Auto merge of #28427 - DiamondLovesYou:gdb-debug-script-load, r=alexcrichton

This is so LLVM isn't forced to load every byte of it. Also sets the alignment of
the load. Adds a test for the debug script section.

r? @alexcrichton 

1 files changed, 25 insertions, 0 deletions

diff --git a/src/test/codegen/gdb_debug_script_load.rs b/src/test/codegen/gdb_debug_script_load.rs
new file mode 100644
index 00000000000..efaca29752b
--- /dev/null
+++ b/src/test/codegen/gdb_debug_script_load.rs
@@ -0,0 +1,25 @@
+// 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.
+
+// ignore-tidy-linelength
+// ignore-windows
+// ignore-macos
+
+// compile-flags: -g -C no-prepopulate-passes
+
+#![feature(start)]
+
+// CHECK-LABEL: @main
+// CHECK: load volatile i8, i8* getelementptr inbounds ([[B:\[[0-9]* x i8\]]], [[B]]* @__rustc_debug_gdb_scripts_section__, i32 0, i32 0), align 1
+
+#[start]
+fn start(_: isize, _: *const *const u8) -> isize {
+    return 0;
+}