49 lines
1.8 KiB
C
49 lines
1.8 KiB
C
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//===- SimplifyCFG.h - Simplify and canonicalize the CFG --------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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/// \file
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/// This file provides the interface for the pass responsible for both
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/// simplifying and canonicalizing the CFG.
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///
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_TRANSFORMS_SCALAR_SIMPLIFYCFG_H
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#define LLVM_TRANSFORMS_SCALAR_SIMPLIFYCFG_H
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#include "llvm/IR/Function.h"
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#include "llvm/IR/PassManager.h"
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#include "llvm/Transforms/Utils/SimplifyCFGOptions.h"
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namespace llvm {
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/// A pass to simplify and canonicalize the CFG of a function.
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///
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/// This pass iteratively simplifies the entire CFG of a function. It may change
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/// or remove control flow to put the CFG into a canonical form expected by
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/// other passes of the mid-level optimizer. Depending on the specified options,
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/// it may further optimize control-flow to create non-canonical forms.
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class SimplifyCFGPass : public PassInfoMixin<SimplifyCFGPass> {
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SimplifyCFGOptions Options;
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public:
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/// The default constructor sets the pass options to create canonical IR,
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/// rather than optimal IR. That is, by default we bypass transformations that
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/// are likely to improve performance but make analysis for other passes more
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/// difficult.
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SimplifyCFGPass();
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/// Construct a pass with optional optimizations.
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SimplifyCFGPass(const SimplifyCFGOptions &PassOptions);
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/// Run the pass over the function.
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PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
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};
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}
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#endif
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