Scale invocation count by the number of BBs in the flow-graph of a method.

runtime/vm/flow_graph_compiler_arm.cc

Index: runtime/vm/flow_graph_compiler_arm.cc
diff --git a/runtime/vm/flow_graph_compiler_arm.cc b/runtime/vm/flow_graph_compiler_arm.cc
index 1bb28294528eff35bd122d7a013c7748ff16396a..1281c47bcf8365643cbaeb2f97187f2bce3b051d 100644
--- a/runtime/vm/flow_graph_compiler_arm.cc
+++ b/runtime/vm/flow_graph_compiler_arm.cc
@@ -25,8 +25,6 @@ namespace dart {
 DEFINE_FLAG(bool, trap_on_deoptimization, false, "Trap on deoptimization.");
 DEFINE_FLAG(bool, unbox_mints, true, "Optimize 64-bit integer arithmetic.");
 DEFINE_FLAG(bool, unbox_doubles, true, "Optimize double arithmetic.");
-DECLARE_FLAG(int, optimization_counter_threshold);
-DECLARE_FLAG(int, reoptimization_counter_threshold);
 DECLARE_FLAG(bool, enable_type_checks);
 DECLARE_FLAG(bool, enable_simd_inline);
 
@@ -979,13 +977,12 @@ void FlowGraphCompiler::EmitFrameEntry() {
     // Patch point is after the eventually inlined function object.
     entry_patch_pc_offset_ = assembler()->CodeSize();
 
-    intptr_t threshold = FLAG_optimization_counter_threshold;
+    const intptr_t threshold = GetOptimizationThreshold();;
     __ ldr(R7, FieldAddress(function_reg,
                             Function::usage_counter_offset()));
     if (is_optimizing()) {
       // Reoptimization of an optimized function is triggered by counting in
       // IC stubs, but not at the entry of the function.
-      threshold = FLAG_reoptimization_counter_threshold;
     } else {

[Vyacheslav Egorov (Google), 2014/08/29 11:17:18]

else -> if (!is_optimizing()) move comment above it.

[Anders Johnsen, 2014/08/29 11:56:28]

Done.

       __ add(R7, R7, Operand(1));
       __ str(R7, FieldAddress(function_reg,