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Extract optimization pass selection code from llvm-gcc into a separate routine.
This can be used by other stand alone tools, such as 'opt'. llvm-svn: 56229
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include/llvm/PassManagerUtils.h
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include/llvm/PassManagerUtils.h
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//===-- llvm/Support/PassManagerUtils.h -------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file provides interface to pass manager utilities.
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//
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//===----------------------------------------------------------------------===//
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namespace llvm {
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class FunctionPassManager;
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class PassManager;
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/// AddOptimizationPasses - This routine adds optimization passes
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/// based on selected optimization level, OptLevel. This routine is
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/// used by llvm-gcc and other tools.
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///
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/// OptLevel - Optimization Level
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/// EnableIPO - Enables IPO passes. llvm-gcc enables this when
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/// flag_unit_at_a_time is set.
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/// InlinerSelection - 1 : Add function inliner.
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/// - 2 : Add AlwaysInliner.
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/// OptLibCalls - Simplify lib calls, if set.
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/// PruneEH - Add PruneEHPass, if set.
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/// UnrollLoop - Unroll loops, if set.
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void AddOptimizationPasses(FunctionPassManager &FPM, PassManager &MPM,
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unsigned OptLevel, bool EnableIPO,
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unsigned InlinerSelection, bool OptLibCalls,
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bool PruneEH, bool UnrollLoop);
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}
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108
utils/PassManagerUtils.cpp
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utils/PassManagerUtils.cpp
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//===-- PassManagerUtils.cpp - --------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements pass manager utiliy routines.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/PassManagerUtils.h"
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#include "llvm/PassManagers.h"
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#include "llvm/Transforms/Scalar.h"
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#include "llvm/Transforms/IPO.h"
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#include "llvm/Analysis/LoopPass.h"
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/// AddOptimizationPasses - This routine adds optimization passes
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/// based on selected optimization level, OptLevel. This routine is
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/// used by llvm-gcc and other tools.
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///
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/// OptLevel - Optimization Level
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/// EnableIPO - Enables IPO passes. llvm-gcc enables this when
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/// flag_unit_at_a_time is set.
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/// InlinerSelection - 1 : Add function inliner.
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/// - 2 : Add AlwaysInliner.
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/// OptLibCalls - Simplify lib calls, if set.
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/// PruneEH - Add PruneEHPass, if set.
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/// UnrollLoop - Unroll loops, if set.
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void llvm::AddOptimizationPasses(FunctionPassManager &FPM, PassManager &MPM,
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unsigned OptLevel, bool EnableIPO,
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unsigned InlinerSelection, bool OptLibCalls,
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bool PruneEH, bool UnrollLoop) {
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if (OptLevel == 0)
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return;
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FPM.add(createCFGSimplificationPass());
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if (OptLevel == 1)
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FPM.add(createPromoteMemoryToRegisterPass());
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else
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FPM.add(createScalarReplAggregatesPass());
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FPM.add(createInstructionCombiningPass());
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if (EnableIPO)
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MPM.add(createRaiseAllocationsPass()); // call %malloc -> malloc inst
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MPM.add(createCFGSimplificationPass()); // Clean up disgusting code
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MPM.add(createPromoteMemoryToRegisterPass()); // Kill useless allocas
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if (EnableIPO) {
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MPM.add(createGlobalOptimizerPass()); // OptLevel out global vars
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MPM.add(createGlobalDCEPass()); // Remove unused fns and globs
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MPM.add(createIPConstantPropagationPass()); // IP Constant Propagation
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MPM.add(createDeadArgEliminationPass()); // Dead argument elimination
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}
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MPM.add(createInstructionCombiningPass()); // Clean up after IPCP & DAE
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MPM.add(createCFGSimplificationPass()); // Clean up after IPCP & DAE
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if (EnableIPO && PruneEH)
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MPM.add(createPruneEHPass()); // Remove dead EH info
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if (InlinerSelection == 1) // respect -fno-inline-functions
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MPM.add(createFunctionInliningPass()); // Inline small functions
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else if (InlinerSelection == 2)
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MPM.add(createAlwaysInlinerPass()); // Inline always_inline functions
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if (OptLevel > 2)
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MPM.add(createArgumentPromotionPass()); // Scalarize uninlined fn args
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if (OptLibCalls)
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MPM.add(createSimplifyLibCallsPass()); // Library Call Optimizations
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MPM.add(createInstructionCombiningPass()); // Cleanup for scalarrepl.
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MPM.add(createJumpThreadingPass()); // Thread jumps.
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MPM.add(createCFGSimplificationPass()); // Merge & remove BBs
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MPM.add(createScalarReplAggregatesPass()); // Break up aggregate allocas
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MPM.add(createInstructionCombiningPass()); // Combine silly seq's
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MPM.add(createCondPropagationPass()); // Propagate conditionals
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MPM.add(createTailCallEliminationPass()); // Eliminate tail calls
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MPM.add(createCFGSimplificationPass()); // Merge & remove BBs
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MPM.add(createReassociatePass()); // Reassociate expressions
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MPM.add(createLoopRotatePass()); // Rotate Loop
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MPM.add(createLICMPass()); // Hoist loop invariants
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MPM.add(createLoopUnswitchPass());
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MPM.add(createLoopIndexSplitPass()); // Split loop index
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MPM.add(createInstructionCombiningPass());
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MPM.add(createIndVarSimplifyPass()); // Canonicalize indvars
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MPM.add(createLoopDeletionPass()); // Delete dead loops
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if (UnrollLoop)
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MPM.add(createLoopUnrollPass()); // Unroll small loops
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MPM.add(createInstructionCombiningPass()); // Clean up after the unroller
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MPM.add(createGVNPass()); // Remove redundancies
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MPM.add(createMemCpyOptPass()); // Remove memcpy / form memset
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MPM.add(createSCCPPass()); // Constant prop with SCCP
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// Run instcombine after redundancy elimination to exploit opportunities
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// opened up by them.
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MPM.add(createInstructionCombiningPass());
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MPM.add(createCondPropagationPass()); // Propagate conditionals
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MPM.add(createDeadStoreEliminationPass()); // Delete dead stores
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MPM.add(createAggressiveDCEPass()); // Delete dead instructions
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MPM.add(createCFGSimplificationPass()); // Merge & remove BBs
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if (EnableIPO) {
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MPM.add(createStripDeadPrototypesPass()); // Get rid of dead prototypes
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MPM.add(createDeadTypeEliminationPass()); // Eliminate dead types
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}
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if (OptLevel > 1 && EnableIPO)
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MPM.add(createConstantMergePass()); // Merge dup global constants
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return;
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}
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