[FunctionAttrs] Inline the prototype attribute inference to an existing

[oota-llvm.git] / lib / Transforms / IPO / PartialInlining.cpp

diff --git a/lib/Transforms/IPO/PartialInlining.cpp b/lib/Transforms/IPO/PartialInlining.cpp
index 672b5621dfe5978ac28cf9fe851ce35fc90790e4..0c5c84bbccabe7bc6e4e3c6dd646ae739ebc9ddd 100644 (file)
--- a/lib/Transforms/IPO/PartialInlining.cpp
+++ b/lib/Transforms/IPO/PartialInlining.cpp
@@ -12,7 +12,6 @@
 //
 //===----------------------------------------------------------------------===//
 
-#define DEBUG_TYPE "partialinlining"
 #include "llvm/Transforms/IPO.h"
 #include "llvm/ADT/Statistic.h"
 #include "llvm/IR/CFG.h"
@@ -24,18 +23,20 @@
 #include "llvm/Transforms/Utils/CodeExtractor.h"
 using namespace llvm;
 
+#define DEBUG_TYPE "partialinlining"
+
 STATISTIC(NumPartialInlined, "Number of functions partially inlined");
 
 namespace {
   struct PartialInliner : public ModulePass {
-    virtual void getAnalysisUsage(AnalysisUsage &AU) const { }
+    void getAnalysisUsage(AnalysisUsage &AU) const override { }
     static char ID; // Pass identification, replacement for typeid
     PartialInliner() : ModulePass(ID) {
       initializePartialInlinerPass(*PassRegistry::getPassRegistry());
     }
-    
-    bool runOnModule(Module& M);
-    
+
+    bool runOnModule(Module& M) override;
+
   private:
     Function* unswitchFunction(Function* F);
   };
@@ -49,24 +50,24 @@ ModulePass* llvm::createPartialInliningPass() { return new PartialInliner(); }
 
 Function* PartialInliner::unswitchFunction(Function* F) {
   // First, verify that this function is an unswitching candidate...
-  BasicBlock* entryBlock = F->begin();
+  BasicBlock *entryBlock = &F->front();
   BranchInst *BR = dyn_cast<BranchInst>(entryBlock->getTerminator());
   if (!BR || BR->isUnconditional())
-    return 0;
+    return nullptr;
   
-  BasicBlock* returnBlock = 0;
-  BasicBlock* nonReturnBlock = 0;
+  BasicBlock* returnBlock = nullptr;
+  BasicBlock* nonReturnBlock = nullptr;
   unsigned returnCount = 0;
-  for (succ_iterator SI = succ_begin(entryBlock), SE = succ_end(entryBlock);
-       SI != SE; ++SI)
-    if (isa<ReturnInst>((*SI)->getTerminator())) {
-      returnBlock = *SI;
+  for (BasicBlock *BB : successors(entryBlock)) {
+    if (isa<ReturnInst>(BB->getTerminator())) {
+      returnBlock = BB;
       returnCount++;
     } else
-      nonReturnBlock = *SI;
+      nonReturnBlock = BB;
+  }
   
   if (returnCount != 1)
-    return 0;
+    return nullptr;
   
   // Clone the function, so that we can hack away on it.
   ValueToValueMapTy VMap;
@@ -88,18 +89,18 @@ Function* PartialInliner::unswitchFunction(Function* F) {
   // of which will go outside.
   BasicBlock* preReturn = newReturnBlock;
   newReturnBlock = newReturnBlock->splitBasicBlock(
-                                              newReturnBlock->getFirstNonPHI());
+      newReturnBlock->getFirstNonPHI()->getIterator());
   BasicBlock::iterator I = preReturn->begin();
-  BasicBlock::iterator Ins = newReturnBlock->begin();
+  Instruction *Ins = &newReturnBlock->front();
   while (I != preReturn->end()) {
     PHINode* OldPhi = dyn_cast<PHINode>(I);
     if (!OldPhi) break;
-    
-    PHINode* retPhi = PHINode::Create(OldPhi->getType(), 2, "", Ins);
+
+    PHINode *retPhi = PHINode::Create(OldPhi->getType(), 2, "", Ins);
     OldPhi->replaceAllUsesWith(retPhi);
     Ins = newReturnBlock->getFirstNonPHI();
-    
-    retPhi->addIncoming(I, preReturn);
+
+    retPhi->addIncoming(&*I, preReturn);
     retPhi->addIncoming(OldPhi->getIncomingValueForBlock(newEntryBlock),
                         newEntryBlock);
     OldPhi->removeIncomingValue(newEntryBlock);
@@ -115,8 +116,8 @@ Function* PartialInliner::unswitchFunction(Function* F) {
        FE = duplicateFunction->end(); FI != FE; ++FI)
     if (&*FI != newEntryBlock && &*FI != newReturnBlock &&
         &*FI != newNonReturnBlock)
-      toExtract.push_back(FI);
-      
+      toExtract.push_back(&*FI);
+
   // The CodeExtractor needs a dominator tree.
   DominatorTree DT;
   DT.recalculate(*duplicateFunction);
@@ -128,8 +129,8 @@ Function* PartialInliner::unswitchFunction(Function* F) {
   InlineFunctionInfo IFI;
   
   // Inline the top-level if test into all callers.
-  std::vector<User*> Users(duplicateFunction->use_begin(), 
-                           duplicateFunction->use_end());
+  std::vector<User *> Users(duplicateFunction->user_begin(),
+                            duplicateFunction->user_end());
   for (std::vector<User*>::iterator UI = Users.begin(), UE = Users.end();
        UI != UE; ++UI)
     if (CallInst *CI = dyn_cast<CallInst>(*UI))
@@ -162,9 +163,8 @@ bool PartialInliner::runOnModule(Module& M) {
     if (currFunc->use_empty()) continue;
     
     bool recursive = false;
-    for (Function::use_iterator UI = currFunc->use_begin(),
-         UE = currFunc->use_end(); UI != UE; ++UI)
-      if (Instruction* I = dyn_cast<Instruction>(*UI))
+    for (User *U : currFunc->users())
+      if (Instruction* I = dyn_cast<Instruction>(U))
         if (I->getParent()->getParent() == currFunc) {
           recursive = true;
           break;