--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gen/optimizer.cpp	Wed Nov 28 04:52:35 2007 +0100
@@ -0,0 +1,81 @@
+#include "llvm/PassManager.h"
+#include "llvm/LinkAllPasses.h"
+#include "llvm/Analysis/LoopPass.h"
+#include "llvm/Target/TargetData.h"
+
+using namespace llvm;
+
+//////////////////////////////////////////////////////////////////////////////////////////
+
+// this function runs some or all of the std-compile-opts passes depending on the
+// optimization level given.
+
+void llvmdc_optimize_module(Module* m, char lvl, bool doinline)
+{
+    assert(lvl >= 0 && lvl <= 5);
+    if (lvl == 0)
+        return;
+
+    PassManager pm;
+    pm.add(new TargetData(m));
+
+    if (lvl >= 1)
+    {
+        pm.add(createRaiseAllocationsPass());
+        pm.add(createCFGSimplificationPass());
+        pm.add(createPromoteMemoryToRegisterPass());
+    }
+
+    if (lvl >= 2)
+    {
+        pm.add(createGlobalOptimizerPass());
+        pm.add(createGlobalDCEPass());
+        pm.add(createIPConstantPropagationPass());
+        pm.add(createDeadArgEliminationPass());
+        pm.add(createInstructionCombiningPass());
+        pm.add(createCFGSimplificationPass());
+        pm.add(createPruneEHPass());
+    }
+
+    if (doinline) {
+        pm.add(createFunctionInliningPass());
+    }
+
+    if (lvl >= 3)
+    {
+        pm.add(createArgumentPromotionPass());
+        pm.add(createTailDuplicationPass());
+        pm.add(createInstructionCombiningPass());
+        pm.add(createCFGSimplificationPass());
+        pm.add(createScalarReplAggregatesPass());
+        pm.add(createInstructionCombiningPass());
+        pm.add(createCondPropagationPass());
+
+        pm.add(createTailCallEliminationPass());
+        pm.add(createCFGSimplificationPass());
+        pm.add(createReassociatePass());
+        pm.add(createLoopRotatePass());
+        pm.add(createLICMPass());
+        pm.add(createLoopUnswitchPass());
+        pm.add(createInstructionCombiningPass());
+        pm.add(createIndVarSimplifyPass());
+        pm.add(createLoopUnrollPass());
+        pm.add(createInstructionCombiningPass());
+        pm.add(createGVNPass());
+        pm.add(createSCCPPass());
+
+        pm.add(createInstructionCombiningPass());
+        pm.add(createCondPropagationPass());
+
+        pm.add(createDeadStoreEliminationPass());
+        pm.add(createAggressiveDCEPass());
+        pm.add(createCFGSimplificationPass());
+        pm.add(createSimplifyLibCallsPass());
+        pm.add(createDeadTypeEliminationPass());
+        pm.add(createConstantMergePass());
+    }
+
+    // level 4 and 5 are linktime optimizations
+
+    pm.run(*m);
+}