Add some benchmarks

2 files changed, 78 insertions, 0 deletions

diff --git a/example/alloc_example.rs b/example/alloc_example.rs
new file mode 100644
index 00000000000..06746ab1f76
--- /dev/null
+++ b/example/alloc_example.rs
@@ -0,0 +1,41 @@
+#![feature(start, box_syntax, alloc_system, core_intrinsics, alloc, alloc_error_handler)]
+#![no_std]
+
+extern crate alloc;
+extern crate alloc_system;
+
+use alloc::prelude::*;
+
+use alloc_system::System;
+
+#[global_allocator]
+static ALLOC: System = System;
+
+#[link(name = "c")]
+extern "C" {
+    fn puts(s: *const u8);
+}
+
+#[panic_handler]
+fn panic_handler(_: &core::panic::PanicInfo) -> ! {
+    unsafe {
+        core::intrinsics::abort();
+    }
+}
+
+#[alloc_error_handler]
+fn alloc_error_handler(_: alloc::alloc::Layout) -> ! {
+    unsafe {
+        core::intrinsics::abort();
+    }
+}
+
+#[start]
+fn main(_argc: isize, _argv: *const *const u8) -> isize {
+    let world: Box<&str> = box "Hello World!\0";
+    unsafe {
+        puts(*world as *const str as *const u8);
+    }
+
+    0
+}
diff --git a/example/mod_bench.rs b/example/mod_bench.rs
new file mode 100644
index 00000000000..2e2b0052dee
--- /dev/null
+++ b/example/mod_bench.rs
@@ -0,0 +1,37 @@
+#![feature(start, box_syntax, core_intrinsics, lang_items)]
+#![no_std]
+
+#[link(name = "c")]
+extern {}
+
+#[panic_handler]
+fn panic_handler(_: &core::panic::PanicInfo) -> ! {
+    unsafe {
+        core::intrinsics::abort();
+    }
+}
+
+#[lang="eh_personality"]
+fn eh_personality(){}
+
+// Required for rustc_codegen_llvm
+#[no_mangle]
+unsafe extern "C" fn _Unwind_Resume() {
+    core::intrinsics::unreachable();
+}
+
+#[start]
+fn main(_argc: isize, _argv: *const *const u8) -> isize {
+    for i in 2..100_000_000 {
+        black_box((i + 1) % i);
+    }
+
+    0
+}
+
+#[inline(never)]
+fn black_box(i: u32) {
+    if i != 1 {
+        unsafe { core::intrinsics::abort(); }
+    }
+}