1 files changed, 73 insertions, 0 deletions
diff --git a/llvm/test/DebugInfo/Generic/debug-label-opt.ll b/llvm/test/DebugInfo/Generic/debug-label-opt.ll
new file mode 100644
index 00000000000..de08f1443d1
--- /dev/null
+++ b/llvm/test/DebugInfo/Generic/debug-label-opt.ll
@@ -0,0 +1,73 @@
+; Test DBG_LABEL MachineInstr under optimization.
+; The test case is generated by clang with -O2 is on.
+; RUN: llc -fast-isel=false -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 !18
+; CHECKMI: DBG_LABEL "end", debug-location !20
+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
+  call void @llvm.dbg.value(metadata i32 0, metadata !15, 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.value(metadata i32 %sum.0, metadata !15, metadata !DIExpression()), !dbg !6
+  call void @llvm.dbg.label(metadata !16), !dbg !18
+  %2 = load i32, i32* %a, align 4, !dbg !6
+  %mul = mul nsw i32 %2, %sum.0, !dbg !19
+  call void @llvm.dbg.value(metadata i32 %mul, metadata !15, metadata !DIExpression()), !dbg !6
+  call void @llvm.dbg.label(metadata !17), !dbg !20
+  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, !17}
+!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 = !DILocalVariable(name: "sum", scope: !7, file: !1, line: 3, type: !10)
+!16 = !DILabel(scope: !7, name: "end_sum", file: !1, line: 10)
+!17 = !DILabel(scope: !7, name: "end", file: !1, line: 13)
+!18 = !DILocation(line: 10, column: 1, scope: !7)
+!19 = !DILocation(line: 11, column: 7, scope: !7)
+!20 = !DILocation(line: 13, column: 1, scope: !7)