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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110410 91177308-0d34-0410-b5e6-96231b3b80d8
204 lines
8.0 KiB
C++
204 lines
8.0 KiB
C++
//===-- Passes.h - Target independent code generation passes ----*- 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 defines interfaces to access the target independent code generation
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// passes provided by the LLVM backend.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CODEGEN_PASSES_H
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#define LLVM_CODEGEN_PASSES_H
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#include "llvm/Target/TargetMachine.h"
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#include <string>
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namespace llvm {
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class FunctionPass;
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class MachineFunctionPass;
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class PassInfo;
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class TargetLowering;
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class RegisterCoalescer;
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class raw_ostream;
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/// createUnreachableBlockEliminationPass - The LLVM code generator does not
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/// work well with unreachable basic blocks (what live ranges make sense for a
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/// block that cannot be reached?). As such, a code generator should either
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/// not instruction select unreachable blocks, or it can run this pass as it's
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/// last LLVM modifying pass to clean up blocks that are not reachable from
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/// the entry block.
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FunctionPass *createUnreachableBlockEliminationPass();
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/// MachineFunctionPrinter pass - This pass prints out the machine function to
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/// the given stream, as a debugging tool.
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MachineFunctionPass *
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createMachineFunctionPrinterPass(raw_ostream &OS,
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const std::string &Banner ="");
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/// MachineLoopInfo pass - This pass is a loop analysis pass.
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///
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extern const PassInfo *const MachineLoopInfoID;
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/// MachineDominators pass - This pass is a machine dominators analysis pass.
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///
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extern const PassInfo *const MachineDominatorsID;
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/// PHIElimination pass - This pass eliminates machine instruction PHI nodes
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/// by inserting copy instructions. This destroys SSA information, but is the
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/// desired input for some register allocators. This pass is "required" by
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/// these register allocator like this: AU.addRequiredID(PHIEliminationID);
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///
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extern const PassInfo *const PHIEliminationID;
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/// StrongPHIElimination pass - This pass eliminates machine instruction PHI
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/// nodes by inserting copy instructions. This destroys SSA information, but
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/// is the desired input for some register allocators. This pass is
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/// "required" by these register allocator like this:
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/// AU.addRequiredID(PHIEliminationID);
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/// This pass is still in development
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extern const PassInfo *const StrongPHIEliminationID;
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extern const PassInfo *const PreAllocSplittingID;
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/// SimpleRegisterCoalescing pass. Aggressively coalesces every register
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/// copy it can.
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///
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extern const PassInfo *const SimpleRegisterCoalescingID;
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/// TwoAddressInstruction pass - This pass reduces two-address instructions to
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/// use two operands. This destroys SSA information but it is desired by
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/// register allocators.
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extern const PassInfo *const TwoAddressInstructionPassID;
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/// UnreachableMachineBlockElimination pass - This pass removes unreachable
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/// machine basic blocks.
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extern const PassInfo *const UnreachableMachineBlockElimID;
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/// DeadMachineInstructionElim pass - This pass removes dead machine
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/// instructions.
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///
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FunctionPass *createDeadMachineInstructionElimPass();
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/// Creates a register allocator as the user specified on the command line, or
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/// picks one that matches OptLevel.
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///
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FunctionPass *createRegisterAllocator(CodeGenOpt::Level OptLevel);
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/// FastRegisterAllocation Pass - This pass register allocates as fast as
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/// possible. It is best suited for debug code where live ranges are short.
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///
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FunctionPass *createFastRegisterAllocator();
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/// LinearScanRegisterAllocation Pass - This pass implements the linear scan
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/// register allocation algorithm, a global register allocator.
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///
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FunctionPass *createLinearScanRegisterAllocator();
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/// PBQPRegisterAllocation Pass - This pass implements the Partitioned Boolean
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/// Quadratic Prograaming (PBQP) based register allocator.
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///
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FunctionPass *createPBQPRegisterAllocator();
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/// SimpleRegisterCoalescing Pass - Coalesce all copies possible. Can run
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/// independently of the register allocator.
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///
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RegisterCoalescer *createSimpleRegisterCoalescer();
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/// PrologEpilogCodeInserter Pass - This pass inserts prolog and epilog code,
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/// and eliminates abstract frame references.
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///
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FunctionPass *createPrologEpilogCodeInserter();
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/// LowerSubregs Pass - This pass lowers subregs to register-register copies
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/// which yields suboptimal, but correct code if the register allocator
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/// cannot coalesce all subreg operations during allocation.
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///
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FunctionPass *createLowerSubregsPass();
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/// createPostRAScheduler - This pass performs post register allocation
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/// scheduling.
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FunctionPass *createPostRAScheduler(CodeGenOpt::Level OptLevel);
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/// BranchFolding Pass - This pass performs machine code CFG based
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/// optimizations to delete branches to branches, eliminate branches to
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/// successor blocks (creating fall throughs), and eliminating branches over
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/// branches.
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FunctionPass *createBranchFoldingPass(bool DefaultEnableTailMerge);
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/// TailDuplicate Pass - Duplicate blocks with unconditional branches
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/// into tails of their predecessors.
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FunctionPass *createTailDuplicatePass(bool PreRegAlloc = false);
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/// IfConverter Pass - This pass performs machine code if conversion.
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FunctionPass *createIfConverterPass();
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/// Code Placement Pass - This pass optimize code placement and aligns loop
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/// headers to target specific alignment boundary.
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FunctionPass *createCodePlacementOptPass();
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/// IntrinsicLowering Pass - Performs target-independent LLVM IR
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/// transformations for highly portable strategies.
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FunctionPass *createGCLoweringPass();
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/// MachineCodeAnalysis Pass - Target-independent pass to mark safe points in
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/// machine code. Must be added very late during code generation, just prior
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/// to output, and importantly after all CFG transformations (such as branch
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/// folding).
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FunctionPass *createGCMachineCodeAnalysisPass();
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/// Deleter Pass - Releases GC metadata.
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///
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FunctionPass *createGCInfoDeleter();
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/// Creates a pass to print GC metadata.
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///
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FunctionPass *createGCInfoPrinter(raw_ostream &OS);
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/// createMachineCSEPass - This pass performs global CSE on machine
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/// instructions.
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FunctionPass *createMachineCSEPass();
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/// createMachineLICMPass - This pass performs LICM on machine instructions.
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///
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FunctionPass *createMachineLICMPass(bool PreRegAlloc = true);
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/// createMachineSinkingPass - This pass performs sinking on machine
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/// instructions.
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FunctionPass *createMachineSinkingPass();
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/// createOptimizeExtsPass - This pass performs sign / zero extension
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/// optimization by increasing uses of extended values.
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FunctionPass *createOptimizeExtsPass();
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/// createOptimizePHIsPass - This pass optimizes machine instruction PHIs
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/// to take advantage of opportunities created during DAG legalization.
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FunctionPass *createOptimizePHIsPass();
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/// createStackSlotColoringPass - This pass performs stack slot coloring.
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FunctionPass *createStackSlotColoringPass(bool);
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/// createStackProtectorPass - This pass adds stack protectors to functions.
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FunctionPass *createStackProtectorPass(const TargetLowering *tli);
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/// createMachineVerifierPass - This pass verifies cenerated machine code
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/// instructions for correctness.
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FunctionPass *createMachineVerifierPass();
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/// createDwarfEHPass - This pass mulches exception handling code into a form
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/// adapted to code generation. Required if using dwarf exception handling.
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FunctionPass *createDwarfEHPass(const TargetMachine *tm, bool fast);
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/// createSjLjEHPass - This pass adapts exception handling code to use
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/// the GCC-style builtin setjmp/longjmp (sjlj) to handling EH control flow.
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FunctionPass *createSjLjEHPass(const TargetLowering *tli);
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} // End llvm namespace
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#endif
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