Import LLVM, at r72732.

1 files changed, 67 insertions, 0 deletions

diff --git a/lib/Transforms/Hello/Hello.cpp b/lib/Transforms/Hello/Hello.cpp
new file mode 100644
index 0000000..d07f613
--- /dev/null
+++ b/lib/Transforms/Hello/Hello.cpp
@@ -0,0 +1,67 @@
+//===- Hello.cpp - Example code from "Writing an LLVM Pass" ---------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements two versions of the LLVM "Hello World" pass described
+// in docs/WritingAnLLVMPass.html
+//
+//===----------------------------------------------------------------------===//
+
+#define DEBUG_TYPE "hello"
+#include "llvm/Pass.h"
+#include "llvm/Function.h"
+#include "llvm/ADT/StringExtras.h"
+#include "llvm/Support/Streams.h"
+#include "llvm/ADT/Statistic.h"
+using namespace llvm;
+
+STATISTIC(HelloCounter, "Counts number of functions greeted");
+
+namespace {
+  // Hello - The first implementation, without getAnalysisUsage.
+  struct Hello : public FunctionPass {
+    static char ID; // Pass identification, replacement for typeid
+    Hello() : FunctionPass(&ID) {}
+
+    virtual bool runOnFunction(Function &F) {
+      HelloCounter++;
+      std::string fname = F.getName();
+      EscapeString(fname);
+      cerr << "Hello: " << fname << "\n";
+      return false;
+    }
+  };
+}
+
+char Hello::ID = 0;
+static RegisterPass<Hello> X("hello", "Hello World Pass");
+
+namespace {
+  // Hello2 - The second implementation with getAnalysisUsage implemented.
+  struct Hello2 : public FunctionPass {
+    static char ID; // Pass identification, replacement for typeid
+    Hello2() : FunctionPass(&ID) {}
+
+    virtual bool runOnFunction(Function &F) {
+      HelloCounter++;
+      std::string fname = F.getName();
+      EscapeString(fname);
+      cerr << "Hello: " << fname << "\n";
+      return false;
+    }
+
+    // We don't modify the program, so we preserve all analyses
+    virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+      AU.setPreservesAll();
+    };
+  };
+}
+
+char Hello2::ID = 0;
+static RegisterPass<Hello2>
+Y("hello2", "Hello World Pass (with getAnalysisUsage implemented)");