1; RUN: opt %s -passes=dce -S | FileCheck %s 2 3; Tests the results of salvaging variadic dbg.values that use the same SSA value 4; 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 !15 19 %add2 = add nsw i32 %a, %b, !dbg !15 20 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 !13 21 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 !13 22 %mul = mul nsw i32 %a, %b, !dbg !17 23 ret i32 %mul, !dbg !17 24} 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