mirrors/llvm-project
0
0
Fork 0
mirror of https://github.com/llvm/llvm-project.git synced 2025-04-25 23:26:04 +00:00
Code Issues Projects Releases Wiki Activity
llvm-project/clang/test/AST/ast-dump-attr-json.cpp
Fangrui Song 0665669876 [Sema] Mark alias/ifunc targets used and consider mangled names 
https://reviews.llvm.org/D54188 marked "alias" targets as used in C to
fix -Wunused false positives. This patch extends the approach to handle
mangled names to support global scope names in C++ and the
`overloadable` attribute in C.

(Note: we should skip `UsingShadowDecl`, which would trigger an
assertion failure in `ItaniumMangleContextImpl::mangleCXXName`.
See regression test added by commit 1c2afbae9af22b58190c10e3517242d01d89d612.)

In addition, we mark ifunc targets as used to fix #63957 (temporarily
used by xz; ifunc was removed by
689ae24273)

While our approach has false negatives for namespace scope names, the
majority of alias/ifunc C++ uses (global scope with no overloads) are
handled.

Note: The following function with internal linkage but C language
linkage type is mangled in Clang but not in GCC. This inconsistency
makes alias/ifunc difficult to use in C++ with portability (#88593).
```
extern "C" {
static void f0() {}
// GCC: void g0() __attribute__((alias("_ZL2f0v")));
// Clang: void g0() __attribute__((alias("f0")));
}
```

Pull Request: https://github.com/llvm/llvm-project/pull/87130
2024-04-16 11:49:25 -07:00

532 lines
14 KiB
C++
Raw Blame History

// RUN: %clang_cc1 -triple x86_64-pc-linux -Wdocumentation -ast-dump=json %s | FileCheck %s
int global_decl;
extern __attribute__((alias("global_decl"))) int global_alias;
void cleanup_function(int*);
void some() {
__attribute__((cleanup(cleanup_function))) int var;
}
__attribute__((deprecated)) int deprecated_var0;
__attribute__((deprecated("reason"))) int deprecated_var1;
__attribute__((deprecated("reason", "replacement"))) int deprecated_var2;
__attribute__((unavailable)) int unavailable_var0;
__attribute__((unavailable("reason"))) int unavailable_var1;
__attribute__ ((section ("SECTION_NAME"))) int section_var;
__attribute__ ((visibility ("hidden"))) int visibility_var;
__thread __attribute__ ((tls_model ("local-exec"))) int tls_model_var;
// NOTE: CHECK lines have been autogenerated by gen_ast_dump_json_test.py
// using --filters=VarDecl
// CHECK-NOT: {{^}}Dumping
// CHECK: "kind": "VarDecl",
// CHECK-NEXT: "loc": {
// CHECK-NEXT: "offset": 97,
// CHECK-NEXT: "file": "{{.*}}",
// CHECK-NEXT: "line": 3,
// CHECK-NEXT: "col": 5,
// CHECK-NEXT: "tokLen": 11
// CHECK-NEXT: },
// CHECK-NEXT: "range": {
// CHECK-NEXT: "begin": {
// CHECK-NEXT: "offset": 93,
// CHECK-NEXT: "col": 1,
// CHECK-NEXT: "tokLen": 3
// CHECK-NEXT: },
// CHECK-NEXT: "end": {
// CHECK-NEXT: "offset": 97,
// CHECK-NEXT: "col": 5,
// CHECK-NEXT: "tokLen": 11
// CHECK-NEXT: }
// CHECK-NEXT: },
// CHECK-NEXT: "isUsed": true,
// CHECK-NEXT: "name": "global_decl",
// CHECK-NEXT: "mangledName": "global_decl",
// CHECK-NEXT: "type": {
// CHECK-NEXT: "qualType": "int"
// CHECK-NEXT: }
// CHECK-NEXT: }
// CHECK-NOT: {{^}}Dumping
// CHECK: "kind": "VarDecl",
// CHECK-NEXT: "loc": {
// CHECK-NEXT: "offset": 159,
// CHECK-NEXT: "line": 4,
// CHECK-NEXT: "col": 50,
// CHECK-NEXT: "tokLen": 12
// CHECK-NEXT: },
// CHECK-NEXT: "range": {
// CHECK-NEXT: "begin": {
// CHECK-NEXT: "offset": 110,
// CHECK-NEXT: "col": 1,
// CHECK-NEXT: "tokLen": 6
// CHECK-NEXT: },
// CHECK-NEXT: "end": {
// CHECK-NEXT: "offset": 159,
// CHECK-NEXT: "col": 50,
// CHECK-NEXT: "tokLen": 12
// CHECK-NEXT: }
// CHECK-NEXT: },
// CHECK-NEXT: "name": "global_alias",
// CHECK-NEXT: "mangledName": "global_alias",
// CHECK-NEXT: "type": {
// CHECK-NEXT: "qualType": "int"
// CHECK-NEXT: },
// CHECK-NEXT: "storageClass": "extern",
// CHECK-NEXT: "inner": [
// CHECK-NEXT: {
// CHECK-NEXT: "id": "0x{{.*}}",
// CHECK-NEXT: "kind": "AliasAttr",
// CHECK-NEXT: "range": {
// CHECK-NEXT: "begin": {
// CHECK-NEXT: "offset": 132,
// CHECK-NEXT: "col": 23,
// CHECK-NEXT: "tokLen": 5
// CHECK-NEXT: },
// CHECK-NEXT: "end": {
// CHECK-NEXT: "offset": 151,
// CHECK-NEXT: "col": 42,
// CHECK-NEXT: "tokLen": 1
// CHECK-NEXT: }
// CHECK-NEXT: },
// CHECK-NEXT: "aliasee": "global_decl"
// CHECK-NEXT: }
// CHECK-NEXT: ]
// CHECK-NEXT: }
// CHECK-NOT: {{^}}Dumping
// CHECK: "kind": "VarDecl",
// CHECK-NEXT: "loc": {
// CHECK-NEXT: "offset": 266,
// CHECK-NEXT: "col": 50,
// CHECK-NEXT: "tokLen": 3
// CHECK-NEXT: },
// CHECK-NEXT: "range": {
// CHECK-NEXT: "begin": {
// CHECK-NEXT: "offset": 219,
// CHECK-NEXT: "col": 3,
// CHECK-NEXT: "tokLen": 13
// CHECK-NEXT: },
// CHECK-NEXT: "end": {
// CHECK-NEXT: "offset": 266,
// CHECK-NEXT: "col": 50,
// CHECK-NEXT: "tokLen": 3
// CHECK-NEXT: }
// CHECK-NEXT: },
// CHECK-NEXT: "name": "var",
// CHECK-NEXT: "type": {
// CHECK-NEXT: "qualType": "int"
// CHECK-NEXT: },
// CHECK-NEXT: "inner": [
// CHECK-NEXT: {
// CHECK-NEXT: "id": "0x{{.*}}",
// CHECK-NEXT: "kind": "CleanupAttr",
// CHECK-NEXT: "range": {
// CHECK-NEXT: "begin": {
// CHECK-NEXT: "offset": 234,
// CHECK-NEXT: "col": 18,
// CHECK-NEXT: "tokLen": 7
// CHECK-NEXT: },
// CHECK-NEXT: "end": {
// CHECK-NEXT: "offset": 258,
// CHECK-NEXT: "col": 42,
// CHECK-NEXT: "tokLen": 1
// CHECK-NEXT: }
// CHECK-NEXT: },
// CHECK-NEXT: "cleanup_function": {
// CHECK-NEXT: "id": "0x{{.*}}",
// CHECK-NEXT: "kind": "FunctionDecl",
// CHECK-NEXT: "name": "cleanup_function",
// CHECK-NEXT: "type": {
// CHECK-NEXT: "qualType": "void (int *)"
// CHECK-NEXT: }
// CHECK-NEXT: }
// CHECK-NEXT: }
// CHECK-NEXT: ]
// CHECK-NEXT: }
// CHECK-NOT: {{^}}Dumping
// CHECK: "kind": "VarDecl",
// CHECK-NEXT: "loc": {
// CHECK-NEXT: "offset": 306,
// CHECK-NEXT: "line": 11,
// CHECK-NEXT: "col": 33,
// CHECK-NEXT: "tokLen": 15
// CHECK-NEXT: },
// CHECK-NEXT: "range": {
// CHECK-NEXT: "begin": {
// CHECK-NEXT: "offset": 274,
// CHECK-NEXT: "col": 1,
// CHECK-NEXT: "tokLen": 13
// CHECK-NEXT: },
// CHECK-NEXT: "end": {
// CHECK-NEXT: "offset": 306,
// CHECK-NEXT: "col": 33,
// CHECK-NEXT: "tokLen": 15
// CHECK-NEXT: }
// CHECK-NEXT: },
// CHECK-NEXT: "name": "deprecated_var0",
// CHECK-NEXT: "mangledName": "deprecated_var0",
// CHECK-NEXT: "type": {
// CHECK-NEXT: "qualType": "int"
// CHECK-NEXT: },
// CHECK-NEXT: "inner": [
// CHECK-NEXT: {
// CHECK-NEXT: "id": "0x{{.*}}",
// CHECK-NEXT: "kind": "DeprecatedAttr",
// CHECK-NEXT: "range": {
// CHECK-NEXT: "begin": {
// CHECK-NEXT: "offset": 289,
// CHECK-NEXT: "col": 16,
// CHECK-NEXT: "tokLen": 10
// CHECK-NEXT: },
// CHECK-NEXT: "end": {
// CHECK-NEXT: "offset": 289,
// CHECK-NEXT: "col": 16,
// CHECK-NEXT: "tokLen": 10
// CHECK-NEXT: }
// CHECK-NEXT: }
// CHECK-NEXT: }
// CHECK-NEXT: ]
// CHECK-NEXT: }
// CHECK-NOT: {{^}}Dumping
// CHECK: "kind": "VarDecl",
// CHECK-NEXT: "loc": {
// CHECK-NEXT: "offset": 365,
// CHECK-NEXT: "line": 12,
// CHECK-NEXT: "col": 43,
// CHECK-NEXT: "tokLen": 15
// CHECK-NEXT: },
// CHECK-NEXT: "range": {
// CHECK-NEXT: "begin": {
// CHECK-NEXT: "offset": 323,
// CHECK-NEXT: "col": 1,
// CHECK-NEXT: "tokLen": 13
// CHECK-NEXT: },
// CHECK-NEXT: "end": {
// CHECK-NEXT: "offset": 365,
// CHECK-NEXT: "col": 43,
// CHECK-NEXT: "tokLen": 15
// CHECK-NEXT: }
// CHECK-NEXT: },
// CHECK-NEXT: "name": "deprecated_var1",
// CHECK-NEXT: "mangledName": "deprecated_var1",
// CHECK-NEXT: "type": {
// CHECK-NEXT: "qualType": "int"
// CHECK-NEXT: },
// CHECK-NEXT: "inner": [
// CHECK-NEXT: {
// CHECK-NEXT: "id": "0x{{.*}}",
// CHECK-NEXT: "kind": "DeprecatedAttr",
// CHECK-NEXT: "range": {
// CHECK-NEXT: "begin": {
// CHECK-NEXT: "offset": 338,
// CHECK-NEXT: "col": 16,
// CHECK-NEXT: "tokLen": 10
// CHECK-NEXT: },
// CHECK-NEXT: "end": {
// CHECK-NEXT: "offset": 357,
// CHECK-NEXT: "col": 35,
// CHECK-NEXT: "tokLen": 1
// CHECK-NEXT: }
// CHECK-NEXT: },
// CHECK-NEXT: "message": "reason"
// CHECK-NEXT: }
// CHECK-NEXT: ]
// CHECK-NEXT: }
// CHECK-NOT: {{^}}Dumping
// CHECK: "kind": "VarDecl",
// CHECK-NEXT: "loc": {
// CHECK-NEXT: "offset": 439,
// CHECK-NEXT: "line": 13,
// CHECK-NEXT: "col": 58,
// CHECK-NEXT: "tokLen": 15
// CHECK-NEXT: },
// CHECK-NEXT: "range": {
// CHECK-NEXT: "begin": {
// CHECK-NEXT: "offset": 382,
// CHECK-NEXT: "col": 1,
// CHECK-NEXT: "tokLen": 13
// CHECK-NEXT: },
// CHECK-NEXT: "end": {
// CHECK-NEXT: "offset": 439,
// CHECK-NEXT: "col": 58,
// CHECK-NEXT: "tokLen": 15
// CHECK-NEXT: }
// CHECK-NEXT: },
// CHECK-NEXT: "name": "deprecated_var2",
// CHECK-NEXT: "mangledName": "deprecated_var2",
// CHECK-NEXT: "type": {
// CHECK-NEXT: "qualType": "int"
// CHECK-NEXT: },
// CHECK-NEXT: "inner": [
// CHECK-NEXT: {
// CHECK-NEXT: "id": "0x{{.*}}",
// CHECK-NEXT: "kind": "DeprecatedAttr",
// CHECK-NEXT: "range": {
// CHECK-NEXT: "begin": {
// CHECK-NEXT: "offset": 397,
// CHECK-NEXT: "col": 16,
// CHECK-NEXT: "tokLen": 10
// CHECK-NEXT: },
// CHECK-NEXT: "end": {
// CHECK-NEXT: "offset": 431,
// CHECK-NEXT: "col": 50,
// CHECK-NEXT: "tokLen": 1
// CHECK-NEXT: }
// CHECK-NEXT: },
// CHECK-NEXT: "message": "reason",
// CHECK-NEXT: "replacement": "replacement"
// CHECK-NEXT: }
// CHECK-NEXT: ]
// CHECK-NEXT: }
// CHECK-NOT: {{^}}Dumping
// CHECK: "kind": "VarDecl",
// CHECK-NEXT: "loc": {
// CHECK-NEXT: "offset": 490,
// CHECK-NEXT: "line": 15,
// CHECK-NEXT: "col": 34,
// CHECK-NEXT: "tokLen": 16
// CHECK-NEXT: },
// CHECK-NEXT: "range": {
// CHECK-NEXT: "begin": {
// CHECK-NEXT: "offset": 457,
// CHECK-NEXT: "col": 1,
// CHECK-NEXT: "tokLen": 13
// CHECK-NEXT: },
// CHECK-NEXT: "end": {
// CHECK-NEXT: "offset": 490,
// CHECK-NEXT: "col": 34,
// CHECK-NEXT: "tokLen": 16
// CHECK-NEXT: }
// CHECK-NEXT: },
// CHECK-NEXT: "name": "unavailable_var0",
// CHECK-NEXT: "mangledName": "unavailable_var0",
// CHECK-NEXT: "type": {
// CHECK-NEXT: "qualType": "int"
// CHECK-NEXT: },
// CHECK-NEXT: "inner": [
// CHECK-NEXT: {
// CHECK-NEXT: "id": "0x{{.*}}",
// CHECK-NEXT: "kind": "UnavailableAttr",
// CHECK-NEXT: "range": {
// CHECK-NEXT: "begin": {
// CHECK-NEXT: "offset": 472,
// CHECK-NEXT: "col": 16,
// CHECK-NEXT: "tokLen": 11
// CHECK-NEXT: },
// CHECK-NEXT: "end": {
// CHECK-NEXT: "offset": 472,
// CHECK-NEXT: "col": 16,
// CHECK-NEXT: "tokLen": 11
// CHECK-NEXT: }
// CHECK-NEXT: }
// CHECK-NEXT: }
// CHECK-NEXT: ]
// CHECK-NEXT: }
// CHECK-NOT: {{^}}Dumping
// CHECK: "kind": "VarDecl",
// CHECK-NEXT: "loc": {
// CHECK-NEXT: "offset": 551,
// CHECK-NEXT: "line": 16,
// CHECK-NEXT: "col": 44,
// CHECK-NEXT: "tokLen": 16
// CHECK-NEXT: },
// CHECK-NEXT: "range": {
// CHECK-NEXT: "begin": {
// CHECK-NEXT: "offset": 508,
// CHECK-NEXT: "col": 1,
// CHECK-NEXT: "tokLen": 13
// CHECK-NEXT: },
// CHECK-NEXT: "end": {
// CHECK-NEXT: "offset": 551,
// CHECK-NEXT: "col": 44,
// CHECK-NEXT: "tokLen": 16
// CHECK-NEXT: }
// CHECK-NEXT: },
// CHECK-NEXT: "name": "unavailable_var1",
// CHECK-NEXT: "mangledName": "unavailable_var1",
// CHECK-NEXT: "type": {
// CHECK-NEXT: "qualType": "int"
// CHECK-NEXT: },
// CHECK-NEXT: "inner": [
// CHECK-NEXT: {
// CHECK-NEXT: "id": "0x{{.*}}",
// CHECK-NEXT: "kind": "UnavailableAttr",
// CHECK-NEXT: "range": {
// CHECK-NEXT: "begin": {
// CHECK-NEXT: "offset": 523,
// CHECK-NEXT: "col": 16,
// CHECK-NEXT: "tokLen": 11
// CHECK-NEXT: },
// CHECK-NEXT: "end": {
// CHECK-NEXT: "offset": 543,
// CHECK-NEXT: "col": 36,
// CHECK-NEXT: "tokLen": 1
// CHECK-NEXT: }
// CHECK-NEXT: },
// CHECK-NEXT: "message": "reason"
// CHECK-NEXT: }
// CHECK-NEXT: ]
// CHECK-NEXT: }
// CHECK-NOT: {{^}}Dumping
// CHECK: "kind": "VarDecl",
// CHECK-NEXT: "loc": {
// CHECK-NEXT: "offset": 617,
// CHECK-NEXT: "line": 18,
// CHECK-NEXT: "col": 48,
// CHECK-NEXT: "tokLen": 11
// CHECK-NEXT: },
// CHECK-NEXT: "range": {
// CHECK-NEXT: "begin": {
// CHECK-NEXT: "offset": 570,
// CHECK-NEXT: "col": 1,
// CHECK-NEXT: "tokLen": 13
// CHECK-NEXT: },
// CHECK-NEXT: "end": {
// CHECK-NEXT: "offset": 617,
// CHECK-NEXT: "col": 48,
// CHECK-NEXT: "tokLen": 11
// CHECK-NEXT: }
// CHECK-NEXT: },
// CHECK-NEXT: "name": "section_var",
// CHECK-NEXT: "mangledName": "section_var",
// CHECK-NEXT: "type": {
// CHECK-NEXT: "qualType": "int"
// CHECK-NEXT: },
// CHECK-NEXT: "inner": [
// CHECK-NEXT: {
// CHECK-NEXT: "id": "0x{{.*}}",
// CHECK-NEXT: "kind": "SectionAttr",
// CHECK-NEXT: "range": {
// CHECK-NEXT: "begin": {
// CHECK-NEXT: "offset": 586,
// CHECK-NEXT: "col": 17,
// CHECK-NEXT: "tokLen": 7
// CHECK-NEXT: },
// CHECK-NEXT: "end": {
// CHECK-NEXT: "offset": 609,
// CHECK-NEXT: "col": 40,
// CHECK-NEXT: "tokLen": 1
// CHECK-NEXT: }
// CHECK-NEXT: },
// CHECK-NEXT: "section_name": "SECTION_NAME"
// CHECK-NEXT: }
// CHECK-NEXT: ]
// CHECK-NEXT: }
// CHECK-NOT: {{^}}Dumping
// CHECK: "kind": "VarDecl",
// CHECK-NEXT: "loc": {
// CHECK-NEXT: "offset": 675,
// CHECK-NEXT: "line": 20,
// CHECK-NEXT: "col": 45,
// CHECK-NEXT: "tokLen": 14
// CHECK-NEXT: },
// CHECK-NEXT: "range": {
// CHECK-NEXT: "begin": {
// CHECK-NEXT: "offset": 631,
// CHECK-NEXT: "col": 1,
// CHECK-NEXT: "tokLen": 13
// CHECK-NEXT: },
// CHECK-NEXT: "end": {
// CHECK-NEXT: "offset": 675,
// CHECK-NEXT: "col": 45,
// CHECK-NEXT: "tokLen": 14
// CHECK-NEXT: }
// CHECK-NEXT: },
// CHECK-NEXT: "name": "visibility_var",
// CHECK-NEXT: "mangledName": "visibility_var",
// CHECK-NEXT: "type": {
// CHECK-NEXT: "qualType": "int"
// CHECK-NEXT: },
// CHECK-NEXT: "inner": [
// CHECK-NEXT: {
// CHECK-NEXT: "id": "0x{{.*}}",
// CHECK-NEXT: "kind": "VisibilityAttr",
// CHECK-NEXT: "range": {
// CHECK-NEXT: "begin": {
// CHECK-NEXT: "offset": 647,
// CHECK-NEXT: "col": 17,
// CHECK-NEXT: "tokLen": 10
// CHECK-NEXT: },
// CHECK-NEXT: "end": {
// CHECK-NEXT: "offset": 667,
// CHECK-NEXT: "col": 37,
// CHECK-NEXT: "tokLen": 1
// CHECK-NEXT: }
// CHECK-NEXT: },
// CHECK-NEXT: "visibility": "hidden"
// CHECK-NEXT: }
// CHECK-NEXT: ]
// CHECK-NEXT: }
// CHECK-NOT: {{^}}Dumping
// CHECK: "kind": "VarDecl",
// CHECK-NEXT: "loc": {
// CHECK-NEXT: "offset": 748,
// CHECK-NEXT: "line": 22,
// CHECK-NEXT: "col": 57,
// CHECK-NEXT: "tokLen": 13
// CHECK-NEXT: },
// CHECK-NEXT: "range": {
// CHECK-NEXT: "begin": {
// CHECK-NEXT: "offset": 692,
// CHECK-NEXT: "col": 1,
// CHECK-NEXT: "tokLen": 8
// CHECK-NEXT: },
// CHECK-NEXT: "end": {
// CHECK-NEXT: "offset": 748,
// CHECK-NEXT: "col": 57,
// CHECK-NEXT: "tokLen": 13
// CHECK-NEXT: }
// CHECK-NEXT: },
// CHECK-NEXT: "name": "tls_model_var",
// CHECK-NEXT: "mangledName": "tls_model_var",
// CHECK-NEXT: "type": {
// CHECK-NEXT: "qualType": "int"
// CHECK-NEXT: },
// CHECK-NEXT: "tls": "static",
// CHECK-NEXT: "inner": [
// CHECK-NEXT: {
// CHECK-NEXT: "id": "0x{{.*}}",
// CHECK-NEXT: "kind": "TLSModelAttr",
// CHECK-NEXT: "range": {
// CHECK-NEXT: "begin": {
// CHECK-NEXT: "offset": 717,
// CHECK-NEXT: "col": 26,
// CHECK-NEXT: "tokLen": 9
// CHECK-NEXT: },
// CHECK-NEXT: "end": {
// CHECK-NEXT: "offset": 740,
// CHECK-NEXT: "col": 49,
// CHECK-NEXT: "tokLen": 1
// CHECK-NEXT: }
// CHECK-NEXT: },
// CHECK-NEXT: "tls_model": "local-exec"
// CHECK-NEXT: }
// CHECK-NEXT: ]
// CHECK-NEXT: }
Reference in New Issue View Git Blame Copy Permalink