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查看 LLVM Demo，创建常量字符串的官方方法是：

常量* consStr = ConstantArray::get(mod->getContext(), "hello", true);

但是，它不起作用！我会得到关于以下的编译错误：

test.cc:860:78: error: no matching function for call to llvm::ConstantArray::get(llvm::LLVMContext&, char*&, bool)’
/remote/vgrnd66/wli/Tools/llvm-3.1/include/llvm/Constants.h:354:20: note: candidate is: static llvm::Constant* llvm::ConstantArray::get(llvm::ArrayType*, llvm::ArrayRef<llvm::Constant*>)

看llvm源码，没有成员函数支持

llvm::ConstantArray::get(llvm::LLVMContext&, char*&, bool)

我正在使用 llvm3.1。

我的代码有什么问题，或者这个构造函数在新源中被删除了吗？

这是 LLVM 源代码的区别。

LLVM2.8

class ConstantArray : public Constant {

  // ConstantArray accessors
  static Constant *get(const ArrayType *T, const std::vector<Constant*> &V);
  static Constant *get(const ArrayType *T, Constant *const *Vals,
                       unsigned NumVals);

  /// This method constructs a ConstantArray and initializes it with a text
  /// string. The default behavior (AddNull==true) causes a null terminator to
  /// be placed at the end of the array. This effectively increases the length
  /// of the array by one (you've been warned).  However, in some situations
  /// this is not desired so if AddNull==false then the string is copied without
  /// null termination.
  static Constant *get(LLVMContext &Context, StringRef Initializer,
                       bool AddNull = true);
}

LLVM3.1

class ConstantArray : public Constant {
public:
  // ConstantArray accessors
  static Constant *get(ArrayType *T, ArrayRef<Constant*> V);

}

显然，2.8 中有 3 个构造函数，但 3.1 中只有一个用于 ConstantArray 的构造函数。现在我不知道如何创建一个常量字符串...... :(

任何帮助都值得赞赏！

谢谢！

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1 回答 1

4

好的。我发现它已移至 ConstantDataArray。LLVM 演示 cgi 似乎已过时:)。

class ConstantDataArray : public ConstantDataSequential {
  /// getString - This method constructs a CDS and initializes it with a text
  /// string. The default behavior (AddNull==true) causes a null terminator to
  /// be placed at the end of the array (increasing the length of the string by
  /// one more than the StringRef would normally indicate.  Pass AddNull=false
  /// to disable this behavior.
  static Constant *getString(LLVMContext &Context, StringRef Initializer,
                             bool AddNull = true);

}
于 2012-11-02T03:36:45.760 回答