1 //===- llvm/ADT/SmallVector.cpp - 'Normally small' vectors ----------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file implements the SmallVector class. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #include "llvm/ADT/SmallVector.h" 15 using namespace llvm; 16 17 /// grow_pod - This is an implementation of the grow() method which only works 18 /// on POD-like datatypes and is out of line to reduce code duplication. 19 void SmallVectorBase::grow_pod(size_t MinSizeInBytes, size_t TSize) { 20 size_t CurSizeBytes = size_in_bytes(); 21 size_t NewCapacityInBytes = 2 * capacity_in_bytes() + TSize; // Always grow. 22 if (NewCapacityInBytes < MinSizeInBytes) 23 NewCapacityInBytes = MinSizeInBytes; 24 25 void *NewElts; 26 if (this->isSmall()) { 27 NewElts = malloc(NewCapacityInBytes); 28 29 // Copy the elements over. No need to run dtors on PODs. 30 memcpy(NewElts, this->BeginX, CurSizeBytes); 31 } else { 32 // If this wasn't grown from the inline copy, grow the allocated space. 33 NewElts = realloc(this->BeginX, NewCapacityInBytes); 34 } 35 36 this->EndX = (char*)NewElts+CurSizeBytes; 37 this->BeginX = NewElts; 38 this->CapacityX = (char*)this->BeginX + NewCapacityInBytes; 39 } 40 41
