Update LLVM to r86025.

1 files changed, 0 insertions, 265 deletions

diff --git a/lib/Analysis/MallocHelper.cpp b/lib/Analysis/MallocHelper.cpp
deleted file mode 100644
index e7bb41e..0000000
--- a/lib/Analysis/MallocHelper.cpp
+++ /dev/null
@@ -1,265 +0,0 @@
-//===-- MallocHelper.cpp - Functions to identify malloc calls -------------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This family of functions identifies calls to malloc, bitcasts of malloc
-// calls, and the types and array sizes associated with them.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/Analysis/MallocHelper.h"
-#include "llvm/Constants.h"
-#include "llvm/Instructions.h"
-#include "llvm/Module.h"
-#include "llvm/Analysis/ConstantFolding.h"
-using namespace llvm;
-
-//===----------------------------------------------------------------------===//
-//  malloc Call Utility Functions.
-//
-
-/// isMalloc - Returns true if the the value is either a malloc call or a
-/// bitcast of the result of a malloc call.
-bool llvm::isMalloc(const Value* I) {
-  return extractMallocCall(I) || extractMallocCallFromBitCast(I);
-}
-
-static bool isMallocCall(const CallInst *CI) {
-  if (!CI)
-    return false;
-
-  const Module* M = CI->getParent()->getParent()->getParent();
-  Function *MallocFunc = M->getFunction("malloc");
-
-  if (CI->getOperand(0) != MallocFunc)
-    return false;
-
-  // Check malloc prototype.
-  // FIXME: workaround for PR5130, this will be obsolete when a nobuiltin 
-  // attribute will exist.
-  const FunctionType *FTy = MallocFunc->getFunctionType();
-  if (FTy->getNumParams() != 1)
-    return false;
-  if (IntegerType *ITy = dyn_cast<IntegerType>(FTy->param_begin()->get())) {
-    if (ITy->getBitWidth() != 32 && ITy->getBitWidth() != 64)
-      return false;
-    return true;
-  }
-
-  return false;
-}
-
-/// extractMallocCall - Returns the corresponding CallInst if the instruction
-/// is a malloc call.  Since CallInst::CreateMalloc() only creates calls, we
-/// ignore InvokeInst here.
-const CallInst* llvm::extractMallocCall(const Value* I) {
-  const CallInst *CI = dyn_cast<CallInst>(I);
-  return (isMallocCall(CI)) ? CI : NULL;
-}
-
-CallInst* llvm::extractMallocCall(Value* I) {
-  CallInst *CI = dyn_cast<CallInst>(I);
-  return (isMallocCall(CI)) ? CI : NULL;
-}
-
-static bool isBitCastOfMallocCall(const BitCastInst* BCI) {
-  if (!BCI)
-    return false;
-    
-  return isMallocCall(dyn_cast<CallInst>(BCI->getOperand(0)));
-}
-
-/// extractMallocCallFromBitCast - Returns the corresponding CallInst if the
-/// instruction is a bitcast of the result of a malloc call.
-CallInst* llvm::extractMallocCallFromBitCast(Value* I) {
-  BitCastInst *BCI = dyn_cast<BitCastInst>(I);
-  return (isBitCastOfMallocCall(BCI)) ? cast<CallInst>(BCI->getOperand(0))
-                                      : NULL;
-}
-
-const CallInst* llvm::extractMallocCallFromBitCast(const Value* I) {
-  const BitCastInst *BCI = dyn_cast<BitCastInst>(I);
-  return (isBitCastOfMallocCall(BCI)) ? cast<CallInst>(BCI->getOperand(0))
-                                      : NULL;
-}
-
-static bool isArrayMallocHelper(const CallInst *CI, LLVMContext &Context,
-                                const TargetData* TD) {
-  if (!CI)
-    return false;
-
-  const Type* T = getMallocAllocatedType(CI);
-
-  // We can only indentify an array malloc if we know the type of the malloc 
-  // call.
-  if (!T) return false;
-
-  Value* MallocArg = CI->getOperand(1);
-  Constant *ElementSize = ConstantExpr::getSizeOf(T);
-  ElementSize = ConstantExpr::getTruncOrBitCast(ElementSize, 
-                                                MallocArg->getType());
-  Constant *FoldedElementSize = ConstantFoldConstantExpression(
-                                       cast<ConstantExpr>(ElementSize), 
-                                       Context, TD);
-
-
-  if (isa<ConstantExpr>(MallocArg))
-    return (MallocArg != ElementSize);
-
-  BinaryOperator *BI = dyn_cast<BinaryOperator>(MallocArg);
-  if (!BI)
-    return false;
-
-  if (BI->getOpcode() == Instruction::Mul)
-    // ArraySize * ElementSize
-    if (BI->getOperand(1) == ElementSize ||
-        (FoldedElementSize && BI->getOperand(1) == FoldedElementSize))
-      return true;
-
-  // TODO: Detect case where MallocArg mul has been transformed to shl.
-
-  return false;
-}
-
-/// isArrayMalloc - Returns the corresponding CallInst if the instruction 
-/// matches the malloc call IR generated by CallInst::CreateMalloc().  This 
-/// means that it is a malloc call with one bitcast use AND the malloc call's 
-/// size argument is:
-///  1. a constant not equal to the size of the malloced type
-/// or
-///  2. the result of a multiplication by the size of the malloced type
-/// Otherwise it returns NULL.
-/// The unique bitcast is needed to determine the type/size of the array
-/// allocation.
-CallInst* llvm::isArrayMalloc(Value* I, LLVMContext &Context,
-                              const TargetData* TD) {
-  CallInst *CI = extractMallocCall(I);
-  return (isArrayMallocHelper(CI, Context, TD)) ? CI : NULL;
-}
-
-const CallInst* llvm::isArrayMalloc(const Value* I, LLVMContext &Context,
-                                    const TargetData* TD) {
-  const CallInst *CI = extractMallocCall(I);
-  return (isArrayMallocHelper(CI, Context, TD)) ? CI : NULL;
-}
-
-/// getMallocType - Returns the PointerType resulting from the malloc call.
-/// This PointerType is the result type of the call's only bitcast use.
-/// If there is no unique bitcast use, then return NULL.
-const PointerType* llvm::getMallocType(const CallInst* CI) {
-  assert(isMalloc(CI) && "GetMallocType and not malloc call");
-  
-  const BitCastInst* BCI = NULL;
-  
-  // Determine if CallInst has a bitcast use.
-  for (Value::use_const_iterator UI = CI->use_begin(), E = CI->use_end();
-       UI != E; )
-    if ((BCI = dyn_cast<BitCastInst>(cast<Instruction>(*UI++))))
-      break;
-
-  // Malloc call has 1 bitcast use and no other uses, so type is the bitcast's
-  // destination type.
-  if (BCI && CI->hasOneUse())
-    return cast<PointerType>(BCI->getDestTy());
-
-  // Malloc call was not bitcast, so type is the malloc function's return type.
-  if (!BCI)
-    return cast<PointerType>(CI->getType());
-
-  // Type could not be determined.
-  return NULL;
-}
-
-/// getMallocAllocatedType - Returns the Type allocated by malloc call. This
-/// Type is the result type of the call's only bitcast use. If there is no
-/// unique bitcast use, then return NULL.
-const Type* llvm::getMallocAllocatedType(const CallInst* CI) {
-  const PointerType* PT = getMallocType(CI);
-  return PT ? PT->getElementType() : NULL;
-}
-
-/// isSafeToGetMallocArraySize - Returns true if the array size of a malloc can
-/// be determined.  It can be determined in these 3 cases of malloc codegen:
-/// 1. non-array malloc: The malloc's size argument is a constant and equals the ///    size of the type being malloced.
-/// 2. array malloc: This is a malloc call with one bitcast use AND the malloc
-///    call's size argument is a constant multiple of the size of the malloced
-///    type.
-/// 3. array malloc: This is a malloc call with one bitcast use AND the malloc
-///    call's size argument is the result of a multiplication by the size of the
-///    malloced type.
-/// Otherwise returns false.
-static bool isSafeToGetMallocArraySize(const CallInst *CI,
-                                       LLVMContext &Context,
-                                       const TargetData* TD) {
-  if (!CI)
-    return false;
-
-  // Type must be known to determine array size.
-  const Type* T = getMallocAllocatedType(CI);
-  if (!T) return false;
-
-  Value* MallocArg = CI->getOperand(1);
-  Constant *ElementSize = ConstantExpr::getSizeOf(T);
-  ElementSize = ConstantExpr::getTruncOrBitCast(ElementSize, 
-                                                MallocArg->getType());
-
-  // First, check if it is a non-array malloc.
-  if (isa<ConstantExpr>(MallocArg) && (MallocArg == ElementSize))
-    return true;
-
-  // Second, check if it can be determined that this is an array malloc.
-  return isArrayMallocHelper(CI, Context, TD);
-}
-
-/// isConstantOne - Return true only if val is constant int 1.
-static bool isConstantOne(Value *val) {
-  return isa<ConstantInt>(val) && cast<ConstantInt>(val)->isOne();
-}
-
-/// getMallocArraySize - Returns the array size of a malloc call.  For array
-/// mallocs, the size is computated in 1 of 3 ways:
-///  1. If the element type is of size 1, then array size is the argument to 
-///     malloc.
-///  2. Else if the malloc's argument is a constant, the array size is that
-///     argument divided by the element type's size.
-///  3. Else the malloc argument must be a multiplication and the array size is
-///     the first operand of the multiplication.
-/// For non-array mallocs, the computed size is constant 1. 
-/// This function returns NULL for all mallocs whose array size cannot be
-/// determined.
-Value* llvm::getMallocArraySize(CallInst* CI, LLVMContext &Context,
-                                const TargetData* TD) {
-  if (!isSafeToGetMallocArraySize(CI, Context, TD))
-    return NULL;
-
-  // Match CreateMalloc's use of constant 1 array-size for non-array mallocs.
-  if (!isArrayMalloc(CI, Context, TD))
-    return ConstantInt::get(CI->getOperand(1)->getType(), 1);
-
-  Value* MallocArg = CI->getOperand(1);
-  assert(getMallocAllocatedType(CI) && "getMallocArraySize and no type");
-  Constant *ElementSize = ConstantExpr::getSizeOf(getMallocAllocatedType(CI));
-  ElementSize = ConstantExpr::getTruncOrBitCast(ElementSize, 
-                                                MallocArg->getType());
-
-  Constant* CO = dyn_cast<Constant>(MallocArg);
-  BinaryOperator* BO = dyn_cast<BinaryOperator>(MallocArg);
-  assert((isConstantOne(ElementSize) || CO || BO) &&
-         "getMallocArraySize and malformed malloc IR");
-      
-  if (isConstantOne(ElementSize))
-    return MallocArg;
-    
-  if (CO)
-    return CO->getOperand(0);
-    
-  // TODO: Detect case where MallocArg mul has been transformed to shl.
-
-  assert(BO && "getMallocArraySize not constant but not multiplication either");
-  return BO->getOperand(0);
-}