[LLVMdev] compile error when using overloaded = operator of DenseMap

[Rekha R]

Hi,

I am trying to implement Available Expressions data flow analysis. I
created the following class (I am giving here code snippet.):

namespace {
  typedef DenseMap<Expression, uint32_t> DMTy;  //Expression is a class I
defined.
  struct DataFlowValue {
    DMTy ExprMap;
    llvm::BitVector* DFV;

  // Functions operating on the data //
    bool operator==(const DataFlowValue V) const;
    void top();  /* set all elements */
    void bot();  /* reset all elements */
    void set(DMTy emap);
    void merge(DataFlowValue V);  /* confluence operation  */
  };
}

with the following function definition:

void DataFlowValue::set(DMTy emap) {
  ExprMap = *emap;    //Line153:
}

When I compile, I get the following error:

/home/zeus/masterLLVM/llvm/include/llvm/ADT/DenseMap.h: In member function
‘void llvm::DenseMapBase<DerivedT, KeyT, ValueT, KeyInfoT>::destroyAll()
[with DerivedT = llvm::DenseMap<{anonymous}::Expression, unsigned int>,
KeyT = {anonymous}::Expression, ValueT = unsigned int, KeyInfoT =
llvm::DenseMapInfo<{anonymous}::Expression>]’:
/home/zeus/masterLLVM/llvm/include/llvm/ADT/DenseMap.h:600:5:
instantiated from ‘void llvm::DenseMap<KeyT, ValueT,
KeyInfoT>::copyFrom(const llvm::DenseMap<KeyT, ValueT, KeyInfoT>&) [with
KeyT = {anonymous}::Expression, ValueT = unsigned int, KeyInfoT =
llvm::DenseMapInfo<{anonymous}::Expression>, llvm::DenseMap<KeyT, ValueT,
KeyInfoT> = llvm::DenseMap<{anonymous}::Expression, unsigned int>]’
/home/zeus/masterLLVM/llvm/include/llvm/ADT/DenseMap.h:585:5:
instantiated from ‘llvm::DenseMap<KeyT, ValueT, KeyInfoT>&
llvm::DenseMap<KeyT, ValueT, KeyInfoT>::operator=(const
llvm::DenseMap<KeyT, ValueT, KeyInfoT>&) [with KeyT =
{anonymous}::Expression, ValueT = unsigned int, KeyInfoT =
llvm::DenseMapInfo<{anonymous}::Expression>, llvm::DenseMap<KeyT, ValueT,
KeyInfoT> = llvm::DenseMap<{anonymous}::Expression, unsigned int>]’
/home/zeus/masterLLVM/llvm/lib/Analysis/AVEAnalysis.cpp:153:13:
instantiated from here
/home/zeus/masterLLVM/llvm/include/llvm/ADT/DenseMap.h:256:7: error:
‘isEqual’ is not a member of ‘llvm::DenseMapInfo<{anonymous}::Expression>’
/home/zeus/masterLLVM/llvm/include/llvm/ADT/DenseMap.h:256:7: error:
‘isEqual’ is not a member of ‘llvm::DenseMapInfo<{anonymous}::Expression>’

Can someone help me solve the error?

-- 
Rekha
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