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1; RUN: opt %s -passes=dce -S | FileCheck %s2 3; Tests the results of salvaging variadic dbg.values that use the same SSA value4; multiple times.5 6; CHECK: #dbg_value(!DIArgList(i32 %a, i32 %a),7; CHECK-SAME: ![[VAR_C:[0-9]+]],8; CHECK-SAME: !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_plus_uconst, 5, DW_OP_LLVM_arg, 1, DW_OP_plus_uconst, 5, DW_OP_plus, DW_OP_stack_value),9 10; CHECK: #dbg_value(!DIArgList(i32 %a, i32 %a, i32 %b, i32 %b),11; CHECK-SAME: ![[VAR_C]],12; CHECK-SAME: !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 2, DW_OP_plus, DW_OP_LLVM_arg, 1, DW_OP_LLVM_arg, 3, DW_OP_plus, DW_OP_plus, DW_OP_stack_value),13 14; CHECK: ![[VAR_C]] = !DILocalVariable(name: "c"15 16define i32 @"?multiply@@YAHHH@Z"(i32 %a, i32 %b) !dbg !8 {17entry:18 %add1 = add nsw i32 %a, 5, !dbg !1519 %add2 = add nsw i32 %a, %b, !dbg !1520 call void @llvm.dbg.value(metadata !DIArgList(i32 %add1, i32 %add1), metadata !16, metadata !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_plus, DW_OP_stack_value)), !dbg !1321 call void @llvm.dbg.value(metadata !DIArgList(i32 %add2, i32 %add2), metadata !16, metadata !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_plus, DW_OP_stack_value)), !dbg !1322 %mul = mul nsw i32 %a, %b, !dbg !1723 ret i32 %mul, !dbg !1724}25 26declare void @llvm.dbg.value(metadata, metadata, metadata)27 28!llvm.dbg.cu = !{!0}29!llvm.module.flags = !{!3, !4, !5, !6}30!llvm.ident = !{!7}31 32!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, producer: "clang version 11.0.0", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None)33!1 = !DIFile(filename: "test.cpp", directory: "/")34!2 = !{}35!3 = !{i32 2, !"CodeView", i32 1}36!4 = !{i32 2, !"Debug Info Version", i32 3}37!5 = !{i32 1, !"wchar_size", i32 2}38!6 = !{i32 7, !"PIC Level", i32 2}39!7 = !{!"clang version 11.0.0"}40!8 = distinct !DISubprogram(name: "multiply", linkageName: "?multiply@@YAHHH@Z", scope: !1, file: !1, line: 1, type: !9, scopeLine: 1, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2)41!9 = !DISubroutineType(types: !10)42!10 = !{!11, !11, !11}43!11 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)44!12 = !DILocalVariable(name: "b", arg: 2, scope: !8, file: !1, line: 1, type: !11)45!13 = !DILocation(line: 0, scope: !8)46!14 = !DILocalVariable(name: "a", arg: 1, scope: !8, file: !1, line: 1, type: !11)47!15 = !DILocation(line: 2, scope: !8)48!16 = !DILocalVariable(name: "c", scope: !8, file: !1, line: 2, type: !11)49!17 = !DILocation(line: 3, scope: !8)50