1; RUN: opt %s -passes=dce -S | FileCheck %s 2 3; Tests the salvaging of binary operators that use more than one non-constant 4; SSA value. 5 6; CHECK: #dbg_value(!DIArgList(i32 %a, i32 %b), 7; CHECK-SAME: ![[VAR_C:[0-9]+]], 8; CHECK-SAME: !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_plus, DW_OP_stack_value), 9 10; CHECK: ![[VAR_C]] = !DILocalVariable(name: "c" 11 12define i32 @"?multiply@@YAHHH@Z"(i32 %a, i32 %b) !dbg !8 { 13entry: 14 call void @llvm.dbg.value(metadata i32 %b, metadata !12, metadata !DIExpression()), !dbg !13 15 call void @llvm.dbg.value(metadata i32 %a, metadata !14, metadata !DIExpression()), !dbg !13 16 %add = add nsw i32 %a, %b, !dbg !15 17 call void @llvm.dbg.value(metadata i32 %add, metadata !16, metadata !DIExpression()), !dbg !13 18 %mul = mul nsw i32 %a, %b, !dbg !17 19 ret i32 %mul, !dbg !17 20} 21 22declare void @llvm.dbg.value(metadata, metadata, metadata) 23 24!llvm.dbg.cu = !{!0} 25!llvm.module.flags = !{!3, !4, !5, !6} 26!llvm.ident = !{!7} 27 28!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) 29!1 = !DIFile(filename: "test.cpp", directory: "/") 30!2 = !{} 31!3 = !{i32 2, !"CodeView", i32 1} 32!4 = !{i32 2, !"Debug Info Version", i32 3} 33!5 = !{i32 1, !"wchar_size", i32 2} 34!6 = !{i32 7, !"PIC Level", i32 2} 35!7 = !{!"clang version 11.0.0"} 36!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) 37!9 = !DISubroutineType(types: !10) 38!10 = !{!11, !11, !11} 39!11 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 40!12 = !DILocalVariable(name: "b", arg: 2, scope: !8, file: !1, line: 1, type: !11) 41!13 = !DILocation(line: 0, scope: !8) 42!14 = !DILocalVariable(name: "a", arg: 1, scope: !8, file: !1, line: 1, type: !11) 43!15 = !DILocation(line: 2, scope: !8) 44!16 = !DILocalVariable(name: "c", scope: !8, file: !1, line: 2, type: !11) 45!17 = !DILocation(line: 3, scope: !8) 46