run cross-lang-lto-pgo-smoketest in CI by renaming it

src/tools/run-make-support/src/command.rs

@@ -258,13 +258,6 @@ pub fn assert_stderr_not_contains_regex<S: AsRef<str>>(&self, unexpected: S) ->
         self
     }
 
-    /// Checks that `stderr` does not contain the regex pattern `unexpected`.
-    #[track_caller]
-    pub fn assert_stderr_not_contains_regex<S: AsRef<str>>(&self, unexpected: S) -> &Self {
-        assert_not_contains_regex(&self.stdout_utf8(), unexpected);
-        self
-    }
-
     #[track_caller]
     pub fn assert_exit_code(&self, code: i32) -> &Self {
         assert!(self.output.status.code() == Some(code));

src/tools/run-make-support/src/external_deps/llvm.rs

@@ -246,6 +246,12 @@ pub fn input<P: AsRef<Path>>(&mut self, path: P) -> &mut Self {
         self.cmd.arg(path.as_ref());
         self
     }
+
+    /// Disassemble all executable sections found in the input files.
+    pub fn disassemble(&mut self) -> &mut Self {
+        self.cmd.arg("-d");
+        self
+    }
 }
 
 impl LlvmAr {

tests/run-make/cross-lang-lto-clang/_Makefile

@@ -1,29 +0,0 @@
-# FIXME(Oneirical): This is already implemented as an rmake.rs file, but due to #126180,
-# the rmake.rs is not ran on CI. Once the rmake test has been proven to work, remove this
-# Makefile.
-
-# needs-force-clang-based-tests
-
-# This test makes sure that cross-language inlining actually works by checking
-# the generated machine code.
-
-include ../tools.mk
-
-all: cpp-executable rust-executable
-
-cpp-executable:
-	$(RUSTC) -Clinker-plugin-lto=on -o $(TMPDIR)/librustlib-xlto.a -Copt-level=2 -Ccodegen-units=1 ./rustlib.rs
-	$(CLANG) -flto=thin -fuse-ld=lld -L $(TMPDIR) -lrustlib-xlto -o $(TMPDIR)/cmain ./cmain.c -O3
-	# Make sure we don't find a call instruction to the function we expect to
-	# always be inlined.
-	"$(LLVM_BIN_DIR)"/llvm-objdump -d $(TMPDIR)/cmain | $(CGREP) -v -e "call.*rust_always_inlined"
-	# As a sanity check, make sure we do find a call instruction to a
-	# non-inlined function
-	"$(LLVM_BIN_DIR)"/llvm-objdump -d $(TMPDIR)/cmain | $(CGREP) -e "call.*rust_never_inlined"
-
-rust-executable:
-	$(CLANG) ./clib.c -flto=thin -c -o $(TMPDIR)/clib.o -O2
-	(cd $(TMPDIR); $(AR) crus ./libxyz.a ./clib.o)
-	$(RUSTC) -Clinker-plugin-lto=on -L$(TMPDIR) -Copt-level=2 -Clinker=$(CLANG) -Clink-arg=-fuse-ld=lld ./main.rs -o $(TMPDIR)/rsmain
-	"$(LLVM_BIN_DIR)"/llvm-objdump -d $(TMPDIR)/rsmain | $(CGREP) -e "call.*c_never_inlined"
-	"$(LLVM_BIN_DIR)"/llvm-objdump -d $(TMPDIR)/rsmain | $(CGREP) -v -e "call.*c_always_inlined"

tests/run-make/cross-lang-lto-clang/rmake.rs

@@ -3,8 +3,9 @@
 // See https://github.com/rust-lang/rust/pull/57514
 
 //@ needs-force-clang-based-tests
-// FIXME(#126180): This test doesn't actually run anywhere, because the only
+// NOTE(#126180): This test only runs on `x86_64-gnu-debug`, because that CI job sets
-// CI job that sets RUSTBUILD_FORCE_CLANG_BASED_TESTS runs very few tests.
+// RUSTBUILD_FORCE_CLANG_BASED_TESTS and only runs tests which contain "clang" in their
+// name.
 
 use run_make_support::{clang, env_var, llvm_ar, llvm_objdump, rustc, static_lib_name};
 
@@ -27,14 +28,14 @@ fn main() {
     // Make sure we don't find a call instruction to the function we expect to
     // always be inlined.
     llvm_objdump()
-        .arg("-d")
+        .disassemble()
         .input("cmain")
         .run()
         .assert_stdout_not_contains_regex("call.*rust_always_inlined");
     // As a sanity check, make sure we do find a call instruction to a
     // non-inlined function
     llvm_objdump()
-        .arg("-d")
+        .disassemble()
         .input("cmain")
         .run()
         .assert_stdout_contains_regex("call.*rust_never_inlined");
@@ -49,12 +50,12 @@ fn main() {
         .output("rsmain")
         .run();
     llvm_objdump()
-        .arg("-d")
+        .disassemble()
         .input("rsmain")
         .run()
         .assert_stdout_not_contains_regex("call.*c_always_inlined");
     llvm_objdump()
-        .arg("-d")
+        .disassemble()
         .input("rsmain")
         .run()
         .assert_stdout_contains_regex("call.*c_never_inlined");

tests/run-make/cross-lang-lto-pgo-smoketest-clang/rmake.rs

@@ -5,14 +5,23 @@
 // See https://github.com/rust-lang/rust/pull/61036
 
 //@ needs-force-clang-based-tests
-// FIXME(#126180): This test doesn't actually run anywhere, because the only
+// NOTE(#126180): This test would only run on `x86_64-gnu-debug`, because that CI job sets
-// CI job that sets RUSTBUILD_FORCE_CLANG_BASED_TESTS runs very few tests.
+// RUSTBUILD_FORCE_CLANG_BASED_TESTS and only runs tests which contain "clang" in their
+// name.
+
+//@ needs-profiler-support
+// FIXME(Oneirical): Except that due to the reliance on llvm-profdata, this test
+// never runs, because `x86_64-gnu-debug` does not have the `profiler_builtins` crate.
 
 //FIXME(Oneirical): There was a strange workaround for MSVC on this test
 // which added -C panic=abort to every RUSTC call. It was justified as follows:
-// LLVM doesn't support instrumenting binaries that use SEH:
+
+// "LLVM doesn't support instrumenting binaries that use SEH:
 // https://bugs.llvm.org/show_bug.cgi?id=41279
-// Things work fine with -Cpanic=abort though.
+// Things work fine with -Cpanic=abort though."
+
+// This isn't very pertinent, however, as the test does not get run on any
+// MSVC platforms.
 
 use run_make_support::{
     clang, env_var, has_extension, has_prefix, llvm_ar, llvm_profdata, rfs, run, rustc,

tests/run-make/cross-lang-lto-pgo-smoketest/_Makefile

@@ -1,94 +0,0 @@
-# FIXME(Oneirical): This is already implemented as an rmake.rs file, but due to #126180,
-# the rmake.rs is not ran on CI. Once the rmake test has been proven to work, remove this
-# Makefile.
-
-# needs-force-clang-based-tests
-
-# FIXME(#126180): This test doesn't actually run anywhere, because the only
-# CI job that sets RUSTBUILD_FORCE_CLANG_BASED_TESTS runs very few tests.
-
-# This test makes sure that cross-language inlining can be used in conjunction
-# with profile-guided optimization. The test only tests that the whole workflow
-# can be executed without anything crashing. It does not test whether PGO or
-# xLTO have any specific effect on the generated code.
-
-include ../tools.mk
-
-COMMON_FLAGS=-Copt-level=3 -Ccodegen-units=1
-
-# LLVM doesn't support instrumenting binaries that use SEH:
-# https://bugs.llvm.org/show_bug.cgi?id=41279
-#
-# Things work fine with -Cpanic=abort though.
-ifdef IS_MSVC
-COMMON_FLAGS+= -Cpanic=abort
-endif
-
-all: cpp-executable rust-executable
-
-cpp-executable:
-	$(RUSTC) -Clinker-plugin-lto=on \
-	         -Cprofile-generate="$(TMPDIR)"/cpp-profdata \
-	         -o "$(TMPDIR)"/librustlib-xlto.a \
-	         $(COMMON_FLAGS) \
-	         ./rustlib.rs
-	$(CLANG) -flto=thin \
-	         -fprofile-generate="$(TMPDIR)"/cpp-profdata \
-	         -fuse-ld=lld \
-	         -L "$(TMPDIR)" \
-	         -lrustlib-xlto \
-	         -o "$(TMPDIR)"/cmain \
-	         -O3 \
-	         ./cmain.c
-	$(TMPDIR)/cmain
-	# Postprocess the profiling data so it can be used by the compiler
-	"$(LLVM_BIN_DIR)"/llvm-profdata merge \
-		-o "$(TMPDIR)"/cpp-profdata/merged.profdata \
-		"$(TMPDIR)"/cpp-profdata/default_*.profraw
-	$(RUSTC) -Clinker-plugin-lto=on \
-	         -Cprofile-use="$(TMPDIR)"/cpp-profdata/merged.profdata \
-	         -o "$(TMPDIR)"/librustlib-xlto.a \
-	         $(COMMON_FLAGS) \
-	         ./rustlib.rs
-	$(CLANG) -flto=thin \
-	         -fprofile-use="$(TMPDIR)"/cpp-profdata/merged.profdata \
-	         -fuse-ld=lld \
-	         -L "$(TMPDIR)" \
-	         -lrustlib-xlto \
-	         -o "$(TMPDIR)"/cmain \
-	         -O3 \
-	         ./cmain.c
-
-rust-executable:
-	exit
-	$(CLANG) ./clib.c -fprofile-generate="$(TMPDIR)"/rs-profdata -flto=thin -c -o $(TMPDIR)/clib.o -O3
-	(cd $(TMPDIR); $(AR) crus ./libxyz.a ./clib.o)
-	$(RUSTC) -Clinker-plugin-lto=on \
-	         -Cprofile-generate="$(TMPDIR)"/rs-profdata \
-	         -L$(TMPDIR) \
-	         $(COMMON_FLAGS) \
-	         -Clinker=$(CLANG) \
-	         -Clink-arg=-fuse-ld=lld \
-	         -o $(TMPDIR)/rsmain \
-	         ./main.rs
-	$(TMPDIR)/rsmain
-	# Postprocess the profiling data so it can be used by the compiler
-	"$(LLVM_BIN_DIR)"/llvm-profdata merge \
-		-o "$(TMPDIR)"/rs-profdata/merged.profdata \
-		"$(TMPDIR)"/rs-profdata/default_*.profraw
-	$(CLANG) ./clib.c \
-	         -fprofile-use="$(TMPDIR)"/rs-profdata/merged.profdata \
-	         -flto=thin \
-	         -c \
-	         -o $(TMPDIR)/clib.o \
-	         -O3
-	rm "$(TMPDIR)"/libxyz.a
-	(cd $(TMPDIR); $(AR) crus ./libxyz.a ./clib.o)
-	$(RUSTC) -Clinker-plugin-lto=on \
-	         -Cprofile-use="$(TMPDIR)"/rs-profdata/merged.profdata \
-	         -L$(TMPDIR) \
-	         $(COMMON_FLAGS) \
-	         -Clinker=$(CLANG) \
-	         -Clink-arg=-fuse-ld=lld \
-	         -o $(TMPDIR)/rsmain \
-	         ./main.rs

tests/run-make/cross-lang-lto-riscv-abi/rmake.rs

@@ -3,8 +3,11 @@
 //@ needs-force-clang-based-tests
 //@ needs-llvm-components riscv
 
-// FIXME(#126180): This test doesn't actually run anywhere, because the only
+//@ needs-force-clang-based-tests
-// CI job that sets RUSTBUILD_FORCE_CLANG_BASED_TESTS runs very few tests.
+// FIXME(#126180): This test can only run on `x86_64-gnu-debug`, because that CI job sets
+// RUSTBUILD_FORCE_CLANG_BASED_TESTS and only runs tests which contain "clang" in their
+// name.
+// However, this test does not run at all as its name does not contain "clang".
 
 use std::path::PathBuf;
 use std::process::{Command, Output};

tests/run-make/wasm-override-linker/rmake.rs

@@ -2,6 +2,10 @@
 // $ RUSTBUILD_FORCE_CLANG_BASED_TESTS=1 ./x.py test tests/run-make/wasm-override-linker/
 
 //@ needs-force-clang-based-tests
+// FIXME(#126180): This test can only run on `x86_64-gnu-debug`, because that CI job sets
+// RUSTBUILD_FORCE_CLANG_BASED_TESTS and only runs tests which contain "clang" in their
+// name.
+// However, this test does not run at all as its name does not contain "clang".
 
 use run_make_support::{env_var, rustc, target};