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1# RUN: llc -start-before=x86-asm-printer --filetype=obj %s -o - \2# RUN: | llvm-dwarfdump -v - | FileCheck %s3#4# Generated at -O2, stopped after livedebugvalues, with some metadata removed5# by hand:6# int global;7# void ext();8# void fun(int p) {9# {10# int local = p;11# global = local;12# }13# ext();14# }15#16# The variable 'local' is available for the entirety of its enclosing scope so17# we expect to see a single location entry.18#19# Except for 'local', all DILocalVariable metadata has been removed.20#21# CHECK: DW_TAG_lexical_block [22# CHECK: DW_TAG_variable23# CHECK-NEXT: DW_AT_location [DW_FORM_exprloc] (DW_OP_reg5 RDI)24# CHECK-NEXT: DW_AT_name {{.*}} = "local"25 26--- |27 target triple = "x86_64-unknown-linux-gnu"28 @global = dso_local local_unnamed_addr global i32 0, align 4, !dbg !029 define dso_local void @fun(i32 %p) local_unnamed_addr !dbg !15 {30 entry:31 call void @llvm.dbg.value(metadata i32 %p, metadata !20, metadata !DIExpression()), !dbg !2332 store i32 %p, ptr @global, align 4, !dbg !2433 tail call void (...) @ext(), !dbg !2934 ret void, !dbg !3035 }36 37 declare !dbg !6 dso_local void @ext(...) local_unnamed_addr38 declare void @llvm.dbg.value(metadata, metadata, metadata)39 40 !llvm.dbg.cu = !{!2}41 !llvm.module.flags = !{!11, !12, !13}42 !llvm.ident = !{!14}43 44 !0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())45 !1 = distinct !DIGlobalVariable(name: "global", scope: !2, file: !3, line: 1, type: !10, isLocal: false, isDefinition: true)46 !2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 11.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, retainedTypes: !5, globals: !9, splitDebugInlining: false, nameTableKind: None)47 !3 = !DIFile(filename: "test.c", directory: "/")48 !4 = !{}49 !5 = !{!6}50 !6 = !DISubprogram(name: "ext", scope: !3, file: !3, line: 2, type: !7, spFlags: DISPFlagOptimized, retainedNodes: !4)51 !7 = !DISubroutineType(types: !8)52 !8 = !{null, null}53 !9 = !{!0}54 !10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)55 !11 = !{i32 7, !"Dwarf Version", i32 4}56 !12 = !{i32 2, !"Debug Info Version", i32 3}57 !13 = !{i32 1, !"wchar_size", i32 4}58 !14 = !{!"clang version 11.0.0"}59 !15 = distinct !DISubprogram(name: "fun", scope: !3, file: !3, line: 3, type: !16, scopeLine: 3, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !18)60 !16 = !DISubroutineType(types: !17)61 !17 = !{null, !10}62 !18 = !{!20}63 !20 = !DILocalVariable(name: "local", scope: !21, file: !3, line: 5, type: !10)64 !21 = distinct !DILexicalBlock(scope: !15, file: !3, line: 4, column: 3)65 !22 = !DILocation(line: 0, scope: !15)66 !23 = !DILocation(line: 0, scope: !21)67 !24 = !DILocation(line: 6, column: 12, scope: !21)68 !29 = !DILocation(line: 8, column: 3, scope: !15)69 !30 = !DILocation(line: 9, column: 1, scope: !15)70 71...72---73name: fun74body: |75 bb.0.entry:76 liveins: $edi77 78 DBG_VALUE $edi, $noreg, !20, !DIExpression(), debug-location !2379 MOV32mr $rip, 1, $noreg, @global, $noreg, killed renamable $edi, debug-location !24 :: (store (s32) into @global)80 dead $eax = XOR32rr undef $eax, undef $eax, implicit-def dead $eflags, implicit-def $al, debug-location !2981 TAILJMPd64 @ext, csr_64, implicit $rsp, implicit $ssp, implicit $rsp, implicit $ssp, implicit killed $al, debug-location !2982...83