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39 lines
1.3 KiB
C
39 lines
1.3 KiB
C
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//===-- Passes.h - Target independant code generation passes ----*- C++ -*-===//
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//
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// This file defines interfaces to access the target independant 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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class Pass;
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class PassInfo;
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// PHIElimination pass - This pass eliminates machine instruction PHI nodes by
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// 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 these
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// register allocator like this: AU.addRequiredID(PHIEliminationID);
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//
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extern const PassInfo *PHIEliminationID;
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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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Pass *createSimpleRegisterAllocator();
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/// LocalRegisterAllocation Pass - This pass register allocates the input code a
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/// 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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Pass *createLocalRegisterAllocator();
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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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Pass *createPrologEpilogCodeInserter();
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#endif
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