[DWARF parser] Refactor fetching DIE address ranges.

Add a helper method to get address ranges specified in a DIE
(either by DW_AT_low_pc/DW_AT_high_pc, or by DW_AT_ranges). Use it
to untangle and simplify the code.

No functionality change.

llvm-svn: 206624

1 files changed, 7 insertions, 8 deletions

diff --git a/llvm/lib/DebugInfo/DWARFDebugRangeList.h b/llvm/lib/DebugInfo/DWARFDebugRangeList.h
index 4e34a916f4a..587b550a668 100644
--- a/llvm/lib/DebugInfo/DWARFDebugRangeList.h
+++ b/llvm/lib/DebugInfo/DWARFDebugRangeList.h
@@ -17,6 +17,9 @@ namespace llvm {
 
 class raw_ostream;
 
+/// DWARFAddressRangesVector - represents a set of absolute address ranges.
+typedef std::vector<std::pair<uint64_t, uint64_t>> DWARFAddressRangesVector;
+
 class DWARFDebugRangeList {
 public:
   struct RangeListEntry {
@@ -50,10 +53,6 @@ public:
       else
         return StartAddress == -1ULL;
     }
-    bool containsAddress(uint64_t BaseAddress, uint64_t Address) const {
-      return (BaseAddress + StartAddress <= Address) &&
-             (Address < BaseAddress + EndAddress);
-    }
   };
 
 private:
@@ -67,10 +66,10 @@ public:
   void clear();
   void dump(raw_ostream &OS) const;
   bool extract(DataExtractor data, uint32_t *offset_ptr);
-  /// containsAddress - Returns true if range list contains the given
-  /// address. Has to be passed base address of the compile unit that
-  /// references this range list.
-  bool containsAddress(uint64_t BaseAddress, uint64_t Address) const;
+  /// getAbsoluteRanges - Returns absolute address ranges defined by this range
+  /// list. Has to be passed base address of the compile unit referencing this
+  /// range list.
+  DWARFAddressRangesVector getAbsoluteRanges(uint64_t BaseAddress) const;
 };
 
 }  // namespace llvm