Add CreateLifetimeStart and CreateLifetimeEnd to the IRBuilder, with plans to

use these soon.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131812 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/Support/IRBuilder.h

@@ -107,6 +107,10 @@ public:
       I->setDebugLoc(CurDbgLocation);
   }
 
+  /// getCurrentFunctionReturnType - Get the return type of the current function
+  /// that we're emitting into.
+  const Type *getCurrentFunctionReturnType() const;
+  
   /// InsertPoint - A saved insertion point.
   class InsertPoint {
     BasicBlock *Block;
@@ -195,6 +199,7 @@ public:
     return ConstantInt::get(getInt64Ty(), C);
   }
   
+  /// getInt - Get a constant integer value.
   ConstantInt *getInt(const APInt &AI) {
     return ConstantInt::get(Context, AI);
   }
@@ -247,10 +252,10 @@ public:
     return Type::getInt8PtrTy(Context, AddrSpace);
   }
 
-  /// getCurrentFunctionReturnType - Get the return type of the current function
-  /// that we're emitting into.
-  const Type *getCurrentFunctionReturnType() const;
-  
+  //===--------------------------------------------------------------------===//
+  // Intrinsic creation methods
+  //===--------------------------------------------------------------------===//
+
   /// CreateMemSet - Create and insert a memset to the specified pointer and the
   /// specified value.  If the pointer isn't an i8*, it will be converted.  If a
   /// TBAA tag is specified, it will be added to the instruction.
@@ -283,6 +288,15 @@ public:
   
   CallInst *CreateMemMove(Value *Dst, Value *Src, Value *Size, unsigned Align,
                           bool isVolatile = false, MDNode *TBAATag = 0);  
+
+  /// CreateLifetimeStart - Create a lifetime.start intrinsic.  If the pointer
+  /// isn't i8* it will be converted.
+  CallInst *CreateLifetimeStart(Value *Ptr, ConstantInt *Size = 0);
+
+  /// CreateLifetimeEnd - Create a lifetime.end intrinsic.  If the pointer isn't
+  /// i8* it will be converted.
+  CallInst *CreateLifetimeEnd(Value *Ptr, ConstantInt *Size = 0);
+
 private:
   Value *getCastedInt8PtrValue(Value *Ptr);
 };

lib/VMCore/IRBuilder.cpp

@@ -60,7 +60,6 @@ static CallInst *createCallHelper(Value *Callee, Value *const* Ops,
   return CI;  
 }
 
-
 CallInst *IRBuilderBase::
 CreateMemSet(Value *Ptr, Value *Val, Value *Size, unsigned Align,
              bool isVolatile, MDNode *TBAATag) {
@@ -118,3 +117,33 @@ CreateMemMove(Value *Dst, Value *Src, Value *Size, unsigned Align,
   
   return CI;  
 }
+
+CallInst *IRBuilderBase::CreateLifetimeStart(Value *Ptr, ConstantInt *Size) {
+  assert(isa<PointerType>(Ptr->getType()) &&
+	 "lifetime.start only applies to pointers.");
+  Ptr = getCastedInt8PtrValue(Ptr);
+  if (!Size)
+    Size = getInt64(-1);
+  else
+    assert(Size->getType() == getInt64Ty() &&
+	   "lifetime.start requires the size to be an i64");
+  Value *Ops[] = { Size, Ptr };
+  Module *M = BB->getParent()->getParent();
+  Value *TheFn = Intrinsic::getDeclaration(M, Intrinsic::lifetime_start);
+  return createCallHelper(TheFn, Ops, 2, this);
+}
+
+CallInst *IRBuilderBase::CreateLifetimeEnd(Value *Ptr, ConstantInt *Size) {
+  assert(isa<PointerType>(Ptr->getType()) &&
+	 "lifetime.end only applies to pointers.");
+  Ptr = getCastedInt8PtrValue(Ptr);
+  if (!Size)
+    Size = getInt64(-1);
+  else
+    assert(Size->getType() == getInt64Ty() &&
+	   "lifetime.end requires the size to be an i64");
+  Value *Ops[] = { Size, Ptr };
+  Module *M = BB->getParent()->getParent();
+  Value *TheFn = Intrinsic::getDeclaration(M, Intrinsic::lifetime_end);
+  return createCallHelper(TheFn, Ops, 2, this);
+}

unittests/Support/IRBuilderTest.cpp

@@ -0,0 +1,70 @@
+//===- llvm/unittest/Support/IRBuilderTest.cpp - IRBuilder tests ----------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Support/IRBuilder.h"
+#include "llvm/BasicBlock.h"
+#include "llvm/Function.h"
+#include "llvm/IntrinsicInst.h"
+#include "llvm/LLVMContext.h"
+#include "llvm/Module.h"
+#include "llvm/ADT/OwningPtr.h"
+
+#include "gtest/gtest.h"
+
+using namespace llvm;
+
+class IRBuilderTest : public testing::Test {
+protected:
+  virtual void SetUp() {
+    M.reset(new Module("MyModule", getGlobalContext()));
+    FunctionType *FTy = FunctionType::get(Type::getVoidTy(getGlobalContext()),
+                                          /*isVarArg=*/false);
+    Function *F = Function::Create(FTy, Function::ExternalLinkage, "", M.get());
+    BB = BasicBlock::Create(getGlobalContext(), "", F);
+  }
+
+  virtual void TearDown() {
+    BB = 0;
+    M.reset();
+  }
+
+  OwningPtr<Module> M;
+  BasicBlock *BB;
+};
+
+TEST_F(IRBuilderTest, Lifetime) {
+  IRBuilder<> Builder(BB);
+  AllocaInst *Var1 = Builder.CreateAlloca(Builder.getInt8Ty());
+  AllocaInst *Var2 = Builder.CreateAlloca(Builder.getInt32Ty());
+  AllocaInst *Var3 = Builder.CreateAlloca(Builder.getInt8Ty(),
+                                          Builder.getInt32(123));
+
+  CallInst *Start1 = Builder.CreateLifetimeStart(Var1);
+  CallInst *Start2 = Builder.CreateLifetimeStart(Var2);
+  CallInst *Start3 = Builder.CreateLifetimeStart(Var3, Builder.getInt64(100));
+
+  EXPECT_EQ(Start1->getArgOperand(0), Builder.getInt64(-1));
+  EXPECT_EQ(Start2->getArgOperand(0), Builder.getInt64(-1));
+  EXPECT_EQ(Start3->getArgOperand(0), Builder.getInt64(100));
+
+  EXPECT_EQ(Start1->getArgOperand(1), Var1);
+  EXPECT_NE(Start2->getArgOperand(1), Var2);
+  EXPECT_EQ(Start3->getArgOperand(1), Var3);
+
+  Value *End1 = Builder.CreateLifetimeEnd(Var1);
+  Builder.CreateLifetimeEnd(Var2);
+  Builder.CreateLifetimeEnd(Var3);
+
+  IntrinsicInst *II_Start1 = dyn_cast<IntrinsicInst>(Start1);
+  IntrinsicInst *II_End1 = dyn_cast<IntrinsicInst>(End1);
+  ASSERT_TRUE(II_Start1 != NULL);
+  EXPECT_EQ(II_Start1->getIntrinsicID(), Intrinsic::lifetime_start);
+  ASSERT_TRUE(II_End1 != NULL);
+  EXPECT_EQ(II_End1->getIntrinsicID(), Intrinsic::lifetime_end);
+}