107 lines
5.7 KiB
LLVM
107 lines
5.7 KiB
LLVM
; RUN: opt -O2 -mtriple=bpf-pc-linux %s | llvm-dis > %t1
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; RUN: llc -o - %t1 | FileCheck %s
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; RUN: opt -passes='default<O2>' -mtriple=bpf-pc-linux %s | llvm-dis > %t1
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; RUN: llc -o - %t1 | FileCheck %s
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;
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; Source:
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; struct s1 { int a; int b; } __attribute__((preserve_access_index));
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; int foo(struct s1 *arg) { return arg->a; }
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; int bar(struct s1 *arg) { return arg->a; }
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; Compilation flag:
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; clang -target bpf -O2 -S -emit-llvm -g -Xclang -disable-llvm-passes test.c
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%struct.s1 = type { i32, i32 }
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; Function Attrs: nounwind
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define dso_local i32 @foo(%struct.s1* %arg) #0 !dbg !7 {
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entry:
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%arg.addr = alloca %struct.s1*, align 8
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store %struct.s1* %arg, %struct.s1** %arg.addr, align 8, !tbaa !18
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call void @llvm.dbg.declare(metadata %struct.s1** %arg.addr, metadata !17, metadata !DIExpression()), !dbg !22
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%0 = load %struct.s1*, %struct.s1** %arg.addr, align 8, !dbg !23, !tbaa !18
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%1 = call i32* @llvm.preserve.struct.access.index.p0i32.p0s_struct.s1s(%struct.s1* %0, i32 0, i32 0), !dbg !24, !llvm.preserve.access.index !12
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%2 = load i32, i32* %1, align 4, !dbg !24, !tbaa !25
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ret i32 %2, !dbg !28
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}
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; Function Attrs: nounwind readnone speculatable willreturn
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declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
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; Function Attrs: nounwind readnone
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declare i32* @llvm.preserve.struct.access.index.p0i32.p0s_struct.s1s(%struct.s1*, i32 immarg, i32 immarg) #2
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; Function Attrs: nounwind
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define dso_local i32 @bar(%struct.s1* %arg) #0 !dbg !29 {
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entry:
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%arg.addr = alloca %struct.s1*, align 8
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store %struct.s1* %arg, %struct.s1** %arg.addr, align 8, !tbaa !18
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call void @llvm.dbg.declare(metadata %struct.s1** %arg.addr, metadata !31, metadata !DIExpression()), !dbg !32
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%0 = load %struct.s1*, %struct.s1** %arg.addr, align 8, !dbg !33, !tbaa !18
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%1 = call i32* @llvm.preserve.struct.access.index.p0i32.p0s_struct.s1s(%struct.s1* %0, i32 0, i32 0), !dbg !34, !llvm.preserve.access.index !12
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%2 = load i32, i32* %1, align 4, !dbg !34, !tbaa !25
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ret i32 %2, !dbg !35
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}
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; CHECK: .long 1 # BTF_KIND_STRUCT(id = 2)
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; CHECK: .ascii "s1" # string offset=1
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; CHECK: .ascii ".text" # string offset=20
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; CHECK: .ascii "0:0" # string offset=26
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; CHECK: .long 16 # FieldReloc
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; CHECK-NEXT: .long 20 # Field reloc section string offset=20
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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 2
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; CHECK-NEXT: .long 26
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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 2
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; CHECK-NEXT: .long 26
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; CHECK-NEXT: .long 0
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attributes #0 = { nounwind "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"="true" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
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attributes #1 = { nounwind readnone speculatable willreturn }
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attributes #2 = { nounwind readnone }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4, !5}
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!llvm.ident = !{!6}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 12.0.0 (https://github.com/llvm/llvm-project.git 2f40e20613758b3e11a15494c09f4b6973673d6b)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None)
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!1 = !DIFile(filename: "test.c", directory: "/tmp/home/yhs/work/tests/core")
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!2 = !{}
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!3 = !{i32 7, !"Dwarf Version", i32 4}
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!4 = !{i32 2, !"Debug Info Version", i32 3}
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!5 = !{i32 1, !"wchar_size", i32 4}
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!6 = !{!"clang version 12.0.0 (https://github.com/llvm/llvm-project.git 2f40e20613758b3e11a15494c09f4b6973673d6b)"}
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!7 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 2, type: !8, scopeLine: 2, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !16)
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!8 = !DISubroutineType(types: !9)
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!9 = !{!10, !11}
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!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!11 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !12, size: 64)
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!12 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "s1", file: !1, line: 1, size: 64, elements: !13)
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!13 = !{!14, !15}
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!14 = !DIDerivedType(tag: DW_TAG_member, name: "a", scope: !12, file: !1, line: 1, baseType: !10, size: 32)
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!15 = !DIDerivedType(tag: DW_TAG_member, name: "b", scope: !12, file: !1, line: 1, baseType: !10, size: 32, offset: 32)
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!16 = !{!17}
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!17 = !DILocalVariable(name: "arg", arg: 1, scope: !7, file: !1, line: 2, type: !11)
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!18 = !{!19, !19, i64 0}
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!19 = !{!"any pointer", !20, i64 0}
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!20 = !{!"omnipotent char", !21, i64 0}
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!21 = !{!"Simple C/C++ TBAA"}
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!22 = !DILocation(line: 2, column: 20, scope: !7)
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!23 = !DILocation(line: 2, column: 34, scope: !7)
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!24 = !DILocation(line: 2, column: 39, scope: !7)
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!25 = !{!26, !27, i64 0}
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!26 = !{!"s1", !27, i64 0, !27, i64 4}
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!27 = !{!"int", !20, i64 0}
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!28 = !DILocation(line: 2, column: 27, scope: !7)
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!29 = distinct !DISubprogram(name: "bar", scope: !1, file: !1, line: 3, type: !8, scopeLine: 3, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !30)
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!30 = !{!31}
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!31 = !DILocalVariable(name: "arg", arg: 1, scope: !29, file: !1, line: 3, type: !11)
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!32 = !DILocation(line: 3, column: 20, scope: !29)
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!33 = !DILocation(line: 3, column: 34, scope: !29)
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!34 = !DILocation(line: 3, column: 39, scope: !29)
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!35 = !DILocation(line: 3, column: 27, scope: !29)
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