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104 lines
4.1 KiB
C++
104 lines
4.1 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 was developed by the LLVM research group and is distributed under
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// the University of Illinois Open Source 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 <iosfwd>
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#include <string>
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namespace llvm {
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class FunctionPass;
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class PassInfo;
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class TargetMachine;
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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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/// standard error, as a debugging tool.
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FunctionPass *createMachineFunctionPrinterPass(std::ostream *OS,
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const std::string &Banner ="");
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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 *PHIEliminationID;
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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 *TwoAddressInstructionPassID;
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/// Creates a register allocator as the user specified on the command line.
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///
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FunctionPass *createRegisterAllocator();
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/// SimpleRegisterAllocation Pass - This pass converts the input machine code
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/// from SSA form to use explicit registers by spilling every register. Wow,
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/// great policy huh?
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///
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FunctionPass *createSimpleRegisterAllocator();
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/// LocalRegisterAllocation Pass - This pass register allocates the input code
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/// a basic block at a time, yielding code better than the simple register
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/// allocator, but not as good as a global allocator.
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///
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FunctionPass *createLocalRegisterAllocator();
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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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/// IterativeScanRegisterAllocation Pass - This pass implements the iterative
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/// scan register allocation algorithm, a global register allocator.
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///
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FunctionPass *createIterativeScanRegisterAllocator();
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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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/// 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();
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/// MachineCodeDeletion Pass - This pass deletes all of the machine code for
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/// the current function, which should happen after the function has been
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/// emitted to a .s file or to memory.
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FunctionPass *createMachineCodeDeleter();
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/// getRegisterAllocator - This creates an instance of the register allocator
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/// for the Sparc.
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FunctionPass *getRegisterAllocator(TargetMachine &T);
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//createModuloSchedulingPass - Creates the Swing Modulo Scheduling Pass
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FunctionPass *createModuloSchedulingPass(TargetMachine & targ);
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} // End llvm namespace
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#endif
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