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1; Test bitcode writer/reader for DILabel metadata.2; RUN: llvm-as < %s | llvm-dis | llvm-as | llvm-dis | FileCheck %s3; RUN: verify-uselistorder %s4;5; CHECK: top:6; CHECK: #dbg_label([[LABEL_METADATA:![0-9]+]], 7; CHECK: distinct !DISubprogram(name: "foo", {{.*}}, retainedNodes: [[ELEMENTS:![0-9]+]])8; CHECK: [[ELEMENTS]] = !{[[LABEL_METADATA]]}9; CHECK: [[LABEL_METADATA]] = !DILabel({{.*}}, name: "top", {{.*}}, line: 4)10 11source_filename = "debug-label-bitcode.c"12 13; Function Attrs: noinline nounwind optnone14define i32 @foo(i32 signext %a, i32 signext %b) !dbg !4 {15entry:16 %a.addr = alloca i32, align 417 %b.addr = alloca i32, align 418 %sum = alloca i32, align 419 store i32 %a, ptr %a.addr, align 420 store i32 %b, ptr %b.addr, align 421 br label %top22 23top: ; preds = %entry24 call void @llvm.dbg.label(metadata !9), !dbg !1025 %0 = load i32, ptr %a.addr, align 426 %1 = load i32, ptr %b.addr, align 427 %add = add nsw i32 %0, %128 store i32 %add, ptr %sum, align 429 br label %done30 31done: ; preds = %top32 call void @llvm.dbg.label(metadata !11), !dbg !1233 %2 = load i32, ptr %sum, align 434 ret i32 %235}36 37; Function Attrs: nounwind readnone speculatable38declare void @llvm.dbg.label(metadata)39 40!llvm.dbg.cu = !{!0}41!llvm.module.flags = !{!3}42 43!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang 6.0.0", isOptimized: false, emissionKind: FullDebug, enums: !2)44!1 = !DIFile(filename: "debug-label-bitcode.c", directory: "./")45!2 = !{}46!3 = !{i32 2, !"Debug Info Version", i32 3}47!4 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 1, type: !6, isLocal: false, isDefinition: true, scopeLine: 2, isOptimized: false, unit: !0, retainedNodes: !5)48!5 = !{!9}49!6 = !DISubroutineType(types: !7)50!7 = !{!8, !8, !8}51!8 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)52!9 = !DILabel(scope: !4, name: "top", file: !1, line: 4)53!10 = !DILocation(line: 4, column: 1, scope: !4)54!11 = !DILabel(scope: !4, name: "done", file: !1, line: 7)55!12 = !DILocation(line: 7, column: 1, scope: !4)56