[IRBuilder] Introduce helpers for and/or of multiple values at once

We had versions of this code scattered around, so consolidate into one location.

Not strictly NFC since the order of intermediate results may change in some places, but since these operations are associatives, should not change results.

llvm-svn: 365259

include/llvm/IR/IRBuilder.h

@@ -1214,6 +1214,14 @@ public:
     return CreateAnd(LHS, ConstantInt::get(LHS->getType(), RHS), Name);
   }
 
+  Value *CreateAnd(ArrayRef<Value*> Ops) {
+    assert(!Ops.empty());
+    Value *Accum = Ops[0];
+    for (unsigned i = 1; i < Ops.size(); i++)
+      Accum = CreateAnd(Accum, Ops[i]);
+    return Accum;
+  }
+
   Value *CreateOr(Value *LHS, Value *RHS, const Twine &Name = "") {
     if (auto *RC = dyn_cast<Constant>(RHS)) {
       if (RC->isNullValue())
@@ -1232,6 +1240,14 @@ public:
     return CreateOr(LHS, ConstantInt::get(LHS->getType(), RHS), Name);
   }
 
+  Value *CreateOr(ArrayRef<Value*> Ops) {
+    assert(!Ops.empty());
+    Value *Accum = Ops[0];
+    for (unsigned i = 1; i < Ops.size(); i++)
+      Accum = CreateOr(Accum, Ops[i]);
+    return Accum;
+  }
+
   Value *CreateXor(Value *LHS, Value *RHS, const Twine &Name = "") {
     if (Value *V = foldConstant(Instruction::Xor, LHS, RHS, Name)) return V;
     return Insert(BinaryOperator::CreateXor(LHS, RHS), Name);

lib/Transforms/Instrumentation/MemorySanitizer.cpp

@@ -1943,7 +1943,7 @@ struct MemorySanitizerVisitor : public InstVisitor<MemorySanitizerVisitor> {
     Value *S1S2 = IRB.CreateAnd(S1, S2);
     Value *V1S2 = IRB.CreateAnd(V1, S2);
     Value *S1V2 = IRB.CreateAnd(S1, V2);
-    setShadow(&I, IRB.CreateOr(S1S2, IRB.CreateOr(V1S2, S1V2)));
+    setShadow(&I, IRB.CreateOr({S1S2, V1S2, S1V2}));
     setOriginForNaryOp(I);
   }
 
@@ -1965,7 +1965,7 @@ struct MemorySanitizerVisitor : public InstVisitor<MemorySanitizerVisitor> {
     Value *S1S2 = IRB.CreateAnd(S1, S2);
     Value *V1S2 = IRB.CreateAnd(V1, S2);
     Value *S1V2 = IRB.CreateAnd(S1, V2);
-    setShadow(&I, IRB.CreateOr(S1S2, IRB.CreateOr(V1S2, S1V2)));
+    setShadow(&I, IRB.CreateOr({S1S2, V1S2, S1V2}));
     setOriginForNaryOp(I);
   }
 
@@ -3508,7 +3508,7 @@ struct MemorySanitizerVisitor : public InstVisitor<MemorySanitizerVisitor> {
       D = CreateAppToShadowCast(IRB, D);
 
       // Result shadow if condition shadow is 1.
-      Sa1 = IRB.CreateOr(IRB.CreateXor(C, D), IRB.CreateOr(Sc, Sd));
+      Sa1 = IRB.CreateOr({IRB.CreateXor(C, D), Sc, Sd});
     }
     Value *Sa = IRB.CreateSelect(Sb, Sa1, Sa0, "_msprop_select");
     setShadow(&I, Sa);

lib/Transforms/Scalar/LoopPredication.cpp

@@ -793,14 +793,9 @@ bool LoopPredication::widenGuardConditions(IntrinsicInst *Guard,
 
   // Emit the new guard condition
   IRBuilder<> Builder(findInsertPt(Guard, Checks));
-  Value *LastCheck = nullptr;
-  for (auto *Check : Checks)
-    if (!LastCheck)
-      LastCheck = Check;
-    else
-      LastCheck = Builder.CreateAnd(LastCheck, Check);
+  Value *AllChecks = Builder.CreateAnd(Checks);
   auto *OldCond = Guard->getOperand(0);
-  Guard->setOperand(0, LastCheck);
+  Guard->setOperand(0, AllChecks);
   RecursivelyDeleteTriviallyDeadInstructions(OldCond);
 
   LLVM_DEBUG(dbgs() << "Widened checks = " << NumWidened << "\n");
@@ -824,14 +819,9 @@ bool LoopPredication::widenWidenableBranchGuardConditions(
 
   // Emit the new guard condition
   IRBuilder<> Builder(findInsertPt(BI, Checks));
-  Value *LastCheck = nullptr;
-  for (auto *Check : Checks)
-    if (!LastCheck)
-      LastCheck = Check;
-    else
-      LastCheck = Builder.CreateAnd(LastCheck, Check);
+  Value *AllChecks = Builder.CreateAnd(Checks);
   auto *OldCond = BI->getCondition();
-  BI->setCondition(LastCheck);
+  BI->setCondition(AllChecks);
   assert(isGuardAsWidenableBranch(BI) &&
          "Stopped being a guard after transform?");
   RecursivelyDeleteTriviallyDeadInstructions(OldCond);

lib/Transforms/Scalar/SimpleLoopUnswitch.cpp

@@ -180,14 +180,9 @@ static void buildPartialUnswitchConditionalBranch(BasicBlock &BB,
                                                   BasicBlock &UnswitchedSucc,
                                                   BasicBlock &NormalSucc) {
   IRBuilder<> IRB(&BB);
-  Value *Cond = Invariants.front();
-  for (Value *Invariant :
-       make_range(std::next(Invariants.begin()), Invariants.end()))
-    if (Direction)
-      Cond = IRB.CreateOr(Cond, Invariant);
-    else
-      Cond = IRB.CreateAnd(Cond, Invariant);
-
+  
+  Value *Cond = Direction ? IRB.CreateOr(Invariants) :
+    IRB.CreateAnd(Invariants);
   IRB.CreateCondBr(Cond, Direction ? &UnswitchedSucc : &NormalSucc,
                    Direction ? &NormalSucc : &UnswitchedSucc);
 }