Check in LLVM r95781.

3 files changed, 84 insertions, 0 deletions

diff --git a/lib/Transforms/Hello/CMakeLists.txt b/lib/Transforms/Hello/CMakeLists.txt
new file mode 100644
index 0000000..917b745
--- /dev/null
+++ b/lib/Transforms/Hello/CMakeLists.txt
@@ -0,0 +1,3 @@
+add_llvm_loadable_module( LLVMHello
+  Hello.cpp
+  )
diff --git a/lib/Transforms/Hello/Hello.cpp b/lib/Transforms/Hello/Hello.cpp
new file mode 100644
index 0000000..eac4e17
--- /dev/null
+++ b/lib/Transforms/Hello/Hello.cpp
@@ -0,0 +1,65 @@
+//===- 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/raw_ostream.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++;
+      errs() << "Hello: ";
+      errs().write_escaped(F.getName()) << '\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++;
+      errs() << "Hello: ";
+      errs().write_escaped(F.getName()) << '\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)");
diff --git a/lib/Transforms/Hello/Makefile b/lib/Transforms/Hello/Makefile
new file mode 100644
index 0000000..c5e75d4
--- /dev/null
+++ b/lib/Transforms/Hello/Makefile
@@ -0,0 +1,16 @@
+##===- lib/Transforms/Hello/Makefile -----------------------*- Makefile -*-===##
+#
+#                     The LLVM Compiler Infrastructure
+#
+# This file is distributed under the University of Illinois Open Source
+# License. See LICENSE.TXT for details.
+#
+##===----------------------------------------------------------------------===##
+
+LEVEL = ../../..
+LIBRARYNAME = LLVMHello
+LOADABLE_MODULE = 1
+USEDLIBS =
+
+include $(LEVEL)/Makefile.common
+