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