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