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, 11 insertions, 11 deletions

diff --git a/llvm/test/Transforms/LoopRotate/dbgvalue.ll b/llvm/test/Transforms/LoopRotate/dbgvalue.ll
index 79029c6b8c4..e90065609aa 100644
--- a/llvm/test/Transforms/LoopRotate/dbgvalue.ll
+++ b/llvm/test/Transforms/LoopRotate/dbgvalue.ll
@@ -84,24 +84,24 @@ for.end:
 !llvm.module.flags = !{!20}
 !llvm.dbg.sp = !{!0}
 
-!0 = metadata !{i32 589870, metadata !18, metadata !1, metadata !"tak", metadata !"tak", metadata !"", i32 32, metadata !3, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, i32 (i32, i32, i32)* @tak, null, null, null, i32 0} ; [ DW_TAG_subprogram ] [line 32] [def] [scope 0] [tak]
-!1 = metadata !{i32 589865, metadata !18} ; [ DW_TAG_file_type ]
-!2 = metadata !{i32 589841, metadata !18, i32 12, metadata !"clang version 2.9 (trunk 125492)", i1 true, metadata !"", i32 0, metadata !19, metadata !19, null, null, null, metadata !""} ; [ DW_TAG_compile_unit ]
-!3 = metadata !{i32 589845, metadata !18, 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 ]
+!0 = metadata !{metadata !"0x2e\00tak\00tak\00\0032\000\001\000\006\00256\000\000", metadata !18, metadata !1, metadata !3, null, i32 (i32, i32, i32)* @tak, null, null, null} ; [ DW_TAG_subprogram ] [line 32] [def] [scope 0] [tak]
+!1 = metadata !{metadata !"0x29", metadata !18} ; [ DW_TAG_file_type ]
+!2 = metadata !{metadata !"0x11\0012\00clang version 2.9 (trunk 125492)\001\00\000\00\000", metadata !18, metadata !19, metadata !19, null, null, null} ; [ DW_TAG_compile_unit ]
+!3 = metadata !{metadata !"0x15\00\000\000\000\000\000\000", metadata !18, metadata !1, null, metadata !4, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !4 = metadata !{metadata !5}
-!5 = metadata !{i32 589860, null, metadata !2, metadata !"int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ]
-!6 = metadata !{i32 590081, metadata !0, metadata !"x", metadata !1, i32 32, metadata !5, i32 0} ; [ DW_TAG_arg_variable ]
+!5 = metadata !{metadata !"0x24\00int\000\0032\0032\000\000\005", null, metadata !2} ; [ DW_TAG_base_type ]
+!6 = metadata !{metadata !"0x101\00x\0032\000", metadata !0, metadata !1, metadata !5} ; [ DW_TAG_arg_variable ]
 !7 = metadata !{i32 32, i32 13, metadata !0, null}
-!8 = metadata !{i32 590081, metadata !0, metadata !"y", metadata !1, i32 32, metadata !5, i32 0} ; [ DW_TAG_arg_variable ]
+!8 = metadata !{metadata !"0x101\00y\0032\000", metadata !0, metadata !1, metadata !5} ; [ DW_TAG_arg_variable ]
 !9 = metadata !{i32 32, i32 20, metadata !0, null}
-!10 = metadata !{i32 590081, metadata !0, metadata !"z", metadata !1, i32 32, metadata !5, i32 0} ; [ DW_TAG_arg_variable ]
+!10 = metadata !{metadata !"0x101\00z\0032\000", metadata !0, metadata !1, metadata !5} ; [ DW_TAG_arg_variable ]
 !11 = metadata !{i32 32, i32 27, metadata !0, null}
 !12 = metadata !{i32 33, i32 3, metadata !13, null}
-!13 = metadata !{i32 589835, metadata !18, metadata !0, i32 32, i32 30, i32 6} ; [ DW_TAG_lexical_block ]
+!13 = metadata !{metadata !"0xb\0032\0030\006", metadata !18, metadata !0} ; [ DW_TAG_lexical_block ]
 !14 = metadata !{i32 34, i32 5, metadata !15, null}
-!15 = metadata !{i32 589835, metadata !18, metadata !13, i32 33, i32 14, i32 7} ; [ DW_TAG_lexical_block ]
+!15 = metadata !{metadata !"0xb\0033\0014\007", metadata !18, metadata !13} ; [ DW_TAG_lexical_block ]
 !16 = metadata !{i32 36, i32 3, metadata !13, null}
 !17 = metadata !{i32 37, i32 1, metadata !13, null}
 !18 = metadata !{metadata !"/Volumes/Lalgate/cj/llvm/projects/llvm-test/SingleSource/Benchmarks/BenchmarkGame/recursive.c", metadata !"/Volumes/Lalgate/cj/D/projects/llvm-test/SingleSource/Benchmarks/BenchmarkGame"}
 !19 = metadata !{i32 0}
-!20 = metadata !{i32 1, metadata !"Debug Info Version", i32 1}
+!20 = metadata !{i32 1, metadata !"Debug Info Version", i32 2}