117 lines · plain
1; RUN: opt -O2 %s | llvm-dis > %t12; RUN: llc -filetype=asm -o - %t1 | FileCheck -check-prefixes=CHECK %s3; RUN: llc -mattr=+alu32 -filetype=asm -o - %t1 | FileCheck -check-prefixes=CHECK %s4; Source code:5; union v1 { int a; int b; };6; typedef union v1 __v1;7; typedef int __int;8; union v3 { char c; __int d[40]; };9; typedef union v3 __v3;10; #define _(x) (__builtin_preserve_access_index(x))11; #define cast_to_v1(x) ((__v1 *)(x))12; int get_value(const int *arg);13; int test(__v3 *arg) {14; return get_value(_(&cast_to_v1(&arg->d[4])->b));15; }16; Compilation flag:17; clang -target bpf -O2 -g -S -emit-llvm -Xclang -disable-llvm-passes test.c18 19target triple = "bpf"20 21%union.v3 = type { [40 x i32] }22%union.v1 = type { i32 }23 24; Function Attrs: nounwind25define dso_local i32 @test(ptr %arg) local_unnamed_addr !dbg !19 {26entry:27 call void @llvm.dbg.value(metadata ptr %arg, metadata !30, metadata !DIExpression()), !dbg !3128 %0 = tail call ptr @llvm.preserve.union.access.index.p0.p0(ptr %arg, i32 1), !dbg !32, !llvm.preserve.access.index !2429 %d = getelementptr inbounds %union.v3, ptr %0, i64 0, i32 0, !dbg !3230 %1 = tail call ptr @llvm.preserve.array.access.index.p0.p0(ptr elementtype([40 x i32]) %d, i32 1, i32 4), !dbg !32, !llvm.preserve.access.index !1131 %2 = bitcast ptr %1 to ptr, !dbg !3232 %3 = tail call ptr @llvm.preserve.union.access.index.p0.p0(ptr %2, i32 1), !dbg !32, !llvm.preserve.access.index !633 %b = getelementptr inbounds %union.v1, ptr %3, i64 0, i32 0, !dbg !3234 %call = tail call i32 @get_value(ptr %b), !dbg !3335 ret i32 %call, !dbg !3436}37 38; CHECK: r2 = 1639; CHECK: r1 += r240; CHECK: r2 = 041; CHECK: r1 += r242; CHECK: call get_value43 44; CHECK: .long 6 # BTF_KIND_UNION(id = [[TID1:[0-9]+]])45; CHECK: .long 111 # BTF_KIND_UNION(id = [[TID2:[0-9]+]])46 47; CHECK: .ascii "v3" # string offset=648; CHECK: .ascii ".text" # string offset=5749; CHECK: .ascii "0:1:4" # string offset=6350; CHECK: .ascii "v1" # string offset=11151; CHECK: .ascii "0:1" # string offset=11852 53; CHECK: .long 16 # FieldReloc54; CHECK-NEXT: .long 57 # Field reloc section string offset=5755; CHECK-NEXT: .long 256; CHECK-NEXT: .long .Ltmp{{[0-9]+}}57; CHECK-NEXT: .long [[TID1]]58; CHECK-NEXT: .long 6359; CHECK-NEXT: .long 060; CHECK-NEXT: .long .Ltmp{{[0-9]+}}61; CHECK-NEXT: .long [[TID2]]62; CHECK-NEXT: .long 11863; CHECK-NEXT: .long 064 65declare dso_local i32 @get_value(ptr) local_unnamed_addr66 67; Function Attrs: nounwind readnone68declare ptr @llvm.preserve.union.access.index.p0.p0(ptr, i32)69 70; Function Attrs: nounwind readnone71declare ptr @llvm.preserve.array.access.index.p0.p0(ptr, i32, i32)72 73; Function Attrs: nounwind readnone74 75; Function Attrs: nounwind readnone speculatable willreturn76declare void @llvm.dbg.value(metadata, metadata, metadata)77 78!llvm.dbg.cu = !{!0}79!llvm.module.flags = !{!15, !16, !17}80!llvm.ident = !{!18}81 82!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 10.0.0 (trunk 367256) (llvm/trunk 367266)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !3, nameTableKind: None)83!1 = !DIFile(filename: "test.c", directory: "/tmp/home/yhs/work/tests/llvm/cast")84!2 = !{}85!3 = !{!4, !11}86!4 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !5, size: 64)87!5 = !DIDerivedType(tag: DW_TAG_typedef, name: "__v1", file: !1, line: 2, baseType: !6)88!6 = distinct !DICompositeType(tag: DW_TAG_union_type, name: "v1", file: !1, line: 1, size: 32, elements: !7)89!7 = !{!8, !10}90!8 = !DIDerivedType(tag: DW_TAG_member, name: "a", scope: !6, file: !1, line: 1, baseType: !9, size: 32)91!9 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)92!10 = !DIDerivedType(tag: DW_TAG_member, name: "b", scope: !6, file: !1, line: 1, baseType: !9, size: 32)93!11 = !DICompositeType(tag: DW_TAG_array_type, baseType: !12, size: 1280, elements: !13)94!12 = !DIDerivedType(tag: DW_TAG_typedef, name: "__int", file: !1, line: 3, baseType: !9)95!13 = !{!14}96!14 = !DISubrange(count: 40)97!15 = !{i32 2, !"Dwarf Version", i32 4}98!16 = !{i32 2, !"Debug Info Version", i32 3}99!17 = !{i32 1, !"wchar_size", i32 4}100!18 = !{!"clang version 10.0.0 (trunk 367256) (llvm/trunk 367266)"}101!19 = distinct !DISubprogram(name: "test", scope: !1, file: !1, line: 9, type: !20, scopeLine: 9, flags: DIFlagPrototyped, isDefinition: true, isOptimized: true, unit: !0, retainedNodes: !29)102!20 = !DISubroutineType(types: !21)103!21 = !{!9, !22}104!22 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !23, size: 64)105!23 = !DIDerivedType(tag: DW_TAG_typedef, name: "__v3", file: !1, line: 5, baseType: !24)106!24 = distinct !DICompositeType(tag: DW_TAG_union_type, name: "v3", file: !1, line: 4, size: 1280, elements: !25)107!25 = !{!26, !28}108!26 = !DIDerivedType(tag: DW_TAG_member, name: "c", scope: !24, file: !1, line: 4, baseType: !27, size: 8)109!27 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)110!28 = !DIDerivedType(tag: DW_TAG_member, name: "d", scope: !24, file: !1, line: 4, baseType: !11, size: 1280)111!29 = !{!30}112!30 = !DILocalVariable(name: "arg", arg: 1, scope: !19, file: !1, line: 9, type: !22)113!31 = !DILocation(line: 0, scope: !19)114!32 = !DILocation(line: 10, column: 20, scope: !19)115!33 = !DILocation(line: 10, column: 10, scope: !19)116!34 = !DILocation(line: 10, column: 3, scope: !19)117