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, 9 insertions, 9 deletions

diff --git a/llvm/test/DebugInfo/X86/2010-08-10-DbgConstant.ll b/llvm/test/DebugInfo/X86/2010-08-10-DbgConstant.ll
index 7f42e7b70ec..7a1b4fe3ea3 100644
--- a/llvm/test/DebugInfo/X86/2010-08-10-DbgConstant.ll
+++ b/llvm/test/DebugInfo/X86/2010-08-10-DbgConstant.ll
@@ -14,18 +14,18 @@ declare void @bar(i32)
 !llvm.dbg.cu = !{!2}
 !llvm.module.flags = !{!13}
 
-!0 = metadata !{i32 786478, metadata !12, metadata !1, metadata !"foo", metadata !"foo", metadata !"foo", i32 3, metadata !3, i1 false, i1 true, i32 0, i32 0, null, i1 false, i1 false, void ()* @foo, null, null, null, i32 3} ; [ DW_TAG_subprogram ]
-!1 = metadata !{i32 786473, metadata !12} ; [ DW_TAG_file_type ]
-!2 = metadata !{i32 786449, metadata !12, i32 12, metadata !"clang 2.8", i1 false, metadata !"", i32 0, metadata !4, metadata !4, metadata !10, metadata !11,  metadata !14, metadata !""} ; [ DW_TAG_compile_unit ]
-!3 = metadata !{i32 786453, metadata !12, metadata !1, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !4, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!0 = metadata !{metadata !"0x2e\00foo\00foo\00foo\003\000\001\000\006\000\000\003", metadata !12, metadata !1, metadata !3, null, void ()* @foo, null, null, null} ; [ DW_TAG_subprogram ]
+!1 = metadata !{metadata !"0x29", metadata !12} ; [ DW_TAG_file_type ]
+!2 = metadata !{metadata !"0x11\0012\00clang 2.8\000\00\000\00\000", metadata !12, metadata !4, metadata !4, metadata !10, metadata !11,  metadata !14} ; [ DW_TAG_compile_unit ]
+!3 = metadata !{metadata !"0x15\00\000\000\000\000\000\000", metadata !12, metadata !1, null, metadata !4, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !4 = metadata !{null}
-!5 = metadata !{i32 786471, i32 0, metadata !1, metadata !"ro", metadata !"ro", metadata !"ro", metadata !1, i32 1, metadata !6, i1 true, i1 true, i32 201, null} ; [ DW_TAG_constant ]
-!6 = metadata !{i32 786470, metadata !12, metadata !1, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, metadata !7} ; [ DW_TAG_const_type ]
-!7 = metadata !{i32 786468, metadata !12, metadata !1, metadata !"unsigned int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 7} ; [ DW_TAG_base_type ]
+!5 = metadata !{metadata !"0x27\00ro\00ro\00ro\001\001\001", metadata !1, metadata !1, metadata !6, i32 201, null} ; [ DW_TAG_constant ]
+!6 = metadata !{metadata !"0x26\00\000\000\000\000\000", metadata !12, metadata !1, metadata !7} ; [ DW_TAG_const_type ]
+!7 = metadata !{metadata !"0x24\00unsigned int\000\0032\0032\000\000\007", metadata !12, metadata !1} ; [ DW_TAG_base_type ]
 !8 = metadata !{i32 3, i32 14, metadata !9, null}
-!9 = metadata !{i32 786443, metadata !12, metadata !0, i32 3, i32 12, i32 0} ; [ DW_TAG_lexical_block ]
+!9 = metadata !{metadata !"0xb\003\0012\000", metadata !12, metadata !0} ; [ DW_TAG_lexical_block ]
 !10 = metadata !{metadata !0}
 !11 = metadata !{metadata !5}
 !12 = metadata !{metadata !"/tmp/l.c", metadata !"/Volumes/Lalgate/clean/D"}
-!13 = metadata !{i32 1, metadata !"Debug Info Version", i32 1}
+!13 = metadata !{i32 1, metadata !"Debug Info Version", i32 2}
 !14 = metadata !{}