clang/test/Profile/cxx-lambda.cpp

   1 // Tests for instrumentation of C++11 lambdas
   2
   3 // RUN: %clang_cc1 -x c++ %s -triple %itanium_abi_triple -main-file-name cxx-lambda.cpp -std=c++11 -o - -emit-llvm -fprofile-instrument=clang > %tgen
   4 // RUN: FileCheck -allow-deprecated-dag-overlap  --input-file=%tgen -check-prefix=PGOGEN %s
   5 // RUN: FileCheck -allow-deprecated-dag-overlap  --input-file=%tgen -check-prefix=LMBGEN %s
   6
   7 // RUN: llvm-profdata merge %S/Inputs/cxx-lambda.proftext -o %t.profdata
   8 // RUN: %clang_cc1 -x c++ %s -triple %itanium_abi_triple -main-file-name cxx-lambda.cpp -std=c++11 -o - -emit-llvm -fprofile-instrument-use-path=%t.profdata > %tuse
   9 // RUN: FileCheck -allow-deprecated-dag-overlap  --input-file=%tuse -check-prefix=PGOUSE %s
  10 // RUN: FileCheck -allow-deprecated-dag-overlap  --input-file=%tuse -check-prefix=LMBUSE %s
  11
  12 // PGOGEN: @[[LWC:__profc__Z7lambdasv]] = {{(private|internal)}} global [4 x i64] zeroinitializer
  13 // PGOGEN: @[[MAC:__profc_main]] = {{(private|internal)}} global [1 x i64] zeroinitializer
  14 // LMBGEN: @[[LFC:"__profc_cxx_lambda.cpp__ZZ7lambdasvENK3\$_0clEi"]] = {{(private|internal)}} global [4 x i64] zeroinitializer
  15
  16 // PGOGEN-LABEL: define {{.*}}void @_Z7lambdasv()
  17 // PGOUSE-LABEL: define {{.*}}void @_Z7lambdasv()
  18 // PGOGEN: store {{.*}} @[[LWC]]
  19 void lambdas() {
  20   int i = 1;
  21
  22   // LMBGEN-LABEL: define internal{{( [0-9_a-z]*cc)?( noundef)?( zeroext)?}} i1 @"_ZZ7lambdasvENK3$_0clEi"(
  23   // LMBUSE-LABEL: define internal{{( [0-9_a-z]*cc)?( noundef)?( zeroext)?}} i1 @"_ZZ7lambdasvENK3$_0clEi"(
  24   // LMBGEN: store {{.*}} @[[LFC]]
  25   auto f = [&i](int k) {
  26     // LMBGEN: store {{.*}} @[[LFC]], i32 0, i32 1
  27     // LMBUSE: br {{.*}} !prof ![[LF1:[0-9]+]]
  28     if (i > 0) {
  29     }
  30     // LMBGEN: store {{.*}} @[[LFC]], i32 0, i32 2
  31     // LMBUSE: br {{.*}} !prof ![[LF2:[0-9]+]]
  32     return k && i;
  33   };
  34
  35   // PGOGEN: store {{.*}} @[[LWC]], i32 0, i32 1
  36   // PGOUSE: br {{.*}} !prof ![[LW1:[0-9]+]]
  37   if (i) {}
  38
  39   // PGOGEN: store {{.*}} @[[LWC]], i32 0, i32 2
  40   // PGOUSE: br {{.*}} !prof ![[LW2:[0-9]+]]
  41   for (i = 0; i < 10; ++i)
  42     f(9 - i);
  43
  44   // PGOGEN: store {{.*}} @[[LWC]], i32 0, i32 3
  45   // PGOUSE: br {{.*}} !prof ![[LW3:[0-9]+]]
  46   if (i) {}
  47 }
  48
  49 // PGOUSE-DAG: ![[LW1]] = !{!"branch_weights", i32 2, i32 1}
  50 // PGOUSE-DAG: ![[LW2]] = !{!"branch_weights", i32 11, i32 2}
  51 // PGOUSE-DAG: ![[LW3]] = !{!"branch_weights", i32 2, i32 1}
  52
  53 // LMBUSE-DAG: ![[LF1]] = !{!"branch_weights", i32 10, i32 2}
  54 // LMBUSE-DAG: ![[LF2]] = !{!"branch_weights", i32 10, i32 2}
  55
  56 int main(int argc, const char *argv[]) {
  57   lambdas();
  58   return 0;
  59 }