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, 13 insertions, 13 deletions

diff --git a/llvm/test/Transforms/LoopVectorize/debugloc.ll b/llvm/test/Transforms/LoopVectorize/debugloc.ll
index 5250b1e5042..6350296a7dc 100644
--- a/llvm/test/Transforms/LoopVectorize/debugloc.ll
+++ b/llvm/test/Transforms/LoopVectorize/debugloc.ll
@@ -63,28 +63,28 @@ attributes #1 = { nounwind readnone }
 !llvm.dbg.cu = !{!0}
 !llvm.module.flags = !{!18, !27}
 
-!0 = metadata !{i32 786449, metadata !1, i32 12, metadata !"clang version 3.4 (trunk 185038) (llvm/trunk 185097)", i1 true, metadata !"", i32 0, metadata !2, metadata !2, metadata !3, metadata !2, metadata !2, metadata !""} ; [ DW_TAG_compile_unit ] [/Volumes/Data/backedup/dev/os/llvm/debug/-] [DW_LANG_C99]
+!0 = metadata !{metadata !"0x11\0012\00clang version 3.4 (trunk 185038) (llvm/trunk 185097)\001\00\000\00\000", metadata !1, metadata !2, metadata !2, metadata !3, metadata !2, metadata !2} ; [ DW_TAG_compile_unit ] [/Volumes/Data/backedup/dev/os/llvm/debug/-] [DW_LANG_C99]
 !1 = metadata !{metadata !"-", metadata !"/Volumes/Data/backedup/dev/os/llvm/debug"}
 !2 = metadata !{i32 0}
 !3 = metadata !{metadata !4}
-!4 = metadata !{i32 786478, metadata !5, metadata !6, metadata !"f", metadata !"f", metadata !"", i32 3, metadata !7, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 true, i32 (i32*, i32)* @f, null, null, metadata !12, i32 3} ; [ DW_TAG_subprogram ] [line 3] [def] [f]
+!4 = metadata !{metadata !"0x2e\00f\00f\00\003\000\001\000\006\00256\001\003", metadata !5, metadata !6, metadata !7, null, i32 (i32*, i32)* @f, null, null, metadata !12} ; [ DW_TAG_subprogram ] [line 3] [def] [f]
 !5 = metadata !{metadata !"<stdin>", metadata !"/Volumes/Data/backedup/dev/os/llvm/debug"}
-!6 = metadata !{i32 786473, metadata !5}          ; [ DW_TAG_file_type ] [/Volumes/Data/backedup/dev/os/llvm/debug/<stdin>]
-!7 = metadata !{i32 786453, 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 ]
+!6 = metadata !{metadata !"0x29", metadata !5}          ; [ DW_TAG_file_type ] [/Volumes/Data/backedup/dev/os/llvm/debug/<stdin>]
+!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 !10, metadata !11}
-!9 = metadata !{i32 786468, null, null, metadata !"int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ] [int] [line 0, size 32, align 32, offset 0, enc DW_ATE_signed]
-!10 = metadata !{i32 786447, null, null, metadata !"", i32 0, i64 64, i64 64, i64 0, i32 0, metadata !9} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [from int]
-!11 = metadata !{i32 786468, null, null, metadata !"unsigned int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 7} ; [ DW_TAG_base_type ] [unsigned int] [line 0, size 32, align 32, offset 0, enc DW_ATE_unsigned]
+!9 = metadata !{metadata !"0x24\00int\000\0032\0032\000\000\005", null, null} ; [ DW_TAG_base_type ] [int] [line 0, size 32, align 32, offset 0, enc DW_ATE_signed]
+!10 = metadata !{metadata !"0xf\00\000\0064\0064\000\000", null, null, metadata !9} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [from int]
+!11 = metadata !{metadata !"0x24\00unsigned int\000\0032\0032\000\000\007", null, null} ; [ DW_TAG_base_type ] [unsigned int] [line 0, size 32, align 32, offset 0, enc DW_ATE_unsigned]
 !12 = metadata !{metadata !13, metadata !14, metadata !15, metadata !16}
-!13 = metadata !{i32 786689, metadata !4, metadata !"a", metadata !6, i32 16777219, metadata !10, i32 0, i32 0} ; [ DW_TAG_arg_variable ] [a] [line 3]
-!14 = metadata !{i32 786689, metadata !4, metadata !"size", metadata !6, i32 33554435, metadata !11, i32 0, i32 0} ; [ DW_TAG_arg_variable ] [size] [line 3]
-!15 = metadata !{i32 786688, metadata !4, metadata !"sum", metadata !6, i32 4, metadata !11, i32 0, i32 0} ; [ DW_TAG_auto_variable ] [sum] [line 4]
-!16 = metadata !{i32 786688, metadata !17, metadata !"i", metadata !6, i32 5, metadata !11, i32 0, i32 0} ; [ DW_TAG_auto_variable ] [i] [line 5]
-!17 = metadata !{i32 786443, metadata !5, metadata !4, i32 5, i32 0, i32 0} ; [ DW_TAG_lexical_block ] [/Volumes/Data/backedup/dev/os/llvm/debug/<stdin>]
+!13 = metadata !{metadata !"0x101\00a\0016777219\000", metadata !4, metadata !6, metadata !10} ; [ DW_TAG_arg_variable ] [a] [line 3]
+!14 = metadata !{metadata !"0x101\00size\0033554435\000", metadata !4, metadata !6, metadata !11} ; [ DW_TAG_arg_variable ] [size] [line 3]
+!15 = metadata !{metadata !"0x100\00sum\004\000", metadata !4, metadata !6, metadata !11} ; [ DW_TAG_auto_variable ] [sum] [line 4]
+!16 = metadata !{metadata !"0x100\00i\005\000", metadata !17, metadata !6, metadata !11} ; [ DW_TAG_auto_variable ] [i] [line 5]
+!17 = metadata !{metadata !"0xb\005\000\000", metadata !5, metadata !4} ; [ DW_TAG_lexical_block ] [/Volumes/Data/backedup/dev/os/llvm/debug/<stdin>]
 !18 = metadata !{i32 2, metadata !"Dwarf Version", i32 3}
 !19 = metadata !{i32 3, i32 0, metadata !4, null}
 !20 = metadata !{i32 4, i32 0, metadata !4, null}
 !21 = metadata !{i32 5, i32 0, metadata !17, null}
 !22 = metadata !{i32 6, i32 0, metadata !17, null}
 !26 = metadata !{i32 7, i32 0, metadata !4, null}
-!27 = metadata !{i32 1, metadata !"Debug Info Version", i32 1}
+!27 = metadata !{i32 1, metadata !"Debug Info Version", i32 2}