Add DIContext::getLineInfoForAddressRange() function and test.  This function allows a caller to obtain a table of line information for a function using the function's address and size.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173537 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/DebugInfo/DWARFDebugLine.h b/lib/DebugInfo/DWARFDebugLine.h
index dbaf91d..2990756 100644
--- a/lib/DebugInfo/DWARFDebugLine.h
+++ b/lib/DebugInfo/DWARFDebugLine.h
@@ -178,6 +178,10 @@
     // or -1 if there is no such row.
     uint32_t lookupAddress(uint64_t address) const;
 
+    bool lookupAddressRange(uint64_t address,
+                            uint64_t size, 
+                            std::vector<uint32_t>& result) const;
+
     // Extracts filename by its index in filename table in prologue.
     // Returns true on success.
     bool getFileNameByIndex(uint64_t FileIndex,