1 ; Test DBG_LABEL MachineInstr under optimization. 2 ; The test case is generated by clang with -O2 is on. 3 ; REQUIRES: asserts 4 ; RUN: llc -fast-isel=false -debug-only=isel %s -o /dev/null 2> %t.debug 5 ; RUN: cat %t.debug | FileCheck %s --check-prefix=CHECKMI 6 ; 7 ; CHECKMI: DBG_LABEL "end_sum", debug-location !17 8 ; CHECKMI: DBG_LABEL "end", debug-location !19 9 source_filename = "debug-label-opt.c" 10 11 define i32 @foo(i32* nocapture readonly %a, i32 %n) local_unnamed_addr !dbg !7 { 12 entry: 13 call void @llvm.dbg.value(metadata i32* %a, metadata !13, metadata !DIExpression()), !dbg !6 14 call void @llvm.dbg.value(metadata i32 %n, metadata !14, metadata !DIExpression()), !dbg !6 15 switch i32 %n, label %end_sum [ 16 i32 2, label %end_sum.sink.split 17 i32 3, label %if.then3 18 ], !dbg !6 19 20 if.then3: ; preds = %entry 21 %arrayidx4 = getelementptr inbounds i32, i32* %a, i64 1, !dbg !6 22 br label %end_sum.sink.split, !dbg !6 23 24 end_sum.sink.split: ; preds = %entry, %if.then3 25 %a.sink = phi i32* [ %arrayidx4, %if.then3 ], [ %a, %entry ] 26 %.sink = phi i64 [ 2, %if.then3 ], [ 1, %entry ] 27 %0 = load i32, i32* %a.sink, align 4 28 %arrayidx1 = getelementptr inbounds i32, i32* %a, i64 %.sink 29 %1 = load i32, i32* %arrayidx1, align 4 30 %add = add nsw i32 %1, %0 31 br label %end_sum, !dbg !6 32 33 end_sum: ; preds = %end_sum.sink.split, %entry 34 %sum.0 = phi i32 [ 0, %entry ], [ %add, %end_sum.sink.split ] 35 call void @llvm.dbg.label(metadata !15), !dbg !17 36 %2 = load i32, i32* %a, align 4, !dbg !6 37 %mul = mul nsw i32 %2, %sum.0, !dbg !18 38 call void @llvm.dbg.label(metadata !16), !dbg !19 39 ret i32 %mul, !dbg !6 40 } 41 42 ; Function Attrs: nounwind readnone speculatable 43 declare void @llvm.dbg.label(metadata) 44 45 ; Function Attrs: nounwind readnone speculatable 46 declare 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
