Improve code sinking near "always throwing" method calls

Rationale:
With simple dex bytecode analysis, the inliner marks methods
that always throw to help subsequent code sinking. This reduces
overhead of non-nullable enforcing calls found in e.g the Kotlin
runtime library (1%-2% improvement on tree microbenchmark, about
5% on Denis' benchmark).

Test: test-art-host test-art-target

Change-Id: I45348f049721476828eb5443738021720d2857c0

1 files changed, 1 insertions, 0 deletions

diff --git a/compiler/optimizing/dead_code_elimination.h b/compiler/optimizing/dead_code_elimination.h
index 84fd890eee..92a7f562e1 100644
--- a/compiler/optimizing/dead_code_elimination.h
+++ b/compiler/optimizing/dead_code_elimination.h
@@ -40,6 +40,7 @@ class HDeadCodeElimination : public HOptimization {
   void MaybeRecordSimplifyIf();
   bool RemoveDeadBlocks();
   void RemoveDeadInstructions();
+  bool SimplifyAlwaysThrows();
   bool SimplifyIfs();
   void ConnectSuccessiveBlocks();