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//===-- llvm/Support/StandardPasses.h - Standard pass lists -----*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines utility functions for creating a "standard" set of
// optimization passes, so that compilers and tools which use optimization
// passes use the same set of standard passes.
//
// These are implemented as inline functions so that we do not have to worry
// about link issues.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_SUPPORT_STANDARDPASSES_H
#define LLVM_SUPPORT_STANDARDPASSES_H
#include "llvm/PassManager.h"
#include "llvm/Transforms/Scalar.h"
#include "llvm/Transforms/IPO.h"
namespace llvm {
/// createStandardFunctionPasses - Add the standard list of function passes to
/// the provided pass manager.
///
/// \arg OptimizationLevel - The optimization level, corresponding to -O0,
/// -O1, etc.
static inline void createStandardFunctionPasses(FunctionPassManager *PM,
unsigned OptimizationLevel);
/// createStandardModulePasses - Add the standard list of module passes to the
/// provided pass manager.
///
/// \arg OptimizationLevel - The optimization level, corresponding to -O0,
/// -O1, etc.
/// \arg OptimizeSize - Whether the transformations should optimize for size.
/// \arg UnitAtATime - Allow passes which may make global module changes.
/// \arg UnrollLoops - Allow loop unrolling.
/// \arg SimplifyLibCalls - Allow library calls to be simplified.
/// \arg HaveExceptions - Whether the module may have code using exceptions.
/// \arg InliningPass - The inlining pass to use, if any, or null. This will
/// always be added, even at -O0.a
static inline void createStandardModulePasses(PassManager *PM,
unsigned OptimizationLevel,
bool OptimizeSize,
bool UnitAtATime,
bool UnrollLoops,
bool SimplifyLibCalls,
bool HaveExceptions,
Pass *InliningPass);
// Implementations
static inline void createStandardFunctionPasses(FunctionPassManager *PM,
unsigned OptimizationLevel) {
if (OptimizationLevel > 0) {
PM->add(createCFGSimplificationPass());
if (OptimizationLevel == 1)
PM->add(createPromoteMemoryToRegisterPass());
else
PM->add(createScalarReplAggregatesPass());
PM->add(createInstructionCombiningPass());
}
}
static inline void createStandardModulePasses(PassManager *PM,
unsigned OptimizationLevel,
bool OptimizeSize,
bool UnitAtATime,
bool UnrollLoops,
bool SimplifyLibCalls,
bool HaveExceptions,
Pass *InliningPass) {
if (OptimizationLevel == 0) {
if (InliningPass)
PM->add(InliningPass);
} else {
if (UnitAtATime)
PM->add(createRaiseAllocationsPass()); // call %malloc -> malloc inst
PM->add(createCFGSimplificationPass()); // Clean up disgusting code
// Kill useless allocas
PM->add(createPromoteMemoryToRegisterPass());
if (UnitAtATime) {
PM->add(createGlobalOptimizerPass()); // Optimize out global vars
PM->add(createGlobalDCEPass()); // Remove unused fns and globs
// IP Constant Propagation
PM->add(createIPConstantPropagationPass());
PM->add(createDeadArgEliminationPass()); // Dead argument elimination
}
PM->add(createInstructionCombiningPass()); // Clean up after IPCP & DAE
PM->add(createCFGSimplificationPass()); // Clean up after IPCP & DAE
if (UnitAtATime) {
if (HaveExceptions)
PM->add(createPruneEHPass()); // Remove dead EH info
PM->add(createFunctionAttrsPass()); // Set readonly/readnone attrs
}
if (InliningPass)
PM->add(InliningPass);
if (OptimizationLevel > 2)
PM->add(createArgumentPromotionPass()); // Scalarize uninlined fn args
if (SimplifyLibCalls)
PM->add(createSimplifyLibCallsPass()); // Library Call Optimizations
PM->add(createInstructionCombiningPass()); // Cleanup for scalarrepl.
PM->add(createJumpThreadingPass()); // Thread jumps.
PM->add(createCFGSimplificationPass()); // Merge & remove BBs
PM->add(createScalarReplAggregatesPass()); // Break up aggregate allocas
PM->add(createInstructionCombiningPass()); // Combine silly seq's
PM->add(createCondPropagationPass()); // Propagate conditionals
PM->add(createTailCallEliminationPass()); // Eliminate tail calls
PM->add(createCFGSimplificationPass()); // Merge & remove BBs
PM->add(createReassociatePass()); // Reassociate expressions
PM->add(createLoopRotatePass()); // Rotate Loop
PM->add(createLICMPass()); // Hoist loop invariants
PM->add(createLoopUnswitchPass(OptimizeSize));
PM->add(createLoopIndexSplitPass()); // Split loop index
PM->add(createInstructionCombiningPass());
PM->add(createIndVarSimplifyPass()); // Canonicalize indvars
PM->add(createLoopDeletionPass()); // Delete dead loops
if (UnrollLoops)
PM->add(createLoopUnrollPass()); // Unroll small loops
PM->add(createInstructionCombiningPass()); // Clean up after the unroller
PM->add(createGVNPass()); // Remove redundancies
PM->add(createMemCpyOptPass()); // Remove memcpy / form memset
PM->add(createSCCPPass()); // Constant prop with SCCP
// Run instcombine after redundancy elimination to exploit opportunities
// opened up by them.
PM->add(createInstructionCombiningPass());
PM->add(createCondPropagationPass()); // Propagate conditionals
PM->add(createDeadStoreEliminationPass()); // Delete dead stores
PM->add(createAggressiveDCEPass()); // Delete dead instructions
PM->add(createCFGSimplificationPass()); // Merge & remove BBs
if (UnitAtATime) {
PM->add(createStripDeadPrototypesPass()); // Get rid of dead prototypes
PM->add(createDeadTypeEliminationPass()); // Eliminate dead types
}
if (OptimizationLevel > 1 && UnitAtATime)
PM->add(createConstantMergePass()); // Merge dup global constants
}
}
}
#endif
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