1 files changed, 0 insertions, 113 deletions
diff --git a/lib/Transforms/Scalar/ValuePropagation.cpp b/lib/Transforms/Scalar/ValuePropagation.cpp
deleted file mode 100644
index ae58eaf..0000000
--- a/lib/Transforms/Scalar/ValuePropagation.cpp
+++ /dev/null
@@ -1,113 +0,0 @@
-//===- ValuePropagation.cpp - Propagate information derived control flow --===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file implements the Value Propagation pass.
-//
-//===----------------------------------------------------------------------===//
-
-#define DEBUG_TYPE "value-propagation"
-#include "llvm/Transforms/Scalar.h"
-#include "llvm/Function.h"
-#include "llvm/Instructions.h"
-#include "llvm/Pass.h"
-#include "llvm/Analysis/LazyValueInfo.h"
-#include "llvm/Transforms/Utils/Local.h"
-using namespace llvm;
-
-namespace {
-  class ValuePropagation : public FunctionPass {
-    LazyValueInfo *LVI;
-    
-    bool processSelect(SelectInst *SI);
-    bool processPHI(PHINode *P);
-    
-  public:
-    static char ID;
-    ValuePropagation(): FunctionPass(ID) { }
-    
-    bool runOnFunction(Function &F);
-    
-    virtual void getAnalysisUsage(AnalysisUsage &AU) const {
-      AU.addRequired<LazyValueInfo>();
-    }
-  };
-}
-
-char ValuePropagation::ID = 0;
-INITIALIZE_PASS(ValuePropagation, "value-propagation",
-                "Value Propagation", false, false);
-
-// Public interface to the Value Propagation pass
-Pass *llvm::createValuePropagationPass() {
-  return new ValuePropagation();
-}
-
-bool ValuePropagation::processSelect(SelectInst *S) {
-  Constant *C = LVI->getConstant(S->getOperand(0), S->getParent());
-  if (!C) return false;
-  
-  ConstantInt *CI = dyn_cast<ConstantInt>(C);
-  if (!CI) return false;
-  
-  if (CI->isZero()) {
-    S->replaceAllUsesWith(S->getOperand(2));
-    S->eraseFromParent();
-  } else if (CI->isOne()) {
-    S->replaceAllUsesWith(S->getOperand(1));
-    S->eraseFromParent();
-  } else {
-    assert(0 && "Select on constant is neither 0 nor 1?");
-  }
-  
-  return true;
-}
-
-bool ValuePropagation::processPHI(PHINode *P) {
-  bool changed = false;
-  
-  BasicBlock *BB = P->getParent();
-  for (unsigned i = 0; i < P->getNumIncomingValues(); ++i) {
-    Constant *C = LVI->getConstantOnEdge(P->getIncomingValue(i),
-                                         P->getIncomingBlock(i),
-                                         BB);
-    if (!C || C == P->getIncomingValue(i)) continue;
-    
-    P->setIncomingValue(i, C);
-    changed = true;
-  }
-  
-  if (Value *ConstVal = P->hasConstantValue()) {
-    P->replaceAllUsesWith(ConstVal);
-    P->eraseFromParent();
-    changed = true;
-  }
-  
-  return changed;
-}
-
-bool ValuePropagation::runOnFunction(Function &F) {
-  LVI = &getAnalysis<LazyValueInfo>();
-  
-  bool changed = false;
-  
-  for (Function::iterator FI = F.begin(), FE = F.end(); FI != FE; ++FI)
-    for (BasicBlock::iterator BI = FI->begin(), BE = FI->end(); BI != BE; ) {
-      Instruction *II = BI++;
-      if (SelectInst *SI = dyn_cast<SelectInst>(II))
-        changed |= processSelect(SI);
-      else if (PHINode *P = dyn_cast<PHINode>(II))
-        changed |= processPHI(P);
-    }
-  
-  if (changed)
-    for (Function::iterator FI = F.begin(), FE = F.end(); FI != FE; ++FI)
-      SimplifyInstructionsInBlock(FI);
-  
-  return changed;
-}