[PATCH 3/3][ARM][PR target/65697] Add tests for __sync builtins.

[Matthew Wahab <matthew dot wahab at arm dot com>]

This is the ARM version of the patches to strengthen memory barriers for the
__sync builtins on ARMv8 targets
(https://gcc.gnu.org/ml/gcc-patches/2015-05/msg01989.html).

This patch adds tests for the code generated by the ARM backend for the __sync
builtins.

Tested the series for arm-none-linux-gnueabihf with check-gcc.

Ok for trunk?
Matthew

gcc/testsuite
2015-06-22  Matthew Wahab  <matthew.wahab@arm.com>

	PR Target/65697
	* gcc.target/arm/armv8-sync-comp-swap.c: New.
	* gcc.target/arm/armv8-sync-op-acquire.c: New.
	* gcc.target/arm/armv8-sync-op-full.c: New.
	* gcc.target/arm/armv8-sync-op-release.c: New.

From 8157c7480a9d6d559013d02e24519d1b7ba1ed5b Mon Sep 17 00:00:00 2001
From: Matthew Wahab <matthew.wahab@arm.com>
Date: Wed, 3 Jun 2015 16:27:55 +0100
Subject: [PATCH 3/3] [ARM] Add test cases.

Change-Id: I0f2257ce5b5e7f9d0f75e57e6be22fd9733ed3ca
---
 gcc/testsuite/gcc.target/arm/armv8-sync-comp-swap.c  | 10 ++++++++++
 gcc/testsuite/gcc.target/arm/armv8-sync-op-acquire.c | 10 ++++++++++
 gcc/testsuite/gcc.target/arm/armv8-sync-op-full.c    | 10 ++++++++++
 gcc/testsuite/gcc.target/arm/armv8-sync-op-release.c |  8 ++++++++
 4 files changed, 38 insertions(+)
 create mode 100644 gcc/testsuite/gcc.target/arm/armv8-sync-comp-swap.c
 create mode 100644 gcc/testsuite/gcc.target/arm/armv8-sync-op-acquire.c
 create mode 100644 gcc/testsuite/gcc.target/arm/armv8-sync-op-full.c
 create mode 100644 gcc/testsuite/gcc.target/arm/armv8-sync-op-release.c

diff --git a/gcc/testsuite/gcc.target/arm/armv8-sync-comp-swap.c b/gcc/testsuite/gcc.target/arm/armv8-sync-comp-swap.c
new file mode 100644
index 0000000..f96c81a
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/armv8-sync-comp-swap.c
@@ -0,0 +1,10 @@
+/* { dg-do compile } */
+/* { do-require-effective-target arm_arch_v8a_ok } */
+/* { dg-options "-O2" } */
+/* { dg-add-options arm_arch_v8a } */
+
+#include "../aarch64/sync-comp-swap.x"
+
+/* { dg-final { scan-assembler-times "ldrex" 2 } } */
+/* { dg-final { scan-assembler-times "stlex" 2 } } */
+/* { dg-final { scan-assembler-times "dmb" 2 } } */
diff --git a/gcc/testsuite/gcc.target/arm/armv8-sync-op-acquire.c b/gcc/testsuite/gcc.target/arm/armv8-sync-op-acquire.c
new file mode 100644
index 0000000..8d6659b
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/armv8-sync-op-acquire.c
@@ -0,0 +1,10 @@
+/* { dg-do compile } */
+/* { do-require-effective-target arm_arch_v8a_ok } */
+/* { dg-options "-O2" } */
+/* { dg-add-options arm_arch_v8a } */
+
+#include "../aarch64/sync-op-acquire.x"
+
+/* { dg-final { scan-assembler-times "ldrex" 1 } } */
+/* { dg-final { scan-assembler-times "stlex" 1 } } */
+/* { dg-final { scan-assembler-times "dmb" 1 } } */
diff --git a/gcc/testsuite/gcc.target/arm/armv8-sync-op-full.c b/gcc/testsuite/gcc.target/arm/armv8-sync-op-full.c
new file mode 100644
index 0000000..a5ad3bd
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/armv8-sync-op-full.c
@@ -0,0 +1,10 @@
+/* { dg-do compile } */
+/* { do-require-effective-target arm_arch_v8a_ok } */
+/* { dg-options "-O2" } */
+/* { dg-add-options arm_arch_v8a } */
+
+#include "../aarch64/sync-op-full.x"
+
+/* { dg-final { scan-assembler-times "ldrex" 12 } } */
+/* { dg-final { scan-assembler-times "stlex" 12 } } */
+/* { dg-final { scan-assembler-times "dmb" 12 } } */
diff --git a/gcc/testsuite/gcc.target/arm/armv8-sync-op-release.c b/gcc/testsuite/gcc.target/arm/armv8-sync-op-release.c
new file mode 100644
index 0000000..0d3be7b
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/armv8-sync-op-release.c
@@ -0,0 +1,8 @@
+/* { dg-do compile } */
+/* { do-require-effective-target arm_arch_v8a_ok } */
+/* { dg-options "-O2" } */
+/* { dg-add-options arm_arch_v8a } */
+
+#include "../aarch64/sync-op-release.x"
+
+/* { dg-final { scan-assembler-times "stl" 1 } } */
-- 
1.9.1