[PATCH] Fixup PHI nodes in LowerSwitch

[Pete]

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Comment at: lib/Transforms/Utils/LowerSwitch.cpp:137
@@ +136,3 @@
+                    BasicBlock *NewNode) {
+ for (BasicBlock::iterator I = Succ->begin(), E = Succ->getFirstNonPHI();
+      I != E; ++I) {
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I don't think this will work when debugging is enabled as phi's aren't always the first instructions in a BB, or even contiguous.

I think you'll need getFirstNonPHIOrDbgOrLifetime(), and then to have the loop skip anything which isn't a phi.

http://reviews.llvm.org/D4298