Don't hide the first ELF symbol.

The first symbol on ELF is dummy, but it has a defined content and readelf
normally displays it. With this change llvm-readobj also displays it and we
can check that llvm-mc output is correct according to the standard.

llvm-svn: 183337
diff --git a/llvm/include/llvm/Object/ELF.h b/llvm/include/llvm/Object/ELF.h
index a1a3d59..2c66941 100644
--- a/llvm/include/llvm/Object/ELF.h
+++ b/llvm/include/llvm/Object/ELF.h
@@ -2466,7 +2466,7 @@
     SymbolData.d.a = 0;
     SymbolData.d.b = 0;
   } else {
-    SymbolData.d.a = 1; // The 0th symbol in ELF is fake.
+    SymbolData.d.a = 0;
     SymbolData.d.b = SymbolTableIndex;
   }
   return symbol_iterator(SymbolRef(SymbolData, this));
@@ -2493,7 +2493,7 @@
     SymbolData.d.a = 0;
     SymbolData.d.b = 0;
   } else {
-    SymbolData.d.a = 1; // The 0th symbol in ELF is fake.
+    SymbolData.d.a = 0;
     SymbolData.d.b = DynamicSymbolTableIndex;
   }
   return symbol_iterator(SymbolRef(SymbolData, this));
diff --git a/llvm/test/MC/ELF/alias-reloc.s b/llvm/test/MC/ELF/alias-reloc.s
index f5448e5..0ee73e9 100644
--- a/llvm/test/MC/ELF/alias-reloc.s
+++ b/llvm/test/MC/ELF/alias-reloc.s
@@ -25,7 +25,16 @@
 // CHECK-NEXT: ]
 
 // CHECK:      Symbols [
-// CHECK:        Symbol {
+// CHECK-NEXT:   Symbol {
+// CHECK-NEXT:     Name:  (0)
+// CHECK-NEXT:     Value: 0x0
+// CHECK-NEXT:     Size: 0
+// CHECK-NEXT:     Binding: Local (0x0)
+// CHECK-NEXT:     Type: None (0x0)
+// CHECK-NEXT:     Other: 0
+// CHECK-NEXT:     Section:  (0x0)
+// CHECK-NEXT:   }
+// CHECK-NEXT:   Symbol {
 // CHECK-NEXT:     Name: bar
 // CHECK-NEXT:     Value: 0x0
 // CHECK-NEXT:     Size: 0
diff --git a/llvm/test/MC/ELF/alias.s b/llvm/test/MC/ELF/alias.s
index 0575f41..8da75f7 100644
--- a/llvm/test/MC/ELF/alias.s
+++ b/llvm/test/MC/ELF/alias.s
@@ -19,6 +19,15 @@
 
 // CHECK:      Symbols [
 // CHECK-NEXT:   Symbol {
+// CHECK-NEXT:     Name:  (0)
+// CHECK-NEXT:     Value: 0x0
+// CHECK-NEXT:     Size: 0
+// CHECK-NEXT:     Binding: Local (0x0)
+// CHECK-NEXT:     Type: None (0x0)
+// CHECK-NEXT:     Other: 0
+// CHECK-NEXT:     Section:  (0x0)
+// CHECK-NEXT:   }
+// CHECK-NEXT:   Symbol {
 // CHECK-NEXT:     Name: bar
 // CHECK-NEXT:     Value: 0x0
 // CHECK-NEXT:     Size: 0
diff --git a/llvm/test/MC/ELF/weakref.s b/llvm/test/MC/ELF/weakref.s
index 8717364..6c2d333 100644
--- a/llvm/test/MC/ELF/weakref.s
+++ b/llvm/test/MC/ELF/weakref.s
@@ -71,6 +71,15 @@
 
 // CHECK:      Symbols [
 // CHECK-NEXT:   Symbol {
+// CHECK-NEXT:     Name:  (0)
+// CHECK-NEXT:     Value: 0x0
+// CHECK-NEXT:     Size: 0
+// CHECK-NEXT:     Binding: Local (0x0)
+// CHECK-NEXT:     Type: None (0x0)
+// CHECK-NEXT:     Other: 0
+// CHECK-NEXT:     Section:  (0x0)
+// CHECK-NEXT:   }
+// CHECK-NEXT:   Symbol {
 // CHECK-NEXT:     Name: bar6 (21)
 // CHECK-NEXT:     Value: 0x18
 // CHECK-NEXT:     Size: 0
diff --git a/llvm/test/tools/llvm-readobj/symbols.test b/llvm/test/tools/llvm-readobj/symbols.test
index d33bd8e..e014377 100644
--- a/llvm/test/tools/llvm-readobj/symbols.test
+++ b/llvm/test/tools/llvm-readobj/symbols.test
@@ -25,6 +25,15 @@
 
 ELF:      Symbols [
 ELF-NEXT:   Symbol {
+ELF-NEXT:     Name:  (0)
+ELF-NEXT:     Value: 0x0
+ELF-NEXT:     Size: 0
+ELF-NEXT:     Binding: Local (0x0)
+ELF-NEXT:     Type: None (0x0)
+ELF-NEXT:     Other: 0
+ELF-NEXT:     Section:  (0x0)
+ELF-NEXT:   }
+ELF-NEXT:   Symbol {
 ELF-NEXT:     Name: trivial.ll (1)
 ELF-NEXT:     Value: 0x0
 ELF-NEXT:     Size: 0