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 %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_NOGC
11 // RUN: %clang_profgen -fcoverage-mapping -fuse-ld=lld -Wl,--gc-sections %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_NOGC
14 
15 // RUN: %clang_profgen -fcoverage-mapping -fuse-ld=lld %t0.o %t2.o -o %t2
16 // RUN: env LLVM_PROFILE_FILE=%t.profraw %run %t2 | FileCheck %s --check-prefix=CHECK2
17 // RUN: llvm-profdata show %t.profraw --all-functions | FileCheck %s --check-prefix=PROFILE2_NOGC
18 // RUN: %clang_profgen -fcoverage-mapping -fuse-ld=lld -Wl,--gc-sections %t0.o %t2.o -o %t2
19 // RUN: env LLVM_PROFILE_FILE=%t.profraw %run %t2 | FileCheck %s --check-prefix=CHECK2
20 // RUN: llvm-profdata show %t.profraw --all-functions | FileCheck %s --check-prefix=PROFILE2_GC
21 
22 /// Repeat the above tests with -ffunction-sections.
23 // RUN: %clang_profgen -fcoverage-mapping -ffunction-sections -c %s -o %t0.o
24 // RUN: %clang_profgen -fcoverage-mapping -ffunction-sections -c %s -DOBJ_1 -o %t1.o
25 // RUN: %clang_profgen -fcoverage-mapping -ffunction-sections -c %s -DOBJ_2 -o %t2.o
26 
27 // RUN: %clang_profgen -fcoverage-mapping -fuse-ld=lld %t0.o %t1.o -o %t1
28 // RUN: env LLVM_PROFILE_FILE=%t.profraw %run %t1 | FileCheck %s --check-prefix=CHECK1
29 // RUN: llvm-profdata show %t.profraw --all-functions | FileCheck %s --check-prefix=PROFILE1_NOGC
30 // RUN: %clang_profgen -fcoverage-mapping -fuse-ld=lld -Wl,--gc-sections %t0.o %t1.o -o %t1
31 // RUN: env LLVM_PROFILE_FILE=%t.profraw %run %t1 | FileCheck %s --check-prefix=CHECK1
32 // RUN: llvm-profdata show %t.profraw --all-functions | FileCheck %s --check-prefix=PROFILE1_GC
33 
34 // RUN: %clang_profgen -fcoverage-mapping -fuse-ld=lld %t0.o %t2.o -o %t2
35 // RUN: env LLVM_PROFILE_FILE=%t.profraw %run %t2 | FileCheck %s --check-prefix=CHECK2
36 // RUN: llvm-profdata show %t.profraw --all-functions | FileCheck %s --check-prefix=PROFILE2_NOGC
37 // RUN: %clang_profgen -fcoverage-mapping -fuse-ld=lld -Wl,--gc-sections %t0.o %t2.o -o %t2
38 // RUN: env LLVM_PROFILE_FILE=%t.profraw %run %t2 | FileCheck %s --check-prefix=CHECK2
39 // RUN: llvm-profdata show %t.profraw --all-functions | FileCheck %s --check-prefix=PROFILE2_GC
40 
41 // CHECK1: strong
42 // CHECK1: strong
43 
44 /// __profc__Z4weakv in %t1.o is local and has a zero value.
45 /// Without GC it takes a duplicate entry.
46 // PROFILE1_NOGC:      _Z4weakv:
47 // PROFILE1_NOGC-NEXT:    Hash:
48 // PROFILE1_NOGC-NEXT:    Counters: 1
49 // PROFILE1_NOGC-NEXT:    Function count: 0
50 // PROFILE1_NOGC:      _Z4weakv:
51 // PROFILE1_NOGC-NEXT:    Hash:
52 // PROFILE1_NOGC-NEXT:    Counters: 1
53 // PROFILE1_NOGC-NEXT:    Function count: 2
54 
55 // PROFILE1_GC:      _Z4weakv:
56 // PROFILE1_GC-NEXT:    Hash:
57 // PROFILE1_GC-NEXT:    Counters: 1
58 // PROFILE1_GC-NEXT:    Function count: 2
59 // PROFILE1_GC-NOT:  _Z4weakv:
60 
61 // CHECK2: weak
62 // CHECK2: weak
63 
64 /// __profc__Z4weakv in %t2.o is weak and resolves to the value of %t0.o's copy.
65 /// Without GC it takes a duplicate entry.
66 // PROFILE2_NOGC:      _Z4weakv:
67 // PROFILE2_NOGC-NEXT:    Hash:
68 // PROFILE2_NOGC-NEXT:    Counters: 1
69 // PROFILE2_NOGC-NEXT:    Function count: 2
70 // PROFILE2_NOGC:      _Z4weakv:
71 // PROFILE2_NOGC-NEXT:    Hash:
72 // PROFILE2_NOGC-NEXT:    Counters: 1
73 // PROFILE2_NOGC-NEXT:    Function count: 2
74 
75 // PROFILE2_GC:      _Z4weakv:
76 // PROFILE2_GC-NEXT:    Hash:
77 // PROFILE2_GC-NEXT:    Counters: 1
78 // PROFILE2_GC-NEXT:    Function count: 2
79 // PROFILE2_GC-NOT:  _Z4weakv:
80 
81 #ifdef OBJ_1
82 #include <stdio.h>
83 
84 void weak() { puts("strong"); }
85 void foo() { weak(); }
86 
87 #elif defined(OBJ_2)
88 #include <stdio.h>
89 
90 __attribute__((weak)) void weak() { puts("unreachable"); }
91 void foo() { weak(); }
92 
93 #else
94 #include <stdio.h>
95 
96 __attribute__((weak)) void weak() { puts("weak"); }
97 void foo();
98 
99 int main() {
100   foo();
101   weak();
102 }
103 #endif
104