Uniform and precise source positions for inlining

src/deoptimizer.cc

Index: src/deoptimizer.cc
diff --git a/src/deoptimizer.cc b/src/deoptimizer.cc
index 6fe51bb3aff48ead9cde4b6b4139bf093a5c468c..a0ec810a3a1151e936d4636db165f40906eed724 100644
--- a/src/deoptimizer.cc
+++ b/src/deoptimizer.cc
@@ -2730,8 +2730,12 @@ Deoptimizer::DeoptInfo Deoptimizer::GetDeoptInfo(Code* code, Address pc) {
     }
     if (info->rmode() == RelocInfo::DEOPT_POSITION) {
       int raw_position = static_cast<int>(info->data());
-      last_position = raw_position ? SourcePosition::FromRaw(raw_position)
-                                   : SourcePosition::Unknown();
+      if (raw_position > 0) {
+        last_position.SetScriptOffset(raw_position - 2);
+      } else {
+        DCHECK(raw_position < 0);
+        last_position.SetInliningId(-raw_position - 2);
+      }
     } else if (info->rmode() == RelocInfo::DEOPT_ID) {
       last_deopt_id = static_cast<int>(info->data());
     } else if (info->rmode() == RelocInfo::DEOPT_REASON) {