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// This test checks that indirect call promotion is performed. The test
// programs calls the same function a thousand times through a function pointer.
// Only PGO data provides the information that it actually always is the same
// function. We verify that the indirect call promotion pass inserts a check
// whether it can make a direct call instead of the indirect call.
// See https://github.com/rust-lang/rust/pull/66631
//@ needs-profiler-runtime
// Reason: llvm_profdata is used
//@ ignore-cross-compile
// Reason: the compiled binary is executed
use run_make_support::{llvm_filecheck, llvm_profdata, rfs, run, rustc};
fn main() {
// We don't compile `opaque` with either optimizations or instrumentation.
rustc().input("opaque.rs").run();
// Compile the test program with instrumentation
rfs::create_dir("prof_data_dir");
rustc().input("interesting.rs").profile_generate("prof_data_dir").opt().codegen_units(1).run();
rustc().input("main.rs").profile_generate("prof_data_dir").opt().run();
// The argument below generates to the expected branch weights
run("main");
llvm_profdata().merge().output("prof_data_dir/merged.profdata").input("prof_data_dir").run();
rustc()
.input("interesting.rs")
.profile_use("prof_data_dir/merged.profdata")
.opt()
.codegen_units(1)
.emit("llvm-ir")
.run();
llvm_filecheck()
.patterns("filecheck-patterns.txt")
.stdin_buf(rfs::read("interesting.ll"))
.run();
}
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