Deduplicate stack masks
The stack masks repeat often enough so that it is worth deduplicating
them.
Oat size for a large app:
98143600 -> 96722288 (-1.44%)
Bug: 34621054
Test: test-art-host
Change-Id: If73d51e46066357049d5be2e406ae9a32b7ff1f4
diff --git a/compiler/optimizing/stack_map_stream.h b/compiler/optimizing/stack_map_stream.h
index 8fec472..e2e16e8 100644
--- a/compiler/optimizing/stack_map_stream.h
+++ b/compiler/optimizing/stack_map_stream.h
@@ -68,6 +68,7 @@
location_catalog_entries_indices_(allocator->Adapter(kArenaAllocStackMapStream)),
dex_register_locations_(allocator->Adapter(kArenaAllocStackMapStream)),
inline_infos_(allocator->Adapter(kArenaAllocStackMapStream)),
+ stack_masks_(allocator->Adapter(kArenaAllocStackMapStream)),
stack_mask_max_(-1),
dex_pc_max_(0),
register_mask_max_(0),
@@ -107,6 +108,7 @@
BitVector* live_dex_registers_mask;
uint32_t dex_register_map_hash;
size_t same_dex_register_map_as_;
+ uint32_t stack_mask_index;
};
struct InlineInfoEntry {
@@ -160,6 +162,9 @@
CodeOffset ComputeMaxNativePcCodeOffset() const;
+ // Returns the number of unique stack masks.
+ size_t PrepareStackMasks(size_t entry_size_in_bits);
+
// Returns the index of an entry with the same dex register map as the current_entry,
// or kNoSameDexMapFound if no such entry exists.
size_t FindEntryWithTheSameDexMap();
@@ -193,6 +198,7 @@
// A set of concatenated maps of Dex register locations indices to `location_catalog_entries_`.
ArenaVector<size_t> dex_register_locations_;
ArenaVector<InlineInfoEntry> inline_infos_;
+ ArenaVector<uint8_t> stack_masks_;
int stack_mask_max_;
uint32_t dex_pc_max_;
uint32_t register_mask_max_;