[bpf] rename triple names bpf_be -> bpfeb

[oota-llvm.git] / lib / Support / Allocator.cpp

diff --git a/lib/Support/Allocator.cpp b/lib/Support/Allocator.cpp
index 0d0367a6f13e3a5102715cbd2bc4a622a7f87d96..f48edac0598ce13ece81ec075fbfbb9b0ca35a10 100644 (file)
--- a/lib/Support/Allocator.cpp
+++ b/lib/Support/Allocator.cpp
@@ -2,8 +2,8 @@
 //
 //                     The LLVM Compiler Infrastructure
 //
-// This file was developed by Chris Lattner and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
@@ -12,95 +12,29 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/Support/Allocator.h"
-#include <iostream>
-using namespace llvm;
+#include "llvm/Support/raw_ostream.h"
 
-//===----------------------------------------------------------------------===//
-// MemRegion class implementation
-//===----------------------------------------------------------------------===//
+namespace llvm {
 
-namespace {
-/// MemRegion - This is one chunk of the BumpPtrAllocator.
-class MemRegion {
-  unsigned RegionSize;
-  MemRegion *Next;
-  char *NextPtr;
-public:
-  void Init(unsigned size, unsigned Alignment, MemRegion *next) {
-    RegionSize = size;
-    Next = next;
-    NextPtr = (char*)(this+1);
-    
-    // Align NextPtr.
-    NextPtr = (char*)((intptr_t)(NextPtr+Alignment-1) &
-                      ~(intptr_t)(Alignment-1));
-  }
-  
-  const MemRegion *getNext() const { return Next; }
-  unsigned getNumBytesAllocated() const {
-    return NextPtr-(const char*)this;
-  }
-  
-  /// Allocate - Allocate and return at least the specified number of bytes.
-  ///
-  void *Allocate(unsigned AllocSize, unsigned Alignment, MemRegion **RegPtr) {
-    // Round size up to an even multiple of the alignment.
-    AllocSize = (AllocSize+Alignment-1) & ~(Alignment-1);
-    
-    // If there is space in this region, return it.
-    if (unsigned(NextPtr+AllocSize-(char*)this) <= RegionSize) {
-      void *Result = NextPtr;
-      NextPtr += AllocSize;
-      return Result;
-    }
-    
-    // Otherwise, we have to allocate a new chunk.  Create one twice as big as
-    // this one.
-    MemRegion *NewRegion = (MemRegion *)malloc(RegionSize*2);
-    NewRegion->Init(RegionSize*2, Alignment, this);
+namespace detail {
 
-    // Update the current "first region" pointer  to point to the new region.
-    *RegPtr = NewRegion;
-    
-    // Try allocating from it now.
-    return NewRegion->Allocate(AllocSize, Alignment, RegPtr);
-  }
-  
-  /// Deallocate - Release all memory for this region to the system.
-  ///
-  void Deallocate() {
-    MemRegion *next = Next;
-    free(this);
-    if (next)
-      next->Deallocate();
-  }
-};
+void printBumpPtrAllocatorStats(unsigned NumSlabs, size_t BytesAllocated,
+                                size_t TotalMemory) {
+  errs() << "\nNumber of memory regions: " << NumSlabs << '\n'
+         << "Bytes used: " << BytesAllocated << '\n'
+         << "Bytes allocated: " << TotalMemory << '\n'
+         << "Bytes wasted: " << (TotalMemory - BytesAllocated)
+         << " (includes alignment, etc)\n";
 }
 
-//===----------------------------------------------------------------------===//
-// BumpPtrAllocator class implementation
-//===----------------------------------------------------------------------===//
+} // End namespace detail.
 
-BumpPtrAllocator::BumpPtrAllocator() {
-  TheMemory = malloc(4096);
-  ((MemRegion*)TheMemory)->Init(4096, 1, 0);
+void PrintRecyclerStats(size_t Size,
+                        size_t Align,
+                        size_t FreeListSize) {
+  errs() << "Recycler element size: " << Size << '\n'
+         << "Recycler element alignment: " << Align << '\n'
+         << "Number of elements free for recycling: " << FreeListSize << '\n';
 }
 
-BumpPtrAllocator::~BumpPtrAllocator() {
-  ((MemRegion*)TheMemory)->Deallocate();
-}
-
-void *BumpPtrAllocator::Allocate(unsigned Size, unsigned Align) {
-  return ((MemRegion*)TheMemory)->Allocate(Size, Align,(MemRegion**)&TheMemory);
-}
-
-void BumpPtrAllocator::PrintStats() const {
-  unsigned BytesUsed = 0;
-  unsigned NumRegions = 0;
-  const MemRegion *R = (MemRegion*)TheMemory;
-  for (; R; R = R->getNext(), ++NumRegions)
-    BytesUsed += R->getNumBytesAllocated();
-
-  std::cerr << "\nNumber of memory regions: " << NumRegions << "\n";
-  std::cerr << "Bytes allocated: " << BytesUsed << "\n";
 }