| ; RUN: llc -O0 -filetype=obj < %s > %t |
| ; RUN: llvm-dwarfdump -v -debug-info %t | FileCheck %s |
| |
| ; Check that any type can have a vtable holder. |
| ; CHECK: [[SP:.*]]: DW_TAG_structure_type |
| ; CHECK-NOT: TAG |
| ; CHECK: DW_AT_containing_type [DW_FORM_ref4] ({{.*}} "f64") |
| ; CHECK: DW_AT_name [DW_FORM_strp] {{.*}}= "vtable") |
| |
| ; This was compiled using |
| ; rustc -g --emit=llvm-ir t2.rs |
| ; ... and then edited by hand, because rustc is using a somewhat older llvm. |
| ; |
| ; t2.rs is: |
| ; |
| ; // trait object test case |
| ; |
| ; pub trait T { |
| ; } |
| ; |
| ; impl T for f64 { |
| ; } |
| ; |
| ; pub fn main() { |
| ; let tu = &23.0f64 as &T; |
| ; } |
| ; t2.rs ends here ^^^ |
| |
| ; ModuleID = 't2.cgu-0.rs' |
| source_filename = "t2.cgu-0.rs" |
| target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" |
| target triple = "x86_64-unknown-linux-gnu" |
| |
| @ref.0 = internal unnamed_addr constant double 2.300000e+01, align 8 |
| @vtable.1 = internal unnamed_addr constant { void (double*)*, i64, i64 } { void (double*)* @_ZN4core3ptr13drop_in_place17h2818a933abde117eE, i64 8, i64 8 }, align 8, !dbg !0 |
| @__rustc_debug_gdb_scripts_section__ = linkonce_odr unnamed_addr constant [34 x i8] c"\01gdb_load_rust_pretty_printers.py\00", section ".debug_gdb_scripts", align 1 |
| |
| ; core::ptr::drop_in_place |
| ; Function Attrs: uwtable |
| define internal void @_ZN4core3ptr13drop_in_place17h2818a933abde117eE(double*) unnamed_addr #0 !dbg !11 { |
| start: |
| %arg0 = alloca double* |
| store double* %0, double** %arg0 |
| call void @llvm.dbg.declare(metadata double** %arg0, metadata !20, metadata !22), !dbg !23 |
| ret void, !dbg !24 |
| } |
| |
| ; t2::main |
| ; Function Attrs: uwtable |
| define internal void @_ZN2t24main17h6319e6ac7de3a097E() unnamed_addr #0 !dbg !25 { |
| start: |
| %tu = alloca { i8*, void (i8*)** } |
| call void @llvm.dbg.declare(metadata { i8*, void (i8*)** }* %tu, metadata !29, metadata !22), !dbg !37 |
| %0 = getelementptr inbounds { i8*, void (i8*)** }, { i8*, void (i8*)** }* %tu, i32 0, i32 0, !dbg !37 |
| store i8* bitcast (double* @ref.0 to i8*), i8** %0, !dbg !37 |
| %1 = getelementptr inbounds { i8*, void (i8*)** }, { i8*, void (i8*)** }* %tu, i32 0, i32 1, !dbg !37 |
| store void (i8*)** bitcast ({ void (double*)*, i64, i64 }* @vtable.1 to void (i8*)**), void (i8*)*** %1, !dbg !37 |
| ret void, !dbg !38 |
| } |
| |
| ; Function Attrs: nounwind readnone |
| declare void @llvm.dbg.declare(metadata, metadata, metadata) #1 |
| |
| define i32 @main(i32, i8**) unnamed_addr #2 { |
| top: |
| %2 = load volatile i8, i8* getelementptr inbounds ([34 x i8], [34 x i8]* @__rustc_debug_gdb_scripts_section__, i32 0, i32 0), align 1 |
| %3 = sext i32 %0 to i64 |
| ; call std::rt::lang_start |
| %4 = call i64 @_ZN3std2rt10lang_start17h2626caf1112a00beE(void ()* @_ZN2t24main17h6319e6ac7de3a097E, i64 %3, i8** %1) |
| %5 = trunc i64 %4 to i32 |
| ret i32 %5 |
| } |
| |
| ; std::rt::lang_start |
| declare i64 @_ZN3std2rt10lang_start17h2626caf1112a00beE(void ()*, i64, i8**) unnamed_addr #3 |
| |
| attributes #0 = { uwtable "frame-pointer"="all" "probe-stack"="__rust_probestack" } |
| attributes #1 = { nounwind readnone } |
| attributes #2 = { "frame-pointer"="all" } |
| attributes #3 = { "frame-pointer"="all" "probe-stack"="__rust_probestack" } |
| |
| !llvm.module.flags = !{!6, !7} |
| !llvm.dbg.cu = !{!8} |
| |
| !0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression()) |
| !1 = distinct !DIGlobalVariable(name: "vtable", scope: null, file: !2, type: !3, isLocal: true, isDefinition: true) |
| !2 = !DIFile(filename: "<unknown>", directory: "") |
| !3 = !DICompositeType(tag: DW_TAG_structure_type, name: "vtable", file: !2, size: 64, align: 64, flags: DIFlagArtificial, elements: !4, vtableHolder: !5, identifier: "vtable") |
| !4 = !{} |
| !5 = !DIBasicType(name: "f64", size: 64, encoding: DW_ATE_float) |
| !6 = !{i32 1, !"PIE Level", i32 2} |
| !7 = !{i32 2, !"Debug Info Version", i32 3} |
| !8 = distinct !DICompileUnit(language: DW_LANG_Rust, file: !9, producer: "clang LLVM (rustc version 1.22.0-dev)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !10) |
| !9 = !DIFile(filename: "t2.rs", directory: "/home/tromey/Rust") |
| !10 = !{!0} |
| !11 = distinct !DISubprogram(name: "drop_in_place<f64>", linkageName: "_ZN4core3ptr18drop_in_place<f64>E", scope: !13, file: !12, line: 59, type: !15, isLocal: false, isDefinition: true, scopeLine: 59, flags: DIFlagPrototyped, isOptimized: false, unit: !8, templateParams: !18, retainedNodes: !4) |
| !12 = !DIFile(filename: "/home/tromey/Rust/rust/src/libcore/ptr.rs", directory: "") |
| !13 = !DINamespace(name: "ptr", scope: !14) |
| !14 = !DINamespace(name: "core", scope: null) |
| !15 = !DISubroutineType(types: !16) |
| !16 = !{null, !17} |
| !17 = !DIDerivedType(tag: DW_TAG_pointer_type, name: "*mut f64", baseType: !5, size: 64, align: 64) |
| !18 = !{!19} |
| !19 = !DITemplateTypeParameter(name: "T", type: !5) |
| !20 = !DILocalVariable(arg: 1, scope: !11, file: !21, line: 1, type: !17) |
| !21 = !DIFile(filename: "t2.rs", directory: "") |
| !22 = !DIExpression() |
| !23 = !DILocation(line: 1, scope: !11) |
| !24 = !DILocation(line: 59, scope: !11) |
| !25 = distinct !DISubprogram(name: "main", linkageName: "_ZN2t24mainE", scope: !26, file: !9, line: 9, type: !27, scopeLine: 9, flags: DIFlagPrototyped, spFlags: DISPFlagLocalToUnit | DISPFlagDefinition | DISPFlagMainSubprogram, isOptimized: false, unit: !8, templateParams: !4, retainedNodes: !4) |
| !26 = !DINamespace(name: "t2", scope: null) |
| !27 = !DISubroutineType(types: !28) |
| !28 = !{null} |
| !29 = !DILocalVariable(name: "tu", scope: !30, file: !9, line: 10, type: !31, align: 8) |
| !30 = distinct !DILexicalBlock(scope: !25, file: !9, line: 10, column: 4) |
| !31 = !DICompositeType(tag: DW_TAG_structure_type, name: "&T", scope: !26, file: !2, size: 128, align: 64, elements: !32, identifier: "b9f642b757d8ad3984c1e721e3ce6016d14d9322") |
| !32 = !{!33, !36} |
| !33 = !DIDerivedType(tag: DW_TAG_member, name: "pointer", scope: !31, file: !2, baseType: !34, size: 64, align: 64, flags: DIFlagArtificial) |
| !34 = !DIDerivedType(tag: DW_TAG_pointer_type, name: "*const u8", baseType: !35, size: 64, align: 64) |
| !35 = !DIBasicType(name: "u8", size: 8, encoding: DW_ATE_unsigned) |
| !36 = !DIDerivedType(tag: DW_TAG_member, name: "vtable", scope: !31, file: !2, baseType: !34, size: 64, align: 64, offset: 64, flags: DIFlagArtificial) |
| !37 = !DILocation(line: 10, scope: !30) |
| !38 = !DILocation(line: 11, scope: !25) |