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

This reverts commit r218918, effectively reapplying r218914 after fixing
an Ocaml bindings test and an Asan crash.  The root cause of the latter
was a tightened-up check in `DILexicalBlock::Verify()`, so I'll file a
PR to investigate who requires the loose check (and why).

Original commit message follows.

--

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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219010 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 14 insertions, 14 deletions

diff --git a/test/CodeGen/PowerPC/dbg.ll b/test/CodeGen/PowerPC/dbg.ll
index 53a9dccfa27..04338a6b0cd 100644
--- a/test/CodeGen/PowerPC/dbg.ll
+++ b/test/CodeGen/PowerPC/dbg.ll
@@ -6,8 +6,8 @@ target triple = "powerpc64-unknown-linux-gnu"
 
 define i32 @main(i32 %argc, i8** nocapture %argv) nounwind readnone {
 entry:
-  tail call void @llvm.dbg.value(metadata !{i32 %argc}, i64 0, metadata !15, metadata !{i32 786690}), !dbg !17
-  tail call void @llvm.dbg.value(metadata !{i8** %argv}, i64 0, metadata !16, metadata !{i32 786690}), !dbg !18
+  tail call void @llvm.dbg.value(metadata !{i32 %argc}, i64 0, metadata !15, metadata !{metadata !"0x102"}), !dbg !17
+  tail call void @llvm.dbg.value(metadata !{i8** %argv}, i64 0, metadata !16, metadata !{metadata !"0x102"}), !dbg !18
   %add = add nsw i32 %argc, 1, !dbg !19
   ret i32 %add, !dbg !19
 }
@@ -17,23 +17,23 @@ declare void @llvm.dbg.value(metadata, i64, metadata, metadata) nounwind readnon
 !llvm.dbg.cu = !{!0}
 !llvm.module.flags = !{!22}
 
-!0 = metadata !{i32 720913, metadata !21, i32 12, metadata !"clang version 3.1", i1 true, metadata !"", i32 0, metadata !1, metadata !1, metadata !3, metadata !1, metadata !"", metadata !""} ; [ DW_TAG_compile_unit ]
+!0 = metadata !{metadata !"0x11\0012\00clang version 3.1\001\00\000\00\000", metadata !21, metadata !1, metadata !1, metadata !3, metadata !1, metadata !""} ; [ DW_TAG_compile_unit ]
 !1 = metadata !{}
 !3 = metadata !{metadata !5}
-!5 = metadata !{i32 720942, metadata !21, null, metadata !"main", metadata !"main", metadata !"", i32 1, metadata !7, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 true, i32 (i32, i8**)* @main, null, null, metadata !13, i32 0} ; [ DW_TAG_subprogram ]
-!6 = metadata !{i32 720937, metadata !21} ; [ DW_TAG_file_type ]
-!7 = metadata !{i32 720917, i32 0, null, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !8, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!5 = metadata !{metadata !"0x2e\00main\00main\00\001\000\001\000\006\00256\001\000", metadata !21, null, metadata !7, null, i32 (i32, i8**)* @main, null, null, metadata !13} ; [ DW_TAG_subprogram ]
+!6 = metadata !{metadata !"0x29", metadata !21} ; [ DW_TAG_file_type ]
+!7 = metadata !{metadata !"0x15\00\000\000\000\000\000\000", i32 0, null, null, metadata !8, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !8 = metadata !{metadata !9, metadata !9, metadata !10}
-!9 = metadata !{i32 720932, null, null, metadata !"int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ]
-!10 = metadata !{i32 720911, null, null, metadata !"", i32 0, i64 64, i64 64, i64 0, i32 0, metadata !11} ; [ DW_TAG_pointer_type ]
-!11 = metadata !{i32 720911, null, null, metadata !"", i32 0, i64 64, i64 64, i64 0, i32 0, metadata !12} ; [ DW_TAG_pointer_type ]
-!12 = metadata !{i32 720932, null, null, metadata !"char", i32 0, i64 8, i64 8, i64 0, i32 0, i32 8} ; [ DW_TAG_base_type ]
+!9 = metadata !{metadata !"0x24\00int\000\0032\0032\000\000\005", null, null} ; [ DW_TAG_base_type ]
+!10 = metadata !{metadata !"0xf\00\000\0064\0064\000\000", null, null, metadata !11} ; [ DW_TAG_pointer_type ]
+!11 = metadata !{metadata !"0xf\00\000\0064\0064\000\000", null, null, metadata !12} ; [ DW_TAG_pointer_type ]
+!12 = metadata !{metadata !"0x24\00char\000\008\008\000\000\008", null, null} ; [ DW_TAG_base_type ]
 !13 = metadata !{metadata !15, metadata !16}
-!15 = metadata !{i32 721153, metadata !5, metadata !"argc", metadata !6, i32 16777217, metadata !9, i32 0, i32 0} ; [ DW_TAG_arg_variable ]
-!16 = metadata !{i32 721153, metadata !5, metadata !"argv", metadata !6, i32 33554433, metadata !10, i32 0, i32 0} ; [ DW_TAG_arg_variable ]
+!15 = metadata !{metadata !"0x101\00argc\0016777217\000", metadata !5, metadata !6, metadata !9} ; [ DW_TAG_arg_variable ]
+!16 = metadata !{metadata !"0x101\00argv\0033554433\000", metadata !5, metadata !6, metadata !10} ; [ DW_TAG_arg_variable ]
 !17 = metadata !{i32 1, i32 14, metadata !5, null}
 !18 = metadata !{i32 1, i32 26, metadata !5, null}
 !19 = metadata !{i32 2, i32 3, metadata !20, null}
-!20 = metadata !{i32 720907, metadata !21, metadata !5, i32 1, i32 34, i32 0} ; [ DW_TAG_lexical_block ]
+!20 = metadata !{metadata !"0xb\001\0034\000", metadata !21, metadata !5} ; [ DW_TAG_lexical_block ]
 !21 = metadata !{metadata !"dbg.c", metadata !"/src"}
-!22 = metadata !{i32 1, metadata !"Debug Info Version", i32 1}
+!22 = metadata !{i32 1, metadata !"Debug Info Version", i32 2}