Test alloca with #[repr(align(x))] on enum

Author: niklasf

src/test/codegen/align-enum.rs

@@ -0,0 +1,36 @@
+// compile-flags: -C no-prepopulate-passes
+// ignore-tidy-linelength
+// min-llvm-version 7.0
+
+#![crate_type = "lib"]
+#![feature(repr_align_enum)]
+
+#[repr(align(64))]
+pub enum Align64 {
+    A(u32),
+    B(u32),
+}
+// CHECK: %Align64 = type { [0 x i32], i32, [15 x i32] }
+
+pub struct Nested64 {
+    a: u8,
+    b: Align64,
+    c: u16,
+}
+
+// CHECK-LABEL: @align64
+#[no_mangle]
+pub fn align64(a: u32) -> Align64 {
+// CHECK: %a64 = alloca %Align64, align 64
+// CHECK: call void @llvm.memcpy.{{.*}}(i8* align 64 %{{.*}}, i8* align 64 %{{.*}}, i{{[0-9]+}} 64, i1 false)
+    let a64 = Align64::A(a);
+    a64
+}
+
+// CHECK-LABEL: @nested64
+#[no_mangle]
+pub fn nested64(a: u8, b: u32, c: u16) -> Nested64 {
+// CHECK: %n64 = alloca %Nested64, align 64
+    let n64 = Nested64 { a, b: Align64::B(b), c };
+    n64
+}