compiler-rt/test/profile/instrprof-merging.cpp

   1 // 1) Compile shared code into different object files and into an executable.
   2
   3 // RUN: %clangxx_profgen -std=c++14 -fcoverage-mapping %s -c -o %t.v1.o \
   4 // RUN:                  -D_VERSION_1
   5 // RUN: %clangxx_profgen -std=c++14 -fcoverage-mapping %s -c -o %t.v2.o \
   6 // RUN:                  -D_VERSION_2
   7 // RUN: %clangxx_profgen -std=c++14 -fcoverage-mapping %t.v1.o %t.v2.o \
   8 // RUN:                  -o %t.exe
   9
  10 // 2) Collect profile data.
  11
  12 // RUN: env LLVM_PROFILE_FILE=%t.profraw %run %t.exe
  13 // RUN: llvm-profdata merge %t.profraw -o %t.profdata
  14
  15 // 3) Generate coverage reports from the different object files and the exe.
  16
  17 // RUN: llvm-cov show %t.v1.o -instr-profile=%t.profdata | FileCheck %s -check-prefixes=V1,V1-ONLY
  18 // RUN: llvm-cov show %t.v2.o -instr-profile=%t.profdata | FileCheck %s -check-prefixes=V2,V2-ONLY
  19 // RUN: llvm-cov show %t.v1.o -object %t.v2.o -instr-profile=%t.profdata | FileCheck %s -check-prefixes=V1,V2
  20 // RUN: llvm-cov show %t.exe -instr-profile=%t.profdata | FileCheck %s -check-prefixes=V1,V2
  21
  22 // 4) Verify that coverage reporting on the aggregate coverage mapping shows
  23 //    hits for all code. (We used to arbitrarily pick a mapping from one binary
  24 //    and prefer it over others.) When only limited coverage information is
  25 //    available (just from one binary), don't try to guess any region counts.
  26
  27 struct A {
  28   A() {}    // V1: [[@LINE]]{{ *}}|{{ *}}1
  29             // V1-ONLY: [[@LINE+1]]{{ *}}|{{ *}}|
  30   A(int) {} // V2-ONLY: [[@LINE-2]]{{ *}}|{{ *}}|
  31             // V2: [[@LINE-1]]{{ *}}|{{ *}}1
  32 };
  33
  34 #ifdef _VERSION_1
  35
  36 void foo();
  37
  38 void bar() {
  39   A x;      // V1: [[@LINE]]{{ *}}|{{ *}}1
  40 }
  41
  42 int main() {
  43   foo();    // V1: [[@LINE]]{{ *}}|{{ *}}1
  44   bar();
  45   return 0;
  46 }
  47
  48 #endif // _VERSION_1
  49
  50 #ifdef _VERSION_2
  51
  52 void foo() {
  53   A x{0};   // V2: [[@LINE]]{{ *}}|{{ *}}1
  54 }
  55
  56 #endif // _VERSION_2