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1; This checks cases when the 64-bit DWARF debug info should not be generated2; even if '-dwarf64' is specified.3 4; The 64-bit DWARF format was introduced in DWARFv3, so the '-dwarf64' switch5; should be ignored for earlier versions.6; RUN: llc -mtriple=x86_64 -dwarf-version=2 -dwarf64 -filetype=obj %s -o - | \7; RUN: llvm-dwarfdump -debug-line - | \8; RUN: FileCheck %s --check-prefixes=ELF64,CHECK9 10; DWARF64 requires 64-bit relocations, so it is not produced for 32-bit targets.11; RUN: llc -mtriple=i386 -dwarf-version=5 -dwarf64 -filetype=obj %s -o - | \12; RUN: llvm-dwarfdump -debug-line - | \13; RUN: FileCheck %s --check-prefixes=ELF32,CHECK14 15; DWARF64 is enabled only for ELF targets. The switch should be ignored for COFF.16; RUN: llc -mtriple=x86_64-windows-gnu -dwarf-version=5 -dwarf64 -filetype=obj %s -o - | \17; RUN: llvm-dwarfdump -debug-line - | \18; RUN: FileCheck %s --check-prefixes=COFF,CHECK19 20; DWARF64 is enabled only for ELF targets. The switch should be ignored for Mach-O.21; RUN: llc -mtriple=x86_64-apple-darwin -dwarf-version=5 -dwarf64 -filetype=obj %s -o - | \22; RUN: llvm-dwarfdump -debug-line - | \23; RUN: FileCheck %s --check-prefixes=MACHO,CHECK24 25; ELF64: file format elf64-x86-6426; ELF32: file format elf32-i38627; COFF: file format COFF-x86-6428; MACHO: file format Mach-O 64-bit x86-6429 30; CHECK: .debug_line contents:31; CHECK-NEXT: debug_line[0x00000000]32; CHECK-NEXT: Line table prologue:33; CHECK-NEXT: total_length:34; CHECK-NEXT: format: DWARF3235 36; IR generated and reduced from:37; $ cat foo.c38; int foo;39; $ clang -g -S -emit-llvm foo.c -o foo.ll40 41target triple = "x86_64-unknown-linux-gnu"42 43@foo = dso_local global i32 0, align 4, !dbg !044 45!llvm.dbg.cu = !{!2}46!llvm.module.flags = !{!7, !8, !9}47!llvm.ident = !{!10}48 49!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())50!1 = distinct !DIGlobalVariable(name: "foo", scope: !2, file: !3, line: 1, type: !6, isLocal: false, isDefinition: true)51!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 12.0.0", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5, splitDebugInlining: false, nameTableKind: None)52!3 = !DIFile(filename: "foo.c", directory: "/tmp")53!4 = !{}54!5 = !{!0}55!6 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)56!7 = !{i32 7, !"Dwarf Version", i32 4}57!8 = !{i32 2, !"Debug Info Version", i32 3}58!9 = !{i32 1, !"wchar_size", i32 4}59!10 = !{!"clang version 12.0.0"}60