| 1 | // RUN: %clang_profgen -o %t -O3 %s |
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| 2 | // RUN: env LLVM_PROFILE_FILE=%t.profraw %run %t |
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| 3 | // RUN: llvm-profdata merge -o %t.profdata %t.profraw |
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| 4 | // RUN: %clang_profuse=%t.profdata -o - -S -emit-llvm %s | FileCheck %s |
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| 5 | |
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| 6 | int __llvm_profile_runtime = 0; |
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| 7 | void __llvm_profile_initialize_file(void); |
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| 8 | int __llvm_profile_write_file(void); |
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| 9 | void __llvm_profile_set_filename(const char *); |
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| 10 | int foo(int); |
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| 11 | int main(int argc, const char *argv[]) { |
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| 12 | // CHECK-LABEL: define {{.*}} @main( |
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| 13 | // CHECK: br i1 %{{.*}}, label %{{.*}}, label %{{.*}}, !prof ![[PD1:[0-9]+]] |
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| 14 | if (argc > 42) |
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| 15 | return 1; |
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| 16 | |
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| 17 | // Since the runtime has been suppressed, initialize the file name, as the |
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| 18 | // writing will fail below as the file name has not been specified. |
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| 19 | __llvm_profile_initialize_file(); |
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| 20 | |
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| 21 | // Write out the profile. |
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| 22 | __llvm_profile_write_file(); |
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| 23 | |
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| 24 | // Change the profile. |
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| 25 | return foo(0); |
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| 26 | } |
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| 27 | int foo(int X) { |
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| 28 | // There should be no profiling information for @foo, since it was called |
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| 29 | // after the profile was written (and the atexit was suppressed by defining |
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| 30 | // profile_runtime). |
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| 31 | // CHECK-LABEL: define {{.*}} @foo( |
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| 32 | // CHECK: br i1 %{{.*}}, label %{{.*}}, label %{{[^,]+$}} |
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| 33 | return X <= 0 ? -X : X; |
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| 34 | } |
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| 35 | // CHECK: ![[PD1]] = !{!"branch_weights", i32 1, i32 2} |
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| 36 | |
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