add codegen test for unchecked math

src/test/codegen/unchecked_math.rs

@@ -0,0 +1,46 @@
+#![crate_type = "lib"]
+#![feature(core_intrinsics)]
+
+use std::intrinsics::*;
+
+// CHECK-LABEL: @unchecked_add_signed
+#[no_mangle]
+pub unsafe fn unchecked_add_signed(a: i32, b: i32) -> i32 {
+    // CHECK: add nsw
+    unchecked_add(a, b)
+}
+
+// CHECK-LABEL: @unchecked_add_unsigned
+#[no_mangle]
+pub unsafe fn unchecked_add_unsigned(a: u32, b: u32) -> u32 {
+    // CHECK: add nuw
+    unchecked_add(a, b)
+}
+
+// CHECK-LABEL: @unchecked_sub_signed
+#[no_mangle]
+pub unsafe fn unchecked_sub_signed(a: i32, b: i32) -> i32 {
+    // CHECK: sub nsw
+    unchecked_sub(a, b)
+}
+
+// CHECK-LABEL: @unchecked_sub_unsigned
+#[no_mangle]
+pub unsafe fn unchecked_sub_unsigned(a: u32, b: u32) -> u32 {
+    // CHECK: sub nuw
+    unchecked_sub(a, b)
+}
+
+// CHECK-LABEL: @unchecked_mul_signed
+#[no_mangle]
+pub unsafe fn unchecked_mul_signed(a: i32, b: i32) -> i32 {
+    // CHECK: mul nsw
+    unchecked_mul(a, b)
+}
+
+// CHECK-LABEL: @unchecked_mul_unsigned
+#[no_mangle]
+pub unsafe fn unchecked_mul_unsigned(a: u32, b: u32) -> u32 {
+    // CHECK: mul nuw
+    unchecked_mul(a, b)
+}