136 lines
6.6 KiB
LLVM
136 lines
6.6 KiB
LLVM
; RUN: opt -passes=bpf-preserve-static-offset -mtriple=bpf-pc-linux -S -o - %s | FileCheck %s
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;
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; Source:
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; #define __ctx __attribute__((preserve_static_offset))
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; #define __pai __attribute__((preserve_access_index))
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;
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; struct foo {
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; char a[10];
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; } __pai;
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;
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; struct bar {
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; int a;
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; int b;
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; } __pai;
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;
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; struct buz {
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; int _1;
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; int _2;
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; int _3;
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; union {
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; struct foo a;
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; struct bar b[7];
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; };
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; } __pai __ctx;
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;
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; void quux(struct buz *p) {
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; p->b[5].b = 42;
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; }
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;
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; Compilation flag:
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; clang -cc1 -O2 -triple bpf -S -emit-llvm -disable-llvm-passes \
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; -debug-info-kind=limited -o - \
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; | opt -passes=function(sroa) -S -o -
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%struct.buz = type { i32, i32, i32, %union.anon }
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%union.anon = type { [7 x %struct.bar] }
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%struct.bar = type { i32, i32 }
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; Function Attrs: nounwind
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define dso_local void @quux(ptr noundef %p) #0 !dbg !31 {
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entry:
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call void @llvm.dbg.value(metadata ptr %p, metadata !36, metadata !DIExpression()), !dbg !37
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%0 = call ptr @llvm.preserve.static.offset(ptr %p), !dbg !38
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%1 = call ptr @llvm.preserve.struct.access.index.p0.p0(ptr elementtype(%struct.buz) %0, i32 3, i32 3), !dbg !38, !llvm.preserve.access.index !4
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%2 = call ptr @llvm.preserve.union.access.index.p0.p0(ptr %1, i32 1), !dbg !38, !llvm.preserve.access.index !3
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%3 = call ptr @llvm.preserve.array.access.index.p0.p0(ptr elementtype([7 x %struct.bar]) %2, i32 1, i32 5), !dbg !39, !llvm.preserve.access.index !21
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%4 = call ptr @llvm.preserve.struct.access.index.p0.p0(ptr elementtype(%struct.bar) %3, i32 1, i32 1), !dbg !40, !llvm.preserve.access.index !22
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store i32 42, ptr %4, align 4, !dbg !41, !tbaa !42
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ret void, !dbg !45
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}
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; CHECK: define dso_local void @quux(ptr noundef %[[p:.*]]) {{.*}} {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: call void @llvm.dbg.value
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; CHECK-NEXT: call void (i32, ptr, i1, i8, i8, i8, i1, ...)
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; CHECK-SAME: @llvm.bpf.getelementptr.and.store.i32
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; CHECK-SAME: (i32 42,
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; CHECK-SAME: ptr writeonly elementtype(i8) %[[p]],
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; CHECK-SAME: i1 false, i8 0, i8 1, i8 2, i1 true, i64 immarg 56)
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; CHECK-SAME: #[[v5:.*]], !tbaa
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; CHECK-NEXT: ret void, !dbg
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; CHECK-NEXT: }
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; CHECK: attributes #[[v5]] = { memory(argmem: write) }
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; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
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declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
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; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
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declare ptr @llvm.preserve.static.offset(ptr readnone) #1
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; Function Attrs: nocallback nofree nosync nounwind willreturn memory(none)
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declare ptr @llvm.preserve.struct.access.index.p0.p0(ptr, i32 immarg, i32 immarg) #2
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; Function Attrs: nocallback nofree nosync nounwind willreturn memory(none)
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declare ptr @llvm.preserve.union.access.index.p0.p0(ptr, i32 immarg) #2
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; Function Attrs: nocallback nofree nosync nounwind willreturn memory(none)
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declare ptr @llvm.preserve.array.access.index.p0.p0(ptr, i32 immarg, i32 immarg) #2
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; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
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declare void @llvm.dbg.value(metadata, metadata, metadata) #1
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attributes #0 = { nounwind "no-trapping-math"="true" "stack-protector-buffer-size"="8" }
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attributes #1 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
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attributes #2 = { nocallback nofree nosync nounwind willreturn memory(none) }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!28, !29}
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!llvm.ident = !{!30}
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!0 = distinct !DICompileUnit(language: DW_LANG_C11, file: !1, producer: "clang", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, retainedTypes: !2, splitDebugInlining: false, nameTableKind: None)
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!1 = !DIFile(filename: "some-file.c", directory: "/some/dir/")
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!2 = !{!3, !21}
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!3 = distinct !DICompositeType(tag: DW_TAG_union_type, scope: !4, file: !1, line: 17, size: 448, elements: !11)
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!4 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "buz", file: !1, line: 13, size: 544, elements: !5)
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!5 = !{!6, !8, !9, !10}
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!6 = !DIDerivedType(tag: DW_TAG_member, name: "_1", scope: !4, file: !1, line: 14, baseType: !7, size: 32)
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!7 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!8 = !DIDerivedType(tag: DW_TAG_member, name: "_2", scope: !4, file: !1, line: 15, baseType: !7, size: 32, offset: 32)
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!9 = !DIDerivedType(tag: DW_TAG_member, name: "_3", scope: !4, file: !1, line: 16, baseType: !7, size: 32, offset: 64)
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!10 = !DIDerivedType(tag: DW_TAG_member, scope: !4, file: !1, line: 17, baseType: !3, size: 448, offset: 96)
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!11 = !{!12, !20}
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!12 = !DIDerivedType(tag: DW_TAG_member, name: "a", scope: !3, file: !1, line: 18, baseType: !13, size: 80)
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!13 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "foo", file: !1, line: 4, size: 80, elements: !14)
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!14 = !{!15}
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!15 = !DIDerivedType(tag: DW_TAG_member, name: "a", scope: !13, file: !1, line: 5, baseType: !16, size: 80)
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!16 = !DICompositeType(tag: DW_TAG_array_type, baseType: !17, size: 80, elements: !18)
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!17 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)
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!18 = !{!19}
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!19 = !DISubrange(count: 10)
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!20 = !DIDerivedType(tag: DW_TAG_member, name: "b", scope: !3, file: !1, line: 19, baseType: !21, size: 448)
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!21 = !DICompositeType(tag: DW_TAG_array_type, baseType: !22, size: 448, elements: !26)
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!22 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "bar", file: !1, line: 8, size: 64, elements: !23)
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!23 = !{!24, !25}
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!24 = !DIDerivedType(tag: DW_TAG_member, name: "a", scope: !22, file: !1, line: 9, baseType: !7, size: 32)
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!25 = !DIDerivedType(tag: DW_TAG_member, name: "b", scope: !22, file: !1, line: 10, baseType: !7, size: 32, offset: 32)
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!26 = !{!27}
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!27 = !DISubrange(count: 7)
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!28 = !{i32 2, !"Debug Info Version", i32 3}
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!29 = !{i32 1, !"wchar_size", i32 4}
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!30 = !{!"clang"}
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!31 = distinct !DISubprogram(name: "quux", scope: !1, file: !1, line: 23, type: !32, scopeLine: 23, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !35)
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!32 = !DISubroutineType(types: !33)
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!33 = !{null, !34}
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!34 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !4, size: 64)
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!35 = !{!36}
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!36 = !DILocalVariable(name: "p", arg: 1, scope: !31, file: !1, line: 23, type: !34)
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!37 = !DILocation(line: 0, scope: !31)
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!38 = !DILocation(line: 24, column: 6, scope: !31)
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!39 = !DILocation(line: 24, column: 3, scope: !31)
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!40 = !DILocation(line: 24, column: 11, scope: !31)
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!41 = !DILocation(line: 24, column: 13, scope: !31)
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!42 = !{!43, !43, i64 0}
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!43 = !{!"omnipotent char", !44, i64 0}
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!44 = !{!"Simple C/C++ TBAA"}
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!45 = !DILocation(line: 25, column: 1, scope: !31)
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