1 files changed, 130 insertions, 0 deletions
diff --git a/contrib/llvm/tools/llvm-ld/Optimize.cpp b/contrib/llvm/tools/llvm-ld/Optimize.cpp
new file mode 100644
index 0000000..7f3f900
--- /dev/null
+++ b/contrib/llvm/tools/llvm-ld/Optimize.cpp
@@ -0,0 +1,130 @@
+//===- Optimize.cpp - Optimize a complete program -------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements all optimization of the linked module for llvm-ld.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Module.h"
+#include "llvm/PassManager.h"
+#include "llvm/Analysis/Verifier.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/raw_ostream.h"
+#include "llvm/Support/DynamicLibrary.h"
+#include "llvm/Target/TargetData.h"
+#include "llvm/Target/TargetMachine.h"
+#include "llvm/Support/PassNameParser.h"
+#include "llvm/Support/PluginLoader.h"
+#include "llvm/Transforms/IPO.h"
+#include "llvm/Transforms/IPO/PassManagerBuilder.h"
+#include "llvm/Transforms/Scalar.h"
+using namespace llvm;
+
+// Pass Name Options as generated by the PassNameParser
+static cl::list<const PassInfo*, bool, PassNameParser>
+  OptimizationList(cl::desc("Optimizations available:"));
+
+//Don't verify at the end
+static cl::opt<bool> DontVerify("disable-verify", cl::ReallyHidden);
+
+static cl::opt<bool> DisableInline("disable-inlining",
+  cl::desc("Do not run the inliner pass"));
+
+static cl::opt<bool>
+DisableOptimizations("disable-opt",
+  cl::desc("Do not run any optimization passes"));
+
+static cl::opt<bool> DisableInternalize("disable-internalize",
+  cl::desc("Do not mark all symbols as internal"));
+
+static cl::opt<bool> VerifyEach("verify-each",
+ cl::desc("Verify intermediate results of all passes"));
+
+static cl::alias ExportDynamic("export-dynamic",
+  cl::aliasopt(DisableInternalize),
+  cl::desc("Alias for -disable-internalize"));
+
+static cl::opt<bool> Strip("strip-all", 
+  cl::desc("Strip all symbol info from executable"));
+
+static cl::alias A0("s", cl::desc("Alias for --strip-all"), 
+  cl::aliasopt(Strip));
+
+static cl::opt<bool> StripDebug("strip-debug",
+  cl::desc("Strip debugger symbol info from executable"));
+
+static cl::alias A1("S", cl::desc("Alias for --strip-debug"),
+  cl::aliasopt(StripDebug));
+
+// A utility function that adds a pass to the pass manager but will also add
+// a verifier pass after if we're supposed to verify.
+static inline void addPass(PassManager &PM, Pass *P) {
+  // Add the pass to the pass manager...
+  PM.add(P);
+
+  // If we are verifying all of the intermediate steps, add the verifier...
+  if (VerifyEach)
+    PM.add(createVerifierPass());
+}
+
+namespace llvm {
+/// Optimize - Perform link time optimizations. This will run the scalar
+/// optimizations, any loaded plugin-optimization modules, and then the
+/// inter-procedural optimizations if applicable.
+void Optimize(Module *M) {
+
+  // Instantiate the pass manager to organize the passes.
+  PassManager Passes;
+
+  // If we're verifying, start off with a verification pass.
+  if (VerifyEach)
+    Passes.add(createVerifierPass());
+
+  // Add an appropriate TargetData instance for this module...
+  addPass(Passes, new TargetData(M));
+
+  if (!DisableOptimizations)
+    PassManagerBuilder().populateLTOPassManager(Passes, !DisableInternalize,
+                                                !DisableInline);
+
+  // If the -s or -S command line options were specified, strip the symbols out
+  // of the resulting program to make it smaller.  -s and -S are GNU ld options
+  // that we are supporting; they alias -strip-all and -strip-debug.
+  if (Strip || StripDebug)
+    addPass(Passes, createStripSymbolsPass(StripDebug && !Strip));
+
+  // Create a new optimization pass for each one specified on the command line
+  std::auto_ptr<TargetMachine> target;
+  for (unsigned i = 0; i < OptimizationList.size(); ++i) {
+    const PassInfo *Opt = OptimizationList[i];
+    if (Opt->getNormalCtor())
+      addPass(Passes, Opt->getNormalCtor()());
+    else
+      errs() << "llvm-ld: cannot create pass: " << Opt->getPassName() 
+             << "\n";
+  }
+
+  // The user's passes may leave cruft around. Clean up after them them but
+  // only if we haven't got DisableOptimizations set
+  if (!DisableOptimizations) {
+    addPass(Passes, createInstructionCombiningPass());
+    addPass(Passes, createCFGSimplificationPass());
+    addPass(Passes, createAggressiveDCEPass());
+    addPass(Passes, createGlobalDCEPass());
+  }
+
+  // Make sure everything is still good.
+  if (!DontVerify)
+    Passes.add(createVerifierPass());
+
+  // Run our queue of passes all at once now, efficiently.
+  Passes.run(*M);
+}
+
+}