[PATCH] Switch To Select optimization , fixed case with multiple incoming edges from same block

[Hans Wennborg]

After reading the discussion on the previous commit thread, the description doesn't sound completely accurate. I.e. it seems like multiple edges from a bb to a phi is allowed as long as they have the same value.

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Comment at: lib/Transforms/Utils/SimplifyCFG.cpp:3575
@@ +3574,3 @@
+  BasicBlock *SelectBB = SI->getParent();
+  while (PHI->getBasicBlockIndex(SelectBB) >= 0)
+    PHI->removeIncomingValue(SelectBB);
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kariddi wrote:
> This is the only thing that changed from the previous patch, with this becoming a "while" from an "if"
Can you add a test case that covers this?

http://reviews.llvm.org/D5746