rewrite pgo-indirect-call-promotion to rmake

src/tools/compiletest/src/command-list.rs

@@ -202,6 +202,7 @@ const KNOWN_DIRECTIVE_NAMES: &[&str] = &[
     "only-watchos",
     "only-windows",
     "only-windows-gnu",
+    "only-windows-msvc",
     "only-x86",
     "only-x86_64",
     "only-x86_64-fortanix-unknown-sgx",

src/tools/tidy/src/allowed_run_make_makefiles.txt

@@ -35,7 +35,6 @@ run-make/native-link-modifier-whole-archive/Makefile
 run-make/no-alloc-shim/Makefile
 run-make/no-builtins-attribute/Makefile
 run-make/pgo-gen-lto/Makefile
-run-make/pgo-indirect-call-promotion/Makefile
 run-make/print-calling-conventions/Makefile
 run-make/print-target-list/Makefile
 run-make/raw-dylib-alt-calling-convention/Makefile

tests/run-make/pgo-indirect-call-promotion/rmake.rs

@@ -0,0 +1,33 @@
+// 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(rfs::read("interesting.ll")).run();
+}