1 // REQUIRES: lld-available
2
3 // RUN: %clang_profgen -fcoverage-mapping -c %s -o %t0.o
4 // RUN: %clang_profgen -fcoverage-mapping -c %s -DOBJ_1 -o %t1.o
5 // RUN: %clang_profgen -fcoverage-mapping -c %s -DOBJ_2 -o %t2.o
6
7 /// An external symbol can override a weak external symbol.
8 // RUN: %clang_profgen -fcoverage-mapping -fuse-ld=lld -Wl,-opt:noref %t0.o %t1.o -o %t1
9 // RUN: env LLVM_PROFILE_FILE=%t.profraw %run %t1 | FileCheck %s --check-prefix=CHECK1
10 // RUN: llvm-profdata show %t.profraw --all-functions | FileCheck %s --check-prefix=PROFILE1
11 // RUN: %clang_profgen -fcoverage-mapping -fuse-ld=lld -Wl,-opt:ref %t0.o %t1.o -o %t1
12 // RUN: env LLVM_PROFILE_FILE=%t.profraw %run %t1 | FileCheck %s --check-prefix=CHECK1
13 // RUN: llvm-profdata show %t.profraw --all-functions | FileCheck %s --check-prefix=PROFILE1
14
15 /// link.exe does not support weak overridding weak.
16 // RUN: %clang_profgen -fcoverage-mapping -fuse-ld=lld -Wl,-lldmingw,-opt:ref %t0.o %t2.o -o %t2
17 // RUN: env LLVM_PROFILE_FILE=%t.profraw %run %t2 | FileCheck %s --check-prefix=CHECK2
18 // RUN: llvm-profdata show %t.profraw --all-functions | FileCheck %s --check-prefix=PROFILE2
19
20 /// Repeat the above tests with -ffunction-sections (associative comdat).
21 // RUN: %clang_profgen -fcoverage-mapping -ffunction-sections -c %s -o %t0.o
22 // RUN: %clang_profgen -fcoverage-mapping -ffunction-sections -c %s -DOBJ_1 -o %t1.o
23 // RUN: %clang_profgen -fcoverage-mapping -ffunction-sections -c %s -DOBJ_2 -o %t2.o
24
25 // RUN: %clang_profgen -fcoverage-mapping -fuse-ld=lld -Wl,-opt:noref %t0.o %t1.o -o %t1
26 // RUN: env LLVM_PROFILE_FILE=%t.profraw %run %t1 | FileCheck %s --check-prefix=CHECK1
27 // RUN: llvm-profdata show %t.profraw --all-functions | FileCheck %s --check-prefix=PROFILE1
28 // RUN: %clang_profgen -fcoverage-mapping -fuse-ld=lld -Wl,-opt:ref %t0.o %t1.o -o %t1
29 // RUN: env LLVM_PROFILE_FILE=%t.profraw %run %t1 | FileCheck %s --check-prefix=CHECK1
30 // RUN: llvm-profdata show %t.profraw --all-functions | FileCheck %s --check-prefix=PROFILE1
31
32 // RUN: %clang_profgen -fcoverage-mapping -fuse-ld=lld -Wl,-lldmingw,-opt:ref %t0.o %t2.o -o %t2
33 // RUN: env LLVM_PROFILE_FILE=%t.profraw %run %t2 | FileCheck %s --check-prefix=CHECK2
34 // RUN: llvm-profdata show %t.profraw --all-functions | FileCheck %s --check-prefix=PROFILE2
35
36 // CHECK1: strong
37 // CHECK1: strong
38
39 /// Document the current behavior:
40 /// __profc_?weak@@YAXXZ in %t1.o is local and has a zero value.
41 /// Without GC it takes a duplicate entry.
42 // PROFILE1: ?weak@@YAXXZ:
43 // PROFILE1-NEXT: Hash:
44 // PROFILE1-NEXT: Counters: 1
45 // PROFILE1-NEXT: Function count: 0
46 // PROFILE1: ?weak@@YAXXZ:
47 // PROFILE1-NEXT: Hash:
48 // PROFILE1-NEXT: Counters: 1
49 // PROFILE1-NEXT: Function count: 2
50
51 // CHECK2: weak
52 // CHECK2: weak
53
54 /// __profc__Z4weakv in %t2.o is weak and resolves to the value of %t0.o's copy.
55 /// Without GC it takes a duplicate entry.
56 // PROFILE2: ?weak@@YAXXZ:
57 // PROFILE2-NEXT: Hash:
58 // PROFILE2-NEXT: Counters: 1
59 // PROFILE2-NEXT: Function count: 2
60 // PROFILE2: ?weak@@YAXXZ:
61 // PROFILE2-NEXT: Hash:
62 // PROFILE2-NEXT: Counters: 1
63 // PROFILE2-NEXT: Function count: 2
64
65 #ifdef OBJ_1
66 #include <stdio.h>
67
weak()68 void weak() { puts("strong"); }
foo()69 void foo() { weak(); }
70
71 #elif defined(OBJ_2)
72 #include <stdio.h>
73
weak()74 __attribute__((weak)) void weak() { puts("unreachable"); }
foo()75 void foo() { weak(); }
76
77 #else
78 #include <stdio.h>
79
weak()80 __attribute__((weak)) void weak() { puts("weak"); }
81 void foo();
82
main()83 int main() {
84 foo();
85 weak();
86 }
87 #endif
88