| ; Test DBG_LABEL MachineInstr under optimization. |
| ; The test case is generated by clang with -O2 is on. |
| ; REQUIRES: asserts |
| ; RUN: llc -debug-only=isel %s -o /dev/null 2> %t.debug |
| ; RUN: cat %t.debug | FileCheck %s --check-prefix=CHECKMI |
| ; |
| ; CHECKMI: DBG_LABEL "end_sum", debug-location !17 |
| ; CHECKMI: DBG_LABEL "end", debug-location !19 |
| source_filename = "debug-label-opt.c" |
| |
| define i32 @foo(i32* nocapture readonly %a, i32 %n) local_unnamed_addr !dbg !7 { |
| entry: |
| call void @llvm.dbg.value(metadata i32* %a, metadata !13, metadata !DIExpression()), !dbg !6 |
| call void @llvm.dbg.value(metadata i32 %n, metadata !14, metadata !DIExpression()), !dbg !6 |
| switch i32 %n, label %end_sum [ |
| i32 2, label %end_sum.sink.split |
| i32 3, label %if.then3 |
| ], !dbg !6 |
| |
| if.then3: ; preds = %entry |
| %arrayidx4 = getelementptr inbounds i32, i32* %a, i64 1, !dbg !6 |
| br label %end_sum.sink.split, !dbg !6 |
| |
| end_sum.sink.split: ; preds = %entry, %if.then3 |
| %a.sink = phi i32* [ %arrayidx4, %if.then3 ], [ %a, %entry ] |
| %.sink = phi i64 [ 2, %if.then3 ], [ 1, %entry ] |
| %0 = load i32, i32* %a.sink, align 4 |
| %arrayidx1 = getelementptr inbounds i32, i32* %a, i64 %.sink |
| %1 = load i32, i32* %arrayidx1, align 4 |
| %add = add nsw i32 %1, %0 |
| br label %end_sum, !dbg !6 |
| |
| end_sum: ; preds = %end_sum.sink.split, %entry |
| %sum.0 = phi i32 [ 0, %entry ], [ %add, %end_sum.sink.split ] |
| call void @llvm.dbg.label(metadata !15), !dbg !17 |
| %2 = load i32, i32* %a, align 4, !dbg !6 |
| %mul = mul nsw i32 %2, %sum.0, !dbg !18 |
| call void @llvm.dbg.label(metadata !16), !dbg !19 |
| ret i32 %mul, !dbg !6 |
| } |
| |
| ; Function Attrs: nounwind readnone speculatable |
| declare void @llvm.dbg.label(metadata) |
| |
| ; Function Attrs: nounwind readnone speculatable |
| declare void @llvm.dbg.value(metadata, metadata, metadata) |
| |
| !llvm.dbg.cu = !{!0} |
| !llvm.module.flags = !{!3, !4, !5} |
| |
| !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2) |
| !1 = !DIFile(filename: "debug-label-opt.c", directory: "./") |
| !2 = !{} |
| !3 = !{i32 2, !"Dwarf Version", i32 4} |
| !4 = !{i32 2, !"Debug Info Version", i32 3} |
| !5 = !{i32 1, !"wchar_size", i32 4} |
| !6 = !DILocation(line: 1, column: 14, scope: !7) |
| !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) |
| !8 = !DISubroutineType(types: !9) |
| !9 = !{!10, !11, !10} |
| !10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) |
| !11 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !10, size: 64) |
| !12 = !{!13, !14, !15, !16} |
| !13 = !DILocalVariable(name: "a", arg: 1, scope: !7, file: !1, line: 1, type: !11) |
| !14 = !DILocalVariable(name: "n", arg: 2, scope: !7, file: !1, line: 1, type: !10) |
| !15 = !DILabel(scope: !7, name: "end_sum", file: !1, line: 10) |
| !16 = !DILabel(scope: !7, name: "end", file: !1, line: 13) |
| !17 = !DILocation(line: 10, column: 1, scope: !7) |
| !18 = !DILocation(line: 11, column: 7, scope: !7) |
| !19 = !DILocation(line: 13, column: 1, scope: !7) |