clang/test/Profile/gcc-flag-compatibility.c

   1 // Tests for -fprofile-generate and -fprofile-use flag compatibility. These two
   2 // flags behave similarly to their GCC counterparts:
   3 //
   4 // -fprofile-generate         Generates the profile file ./default.profraw
   5 // -fprofile-generate=<dir>   Generates the profile file <dir>/default.profraw
   6 // -fprofile-use              Uses the profile file ./default.profdata
   7 // -fprofile-use=<dir>        Uses the profile file <dir>/default.profdata
   8 // -fprofile-use=<dir>/file   Uses the profile file <dir>/file
   9
  10 // On AIX, -flto used to be required with -fprofile-generate. gcc-flag-compatibility-aix.c is used to do the testing on AIX with -flto
  11 // RUN: %clang %s -c -S -o - -emit-llvm -fprofile-generate | FileCheck -check-prefix=PROFILE-GEN %s
  12 // PROFILE-GEN: @__profc_main = {{(private|internal)}} global [2 x i64] zeroinitializer, section
  13 // PROFILE-GEN: @__profd_main =
  14
  15 // Check that -fprofile-generate=/path/to generates /path/to/default.profraw
  16 // RxUN: %clang %s -c -S -o - -emit-llvm -fprofile-generate=/path/to | FileCheck -check-prefixes=PROFILE-GEN,PROFILE-GEN-EQ %s
  17 // PROFILE-GEN-EQ: constant [{{.*}} x i8] c"/path/to{{/|\\\\}}{{.*}}\00"
  18
  19 // Check that -fprofile-use=some/path reads some/path/default.profdata
  20 // This uses Clang FE format profile.
  21 // RUN: rm -rf %t.dir
  22 // RUN: mkdir -p %t.dir/some/path
  23 // RUN: llvm-profdata merge %S/Inputs/gcc-flag-compatibility.proftext -o %t.dir/some/path/default.profdata
  24 // RUN: %clang %s -o - -Xclang -disable-llvm-passes -emit-llvm -S -fprofile-use=%t.dir/some/path | FileCheck -check-prefix=PROFILE-USE %s
  25
  26 // Check that -fprofile-use=some/path/file.prof reads some/path/file.prof
  27 // This uses Clang FE format profile.
  28 // RUN: rm -rf %t.dir
  29 // RUN: mkdir -p %t.dir/some/path
  30 // RUN: llvm-profdata merge %S/Inputs/gcc-flag-compatibility.proftext -o %t.dir/some/path/file.prof
  31 // RUN: %clang %s -o - -Xclang -disable-llvm-passes -emit-llvm -S -fprofile-use=%t.dir/some/path/file.prof | FileCheck -check-prefix=PROFILE-USE %s
  32 // PROFILE-USE: = !{!"branch_weights", i32 101, i32 2}
  33
  34 // Check that -fprofile-use=some/path reads some/path/default.profdata
  35 // This uses LLVM IR format profile.
  36 // RUN: rm -rf %t.dir
  37 // RUN: mkdir -p %t.dir/some/path
  38 // RUN: llvm-profdata merge %S/Inputs/gcc-flag-compatibility_IR.proftext -o %t.dir/some/path/default.profdata
  39 // RUN: %clang %s -o - -emit-llvm -S -fprofile-use=%t.dir/some/path | FileCheck -check-prefix=PROFILE-USE-IR %s
  40
  41 // Check that -fprofile-use=some/path/file.prof reads some/path/file.prof
  42 // This uses LLVM IR format profile.
  43 // RUN: rm -rf %t.dir
  44 // RUN: mkdir -p %t.dir/some/path
  45 // RUN: llvm-profdata merge %S/Inputs/gcc-flag-compatibility_IR.proftext -o %t.dir/some/path/file.prof
  46 // RUN: %clang %s -o - -emit-llvm -S -fprofile-use=%t.dir/some/path/file.prof | FileCheck -check-prefix=PROFILE-USE-IR %s
  47 //
  48 // RUN: llvm-profdata merge %S/Inputs/gcc-flag-compatibility_IR_entry.proftext -o %t.dir/some/path/file.prof
  49 // RUN: %clang %s -o - -emit-llvm -S -fprofile-use=%t.dir/some/path/file.prof | FileCheck -check-prefix=PROFILE-USE-IR %s
  50
  51 // PROFILE-USE-IR: = !{!"branch_weights", i32 100, i32 1}
  52
  53 int X = 0;
  54
  55 int main(void) {
  56   int i;
  57   for (i = 0; i < 100; i++)
  58     X += i;
  59   return 0;
  60 }