Experimental parser: merge to r19637

src/a64/instrument-a64.h

Index: src/a64/instrument-a64.h
diff --git a/src/hydrogen-mark-deoptimize.h b/src/a64/instrument-a64.h
similarity index 51%
copy from src/hydrogen-mark-deoptimize.h
copy to src/a64/instrument-a64.h
index 30f35b3dec59046c0893e55981b064fe15c37726..08dc1b2ad17308ccb5cbd4ff8042ead090c06746 100644
--- a/src/hydrogen-mark-deoptimize.h
+++ b/src/a64/instrument-a64.h
@@ -25,51 +25,84 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-#ifndef V8_HYDROGEN_MARK_DEOPTIMIZE_H_
-#define V8_HYDROGEN_MARK_DEOPTIMIZE_H_
+#ifndef V8_A64_INSTRUMENT_A64_H_
+#define V8_A64_INSTRUMENT_A64_H_
 
-#include "hydrogen.h"
+#include "globals.h"
+#include "utils.h"
+#include "a64/decoder-a64.h"
+#include "a64/constants-a64.h"
+#include "a64/instrument-a64.h"
 
 namespace v8 {
 namespace internal {
 
+const int kCounterNameMaxLength = 256;
+const uint64_t kDefaultInstrumentationSamplingPeriod = 1 << 22;
 
-// Compute DeoptimizeOnUndefined flag for phis.  Any phi that can reach a use
-// with DeoptimizeOnUndefined set must have DeoptimizeOnUndefined set.
-// Currently only HCompareNumericAndBranch, with double input representation,
-// has this flag set.  The flag is used by HChange tagged->double, which must
-// deoptimize if one of its uses has this flag set.
-class HMarkDeoptimizeOnUndefinedPhase : public HPhase {
- public:
-  explicit HMarkDeoptimizeOnUndefinedPhase(HGraph* graph)
-      : HPhase("H_Mark deoptimize on undefined", graph),
-        worklist_(16, zone()) {}
-
-  void Run();
 
- private:
-  void ProcessPhi(HPhi* phi);
+enum InstrumentState {
+  InstrumentStateDisable = 0,
+  InstrumentStateEnable = 1
+};
 
-  // Preallocated worklist used as an optimization so we don't have
-  // to allocate a new ZoneList for every ProcessPhi() invocation.
-  ZoneList<HPhi*> worklist_;
 
-  DISALLOW_COPY_AND_ASSIGN(HMarkDeoptimizeOnUndefinedPhase);
+enum CounterType {
+  Gauge = 0,      // Gauge counters reset themselves after reading.
+  Cumulative = 1  // Cumulative counters keep their value after reading.
 };
 
 
-class HComputeChangeUndefinedToNaN : public HPhase {
+class Counter {
  public:
-  explicit HComputeChangeUndefinedToNaN(HGraph* graph)
-      : HPhase("H_Compute change undefined to nan", graph) {}
+  Counter(const char* name, CounterType type = Gauge);
 
-  void Run();
+  void Increment();
+  void Enable();
+  void Disable();
+  bool IsEnabled();
+  uint64_t count();
+  const char* name();
+  CounterType type();
 
  private:
-  DISALLOW_COPY_AND_ASSIGN(HComputeChangeUndefinedToNaN);
+  char name_[kCounterNameMaxLength];
+  uint64_t count_;
+  bool enabled_;
+  CounterType type_;
 };
 
 
+class Instrument: public DecoderVisitor {
+ public:
+  explicit Instrument(const char* datafile = NULL,
+    uint64_t sample_period = kDefaultInstrumentationSamplingPeriod);
+  ~Instrument();
+
+  // Declare all Visitor functions.
+  #define DECLARE(A) void Visit##A(Instruction* instr);
+  VISITOR_LIST(DECLARE)
+  #undef DECLARE
+
+ private:
+  void Update();
+  void Enable();
+  void Disable();
+  void DumpCounters();
+  void DumpCounterNames();
+  void DumpEventMarker(unsigned marker);
+  void HandleInstrumentationEvent(unsigned event);
+  Counter* GetCounter(const char* name);
+
+  void InstrumentLoadStore(Instruction* instr);
+  void InstrumentLoadStorePair(Instruction* instr);
+
+  std::list<Counter*> counters_;
+
+  FILE *output_stream_;
+  uint64_t sample_period_;
+};
+
 } }  // namespace v8::internal
 
-#endif  // V8_HYDROGEN_MARK_DEOPTIMIZE_H_
+#endif  // V8_A64_INSTRUMENT_A64_H_