Revert "DI: Fold constant arguments into a single MDString"

This reverts commit r218914 while I investigate some bots.

llvm-svn: 218918
diff --git a/llvm/test/DebugInfo/array.ll b/llvm/test/DebugInfo/array.ll
index 2c7195b..9a59524 100644
--- a/llvm/test/DebugInfo/array.ll
+++ b/llvm/test/DebugInfo/array.ll
@@ -6,7 +6,7 @@
   %retval = alloca i32, align 4
   %a = alloca [0 x i32], align 4
   store i32 0, i32* %retval
-  call void @llvm.dbg.declare(metadata !{[0 x i32]* %a}, metadata !6, metadata !{metadata !"0x102"}), !dbg !11
+  call void @llvm.dbg.declare(metadata !{[0 x i32]* %a}, metadata !6, metadata !{i32 786690}), !dbg !11
   ret i32 0, !dbg !12
 }
 
@@ -15,25 +15,25 @@
 !llvm.dbg.cu = !{!2}
 !llvm.module.flags = !{!16}
 
-!0 = metadata !{metadata !"0x2e\00main\00main\00\003\000\001\000\006\000\000\003", metadata !14, metadata !1, metadata !3, null, i32 ()* @main, null, null, null} ; [ DW_TAG_subprogram ] [line 3] [def] [main]
-!1 = metadata !{metadata !"0x29", metadata !14} ; [ DW_TAG_file_type ]
-!2 = metadata !{metadata !"0x11\0012\00clang version 3.0 (trunk 129138)\000\00\000\00\000", metadata !14, metadata !15, metadata !15, metadata !13, null,  null} ; [ DW_TAG_compile_unit ]
-!3 = metadata !{metadata !"0x15\00\000\000\000\000\000\000", metadata !14, metadata !1, null, metadata !4, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!0 = metadata !{i32 786478, metadata !14, metadata !1, metadata !"main", metadata !"main", metadata !"", i32 3, metadata !3, i1 false, i1 true, i32 0, i32 0, null, i32 0, i1 false, i32 ()* @main, null, null, null, i32 3} ; [ DW_TAG_subprogram ] [line 3] [def] [main]
+!1 = metadata !{i32 786473, metadata !14} ; [ DW_TAG_file_type ]
+!2 = metadata !{i32 786449, metadata !14, i32 12, metadata !"clang version 3.0 (trunk 129138)", i1 false, metadata !"", i32 0, metadata !15, metadata !15, metadata !13, null,  null, null} ; [ DW_TAG_compile_unit ]
+!3 = metadata !{i32 786453, metadata !14, metadata !1, metadata !"", i32 0, i64 0, i64 0, i32 0, i32 0, null, metadata !4, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !4 = metadata !{metadata !5}
-!5 = metadata !{metadata !"0x24\00int\000\0032\0032\000\000\005", null, metadata !2} ; [ DW_TAG_base_type ]
-!6 = metadata !{metadata !"0x100\00a\004\000", metadata !7, metadata !1, metadata !8} ; [ DW_TAG_auto_variable ]
-!7 = metadata !{metadata !"0xb\003\0012\000", metadata !14, metadata !0} ; [ DW_TAG_lexical_block ]
-!8 = metadata !{metadata !"0x1\00\000\000\0032\000\000", metadata !14, metadata !2, metadata !5, metadata !9, i32 0, null, null, null} ; [ DW_TAG_array_type ] [line 0, size 0, align 32, offset 0] [from int]
+!5 = metadata !{i32 786468, null, metadata !2, metadata !"int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ]
+!6 = metadata !{i32 786688, metadata !7, metadata !"a", metadata !1, i32 4, metadata !8, i32 0, null} ; [ DW_TAG_auto_variable ]
+!7 = metadata !{i32 786443, metadata !14, metadata !0, i32 3, i32 12, i32 0} ; [ DW_TAG_lexical_block ]
+!8 = metadata !{i32 786433, metadata !14, metadata !2, metadata !"", i32 0, i64 0, i64 32, i32 0, i32 0, metadata !5, metadata !9, i32 0, null, null, null} ; [ DW_TAG_array_type ] [line 0, size 0, align 32, offset 0] [from int]
 !9 = metadata !{metadata !10}
 ;CHECK: DW_TAG_subrange_type
 ;CHECK-NEXT: DW_AT_type
 ;CHECK-NOT: DW_AT_lower_bound
 ;CHECK-NOT: DW_AT_upper_bound
 ;CHECK-NEXT: End Of Children Mark
-!10 = metadata !{metadata !"0x21\000\00-1"}        ; [ DW_TAG_subrange_type ]
+!10 = metadata !{i32 786465, i64 0, i64 -1}        ; [ DW_TAG_subrange_type ]
 !11 = metadata !{i32 4, i32 7, metadata !7, null}
 !12 = metadata !{i32 5, i32 3, metadata !7, null}
 !13 = metadata !{metadata !0}
 !14 = metadata !{metadata !"array.c", metadata !"/private/tmp"}
 !15 = metadata !{i32 0}
-!16 = metadata !{i32 1, metadata !"Debug Info Version", i32 2}
+!16 = metadata !{i32 1, metadata !"Debug Info Version", i32 1}