Uniform and precise source positions for inlining

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index ef3f31df4793aefb3cdfbc7012a9c889589b8fb7..a7eda757d609b82553b88673ae6971b22bd17d2c 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -168,6 +168,8 @@
 namespace v8 {
 namespace internal {
 
+struct InliningPosition;
+
 enum KeyedAccessStoreMode {
   STANDARD_STORE,
   STORE_TRANSITION_TO_OBJECT,
@@ -4955,6 +4957,30 @@ class ByteArray: public FixedArrayBase {
   DISALLOW_IMPLICIT_CONSTRUCTORS(ByteArray);
 };
 
+// Wrapper class for ByteArray which can store arbitrary C++ classes, as long
+// as they can be copied with memcpy.
+template <class T>
+class PodArray : public ByteArray {
+ public:
+  void copy_out(int index, T* result) {
+    ByteArray::copy_out(index * sizeof(T), reinterpret_cast<byte*>(result),
+                        sizeof(T));
+  }
+  T get(int index) {
+    T result;
+    copy_out(index, &result);
+    return result;
+  }
+  void set(int index, const T& value) {
+    copy_in(index * sizeof(T), reinterpret_cast<const byte*>(&value),
+            sizeof(T));
+  }
+  int length() { return ByteArray::length() / sizeof(T); }
+  DECLARE_CAST(PodArray<T>);
+
+ private:
+  DISALLOW_IMPLICIT_CONSTRUCTORS(PodArray<T>);
+};
 
 // BytecodeArray represents a sequence of interpreter bytecodes.
 class BytecodeArray : public FixedArrayBase {
@@ -5187,7 +5213,6 @@ TYPED_ARRAYS(FIXED_TYPED_ARRAY_TRAITS)
 
 #undef FIXED_TYPED_ARRAY_TRAITS
 
-
 // DeoptimizationInputData is a fixed array used to hold the deoptimization
 // data for code generated by the Hydrogen/Lithium compiler.  It also
 // contains information about functions that were inlined.  If N different
@@ -5206,7 +5231,8 @@ class DeoptimizationInputData: public FixedArray {
   static const int kOptimizationIdIndex = 5;
   static const int kSharedFunctionInfoIndex = 6;
   static const int kWeakCellCacheIndex = 7;
-  static const int kFirstDeoptEntryIndex = 8;
+  static const int kInliningPositionsIndex = 8;
+  static const int kFirstDeoptEntryIndex = 9;
 
   // Offsets of deopt entry elements relative to the start of the entry.
   static const int kAstIdRawOffset = 0;
@@ -5228,6 +5254,7 @@ class DeoptimizationInputData: public FixedArray {
   DECLARE_ELEMENT_ACCESSORS(OptimizationId, Smi)
   DECLARE_ELEMENT_ACCESSORS(SharedFunctionInfo, Object)
   DECLARE_ELEMENT_ACCESSORS(WeakCellCache, Object)
+  DECLARE_ELEMENT_ACCESSORS(InliningPositions, PodArray<InliningPosition>)
 
 #undef DECLARE_ELEMENT_ACCESSORS
 
@@ -5269,7 +5296,6 @@ class DeoptimizationInputData: public FixedArray {
   static int LengthFor(int entry_count) { return IndexForEntry(entry_count); }
 };
 
-
 // DeoptimizationOutputData is a fixed array used to hold the deoptimization
 // data for code generated by the full compiler.
 // The format of the these objects is