41 lines
1.7 KiB
C++
41 lines
1.7 KiB
C++
//===-- ValueLatticeUtils.h - Utils for solving lattices --------*- 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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//
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// This file declares common functions useful for performing data-flow analyses
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// that propagate values across function boundaries.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_ANALYSIS_VALUELATTICEUTILS_H
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#define LLVM_ANALYSIS_VALUELATTICEUTILS_H
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namespace llvm {
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class Function;
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class GlobalVariable;
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/// Determine if the values of the given function's arguments can be tracked
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/// interprocedurally. The value of an argument can be tracked if the function
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/// has local linkage and its address is not taken.
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bool canTrackArgumentsInterprocedurally(Function *F);
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/// Determine if the values of the given function's returns can be tracked
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/// interprocedurally. Return values can be tracked if the function has an
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/// exact definition and it doesn't have the "naked" attribute. Naked functions
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/// may contain assembly code that returns untrackable values.
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bool canTrackReturnsInterprocedurally(Function *F);
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/// Determine if the value maintained in the given global variable can be
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/// tracked interprocedurally. A value can be tracked if the global variable
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/// has local linkage and is only used by non-volatile loads and stores.
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bool canTrackGlobalVariableInterprocedurally(GlobalVariable *GV);
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} // end namespace llvm
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#endif // LLVM_ANALYSIS_VALUELATTICEUTILS_H
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