1// REQUIRES: lld-available
2
3// REQUIRES: target={{.*windows-msvc.*}}
4// RUN: %clang_profgen -fcoverage-mapping -c %s -o %t0.o
5// RUN: %clang_profgen -fcoverage-mapping -c %s -DOBJ_1 -o %t1.o
6// RUN: %clang_profgen -fcoverage-mapping -c %s -DOBJ_2 -o %t2.o
7
8/// An external symbol can override a weak external symbol.
9// RUN: %clang_profgen -fcoverage-mapping -fuse-ld=lld -Wl,-opt:noref %t0.o %t1.o -o %t1
10// RUN: env LLVM_PROFILE_FILE=%t.profraw %run %t1 | FileCheck %s --check-prefix=CHECK1
11// RUN: llvm-profdata show %t.profraw --all-functions | FileCheck %s --check-prefix=PROFILE1
12// RUN: %clang_profgen -fcoverage-mapping -fuse-ld=lld -Wl,-opt:ref %t0.o %t1.o -o %t1
13// RUN: env LLVM_PROFILE_FILE=%t.profraw %run %t1 | FileCheck %s --check-prefix=CHECK1
14// RUN: llvm-profdata show %t.profraw --all-functions | FileCheck %s --check-prefix=PROFILE1
15
16/// link.exe does not support weak overridding weak.
17// RUN: %clang_profgen -fcoverage-mapping -fuse-ld=lld -Wl,-lld-allow-duplicate-weak,-opt:ref %t0.o %t2.o -o %t2
18// RUN: env LLVM_PROFILE_FILE=%t.profraw %run %t2 | FileCheck %s --check-prefix=CHECK2
19// RUN: llvm-profdata show %t.profraw --all-functions | FileCheck %s --check-prefix=PROFILE2
20
21/// Repeat the above tests with -ffunction-sections (associative comdat).
22// RUN: %clang_profgen -fcoverage-mapping -ffunction-sections -c %s -o %t0.o
23// RUN: %clang_profgen -fcoverage-mapping -ffunction-sections -c %s -DOBJ_1 -o %t1.o
24// RUN: %clang_profgen -fcoverage-mapping -ffunction-sections -c %s -DOBJ_2 -o %t2.o
25
26// RUN: %clang_profgen -fcoverage-mapping -fuse-ld=lld -Wl,-opt:noref %t0.o %t1.o -o %t1
27// RUN: env LLVM_PROFILE_FILE=%t.profraw %run %t1 | FileCheck %s --check-prefix=CHECK1
28// RUN: llvm-profdata show %t.profraw --all-functions | FileCheck %s --check-prefix=PROFILE1
29// RUN: %clang_profgen -fcoverage-mapping -fuse-ld=lld -Wl,-opt:ref %t0.o %t1.o -o %t1
30// RUN: env LLVM_PROFILE_FILE=%t.profraw %run %t1 | FileCheck %s --check-prefix=CHECK1
31// RUN: llvm-profdata show %t.profraw --all-functions | FileCheck %s --check-prefix=PROFILE1
32
33// RUN: %clang_profgen -fcoverage-mapping -fuse-ld=lld -Wl,-lld-allow-duplicate-weak,-opt:ref %t0.o %t2.o -o %t2
34// RUN: env LLVM_PROFILE_FILE=%t.profraw %run %t2 | FileCheck %s --check-prefix=CHECK2
35// RUN: llvm-profdata show %t.profraw --all-functions | FileCheck %s --check-prefix=PROFILE2
36
37// CHECK1: strong
38// CHECK1: strong
39
40/// Document the current behavior:
41/// __profc_?weak@@YAXXZ in %t1.o is local and has a zero value.
42/// Without GC it takes a duplicate entry.
43// PROFILE1: ?weak@@YAXXZ:
44// PROFILE1-NEXT: Hash:
45// PROFILE1-NEXT: Counters: 1
46// PROFILE1-NEXT: Function count: 0
47// PROFILE1: ?weak@@YAXXZ:
48// PROFILE1-NEXT: Hash:
49// PROFILE1-NEXT: Counters: 1
50// PROFILE1-NEXT: Function count: 2
51
52// CHECK2: weak
53// CHECK2: weak
54
55/// __profc__Z4weakv in %t2.o is weak and resolves to the value of %t0.o's copy.
56/// Without GC it takes a duplicate entry.
57// PROFILE2: ?weak@@YAXXZ:
58// PROFILE2-NEXT: Hash:
59// PROFILE2-NEXT: Counters: 1
60// PROFILE2-NEXT: Function count: 2
61// PROFILE2: ?weak@@YAXXZ:
62// PROFILE2-NEXT: Hash:
63// PROFILE2-NEXT: Counters: 1
64// PROFILE2-NEXT: Function count: 2
65
66#ifdef OBJ_1
67#include <stdio.h>
68
69void weak() { puts("strong"); }
70void foo() { weak(); }
71
72#elif defined(OBJ_2)
73#include <stdio.h>
74
75__attribute__((weak)) void weak() { puts("unreachable"); }
76void foo() { weak(); }
77
78#else
79#include <stdio.h>
80
81__attribute__((weak)) void weak() { puts(s: "weak"); }
82void foo();
83
84int main() {
85 foo();
86 weak();
87}
88#endif
89

source code of compiler-rt/test/profile/Windows/coverage-weak-lld.cpp