Convert xforms over to use new pass structure

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@1596 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 37 insertions, 0 deletions

diff --git a/include/llvm/Transforms/Utils/UnifyFunctionExitNodes.h b/include/llvm/Transforms/Utils/UnifyFunctionExitNodes.h
new file mode 100644
index 0000000000..09394685c1
--- /dev/null
+++ b/include/llvm/Transforms/Utils/UnifyFunctionExitNodes.h
@@ -0,0 +1,37 @@
+//===-- UnifyMethodExitNodes.h - Ensure methods have one return --*- C++ -*--=//
+//
+// This pass is used to ensure that methods have at most one return instruction
+// in them.  It also holds onto the return instruction of the last unified
+// method.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_XFORMS_UNIFY_METHOD_EXIT_NODES_H
+#define LLVM_XFORMS_UNIFY_METHOD_EXIT_NODES_H
+
+#include "llvm/Pass.h"
+#include "llvm/Analysis/SimplifyCFG.h"   // FIXME!!
+
+struct UnifyMethodExitNodes : public MethodPass {
+  BasicBlock *ExitNode;
+public:
+  static AnalysisID ID;            // Pass ID
+  UnifyMethodExitNodes(AnalysisID id) : ExitNode(0) { assert(ID == id); }
+
+  virtual bool runOnMethod(Method *M) {
+    ExitNode = cfg::UnifyAllExitNodes(M);
+
+    return true; // FIXME: This should return a correct code!!!
+  }
+
+  BasicBlock *getExitNode() const { return ExitNode; }
+
+  virtual void getAnalysisUsageInfo(Pass::AnalysisSet &Required,
+                                    Pass::AnalysisSet &Destroyed,
+                                    Pass::AnalysisSet &Provided) {
+    // FIXME: Should invalidate CFG
+    Provided.push_back(ID);  // Provide self!
+  }
+};
+
+#endif