blob: d731e1a675a0ff3cb3926fd06bcdafca45766728 [file] [log] [blame]
Justin Bogner81c22c22014-01-23 02:54:27 +00001// Test that instrumentation based profiling feeds branch prediction
2// correctly. This tests both generation of profile data and use of the same,
3// and the input file for the -fprofile-instr-use case is expected to be result
4// of running the program generated by the -fprofile-instr-generate case
5// (excepting no_usable_data). As such, main() should call every function in
6// this test.
7
8// RUN: %clang %s -o - -emit-llvm -S -fprofile-instr-generate -fno-exceptions -target %itanium_abi_triple > %tgen
9// RUN: FileCheck --input-file=%tgen -check-prefix=CTRGEN %s
10// RUN: FileCheck --input-file=%tgen -check-prefix=DTRGEN %s
11// RUN: FileCheck --input-file=%tgen -check-prefix=MTHGEN %s
12// RUN: FileCheck --input-file=%tgen -check-prefix=WRPGEN %s
13
14// RUN: %clang %s -o - -emit-llvm -S -fprofile-instr-use=%S/Inputs/instr-profile-class.pgodata -fno-exceptions -target %itanium_abi_triple > %tuse
15// RUN: FileCheck --input-file=%tuse -check-prefix=CTRUSE %s
16// RUN: FileCheck --input-file=%tuse -check-prefix=DTRUSE %s
17// RUN: FileCheck --input-file=%tuse -check-prefix=MTHUSE %s
18// RUN: FileCheck --input-file=%tuse -check-prefix=WRPUSE %s
19
20class Simple {
21 int Member;
22public:
23 // CTRGEN-LABEL: define {{.*}} @_ZN6SimpleC2Ei(
24 // CTRUSE-LABEL: define {{.*}} @_ZN6SimpleC2Ei(
25 // CTRGEN: store {{.*}} @[[SCC:__llvm_pgo_ctr[0-9]*]], i64 0, i64 0
26 explicit Simple(int Member) : Member(Member) {
27 // CTRGEN: store {{.*}} @[[SCC]], i64 0, i64 1
28 // CTRUSE: br {{.*}} !prof ![[SC1:[0-9]+]]
29 if (Member) {}
30 // CTRGEN-NOT: store {{.*}} @[[SCC]],
31 // CTRUSE-NOT: br {{.*}} !prof ![0-9]+
32 // CTRUSE: ret void
33 }
34 // CTRUSE: ![[SC1]] = metadata !{metadata !"branch_weights", i32 100, i32 2}
35
36 // DTRGEN-LABEL: define {{.*}} @_ZN6SimpleD2Ev(
37 // DTRUSE-LABEL: define {{.*}} @_ZN6SimpleD2Ev(
38 // DTRGEN: store {{.*}} @[[SDC:__llvm_pgo_ctr[0-9]*]], i64 0, i64 0
39 ~Simple() {
40 // DTRGEN: store {{.*}} @[[SDC]], i64 0, i64 1
41 // DTRUSE: br {{.*}} !prof ![[SD1:[0-9]+]]
42 if (Member) {}
43 // DTRGEN-NOT: store {{.*}} @[[SDC]],
44 // DTRUSE-NOT: br {{.*}} !prof ![0-9]+
45 // DTRUSE: ret void
46 }
47 // DTRUSE: ![[SD1]] = metadata !{metadata !"branch_weights", i32 100, i32 2}
48
49 // MTHGEN-LABEL: define {{.*}} @_ZN6Simple6methodEv(
50 // MTHUSE-LABEL: define {{.*}} @_ZN6Simple6methodEv(
51 // MTHGEN: store {{.*}} @[[SMC:__llvm_pgo_ctr[0-9]*]], i64 0, i64 0
52 void method() {
53 // MTHGEN: store {{.*}} @[[SMC]], i64 0, i64 1
54 // MTHUSE: br {{.*}} !prof ![[SM1:[0-9]+]]
55 if (Member) {}
56 // MTHGEN-NOT: store {{.*}} @[[SMC]],
57 // MTHUSE-NOT: br {{.*}} !prof ![0-9]+
58 // MTHUSE: ret void
59 }
60 // MTHUSE: ![[SM1]] = metadata !{metadata !"branch_weights", i32 100, i32 2}
61};
62
63// WRPGEN-LABEL: define {{.*}} @_Z14simple_wrapperv(
64// WRPUSE-LABEL: define {{.*}} @_Z14simple_wrapperv(
65// WRPGEN: store {{.*}} @[[SWC:__llvm_pgo_ctr[0-9]*]], i64 0, i64 0
66void simple_wrapper() {
67 // WRPGEN: store {{.*}} @[[SWC]], i64 0, i64 1
68 // WRPUSE: br {{.*}} !prof ![[SW1:[0-9]+]]
69 for (int I = 0; I < 100; ++I) {
70 Simple S(I);
71 S.method();
72 }
73 // WRPGEN-NOT: store {{.*}} @[[SWC]],
74 // WRPUSE-NOT: br {{.*}} !prof ![0-9]+
75 // WRPUSE: ret void
76}
77// WRPUSE: ![[SW1]] = metadata !{metadata !"branch_weights", i32 100, i32 2}
78
79int main(int argc, const char *argv[]) {
80 simple_wrapper();
81 return 0;
82}