//
//===----------------------------------------------------------------------===//
-#define DEBUG_TYPE "memory-builtins"
#include "llvm/Analysis/MemoryBuiltins.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/Statistic.h"
+#include "llvm/Analysis/TargetLibraryInfo.h"
#include "llvm/Analysis/ValueTracking.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/GlobalVariable.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Support/raw_ostream.h"
-#include "llvm/Target/TargetLibraryInfo.h"
#include "llvm/Transforms/Utils/Local.h"
using namespace llvm;
+#define DEBUG_TYPE "memory-builtins"
+
enum AllocType {
OpNewLike = 1<<0, // allocates; never returns null
MallocLike = 1<<1 | OpNewLike, // allocates; may return null
return isMallocLikeFn(I, TLI) ? dyn_cast<CallInst>(I) : nullptr;
}
-static Value *computeArraySize(const CallInst *CI, const DataLayout *DL,
+static Value *computeArraySize(const CallInst *CI, const DataLayout &DL,
const TargetLibraryInfo *TLI,
bool LookThroughSExt = false) {
if (!CI)
// The size of the malloc's result type must be known to determine array size.
Type *T = getMallocAllocatedType(CI, TLI);
- if (!T || !T->isSized() || !DL)
+ if (!T || !T->isSized())
return nullptr;
- unsigned ElementSize = DL->getTypeAllocSize(T);
+ unsigned ElementSize = DL.getTypeAllocSize(T);
if (StructType *ST = dyn_cast<StructType>(T))
- ElementSize = DL->getStructLayout(ST)->getSizeInBytes();
+ ElementSize = DL.getStructLayout(ST)->getSizeInBytes();
// If malloc call's arg can be determined to be a multiple of ElementSize,
// return the multiple. Otherwise, return NULL.
return nullptr;
}
-/// isArrayMalloc - Returns the corresponding CallInst if the instruction
-/// is a call to malloc whose array size can be determined and the array size
-/// is not constant 1. Otherwise, return NULL.
-const CallInst *llvm::isArrayMalloc(const Value *I,
- const DataLayout *DL,
- const TargetLibraryInfo *TLI) {
- const CallInst *CI = extractMallocCall(I, TLI);
- Value *ArraySize = computeArraySize(CI, DL, TLI);
-
- if (ConstantInt *ConstSize = dyn_cast_or_null<ConstantInt>(ArraySize))
- if (ConstSize->isOne())
- return CI;
-
- // CI is a non-array malloc or we can't figure out that it is an array malloc.
- return nullptr;
-}
-
/// getMallocType - Returns the PointerType resulting from the malloc call.
/// The PointerType depends on the number of bitcast uses of the malloc call:
/// 0: PointerType is the calls' return type.
/// then return that multiple. For non-array mallocs, the multiple is
/// constant 1. Otherwise, return NULL for mallocs whose array size cannot be
/// determined.
-Value *llvm::getMallocArraySize(CallInst *CI, const DataLayout *DL,
+Value *llvm::getMallocArraySize(CallInst *CI, const DataLayout &DL,
const TargetLibraryInfo *TLI,
bool LookThroughSExt) {
assert(isMallocLikeFn(CI, TLI) && "getMallocArraySize and not malloc call");
if (!CI || isa<IntrinsicInst>(CI))
return nullptr;
Function *Callee = CI->getCalledFunction();
- if (Callee == nullptr || !Callee->isDeclaration())
+ if (Callee == nullptr)
return nullptr;
StringRef FnName = Callee->getName();
TLIFn == LibFunc::ZdlPv || // operator delete(void*)
TLIFn == LibFunc::ZdaPv) // operator delete[](void*)
ExpectedNumParams = 1;
- else if (TLIFn == LibFunc::ZdlPvRKSt9nothrow_t || // delete(void*, nothrow)
+ else if (TLIFn == LibFunc::ZdlPvj || // delete(void*, uint)
+ TLIFn == LibFunc::ZdlPvm || // delete(void*, ulong)
+ TLIFn == LibFunc::ZdlPvRKSt9nothrow_t || // delete(void*, nothrow)
+ TLIFn == LibFunc::ZdaPvj || // delete[](void*, uint)
+ TLIFn == LibFunc::ZdaPvm || // delete[](void*, ulong)
TLIFn == LibFunc::ZdaPvRKSt9nothrow_t) // delete[](void*, nothrow)
ExpectedNumParams = 2;
else
/// object size in Size if successful, and false otherwise.
/// If RoundToAlign is true, then Size is rounded up to the aligment of allocas,
/// byval arguments, and global variables.
-bool llvm::getObjectSize(const Value *Ptr, uint64_t &Size, const DataLayout *DL,
+bool llvm::getObjectSize(const Value *Ptr, uint64_t &Size, const DataLayout &DL,
const TargetLibraryInfo *TLI, bool RoundToAlign) {
- if (!DL)
- return false;
-
ObjectSizeOffsetVisitor Visitor(DL, TLI, Ptr->getContext(), RoundToAlign);
SizeOffsetType Data = Visitor.compute(const_cast<Value*>(Ptr));
if (!Visitor.bothKnown(Data))
return Size;
}
-ObjectSizeOffsetVisitor::ObjectSizeOffsetVisitor(const DataLayout *DL,
+ObjectSizeOffsetVisitor::ObjectSizeOffsetVisitor(const DataLayout &DL,
const TargetLibraryInfo *TLI,
LLVMContext &Context,
bool RoundToAlign)
-: DL(DL), TLI(TLI), RoundToAlign(RoundToAlign) {
+ : DL(DL), TLI(TLI), RoundToAlign(RoundToAlign) {
// Pointer size must be rechecked for each object visited since it could have
// a different address space.
}
SizeOffsetType ObjectSizeOffsetVisitor::compute(Value *V) {
- IntTyBits = DL->getPointerTypeSizeInBits(V->getType());
+ IntTyBits = DL.getPointerTypeSizeInBits(V->getType());
Zero = APInt::getNullValue(IntTyBits);
V = V->stripPointerCasts();
if (Instruction *I = dyn_cast<Instruction>(V)) {
// If we have already seen this instruction, bail out. Cycles can happen in
// unreachable code after constant propagation.
- if (!SeenInsts.insert(I))
+ if (!SeenInsts.insert(I).second)
return unknown();
if (GEPOperator *GEP = dyn_cast<GEPOperator>(V))
if (!I.getAllocatedType()->isSized())
return unknown();
- APInt Size(IntTyBits, DL->getTypeAllocSize(I.getAllocatedType()));
+ APInt Size(IntTyBits, DL.getTypeAllocSize(I.getAllocatedType()));
if (!I.isArrayAllocation())
return std::make_pair(align(Size, I.getAlignment()), Zero);
return unknown();
}
PointerType *PT = cast<PointerType>(A.getType());
- APInt Size(IntTyBits, DL->getTypeAllocSize(PT->getElementType()));
+ APInt Size(IntTyBits, DL.getTypeAllocSize(PT->getElementType()));
return std::make_pair(align(Size, A.getParamAlignment()), Zero);
}
SizeOffsetType ObjectSizeOffsetVisitor::visitGEPOperator(GEPOperator &GEP) {
SizeOffsetType PtrData = compute(GEP.getPointerOperand());
APInt Offset(IntTyBits, 0);
- if (!bothKnown(PtrData) || !GEP.accumulateConstantOffset(*DL, Offset))
+ if (!bothKnown(PtrData) || !GEP.accumulateConstantOffset(DL, Offset))
return unknown();
return std::make_pair(PtrData.first, PtrData.second + Offset);
if (!GV.hasDefinitiveInitializer())
return unknown();
- APInt Size(IntTyBits, DL->getTypeAllocSize(GV.getType()->getElementType()));
+ APInt Size(IntTyBits, DL.getTypeAllocSize(GV.getType()->getElementType()));
return std::make_pair(align(Size, GV.getAlignment()), Zero);
}
return unknown();
}
-ObjectSizeOffsetEvaluator::ObjectSizeOffsetEvaluator(const DataLayout *DL,
- const TargetLibraryInfo *TLI,
- LLVMContext &Context,
- bool RoundToAlign)
-: DL(DL), TLI(TLI), Context(Context), Builder(Context, TargetFolder(DL)),
- RoundToAlign(RoundToAlign) {
+ObjectSizeOffsetEvaluator::ObjectSizeOffsetEvaluator(
+ const DataLayout &DL, const TargetLibraryInfo *TLI, LLVMContext &Context,
+ bool RoundToAlign)
+ : DL(DL), TLI(TLI), Context(Context), Builder(Context, TargetFolder(DL)),
+ RoundToAlign(RoundToAlign) {
// IntTy and Zero must be set for each compute() since the address space may
// be different for later objects.
}
SizeOffsetEvalType ObjectSizeOffsetEvaluator::compute(Value *V) {
// XXX - Are vectors of pointers possible here?
- IntTy = cast<IntegerType>(DL->getIntPtrType(V->getType()));
+ IntTy = cast<IntegerType>(DL.getIntPtrType(V->getType()));
Zero = ConstantInt::get(IntTy, 0);
SizeOffsetEvalType Result = compute_(V);
// Record the pointers that were handled in this run, so that they can be
// cleaned later if something fails. We also use this set to break cycles that
// can occur in dead code.
- if (!SeenVals.insert(V)) {
+ if (!SeenVals.insert(V).second) {
Result = unknown();
} else if (GEPOperator *GEP = dyn_cast<GEPOperator>(V)) {
Result = visitGEPOperator(*GEP);
assert(I.isArrayAllocation());
Value *ArraySize = I.getArraySize();
Value *Size = ConstantInt::get(ArraySize->getType(),
- DL->getTypeAllocSize(I.getAllocatedType()));
+ DL.getTypeAllocSize(I.getAllocatedType()));
Size = Builder.CreateMul(Size, ArraySize);
return std::make_pair(Size, Zero);
}
if (!bothKnown(PtrData))
return unknown();
- Value *Offset = EmitGEPOffset(&Builder, *DL, &GEP, /*NoAssumptions=*/true);
+ Value *Offset = EmitGEPOffset(&Builder, DL, &GEP, /*NoAssumptions=*/true);
Offset = Builder.CreateAdd(PtrData.second, Offset);
return std::make_pair(PtrData.first, Offset);
}
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