122 lines
6.6 KiB
LLVM
122 lines
6.6 KiB
LLVM
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; RUN: opt -O2 %s | llvm-dis > %t1
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; RUN: llc -filetype=asm -o - %t1 | FileCheck -check-prefixes=CHECK %s
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; RUN: llc -mattr=+alu32 -filetype=asm -o - %t1 | FileCheck -check-prefixes=CHECK %s
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; Source code:
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; struct v1 { int a; int b; };
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; typedef struct v1 __v1;
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; typedef int __int;
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; struct v3 { char c; __int d[40]; };
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; typedef struct v3 __v3;
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; #define _(x) (__builtin_preserve_access_index(x))
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; #define cast_to_v1(x) ((__v1 *)(x))
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; int get_value(const int *arg);
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; int test(__v3 *arg) {
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; return get_value(_(&cast_to_v1(&arg->d[4])->b));
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; }
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; Compilation flag:
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; clang -target bpf -O2 -g -S -emit-llvm -Xclang -disable-llvm-passes test.c
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target triple = "bpf"
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%struct.v3 = type { i8, [40 x i32] }
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%struct.v1 = type { i32, i32 }
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; Function Attrs: nounwind
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define dso_local i32 @test(%struct.v3* %arg) local_unnamed_addr #0 !dbg !19 {
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entry:
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call void @llvm.dbg.value(metadata %struct.v3* %arg, metadata !30, metadata !DIExpression()), !dbg !31
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%0 = tail call [40 x i32]* @llvm.preserve.struct.access.index.p0a40i32.p0s_struct.v3s(%struct.v3* %arg, i32 1, i32 1), !dbg !32, !llvm.preserve.access.index !24
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%1 = tail call i32* @llvm.preserve.array.access.index.p0i32.p0a40i32([40 x i32]* %0, i32 1, i32 4), !dbg !32, !llvm.preserve.access.index !11
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%2 = bitcast i32* %1 to %struct.v1*, !dbg !32
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%3 = tail call i32* @llvm.preserve.struct.access.index.p0i32.p0s_struct.v1s(%struct.v1* %2, i32 1, i32 1), !dbg !32, !llvm.preserve.access.index !6
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%call = tail call i32 @get_value(i32* %3) #4, !dbg !33
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ret i32 %call, !dbg !34
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}
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; CHECK: r2 = 20
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; CHECK: r1 += r2
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; CHECK: r2 = 4
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; CHECK: r1 += r2
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; CHECK: call get_value
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; CHECK: .long 6 # BTF_KIND_STRUCT(id = [[TID1:[0-9]+]])
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; CHECK: .long 111 # BTF_KIND_STRUCT(id = [[TID2:[0-9]+]])
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; CHECK: .ascii "v3" # string offset=6
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; CHECK: .ascii ".text" # string offset=57
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; CHECK: .ascii "0:1:4" # string offset=63
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; CHECK: .ascii "v1" # string offset=111
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; CHECK: .ascii "0:1" # string offset=118
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; CHECK: .long 16 # FieldReloc
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; CHECK-NEXT: .long 57 # Field reloc section string offset=57
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; CHECK-NEXT: .long 2
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; CHECK-NEXT: .long .Ltmp{{[0-9]+}}
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; CHECK-NEXT: .long [[TID1]]
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; CHECK-NEXT: .long 63
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; CHECK-NEXT: .long 0
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; CHECK-NEXT: .long .Ltmp{{[0-9]+}}
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; CHECK-NEXT: .long [[TID2]]
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; CHECK-NEXT: .long 118
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; CHECK-NEXT: .long 0
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declare dso_local i32 @get_value(i32*) local_unnamed_addr #1
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; Function Attrs: nounwind readnone
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declare [40 x i32]* @llvm.preserve.struct.access.index.p0a40i32.p0s_struct.v3s(%struct.v3*, i32, i32) #2
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; Function Attrs: nounwind readnone
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declare i32* @llvm.preserve.array.access.index.p0i32.p0a40i32([40 x i32]*, i32, i32) #2
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; Function Attrs: nounwind readnone
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declare i32* @llvm.preserve.struct.access.index.p0i32.p0s_struct.v1s(%struct.v1*, i32, i32) #2
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; Function Attrs: nounwind readnone speculatable willreturn
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declare void @llvm.dbg.value(metadata, metadata, metadata) #3
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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" }
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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" }
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attributes #2 = { nounwind readnone }
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attributes #3 = { nounwind readnone speculatable willreturn }
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attributes #4 = { nounwind }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!15, !16, !17}
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!llvm.ident = !{!18}
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!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)
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!1 = !DIFile(filename: "test.c", directory: "/tmp/home/yhs/work/tests/llvm/cast")
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!2 = !{}
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!3 = !{!4, !11}
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!4 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !5, size: 64)
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!5 = !DIDerivedType(tag: DW_TAG_typedef, name: "__v1", file: !1, line: 2, baseType: !6)
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!6 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "v1", file: !1, line: 1, size: 64, elements: !7)
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!7 = !{!8, !10}
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!8 = !DIDerivedType(tag: DW_TAG_member, name: "a", scope: !6, file: !1, line: 1, baseType: !9, size: 32)
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!9 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!10 = !DIDerivedType(tag: DW_TAG_member, name: "b", scope: !6, file: !1, line: 1, baseType: !9, size: 32, offset: 32)
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!11 = !DICompositeType(tag: DW_TAG_array_type, baseType: !12, size: 1280, elements: !13)
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!12 = !DIDerivedType(tag: DW_TAG_typedef, name: "__int", file: !1, line: 3, baseType: !9)
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!13 = !{!14}
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!14 = !DISubrange(count: 40)
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!15 = !{i32 2, !"Dwarf Version", i32 4}
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!16 = !{i32 2, !"Debug Info Version", i32 3}
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!17 = !{i32 1, !"wchar_size", i32 4}
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!18 = !{!"clang version 10.0.0 (trunk 367256) (llvm/trunk 367266)"}
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!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)
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!20 = !DISubroutineType(types: !21)
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!21 = !{!9, !22}
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!22 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !23, size: 64)
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!23 = !DIDerivedType(tag: DW_TAG_typedef, name: "__v3", file: !1, line: 5, baseType: !24)
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!24 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "v3", file: !1, line: 4, size: 1312, elements: !25)
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!25 = !{!26, !28}
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!26 = !DIDerivedType(tag: DW_TAG_member, name: "c", scope: !24, file: !1, line: 4, baseType: !27, size: 8)
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!27 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)
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!28 = !DIDerivedType(tag: DW_TAG_member, name: "d", scope: !24, file: !1, line: 4, baseType: !11, size: 1280, offset: 32)
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!29 = !{!30}
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!30 = !DILocalVariable(name: "arg", arg: 1, scope: !19, file: !1, line: 9, type: !22)
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!31 = !DILocation(line: 0, scope: !19)
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!32 = !DILocation(line: 10, column: 20, scope: !19)
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!33 = !DILocation(line: 10, column: 10, scope: !19)
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!34 = !DILocation(line: 10, column: 3, scope: !19)
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