm-commits] [patch] Use the new edge dominance functions in GVN

[Rafael Espíndola]

> Did you send the right patch?

Sorry, looks like I created a diff from the wrong branch. One from
trunk is attached.

A quick note on the patch. It still uses a simple dominance check in
GVN. With your previous patch I could now turn the two

+  if (!BBE.isSingleEdge())
+    return false;

into

assert(BBE.isSingleEdge());

and modify GVN to stop earlier if it finds multiple edges. Let me know
what you think.

> -Eli

Cheers,
Rafael
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