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1; RUN: llc -verify-machineinstrs < %s | FileCheck %s2; RUN: llc -filetype=obj %s -o - | llvm-dwarfdump - | FileCheck %s --check-prefix DWARF3 4; Input C code:5 6; int i = input(); // Nested case7; int j = input(); // Trivial def-use.8; output(i, j);9 10; The ll below generates 330 lines of .S, so relevant parts that the11; WebAssemblyDebugFixup pass affects:12 13; CHECK: call input14; CHECK: .Ltmp0:15; CHECK: call input16; CHECK: .Ltmp1:17; CHECK: call output18; CHECK: .Ltmp2:19 20; This defines variable "i" which is live on the stack between Ltmp0 and Ltmp2,21; 2 = TI_OPERAND_STACK and 0 = stack offset.22 23; CHECK: .section .debug_loc,"",@24; CHECK: .Ldebug_loc0:25; CHECK: .int32 .Ltmp0-.Lfunc_begin026; CHECK: .int32 .Ltmp2-.Lfunc_begin027; CHECK: .int16 4 # Loc expr size28; CHECK: .int8 237 # DW_OP_WASM_location29; CHECK: .int8 2 # 230; CHECK: .int8 0 # 031; CHECK: .int8 159 # DW_OP_stack_value32 33; This defines variable "j" which is live on the stack between Ltmp1 and Ltmp2,34; 2 = TI_OPERAND_STACK and 1 = stack offset.35 36; CHECK: .Ldebug_loc1:37; CHECK: .int32 .Ltmp1-.Lfunc_begin038; CHECK: .int32 .Ltmp2-.Lfunc_begin039; CHECK: .int16 4 # Loc expr size40; CHECK: .int8 237 # DW_OP_WASM_location41; CHECK: .int8 2 # 242; CHECK: .int8 1 # 143; CHECK: .int8 159 # DW_OP_stack_value44 45 46source_filename = "stackified.c"47target triple = "wasm32-unknown-unknown"48 49define void @foo() !dbg !12 {50entry:51 %call = call i32 @input(), !dbg !1852 call void @llvm.dbg.value(metadata i32 %call, metadata !16, metadata !DIExpression()), !dbg !1953 %call1 = call i32 @input(), !dbg !2054 call void @llvm.dbg.value(metadata i32 %call1, metadata !17, metadata !DIExpression()), !dbg !1955 call void @output(i32 %call, i32 %call1), !dbg !2156 ret void, !dbg !2257}58 59; DebugFixup pass should not add a DBG_VALUE after the BR_IF instruction at the60; end of the 'entry' BB, because it is not allowed to have more instructions61; after a terminator and debug ranges are terminated at the end of a BB anyway.62; If this passes 'llc -verify-machineinstrs', that means the DBG_VALUE63; instruction is correctly omitted.64 65; DWARF-LABEL: DW_AT_name ("no_dbg_value_after_terminator")66; DWARF: DW_TAG_variable67; DWARF-NEXT: DW_AT_location68; DWARF-NEXT: [69; DWARF-NEXT: DW_AT_name ("myvar")70define void @no_dbg_value_after_terminator(i32 %a, i32 %b) !dbg !23 {71entry:72 %cmp = icmp ne i32 %a, %b, !dbg !2573 call void @llvm.dbg.value(metadata i1 %cmp, metadata !27, metadata !DIExpression(DW_OP_LLVM_convert, 1, DW_ATE_unsigned, DW_OP_LLVM_convert, 8, DW_ATE_unsigned, DW_OP_stack_value)), !dbg !2574 br i1 %cmp, label %bb.1, label %bb.0, !dbg !2575 76bb.0: ; preds = %entry77 unreachable78 79bb.1: ; preds = %entry80 ret void81}82 83declare i32 @input()84declare !dbg !4 void @output(i32, i32)85declare void @llvm.dbg.value(metadata, metadata, metadata)86 87!llvm.dbg.cu = !{!0}88!llvm.module.flags = !{!8, !9, !10}89!llvm.ident = !{!11}90 91!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 11.0.0 (https://github.com/llvm/llvm-project.git ed7aaf832444411ce93aa0443425ce401f5c7a8e)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !3, nameTableKind: None)92!1 = !DIFile(filename: "stackified.c", directory: "C:\\stuff\\llvm-project")93!2 = !{}94!3 = !{!4}95!4 = !DISubprogram(name: "output", scope: !1, file: !1, line: 2, type: !5, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !2)96!5 = !DISubroutineType(types: !6)97!6 = !{null, !7, !7}98!7 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)99!8 = !{i32 7, !"Dwarf Version", i32 4}100!9 = !{i32 2, !"Debug Info Version", i32 3}101!10 = !{i32 1, !"wchar_size", i32 4}102!11 = !{!"clang version 11.0.0 (https://github.com/llvm/llvm-project.git ed7aaf832444411ce93aa0443425ce401f5c7a8e)"}103!12 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 3, type: !13, scopeLine: 3, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !15)104!13 = !DISubroutineType(types: !14)105!14 = !{null}106!15 = !{!16, !17}107!16 = !DILocalVariable(name: "i", scope: !12, file: !1, line: 4, type: !7)108!17 = !DILocalVariable(name: "j", scope: !12, file: !1, line: 5, type: !7)109!18 = !DILocation(line: 4, column: 11, scope: !12)110!19 = !DILocation(line: 0, scope: !12)111!20 = !DILocation(line: 5, column: 11, scope: !12)112!21 = !DILocation(line: 6, column: 3, scope: !12)113!22 = !DILocation(line: 7, column: 1, scope: !12)114!23 = distinct !DISubprogram(name: "no_dbg_value_after_terminator", scope: null, type: !24, spFlags: DISPFlagDefinition, unit: !0)115!24 = !DISubroutineType(types: !2)116!25 = !DILocation(line: 0, scope: !26)117!26 = distinct !DILexicalBlock(scope: !23)118!27 = !DILocalVariable(name: "myvar", scope: !26, type: !28)119!28 = !DIBasicType(name: "bool", size: 8, encoding: DW_ATE_boolean)120