Fix link_section regression.

Fixes #27467.

src/test/codegen/link_section.rs

@@ -0,0 +1,36 @@
+// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// compile-flags: -C no-prepopulate-passes
+
+// CHECK: @VAR1 = constant i32 1, section ".test_one"
+#[no_mangle]
+#[link_section = ".test_one"]
+pub static VAR1: u32 = 1;
+
+pub enum E {
+    A(u32),
+    B(f32)
+}
+
+// CHECK: @VAR2 = constant {{.*}} { i32 0, i32 666, {{.*}} }, section ".test_two"
+#[no_mangle]
+#[link_section = ".test_two"]
+pub static VAR2: E = E::A(666);
+
+// CHECK: @VAR3 = constant {{.*}} { i32 1, float 1.000000e+00, {{.*}} }, section ".test_three"
+#[no_mangle]
+#[link_section = ".test_three"]
+pub static VAR3: E = E::B(1.);
+
+// CHECK: define void @fn1() {{.*}} section ".test_four" {
+#[no_mangle]
+#[link_section = ".test_four"]
+pub fn fn1() {}