127 lines
6.9 KiB
LLVM
127 lines
6.9 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,CHECK-ALU64 %s
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; RUN: llc -mattr=+alu32 -filetype=asm -o - %t1 | FileCheck -check-prefixes=CHECK,CHECK-ALU32 %s
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; Source code:
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; typedef struct s1 { int a1; short a2; } __s1;
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; union u1 { int b1; __s1 b2; };
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; enum { FIELD_LSHIFT_U64 = 4, };
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; int test(union u1 *arg) {
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; unsigned r1 = __builtin_preserve_field_info(arg->b2.a1, FIELD_LSHIFT_U64);
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; unsigned r2 = __builtin_preserve_field_info(arg->b2.a2, FIELD_LSHIFT_U64);
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; /* big endian: r1: 32, r2: 48 */
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; /* little endian: r1: 32, r2: 48 */
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; return r1 + r2;
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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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%union.u1 = type { %struct.s1 }
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%struct.s1 = type { i32, i16 }
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; Function Attrs: nounwind readnone
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define dso_local i32 @test(%union.u1* %arg) local_unnamed_addr #0 !dbg !11 {
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entry:
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call void @llvm.dbg.value(metadata %union.u1* %arg, metadata !27, metadata !DIExpression()), !dbg !30
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%0 = tail call %union.u1* @llvm.preserve.union.access.index.p0s_union.u1s.p0s_union.u1s(%union.u1* %arg, i32 1), !dbg !31, !llvm.preserve.access.index !16
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%b2 = getelementptr %union.u1, %union.u1* %0, i64 0, i32 0, !dbg !31
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%1 = tail call i32* @llvm.preserve.struct.access.index.p0i32.p0s_struct.s1s(%struct.s1* %b2, i32 0, i32 0), !dbg !32, !llvm.preserve.access.index !21
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%2 = tail call i32 @llvm.bpf.preserve.field.info.p0i32(i32* %1, i64 4), !dbg !33
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call void @llvm.dbg.value(metadata i32 %2, metadata !28, metadata !DIExpression()), !dbg !30
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%3 = tail call i16* @llvm.preserve.struct.access.index.p0i16.p0s_struct.s1s(%struct.s1* %b2, i32 1, i32 1), !dbg !34, !llvm.preserve.access.index !21
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%4 = tail call i32 @llvm.bpf.preserve.field.info.p0i16(i16* %3, i64 4), !dbg !35
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call void @llvm.dbg.value(metadata i32 %4, metadata !29, metadata !DIExpression()), !dbg !30
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%add = add i32 %4, %2, !dbg !36
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ret i32 %add, !dbg !37
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}
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; CHECK: r1 = 32
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; CHECK: r0 = 48
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; CHECK-ALU64: r0 += r1
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; CHECK-ALU32: w0 += w1
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; CHECK: exit
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; CHECK: .long 1 # BTF_KIND_UNION(id = 2)
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; CHECK: .ascii "u1" # string offset=1
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; CHECK: .ascii ".text" # string offset=43
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; CHECK: .ascii "0:1:0" # string offset=49
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; CHECK: .ascii "0:1:1" # string offset=92
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; CHECK: .long 16 # FieldReloc
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; CHECK-NEXT: .long 43 # Field reloc section string offset=43
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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 49
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; CHECK-NEXT: .long 4
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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 92
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; CHECK-NEXT: .long 4
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; Function Attrs: nounwind readnone
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declare %union.u1* @llvm.preserve.union.access.index.p0s_union.u1s.p0s_union.u1s(%union.u1*, i32) #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, i32) #1
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; Function Attrs: nounwind readnone
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declare i32 @llvm.bpf.preserve.field.info.p0i32(i32*, i64) #1
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; Function Attrs: nounwind readnone
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declare i16* @llvm.preserve.struct.access.index.p0i16.p0s_struct.s1s(%struct.s1*, i32, i32) #1
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; Function Attrs: nounwind readnone
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declare i32 @llvm.bpf.preserve.field.info.p0i16(i16*, i64) #1
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; Function Attrs: nounwind readnone speculatable willreturn
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declare void @llvm.dbg.value(metadata, metadata, metadata) #2
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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" }
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attributes #1 = { nounwind readnone }
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attributes #2 = { nounwind readnone speculatable willreturn }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!7, !8, !9}
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!llvm.ident = !{!10}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 10.0.0 (https://github.com/llvm/llvm-project.git 5635073377f153f7f2ff9b34c77af3c79885ff4a)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None)
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!1 = !DIFile(filename: "test.c", directory: "/tmp/home/yhs/work/tests/core")
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!2 = !{!3}
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!3 = !DICompositeType(tag: DW_TAG_enumeration_type, file: !1, line: 3, baseType: !4, size: 32, elements: !5)
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!4 = !DIBasicType(name: "unsigned int", size: 32, encoding: DW_ATE_unsigned)
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!5 = !{!6}
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!6 = !DIEnumerator(name: "FIELD_LSHIFT_U64", value: 4, isUnsigned: true)
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!7 = !{i32 2, !"Dwarf Version", i32 4}
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!8 = !{i32 2, !"Debug Info Version", i32 3}
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!9 = !{i32 1, !"wchar_size", i32 4}
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!10 = !{!"clang version 10.0.0 (https://github.com/llvm/llvm-project.git 5635073377f153f7f2ff9b34c77af3c79885ff4a)"}
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!11 = distinct !DISubprogram(name: "test", scope: !1, file: !1, line: 4, type: !12, scopeLine: 4, flags: DIFlagPrototyped, isDefinition: true, isOptimized: true, unit: !0, retainedNodes: !26)
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!12 = !DISubroutineType(types: !13)
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!13 = !{!14, !15}
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!14 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!15 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !16, size: 64)
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!16 = distinct !DICompositeType(tag: DW_TAG_union_type, name: "u1", file: !1, line: 2, size: 64, elements: !17)
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!17 = !{!18, !19}
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!18 = !DIDerivedType(tag: DW_TAG_member, name: "b1", scope: !16, file: !1, line: 2, baseType: !14, size: 32)
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!19 = !DIDerivedType(tag: DW_TAG_member, name: "b2", scope: !16, file: !1, line: 2, baseType: !20, size: 64)
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!20 = !DIDerivedType(tag: DW_TAG_typedef, name: "__s1", file: !1, line: 1, baseType: !21)
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!21 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "s1", file: !1, line: 1, size: 64, elements: !22)
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!22 = !{!23, !24}
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!23 = !DIDerivedType(tag: DW_TAG_member, name: "a1", scope: !21, file: !1, line: 1, baseType: !14, size: 32)
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!24 = !DIDerivedType(tag: DW_TAG_member, name: "a2", scope: !21, file: !1, line: 1, baseType: !25, size: 16, offset: 32)
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!25 = !DIBasicType(name: "short", size: 16, encoding: DW_ATE_signed)
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!26 = !{!27, !28, !29}
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!27 = !DILocalVariable(name: "arg", arg: 1, scope: !11, file: !1, line: 4, type: !15)
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!28 = !DILocalVariable(name: "r1", scope: !11, file: !1, line: 5, type: !4)
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!29 = !DILocalVariable(name: "r2", scope: !11, file: !1, line: 6, type: !4)
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!30 = !DILocation(line: 0, scope: !11)
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!31 = !DILocation(line: 5, column: 52, scope: !11)
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!32 = !DILocation(line: 5, column: 55, scope: !11)
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!33 = !DILocation(line: 5, column: 17, scope: !11)
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!34 = !DILocation(line: 6, column: 55, scope: !11)
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!35 = !DILocation(line: 6, column: 17, scope: !11)
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!36 = !DILocation(line: 9, column: 13, scope: !11)
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!37 = !DILocation(line: 9, column: 3, scope: !11)
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