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

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