This mapping is between pointers, which DenseMap is particularly good
at. Most targets aren't really affected, but if there's a lot of
subregister composition this can shave off a good chunk of time from
generating registers.
llvm-svn: 279875
std::string getQualifiedName() const;
// Map of composite subreg indices.
- typedef std::map<CodeGenSubRegIndex *, CodeGenSubRegIndex *,
- deref<llvm::less>> CompMap;
+ typedef DenseMap<CodeGenSubRegIndex *, CodeGenSubRegIndex *> CompMap;
// Returns the subreg index that results from composing this with Idx.
// Returns NULL if this and Idx don't compose.