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// RUN: %clang_profgen -o %t -O3 %s
// RUN: env LLVM_PROFILE_FILE=%t.profraw %run %t
// RUN: llvm-profdata merge -o %t.profdata %t.profraw
// RUN: %clang_profuse=%t.profdata -o - -S -emit-llvm %s | FileCheck %s
int __llvm_profile_runtime = 0;
void __llvm_profile_initialize_file(void);
int __llvm_profile_write_file(void);
void __llvm_profile_set_filename(const char *);
int foo(int);
int main(int argc, const char *argv[]) {
// CHECK-LABEL: define {{.*}} @main(
// CHECK: br i1 %{{.*}}, label %{{.*}}, label %{{.*}}, !prof ![[PD1:[0-9]+]]
if (argc > 42)
return 1;
// Since the runtime has been suppressed, initialize the file name, as the
// writing will fail below as the file name has not been specified.
__llvm_profile_initialize_file();
// Write out the profile.
__llvm_profile_write_file();
// Change the profile.
return foo(0);
}
int foo(int X) {
// There should be no profiling information for @foo, since it was called
// after the profile was written (and the atexit was suppressed by defining
// profile_runtime).
// CHECK-LABEL: define {{.*}} @foo(
// CHECK: br i1 %{{.*}}, label %{{.*}}, label %{{[^,]+$}}
return X <= 0 ? -X : X;
}
// CHECK: ![[PD1]] = !{!"branch_weights", i32 1, i32 2}
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