1// REQUIRES: linux, lld-available
2
3// RUN: %clang_profgen=%t.profraw -fuse-ld=lld -fcoverage-mapping -mllvm -enable-name-compression=false -DCODE=1 -ffunction-sections -fdata-sections -Wl,--gc-sections -o %t %s
4// RUN: %run %t
5// RUN: llvm-profdata merge -o %t.profdata %t.profraw
6// RUN: llvm-profdata show --all-functions %t.profdata | FileCheck %s -check-prefix=PROF
7// RUN: llvm-cov show %t -instr-profile %t.profdata | FileCheck %s -check-prefix=COV
8// RUN: llvm-nm %t | FileCheck %s -check-prefix=NM
9// RUN: llvm-readelf -x __llvm_prf_names %t | FileCheck %s -check-prefix=PRF_NAMES
10// RUN: llvm-size -A %t | FileCheck %s -check-prefix=PRF_CNTS
11
12// RUN: %clang_lto_profgen=%t.lto.profraw -fuse-ld=lld -fcoverage-mapping -mllvm -enable-name-compression=false -DCODE=1 -ffunction-sections -fdata-sections -Wl,--gc-sections -flto -o %t.lto %s
13// RUN: %run %t.lto
14// RUN: llvm-profdata merge -o %t.lto.profdata %t.lto.profraw
15// RUN: llvm-profdata show --all-functions %t.lto.profdata | FileCheck %s -check-prefix=PROF
16// RUN: llvm-cov show %t.lto -instr-profile %t.lto.profdata | FileCheck %s -check-prefix=COV
17// RUN: llvm-nm %t.lto | FileCheck %s -check-prefix=NM
18// RUN: llvm-readelf -x __llvm_prf_names %t.lto | FileCheck %s -check-prefix=PRF_NAMES
19// RUN: llvm-size -A %t.lto | FileCheck %s -check-prefix=PRF_CNTS
20
21// Note: We expect foo() and some of the profiling data associated with it to
22// be garbage collected.
23
24// Note: When there is no code in a program, we expect to see the exact same
25// set of external functions provided by the profile runtime.
26
27// Note: We also check the IR instrumentation and expect foo() to be garbage
28// collected as well.
29
30// RUN: %clang_pgogen=%t.pgo.profraw -fuse-ld=lld -DCODE=1 -ffunction-sections -fdata-sections -Wl,--gc-sections -o %t.pgo %s
31// RUN: %run %t.pgo
32// RUN: llvm-profdata merge -o %t.pgo.profdata %t.pgo.profraw
33// RUN: llvm-profdata show --all-functions %t.pgo.profdata | FileCheck %s -check-prefix=PGO
34// RUN: llvm-nm %t.pgo | FileCheck %s -check-prefix=NM
35
36#ifdef CODE
37
38// COV: [[@LINE+1]]{{ *}}|{{ *}}0|void foo()
39void foo() {}
40
41// COV: [[@LINE+1]]{{ *}}|{{ *}}1|int main
42int main() { return 0; }
43
44#endif // CODE
45
46// NM-NOT: foo
47
48// PROF: Counters:
49// PROF-NEXT: main:
50// PROF-NEXT: Hash:
51// PROF-NEXT: Counters: 1
52// PROF-NEXT: Function count: 1
53// PROF-NEXT: Instrumentation level: Front-end
54// PROF-NEXT: Functions shown: 1
55// PROF-NEXT: Total functions: 1
56// PROF-NEXT: Maximum function count:
57// PROF-NEXT: Maximum internal block count:
58
59// Note: We don't expect the names of garbage collected functions to disappear
60// from __llvm_prf_names, because collectPGOFuncNameStrings() glues the names
61// together.
62
63// PRF_NAMES: Hex dump of section '__llvm_prf_names':
64// PRF_NAMES-NEXT: {{.*}} 0800666f 6f016d61 696e{{.*$}}
65// | | f o o # m a i n
66// | |___________|
67// | |
68// UncompressedLen = 8 |
69// |
70// CompressedLen = 0
71
72// Note: We expect the profile counters for garbage collected functions to also
73// be garbage collected.
74
75// PRF_CNTS: __llvm_prf_cnts 8
76
77// PGO: Counters:
78// PGO-NEXT: main:
79// PGO-NEXT: Hash:
80// PGO-NEXT: Counters: 1
81// PGO-NEXT: Instrumentation level: IR
82// PGO-NEXT: Functions shown: 1
83// PGO-NEXT: Total functions: 1
84// PGO-NEXT: Maximum function count:
85// PGO-NEXT: Maximum internal block count:
86