[llvm] [DebugInfo] Add num_extra_inhabitants to debug info (PR #112590)

[Paul T Robinson via llvm-commits]

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@@ -0,0 +1,30 @@
+; RUN: llc %s -filetype=obj -mtriple arm64e-apple-darwin -o - \
+; RUN:   | llvm-dwarfdump - | FileCheck %s
+
+; CHECK: DW_TAG_base_type
+; CHECK: DW_AT_APPLE_num_extra_inhabitants	(0xfe)
+
+; CHECK: DW_TAG_structure_type
+; CHECK: DW_AT_APPLE_num_extra_inhabitants	(0x42)
+target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"
+
+ at p = common global i8* null, align 8, !dbg !0
+ at q = common global i8* null, align 8, !dbg !8
+
+!llvm.dbg.cu = !{!2}
+!llvm.module.flags = !{!6, !7}
+
+!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
+!1 = distinct !DIGlobalVariable(name: "p", scope: !2, file: !3, line: 1, type: !10, isLocal: false, isDefinition: true)
+!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, emissionKind: FullDebug, globals: !5)
+!3 = !DIFile(filename: "/tmp/p.c", directory: "/")
+!4 = !{}
+!5 = !{!0, !8}
+!6 = !{i32 2, !"Dwarf Version", i32 4}
+!7 = !{i32 2, !"Debug Info Version", i32 3}
+
+!8 = !DIGlobalVariableExpression(var: !9, expr: !DIExpression())
+!9 = distinct !DIGlobalVariable(name: "q", scope: !2, file: !3, line: 1, type: !11, isLocal: false, isDefinition: true)
+!10 = !DIBasicType(name: "ExtraInhabitantBasicType", size: 1, encoding: DW_ATE_unsigned, num_extra_inhabitants: 254)
+!11 = !DICompositeType(tag: DW_TAG_structure_type, name: "ExtraInhabitantCompositeType", file: !3, size: 64, num_extra_inhabitants: 66, identifier: "MangledExtraInhabitantCompositeType")
+
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pogo59 wrote:

Please add a case showing that the new attribute is absent when num_extra_inhabitants is zero.

https://github.com/llvm/llvm-project/pull/112590