mirror of https://github.com/rust-lang/rust
37 lines
1.5 KiB
Rust
37 lines
1.5 KiB
Rust
// 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-support
|
|
// 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();
|
|
}
|