2001-10-18 20:05:30 +00:00
|
|
|
//===- llvm/Transforms/ConstantMerge.h - Merge duplicate consts --*- C++ -*--=//
|
|
|
|
//
|
|
|
|
// This file defines the interface to a pass that merges duplicate global
|
|
|
|
// constants together into a single constant that is shared. This is useful
|
|
|
|
// because some passes (ie TraceValues) insert a lot of string constants into
|
|
|
|
// the program, regardless of whether or not they duplicate an existing string.
|
|
|
|
//
|
|
|
|
// Algorithm: ConstantMerge is designed to build up a map of available constants
|
|
|
|
// and elminate duplicates when it is initialized.
|
|
|
|
//
|
|
|
|
// The DynamicConstantMerge method is a superset of the ConstantMerge algorithm
|
|
|
|
// that checks for each method to see if constants have been added to the
|
|
|
|
// constant pool since it was last run... if so, it processes them.
|
|
|
|
//
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
|
|
|
|
#ifndef LLVM_TRANSFORMS_CONSTANTMERGE_H
|
|
|
|
#define LLVM_TRANSFORMS_CONSTANTMERGE_H
|
|
|
|
|
2002-02-26 21:46:54 +00:00
|
|
|
class Pass;
|
|
|
|
Pass *createConstantMergePass();
|
|
|
|
Pass *createDynamicConstantMergePass();
|
2001-10-18 20:05:30 +00:00
|
|
|
|
|
|
|
#endif
|