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//===-- ConstantProp.h - Functions for Constant Propogation ------*- C++ -*--=//
//
// This family of functions are useful for performing constant propogation.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_TRANSFORMS_SCALAR_CONSTANT_PROPOGATION_H
#define LLVM_TRANSFORMS_SCALAR_CONSTANT_PROPOGATION_H
#include "llvm/BasicBlock.h"
class TerminatorInst;
class Pass;
//===----------------------------------------------------------------------===//
// Normal Constant Propogation Pass
//
Pass *createConstantPropogationPass();
// doConstantPropogation - Constant prop a specific instruction. Returns true
// and potentially moves the iterator if constant propogation was performed.
//
bool doConstantPropogation(BasicBlock *BB, BasicBlock::iterator &I);
// ConstantFoldTerminator - If a terminator instruction is predicated on a
// constant value, convert it into an unconditional branch to the constant
// destination. This is a nontrivial operation because the successors of this
// basic block must have their PHI nodes updated.
//
bool ConstantFoldTerminator(BasicBlock *BB, BasicBlock::iterator &I,
TerminatorInst *T);
//===----------------------------------------------------------------------===//
// Sparse Conditional Constant Propogation Pass
//
Pass *createSCCPPass();
#endif
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