commit 1cf95287364948689f6a1a320567acd7728e94a3
author Nicolas Geoffray <ngeoffray@google.com> Fri Dec 12 19:22:03 2014 +0000
committer Nicolas Geoffray <ngeoffray@google.com> Thu Jan 29 10:52:14 2015 +0000
tree 70a8b60c768894d635cf63b0a480baa5073d2bed
parent 4a50662eeaa0b1a26be66e7584fb765151dabc59

Small optimization for recursive calls: avoid dex cache.

Change-Id: I044757a2f06e535cdc1480c4fc8182b89635baf6

compiler/optimizing/code_generator_x86_64.cc

diff --git a/compiler/optimizing/code_generator_x86_64.cc b/compiler/optimizing/code_generator_x86_64.cc
index 6bc28ff..90b7bda 100644
--- a/compiler/optimizing/code_generator_x86_64.cc
+++ b/compiler/optimizing/code_generator_x86_64.cc
@@ -361,13 +361,17 @@
 
   // temp = method;
   LoadCurrentMethod(temp);
-  // temp = temp->dex_cache_resolved_methods_;
-  __ movl(temp, Address(temp, mirror::ArtMethod::DexCacheResolvedMethodsOffset().SizeValue()));
-  // temp = temp[index_in_cache]
-  __ movl(temp, Address(temp, CodeGenerator::GetCacheOffset(invoke->GetDexMethodIndex())));
-  // (temp + offset_of_quick_compiled_code)()
-  __ call(Address(temp, mirror::ArtMethod::EntryPointFromQuickCompiledCodeOffset(
-      kX86_64WordSize).SizeValue()));
+  if (!invoke->IsRecursive()) {
+    // temp = temp->dex_cache_resolved_methods_;
+    __ movl(temp, Address(temp, mirror::ArtMethod::DexCacheResolvedMethodsOffset().SizeValue()));
+    // temp = temp[index_in_cache]
+    __ movl(temp, Address(temp, CodeGenerator::GetCacheOffset(invoke->GetDexMethodIndex())));
+    // (temp + offset_of_quick_compiled_code)()
+    __ call(Address(temp, mirror::ArtMethod::EntryPointFromQuickCompiledCodeOffset(
+        kX86_64WordSize).SizeValue()));
+  } else {
+    __ call(&frame_entry_label_);
+  }
 
   DCHECK(!IsLeafMethod());
   RecordPcInfo(invoke, invoke->GetDexPc());
@@ -472,6 +476,7 @@
 }
 
 void CodeGeneratorX86_64::GenerateFrameEntry() {
+  __ Bind(&frame_entry_label_);
   bool skip_overflow_check = IsLeafMethod()
       && !FrameNeedsStackCheck(GetFrameSize(), InstructionSet::kX86_64);
   DCHECK(GetCompilerOptions().GetImplicitStackOverflowChecks());