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, 13 insertions, 13 deletions

diff --git a/llvm/test/DebugInfo/X86/nondefault-subrange-array.ll b/llvm/test/DebugInfo/X86/nondefault-subrange-array.ll
index dbf6cb6fecb..212114fa61e 100644
--- a/llvm/test/DebugInfo/X86/nondefault-subrange-array.ll
+++ b/llvm/test/DebugInfo/X86/nondefault-subrange-array.ll
@@ -30,23 +30,23 @@
 !llvm.dbg.cu = !{!0}
 !llvm.module.flags = !{!21}
 
-!0 = metadata !{i32 786449, metadata !20, i32 4, metadata !"clang version 3.3 (trunk 169136)", i1 false, metadata !"", i32 0, metadata !1, metadata !1, metadata !1, metadata !3,  metadata !1, metadata !""} ; [ DW_TAG_compile_unit ] [/Volumes/Sandbox/llvm/t.cpp] [DW_LANG_C_plus_plus]
+!0 = metadata !{metadata !"0x11\004\00clang version 3.3 (trunk 169136)\000\00\000\00\000", metadata !20, metadata !1, metadata !1, metadata !1, metadata !3,  metadata !1} ; [ DW_TAG_compile_unit ] [/Volumes/Sandbox/llvm/t.cpp] [DW_LANG_C_plus_plus]
 !1 = metadata !{}
 !3 = metadata !{metadata !5}
-!5 = metadata !{i32 786484, i32 0, null, metadata !"a", metadata !"a", metadata !"", metadata !6, i32 1, metadata !7, i32 0, i32 1, %class.A* @a, null} ; [ DW_TAG_variable ] [a] [line 1] [def]
-!6 = metadata !{i32 786473, metadata !20} ; [ DW_TAG_file_type ]
-!7 = metadata !{i32 786434, metadata !20, null, metadata !"A", i32 1, i64 0, i64 32, i32 0, i32 0, null, metadata !8, i32 0, null, null, null} ; [ DW_TAG_class_type ] [A] [line 1, size 0, align 32, offset 0] [def] [from ]
+!5 = metadata !{metadata !"0x34\00a\00a\00\001\000\001", null, metadata !6, metadata !7, %class.A* @a, null} ; [ DW_TAG_variable ] [a] [line 1] [def]
+!6 = metadata !{metadata !"0x29", metadata !20} ; [ DW_TAG_file_type ]
+!7 = metadata !{metadata !"0x2\00A\001\000\0032\000\000\000", metadata !20, null, null, metadata !8, null, null, null} ; [ DW_TAG_class_type ] [A] [line 1, size 0, align 32, offset 0] [def] [from ]
 !8 = metadata !{metadata !9, metadata !14}
-!9 = metadata !{i32 786445, metadata !20, metadata !7, metadata !"x", i32 1, i64 0, i64 0, i64 0, i32 1, metadata !10} ; [ DW_TAG_member ] [x] [line 1, size 0, align 0, offset 0] [private] [from ]
-!10 = metadata !{i32 786433, null, null, metadata !"", i32 0, i64 0, i64 32, i32 0, i32 0, metadata !11, metadata !12, i32 0, null, null, null} ; [ DW_TAG_array_type ] [line 0, size 0, align 32, offset 0] [from int]
-!11 = metadata !{i32 786468, null, null, metadata !"int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ] [int] [line 0, size 32, align 32, offset 0, enc DW_ATE_signed]
+!9 = metadata !{metadata !"0xd\00x\001\000\000\000\001", metadata !20, metadata !7, metadata !10} ; [ DW_TAG_member ] [x] [line 1, size 0, align 0, offset 0] [private] [from ]
+!10 = metadata !{metadata !"0x1\00\000\000\0032\000\000", null, null, metadata !11, metadata !12, i32 0, null, null, null} ; [ DW_TAG_array_type ] [line 0, size 0, align 32, offset 0] [from int]
+!11 = metadata !{metadata !"0x24\00int\000\0032\0032\000\000\005", null, null} ; [ DW_TAG_base_type ] [int] [line 0, size 32, align 32, offset 0, enc DW_ATE_signed]
 !12 = metadata !{metadata !13}
-!13 = metadata !{i32 786465, i64 -3, i64 42} ; [ DW_TAG_subrange_type ] [-3, 39]
-!14 = metadata !{i32 786478, metadata !6, metadata !7, metadata !"A", metadata !"A", metadata !"", i32 1, metadata !15, i1 false, i1 false, i32 0, i32 0, null, i32 320, i1 false, null, null, i32 0, metadata !18, i32 1} ; [ DW_TAG_subprogram ] [line 1] [A]
-!15 = metadata !{i32 786453, i32 0, null, i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !16, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!13 = metadata !{metadata !"0x21\00-3\0042"} ; [ DW_TAG_subrange_type ] [-3, 39]
+!14 = metadata !{metadata !"0x2e\00A\00A\00\001\000\000\000\006\00320\000\001", metadata !6, metadata !7, metadata !15, null, null, null, i32 0, metadata !18} ; [ DW_TAG_subprogram ] [line 1] [A]
+!15 = metadata !{metadata !"0x15\00\000\000\000\000\000\000", i32 0, null, null, metadata !16, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !16 = metadata !{null, metadata !17}
-!17 = metadata !{i32 786447, i32 0, null, i32 0, i32 0, i64 64, i64 64, i64 0, i32 1088, metadata !7} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [from A]
+!17 = metadata !{metadata !"0xf\00\000\0064\0064\000\001088", i32 0, null, metadata !7} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [from A]
 !18 = metadata !{metadata !19}
-!19 = metadata !{i32 786468}                      ; [ DW_TAG_base_type ] [line 0, size 0, align 0, offset 0]
+!19 = metadata !{metadata !"0x24"}                      ; [ DW_TAG_base_type ] [line 0, size 0, align 0, offset 0]
 !20 = metadata !{metadata !"t.cpp", metadata !"/Volumes/Sandbox/llvm"}
-!21 = metadata !{i32 1, metadata !"Debug Info Version", i32 1}
+!21 = metadata !{i32 1, metadata !"Debug Info Version", i32 2}