1// REQUIRES: linux, lld-available
2
3// FIXME: Investigate and fix.
4// XFAIL: powerpc64-target-arch
5// UNSUPPORTED: powerpc64le-target-arch
6
7// RUN: rm -rf %t.profraw
8// 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
9// RUN: %run %t
10// RUN: llvm-profdata merge -o %t.profdata %t.profraw
11// RUN: llvm-profdata show --all-functions %t.profdata | FileCheck %s -check-prefix=PROF
12// RUN: llvm-cov show %t -instr-profile %t.profdata | FileCheck %s -check-prefix=COV
13// RUN: llvm-nm %t | FileCheck %s -check-prefix=NM
14// RUN: llvm-readelf -x __llvm_prf_names %t | FileCheck %s -check-prefix=PRF_NAMES
15// RUN: llvm-size -A %t | FileCheck %s -check-prefix=PRF_CNTS
16
17// RUN: rm -rf %t.lto.profraw
18// 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
19// RUN: %run %t.lto
20// RUN: llvm-profdata merge -o %t.lto.profdata %t.lto.profraw
21// RUN: llvm-profdata show --all-functions %t.lto.profdata | FileCheck %s -check-prefix=PROF
22// RUN: llvm-cov show %t.lto -instr-profile %t.lto.profdata | FileCheck %s -check-prefix=COV
23// RUN: llvm-nm %t.lto | FileCheck %s -check-prefix=NM
24// RUN: llvm-readelf -x __llvm_prf_names %t.lto | FileCheck %s -check-prefix=PRF_NAMES
25// RUN: llvm-size -A %t.lto | FileCheck %s -check-prefix=PRF_CNTS
26
27// Note: We expect foo() and some of the profiling data associated with it to
28// be garbage collected.
29
30// Note: When there is no code in a program, we expect to see the exact same
31// set of external functions provided by the profile runtime.
32
33// Note: We also check the IR instrumentation and expect foo() to be garbage
34// collected as well.
35
36// RUN: rm -rf %t.pgo.profraw
37// RUN: %clang_pgogen=%t.pgo.profraw -fuse-ld=lld -DCODE=1 -ffunction-sections -fdata-sections -Wl,--gc-sections -o %t.pgo %s
38// RUN: %run %t.pgo
39// RUN: llvm-profdata merge -o %t.pgo.profdata %t.pgo.profraw
40// RUN: llvm-profdata show --all-functions %t.pgo.profdata | FileCheck %s -check-prefix=PGO
41// RUN: llvm-nm %t.pgo | FileCheck %s -check-prefix=NM
42
43#ifdef CODE
44
45// COV: [[@LINE+1]]{{ *}}|{{ *}}0|void foo()
46void foo() {}
47
48// COV: [[@LINE+1]]{{ *}}|{{ *}}1|int main
49int main() { return 0; }
50
51#endif // CODE
52
53// NM-NOT: foo
54
55// PROF: Counters:
56// PROF-NEXT: main:
57// PROF-NEXT: Hash:
58// PROF-NEXT: Counters: 1
59// PROF-NEXT: Function count: 1
60// PROF-NEXT: Instrumentation level: Front-end
61// PROF-NEXT: Functions shown: 1
62// PROF-NEXT: Total functions: 1
63// PROF-NEXT: Maximum function count:
64// PROF-NEXT: Maximum internal block count:
65
66// Note: We don't expect the names of garbage collected functions to disappear
67// from __llvm_prf_names, because collectPGOFuncNameStrings() glues the names
68// together.
69
70// PRF_NAMES: Hex dump of section '__llvm_prf_names':
71// PRF_NAMES-NEXT: {{.*}} 0800666f 6f016d61 696e{{.*$}}
72// | | f o o # m a i n
73// | |___________|
74// | |
75// UncompressedLen = 8 |
76// |
77// CompressedLen = 0
78
79// Note: We expect the profile counters for garbage collected functions to also
80// be garbage collected.
81
82// PRF_CNTS: __llvm_prf_cnts 8
83
84// PGO: Counters:
85// PGO-NEXT: main:
86// PGO-NEXT: Hash:
87// PGO-NEXT: Counters: 1
88// PGO-NEXT: Instrumentation level: IR
89// PGO-NEXT: Functions shown: 1
90// PGO-NEXT: Total functions: 1
91// PGO-NEXT: Maximum function count:
92// PGO-NEXT: Maximum internal block count:
93

source code of compiler-rt/test/profile/instrprof-gc-sections.c