+using namespace llvm;
+
+namespace {
+ cl::opt<std::string>
+ InputFilename(cl::Positional,cl::desc("<input llvm assembly>"),cl::init("-"));
+
+ cl::opt<std::string>
+ OutputFilename("o", cl::desc("Override output filename"),
+ cl::value_desc("filename"));
+
+ cl::opt<bool>
+ Verify("verify", cl::desc("Verify each pass result"));
+
+ cl::opt<bool>
+ DisableInline("disable-inlining", cl::desc("Do not run the inliner pass"));
+
+ cl::opt<bool>
+ DisableOptimizations("disable-opt",
+ cl::desc("Do not run any optimization passes"));
+}
+
+
+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 (Verify) PM.add(createVerifierPass());
+}
+
+
+void AddConfiguredTransformationPasses(PassManager &PM) {
+ PM.add(createVerifierPass()); // Verify that input is correct
+ addPass(PM, createLowerSetJmpPass()); // Lower llvm.setjmp/.longjmp
+ addPass(PM, createFunctionResolvingPass()); // Resolve (...) functions
+
+ if (DisableOptimizations) return;
+
+ addPass(PM, createRaiseAllocationsPass()); // call %malloc -> malloc inst
+ addPass(PM, createCFGSimplificationPass()); // Clean up disgusting code
+ addPass(PM, createPromoteMemoryToRegister()); // Kill useless allocas
+ addPass(PM, createGlobalConstifierPass()); // Mark read-only globals const
+ addPass(PM, createGlobalDCEPass()); // Remove unused globals
+ addPass(PM, createIPConstantPropagationPass());// IP Constant Propagation
+ addPass(PM, createDeadArgEliminationPass()); // Dead argument elimination
+ addPass(PM, createInstructionCombiningPass()); // Clean up after IPCP & DAE
+ addPass(PM, createCFGSimplificationPass()); // Clean up after IPCP & DAE
+
+ addPass(PM, createPruneEHPass()); // Remove dead EH info
+
+ if (!DisableInline)
+ addPass(PM, createFunctionInliningPass()); // Inline small functions
+ addPass(PM, createArgumentPromotionPass()); // Scalarize uninlined fn args
+
+ addPass(PM, createRaisePointerReferencesPass());// Recover type information
+ addPass(PM, createTailDuplicationPass()); // Simplify cfg by copying code
+ addPass(PM, createCFGSimplificationPass()); // Merge & remove BBs
+ addPass(PM, createScalarReplAggregatesPass()); // Break up aggregate allocas
+ addPass(PM, createInstructionCombiningPass()); // Combine silly seq's
+
+ addPass(PM, createReassociatePass()); // Reassociate expressions
+ addPass(PM, createInstructionCombiningPass()); // Combine silly seq's
+ addPass(PM, createTailCallEliminationPass()); // Eliminate tail calls
+ addPass(PM, createCFGSimplificationPass()); // Merge & remove BBs
+ addPass(PM, createLICMPass()); // Hoist loop invariants
+ addPass(PM, createLoadValueNumberingPass()); // GVN for load instructions
+ addPass(PM, createGCSEPass()); // Remove common subexprs
+ addPass(PM, createSCCPPass()); // Constant prop with SCCP
+
+ // Run instcombine after redundancy elimination to exploit opportunities
+ // opened up by them.
+ addPass(PM, createInstructionCombiningPass());
+ addPass(PM, createIndVarSimplifyPass()); // Canonicalize indvars
+ addPass(PM, createAggressiveDCEPass()); // SSA based 'Aggressive DCE'
+ addPass(PM, createCFGSimplificationPass()); // Merge & remove BBs
+ addPass(PM, createDeadTypeEliminationPass()); // Eliminate dead types
+ addPass(PM, createConstantMergePass()); // Merge dup global constants
+}
+