Revert "Revert "Support class unloading in dex2oat for quicken multidex""

Bug: 63467744
Test: test-art-host

This reverts commit 6921d90a241f0307ac25120f8f976744d4a57706.

Change-Id: If70e31d3a15579dc75fd40bfef186e0124568c87

1 files changed, 14 insertions, 0 deletions

diff --git a/compiler/dex/quick_compiler_callbacks.cc b/compiler/dex/quick_compiler_callbacks.cc
index 872f7ea15d..c7e9f4fc07 100644
--- a/compiler/dex/quick_compiler_callbacks.cc
+++ b/compiler/dex/quick_compiler_callbacks.cc
@@ -16,6 +16,7 @@
 
 #include "quick_compiler_callbacks.h"
 
+#include "driver/compiler_driver.h"
 #include "verification_results.h"
 #include "verifier/method_verifier-inl.h"
 
@@ -33,4 +34,17 @@ void QuickCompilerCallbacks::ClassRejected(ClassReference ref) {
   }
 }
 
+bool QuickCompilerCallbacks::CanAssumeVerified(ClassReference ref) {
+  // If we don't have class unloading enabled in the compiler, we will never see class that were
+  // previously verified. Return false to avoid overhead from the lookup in the compiler driver.
+  if (!does_class_unloading_) {
+    return false;
+  }
+  DCHECK(compiler_driver_ != nullptr);
+  // In the case of the quicken filter: avoiding verification of quickened instructions, which the
+  // verifier doesn't currently support.
+  // In the case of the verify filter, avoiding verifiying twice.
+  return compiler_driver_->CanAssumeVerified(ref);
+}
+
 }  // namespace art