Transforms/Scalar/RewriteStatepointsForGC.cpp

2033     Value *RootOfChain =
2042     // Handle the scenario where the RootOfChain is not equal to the
2044     if (RootOfChain != Info.PointerToBase[LiveValue]) {
2045       PHINode *OrigRootPhi = dyn_cast<PHINode>(RootOfChain);
2055       // and RootOfChain (the original phi node itself) are the same, so that we
2093         Instruction *InsertBefore, Value *RootOfChain, Value *AlternateLiveBase) {
2118             // Assert that the cloned instruction does not use the RootOfChain
2120             assert(OpValue != RootOfChain && OpValue != AlternateLiveBase);
2125           // RootOfChain/OrigRootPhi, with the corresponding PHI present in the
2127           // that the *only* use of the RootOfChain in the ChainToBase list is
2129           if (RootOfChain != AlternateLiveBase)
2130             ClonedValue->replaceUsesOfWith(RootOfChain, AlternateLiveBase);
2146           InsertBefore, RootOfChain, Info.PointerToBase[LiveValue]);
2157           NormalInsertBefore, RootOfChain, Info.PointerToBase[LiveValue]);
2159           UnwindInsertBefore, RootOfChain, Info.PointerToBase[LiveValue]);