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llvm-project/llvm/test/CodeGen/BPF/BTF/global-var-inited.ll

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[BPF] handle external global properly Previous commit 6bc58e6d3dbd ("[BPF] do not generate unused local/global types") tried to exclude global variable from type generation. The condition is: if (Global.hasExternalLinkage()) continue; This is not right. It also excluded initialized globals. The correct condition (from AssemblyWriter::printGlobal()) is: if (!GV->hasInitializer() && GV->hasExternalLinkage()) Out << "external "; Let us do the same in BTF type generation. Also added a test for it. Signed-off-by: Yonghong Song <yhs@fb.com> llvm-svn: 356279
2019-03-16 01:39:10 +08:00
; 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:
; int a = 3;
; Compilation flag:
; clang -target bpf -O2 -g -S -emit-llvm test.c
@a = dso_local local_unnamed_addr global i32 3, align 4, !dbg !0
; 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
[BPF] generate BTF_KIND_VARs for all non-static globals Enable to generate BTF_KIND_VARs for non-static default-section globals which is not allowed previously. Modified the existing test case to accommodate the new change. Also removed unused linkage enum members VAR_GLOBAL_TENTATIVE and VAR_GLOBAL_EXTERNAL. Differential Revision: https://reviews.llvm.org/D70145
2019-11-13 03:31:52 +08:00
; CHECK-NEXT: .long 56
; CHECK-NEXT: .long 56
; CHECK-NEXT: .long 13
[BPF] handle external global properly Previous commit 6bc58e6d3dbd ("[BPF] do not generate unused local/global types") tried to exclude global variable from type generation. The condition is: if (Global.hasExternalLinkage()) continue; This is not right. It also excluded initialized globals. The correct condition (from AssemblyWriter::printGlobal()) is: if (!GV->hasInitializer() && GV->hasExternalLinkage()) Out << "external "; Let us do the same in BTF type generation. Also added a test for it. Signed-off-by: Yonghong Song <yhs@fb.com> llvm-svn: 356279
2019-03-16 01:39:10 +08:00
; CHECK-NEXT: .long 1 # BTF_KIND_INT(id = 1)
; CHECK-NEXT: .long 16777216 # 0x1000000
; CHECK-NEXT: .long 4
; CHECK-NEXT: .long 16777248 # 0x1000020
[BPF] generate BTF_KIND_VARs for all non-static globals Enable to generate BTF_KIND_VARs for non-static default-section globals which is not allowed previously. Modified the existing test case to accommodate the new change. Also removed unused linkage enum members VAR_GLOBAL_TENTATIVE and VAR_GLOBAL_EXTERNAL. Differential Revision: https://reviews.llvm.org/D70145
2019-11-13 03:31:52 +08:00
; CHECK-NEXT: .long 5 # BTF_KIND_VAR(id = 2)
; CHECK-NEXT: .long 234881024 # 0xe000000
; CHECK-NEXT: .long 1
; CHECK-NEXT: .long 1
; CHECK-NEXT: .long 7 # BTF_KIND_DATASEC(id = 3)
; CHECK-NEXT: .long 251658241 # 0xf000001
; CHECK-NEXT: .long 0
; CHECK-NEXT: .long 2
; CHECK-NEXT: .long a
; CHECK-NEXT: .long 4
[BPF] handle external global properly Previous commit 6bc58e6d3dbd ("[BPF] do not generate unused local/global types") tried to exclude global variable from type generation. The condition is: if (Global.hasExternalLinkage()) continue; This is not right. It also excluded initialized globals. The correct condition (from AssemblyWriter::printGlobal()) is: if (!GV->hasInitializer() && GV->hasExternalLinkage()) Out << "external "; Let us do the same in BTF type generation. Also added a test for it. Signed-off-by: Yonghong Song <yhs@fb.com> llvm-svn: 356279
2019-03-16 01:39:10 +08:00
; CHECK-NEXT: .byte 0 # string offset=0
; CHECK-NEXT: .ascii "int" # string offset=1
; CHECK-NEXT: .byte 0
[BPF] generate BTF_KIND_VARs for all non-static globals Enable to generate BTF_KIND_VARs for non-static default-section globals which is not allowed previously. Modified the existing test case to accommodate the new change. Also removed unused linkage enum members VAR_GLOBAL_TENTATIVE and VAR_GLOBAL_EXTERNAL. Differential Revision: https://reviews.llvm.org/D70145
2019-11-13 03:31:52 +08:00
; CHECK-NEXT: .byte 97 # string offset=5
; CHECK-NEXT: .byte 0
; CHECK-NEXT: .ascii ".data" # string offset=7
; CHECK-NEXT: .byte 0
[BPF] handle external global properly Previous commit 6bc58e6d3dbd ("[BPF] do not generate unused local/global types") tried to exclude global variable from type generation. The condition is: if (Global.hasExternalLinkage()) continue; This is not right. It also excluded initialized globals. The correct condition (from AssemblyWriter::printGlobal()) is: if (!GV->hasInitializer() && GV->hasExternalLinkage()) Out << "external "; Let us do the same in BTF type generation. Also added a test for it. Signed-off-by: Yonghong Song <yhs@fb.com> llvm-svn: 356279
2019-03-16 01:39:10 +08:00
!llvm.dbg.cu = !{!2}
!llvm.module.flags = !{!7, !8, !9}
!llvm.ident = !{!10}
!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
!1 = distinct !DIGlobalVariable(name: "a", scope: !2, file: !3, line: 1, type: !6, isLocal: false, isDefinition: true)
!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 8.0.20181009 ", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5, nameTableKind: None)
!3 = !DIFile(filename: "test.c", directory: "/home/yhs/work/tests/llvm/bug")
!4 = !{}
!5 = !{!0}
!6 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!7 = !{i32 2, !"Dwarf Version", i32 4}
!8 = !{i32 2, !"Debug Info Version", i32 3}
!9 = !{i32 1, !"wchar_size", i32 4}
!10 = !{!"clang version 8.0.20181009 "}