[turbofan] Collect invocation counts and compute relative call frequencies.

src/full-codegen/ia32/full-codegen-ia32.cc

Index: src/full-codegen/ia32/full-codegen-ia32.cc
diff --git a/src/full-codegen/ia32/full-codegen-ia32.cc b/src/full-codegen/ia32/full-codegen-ia32.cc
index 5bb2f9fa0de9e1c47c00a7daf2102442bc6e2a0e..105d99c1c31f026fe4adfce2bc27efb158af76ed 100644
--- a/src/full-codegen/ia32/full-codegen-ia32.cc
+++ b/src/full-codegen/ia32/full-codegen-ia32.cc
@@ -117,6 +117,17 @@ void FullCodeGenerator::Generate() {
   info->set_prologue_offset(masm_->pc_offset());
   __ Prologue(info->GeneratePreagedPrologue());
 
+  // Increment invocation count for the function.
+  {
+    Comment cmnt(masm_, "[ Increment invocation count");
+    __ mov(ecx, FieldOperand(edi, JSFunction::kLiteralsOffset));
+    __ mov(ecx, FieldOperand(ecx, LiteralsArray::kFeedbackVectorOffset));
+    __ add(FieldOperand(
+               ecx, TypeFeedbackVector::kInvocationCountIndex * kPointerSize +
+                        TypeFeedbackVector::kHeaderSize),
+           Immediate(Smi::FromInt(1)));
+  }
+
   { Comment cmnt(masm_, "[ Allocate locals");
     int locals_count = info->scope()->num_stack_slots();
     // Generators allocate locals, if any, in context slots.