static-var.ll
6.42 KB
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; RUN: llc -march=bpfel -filetype=asm -o - %s | FileCheck -check-prefixes=CHECK %s
; RUN: llc -march=bpfeb -filetype=asm -o - %s | FileCheck -check-prefixes=CHECK %s
; Source code:
; static volatile char a;
; int foo() {
; static volatile short b;
; return a + b;
; }
; Compilation flag:
; clang -target bpf -O2 -g -S -emit-llvm test.c
@foo.b = internal global i16 0, align 2, !dbg !0
@a = internal global i8 0, align 1, !dbg !10
; Function Attrs: norecurse nounwind
define dso_local i32 @foo() local_unnamed_addr #0 !dbg !2 {
%1 = load volatile i8, i8* @a, align 1, !dbg !20, !tbaa !21
%2 = sext i8 %1 to i32, !dbg !20
%3 = load volatile i16, i16* @foo.b, align 2, !dbg !24, !tbaa !25
%4 = sext i16 %3 to i32, !dbg !24
%5 = add nsw i32 %4, %2, !dbg !27
ret i32 %5, !dbg !28
}
; CHECK: .section .BTF,"",@progbits
; CHECK-NEXT: .short 60319 # 0xeb9f
; CHECK-NEXT: .byte 1
; CHECK-NEXT: .byte 0
; CHECK-NEXT: .long 24
; CHECK-NEXT: .long 0
; CHECK-NEXT: .long 164
; CHECK-NEXT: .long 164
; CHECK-NEXT: .long 76
; CHECK-NEXT: .long 0 # BTF_KIND_FUNC_PROTO(id = 1)
; CHECK-NEXT: .long 218103808 # 0xd000000
; CHECK-NEXT: .long 2
; CHECK-NEXT: .long 1 # BTF_KIND_INT(id = 2)
; CHECK-NEXT: .long 16777216 # 0x1000000
; CHECK-NEXT: .long 4
; CHECK-NEXT: .long 16777248 # 0x1000020
; CHECK-NEXT: .long 5 # BTF_KIND_FUNC(id = 3)
; CHECK-NEXT: .long 201326593 # 0xc000001
; CHECK-NEXT: .long 1
; CHECK-NEXT: .long 0 # BTF_KIND_VOLATILE(id = 4)
; CHECK-NEXT: .long 150994944 # 0x9000000
; CHECK-NEXT: .long 5
; CHECK-NEXT: .long 52 # BTF_KIND_INT(id = 5)
; CHECK-NEXT: .long 16777216 # 0x1000000
; CHECK-NEXT: .long 2
; CHECK-NEXT: .long 16777232 # 0x1000010
; CHECK-NEXT: .long 58 # BTF_KIND_VAR(id = 6)
; CHECK-NEXT: .long 234881024 # 0xe000000
; CHECK-NEXT: .long 4
; CHECK-NEXT: .long 0
; CHECK-NEXT: .long 0 # BTF_KIND_VOLATILE(id = 7)
; CHECK-NEXT: .long 150994944 # 0x9000000
; CHECK-NEXT: .long 8
; CHECK-NEXT: .long 64 # BTF_KIND_INT(id = 8)
; CHECK-NEXT: .long 16777216 # 0x1000000
; CHECK-NEXT: .long 1
; CHECK-NEXT: .long 16777224 # 0x1000008
; CHECK-NEXT: .long 69 # BTF_KIND_VAR(id = 9)
; CHECK-NEXT: .long 234881024 # 0xe000000
; CHECK-NEXT: .long 7
; CHECK-NEXT: .long 0
; CHECK-NEXT: .long 71 # BTF_KIND_DATASEC(id = 10)
; CHECK-NEXT: .long 251658242 # 0xf000002
; CHECK-NEXT: .long 0
; CHECK-NEXT: .long 6
; CHECK-NEXT: .long foo.b
; CHECK-NEXT: .long 2
; CHECK-NEXT: .long 9
; CHECK-NEXT: .long a
; CHECK-NEXT: .long 1
; CHECK-NEXT: .byte 0 # string offset=0
; CHECK-NEXT: .ascii "int" # string offset=1
; CHECK-NEXT: .byte 0
; CHECK-NEXT: .ascii "foo" # string offset=5
; CHECK-NEXT: .byte 0
; CHECK-NEXT: .ascii ".text" # string offset=9
; CHECK-NEXT: .byte 0
; CHECK-NEXT: .ascii "/home/yhs/work/tests/llvm/bug/test.c" # string offset=15
; CHECK-NEXT: .byte 0
; CHECK-NEXT: .ascii "short" # string offset=52
; CHECK-NEXT: .byte 0
; CHECK-NEXT: .ascii "foo.b" # string offset=58
; CHECK-NEXT: .byte 0
; CHECK-NEXT: .ascii "char" # string offset=64
; CHECK-NEXT: .byte 0
; CHECK-NEXT: .byte 97 # string offset=69
; CHECK-NEXT: .byte 0
; CHECK-NEXT: .ascii ".bss" # string offset=71
; CHECK-NEXT: .byte 0
attributes #0 = { norecurse nounwind "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="all" "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" }
!llvm.dbg.cu = !{!7}
!llvm.module.flags = !{!16, !17, !18}
!llvm.ident = !{!19}
!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
!1 = distinct !DIGlobalVariable(name: "b", scope: !2, file: !3, line: 3, type: !14, isLocal: true, isDefinition: true)
!2 = distinct !DISubprogram(name: "foo", scope: !3, file: !3, line: 2, type: !4, isLocal: false, isDefinition: true, scopeLine: 2, isOptimized: true, unit: !7, retainedNodes: !8)
!3 = !DIFile(filename: "test.c", directory: "/home/yhs/work/tests/llvm/bug")
!4 = !DISubroutineType(types: !5)
!5 = !{!6}
!6 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!7 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 8.0.20181009 ", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !8, globals: !9, nameTableKind: None)
!8 = !{}
!9 = !{!0, !10}
!10 = !DIGlobalVariableExpression(var: !11, expr: !DIExpression())
!11 = distinct !DIGlobalVariable(name: "a", scope: !7, file: !3, line: 1, type: !12, isLocal: true, isDefinition: true)
!12 = !DIDerivedType(tag: DW_TAG_volatile_type, baseType: !13)
!13 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)
!14 = !DIDerivedType(tag: DW_TAG_volatile_type, baseType: !15)
!15 = !DIBasicType(name: "short", size: 16, encoding: DW_ATE_signed)
!16 = !{i32 2, !"Dwarf Version", i32 4}
!17 = !{i32 2, !"Debug Info Version", i32 3}
!18 = !{i32 1, !"wchar_size", i32 4}
!19 = !{!"clang version 8.0.20181009 "}
!20 = !DILocation(line: 4, column: 10, scope: !2)
!21 = !{!22, !22, i64 0}
!22 = !{!"omnipotent char", !23, i64 0}
!23 = !{!"Simple C/C++ TBAA"}
!24 = !DILocation(line: 4, column: 14, scope: !2)
!25 = !{!26, !26, i64 0}
!26 = !{!"short", !22, i64 0}
!27 = !DILocation(line: 4, column: 12, scope: !2)
!28 = !DILocation(line: 4, column: 3, scope: !2)