| ; RUN: llc -march=bpfel -filetype=asm -o - %s | FileCheck -check-prefixes=CHECK %s |
| ; RUN: llc -march=bpfeb -filetype=asm -o - %s | FileCheck -check-prefixes=CHECK %s |
| ; Source code: |
| ; struct v1 { int a; int b; }; |
| ; struct v2 { int c; int d; }; |
| ; struct v3 { char c; struct v2 d; }; |
| ; #define _(x) (__builtin_preserve_access_index(x)) |
| ; #define cast_to_v1(x) ((struct v1 *)(x)) |
| ; int get_value(const int *arg); |
| ; int test(struct v3 *arg) { |
| ; return get_value(_(&cast_to_v1(&arg->d)->b)); |
| ; } |
| ; Compilation flag: |
| ; clang -target bpf -O2 -g -S -emit-llvm test.c |
| |
| %struct.v3 = type { i8, %struct.v2 } |
| %struct.v2 = type { i32, i32 } |
| %struct.v1 = type { i32, i32 } |
| |
| ; Function Attrs: nounwind |
| define dso_local i32 @test(%struct.v3* %arg) local_unnamed_addr #0 !dbg !14 { |
| entry: |
| call void @llvm.dbg.value(metadata %struct.v3* %arg, metadata !28, metadata !DIExpression()), !dbg !29 |
| %0 = tail call %struct.v2* @llvm.preserve.struct.access.index.p0s_struct.v2s.p0s_struct.v3s(%struct.v3* %arg, i32 1, i32 1), !dbg !30, !llvm.preserve.access.index !18 |
| %1 = bitcast %struct.v2* %0 to %struct.v1*, !dbg !30 |
| %2 = tail call i32* @llvm.preserve.struct.access.index.p0i32.p0s_struct.v1s(%struct.v1* %1, i32 1, i32 1), !dbg !30, !llvm.preserve.access.index !5 |
| %call = tail call i32 @get_value(i32* %2) #4, !dbg !31 |
| ret i32 %call, !dbg !32 |
| } |
| |
| ; CHECK: r2 = 4 |
| ; CHECK: r1 += r2 |
| ; CHECK: r2 = 4 |
| ; CHECK: r1 += r2 |
| ; CHECK: call get_value |
| |
| ; CHECK: .long 1 # BTF_KIND_STRUCT(id = [[V3_TID:[0-9]+]]) |
| ; CHECK: .long 81 # BTF_KIND_STRUCT(id = [[V1_TID:[0-9]+]]) |
| |
| ; CHECK: .ascii "v3" # string offset=1 |
| ; CHECK-NEXT: .byte 0 |
| ; CHECK: .ascii ".text" # string offset=[[SEC_STR:[0-9]+]] |
| ; CHECK-NEXT: .byte 0 |
| ; CHECK: .ascii "0:1" # string offset=[[ACCESS_STR:[0-9]+]] |
| ; CHECK-NEXT: .byte 0 |
| ; CHECK: .ascii "v1" # string offset=81 |
| ; CHECK-NEXT: .byte 0 |
| |
| ; CHECK: .long 16 # FieldReloc |
| ; CHECK-NEXT: .long [[SEC_STR]] # Field reloc section string offset=[[SEC_STR]] |
| ; CHECK-NEXT: .long 2 |
| ; CHECK-NEXT: .long .Ltmp{{[0-9]+}} |
| ; CHECK-NEXT: .long [[V3_TID]] |
| ; CHECK-NEXT: .long [[ACCESS_STR]] |
| ; CHECK-NEXT: .long 0 |
| ; CHECK-NEXT: .long .Ltmp{{[0-9]+}} |
| ; CHECK-NEXT: .long [[V1_TID]] |
| ; CHECK-NEXT: .long [[ACCESS_STR]] |
| ; CHECK-NEXT: .long 0 |
| |
| declare dso_local i32 @get_value(i32*) local_unnamed_addr #1 |
| |
| ; Function Attrs: nounwind readnone |
| declare %struct.v2* @llvm.preserve.struct.access.index.p0s_struct.v2s.p0s_struct.v3s(%struct.v3*, i32, i32) #2 |
| |
| ; Function Attrs: nounwind readnone |
| declare i32* @llvm.preserve.struct.access.index.p0i32.p0s_struct.v1s(%struct.v1*, i32, i32) #2 |
| |
| ; Function Attrs: nounwind readnone speculatable willreturn |
| declare void @llvm.dbg.value(metadata, metadata, metadata) #3 |
| |
| attributes #0 = { nounwind "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "frame-pointer"="all" "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"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" } |
| attributes #1 = { "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "frame-pointer"="all" "less-precise-fpmad"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" } |
| attributes #2 = { nounwind readnone } |
| attributes #3 = { nounwind readnone speculatable willreturn } |
| attributes #4 = { nounwind } |
| |
| !llvm.dbg.cu = !{!0} |
| !llvm.module.flags = !{!10, !11, !12} |
| !llvm.ident = !{!13} |
| |
| !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) |
| !1 = !DIFile(filename: "test.c", directory: "/tmp/home/yhs/work/tests/llvm/cast") |
| !2 = !{} |
| !3 = !{!4} |
| !4 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !5, size: 64) |
| !5 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "v1", file: !1, line: 1, size: 64, elements: !6) |
| !6 = !{!7, !9} |
| !7 = !DIDerivedType(tag: DW_TAG_member, name: "a", scope: !5, file: !1, line: 1, baseType: !8, size: 32) |
| !8 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) |
| !9 = !DIDerivedType(tag: DW_TAG_member, name: "b", scope: !5, file: !1, line: 1, baseType: !8, size: 32, offset: 32) |
| !10 = !{i32 2, !"Dwarf Version", i32 4} |
| !11 = !{i32 2, !"Debug Info Version", i32 3} |
| !12 = !{i32 1, !"wchar_size", i32 4} |
| !13 = !{!"clang version 10.0.0 (trunk 367256) (llvm/trunk 367266)"} |
| !14 = distinct !DISubprogram(name: "test", scope: !1, file: !1, line: 7, type: !15, scopeLine: 7, flags: DIFlagPrototyped, isDefinition: true, isOptimized: true, unit: !0, retainedNodes: !27) |
| !15 = !DISubroutineType(types: !16) |
| !16 = !{!8, !17} |
| !17 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !18, size: 64) |
| !18 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "v3", file: !1, line: 3, size: 96, elements: !19) |
| !19 = !{!20, !22} |
| !20 = !DIDerivedType(tag: DW_TAG_member, name: "c", scope: !18, file: !1, line: 3, baseType: !21, size: 8) |
| !21 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char) |
| !22 = !DIDerivedType(tag: DW_TAG_member, name: "d", scope: !18, file: !1, line: 3, baseType: !23, size: 64, offset: 32) |
| !23 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "v2", file: !1, line: 2, size: 64, elements: !24) |
| !24 = !{!25, !26} |
| !25 = !DIDerivedType(tag: DW_TAG_member, name: "c", scope: !23, file: !1, line: 2, baseType: !8, size: 32) |
| !26 = !DIDerivedType(tag: DW_TAG_member, name: "d", scope: !23, file: !1, line: 2, baseType: !8, size: 32, offset: 32) |
| !27 = !{!28} |
| !28 = !DILocalVariable(name: "arg", arg: 1, scope: !14, file: !1, line: 7, type: !17) |
| !29 = !DILocation(line: 0, scope: !14) |
| !30 = !DILocation(line: 8, column: 20, scope: !14) |
| !31 = !DILocation(line: 8, column: 10, scope: !14) |
| !32 = !DILocation(line: 8, column: 3, scope: !14) |
