1 // Test instrumentation of C++ exception handling constructs.
2
3 // FIXME: Don't seek bb labels, like "if.else"
4 // REQUIRES: asserts
5
6 // RUN: %clangxx %s -o - -emit-llvm -S -fprofile-instr-generate -fexceptions -target %itanium_abi_triple | FileCheck -check-prefix=PGOGEN %s
7 // RUN: %clangxx %s -o - -emit-llvm -S -fprofile-instr-generate -fexceptions -target %itanium_abi_triple | FileCheck -check-prefix=PGOGEN-EXC %s
8
9 // RUN: llvm-profdata merge %S/Inputs/cxx-throws.proftext -o %t.profdata
10 // RUN: %clang %s -o - -emit-llvm -S -fprofile-instr-use=%t.profdata -fcxx-exceptions -target %itanium_abi_triple | FileCheck -check-prefix=PGOUSE %s
11 // RUN: %clang %s -o - -emit-llvm -S -fprofile-instr-use=%t.profdata -fcxx-exceptions -target %itanium_abi_triple | FileCheck -check-prefix=PGOUSE-EXC %s
12
13 // PGOGEN: @[[THC:__profc__Z6throwsv]] = private global [9 x i64] zeroinitializer
14 // PGOGEN-EXC: @[[THC:__profc__Z6throwsv]] = private global [9 x i64] zeroinitializer
15 // PGOGEN: @[[UNC:__profc__Z11unreachablei]] = private global [3 x i64] zeroinitializer
16
17 // PGOGEN-LABEL: @_Z6throwsv()
18 // PGOUSE-LABEL: @_Z6throwsv()
19 // PGOGEN: store {{.*}} @[[THC]], i64 0, i64 0
throws()20 void throws() {
21 // PGOGEN: store {{.*}} @[[THC]], i64 0, i64 1
22 // PGOUSE: br {{.*}} !prof ![[TH1:[0-9]+]]
23 for (int i = 0; i < 100; ++i) {
24 try {
25 // PGOGEN: store {{.*}} @[[THC]], i64 0, i64 3
26 // PGOUSE: br {{.*}} !prof ![[TH2:[0-9]+]]
27 if (i % 3) {
28 // PGOGEN: store {{.*}} @[[THC]], i64 0, i64 4
29 // PGOUSE: br {{.*}} !prof ![[TH3:[0-9]+]]
30 if (i < 50)
31 throw 1;
32 } else {
33 // The catch block may be emitted after the throw above, we can skip it
34 // by looking for an else block, but this will break if anyone puts an
35 // else in the catch
36 // PGOUSE: if.else{{.*}}:
37 // PGOGEN: if.else{{.*}}:
38
39 // PGOGEN: store {{.*}} @[[THC]], i64 0, i64 5
40 // PGOUSE: br {{.*}} !prof ![[TH4:[0-9]+]]
41 if (i >= 50)
42 throw 0;
43 }
44 } catch (int e) {
45 // PGOUSE-EXC: catch{{.*}}:
46 // PGOGEN-EXC: catch{{.*}}:
47
48 // PGOGEN-EXC: store {{.*}} @[[THC]], i64 0, i64 6
49 // PGOGEN-EXC: store {{.*}} @[[THC]], i64 0, i64 7
50 // PGOUSE-EXC: br {{.*}} !prof ![[TH5:[0-9]+]]
51 if (e) {}
52 }
53 // PGOGEN: store {{.*}} @[[THC]], i64 0, i64 2
54
55 // PGOGEN: store {{.*}} @[[THC]], i64 0, i64 8
56 // PGOUSE: br {{.*}} !prof ![[TH6:[0-9]+]]
57 if (i < 100) {}
58 }
59
60 // PGOUSE-NOT: br {{.*}} !prof ![0-9]+
61 // PGOUSE: ret void
62 }
63
64 // PGOGEN-LABEL: @_Z11unreachablei(i32
65 // PGOUSE-LABEL: @_Z11unreachablei(i32
66 // PGOGEN: store {{.*}} @[[UNC]], i64 0, i64 0
unreachable(int i)67 void unreachable(int i) {
68 // PGOGEN: store {{.*}} @[[UNC]], i64 0, i64 1
69 // PGOUSE: br {{.*}} !prof ![[UN1:[0-9]+]]
70 if (i)
71 throw i;
72
73 // PGOGEN: store {{.*}} @[[UNC]], i64 0, i64 2
74 // Since we never reach here, the weights should all be zero (and skipped)
75 // PGOUSE-NOT: br {{.*}} !prof !{{.*}}
76 if (i) {}
77 }
78
79 // PGOUSE-DAG: ![[TH1]] = !{!"branch_weights", i32 101, i32 2}
80 // PGOUSE-DAG: ![[TH2]] = !{!"branch_weights", i32 67, i32 35}
81 // PGOUSE-DAG: ![[TH3]] = !{!"branch_weights", i32 34, i32 34}
82 // PGOUSE-DAG: ![[TH4]] = !{!"branch_weights", i32 18, i32 18}
83 // PGOUSE-EXC: ![[TH5]] = !{!"branch_weights", i32 34, i32 18}
84 // PGOUSE-DAG: ![[TH6]] = !{!"branch_weights", i32 101, i32 1}
85 // PGOUSE-DAG: ![[UN1]] = !{!"branch_weights", i32 2, i32 1}
86
main(int argc,const char * argv[])87 int main(int argc, const char *argv[]) {
88 throws();
89 try {
90 unreachable(1);
91 } catch (int) {}
92 return 0;
93 }
94