Add tests

Author: JohnTitor

src/test/codegen/repr-u128.rs

@@ -0,0 +1,17 @@
+// compile-flags: --emit=llvm-ir -C debuginfo=2
+#![feature(repr128)]
+
+#[repr(u128)]
+pub enum Foo {
+    Lo,
+    Hi = 1 << 64,
+}
+
+pub fn foo() -> Option<Foo> {
+    None
+}
+
+// CHECK: declare void @llvm.dbg.value
+fn main() {
+    let vals = (Some(Foo::Lo), None::<Foo>);
+}

src/test/debuginfo/repr-u128.rs

@@ -0,0 +1,17 @@
+// compile-flags: --emit=llvm-ir -C debuginfo=2
+#![feature(repr128)]
+
+#[repr(u128)]
+pub enum Foo {
+    Lo,
+    Hi = 1 << 64,
+}
+
+pub fn foo() -> Option<Foo> {
+    None
+}
+
+// CHECK: declare void @llvm.dbg.value
+fn main() {
+    let vals = (Some(Foo::Lo), None::<Foo>);
+}