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1; Test DBG_LABEL MachineInstr under optimization.2; The test case is generated by clang with -O2 is on.3; REQUIRES: asserts4; RUN: llc -debug-only=isel %s -o /dev/null 2> %t.debug5; RUN: cat %t.debug | FileCheck %s --check-prefix=CHECKMI6;7; CHECKMI: DBG_LABEL "end_sum", debug-location !178; CHECKMI: DBG_LABEL "end", debug-location !199source_filename = "debug-label-opt.c"10 11define i32 @foo(ptr nocapture readonly %a, i32 %n) local_unnamed_addr !dbg !7 {12entry:13 call void @llvm.dbg.value(metadata ptr %a, metadata !13, metadata !DIExpression()), !dbg !614 call void @llvm.dbg.value(metadata i32 %n, metadata !14, metadata !DIExpression()), !dbg !615 switch i32 %n, label %end_sum [16 i32 2, label %end_sum.sink.split17 i32 3, label %if.then318 ], !dbg !619 20if.then3: ; preds = %entry21 %arrayidx4 = getelementptr inbounds i32, ptr %a, i64 1, !dbg !622 br label %end_sum.sink.split, !dbg !623 24end_sum.sink.split: ; preds = %entry, %if.then325 %a.sink = phi ptr [ %arrayidx4, %if.then3 ], [ %a, %entry ]26 %.sink = phi i64 [ 2, %if.then3 ], [ 1, %entry ]27 %0 = load i32, ptr %a.sink, align 428 %arrayidx1 = getelementptr inbounds i32, ptr %a, i64 %.sink29 %1 = load i32, ptr %arrayidx1, align 430 %add = add nsw i32 %1, %031 br label %end_sum, !dbg !632 33end_sum: ; preds = %end_sum.sink.split, %entry34 %sum.0 = phi i32 [ 0, %entry ], [ %add, %end_sum.sink.split ]35 call void @llvm.dbg.label(metadata !15), !dbg !1736 %2 = load i32, ptr %a, align 4, !dbg !637 %mul = mul nsw i32 %2, %sum.0, !dbg !1838 call void @llvm.dbg.label(metadata !16), !dbg !1939 ret i32 %mul, !dbg !640}41 42; Function Attrs: nounwind readnone speculatable43declare void @llvm.dbg.label(metadata)44 45; Function Attrs: nounwind readnone speculatable46declare void @llvm.dbg.value(metadata, metadata, metadata)47 48!llvm.dbg.cu = !{!0}49!llvm.module.flags = !{!3, !4, !5}50 51!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)52!1 = !DIFile(filename: "debug-label-opt.c", directory: "./")53!2 = !{}54!3 = !{i32 2, !"Dwarf Version", i32 4}55!4 = !{i32 2, !"Debug Info Version", i32 3}56!5 = !{i32 1, !"wchar_size", i32 4}57!6 = !DILocation(line: 1, column: 14, scope: !7)58!7 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 1, type: !8, isLocal: false, isDefinition: true, scopeLine: 2, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !12)59!8 = !DISubroutineType(types: !9)60!9 = !{!10, !11, !10}61!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)62!11 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !10, size: 64)63!12 = !{!13, !14, !15, !16}64!13 = !DILocalVariable(name: "a", arg: 1, scope: !7, file: !1, line: 1, type: !11)65!14 = !DILocalVariable(name: "n", arg: 2, scope: !7, file: !1, line: 1, type: !10)66!15 = !DILabel(scope: !7, name: "end_sum", file: !1, line: 10)67!16 = !DILabel(scope: !7, name: "end", file: !1, line: 13)68!17 = !DILocation(line: 10, column: 1, scope: !7)69!18 = !DILocation(line: 11, column: 7, scope: !7)70!19 = !DILocation(line: 13, column: 1, scope: !7)71