From d4229601e0fb46b0a013b52370aeda3887aea8e9 Mon Sep 17 00:00:00 2001 From: Santiago Aboy Solanes Date: Tue, 3 Jan 2023 16:20:50 +0000 Subject: Add a write barrier elimination pass We can eliminate redundant write barriers as we don't need several for the same receiver. For example: ``` MyObject o; o.inner_obj = io; o.inner_obj2 = io2; o.inner_obj3 = io3; ``` We can keep the write barrier for `inner_obj` and remove the other two. Note that we cannot perform this optimization across invokes, suspend check, or instructions that can throw. Local improvements (pixel 5, speed compile): * System server: -280KB (-0.56%) * SystemUIGoogle: -330KB (-1.16%) * AGSA: -3876KB (-1.19%) Bug: 260843353 Fixes: 260843353 Change-Id: Ibf98efbe891ee00e46125853c3e97ae30aa3ff30 --- compiler/optimizing/optimizing_compiler_stats.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'compiler/optimizing/optimizing_compiler_stats.h') diff --git a/compiler/optimizing/optimizing_compiler_stats.h b/compiler/optimizing/optimizing_compiler_stats.h index 100441aaff..698a1471c3 100644 --- a/compiler/optimizing/optimizing_compiler_stats.h +++ b/compiler/optimizing/optimizing_compiler_stats.h @@ -118,6 +118,8 @@ enum class MethodCompilationStat { kConstructorFenceRemovedLSE, kConstructorFenceRemovedPFRA, kConstructorFenceRemovedCFRE, + kPossibleWriteBarrier, + kRemovedWriteBarrier, kBitstringTypeCheck, kJitOutOfMemoryForCommit, kFullLSEAllocationRemoved, -- cgit v1.2.3-59-g8ed1b