d46a6a9e68
Previously, patchable extern relocations are introduced to patch external variables used for multi versioning in compile once, run everywhere use case. The load instruction will be converted into a move with an patchable immediate which can be changed by bpf loader on the host. The kernel verifier has evolved and is able to load and propagate constant values, so compiler relocation becomes unnecessary. This patch removed codes related to this. Differential Revision: https://reviews.llvm.org/D68760 llvm-svn: 374367
131 lines
6.6 KiB
LLVM
131 lines
6.6 KiB
LLVM
; RUN: llc -march=bpfel -filetype=asm -o - %s | FileCheck -check-prefixes=CHECK %s
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; RUN: llc -march=bpfeb -filetype=asm -o - %s | FileCheck -check-prefixes=CHECK %s
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; Source code:
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; void (*a1)(int p1);
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; struct t1 { void (*a1)(int p1); } b1;
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; void f1(int p2) { }
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; Compilation flag:
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; clang -target bpf -O2 -g -S -emit-llvm t.c
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%struct.t1 = type { void (i32)* }
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@a1 = common dso_local local_unnamed_addr global void (i32)* null, align 8, !dbg !0
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@b1 = common dso_local local_unnamed_addr global %struct.t1 zeroinitializer, align 8, !dbg !6
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; Function Attrs: nounwind readnone
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define dso_local void @f1(i32 %p2) local_unnamed_addr #0 !dbg !19 {
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entry:
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call void @llvm.dbg.value(metadata i32 %p2, metadata !21, metadata !DIExpression()), !dbg !22
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ret void, !dbg !23
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}
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; CHECK: .section .BTF,"",@progbits
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; CHECK-NEXT: .short 60319 # 0xeb9f
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; CHECK-NEXT: .byte 1
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; CHECK-NEXT: .byte 0
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; CHECK-NEXT: .long 24
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; CHECK-NEXT: .long 0
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; CHECK-NEXT: .long 104
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; CHECK-NEXT: .long 104
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; CHECK-NEXT: .long 32
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; CHECK-NEXT: .long 1 # BTF_KIND_INT(id = 1)
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; CHECK-NEXT: .long 16777216 # 0x1000000
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; CHECK-NEXT: .long 4
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; CHECK-NEXT: .long 16777248 # 0x1000020
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; CHECK-NEXT: .long 0 # BTF_KIND_FUNC_PROTO(id = 2)
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; CHECK-NEXT: .long 218103809 # 0xd000001
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; CHECK-NEXT: .long 0
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; CHECK-NEXT: .long 5
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; CHECK-NEXT: .long 1
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; CHECK-NEXT: .long 8 # BTF_KIND_FUNC(id = 3)
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; CHECK-NEXT: .long 201326592 # 0xc000000
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; CHECK-NEXT: .long 2
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; CHECK-NEXT: .long 0 # BTF_KIND_PTR(id = 4)
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; CHECK-NEXT: .long 33554432 # 0x2000000
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; CHECK-NEXT: .long 5
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; CHECK-NEXT: .long 0 # BTF_KIND_FUNC_PROTO(id = 5)
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; CHECK-NEXT: .long 218103809 # 0xd000001
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; CHECK-NEXT: .long 0
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; CHECK-NEXT: .long 0
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; CHECK-NEXT: .long 1
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; CHECK-NEXT: .long 26 # BTF_KIND_STRUCT(id = 6)
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; CHECK-NEXT: .long 67108865 # 0x4000001
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; CHECK-NEXT: .long 8
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; CHECK-NEXT: .long 29
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; CHECK-NEXT: .long 4
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; CHECK-NEXT: .long 0 # 0x0
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; CHECK-NEXT: .byte 0 # string offset=0
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; CHECK-NEXT: .ascii "int" # string offset=1
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; CHECK-NEXT: .byte 0
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; CHECK-NEXT: .ascii "p2" # string offset=5
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; CHECK-NEXT: .byte 0
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; CHECK-NEXT: .ascii "f1" # string offset=8
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; CHECK-NEXT: .byte 0
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; CHECK-NEXT: .ascii ".text" # string offset=11
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; CHECK-NEXT: .byte 0
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; CHECK-NEXT: .ascii "/tmp/t.c" # string offset=17
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; CHECK-NEXT: .byte 0
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; CHECK-NEXT: .ascii "t1" # string offset=26
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; CHECK-NEXT: .byte 0
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; CHECK-NEXT: .ascii "a1" # string offset=29
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; CHECK-NEXT: .byte 0
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; CHECK-NEXT: .section .BTF.ext,"",@progbits
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; CHECK-NEXT: .short 60319 # 0xeb9f
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; CHECK-NEXT: .byte 1
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; CHECK-NEXT: .byte 0
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; CHECK-NEXT: .long 32
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; CHECK-NEXT: .long 0
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; CHECK-NEXT: .long 20
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; CHECK-NEXT: .long 20
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; CHECK-NEXT: .long 28
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; CHECK-NEXT: .long 48
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; CHECK-NEXT: .long 0
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; CHECK-NEXT: .long 8 # FuncInfo
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; CHECK-NEXT: .long 11 # FuncInfo section string offset=11
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; CHECK-NEXT: .long 1
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; CHECK-NEXT: .long .Lfunc_begin0
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; CHECK-NEXT: .long 3
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; CHECK-NEXT: .long 16 # LineInfo
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; CHECK-NEXT: .long 11 # LineInfo section string offset=11
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; CHECK-NEXT: .long 1
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; CHECK-NEXT: .long .Ltmp{{[0-9]+}}
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; CHECK-NEXT: .long 17
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; CHECK-NEXT: .long 0
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; CHECK-NEXT: .long 3091 # Line 3 Col 19
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; Function Attrs: nounwind readnone speculatable
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declare void @llvm.dbg.value(metadata, metadata, metadata) #1
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attributes #0 = { nounwind readnone "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "min-legal-vector-width"="0" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "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 speculatable }
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!llvm.dbg.cu = !{!2}
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!llvm.module.flags = !{!15, !16, !17}
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!llvm.ident = !{!18}
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!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
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!1 = distinct !DIGlobalVariable(name: "a1", scope: !2, file: !3, line: 1, type: !11, isLocal: false, isDefinition: true)
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!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 8.0.0 (trunk 345296) (llvm/trunk 345297)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5, nameTableKind: None)
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!3 = !DIFile(filename: "t.c", directory: "/tmp")
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!4 = !{}
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!5 = !{!0, !6}
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!6 = !DIGlobalVariableExpression(var: !7, expr: !DIExpression())
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!7 = distinct !DIGlobalVariable(name: "b1", scope: !2, file: !3, line: 2, type: !8, isLocal: false, isDefinition: true)
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!8 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "t1", file: !3, line: 2, size: 64, elements: !9)
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!9 = !{!10}
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!10 = !DIDerivedType(tag: DW_TAG_member, name: "a1", scope: !8, file: !3, line: 2, baseType: !11, size: 64)
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!11 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !12, size: 64)
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!12 = !DISubroutineType(types: !13)
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!13 = !{null, !14}
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!14 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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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 8.0.0 (trunk 345296) (llvm/trunk 345297)"}
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!19 = distinct !DISubprogram(name: "f1", scope: !3, file: !3, line: 3, type: !12, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: true, unit: !2, retainedNodes: !20)
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!20 = !{!21}
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!21 = !DILocalVariable(name: "p2", arg: 1, scope: !19, file: !3, line: 3, type: !14)
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!22 = !DILocation(line: 3, column: 13, scope: !19)
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!23 = !DILocation(line: 3, column: 19, scope: !19)
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