Only compile optimized if it is useful.

If profiling doesn't benefit the method, switch a baseline compilation
into optimized.

Reduces the number of JIT compilations on the Sheets benchmark from
~3100 (2250 baseline, 850 optimized) to ~2750 (2250 baseline, 500
optimized).

Test: test.py
Change-Id: I94760481d130d2dc168152daa94429baf201f66e

1 files changed, 7 insertions, 0 deletions

diff --git a/compiler/optimizing/profiling_info_builder.cc b/compiler/optimizing/profiling_info_builder.cc
index 19795f5466..f6cf676813 100644
--- a/compiler/optimizing/profiling_info_builder.cc
+++ b/compiler/optimizing/profiling_info_builder.cc
@@ -28,6 +28,7 @@
 namespace art HIDDEN {
 
 void ProfilingInfoBuilder::Run() {
+  DCHECK(GetGraph()->IsUsefulOptimizing());
   DCHECK_EQ(GetGraph()->GetProfilingInfo(), nullptr);
   // Order does not matter.
   for (HBasicBlock* block : GetGraph()->GetReversePostOrder()) {
@@ -122,6 +123,12 @@ bool ProfilingInfoBuilder::IsInlineCacheUseful(HInvoke* invoke, CodeGenerator* c
       return false;
     }
   }
+
+  if (!codegen->GetGraph()->IsUsefulOptimizing()) {
+    // Earlier pass knew what the calling target was. No need for an inline
+    // cache.
+    return false;
+  }
   return true;
 }