xref: /llvm-project/clang/test/ClangScanDeps/optimize-system-warnings.m (revision 68eb3b202f30a1c3f2575f44b9d16365258e66b6) 
1// This test verifies that system module variants are mergable despite having
2// different warning flags, as most warnings are disabled in system modules.
3// This checks for system modules marked as such both via `-isystem` and
4// `[system]`.
5
6// RUN: rm -rf %t
7// RUN: split-file %s %t
8// RUN: sed -e "s|DIR|%/t|g" %t/build/compile-commands.json.in > %t/build/compile-commands.json
9// RUN: clang-scan-deps -compilation-database %t/build/compile-commands.json \
10// RUN:   -j 1 -format experimental-full -optimize-args=system-warnings > %t/deps.db
11// RUN: cat %t/deps.db | sed 's:\\\\\?:/:g' | FileCheck %s -DPREFIX=%/t
12
13// CHECK:      {
14// CHECK-NEXT:   "modules": [
15// CHECK-NEXT:     {
16// CHECK-NEXT:       "clang-module-deps": [],
17// CHECK-NEXT:       "clang-modulemap-file":
18// CHECK-NEXT:       "command-line": [
19// CHECK-NOT:          "-W
20// CHECK:            ],
21// CHECK-NEXT:       "context-hash": "{{.*}}",
22// CHECK-NEXT:       "file-deps": [
23// CHECK:            ],
24// CHECK-NEXT:       "link-libraries": [],
25// CHECK-NEXT:       "name": "A"
26// CHECK-NEXT:     },
27// CHECK-NEXT:     {
28// CHECK-NEXT:       "clang-module-deps": [],
29// CHECK-NEXT:       "clang-modulemap-file":
30// CHECK-NEXT:       "command-line": [
31// CHECK-NOT:          "-W
32// CHECK:            ],
33// CHECK-NEXT:       "context-hash": "{{.*}}",
34// CHECK-NEXT:       "file-deps": [
35// CHECK:            ],
36// CHECK-NEXT:       "link-libraries": [],
37// CHECK-NEXT:       "name": "B"
38// CHECK-NEXT:     },
39// CHECK-NEXT:     {
40// CHECK-NEXT:       "clang-module-deps": [],
41// CHECK-NEXT:       "clang-modulemap-file":
42// CHECK-NEXT:       "command-line": [
43// CHECK:              "-Wmaybe-unused
44// CHECK:            ],
45// CHECK-NEXT:       "context-hash": "{{.*}}",
46// CHECK-NEXT:       "file-deps": [
47// CHECK:            ],
48// CHECK-NEXT:       "link-libraries": [],
49// CHECK-NEXT:       "name": "C"
50// CHECK-NEXT:     }
51// CHECK-NEXT:   ],
52// CHECK-NEXT:   "translation-units": [
53// CHECK:        ]
54// CHECK:      }
55
56// A.m and B.m verify that system modules with different warning flags get
57// merged. C.m verifies that -Wsystem-headers disables the optimization.
58//--- build/compile-commands.json.in
59
60[
61{
62  "directory": "DIR",
63  "command": "clang -c DIR/A.m -isystem modules/A -I modules/B -fmodules -fmodules-cache-path=DIR/module-cache -fimplicit-module-maps",
64  "file": "DIR/A.m"
65},
66{
67  "directory": "DIR",
68  "command": "clang -c DIR/B.m -isystem modules/A -I modules/B -fmodules -fmodules-cache-path=DIR/module-cache -fimplicit-module-maps -Wmaybe-unused",
69  "file": "DIR/B.m"
70},
71{
72  "directory": "DIR",
73  "command": "clang -c DIR/C.m -isystem modules/C              -fmodules -fmodules-cache-path=DIR/module-cache -fimplicit-module-maps -Wmaybe-unused -Wsystem-headers",
74  "file": "DIR/C.m"
75}
76]
77
78//--- modules/A/module.modulemap
79
80module A {
81  umbrella header "A.h"
82}
83
84//--- modules/A/A.h
85
86typedef int A_t;
87
88//--- modules/B/module.modulemap
89
90module B [system] {
91  umbrella header "B.h"
92}
93
94//--- modules/B/B.h
95
96typedef int B_t;
97
98//--- modules/C/module.modulemap
99
100module C [system] {
101  umbrella header "C.h"
102}
103
104//--- modules/C/C.h
105
106typedef int C_t;
107
108//--- A.m
109
110#include <A.h>
111#include <B.h>
112
113A_t a = 0;
114
115//--- B.m
116
117#include <A.h>
118#include <B.h>
119
120A_t b = 0;
121
122//--- C.m
123
124#include <C.h>
125
126C_t c = 0;
127