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[cleanup] Hoist the initialization and constants for slab sizes to the

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top of the default jit memory manager. This will allow them to be used
as template parameters rather than runtime parameters in a subsequent
commit.

llvm-svn: 204992
This commit is contained in:
Chandler Carruth 2014-03-28 08:53:08 +00:00
parent 11a640aa93
commit 84b4a8962b
1 changed files with 17 additions and 20 deletions
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37
lib/ExecutionEngine/JIT/JITMemoryManager.cpp
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@ -285,7 +285,21 @@ namespace {
/// middle of emitting a function, and we don't know how large the function we
/// are emitting is.
class DefaultJITMemoryManager : public JITMemoryManager {
public:
/// DefaultCodeSlabSize - When we have to go map more memory, we allocate at
/// least this much unless more is requested. Currently, in 512k slabs.
static const size_t DefaultCodeSlabSize = 512 * 1024;
/// DefaultSlabSize - Allocate globals and stubs into slabs of 64K (probably
/// 16 pages) unless we get an allocation above SizeThreshold.
static const size_t DefaultSlabSize = 64 * 1024;
/// DefaultSizeThreshold - For any allocation larger than 16K (probably
/// 4 pages), we should allocate a separate slab to avoid wasted space at
/// the end of a normal slab.
static const size_t DefaultSizeThreshold = 16 * 1024;
private:
// Whether to poison freed memory.
bool PoisonMemory;
@ -318,18 +332,6 @@ namespace {
/// last slab it allocated, so that subsequent allocations follow it.
sys::MemoryBlock allocateNewSlab(size_t size);
/// DefaultCodeSlabSize - When we have to go map more memory, we allocate at
/// least this much unless more is requested.
static const size_t DefaultCodeSlabSize;
/// DefaultSlabSize - Allocate data into slabs of this size unless we get
/// an allocation above SizeThreshold.
static const size_t DefaultSlabSize;
/// DefaultSizeThreshold - For any allocation larger than this threshold, we
/// should allocate a separate slab.
static const size_t DefaultSizeThreshold;
/// getPointerToNamedFunction - This method returns the address of the
/// specified function by using the dlsym function call.
void *getPointerToNamedFunction(const std::string &Name,
@ -902,11 +904,6 @@ JITMemoryManager *JITMemoryManager::CreateDefaultMemManager() {
return new DefaultJITMemoryManager();
}
// Allocate memory for code in 512K slabs.
const size_t DefaultJITMemoryManager::DefaultCodeSlabSize = 512 * 1024;
// Allocate globals and stubs in slabs of 64K. (probably 16 pages)
const size_t DefaultJITMemoryManager::DefaultSlabSize = 64 * 1024;
// Waste at most 16K at the end of each bump slab. (probably 4 pages)
const size_t DefaultJITMemoryManager::DefaultSizeThreshold = 16 * 1024;
const size_t DefaultJITMemoryManager::DefaultCodeSlabSize;
const size_t DefaultJITMemoryManager::DefaultSlabSize;
const size_t DefaultJITMemoryManager::DefaultSizeThreshold;