llvm-dwarfdump: implement --find for .apple_names

This patch implements the dwarfdump option --find=<name>.  This option
looks for a DIE in the accelerator tables and dumps it if found.  This
initial patch only adds support for .apple_names to keep the review
small, adding the other sections and pubnames support should be
trivial though.

Differential Revision: https://reviews.llvm.org/D38282

llvm-svn: 314439

1 files changed, 1 insertions, 8 deletions

diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfAccelTable.h b/llvm/lib/CodeGen/AsmPrinter/DwarfAccelTable.h
index 92b3d50cd2f..f56199dc8e7 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfAccelTable.h
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfAccelTable.h
@@ -68,13 +68,6 @@ class AsmPrinter;
 class DwarfDebug;
 
 class DwarfAccelTable {
-  static uint32_t HashDJB(StringRef Str) {
-    uint32_t h = 5381;
-    for (unsigned i = 0, e = Str.size(); i != e; ++i)
-      h = ((h << 5) + h) + Str[i];
-    return h;
-  }
-
   // Helper function to compute the number of buckets needed based on
   // the number of unique hashes.
   void ComputeBucketCount();
@@ -199,7 +192,7 @@ private:
 
     HashData(StringRef S, DwarfAccelTable::DataArray &Data)
         : Str(S), Data(Data) {
-      HashValue = DwarfAccelTable::HashDJB(S);
+      HashValue = dwarf::djbHash(S);
     }
 
 #ifndef NDEBUG