DI: Fold constant arguments into a single MDString

This patch addresses the first stage of PR17891 by folding constant
arguments together into a single MDString.  Integers are stringified and
a `\0` character is used as a separator.

Part of PR17891.

Note: I've attached my testcases upgrade scripts to the PR.  If I've
just broken your out-of-tree testcases, they might help.

llvm-svn: 218914

1 files changed, 14 insertions, 14 deletions

diff --git a/llvm/test/DebugInfo/X86/enum-class.ll b/llvm/test/DebugInfo/X86/enum-class.ll
index 23ffbcc8f78..7520d08d1c3 100644
--- a/llvm/test/DebugInfo/X86/enum-class.ll
+++ b/llvm/test/DebugInfo/X86/enum-class.ll
@@ -8,25 +8,25 @@
 !llvm.dbg.cu = !{!0}
 !llvm.module.flags = !{!23}
 
-!0 = metadata !{i32 786449, metadata !22, i32 4, metadata !"clang version 3.2 (trunk 157269) (llvm/trunk 157264)", i1 false, metadata !"", i32 0, metadata !1, metadata !15, metadata !15, metadata !17,  metadata !15, metadata !""} ; [ DW_TAG_compile_unit ]
+!0 = metadata !{metadata !"0x11\004\00clang version 3.2 (trunk 157269) (llvm/trunk 157264)\000\00\000\00\000", metadata !22, metadata !1, metadata !15, metadata !15, metadata !17,  metadata !15} ; [ DW_TAG_compile_unit ]
 !1 = metadata !{metadata !3, metadata !8, metadata !12}
-!3 = metadata !{i32 786436, metadata !4, null, metadata !"A", i32 1, i64 32, i64 32, i32 0, i32 0, metadata !5, metadata !6, i32 0, null, null, null} ; [ DW_TAG_enumeration_type ] [A] [line 1, size 32, align 32, offset 0] [def] [from int]
-!4 = metadata !{i32 786473, metadata !22} ; [ DW_TAG_file_type ]
-!5 = metadata !{i32 786468, null, null, metadata !"int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ]
+!3 = metadata !{metadata !"0x4\00A\001\0032\0032\000\000\000", metadata !4, null, metadata !5, metadata !6, null, null, null} ; [ DW_TAG_enumeration_type ] [A] [line 1, size 32, align 32, offset 0] [def] [from int]
+!4 = metadata !{metadata !"0x29", metadata !22} ; [ DW_TAG_file_type ]
+!5 = metadata !{metadata !"0x24\00int\000\0032\0032\000\000\005", null, null} ; [ DW_TAG_base_type ]
 !6 = metadata !{metadata !7}
-!7 = metadata !{i32 786472, metadata !"A1", i64 1} ; [ DW_TAG_enumerator ]
-!8 = metadata !{i32 786436, metadata !4, null, metadata !"B", i32 2, i64 64, i64 64, i32 0, i32 0, metadata !9, metadata !10, i32 0, null, null, null} ; [ DW_TAG_enumeration_type ] [B] [line 2, size 64, align 64, offset 0] [def] [from long unsigned int]
-!9 = metadata !{i32 786468, null, null, metadata !"long unsigned int", i32 0, i64 64, i64 64, i64 0, i32 0, i32 7} ; [ DW_TAG_base_type ]
+!7 = metadata !{metadata !"0x28\00A1\001"} ; [ DW_TAG_enumerator ]
+!8 = metadata !{metadata !"0x4\00B\002\0064\0064\000\000\000", metadata !4, null, metadata !9, metadata !10, null, null, null} ; [ DW_TAG_enumeration_type ] [B] [line 2, size 64, align 64, offset 0] [def] [from long unsigned int]
+!9 = metadata !{metadata !"0x24\00long unsigned int\000\0064\0064\000\000\007", null, null} ; [ DW_TAG_base_type ]
 !10 = metadata !{metadata !11}
-!11 = metadata !{i32 786472, metadata !"B1", i64 1} ; [ DW_TAG_enumerator ]
-!12 = metadata !{i32 786436, metadata !4, null, metadata !"C", i32 3, i64 32, i64 32, i32 0, i32 0, null, metadata !13, i32 0, null, null, null} ; [ DW_TAG_enumeration_type ] [C] [line 3, size 32, align 32, offset 0] [def] [from ]
+!11 = metadata !{metadata !"0x28\00B1\001"} ; [ DW_TAG_enumerator ]
+!12 = metadata !{metadata !"0x4\00C\003\0032\0032\000\000\000", metadata !4, null, null, metadata !13, null, null, null} ; [ DW_TAG_enumeration_type ] [C] [line 3, size 32, align 32, offset 0] [def] [from ]
 !13 = metadata !{metadata !14}
-!14 = metadata !{i32 786472, metadata !"C1", i64 1} ; [ DW_TAG_enumerator ]
+!14 = metadata !{metadata !"0x28\00C1\001"} ; [ DW_TAG_enumerator ]
 !15 = metadata !{}
 !17 = metadata !{metadata !19, metadata !20, metadata !21}
-!19 = metadata !{i32 786484, i32 0, null, metadata !"a", metadata !"a", metadata !"", metadata !4, i32 4, metadata !3, i32 0, i32 1, i32* @a, null} ; [ DW_TAG_variable ]
-!20 = metadata !{i32 786484, i32 0, null, metadata !"b", metadata !"b", metadata !"", metadata !4, i32 5, metadata !8, i32 0, i32 1, i64* @b, null} ; [ DW_TAG_variable ]
-!21 = metadata !{i32 786484, i32 0, null, metadata !"c", metadata !"c", metadata !"", metadata !4, i32 6, metadata !12, i32 0, i32 1, i32* @c, null} ; [ DW_TAG_variable ]
+!19 = metadata !{metadata !"0x34\00a\00a\00\004\000\001", null, metadata !4, metadata !3, i32* @a, null} ; [ DW_TAG_variable ]
+!20 = metadata !{metadata !"0x34\00b\00b\00\005\000\001", null, metadata !4, metadata !8, i64* @b, null} ; [ DW_TAG_variable ]
+!21 = metadata !{metadata !"0x34\00c\00c\00\006\000\001", null, metadata !4, metadata !12, i32* @c, null} ; [ DW_TAG_variable ]
 !22 = metadata !{metadata !"foo.cpp", metadata !"/Users/echristo/tmp"}
 
 ; CHECK: DW_TAG_enumeration_type [{{.*}}]
@@ -42,4 +42,4 @@
 ; CHECK: DW_TAG_enumeration_type [6]
 ; CHECK-NOT: DW_AT_enum_class
 ; CHECK: DW_AT_name [DW_FORM_strp]      ( .debug_str[{{.*}}] = "C")
-!23 = metadata !{i32 1, metadata !"Debug Info Version", i32 1}
+!23 = metadata !{i32 1, metadata !"Debug Info Version", i32 2}