Create a scoped arena allocator and use that for LVN.

This saves more than 0.5s of boot.oat compilation time
on Nexus 5.

TODO: Move other stuff to the scoped allocator. This CL
alone increases the peak memory allocation. By reusing
the memory for other parts of the compilation we should
reduce this overhead.

Change-Id: Ifbc00aab4f3afd0000da818dfe68b96713824a08

1 files changed, 2 insertions, 2 deletions

diff --git a/compiler/dex/quick/codegen_util.cc b/compiler/dex/quick/codegen_util.cc
index 14469b61c3..34d3834682 100644
--- a/compiler/dex/quick/codegen_util.cc
+++ b/compiler/dex/quick/codegen_util.cc
@@ -358,7 +358,7 @@ LIR* Mir2Lir::ScanLiteralPoolWide(LIR* data_target, int val_lo, int val_hi) {
 LIR* Mir2Lir::AddWordData(LIR* *constant_list_p, int value) {
   /* Add the constant to the literal pool */
   if (constant_list_p) {
-    LIR* new_value = static_cast<LIR*>(arena_->Alloc(sizeof(LIR), ArenaAllocator::kAllocData));
+    LIR* new_value = static_cast<LIR*>(arena_->Alloc(sizeof(LIR), kArenaAllocData));
     new_value->operands[0] = value;
     new_value->next = *constant_list_p;
     *constant_list_p = new_value;
@@ -829,7 +829,7 @@ LIR* Mir2Lir::InsertCaseLabel(DexOffset vaddr, int keyVal) {
   LIR* res = boundary_lir;
   if (cu_->verbose) {
     // Only pay the expense if we're pretty-printing.
-    LIR* new_label = static_cast<LIR*>(arena_->Alloc(sizeof(LIR), ArenaAllocator::kAllocLIR));
+    LIR* new_label = static_cast<LIR*>(arena_->Alloc(sizeof(LIR), kArenaAllocLIR));
     new_label->dalvik_offset = vaddr;
     new_label->opcode = kPseudoCaseLabel;
     new_label->operands[0] = keyVal;