Updated rust examples

examples/rust/max_array.rs

@@ -1,7 +1,5 @@
-pub fn max_array(x: &mut[i32; 65536], y: &[i32; 65536]) {
+pub fn max_array(x: &mut[f64; 65536], y: &[f64; 65536]) {
   for i in (0..65536) {
-    if y[i] > x[i] {
-      x[i] = y[i];
-    }
+    x[i] = if y[i] > x[i] { y[i] } else { x[i] };
   }
 }

examples/rust/max_array_opt.rs

@@ -0,0 +1,10 @@
+#[allow(unstable)]
+pub fn max_array(x: &mut[f64; 65536], y: &[f64; 65536]) {
+  unsafe {
+    std::intrinsics::assume(x.as_ptr() as usize % 64 == 0);   
+    std::intrinsics::assume(y.as_ptr() as usize % 64 == 0);
+  }
+  for i in (0..65536) {
+    x[i] = if y[i] > x[i] { y[i] } else { x[i] };
+  }
+}

examples/rust/sum_over_array.rs

@@ -0,0 +1,3 @@
+pub fn sum_array(x: &[i32]) -> i32 {
+  x.iter().fold(0, |sum, next| sum + *next)
+}

examples/rust/sum_over_array_opt.rs

@@ -0,0 +1,7 @@
+#[allow(unstable)]
+pub fn sum_array(x: &[i32]) -> i32 {
+  unsafe {
+    std::intrinsics::assume(x.as_ptr() as usize % 64 == 0);   
+  }
+  x.iter().fold(0, |sum, next| sum + *next)
+}