1 files changed, 18 insertions, 2 deletions
diff --git a/compiler/optimizing/loop_optimization.h b/compiler/optimizing/loop_optimization.h
index b17861648f..0535c74e91 100644
--- a/compiler/optimizing/loop_optimization.h
+++ b/compiler/optimizing/loop_optimization.h
@@ -47,6 +47,11 @@ class HLoopOptimization : public HOptimization {
 
   static constexpr const char* kLoopOptimizationPassName = "loop_optimization";
 
+  // The maximum number of total instructions (trip_count * instruction_count),
+  // where the optimization of removing SuspendChecks from the loop header could
+  // be performed.
+  static constexpr int64_t kMaxTotalInstRemoveSuspendCheck = 128;
+
  private:
   /**
    * A single loop inside the loop hierarchy representation.
@@ -179,8 +184,19 @@ class HLoopOptimization : public HOptimization {
   // should be actually applied.
   bool TryFullUnrolling(LoopAnalysisInfo* analysis_info, bool generate_code = true);
 
-  // Tries to apply scalar loop peeling and unrolling.
-  bool TryPeelingAndUnrolling(LoopNode* node);
+  // Tries to remove SuspendCheck for plain loops with a low trip count. The
+  // SuspendCheck in the codegen makes sure that the thread can be interrupted
+  // during execution for GC. Not being able to do so might decrease the
+  // responsiveness of GC when a very long loop or a long recursion is being
+  // executed. However, for plain loops with a small trip count, the removal of
+  // SuspendCheck should not affect the GC's responsiveness by a large margin.
+  // Consequently, since the thread won't be interrupted for plain loops, it is
+  // assumed that the performance might increase by removing SuspendCheck.
+  bool TryToRemoveSuspendCheckFromLoopHeader(LoopAnalysisInfo* analysis_info,
+                                             bool generate_code = true);
+
+  // Tries to apply scalar loop optimizations.
+  bool TryLoopScalarOpts(LoopNode* node);
 
   //
   // Vectorization analysis and synthesis.