1; RUN: opt -S -passes=instcombine %s -o - | FileCheck %s 2 3; For performance reasons, we currently limit the number of values that can be 4; referenced by a dbg.value to 16. This test checks that we do not exceed this 5; limit during salvaging. 6 7; CHECK: DIArgList(i32 poison 8; CHECK-NOT: DW_OP_LLVM_arg, 16 9 10target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" 11target triple = "x86_64-unknown-linux-gnu" 12 13define i32 @_Z3foov() local_unnamed_addr !dbg !9 { 14entry: 15 %call = call i32 @_Z3barv(), !dbg !14 16 %call1 = call i32 @_Z3barv(), !dbg !14 17 %add = add nsw i32 %call, %call1, !dbg !14 18 %call2 = call i32 @_Z3barv(), !dbg !14 19 %call4 = call i32 @_Z3barv(), !dbg !14 20 %call6 = call i32 @_Z3barv(), !dbg !14 21 %call8 = call i32 @_Z3barv(), !dbg !14 22 %call10 = call i32 @_Z3barv(), !dbg !14 23 %call12 = call i32 @_Z3barv(), !dbg !14 24 %call14 = call i32 @_Z3barv(), !dbg !14 25 %call16 = call i32 @_Z3barv(), !dbg !14 26 %call18 = call i32 @_Z3barv(), !dbg !14 27 %call20 = call i32 @_Z3barv(), !dbg !14 28 %call22 = call i32 @_Z3barv(), !dbg !14 29 %call24 = call i32 @_Z3barv(), !dbg !14 30 %call26 = call i32 @_Z3barv(), !dbg !14 31 %call28 = call i32 @_Z3barv(), !dbg !14 32 %call30 = call i32 @_Z3barv(), !dbg !14 33 call void @llvm.dbg.value(metadata !DIArgList(i32 %add, i32 %call30, i32 %call28, i32 %call26, i32 %call24, i32 %call22, i32 %call20, i32 %call18, i32 %call16, i32 %call14, i32 %call12, i32 %call10, i32 %call8, i32 %call6, i32 %call4, i32 %call2), metadata !15, metadata !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 15, DW_OP_plus, DW_OP_LLVM_arg, 14, DW_OP_plus, DW_OP_LLVM_arg, 13, DW_OP_plus, DW_OP_LLVM_arg, 12, DW_OP_plus, DW_OP_LLVM_arg, 11, DW_OP_plus, DW_OP_LLVM_arg, 10, DW_OP_plus, DW_OP_LLVM_arg, 9, DW_OP_plus, DW_OP_LLVM_arg, 8, DW_OP_plus, DW_OP_LLVM_arg, 7, DW_OP_plus, DW_OP_LLVM_arg, 6, DW_OP_plus, DW_OP_LLVM_arg, 5, DW_OP_plus, DW_OP_LLVM_arg, 4, DW_OP_plus, DW_OP_LLVM_arg, 3, DW_OP_plus, DW_OP_LLVM_arg, 2, DW_OP_plus, DW_OP_LLVM_arg, 1, DW_OP_plus, DW_OP_stack_value)), !dbg !16 34 %call32 = call i32 @_Z3barv(), !dbg !17 35 ret i32 %call32, !dbg !17 36} 37 38declare dso_local i32 @_Z3barv() local_unnamed_addr 39 40declare void @llvm.dbg.value(metadata, metadata, metadata) 41 42!llvm.dbg.cu = !{!0} 43!llvm.module.flags = !{!3, !4, !5, !6, !7} 44!llvm.ident = !{!8} 45 46!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 13.0.0", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None) 47!1 = !DIFile(filename: "limit-arglist-size.cpp", directory: "/") 48!2 = !{} 49!3 = !{i32 7, !"Dwarf Version", i32 4} 50!4 = !{i32 2, !"Debug Info Version", i32 3} 51!5 = !{i32 1, !"wchar_size", i32 4} 52!6 = !{i32 7, !"uwtable", i32 1} 53!7 = !{i32 7, !"frame-pointer", i32 2} 54!8 = !{!"clang version 13.0.0"} 55!9 = distinct !DISubprogram(name: "foo", linkageName: "_Z3foov", scope: !10, file: !10, line: 3, type: !11, scopeLine: 3, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2) 56!10 = !DIFile(filename: "./limit-arglist-size.cpp", directory: "/") 57!11 = !DISubroutineType(types: !12) 58!12 = !{!13} 59!13 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 60!14 = !DILocation(line: 4, scope: !9) 61!15 = !DILocalVariable(name: "v16", scope: !9, file: !10, line: 4, type: !13) 62!16 = !DILocation(line: 0, scope: !9) 63!17 = !DILocation(line: 5, scope: !9) 64