[PATCH] D13274: [WinEH] Clone funclets with multiple parents

[Joseph Tremoulet via llvm-commits]

JosephTremoulet added inline comments.

================
Comment at: lib/CodeGen/WinEHPrepare.cpp:2978
@@ -2969,2 +2977,3 @@
   for (BasicBlock *FuncletEntry : EntryBlocks) {
     std::set<BasicBlock *> &ColorMapItem = BlockColors[FuncletEntry];
+    for (BasicBlock *Parent : ColorMapItem) {
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Since we expect multi-parent funclets to be extremely rare, it's probably worthwhile to record here whether you ever see a `ColorMapItem` with size > 1, then have `resolveFuncletAncestry(Function*)` check that and return immediately if there's no work for it to do.


Repository:
  rL LLVM

http://reviews.llvm.org/D13274