ART: Emit runtime read barrier checks only in slow-debug

Move runtime read barrier check emission to slow-debug to have
better control over when this instrumentation is done.

Bug: 35644369
Bug: 68025088
Test: m test-art-host
Test: manual inspection of core image code
Change-Id: I69b3b6f243c30813a741fe9e0a460f1543c6bc5d
diff --git a/compiler/optimizing/optimizing_cfi_test.cc b/compiler/optimizing/optimizing_cfi_test.cc
index 4ad2996..e2b2106 100644
--- a/compiler/optimizing/optimizing_cfi_test.cc
+++ b/compiler/optimizing/optimizing_cfi_test.cc
@@ -18,6 +18,7 @@
 #include <vector>
 
 #include "arch/instruction_set.h"
+#include "base/runtime_debug.h"
 #include "cfi_test.h"
 #include "driver/compiler_options.h"
 #include "gtest/gtest.h"
@@ -56,6 +57,9 @@
   ArenaAllocator* GetAllocator() { return pool_and_allocator_.GetAllocator(); }
 
   void SetUpFrame(InstructionSet isa) {
+    // Ensure that slow-debug is off, so that there is no unexpected read-barrier check emitted.
+    SetRuntimeDebugFlagsEnabled(false);
+
     // Setup simple context.
     std::string error;
     isa_features_ = InstructionSetFeatures::FromVariant(isa, "default", &error);