Fix bug in getting PHI sources

Author: bcardosolopes

mlir/lib/Target/LLVMIR/ModuleTranslation.cpp

@@ -807,8 +807,10 @@ static Value getPHISourceValue(Block *current, Block *pred,
 
   if (auto indBrOp = dyn_cast<LLVM::IndirectBrOp>(terminator)) {
     // For indirect branches we take operands for each successor.
-    for (const auto &i : llvm::enumerate(indBrOp->getSuccessors()))
-      return indBrOp.getSuccessorOperands(i.index())[index];
+    for (const auto &i : llvm::enumerate(indBrOp->getSuccessors())) {
+      if (indBrOp->getSuccessor(i.index()) == current)
+        return indBrOp.getSuccessorOperands(i.index())[index];
+    }
   }
 
   if (auto invokeOp = dyn_cast<LLVM::InvokeOp>(terminator)) {