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9d4209fb82
empty ranges. 2. Reorg how MachineDebugInfo maintains changes to debug labels. 3. Have dwarf writer use debug label info to simplify scopes and source line coorespondence. 4. Revert the merging of compile units until I can get the bugs ironed out. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31507 91177308-0d34-0410-b5e6-96231b3b80d8
107 lines
4.3 KiB
C++
107 lines
4.3 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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/// 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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/// DebugLabelFoldingPass - This pass prunes out redundant debug labels. This
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/// allows a debug emitter to determine if the range of two labels is empty,
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/// by seeing if the labels map to the same reduced label.
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FunctionPass *createDebugLabelFoldingPass();
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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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//createModuloSchedulingPass - Creates the Swing Modulo Scheduling Pass
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FunctionPass *createModuloSchedulingSBPass(TargetMachine & targ);
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} // End llvm namespace
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#endif
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