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35 lines
1.3 KiB
35 lines
1.3 KiB
4 months ago
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// RUN: %clang_profgen -o %t -O3 %s
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// RUN: env LLVM_PROFILE_FILE=%t1.profraw %run %t %t2.profraw
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// RUN: llvm-profdata merge -o %t1.profdata %t1.profraw
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// RUN: %clang_profuse=%t1.profdata -o - -S -emit-llvm %s | FileCheck %s --check-prefix=CHECK1 --check-prefix=CHECK
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// RUN: llvm-profdata merge -o %t2.profdata %t2.profraw
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// RUN: %clang_profuse=%t2.profdata -o - -S -emit-llvm %s | FileCheck %s --check-prefix=CHECK2 --check-prefix=CHECK
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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 < 2)
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return 1;
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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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int Ret = foo(0);
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// It'll write out again at exit; change the filename so we get two files.
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__llvm_profile_set_filename(argv[1]);
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return Ret;
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}
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int foo(int X) {
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// CHECK-LABEL: define {{.*}} @foo(
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// CHECK1: br i1 %{{.*}}, label %{{.*}}, label %{{[^,]+$}}
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// CHECK2: br i1 %{{.*}}, label %{{.*}}, label %{{.*}}, !prof ![[PD2:[0-9]+]]
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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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// CHECK2: ![[PD2]] = !{!"branch_weights", i32 2, i32 1}
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