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, 12 insertions, 12 deletions

diff --git a/llvm/test/CodeGen/ARM/debug-info-sreg2.ll b/llvm/test/CodeGen/ARM/debug-info-sreg2.ll
index 74cff76d440..4374b9e56b7 100644
--- a/llvm/test/CodeGen/ARM/debug-info-sreg2.ll
+++ b/llvm/test/CodeGen/ARM/debug-info-sreg2.ll
@@ -15,7 +15,7 @@ target triple = "thumbv7-apple-macosx10.6.7"
 define void @_Z3foov() optsize ssp {
 entry:
   %call = tail call float @_Z3barv() optsize, !dbg !11
-  tail call void @llvm.dbg.value(metadata !{float %call}, i64 0, metadata !5, metadata !{i32 786690}), !dbg !11
+  tail call void @llvm.dbg.value(metadata !{float %call}, i64 0, metadata !5, metadata !{metadata !"0x102"}), !dbg !11
   %call16 = tail call float @_Z2f2v() optsize, !dbg !12
   %cmp7 = fcmp olt float %call, %call16, !dbg !12
   br i1 %cmp7, label %for.body, label %for.end, !dbg !12
@@ -43,17 +43,17 @@ declare void @llvm.dbg.value(metadata, i64, metadata, metadata) nounwind readnon
 !llvm.dbg.cu = !{!0}
 !llvm.module.flags = !{!20}
 
-!0 = metadata !{i32 786449, metadata !18, i32 4, metadata !"clang version 3.0 (trunk 130845)", i1 true, metadata !"", i32 0, metadata !19, metadata !19, metadata !16, null,  null, null, i32 1} ; [ DW_TAG_compile_unit ]
-!1 = metadata !{i32 786478, metadata !18, metadata !2, metadata !"foo", metadata !"foo", metadata !"_Z3foov", i32 5, metadata !3, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 true, void ()* @_Z3foov, null, null, metadata !17, i32 5} ; [ DW_TAG_subprogram ] [line 5] [def] [foo]
-!2 = metadata !{i32 786473, metadata !18} ; [ DW_TAG_file_type ]
-!3 = metadata !{i32 786453, metadata !18, metadata !2, 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 !"0x11\004\00clang version 3.0 (trunk 130845)\001\00\000\00\001", metadata !18, metadata !19, metadata !19, metadata !16, null,  null} ; [ DW_TAG_compile_unit ]
+!1 = metadata !{metadata !"0x2e\00foo\00foo\00_Z3foov\005\000\001\000\006\00256\001\005", metadata !18, metadata !2, metadata !3, null, void ()* @_Z3foov, null, null, metadata !17} ; [ DW_TAG_subprogram ] [line 5] [def] [foo]
+!2 = metadata !{metadata !"0x29", metadata !18} ; [ DW_TAG_file_type ]
+!3 = metadata !{metadata !"0x15\00\000\000\000\000\000\000", metadata !18, metadata !2, 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 786688, metadata !6, metadata !"k", metadata !2, i32 6, metadata !7, i32 0, null} ; [ DW_TAG_auto_variable ]
-!6 = metadata !{i32 786443, metadata !18, metadata !1, i32 5, i32 12, i32 0} ; [ DW_TAG_lexical_block ]
-!7 = metadata !{i32 786468, null, metadata !0, metadata !"float", i32 0, i64 32, i64 32, i64 0, i32 0, i32 4} ; [ DW_TAG_base_type ]
-!8 = metadata !{i32 786688, metadata !9, metadata !"y", metadata !2, i32 8, metadata !7, i32 0, null} ; [ DW_TAG_auto_variable ]
-!9 = metadata !{i32 786443, metadata !18, metadata !10, i32 7, i32 25, i32 2} ; [ DW_TAG_lexical_block ]
-!10 = metadata !{i32 786443, metadata !18, metadata !6, i32 7, i32 3, i32 1} ; [ DW_TAG_lexical_block ]
+!5 = metadata !{metadata !"0x100\00k\006\000", metadata !6, metadata !2, metadata !7} ; [ DW_TAG_auto_variable ]
+!6 = metadata !{metadata !"0xb\005\0012\000", metadata !18, metadata !1} ; [ DW_TAG_lexical_block ]
+!7 = metadata !{metadata !"0x24\00float\000\0032\0032\000\000\004", null, metadata !0} ; [ DW_TAG_base_type ]
+!8 = metadata !{metadata !"0x100\00y\008\000", metadata !9, metadata !2, metadata !7} ; [ DW_TAG_auto_variable ]
+!9 = metadata !{metadata !"0xb\007\0025\002", metadata !18, metadata !10} ; [ DW_TAG_lexical_block ]
+!10 = metadata !{metadata !"0xb\007\003\001", metadata !18, metadata !6} ; [ DW_TAG_lexical_block ]
 !11 = metadata !{i32 6, i32 18, metadata !6, null}
 !12 = metadata !{i32 7, i32 3, metadata !6, null}
 !13 = metadata !{i32 8, i32 20, metadata !9, null}
@@ -63,4 +63,4 @@ declare void @llvm.dbg.value(metadata, i64, metadata, metadata) nounwind readnon
 !17 = metadata !{metadata !5, metadata !8}
 !18 = metadata !{metadata !"k.cc", metadata !"/private/tmp"}
 !19 = metadata !{i32 0}
-!20 = metadata !{i32 1, metadata !"Debug Info Version", i32 1}
+!20 = metadata !{i32 1, metadata !"Debug Info Version", i32 2}