[BumpPtrAllocator] Move DefaultSlabAllocator to a member of BumpPtrAllocator, instead of a static variable.

The problem with having DefaultSlabAllocator being a global static is that it is undefined if BumpPtrAllocator
will be usable during global initialization because it is not guaranteed that DefaultSlabAllocator will be
initialized before BumpPtrAllocator is created and used.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189433 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 4 insertions, 3 deletions

diff --git a/lib/Support/Allocator.cpp b/lib/Support/Allocator.cpp
index 3c4191b805..6e7a541dd4 100644
--- a/lib/Support/Allocator.cpp
+++ b/lib/Support/Allocator.cpp
@@ -26,6 +26,10 @@ BumpPtrAllocator::BumpPtrAllocator(size_t size, size_t threshold,
     : SlabSize(size), SizeThreshold(std::min(size, threshold)),
       Allocator(allocator), CurSlab(0), BytesAllocated(0) { }
 
+BumpPtrAllocator::BumpPtrAllocator(size_t size, size_t threshold)
+    : SlabSize(size), SizeThreshold(std::min(size, threshold)),
+      Allocator(DefaultSlabAllocator), CurSlab(0), BytesAllocated(0) { }
+
 BumpPtrAllocator::~BumpPtrAllocator() {
   DeallocateSlabs(CurSlab);
 }
@@ -167,9 +171,6 @@ void BumpPtrAllocator::PrintStats() const {
          << " (includes alignment, etc)\n";
 }
 
-MallocSlabAllocator BumpPtrAllocator::DefaultSlabAllocator =
-  MallocSlabAllocator();
-
 SlabAllocator::~SlabAllocator() { }
 
 MallocSlabAllocator::~MallocSlabAllocator() { }