DebugInfo: Don't emit .debug_names entries for split-dwarf-inlining info

Author: dwblaikie

llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp

@@ -3564,7 +3564,8 @@ void DwarfDebug::addAccelNameImpl(
     const DwarfUnit &Unit,
     const DICompileUnit::DebugNameTableKind NameTableKind,
     AccelTable<DataT> &AppleAccel, StringRef Name, const DIE &Die) {
-  if (getAccelTableKind() == AccelTableKind::None || Name.empty())
+  if (getAccelTableKind() == AccelTableKind::None ||
+      Unit.getUnitDie().getTag() == dwarf::DW_TAG_skeleton_unit || Name.empty())
     return;
 
   if (getAccelTableKind() != AccelTableKind::Apple &&

llvm/test/DebugInfo/X86/debug-names-split-dwarf-inlining.ll

@@ -0,0 +1,84 @@
+; RUN: rm -rf %t && split-file %s %t && cd %t
+; RUN: llc -filetype=obj -o - a.ll -split-dwarf-file=foo.dwo \
+; RUN:     | llvm-dwarfdump - -debug-names -debug-info \
+; RUN:     | FileCheck --implicit-check-not=contents: %s
+
+; CHECK: .debug_info contents:
+; CHECK: .debug_info.dwo contents:
+; CHECK: DW_TAG_subprogram
+; CHECK: [[F3_DEF:0x[0-9a-f]*]]: DW_TAG_subprogram
+; CHECK-NOT: DW_TAG
+; CHECK: DW_AT_name ("f3")
+; CHECK-NOT: DW_TAG
+; CHECK: [[F2_INL:0x[0-9a-f]*]]:   DW_TAG_inlined_subroutine
+; CHECK-NOT: DW_TAG
+; CHECK:     DW_AT_abstract_origin ({{.*}} "_Z2f2v")
+; CHECK: .debug_names contents:
+; CHECK: String: {{.*}} "f2"
+; CHECK: Entry {{.*}}{
+; CHECK-NOT: {{^ *}}Entry
+; CHECK:   Tag: DW_TAG_inlined_subroutine
+; CHECK-NOT: {{^ *}}Entry
+; CHECK:   DW_IDX_die_offset: [[F2_INL]]
+; CHECK-NOT: {{^ *}}Entry
+; CHECK: }
+; CHECK-NEXT: }
+; CHECK: String: {{.*}} "f3"
+; CHECK: Entry {{.*}}{
+; CHECK-NOT: {{^ *}}Entry
+; CHECK:   Tag: DW_TAG_subprogram
+; CHECK-NOT: {{^ *}}Entry
+; CHECK:   DW_IDX_die_offset: [[F3_DEF]]
+; CHECK-NOT: {{^ *}}Entry
+; CHECK: }
+; CHECK-NEXT: }
+
+;--- a.cc
+void f1();
+inline void f2() {
+  f1();
+}
+void f3() {
+  f2();
+}
+;--- gen
+clang++ --target=x86_64-linux -S -emit-llvm -O3 -g -fsplit-dwarf-inlining -c \
+		 -gpubnames a.cc -o -
+
+;--- a.ll
+; ModuleID = 'a.cc'
+source_filename = "a.cc"
+target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-unknown-linux"
+
+; Function Attrs: mustprogress uwtable
+define dso_local void @_Z2f3v() local_unnamed_addr #0 !dbg !8 {
+entry:
+  tail call void @_Z2f1v(), !dbg !11
+  ret void, !dbg !14
+}
+
+declare !dbg !15 void @_Z2f1v() local_unnamed_addr #1
+
+attributes #0 = { mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
+attributes #1 = { "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
+
+!llvm.dbg.cu = !{!0}
+!llvm.module.flags = !{!2, !3, !4, !5, !6, !7}
+
+!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug)
+!1 = !DIFile(filename: "a.cc", directory: "/proc/self/cwd", checksumkind: CSK_MD5, checksum: "661bc2c3d7df6cc69861afc8fb17bf16")
+!2 = !{i32 7, !"Dwarf Version", i32 5}
+!3 = !{i32 2, !"Debug Info Version", i32 3}
+!4 = !{i32 1, !"wchar_size", i32 4}
+!5 = !{i32 8, !"PIC Level", i32 2}
+!6 = !{i32 7, !"PIE Level", i32 2}
+!7 = !{i32 7, !"uwtable", i32 2}
+!8 = distinct !DISubprogram(name: "f3", linkageName: "_Z2f3v", scope: !1, file: !1, line: 5, type: !9, scopeLine: 5, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0)
+!9 = !DISubroutineType(types: !10)
+!10 = !{null}
+!11 = !DILocation(line: 3, column: 3, scope: !12, inlinedAt: !13)
+!12 = distinct !DISubprogram(name: "f2", linkageName: "_Z2f2v", scope: !1, file: !1, line: 2, type: !9, scopeLine: 2, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0)
+!13 = distinct !DILocation(line: 6, column: 3, scope: !8)
+!14 = !DILocation(line: 7, column: 1, scope: !8)
+!15 = !DISubprogram(name: "f1", linkageName: "_Z2f1v", scope: !1, file: !1, line: 1, type: !9, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized)