Import LLVM, at r72732.

1 files changed, 63 insertions, 0 deletions

diff --git a/lib/Transforms/Utils/InstructionNamer.cpp b/lib/Transforms/Utils/InstructionNamer.cpp
new file mode 100644
index 0000000..4f8a160
--- /dev/null
+++ b/lib/Transforms/Utils/InstructionNamer.cpp
@@ -0,0 +1,63 @@
+//===- InstructionNamer.cpp - Give anonymous instructions names -----------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This is a little utility pass that gives instructions names, this is mostly
+// useful when diffing the effect of an optimization because deleting an
+// unnamed instruction can change all other instruction numbering, making the
+// diff very noisy.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Transforms/Scalar.h"
+#include "llvm/Function.h"
+#include "llvm/Pass.h"
+#include "llvm/Type.h"
+using namespace llvm;
+
+namespace {
+  struct InstNamer : public FunctionPass {
+    static char ID; // Pass identification, replacement for typeid
+    InstNamer() : FunctionPass(&ID) {}
+    
+    void getAnalysisUsage(AnalysisUsage &Info) const {
+      Info.setPreservesAll();
+    }
+
+    bool runOnFunction(Function &F) {
+      for (Function::arg_iterator AI = F.arg_begin(), AE = F.arg_end();
+           AI != AE; ++AI)
+        if (!AI->hasName() && AI->getType() != Type::VoidTy)
+          AI->setName("tmp");
+
+      for (Function::iterator BB = F.begin(), E = F.end(); BB != E; ++BB) {
+        if (!BB->hasName())
+          BB->setName("BB");
+        
+        for (BasicBlock::iterator I = BB->begin(), E = BB->end(); I != E; ++I)
+          if (!I->hasName() && I->getType() != Type::VoidTy)
+            I->setName("tmp");
+      }
+      return true;
+    }
+  };
+  
+  char InstNamer::ID = 0;
+  static RegisterPass<InstNamer> X("instnamer",
+                                   "Assign names to anonymous instructions");
+}
+
+
+const PassInfo *const llvm::InstructionNamerID = &X;
+//===----------------------------------------------------------------------===//
+//
+// InstructionNamer - Give any unnamed non-void instructions "tmp" names.
+//
+FunctionPass *llvm::createInstructionNamerPass() {
+  return new InstNamer();
+}