DirectXShaderCompiler/lib/Support/SmallVector.cpp at main · microsoft/DirectXShaderCompiler · GitHub

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//===- llvm/ADT/SmallVector.cpp - 'Normally small' vectors ----------------===//

// The LLVM Compiler Infrastructure

// This file is distributed under the University of Illinois Open Source

// License. See LICENSE.TXT for details.

//===----------------------------------------------------------------------===//

// This file implements the SmallVector class.

//===----------------------------------------------------------------------===//

#include "llvm/ADT/SmallVector.h"

using namespace llvm;

/// grow_pod - This is an implementation of the grow() method which only works

/// on POD-like datatypes and is out of line to reduce code duplication.

void SmallVectorBase::grow_pod(void *FirstEl, size_t MinSizeInBytes,

size_t TSize) {

size_t CurSizeBytes = size_in_bytes();

size_t NewCapacityInBytes = 2 * capacity_in_bytes() + TSize; // Always grow.

if (NewCapacityInBytes < MinSizeInBytes)

NewCapacityInBytes = MinSizeInBytes;

// HLSL Change Begin - Use overridable operator new.

void *NewElts = new char[NewCapacityInBytes];

if (CurSizeBytes > 0)

memcpy(NewElts, this->BeginX, CurSizeBytes);

if (BeginX != nullptr && BeginX != FirstEl)

delete[] (char*)this->BeginX;

assert(NewElts && "Out of memory");

// HLSL Change End - Use overridable operator new.

this->EndX = (char*)NewElts+CurSizeBytes;

this->BeginX = NewElts;

this->CapacityX = (char*)this->BeginX + NewCapacityInBytes;

}

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