| ; RUN: opt -O2 %s | llvm-dis > %t1 |
| ; RUN: llc -filetype=asm -o - %t1 | FileCheck -check-prefixes=CHECK,CHECK-EL,CHECK-ALU64 %s |
| ; RUN: llc -mattr=+alu32 -filetype=asm -o - %t1 | FileCheck -check-prefixes=CHECK,CHECK-EL,CHECK-ALU32 %s |
| ; Source code: |
| ; struct s { |
| ; char f1; |
| ; char bf1:6, |
| ; bf2:2, |
| ; bf3:5, |
| ; bf4:3; |
| ; }; |
| ; enum {FIELD_TYPE_OFFSET = 0, FIELD_TYPE_SIZE = 1, FIELD_TYPE_LSHIFT_U64 = 4,}; |
| ; int test(struct s *arg) { |
| ; return __builtin_preserve_field_info(arg->bf4, FIELD_TYPE_OFFSET) + |
| ; __builtin_preserve_field_info(arg->bf4, FIELD_TYPE_SIZE) + |
| ; __builtin_preserve_field_info(arg->bf4, FIELD_TYPE_LSHIFT_U64); |
| ; } |
| ; For this case, the IR type has the same starting storage offset for fields |
| ; bf1, bf1, bf3 and bf4 and the ABI alignment is 1 byte. So for bf4 access, |
| ; the starting offset has to be at the beginning of field bf3. |
| ; Compilation flag: |
| ; clang -target bpfel -O2 -g -S -emit-llvm -Xclang -disable-llvm-passes test.c |
| |
| target triple = "bpfel" |
| |
| %struct.s = type <{ i8, i16 }> |
| |
| ; Function Attrs: nounwind readnone |
| define dso_local i32 @test(%struct.s* %arg) local_unnamed_addr #0 !dbg !13 { |
| entry: |
| call void @llvm.dbg.value(metadata %struct.s* %arg, metadata !27, metadata !DIExpression()), !dbg !28 |
| %0 = tail call i16* @llvm.preserve.struct.access.index.p0i16.p0s_struct.ss(%struct.s* elementtype(%struct.s) %arg, i32 1, i32 4), !dbg !29, !llvm.preserve.access.index !18 |
| %1 = tail call i32 @llvm.bpf.preserve.field.info.p0i16(i16* %0, i64 0), !dbg !30 |
| %2 = tail call i32 @llvm.bpf.preserve.field.info.p0i16(i16* %0, i64 1), !dbg !31 |
| %add = add i32 %2, %1, !dbg !32 |
| %3 = tail call i32 @llvm.bpf.preserve.field.info.p0i16(i16* %0, i64 4), !dbg !33 |
| %add1 = add i32 %add, %3, !dbg !34 |
| ret i32 %add1, !dbg !35 |
| } |
| |
| ; CHECK: r1 = 2 |
| ; CHECK: r0 = 1 |
| ; CHECK-ALU64: r0 += r1 |
| ; CHECK-ALU32: w0 += w1 |
| ; CHECK-EL: r1 = 56 |
| ; CHECK-ALU64: r0 += r1 |
| ; CHECK-ALU32: w0 += w1 |
| ; CHECK: exit |
| |
| ; CHECK: .long 1 # BTF_KIND_STRUCT(id = 2) |
| |
| ; CHECK: .byte 115 # string offset=1 |
| ; CHECK: .ascii ".text" # string offset=40 |
| ; CHECK: .ascii "0:4" # string offset=46 |
| |
| ; CHECK: .long 16 # FieldReloc |
| ; CHECK-NEXT: .long 40 # Field reloc section string offset=40 |
| ; CHECK-NEXT: .long 3 |
| ; CHECK-NEXT: .long .Ltmp{{[0-9]+}} |
| ; CHECK-NEXT: .long 2 |
| ; CHECK-NEXT: .long 46 |
| ; CHECK-NEXT: .long 0 |
| ; CHECK-NEXT: .long .Ltmp{{[0-9]+}} |
| ; CHECK-NEXT: .long 2 |
| ; CHECK-NEXT: .long 46 |
| ; CHECK-NEXT: .long 1 |
| ; CHECK-NEXT: .long .Ltmp{{[0-9]+}} |
| ; CHECK-NEXT: .long 2 |
| ; CHECK-NEXT: .long 46 |
| ; CHECK-NEXT: .long 4 |
| |
| ; Function Attrs: nounwind readnone |
| declare i16* @llvm.preserve.struct.access.index.p0i16.p0s_struct.ss(%struct.s*, i32, i32) #1 |
| |
| ; Function Attrs: nounwind readnone |
| declare i32 @llvm.bpf.preserve.field.info.p0i16(i16*, i64) #1 |
| |
| ; Function Attrs: nounwind readnone speculatable |
| declare void @llvm.dbg.value(metadata, metadata, metadata) #2 |
| |
| attributes #0 = { nounwind readnone "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 = { nounwind readnone } |
| attributes #2 = { nounwind readnone speculatable } |
| |
| !llvm.dbg.cu = !{!0} |
| !llvm.module.flags = !{!9, !10, !11} |
| !llvm.ident = !{!12} |
| |
| !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 10.0.0 (https://github.com/llvm/llvm-project.git 630ca91834ecc06349cb3b4bd2982c1b85b5ad96)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None) |
| !1 = !DIFile(filename: "test.c", directory: "/tmp/home/yhs/work/tests/core") |
| !2 = !{!3} |
| !3 = !DICompositeType(tag: DW_TAG_enumeration_type, file: !1, line: 8, baseType: !4, size: 32, elements: !5) |
| !4 = !DIBasicType(name: "unsigned int", size: 32, encoding: DW_ATE_unsigned) |
| !5 = !{!6, !7, !8} |
| !6 = !DIEnumerator(name: "FIELD_TYPE_OFFSET", value: 0, isUnsigned: true) |
| !7 = !DIEnumerator(name: "FIELD_TYPE_SIZE", value: 1, isUnsigned: true) |
| !8 = !DIEnumerator(name: "FIELD_TYPE_LSHIFT_U64", value: 4, isUnsigned: true) |
| !9 = !{i32 2, !"Dwarf Version", i32 4} |
| !10 = !{i32 2, !"Debug Info Version", i32 3} |
| !11 = !{i32 1, !"wchar_size", i32 4} |
| !12 = !{!"clang version 10.0.0 (https://github.com/llvm/llvm-project.git 630ca91834ecc06349cb3b4bd2982c1b85b5ad96)"} |
| !13 = distinct !DISubprogram(name: "test", scope: !1, file: !1, line: 9, type: !14, scopeLine: 9, flags: DIFlagPrototyped, isDefinition: true, isOptimized: true, unit: !0, retainedNodes: !26) |
| !14 = !DISubroutineType(types: !15) |
| !15 = !{!16, !17} |
| !16 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) |
| !17 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !18, size: 64) |
| !18 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "s", file: !1, line: 1, size: 24, elements: !19) |
| !19 = !{!20, !22, !23, !24, !25} |
| !20 = !DIDerivedType(tag: DW_TAG_member, name: "f1", scope: !18, file: !1, line: 2, baseType: !21, size: 8) |
| !21 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char) |
| !22 = !DIDerivedType(tag: DW_TAG_member, name: "bf1", scope: !18, file: !1, line: 3, baseType: !21, size: 6, offset: 8, flags: DIFlagBitField, extraData: i64 8) |
| !23 = !DIDerivedType(tag: DW_TAG_member, name: "bf2", scope: !18, file: !1, line: 4, baseType: !21, size: 2, offset: 14, flags: DIFlagBitField, extraData: i64 8) |
| !24 = !DIDerivedType(tag: DW_TAG_member, name: "bf3", scope: !18, file: !1, line: 5, baseType: !21, size: 5, offset: 16, flags: DIFlagBitField, extraData: i64 8) |
| !25 = !DIDerivedType(tag: DW_TAG_member, name: "bf4", scope: !18, file: !1, line: 6, baseType: !21, size: 3, offset: 21, flags: DIFlagBitField, extraData: i64 8) |
| !26 = !{!27} |
| !27 = !DILocalVariable(name: "arg", arg: 1, scope: !13, file: !1, line: 9, type: !17) |
| !28 = !DILocation(line: 0, scope: !13) |
| !29 = !DILocation(line: 10, column: 45, scope: !13) |
| !30 = !DILocation(line: 10, column: 10, scope: !13) |
| !31 = !DILocation(line: 11, column: 10, scope: !13) |
| !32 = !DILocation(line: 10, column: 69, scope: !13) |
| !33 = !DILocation(line: 12, column: 10, scope: !13) |
| !34 = !DILocation(line: 11, column: 67, scope: !13) |
| !35 = !DILocation(line: 10, column: 3, scope: !13) |