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-rw-r--r--src/test/run-make-fulldeps/cross-lang-lto-pgo-smoketest/Makefile87
-rw-r--r--src/test/run-make-fulldeps/cross-lang-lto-pgo-smoketest/clib.c9
-rw-r--r--src/test/run-make-fulldeps/cross-lang-lto-pgo-smoketest/cmain.c12
-rw-r--r--src/test/run-make-fulldeps/cross-lang-lto-pgo-smoketest/main.rs11
-rw-r--r--src/test/run-make-fulldeps/cross-lang-lto-pgo-smoketest/rustlib.rs12
5 files changed, 131 insertions, 0 deletions
diff --git a/src/test/run-make-fulldeps/cross-lang-lto-pgo-smoketest/Makefile b/src/test/run-make-fulldeps/cross-lang-lto-pgo-smoketest/Makefile
new file mode 100644
index 000000000..f8efeca56
--- /dev/null
+++ b/src/test/run-make-fulldeps/cross-lang-lto-pgo-smoketest/Makefile
@@ -0,0 +1,87 @@
+# needs-matching-clang
+
+# 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
diff --git a/src/test/run-make-fulldeps/cross-lang-lto-pgo-smoketest/clib.c b/src/test/run-make-fulldeps/cross-lang-lto-pgo-smoketest/clib.c
new file mode 100644
index 000000000..90f33f24d
--- /dev/null
+++ b/src/test/run-make-fulldeps/cross-lang-lto-pgo-smoketest/clib.c
@@ -0,0 +1,9 @@
+#include <stdint.h>
+
+uint32_t c_always_inlined() {
+ return 1234;
+}
+
+__attribute__((noinline)) uint32_t c_never_inlined() {
+ return 12345;
+}
diff --git a/src/test/run-make-fulldeps/cross-lang-lto-pgo-smoketest/cmain.c b/src/test/run-make-fulldeps/cross-lang-lto-pgo-smoketest/cmain.c
new file mode 100644
index 000000000..e3f24828b
--- /dev/null
+++ b/src/test/run-make-fulldeps/cross-lang-lto-pgo-smoketest/cmain.c
@@ -0,0 +1,12 @@
+#include <stdint.h>
+
+// A trivial function defined in Rust, returning a constant value. This should
+// always be inlined.
+uint32_t rust_always_inlined();
+
+
+uint32_t rust_never_inlined();
+
+int main(int argc, char** argv) {
+ return (rust_never_inlined() + rust_always_inlined()) * 0;
+}
diff --git a/src/test/run-make-fulldeps/cross-lang-lto-pgo-smoketest/main.rs b/src/test/run-make-fulldeps/cross-lang-lto-pgo-smoketest/main.rs
new file mode 100644
index 000000000..8129dcb85
--- /dev/null
+++ b/src/test/run-make-fulldeps/cross-lang-lto-pgo-smoketest/main.rs
@@ -0,0 +1,11 @@
+#[link(name = "xyz")]
+extern "C" {
+ fn c_always_inlined() -> u32;
+ fn c_never_inlined() -> u32;
+}
+
+fn main() {
+ unsafe {
+ println!("blub: {}", c_always_inlined() + c_never_inlined());
+ }
+}
diff --git a/src/test/run-make-fulldeps/cross-lang-lto-pgo-smoketest/rustlib.rs b/src/test/run-make-fulldeps/cross-lang-lto-pgo-smoketest/rustlib.rs
new file mode 100644
index 000000000..8a74d74a4
--- /dev/null
+++ b/src/test/run-make-fulldeps/cross-lang-lto-pgo-smoketest/rustlib.rs
@@ -0,0 +1,12 @@
+#![crate_type="staticlib"]
+
+#[no_mangle]
+pub extern "C" fn rust_always_inlined() -> u32 {
+ 42
+}
+
+#[no_mangle]
+#[inline(never)]
+pub extern "C" fn rust_never_inlined() -> u32 {
+ 421
+}