eddyz87 updated this revision to Diff 523233.
eddyz87 added a comment.
Fix for case when CVR qualifier is behind type ignored by
UnwrapTypeForDebugInfo().
E.g. for the following example:
const int *foo;
typeof(*foo) __attribute__((btf_type_tag("tag"))) buz;
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D143967/new/
https://reviews.llvm.org/D143967
Files:
clang/lib/CodeGen/CGDebugInfo.cpp
clang/lib/CodeGen/CGDebugInfo.h
clang/test/CodeGen/attr-btf_type_tag-circular.c
clang/test/CodeGen/attr-btf_type_tag-const.c
clang/test/CodeGen/attr-btf_type_tag-func-ptr.c
clang/test/CodeGen/attr-btf_type_tag-func.c
clang/test/CodeGen/attr-btf_type_tag-restrict.c
clang/test/CodeGen/attr-btf_type_tag-similar-type.c
clang/test/CodeGen/attr-btf_type_tag-typedef-field.c
clang/test/CodeGen/attr-btf_type_tag-var.c
clang/test/CodeGen/attr-btf_type_tag-void.c
clang/test/CodeGen/attr-btf_type_tag-volatile.c
llvm/include/llvm/IR/DIBuilder.h
llvm/lib/IR/DIBuilder.cpp
Index: llvm/lib/IR/DIBuilder.cpp
===================================================================
--- llvm/lib/IR/DIBuilder.cpp
+++ llvm/lib/IR/DIBuilder.cpp
@@ -352,6 +352,17 @@
Annotations);
}
+DIDerivedType *
+DIBuilder::createAnnotationsPlaceholder(DIType *Ty, DINodeArray Annotations) {
+ auto *RetTy =
+ DIDerivedType::getTemporary(
+ VMContext, dwarf::DW_TAG_LLVM_annotation, "", nullptr, 0, nullptr, Ty,
+ 0, 0, 0, std::nullopt, DINode::FlagZero, nullptr, Annotations)
+ .release();
+ trackIfUnresolved(RetTy);
+ return RetTy;
+}
+
DIDerivedType *DIBuilder::createFriend(DIType *Ty, DIType *FriendTy) {
assert(Ty && "Invalid type!");
assert(FriendTy && "Invalid friend type!");
Index: llvm/include/llvm/IR/DIBuilder.h
===================================================================
--- llvm/include/llvm/IR/DIBuilder.h
+++ llvm/include/llvm/IR/DIBuilder.h
@@ -284,6 +284,9 @@
DINode::DIFlags Flags = DINode::FlagZero,
DINodeArray Annotations = nullptr);
+ DIDerivedType *createAnnotationsPlaceholder(DIType *Ty,
+ DINodeArray Annotations);
+
/// Create debugging information entry for a 'friend'.
DIDerivedType *createFriend(DIType *Ty, DIType *FriendTy);
Index: clang/test/CodeGen/attr-btf_type_tag-volatile.c
===================================================================
--- /dev/null
+++ clang/test/CodeGen/attr-btf_type_tag-volatile.c
@@ -0,0 +1,18 @@
+// RUN: %clang_cc1 \
+// RUN: -triple %itanium_abi_triple -debug-info-kind=limited \
+// RUN: -S -emit-llvm -o - %s | FileCheck %s
+
+// See attr-btf_type_tag-const.c for reasoning behind this test.
+// Alternatively, see the following method:
+// CGDebugInfo::CreateType(const BTFTagAttributedType, llvm::DIFile)
+
+#define __tag1 __attribute__((btf_type_tag("tag1")))
+
+volatile int foo;
+typeof(foo) __tag1 bar;
+
+// CHECK: ![[#]] = distinct !DIGlobalVariable(name: "bar", {{.*}}, type: ![[L1:[0-9]+]], {{.*}})
+// CHECK: ![[L1]] = !DIDerivedType(tag: DW_TAG_volatile_type, baseType: ![[L2:[0-9]+]])
+// CHECK: ![[L2]] = !DIBasicType(name: "int", size: [[#]], {{.*}}, annotations: ![[L3:[0-9]+]])
+// CHECK: ![[L3]] = !{![[L4:[0-9]+]]}
+// CHECK: ![[L4]] = !{!"btf:type_tag", !"tag1"}
Index: clang/test/CodeGen/attr-btf_type_tag-void.c
===================================================================
--- /dev/null
+++ clang/test/CodeGen/attr-btf_type_tag-void.c
@@ -0,0 +1,12 @@
+// RUN: %clang_cc1 -triple %itanium_abi_triple -debug-info-kind=limited -S -emit-llvm -o - %s | FileCheck %s
+
+#define __tag1 __attribute__((btf_type_tag("tag1")))
+void __tag1 *g;
+
+// CHECK: distinct !DIGlobalVariable(name: "g", scope: ![[#]], file: ![[#]], line: [[#]], type: ![[L1:[0-9]+]], isLocal: false, isDefinition: true)
+// CHECK: ![[L1]] = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: ![[L2:[0-9]+]], size: [[#]], annotations: ![[L3:[0-9]+]])
+// CHECK: ![[L2]] = !DIBasicType(tag: DW_TAG_unspecified_type, name: "void", annotations: ![[L4:[0-9]+]])
+// CHECK: ![[L4]] = !{![[L5:[0-9]+]]}
+// CHECK: ![[L5]] = !{!"btf:type_tag", !"tag1"}
+// CHECK: ![[L3]] = !{![[L6:[0-9]+]]}
+// CHECK: ![[L6]] = !{!"btf_type_tag", !"tag1"}
Index: clang/test/CodeGen/attr-btf_type_tag-var.c
===================================================================
--- clang/test/CodeGen/attr-btf_type_tag-var.c
+++ clang/test/CodeGen/attr-btf_type_tag-var.c
@@ -21,23 +21,30 @@
const int __tag1 __tag2 volatile * const __tag3 __tag4 volatile * __tag5 __tag6 const volatile * g;
#endif
-// CHECK: distinct !DIGlobalVariable(name: "g", scope: ![[#]], file: ![[#]], line: [[#]], type: ![[L6:[0-9]+]]
-// CHECK: ![[L6]] = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: ![[L7:[0-9]+]], size: [[#]], annotations: ![[L22:[0-9]+]]
-// CHECK: ![[L7]] = !DIDerivedType(tag: DW_TAG_const_type, baseType: ![[L8:[0-9]+]]
-// CHECK: ![[L8]] = !DIDerivedType(tag: DW_TAG_volatile_type, baseType: ![[L9:[0-9]+]]
-// CHECK: ![[L9]] = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: ![[L10:[0-9]+]], size: [[#]], annotations: ![[L19:[0-9]+]]
-// CHECK: ![[L10]] = !DIDerivedType(tag: DW_TAG_const_type, baseType: ![[L11:[0-9]+]]
-// CHECK: ![[L11]] = !DIDerivedType(tag: DW_TAG_volatile_type, baseType: ![[L12:[0-9]+]]
-// CHECK: ![[L12]] = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: ![[L13:[0-9]+]], size: [[#]], annotations: ![[L16:[0-9]+]]
-// CHECK: ![[L13]] = !DIDerivedType(tag: DW_TAG_const_type, baseType: ![[L14:[0-9]+]]
-// CHECK: ![[L14]] = !DIDerivedType(tag: DW_TAG_volatile_type, baseType: ![[L15:[0-9]+]]
-// CHECK: ![[L15]] = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed
-// CHECK: ![[L16]] = !{![[L17:[0-9]+]], ![[L18:[0-9]+]]}
-// CHECK: ![[L17]] = !{!"btf_type_tag", !"tag1"}
-// CHECK: ![[L18]] = !{!"btf_type_tag", !"tag2"}
-// CHECK: ![[L19]] = !{![[L20:[0-9]+]], ![[L21:[0-9]+]]}
-// CHECK: ![[L20]] = !{!"btf_type_tag", !"tag3"}
-// CHECK: ![[L21]] = !{!"btf_type_tag", !"tag4"}
-// CHECK: ![[L22]] = !{![[L23:[0-9]+]], ![[L24:[0-9]+]]}
-// CHECK: ![[L23]] = !{!"btf_type_tag", !"tag5"}
-// CHECK: ![[L24]] = !{!"btf_type_tag", !"tag6"}
+// CHECK: distinct !DIGlobalVariable(name: "g", scope: ![[#]], file: ![[#]], line: [[#]], type: ![[L01:[0-9]+]], isLocal: false, isDefinition: true)
+// CHECK: ![[L01]] = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: ![[L02:[0-9]+]], size: [[#]], annotations: ![[L03:[0-9]+]])
+// CHECK: ![[L02]] = !DIDerivedType(tag: DW_TAG_const_type, baseType: ![[L04:[0-9]+]])
+// CHECK: ![[L04]] = !DIDerivedType(tag: DW_TAG_volatile_type, baseType: ![[L05:[0-9]+]])
+// CHECK: ![[L05]] = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: ![[L06:[0-9]+]], size: [[#]], annotations: ![[L07:[0-9]+]])
+// CHECK: ![[L06]] = !DIDerivedType(tag: DW_TAG_const_type, baseType: ![[L08:[0-9]+]])
+// CHECK: ![[L08]] = !DIDerivedType(tag: DW_TAG_volatile_type, baseType: ![[L09:[0-9]+]])
+// CHECK: ![[L09]] = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: ![[L10:[0-9]+]], size: [[#]], annotations: ![[L11:[0-9]+]])
+// CHECK: ![[L10]] = !DIDerivedType(tag: DW_TAG_const_type, baseType: ![[L12:[0-9]+]])
+// CHECK: ![[L12]] = !DIDerivedType(tag: DW_TAG_volatile_type, baseType: ![[L13:[0-9]+]])
+// CHECK: ![[L13]] = !DIBasicType(name: "int", size: [[#]], encoding: DW_ATE_signed, annotations: ![[L14:[0-9]+]])
+// CHECK: ![[L14]] = !{![[L15:[0-9]+]], ![[L16:[0-9]+]]}
+// CHECK: ![[L15]] = !{!"btf:type_tag", !"tag1"}
+// CHECK: ![[L16]] = !{!"btf:type_tag", !"tag2"}
+// CHECK: ![[L11]] = !{![[L17:[0-9]+]], ![[L18:[0-9]+]], ![[L19:[0-9]+]], ![[L20:[0-9]+]]}
+// CHECK: ![[L17]] = !{!"btf:type_tag", !"tag3"}
+// CHECK: ![[L18]] = !{!"btf:type_tag", !"tag4"}
+// CHECK: ![[L19]] = !{!"btf_type_tag", !"tag1"}
+// CHECK: ![[L20]] = !{!"btf_type_tag", !"tag2"}
+// CHECK: ![[L07]] = !{![[L21:[0-9]+]], ![[L22:[0-9]+]], ![[L23:[0-9]+]], ![[L24:[0-9]+]]}
+// CHECK: ![[L21]] = !{!"btf:type_tag", !"tag5"}
+// CHECK: ![[L22]] = !{!"btf:type_tag", !"tag6"}
+// CHECK: ![[L23]] = !{!"btf_type_tag", !"tag3"}
+// CHECK: ![[L24]] = !{!"btf_type_tag", !"tag4"}
+// CHECK: ![[L03]] = !{![[L25:[0-9]+]], ![[L26:[0-9]+]]}
+// CHECK: ![[L25]] = !{!"btf_type_tag", !"tag5"}
+// CHECK: ![[L26]] = !{!"btf_type_tag", !"tag6"}
Index: clang/test/CodeGen/attr-btf_type_tag-typedef-field.c
===================================================================
--- clang/test/CodeGen/attr-btf_type_tag-typedef-field.c
+++ clang/test/CodeGen/attr-btf_type_tag-typedef-field.c
@@ -14,22 +14,27 @@
return (int *)a1->c;
}
-// CHECK: ![[L4:[0-9]+]] = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
-// CHECK: distinct !DICompositeType(tag: DW_TAG_structure_type, name: "t", file: ![[#]], line: [[#]], size: [[#]], elements: ![[L16:[0-9]+]])
-// CHECK: ![[L16]] = !{![[L17:[0-9]+]], ![[L24:[0-9]+]], ![[L31:[0-9]+]]}
-// CHECK: ![[L17]] = !DIDerivedType(tag: DW_TAG_member, name: "a", scope: ![[#]], file: ![[#]], line: [[#]], baseType: ![[L18:[0-9]+]], size: [[#]])
-// CHECK: ![[L18]] = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: ![[L19:[0-9]+]], size: [[#]], annotations: ![[L22:[0-9]+]])
-// CHECK: ![[L19]] = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: ![[L4]], size: [[#]], annotations: ![[L20:[0-9]+]])
-// CHECK: ![[L20]] = !{![[L21:[0-9]+]]}
-// CHECK: ![[L21]] = !{!"btf_type_tag", !"tag1"}
-// CHECK: ![[L22]] = !{![[L23:[0-9]+]]}
-// CHECK: ![[L23]] = !{!"btf_type_tag", !"tag2"}
-// CHECK: ![[L24]] = !DIDerivedType(tag: DW_TAG_member, name: "b", scope: ![[#]], file: ![[#]], line: [[#]], baseType: ![[L25:[0-9]+]]
-// CHECK: ![[L25]] = !DIDerivedType(tag: DW_TAG_typedef, name: "__fn2_t", file: ![[#]], line: [[#]], baseType: ![[L26:[0-9]+]])
-// CHECK: ![[L26]] = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: ![[L27:[0-9]+]], size: [[#]], annotations: ![[L30:[0-9]+]])
-// CHECK: ![[L27]] = !DIDerivedType(tag: DW_TAG_typedef, name: "__fn_t", file: ![[#]], line: [[#]], baseType: ![[L28:[0-9]+]])
-// CHECK: ![[L28]] = !DISubroutineType(types: ![[L29:[0-9]+]])
-// CHECK: ![[L29]] = !{null, ![[L4]]}
-// CHECK: ![[L30]] = !{![[L21]], ![[L23]]}
-// CHECK: ![[L31]] = !DIDerivedType(tag: DW_TAG_member, name: "c", scope: ![[#]], file: ![[#]], line: [[#]]1, baseType: ![[L32:[0-9]+]]
-// CHECK: ![[L32]] = !DIBasicType(name: "long", size: [[#]], encoding: DW_ATE_signed)
+// CHECK: ![[L01:[0-9]+]] = !DIBasicType(name: "int", size: [[#]], encoding: DW_ATE_signed)
+// CHECK: distinct !DICompositeType(tag: DW_TAG_structure_type, name: "t", file: ![[#]], line: [[#]], size: [[#]], elements: ![[L02:[0-9]+]])
+// CHECK: ![[L02]] = !{![[L03:[0-9]+]], ![[L04:[0-9]+]], ![[L05:[0-9]+]]}
+// CHECK: ![[L03]] = !DIDerivedType(tag: DW_TAG_member, name: "a", scope: ![[#]], file: ![[#]], line: [[#]], baseType: ![[L06:[0-9]+]], size: [[#]])
+// CHECK: ![[L06]] = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: ![[L07:[0-9]+]], size: [[#]], annotations: ![[L08:[0-9]+]])
+// CHECK: ![[L07]] = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: ![[L09:[0-9]+]], size: [[#]], annotations: ![[L10:[0-9]+]])
+// CHECK: ![[L09]] = !DIBasicType(name: "int", size: [[#]], encoding: DW_ATE_signed, annotations: ![[L11:[0-9]+]])
+// CHECK: ![[L11]] = !{![[L12:[0-9]+]]}
+// CHECK: ![[L12]] = !{!"btf:type_tag", !"tag1"}
+// CHECK: ![[L10]] = !{![[L13:[0-9]+]], ![[L14:[0-9]+]]}
+// CHECK: ![[L13]] = !{!"btf:type_tag", !"tag2"}
+// CHECK: ![[L14]] = !{!"btf_type_tag", !"tag1"}
+// CHECK: ![[L08]] = !{![[L15:[0-9]+]]}
+// CHECK: ![[L15]] = !{!"btf_type_tag", !"tag2"}
+// CHECK: ![[L04]] = !DIDerivedType(tag: DW_TAG_member, name: "b", scope: ![[#]], file: ![[#]], line: [[#]], baseType: ![[L16:[0-9]+]], size: [[#]], offset: [[#]])
+// CHECK: ![[L16]] = !DIDerivedType(tag: DW_TAG_typedef, name: "__fn2_t", file: ![[#]], line: [[#]], baseType: ![[L17:[0-9]+]])
+// CHECK: ![[L17]] = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: ![[L18:[0-9]+]], size: [[#]], annotations: ![[L19:[0-9]+]])
+// CHECK: ![[L18]] = !DIDerivedType(tag: DW_TAG_typedef, name: "__fn_t", file: ![[#]], line: [[#]], baseType: ![[L20:[0-9]+]], annotations: ![[L21:[0-9]+]])
+// CHECK: ![[L20]] = !DISubroutineType(types: ![[L22:[0-9]+]])
+// CHECK: ![[L22]] = !{null, ![[L01]]}
+// CHECK: ![[L21]] = !{![[L12]], ![[L13]]}
+// CHECK: ![[L19]] = !{![[L14]], ![[L15]]}
+// CHECK: ![[L05]] = !DIDerivedType(tag: DW_TAG_member, name: "c", scope: ![[#]], file: ![[#]], line: [[#]], baseType: ![[L23:[0-9]+]], size: [[#]], offset: [[#]])
+// CHECK: ![[L23]] = !DIBasicType(name: "long", size: [[#]], encoding: DW_ATE_signed)
Index: clang/test/CodeGen/attr-btf_type_tag-similar-type.c
===================================================================
--- clang/test/CodeGen/attr-btf_type_tag-similar-type.c
+++ clang/test/CodeGen/attr-btf_type_tag-similar-type.c
@@ -12,15 +12,23 @@
return *arg->a;
}
-// CHECK: distinct !DICompositeType(tag: DW_TAG_structure_type, name: "map_value", file: ![[#]], line: [[#]], size: [[#]], elements: ![[L14:[0-9]+]]
-// CHECK: ![[L14]] = !{![[L15:[0-9]+]], ![[L20:[0-9]+]]}
-// CHECK: ![[L15]] = !DIDerivedType(tag: DW_TAG_member, name: "a", scope: ![[#]], file: ![[#]], line: [[#]], baseType: ![[L16:[0-9]+]]
-// CHECK: ![[L16]] = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: ![[#]], size: [[#]], annotations: ![[L17:[0-9]+]]
-// CHECK: ![[L17]] = !{![[L18:[0-9]+]], ![[L19:[0-9]+]]}
-// CHECK: ![[L18]] = !{!"btf_type_tag", !"tag1"}
-// CHECK: ![[L19]] = !{!"btf_type_tag", !"tag3"}
-// CHECK: ![[L20]] = !DIDerivedType(tag: DW_TAG_member, name: "b", scope: ![[#]], file: ![[#]], line: [[#]], baseType: ![[L21:[0-9]+]]
-// CHECK: ![[L21:[0-9]+]] = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: ![[#]], size: [[#]], annotations: ![[L22:[0-9]+]]
-// CHECK: ![[L22]] = !{![[L23:[0-9]+]], ![[L24:[0-9]+]]}
-// CHECK: ![[L23]] = !{!"btf_type_tag", !"tag2"}
-// CHECK: ![[L24]] = !{!"btf_type_tag", !"tag4"}
+// CHECK: distinct !DICompositeType(tag: DW_TAG_structure_type, name: "map_value", file: ![[#]], line: [[#]], size: [[#]], elements: ![[L01:[0-9]+]])
+// CHECK: ![[L01]] = !{![[L02:[0-9]+]], ![[L03:[0-9]+]]}
+// CHECK: ![[L02]] = !DIDerivedType(tag: DW_TAG_member, name: "a", scope: ![[#]], file: ![[#]], line: [[#]], baseType: ![[L04:[0-9]+]], size: [[#]])
+// CHECK: ![[L04]] = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: ![[L05:[0-9]+]], size: [[#]], annotations: ![[L06:[0-9]+]])
+// CHECK: ![[L05]] = !DIBasicType(name: "int", size: [[#]], encoding: DW_ATE_signed, annotations: ![[L07:[0-9]+]])
+// CHECK: ![[L07]] = !{![[L08:[0-9]+]], ![[L09:[0-9]+]]}
+// CHECK: ![[L08]] = !{!"btf:type_tag", !"tag1"}
+// CHECK: ![[L09]] = !{!"btf:type_tag", !"tag3"}
+// CHECK: ![[L06]] = !{![[L10:[0-9]+]], ![[L11:[0-9]+]]}
+// CHECK: ![[L10]] = !{!"btf_type_tag", !"tag1"}
+// CHECK: ![[L11]] = !{!"btf_type_tag", !"tag3"}
+// CHECK: ![[L03]] = !DIDerivedType(tag: DW_TAG_member, name: "b", scope: ![[#]], file: ![[#]], line: [[#]], baseType: ![[L12:[0-9]+]], size: [[#]], offset: [[#]])
+// CHECK: ![[L12]] = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: ![[L13:[0-9]+]], size: [[#]], annotations: ![[L14:[0-9]+]])
+// CHECK: ![[L13]] = !DIBasicType(name: "int", size: [[#]], encoding: DW_ATE_signed, annotations: ![[L15:[0-9]+]])
+// CHECK: ![[L15]] = !{![[L16:[0-9]+]], ![[L17:[0-9]+]]}
+// CHECK: ![[L16]] = !{!"btf:type_tag", !"tag2"}
+// CHECK: ![[L17]] = !{!"btf:type_tag", !"tag4"}
+// CHECK: ![[L14]] = !{![[L18:[0-9]+]], ![[L19:[0-9]+]]}
+// CHECK: ![[L18]] = !{!"btf_type_tag", !"tag2"}
+// CHECK: ![[L19]] = !{!"btf_type_tag", !"tag4"}
Index: clang/test/CodeGen/attr-btf_type_tag-restrict.c
===================================================================
--- /dev/null
+++ clang/test/CodeGen/attr-btf_type_tag-restrict.c
@@ -0,0 +1,21 @@
+// RUN: %clang_cc1 \
+// RUN: -triple %itanium_abi_triple -debug-info-kind=limited \
+// RUN: -S -emit-llvm -o - %s | FileCheck %s
+
+// See attr-btf_type_tag-const.c for reasoning behind this test.
+// Alternatively, see the following method:
+// CGDebugInfo::CreateType(const BTFTagAttributedType, llvm::DIFile)
+
+#define __tag1 __attribute__((btf_type_tag("tag1")))
+
+void foo(int * restrict bar, typeof(bar) __tag1 buz) {}
+
+// CHECK: ![[#]] = !DISubroutineType(types: ![[L1:[0-9]+]])
+// CHECK: ![[L1]] = !{null, ![[L2:[0-9]+]], ![[L3:[0-9]+]]}
+// CHECK: ![[L2]] = !DIDerivedType(tag: DW_TAG_restrict_type, baseType: ![[L4:[0-9]+]])
+// CHECK: ![[L4]] = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: ![[L5:[0-9]+]], {{.*}})
+// CHECK: ![[L5]] = !DIBasicType(name: "int", {{.*}}, encoding: DW_ATE_signed)
+// CHECK: ![[L3]] = !DIDerivedType(tag: DW_TAG_restrict_type, baseType: ![[L6:[0-9]+]])
+// CHECK: ![[L6]] = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: ![[L5]], {{.*}}, annotations: ![[L7:[0-9]+]])
+// CHECK: ![[L7]] = !{![[L8:[0-9]+]]}
+// CHECK: ![[L8]] = !{!"btf:type_tag", !"tag1"}
Index: clang/test/CodeGen/attr-btf_type_tag-func.c
===================================================================
--- clang/test/CodeGen/attr-btf_type_tag-func.c
+++ clang/test/CodeGen/attr-btf_type_tag-func.c
@@ -15,14 +15,17 @@
int __tag1 * __tag2 *foo(int __tag1 * __tag2 *arg) { return arg; }
-// CHECK: distinct !DISubprogram(name: "foo", scope: ![[#]], file: ![[#]], line: [[#]], type: ![[L9:[0-9]+]]
-// CHECK: ![[L9]] = !DISubroutineType(types: ![[L10:[0-9]+]]
-// CHECK: ![[L10]] = !{![[L11:[0-9]+]], ![[L11]]}
-// CHECK: ![[L11]] = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: ![[L12:[0-9]+]], size: [[#]], annotations: ![[L16:[0-9]+]]
-// CHECK: ![[L12]] = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: ![[L13:[0-9]+]], size: [[#]], annotations: ![[L14:[0-9]+]]
-// CHECK: ![[L13]] = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed
-// CHECK: ![[L14]] = !{![[L15:[0-9]+]]}
-// CHECK: ![[L15]] = !{!"btf_type_tag", !"tag1"}
-// CHECK: ![[L16]] = !{![[L17:[0-9]+]]}
-// CHECK: ![[L17]] = !{!"btf_type_tag", !"tag2"}
-// CHECK: !DILocalVariable(name: "arg", arg: 1, scope: ![[#]], file: ![[#]], line: [[#]], type: ![[L11]])
+// CHECK: distinct !DISubprogram(name: "foo", scope: ![[#]], file: ![[#]], line: [[#]], type: ![[L01:[0-9]+]], {{.*}})
+// CHECK: ![[L01]] = !DISubroutineType(types: ![[L02:[0-9]+]])
+// CHECK: ![[L02]] = !{![[L03:[0-9]+]], ![[L03]]}
+// CHECK: ![[L03]] = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: ![[L04:[0-9]+]], size: [[#]], annotations: ![[L05:[0-9]+]])
+// CHECK: ![[L04]] = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: ![[L06:[0-9]+]], size: [[#]], annotations: ![[L07:[0-9]+]])
+// CHECK: ![[L06]] = !DIBasicType(name: "int", size: [[#]], encoding: DW_ATE_signed, annotations: ![[L08:[0-9]+]])
+// CHECK: ![[L08]] = !{![[L09:[0-9]+]]}
+// CHECK: ![[L09]] = !{!"btf:type_tag", !"tag1"}
+// CHECK: ![[L07]] = !{![[L10:[0-9]+]], ![[L11:[0-9]+]]}
+// CHECK: ![[L10]] = !{!"btf:type_tag", !"tag2"}
+// CHECK: ![[L11]] = !{!"btf_type_tag", !"tag1"}
+// CHECK: ![[L05]] = !{![[L12:[0-9]+]]}
+// CHECK: ![[L12]] = !{!"btf_type_tag", !"tag2"}
+// CHECK: !DILocalVariable(name: "arg", arg: 1, scope: ![[#]], file: ![[#]], line: [[#]], type: ![[L03]])
Index: clang/test/CodeGen/attr-btf_type_tag-func-ptr.c
===================================================================
--- clang/test/CodeGen/attr-btf_type_tag-func-ptr.c
+++ clang/test/CodeGen/attr-btf_type_tag-func-ptr.c
@@ -8,8 +8,10 @@
return arg->a;
}
-// CHECK: !DIDerivedType(tag: DW_TAG_member, name: "f"
-// CHECK-SAME: baseType: ![[L18:[0-9]+]]
-// CHECK: ![[L18]] = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: ![[#]], size: [[#]], annotations: ![[L21:[0-9]+]])
-// CHECK: ![[L21]] = !{![[L22:[0-9]+]]}
-// CHECK: ![[L22]] = !{!"btf_type_tag", !"rcu"}
+// CHECK: !DIDerivedType(tag: DW_TAG_member, name: "f", scope: ![[#]], file: ![[#]], line: [[#]], baseType: ![[L1:[0-9]+]], size: [[#]])
+// CHECK: ![[L1]] = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: ![[L2:[0-9]+]], size: [[#]], annotations: ![[L3:[0-9]+]])
+// CHECK: ![[L2]] = !DISubroutineType(types: ![[#]], annotations: ![[L4:[0-9]+]])
+// CHECK: ![[L4]] = !{![[L5:[0-9]+]]}
+// CHECK: ![[L5]] = !{!"btf:type_tag", !"rcu"}
+// CHECK: ![[L3]] = !{![[L6:[0-9]+]]}
+// CHECK: ![[L6]] = !{!"btf_type_tag", !"rcu"}
Index: clang/test/CodeGen/attr-btf_type_tag-const.c
===================================================================
--- /dev/null
+++ clang/test/CodeGen/attr-btf_type_tag-const.c
@@ -0,0 +1,43 @@
+// RUN: %clang_cc1 \
+// RUN: -triple %itanium_abi_triple -debug-info-kind=limited \
+// RUN: -S -emit-llvm -o - %s | FileCheck %s
+
+// Check that BTF type tags are not attached to DW_TAG_const_type DIEs
+// in presence of "sugar" expressions that are transparent for
+// CGDebugInfo.cpp:UnwrapTypeForDebugInfo(), but are not transparent
+// for local qualifiers.
+//
+// For details see:
+// CGDebugInfo::CreateType(const BTFTagAttributedType, llvm::DIFile)
+
+#define __tag1 __attribute__((btf_type_tag("tag1")))
+#define __tag2 __attribute__((btf_type_tag("tag2")))
+#define __tag3 __attribute__((btf_type_tag("tag3")))
+
+const int *foo;
+typeof(*foo) __tag1 bar;
+
+// CHECK: distinct !DIGlobalVariable(name: "bar", {{.*}}, type: ![[L01:[0-9]+]], {{.*}})
+// CHECK: ![[L01]] = !DIDerivedType(tag: DW_TAG_const_type, baseType: ![[L02:[0-9]+]])
+// CHECK: ![[L02]] = !DIBasicType(name: "int", {{.*}}, annotations: ![[L03:[0-9]+]])
+// CHECK: ![[L03]] = !{![[L04:[0-9]+]]}
+// CHECK: ![[L04]] = !{!"btf:type_tag", !"tag1"}
+
+const int __tag2 *buz;
+
+// CHECK: distinct !DIGlobalVariable(name: "buz", {{.*}}, type: ![[L05:[0-9]+]], {{.*}})
+// CHECK: ![[L05]] = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: ![[L06:[0-9]+]], {{.*}}, annotations: ![[L07:[0-9]+]])
+// CHECK: ![[L06]] = !DIDerivedType(tag: DW_TAG_const_type, baseType: ![[L08:[0-9]+]])
+// CHECK: ![[L08]] = !DIBasicType(name: "int", size: [[#]], {{.*}}, annotations: ![[L09:[0-9]+]])
+// CHECK: ![[L09]] = !{![[L10:[0-9]+]]}
+// CHECK: ![[L10]] = !{!"btf:type_tag", !"tag2"}
+// CHECK: ![[L07]] = !{![[L11:[0-9]+]]}
+// CHECK: ![[L11]] = !{!"btf_type_tag", !"tag2"}
+
+typeof(*buz) __tag3 quux;
+
+// CHECK: distinct !DIGlobalVariable(name: "quux", {{.*}}, type: ![[L12:[0-9]+]], {{.*}})
+// CHECK: ![[L12]] = !DIDerivedType(tag: DW_TAG_const_type, baseType: ![[L13:[0-9]+]])
+// CHECK: ![[L13]] = !DIBasicType(name: "int", {{.*}}, annotations: ![[L14:[0-9]+]])
+// CHECK: ![[L14]] = !{![[L15:[0-9]+]], ![[L10]]}
+// CHECK: ![[L15]] = !{!"btf:type_tag", !"tag3"}
Index: clang/test/CodeGen/attr-btf_type_tag-circular.c
===================================================================
--- /dev/null
+++ clang/test/CodeGen/attr-btf_type_tag-circular.c
@@ -0,0 +1,18 @@
+// RUN: %clang_cc1 -triple %itanium_abi_triple -debug-info-kind=limited -S -emit-llvm -o - %s | FileCheck %s
+
+#define __tag1 __attribute__((btf_type_tag("tag1")))
+
+struct st {
+ struct st __tag1 *self;
+} g;
+
+// CHECK: distinct !DIGlobalVariable(name: "g", scope: ![[#]], file: ![[#]], line: [[#]], type: ![[L1:[0-9]+]], isLocal: false, isDefinition: true)
+// CHECK: ![[L1]] = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "st", file: ![[#]], line: [[#]], size: [[#]], elements: ![[L2:[0-9]+]])
+// CHECK: ![[L2]] = !{![[L3:[0-9]+]]}
+// CHECK: ![[L3]] = !DIDerivedType(tag: DW_TAG_member, name: "self", scope: ![[L1]], file: ![[#]], line: [[#]], baseType: ![[L4:[0-9]+]], size: [[#]])
+// CHECK: ![[L4]] = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: ![[L5:[0-9]+]], size: [[#]], annotations: ![[L6:[0-9]+]])
+// CHECK: ![[L5]] = !DICompositeType(tag: DW_TAG_structure_type, name: "st", file: ![[#]], line: [[#]], size: [[#]], elements: ![[L2]], annotations: ![[L7:[0-9]+]])
+// CHECK: ![[L7]] = !{![[L8:[0-9]+]]}
+// CHECK: ![[L8]] = !{!"btf:type_tag", !"tag1"}
+// CHECK: ![[L6]] = !{![[L9:[0-9]+]]}
+// CHECK: ![[L9]] = !{!"btf_type_tag", !"tag1"}
Index: clang/lib/CodeGen/CGDebugInfo.h
===================================================================
--- clang/lib/CodeGen/CGDebugInfo.h
+++ clang/lib/CodeGen/CGDebugInfo.h
@@ -170,6 +170,8 @@
/// The key is coroutine real parameters, value is DIVariable in LLVM IR.
Param2DILocTy ParamDbgMappings;
+ std::vector<llvm::DIDerivedType *> AnnotationPlaceholders;
+
/// Helper functions for getOrCreateType.
/// @{
/// Currently the checksum of an interface includes the number of
@@ -217,6 +219,7 @@
llvm::DIType *CreateType(const MemberPointerType *Ty, llvm::DIFile *F);
llvm::DIType *CreateType(const AtomicType *Ty, llvm::DIFile *F);
llvm::DIType *CreateType(const PipeType *Ty, llvm::DIFile *F);
+ llvm::DIType *CreateType(const BTFTagAttributedType *Ty, llvm::DIFile *F);
/// Get enumeration type.
llvm::DIType *CreateEnumType(const EnumType *Ty);
llvm::DIType *CreateTypeDefinition(const EnumType *Ty);
Index: clang/lib/CodeGen/CGDebugInfo.cpp
===================================================================
--- clang/lib/CodeGen/CGDebugInfo.cpp
+++ clang/lib/CodeGen/CGDebugInfo.cpp
@@ -1175,6 +1175,129 @@
return RetTy;
}
+static QualType collectBTFTypeTagAnnotations(
+ llvm::LLVMContext &Context, llvm::DIBuilder &DBuilder,
+ llvm::SmallVectorImpl<llvm::Metadata *> &Annots,
+ const BTFTagAttributedType *BTFAttrTy, const char *TagName) {
+ QualType WrappedTy;
+
+ do {
+ StringRef TagValue = BTFAttrTy->getAttr()->getBTFTypeTag();
+ if (!TagValue.empty()) {
+ llvm::Metadata *Ops[] = {
+ llvm::MDString::get(Context, TagName),
+ llvm::MDString::get(Context, TagValue),
+ };
+ Annots.insert(Annots.begin(), llvm::MDNode::get(Context, Ops));
+ }
+ WrappedTy = BTFAttrTy->getWrappedType();
+ BTFAttrTy = dyn_cast<BTFTagAttributedType>(WrappedTy);
+ } while (BTFAttrTy);
+
+ return WrappedTy;
+}
+
+static bool retreiveCVR(llvm::DIDerivedType *DTy, QualifierCollector &Qc) {
+ switch (DTy->getTag()) {
+ case llvm::dwarf::DW_TAG_const_type:
+ Qc.addConst();
+ return true;
+ case llvm::dwarf::DW_TAG_volatile_type:
+ Qc.addVolatile();
+ return true;
+ case llvm::dwarf::DW_TAG_restrict_type:
+ Qc.addRestrict();
+ return true;
+ default:
+ return false;
+ }
+}
+
+// Tags returned by QualifierCollector::getNextQualifier() should be
+// applied in the reverse order, thus use recursive function.
+static llvm::DIType *applyQualifiers(llvm::DIBuilder &DBuilder,
+ llvm::DIType *Ty, QualifierCollector &Qc) {
+ llvm::dwarf::Tag Tag = getNextQualifier(Qc);
+ if (!Tag)
+ return Ty;
+ Ty = applyQualifiers(DBuilder, Ty, Qc);
+ return DBuilder.createQualifiedType(Tag, Ty);
+}
+
+static bool isAnnotationsPlaceholder(llvm::DIDerivedType *DTy) {
+ return DTy->isTemporary() &&
+ DTy->getTag() == llvm::dwarf::DW_TAG_LLVM_annotation;
+}
+
+llvm::DIType *CGDebugInfo::CreateType(const BTFTagAttributedType *Ty,
+ llvm::DIFile *Unit) {
+ SmallVector<llvm::Metadata *, 4> Annotations;
+ auto WrappedTy = collectBTFTypeTagAnnotations(
+ CGM.getLLVMContext(), DBuilder, Annotations, Ty, "btf:type_tag");
+
+ // After discussion with GCC BPF team in [1] it was decided to avoid
+ // attaching BTF type tags to const/volatile/restrict DWARF DIEs.
+ // So, strip qualifiers from WrappedTy and apply those to a final
+ // annotations placeholder instance at the end of this function.
+ //
+ // [1] https://reviews.llvm.org/D143967
+ QualifierCollector Qc;
+ Qc.addCVRQualifiers(WrappedTy.getLocalCVRQualifiers());
+ WrappedTy.removeLocalCVRQualifiers(Qualifiers::CVRMask);
+
+ llvm::DIType *WrappedDI = getOrCreateType(WrappedTy, Unit);
+ if (Annotations.size() == 0)
+ return WrappedDI;
+
+ if (WrappedDI == nullptr)
+ WrappedDI = DBuilder.createUnspecifiedType("void");
+
+ // Stripping local CVR qualifiers might not be enough in cases like this:
+ //
+ // #define __tag __attribute__((btf_type_tag("tag")))
+ // const int *foo;
+ // const int *bar(void) {
+ // return (typeof(*foo) __tag *)(0);
+ // }
+ //
+ // Here the AST looks like:
+ //
+ // BTFTagAttributedType
+ // | 'typeof (*foo) __attribute__((btf_type_tag("tag")))' sugar
+ // `-TypeOfExprType 'typeof (*foo)' sugar
+ // |-ParenExpr 'const int' lvalue
+ // | `- ...
+ // `-QualType 'const int' const
+ // `-BuiltinType 'int'
+ //
+ // The BTFTagAttributedType is applied to TypeOfExpr.
+ // For TypeOfExpr the getOrCreateType(), would return instance of
+ // DIDerivedType with tag DW_TAG_const_type.
+ //
+ // To avoid repeating UnwrapTypeForDebugInfo() logic here just
+ // rebuild CVR metadata nodes if necessary.
+ // The above local CVR qualifiers processing is redundant,
+ // but avoids rebuilding metadata nodes in the most common case.
+ while (auto *DTy = dyn_cast<llvm::DIDerivedType>(WrappedDI)) {
+ if (!retreiveCVR(DTy, Qc))
+ break;
+ WrappedDI = DTy->getBaseType();
+ }
+
+ if (auto *DTy = dyn_cast<llvm::DIDerivedType>(WrappedDI))
+ if (isAnnotationsPlaceholder(DTy)) {
+ WrappedDI = DTy->getBaseType();
+ for (llvm::Metadata *O : DTy->getAnnotations()->operands())
+ Annotations.push_back(O);
+ }
+
+ auto *Placeholder = DBuilder.createAnnotationsPlaceholder(
+ WrappedDI, DBuilder.getOrCreateArray(Annotations));
+ AnnotationPlaceholders.push_back(Placeholder);
+
+ return applyQualifiers(DBuilder, Placeholder, Qc);
+}
+
llvm::DIType *CGDebugInfo::CreatePointerLikeType(llvm::dwarf::Tag Tag,
const Type *Ty,
QualType PointeeTy,
@@ -1187,32 +1310,23 @@
CGM.getTarget().getDWARFAddressSpace(
CGM.getTypes().getTargetAddressSpace(PointeeTy));
- SmallVector<llvm::Metadata *, 4> Annots;
- auto *BTFAttrTy = dyn_cast<BTFTagAttributedType>(PointeeTy);
- while (BTFAttrTy) {
- StringRef Tag = BTFAttrTy->getAttr()->getBTFTypeTag();
- if (!Tag.empty()) {
- llvm::Metadata *Ops[2] = {
- llvm::MDString::get(CGM.getLLVMContext(), StringRef("btf_type_tag")),
- llvm::MDString::get(CGM.getLLVMContext(), Tag)};
- Annots.insert(Annots.begin(),
- llvm::MDNode::get(CGM.getLLVMContext(), Ops));
- }
- BTFAttrTy = dyn_cast<BTFTagAttributedType>(BTFAttrTy->getWrappedType());
- }
-
llvm::DINodeArray Annotations = nullptr;
- if (Annots.size() > 0)
- Annotations = DBuilder.getOrCreateArray(Annots);
+ if (auto *BTFAttrTy =
+ dyn_cast<BTFTagAttributedType>(PointeeTy.getTypePtr())) {
+ SmallVector<llvm::Metadata *, 4> AnnotationsVec;
+ collectBTFTypeTagAnnotations(CGM.getLLVMContext(), DBuilder, AnnotationsVec,
+ BTFAttrTy, "btf_type_tag");
+ Annotations = DBuilder.getOrCreateArray(AnnotationsVec);
+ }
if (Tag == llvm::dwarf::DW_TAG_reference_type ||
Tag == llvm::dwarf::DW_TAG_rvalue_reference_type)
return DBuilder.createReferenceType(Tag, getOrCreateType(PointeeTy, Unit),
Size, Align, DWARFAddressSpace);
- else
- return DBuilder.createPointerType(getOrCreateType(PointeeTy, Unit), Size,
- Align, DWARFAddressSpace, StringRef(),
- Annotations);
+
+ return DBuilder.createPointerType(getOrCreateType(PointeeTy, Unit), Size,
+ Align, DWARFAddressSpace, StringRef(),
+ Annotations);
}
llvm::DIType *CGDebugInfo::getOrCreateStructPtrType(StringRef Name,
@@ -3447,9 +3561,6 @@
case Type::Attributed:
T = cast<AttributedType>(T)->getEquivalentType();
break;
- case Type::BTFTagAttributed:
- T = cast<BTFTagAttributedType>(T)->getWrappedType();
- break;
case Type::Elaborated:
T = cast<ElaboratedType>(T)->getNamedType();
break;
@@ -3641,9 +3752,11 @@
case Type::TemplateSpecialization:
return CreateType(cast<TemplateSpecializationType>(Ty), Unit);
+ case Type::BTFTagAttributed:
+ return CreateType(cast<BTFTagAttributedType>(Ty), Unit);
+
case Type::Auto:
case Type::Attributed:
- case Type::BTFTagAttributed:
case Type::Adjusted:
case Type::Decayed:
case Type::DeducedTemplateSpecialization:
@@ -5781,6 +5894,35 @@
TheCU->setDWOId(Signature);
}
+static llvm::DIType *copyAnnotations(llvm::DIBuilder &DBuilder,
+ llvm::DIDerivedType *Placeholder) {
+ auto *WrappedDI = Placeholder->getBaseType();
+ SmallVector<llvm::Metadata *, 4> Annotations;
+
+ for (const llvm::Metadata *O : Placeholder->getAnnotations()->operands())
+ Annotations.push_back(const_cast<llvm::Metadata *>(O));
+
+ auto AddAnnotations = [&](auto *Type) {
+ if (llvm::DINodeArray OldAnnotations = Type->getAnnotations())
+ for (const llvm::Metadata *O : OldAnnotations->operands())
+ Annotations.push_back(const_cast<llvm::Metadata *>(O));
+ auto Clone = Type->clone();
+ Clone->replaceAnnotations(DBuilder.getOrCreateArray(Annotations));
+ return llvm::MDNode::replaceWithPermanent(std::move(Clone));
+ };
+
+ if (auto *Ty = dyn_cast<llvm::DIBasicType>(WrappedDI))
+ return AddAnnotations(Ty);
+ if (auto *Ty = dyn_cast<llvm::DICompositeType>(WrappedDI))
+ return AddAnnotations(Ty);
+ if (auto *Ty = dyn_cast<llvm::DIDerivedType>(WrappedDI))
+ return AddAnnotations(Ty);
+ if (auto *Ty = dyn_cast<llvm::DISubroutineType>(WrappedDI))
+ return AddAnnotations(Ty);
+
+ return WrappedDI;
+}
+
void CGDebugInfo::finalize() {
// Creating types might create further types - invalidating the current
// element and the size(), so don't cache/reference them.
@@ -5854,6 +5996,10 @@
if (auto MD = TypeCache[RT])
DBuilder.retainType(cast<llvm::DIType>(MD));
+ for (auto &Placeholder : AnnotationPlaceholders)
+ DBuilder.replaceTemporary(llvm::TempDIType(Placeholder),
+ copyAnnotations(DBuilder, Placeholder));
+
DBuilder.finalize();
}
_______________________________________________
cfe-commits mailing list
[email protected]
https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
