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a670c684a6
block (common in a switch), make sure to remove extra edges in successor blocks. This fixes CodeExtractor/2004-08-12-BlockExtractPHI.ll and should be pulled into LLVM 1.3 (though the regression test need not be, as that would require pulling in the LoopExtract.cpp changes). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15717 91177308-0d34-0410-b5e6-96231b3b80d8