Reapply r131605. This time with a fix, which is to use NoFolder.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131673 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Transforms/Utils/SimplifyCFG.cpp

@@ -33,6 +33,7 @@
 #include "llvm/Support/ConstantRange.h"
 #include "llvm/Support/Debug.h"
 #include "llvm/Support/IRBuilder.h"
+#include "llvm/Support/NoFolder.h"
 #include "llvm/Support/raw_ostream.h"
 #include <algorithm>
 #include <set>
@@ -908,6 +909,7 @@ HoistTerminator:
     NT->takeName(I1);
   }
 
+  IRBuilder<true, NoFolder> Builder(NT);
   // Hoisting one of the terminators from our successor is a great thing.
   // Unfortunately, the successors of the if/else blocks may have PHI nodes in
   // them.  If they do, all PHI entries for BB1/BB2 must agree for all PHI
@@ -924,11 +926,11 @@ HoistTerminator:
       // These values do not agree.  Insert a select instruction before NT
       // that determines the right value.
       SelectInst *&SI = InsertedSelects[std::make_pair(BB1V, BB2V)];
-      if (SI == 0) {
+      if (SI == 0) 
-        SI = SelectInst::Create(BI->getCondition(), BB1V, BB2V,
+        SI = cast<SelectInst>
-                                BB1V->getName()+"."+BB2V->getName(), NT);
+          (Builder.CreateSelect(BI->getCondition(), BB1V, BB2V,
-        SI->setDebugLoc(BI->getDebugLoc());
+                                BB1V->getName()+"."+BB2V->getName()));
-      }
+
       // Make the PHI node use the select for all incoming values for BB1/BB2
       for (unsigned i = 0, e = PN->getNumIncomingValues(); i != e; ++i)
         if (PN->getIncomingBlock(i) == BB1 || PN->getIncomingBlock(i) == BB2)
@@ -1086,14 +1088,16 @@ static bool SpeculativelyExecuteBB(BranchInst *BI, BasicBlock *BB1) {
 
   // Create a select whose true value is the speculatively executed value and
   // false value is the previously determined FalseV.
+  IRBuilder<true, NoFolder> Builder(BI);
   SelectInst *SI;
   if (Invert)
-    SI = SelectInst::Create(BrCond, FalseV, HInst,
+    SI = cast<SelectInst>
-                            FalseV->getName() + "." + HInst->getName(), BI);
+      (Builder.CreateSelect(BrCond, FalseV, HInst,
+                            FalseV->getName() + "." + HInst->getName()));
   else
-    SI = SelectInst::Create(BrCond, HInst, FalseV,
+    SI = cast<SelectInst>
-                            HInst->getName() + "." + FalseV->getName(), BI);
+      (Builder.CreateSelect(BrCond, HInst, FalseV,
-  SI->setDebugLoc(BI->getDebugLoc());
+                            HInst->getName() + "." + FalseV->getName()));
 
   // Make the PHI node use the select for all incoming values for "then" and
   // "if" blocks.
@@ -1232,8 +1236,7 @@ static bool FoldCondBranchOnPHI(BranchInst *BI, const TargetData *TD) {
 
 /// FoldTwoEntryPHINode - Given a BB that starts with the specified two-entry
 /// PHI node, see if we can eliminate it.
-static bool FoldTwoEntryPHINode(PHINode *PN, const TargetData *TD,
+static bool FoldTwoEntryPHINode(PHINode *PN, const TargetData *TD) {
-                                IRBuilder<> &Builder) {
   // Ok, this is a two entry PHI node.  Check to see if this is a simple "if
   // statement", which has a very simple dominance structure.  Basically, we
   // are trying to find the condition that is being branched on, which
@@ -1332,7 +1335,7 @@ static bool FoldTwoEntryPHINode(PHINode *PN, const TargetData *TD,
   // If we can still promote the PHI nodes after this gauntlet of tests,
   // do all of the PHI's now.
   Instruction *InsertPt = DomBlock->getTerminator();
-  Builder.SetInsertPoint(InsertPt);
+  IRBuilder<true, NoFolder> Builder(InsertPt);
   
   // Move all 'aggressive' instructions, which are defined in the
   // conditional parts of the if's up to the dominating block.
@@ -1460,6 +1463,7 @@ static bool SimplifyCondBranchToTwoReturns(BranchInst *BI,
 /// the predecessor and use logical operations to pick the right destination.
 bool llvm::FoldBranchToCommonDest(BranchInst *BI) {
   BasicBlock *BB = BI->getParent();
+
   Instruction *Cond = dyn_cast<Instruction>(BI->getCondition());
   if (Cond == 0 || (!isa<CmpInst>(Cond) && !isa<BinaryOperator>(Cond)) ||
     Cond->getParent() != BB || !Cond->hasOneUse())
@@ -1580,7 +1584,8 @@ bool llvm::FoldBranchToCommonDest(BranchInst *BI) {
     }
 
     DEBUG(dbgs() << "FOLDING BRANCH TO COMMON DEST:\n" << *PBI << *BB);
-    
+    IRBuilder<> Builder(PBI);    
+
     // If we need to invert the condition in the pred block to match, do so now.
     if (InvertPredCond) {
       Value *NewCond = PBI->getCondition();
@@ -1589,8 +1594,8 @@ bool llvm::FoldBranchToCommonDest(BranchInst *BI) {
         CmpInst *CI = cast<CmpInst>(NewCond);
         CI->setPredicate(CI->getInversePredicate());
       } else {
-        NewCond = BinaryOperator::CreateNot(NewCond,
+        NewCond = Builder.CreateNot(NewCond, 
-                                  PBI->getCondition()->getName()+".not", PBI);
+                                    PBI->getCondition()->getName()+".not");
       }
       
       PBI->setCondition(NewCond);
@@ -1617,9 +1622,9 @@ bool llvm::FoldBranchToCommonDest(BranchInst *BI) {
     New->takeName(Cond);
     Cond->setName(New->getName()+".old");
     
-    Instruction *NewCond = BinaryOperator::Create(Opc, PBI->getCondition(),
+    Instruction *NewCond = 
-                                                  New, "or.cond", PBI);
+      cast<Instruction>(Builder.CreateBinOp(Opc, PBI->getCondition(),
-    NewCond->setDebugLoc(PBI->getDebugLoc());
+                                            New, "or.cond"));
     PBI->setCondition(NewCond);
     if (PBI->getSuccessor(0) == BB) {
       AddPredecessorToBlock(TrueDest, PredBlock, BB);
@@ -1762,23 +1767,22 @@ static bool SimplifyCondBranchToCondBranch(BranchInst *PBI, BranchInst *BI) {
   }  
   
   DEBUG(dbgs() << *PBI->getParent()->getParent());
-  
+
   // BI may have other predecessors.  Because of this, we leave
   // it alone, but modify PBI.
   
   // Make sure we get to CommonDest on True&True directions.
   Value *PBICond = PBI->getCondition();
+  IRBuilder<true, NoFolder> Builder(PBI);
   if (PBIOp)
-    PBICond = BinaryOperator::CreateNot(PBICond,
+    PBICond = Builder.CreateNot(PBICond, PBICond->getName()+".not");
-                                        PBICond->getName()+".not",
+
-                                        PBI);
   Value *BICond = BI->getCondition();
   if (BIOp)
-    BICond = BinaryOperator::CreateNot(BICond,
+    BICond = Builder.CreateNot(BICond, BICond->getName()+".not");
-                                       BICond->getName()+".not",
+
-                                       PBI);
   // Merge the conditions.
-  Value *Cond = BinaryOperator::CreateOr(PBICond, BICond, "brmerge", PBI);
+  Value *Cond = Builder.CreateOr(PBICond, BICond, "brmerge");
   
   // Modify PBI to branch on the new condition to the new dests.
   PBI->setCondition(Cond);
@@ -1801,8 +1805,8 @@ static bool SimplifyCondBranchToCondBranch(BranchInst *PBI, BranchInst *BI) {
     Value *PBIV = PN->getIncomingValue(PBBIdx);
     if (BIV != PBIV) {
       // Insert a select in PBI to pick the right value.
-      Value *NV = SelectInst::Create(PBICond, PBIV, BIV,
+      Value *NV = cast<SelectInst>
-                                     PBIV->getName()+".mux", PBI);
+        (Builder.CreateSelect(PBICond, PBIV, BIV, PBIV->getName()+".mux"));
       PN->setIncomingValue(PBBIdx, NV);
     }
   }
@@ -2665,7 +2669,7 @@ bool SimplifyCFGOpt::run(BasicBlock *BB) {
   // eliminate it, do so now.
   if (PHINode *PN = dyn_cast<PHINode>(BB->begin()))
     if (PN->getNumIncomingValues() == 2)
-      Changed |= FoldTwoEntryPHINode(PN, TD, Builder);
+      Changed |= FoldTwoEntryPHINode(PN, TD);
 
   Builder.SetInsertPoint(BB->getTerminator());
   if (BranchInst *BI = dyn_cast<BranchInst>(BB->getTerminator())) {