From c606e97cc6fb06130b1c8e79292fc1f3c8965a0c Mon Sep 17 00:00:00 2001
From: Josh Stone <jistone@redhat.com>
Date: Fri, 8 Sep 2017 15:55:28 -0700
Subject: [PATCH] Add a test for `min_global_align`

---
 src/test/run-make/min-global-align/Makefile   | 22 +++++++++++
 .../min-global-align/min_global_align.rs      | 38 +++++++++++++++++++
 2 files changed, 60 insertions(+)
 create mode 100644 src/test/run-make/min-global-align/Makefile
 create mode 100644 src/test/run-make/min-global-align/min_global_align.rs

diff --git a/src/test/run-make/min-global-align/Makefile b/src/test/run-make/min-global-align/Makefile
new file mode 100644
index 00000000000..2eacc36f380
--- /dev/null
+++ b/src/test/run-make/min-global-align/Makefile
@@ -0,0 +1,22 @@
+-include ../tools.mk
+
+# This tests ensure that global variables respect the target minimum alignment.
+# The three bools `STATIC_BOOL`, `STATIC_MUT_BOOL`, and `CONST_BOOL` all have
+# type-alignment of 1, but some targets require greater global alignment.
+
+SRC = min_global_align.rs
+LL = $(TMPDIR)/min_global_align.ll
+
+all:
+ifeq ($(UNAME),Linux)
+# Most targets are happy with default alignment -- take i686 for example.
+ifeq ($(filter x86,$(LLVM_COMPONENTS)),x86)
+	$(RUSTC) --target=i686-unknown-linux-gnu --emit=llvm-ir $(SRC)
+	[ "$$(grep -c 'align 1' "$(LL)")" -eq "3" ]
+endif
+# SystemZ requires even alignment for PC-relative addressing.
+ifeq ($(filter systemz,$(LLVM_COMPONENTS)),systemz)
+	$(RUSTC) --target=s390x-unknown-linux-gnu --emit=llvm-ir $(SRC)
+	[ "$$(grep -c 'align 2' "$(LL)")" -eq "3" ]
+endif
+endif
diff --git a/src/test/run-make/min-global-align/min_global_align.rs b/src/test/run-make/min-global-align/min_global_align.rs
new file mode 100644
index 00000000000..3d4f9001a74
--- /dev/null
+++ b/src/test/run-make/min-global-align/min_global_align.rs
@@ -0,0 +1,38 @@
+// Copyright 2017 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.
+
+#![feature(no_core, lang_items)]
+#![crate_type="rlib"]
+#![no_core]
+
+pub static STATIC_BOOL: bool = true;
+
+pub static mut STATIC_MUT_BOOL: bool = true;
+
+const CONST_BOOL: bool = true;
+pub static CONST_BOOL_REF: &'static bool = &CONST_BOOL;
+
+
+#[lang = "sized"]
+trait Sized {}
+
+#[lang = "copy"]
+trait Copy {}
+
+#[lang = "freeze"]
+trait Freeze {}
+
+#[lang = "sync"]
+trait Sync {}
+impl Sync for bool {}
+impl Sync for &'static bool {}
+
+#[lang="drop_in_place"]
+pub unsafe fn drop_in_place<T: ?Sized>(_: *mut T) { }