forked from OSchip/llvm-project
57 lines
2.1 KiB
C++
57 lines
2.1 KiB
C++
//===- Passes.h - Parsing, selection, and running of 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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/// \file
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///
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/// Interfaces for producing common pass manager configurations and parsing
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/// textual pass specifications.
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///
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_TOOLS_OPT_PASSES_H
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#define LLVM_TOOLS_OPT_PASSES_H
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#include "llvm/ADT/StringRef.h"
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namespace llvm {
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class ModulePassManager;
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/// \brief Parse a textual pass pipeline description into a \c ModulePassManager.
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///
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/// The format of the textual pass pipeline description looks something like:
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///
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/// module(function(instcombine,sroa),dce,cgscc(inliner,function(...)),...)
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///
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/// Pass managers have ()s describing the nest structure of passes. All passes
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/// are comma separated. As a special shortcut, if the very first pass is not
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/// a module pass (as a module pass manager is), this will automatically form
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/// the shortest stack of pass managers that allow inserting that first pass.
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/// So, assuming function passes 'fpassN', CGSCC passes 'cgpassN', and loop passes
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/// 'lpassN', all of these are valid:
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///
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/// fpass1,fpass2,fpass3
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/// cgpass1,cgpass2,cgpass3
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/// lpass1,lpass2,lpass3
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///
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/// And they are equivalent to the following (resp.):
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///
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/// module(function(fpass1,fpass2,fpass3))
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/// module(cgscc(cgpass1,cgpass2,cgpass3))
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/// module(function(loop(lpass1,lpass2,lpass3)))
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///
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/// This shortcut is especially useful for debugging and testing small pass
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/// combinations. Note that these shortcuts don't introduce any other magic. If
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/// the sequence of passes aren't all the exact same kind of pass, it will be
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/// an error. You cannot mix different levels implicitly, you must explicitly
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/// form a pass manager in which to nest passes.
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bool parsePassPipeline(ModulePassManager &MPM, StringRef PipelineText);
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}
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#endif
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