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to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
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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