/usr/include/llvm-5.0/llvm/Analysis/ObjectUtils.h is in llvm-5.0-dev 1:5.0.1-4.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 | //===- Analysis/ObjectUtils.h - analysis utils for object files -*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_ANALYSIS_OBJECT_UTILS_H
#define LLVM_ANALYSIS_OBJECT_UTILS_H
#include "llvm/IR/GlobalVariable.h"
namespace llvm {
/// True if GV can be left out of the object symbol table. This is the case
/// for linkonce_odr values whose address is not significant. While legal, it is
/// not normally profitable to omit them from the .o symbol table. Using this
/// analysis makes sense when the information can be passed down to the linker
/// or we are in LTO.
inline bool canBeOmittedFromSymbolTable(const GlobalValue *GV) {
if (!GV->hasLinkOnceODRLinkage())
return false;
// We assume that anyone who sets global unnamed_addr on a non-constant knows
// what they're doing.
if (GV->hasGlobalUnnamedAddr())
return true;
// If it is a non constant variable, it needs to be uniqued across shared
// objects.
if (auto *Var = dyn_cast<GlobalVariable>(GV))
if (!Var->isConstant())
return false;
return GV->hasAtLeastLocalUnnamedAddr();
}
}
#endif
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