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a9f5119a78
Debug info emission for extern variables in C++ was previously disabled when the functionality was added in https://reviews.llvm.org/D71818 and originally in https://reviews.llvm.org/D70696, because there was no use case. We are enabling it now, as we start to deploy BPF programs compiled from C++, leveraging C++ features like templates to reduce code complexity. This patch is required so that we can still use kconfig in such BPF programs compiled from C++. Reviewed By: rnk, dblaikie, MaskRay, yonghong-song Differential Revision: https://reviews.llvm.org/D153898
26 lines
1.1 KiB
C++
26 lines
1.1 KiB
C++
// RUN: %clang_cc1 -x c++ -debug-info-kind=limited -triple bpf-linux-gnu -emit-llvm %s -o - | FileCheck %s
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namespace foo {
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template <typename T>
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struct S {
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T x;
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};
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extern S<char> s;
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int test(void) {
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return s.x;
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}
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} // namespace foo
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// CHECK: distinct !DIGlobalVariable(name: "s", scope: ![[NAMESPACE:[0-9]+]],{{.*}} type: ![[STRUCT_TYPE:[0-9]+]], isLocal: false, isDefinition: false)
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// CHECK: ![[NAMESPACE]] = !DINamespace(name: "foo", scope: null)
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// CHECK: ![[STRUCT_TYPE]] = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "S<char>",{{.*}}size: 8, flags: DIFlagTypePassByValue, elements: ![[ELEMENT_TYPE:[0-9]+]], templateParams: ![[TEMPLATE_TYPE:[0-9]+]], identifier: "_ZTSN3foo1SIcEE")
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// CHECK: ![[ELEMENT_TYPE]] = !{![[ELEMENT_TYPE:[0-9]+]]}
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// CHECK: ![[ELEMENT_TYPE]] = !DIDerivedType(tag: DW_TAG_member, name: "x",{{.*}} baseType: ![[BASE_TYPE:[0-9]+]], size: 8)
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// CHECK: ![[BASE_TYPE]] = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)
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// CHECK: ![[TEMPLATE_TYPE]] = !{![[TEMPLATE_TYPE:[0-9]+]]}
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// CHECK: ![[TEMPLATE_TYPE]] = !DITemplateTypeParameter(name: "T", type: ![[BASE_TYPE]])
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