1; RUN: llc -filetype=obj %s -o - | llvm-dwarfdump - | FileCheck %s 2 3; Test that byval args get correct DWARF debug locations. 4; These end up in the callee as Wasm locals, which is atypical. 5 6; From C code: 7 8; typedef union { int x; float y; } u; 9; typedef struct { int x; float y; } s; 10; int some_func(int x, u some_union, s some_struct, int a[3]) { 11; return x + some_union.x + some_struct.x + a[0]; 12; } 13 14 15; ModuleID = 't.c' 16source_filename = "t.c" 17target triple = "wasm32-unknown-unknown" 18 19%union.u = type { i32 } 20%struct.s = type { i32, float } 21 22; Function Attrs: noinline nounwind optnone 23define hidden i32 @some_func(i32 %x, ptr byval(%union.u) align 4 %some_union, ptr byval(%struct.s) align 4 %some_struct, ptr %a) #0 !dbg !7 { 24entry: 25 %x.addr = alloca i32, align 4 26 %a.addr = alloca ptr, align 4 27 store i32 %x, ptr %x.addr, align 4 28 call void @llvm.dbg.declare(metadata ptr %x.addr, metadata !23, metadata !DIExpression()), !dbg !24 29 call void @llvm.dbg.declare(metadata ptr %some_union, metadata !25, metadata !DIExpression()), !dbg !26 30 call void @llvm.dbg.declare(metadata ptr %some_struct, metadata !27, metadata !DIExpression()), !dbg !28 31 store ptr %a, ptr %a.addr, align 4 32 call void @llvm.dbg.declare(metadata ptr %a.addr, metadata !29, metadata !DIExpression()), !dbg !30 33 %0 = load i32, ptr %x.addr, align 4, !dbg !31 34 %1 = load i32, ptr %some_union, align 4, !dbg !32 35 %add = add nsw i32 %0, %1, !dbg !33 36 %2 = load i32, ptr %some_struct, align 4, !dbg !34 37 %add3 = add nsw i32 %add, %2, !dbg !35 38 %3 = load ptr, ptr %a.addr, align 4, !dbg !36 39 %4 = load i32, ptr %3, align 4, !dbg !36 40 %add4 = add nsw i32 %add3, %4, !dbg !37 41 ret i32 %add4, !dbg !38 42} 43 44; Function Attrs: nofree nosync nounwind readnone speculatable willreturn 45declare void @llvm.dbg.declare(metadata, metadata, metadata) #1 46 47attributes #0 = { noinline nounwind optnone "disable-tail-calls"="false" "frame-pointer"="none" "less-precise-fpmad"="false" "min-legal-vector-width"="0" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="generic" "unsafe-fp-math"="false" "use-soft-float"="false" } 48attributes #1 = { nofree nosync nounwind readnone speculatable willreturn } 49 50!llvm.dbg.cu = !{!0} 51!llvm.module.flags = !{!3, !4, !5} 52!llvm.ident = !{!6} 53 54!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 12.0.0 (https://github.com/llvm/llvm-project.git eccc734a69c0c012ae3160887b65a535b35ead3e)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None) 55!1 = !DIFile(filename: "t.c", directory: "C:\\src\\llvm") 56!2 = !{} 57!3 = !{i32 7, !"Dwarf Version", i32 4} 58!4 = !{i32 2, !"Debug Info Version", i32 3} 59!5 = !{i32 1, !"wchar_size", i32 4} 60!6 = !{!"clang version 12.0.0 (https://github.com/llvm/llvm-project.git eccc734a69c0c012ae3160887b65a535b35ead3e)"} 61!7 = distinct !DISubprogram(name: "some_func", scope: !1, file: !1, line: 11, type: !8, scopeLine: 11, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2) 62!8 = !DISubroutineType(types: !9) 63!9 = !{!10, !10, !11, !17, !22} 64!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 65!11 = !DIDerivedType(tag: DW_TAG_typedef, name: "u", file: !1, line: 4, baseType: !12) 66!12 = distinct !DICompositeType(tag: DW_TAG_union_type, file: !1, line: 1, size: 32, elements: !13) 67!13 = !{!14, !15} 68!14 = !DIDerivedType(tag: DW_TAG_member, name: "x", scope: !12, file: !1, line: 2, baseType: !10, size: 32) 69!15 = !DIDerivedType(tag: DW_TAG_member, name: "y", scope: !12, file: !1, line: 3, baseType: !16, size: 32) 70!16 = !DIBasicType(name: "float", size: 32, encoding: DW_ATE_float) 71!17 = !DIDerivedType(tag: DW_TAG_typedef, name: "s", file: !1, line: 9, baseType: !18) 72!18 = distinct !DICompositeType(tag: DW_TAG_structure_type, file: !1, line: 6, size: 64, elements: !19) 73!19 = !{!20, !21} 74!20 = !DIDerivedType(tag: DW_TAG_member, name: "x", scope: !18, file: !1, line: 7, baseType: !10, size: 32) 75!21 = !DIDerivedType(tag: DW_TAG_member, name: "y", scope: !18, file: !1, line: 8, baseType: !16, size: 32, offset: 32) 76!22 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !10, size: 32) 77!23 = !DILocalVariable(name: "x", arg: 1, scope: !7, file: !1, line: 11, type: !10) 78!24 = !DILocation(line: 11, column: 19, scope: !7) 79!25 = !DILocalVariable(name: "some_union", arg: 2, scope: !7, file: !1, line: 11, type: !11) 80!26 = !DILocation(line: 11, column: 24, scope: !7) 81!27 = !DILocalVariable(name: "some_struct", arg: 3, scope: !7, file: !1, line: 11, type: !17) 82!28 = !DILocation(line: 11, column: 38, scope: !7) 83!29 = !DILocalVariable(name: "a", arg: 4, scope: !7, file: !1, line: 11, type: !22) 84!30 = !DILocation(line: 11, column: 55, scope: !7) 85!31 = !DILocation(line: 12, column: 12, scope: !7) 86!32 = !DILocation(line: 12, column: 27, scope: !7) 87!33 = !DILocation(line: 12, column: 14, scope: !7) 88!34 = !DILocation(line: 12, column: 43, scope: !7) 89!35 = !DILocation(line: 12, column: 29, scope: !7) 90!36 = !DILocation(line: 12, column: 47, scope: !7) 91!37 = !DILocation(line: 12, column: 45, scope: !7) 92!38 = !DILocation(line: 12, column: 5, scope: !7) 93 94 95 96 97; CHECK-LABEL: DW_TAG_formal_parameter 98; CHECK-NEXT: DW_AT_location (DW_OP_fbreg +12) 99; CHECK-NEXT: DW_AT_name ("x") 100 101; CHECK-LABEL: DW_TAG_formal_parameter 102; CHECK-NEXT: DW_AT_location (DW_OP_WASM_location 0x0 0x1) 103; CHECK-NEXT: DW_AT_name ("some_union") 104 105; CHECK-LABEL: DW_TAG_formal_parameter 106; CHECK-NEXT: DW_AT_location (DW_OP_WASM_location 0x0 0x2) 107; CHECK-NEXT: DW_AT_name ("some_struct") 108 109; CHECK-LABEL: DW_TAG_formal_parameter 110; CHECK-NEXT: DW_AT_location (DW_OP_fbreg +8) 111; CHECK-NEXT: DW_AT_name ("a") 112