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, 27 insertions, 27 deletions

diff --git a/llvm/test/CodeGen/X86/2010-05-26-DotDebugLoc.ll b/llvm/test/CodeGen/X86/2010-05-26-DotDebugLoc.ll
index 834369c0637..09120a1e39c 100644
--- a/llvm/test/CodeGen/X86/2010-05-26-DotDebugLoc.ll
+++ b/llvm/test/CodeGen/X86/2010-05-26-DotDebugLoc.ll
@@ -9,7 +9,7 @@ target triple = "x86_64-apple-darwin10"
 
 define i8* @bar(%struct.a* %myvar) nounwind optsize noinline ssp {
 entry:
-  tail call void @llvm.dbg.value(metadata !{%struct.a* %myvar}, i64 0, metadata !8, metadata !{i32 786690})
+  tail call void @llvm.dbg.value(metadata !{%struct.a* %myvar}, i64 0, metadata !8, metadata !{metadata !"0x102"})
   %0 = getelementptr inbounds %struct.a* %myvar, i64 0, i32 0, !dbg !28 ; <i32*> [#uses=1]
   %1 = load i32* %0, align 8, !dbg !28            ; <i32> [#uses=1]
   tail call void @foo(i32 %1) nounwind optsize noinline ssp, !dbg !28
@@ -24,36 +24,36 @@ declare void @llvm.dbg.value(metadata, i64, metadata, metadata) nounwind readnon
 !llvm.dbg.cu = !{!2}
 !llvm.module.flags = !{!38}
 
-!0 = metadata !{i32 786484, i32 0, metadata !1, metadata !"ret", metadata !"ret", metadata !"", metadata !1, i32 7, metadata !3, i1 false, i1 true, null, null} ; [ DW_TAG_variable ]
-!1 = metadata !{i32 786473, metadata !36} ; [ DW_TAG_file_type ]
-!2 = metadata !{i32 786449, metadata !36, i32 1, metadata !"4.2.1 (Based on Apple Inc. build 5658) (LLVM build)", i1 true, metadata !"", i32 0, metadata !37, metadata !37, metadata !32, metadata !31,  metadata !37, metadata !"", i32 1} ; [ DW_TAG_compile_unit ]
-!3 = metadata !{i32 786468, metadata !36, metadata !1, metadata !"int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ]
-!4 = metadata !{i32 786689, metadata !5, metadata !"x", metadata !1, i32 12, metadata !3, i32 0, null} ; [ DW_TAG_arg_variable ]
-!5 = metadata !{i32 786478, metadata !36, metadata !1, metadata !"foo", metadata !"foo", metadata !"foo", i32 13, metadata !6, i1 false, i1 true, i32 0, i32 0, null, i1 false, i1 true, void (i32)* @foo, null, null, metadata !33, i32 13} ; [ DW_TAG_subprogram ]
-!6 = metadata !{i32 786453, metadata !36, metadata !1, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !7, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!0 = metadata !{metadata !"0x34\00ret\00ret\00\007\000\001", metadata !1, metadata !1, metadata !3, null, null} ; [ DW_TAG_variable ]
+!1 = metadata !{metadata !"0x29", metadata !36} ; [ DW_TAG_file_type ]
+!2 = metadata !{metadata !"0x11\001\004.2.1 (Based on Apple Inc. build 5658) (LLVM build)\001\00\000\00\001", metadata !36, metadata !37, metadata !37, metadata !32, metadata !31,  metadata !37} ; [ DW_TAG_compile_unit ]
+!3 = metadata !{metadata !"0x24\00int\000\0032\0032\000\000\005", metadata !36, metadata !1} ; [ DW_TAG_base_type ]
+!4 = metadata !{metadata !"0x101\00x\0012\000", metadata !5, metadata !1, metadata !3} ; [ DW_TAG_arg_variable ]
+!5 = metadata !{metadata !"0x2e\00foo\00foo\00foo\0013\000\001\000\006\000\001\0013", metadata !36, metadata !1, metadata !6, null, void (i32)* @foo, null, null, metadata !33} ; [ DW_TAG_subprogram ]
+!6 = metadata !{metadata !"0x15\00\000\000\000\000\000\000", metadata !36, metadata !1, null, metadata !7, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !7 = metadata !{null, metadata !3}
-!8 = metadata !{i32 786689, metadata !9, metadata !"myvar", metadata !1, i32 17, metadata !13, i32 0, null} ; [ DW_TAG_arg_variable ]
-!9 = metadata !{i32 786478, metadata !36, metadata !1, metadata !"bar", metadata !"bar", metadata !"bar", i32 17, metadata !10, i1 false, i1 true, i32 0, i32 0, null, i1 false, i1 true, i8* (%struct.a*)* @bar, null, null, metadata !34, i32 17} ; [ DW_TAG_subprogram ]
-!10 = metadata !{i32 786453, metadata !36, metadata !1, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !11, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!8 = metadata !{metadata !"0x101\00myvar\0017\000", metadata !9, metadata !1, metadata !13} ; [ DW_TAG_arg_variable ]
+!9 = metadata !{metadata !"0x2e\00bar\00bar\00bar\0017\000\001\000\006\000\001\0017", metadata !36, metadata !1, metadata !10, null, i8* (%struct.a*)* @bar, null, null, metadata !34} ; [ DW_TAG_subprogram ]
+!10 = metadata !{metadata !"0x15\00\000\000\000\000\000\000", metadata !36, metadata !1, null, metadata !11, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !11 = metadata !{metadata !12, metadata !13}
-!12 = metadata !{i32 786447, metadata !36, metadata !1, metadata !"", i32 0, i64 64, i64 64, i64 0, i32 0, null} ; [ DW_TAG_pointer_type ]
-!13 = metadata !{i32 786447, metadata !36, metadata !1, metadata !"", i32 0, i64 64, i64 64, i64 0, i32 0, metadata !14} ; [ DW_TAG_pointer_type ]
-!14 = metadata !{i32 786451, metadata !36, metadata !1, metadata !"a", i32 2, i64 128, i64 64, i64 0, i32 0, null, metadata !15, i32 0, null, null, null} ; [ DW_TAG_structure_type ] [a] [line 2, size 128, align 64, offset 0] [def] [from ]
+!12 = metadata !{metadata !"0xf\00\000\0064\0064\000\000", metadata !36, metadata !1, null} ; [ DW_TAG_pointer_type ]
+!13 = metadata !{metadata !"0xf\00\000\0064\0064\000\000", metadata !36, metadata !1, metadata !14} ; [ DW_TAG_pointer_type ]
+!14 = metadata !{metadata !"0x13\00a\002\00128\0064\000\000\000", metadata !36, metadata !1, null, metadata !15, null, null, null} ; [ DW_TAG_structure_type ] [a] [line 2, size 128, align 64, offset 0] [def] [from ]
 !15 = metadata !{metadata !16, metadata !17}
-!16 = metadata !{i32 786445, metadata !36, metadata !14, metadata !"c", i32 3, i64 32, i64 32, i64 0, i32 0, metadata !3} ; [ DW_TAG_member ]
-!17 = metadata !{i32 786445, metadata !36, metadata !14, metadata !"d", i32 4, i64 64, i64 64, i64 64, i32 0, metadata !13} ; [ DW_TAG_member ]
-!18 = metadata !{i32 786689, metadata !19, metadata !"argc", metadata !1, i32 22, metadata !3, i32 0, null} ; [ DW_TAG_arg_variable ]
-!19 = metadata !{i32 786478, metadata !36, metadata !1, metadata !"main", metadata !"main", metadata !"main", i32 22, metadata !20, i1 false, i1 true, i32 0, i32 0, null, i1 false, i1 true, null, null, null, metadata !35, i32 22} ; [ DW_TAG_subprogram ]
-!20 = metadata !{i32 786453, metadata !36, metadata !1, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !21, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!16 = metadata !{metadata !"0xd\00c\003\0032\0032\000\000", metadata !36, metadata !14, metadata !3} ; [ DW_TAG_member ]
+!17 = metadata !{metadata !"0xd\00d\004\0064\0064\0064\000", metadata !36, metadata !14, metadata !13} ; [ DW_TAG_member ]
+!18 = metadata !{metadata !"0x101\00argc\0022\000", metadata !19, metadata !1, metadata !3} ; [ DW_TAG_arg_variable ]
+!19 = metadata !{metadata !"0x2e\00main\00main\00main\0022\000\001\000\006\000\001\0022", metadata !36, metadata !1, metadata !20, null, null, null, null, metadata !35} ; [ DW_TAG_subprogram ]
+!20 = metadata !{metadata !"0x15\00\000\000\000\000\000\000", metadata !36, metadata !1, null, metadata !21, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !21 = metadata !{metadata !3, metadata !3, metadata !22}
-!22 = metadata !{i32 786447, metadata !36, metadata !1, metadata !"", i32 0, i64 64, i64 64, i64 0, i32 0, metadata !23} ; [ DW_TAG_pointer_type ]
-!23 = metadata !{i32 786447, metadata !36, metadata !1, metadata !"", i32 0, i64 64, i64 64, i64 0, i32 0, metadata !24} ; [ DW_TAG_pointer_type ]
-!24 = metadata !{i32 786468, metadata !36, metadata !1, metadata !"char", i32 0, i64 8, i64 8, i64 0, i32 0, i32 6} ; [ DW_TAG_base_type ]
-!25 = metadata !{i32 786689, metadata !19, metadata !"argv", metadata !1, i32 22, metadata !22, i32 0, null} ; [ DW_TAG_arg_variable ]
-!26 = metadata !{i32 786688, metadata !27, metadata !"e", metadata !1, i32 23, metadata !14, i32 0, null} ; [ DW_TAG_auto_variable ]
-!27 = metadata !{i32 786443, metadata !36, metadata !19, i32 22, i32 0, i32 0} ; [ DW_TAG_lexical_block ]
+!22 = metadata !{metadata !"0xf\00\000\0064\0064\000\000", metadata !36, metadata !1, metadata !23} ; [ DW_TAG_pointer_type ]
+!23 = metadata !{metadata !"0xf\00\000\0064\0064\000\000", metadata !36, metadata !1, metadata !24} ; [ DW_TAG_pointer_type ]
+!24 = metadata !{metadata !"0x24\00char\000\008\008\000\000\006", metadata !36, metadata !1} ; [ DW_TAG_base_type ]
+!25 = metadata !{metadata !"0x101\00argv\0022\000", metadata !19, metadata !1, metadata !22} ; [ DW_TAG_arg_variable ]
+!26 = metadata !{metadata !"0x100\00e\0023\000", metadata !27, metadata !1, metadata !14} ; [ DW_TAG_auto_variable ]
+!27 = metadata !{metadata !"0xb\0022\000\000", metadata !36, metadata !19} ; [ DW_TAG_lexical_block ]
 !28 = metadata !{i32 18, i32 0, metadata !29, null}
-!29 = metadata !{i32 786443, metadata !36, metadata !9, i32 17, i32 0, i32 1} ; [ DW_TAG_lexical_block ]
+!29 = metadata !{metadata !"0xb\0017\000\001", metadata !36, metadata !9} ; [ DW_TAG_lexical_block ]
 !30 = metadata !{i32 19, i32 0, metadata !29, null}
 !31 = metadata !{metadata !0}
 !32 = metadata !{metadata !5, metadata !9, metadata !19}
@@ -91,4 +91,4 @@ declare void @llvm.dbg.value(metadata, i64, metadata, metadata) nounwind readnon
 ; CHECK-NEXT: Ltmp{{.*}}:
 ; CHECK-NEXT: .byte   83
 ; CHECK-NEXT: Ltmp{{.*}}:
-!38 = metadata !{i32 1, metadata !"Debug Info Version", i32 1}
+!38 = metadata !{i32 1, metadata !"Debug Info Version", i32 2}