re PR target/65697 (__atomic memory barriers not strong enough for __sync builtins)

2015-06-29  Matthew Wahab  <matthew.wahab@arm.com>

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

From-SVN: r225134

gcc/ChangeLog

 2015-06-29  Matthew Wahab  <matthew.wahab@arm.com>
 
 	PR target/65697
+	* gcc.target/arm/armv-sync-comp-swap.c: New.
+	* gcc.target/arm/armv-sync-op-acquire.c: New.
+	* gcc.target/arm/armv-sync-op-full.c: New.
+	* gcc.target/arm/armv-sync-op-release.c: New.
+
+2015-06-29  Matthew Wahab  <matthew.wahab@arm.com>
+
+	PR target/65697
 	* config/armc/arm.c (arm_split_compare_and_swap): For ARMv8, replace an
 	initial acquire barrier with final barrier.
 

gcc/testsuite/gcc.target/arm/armv8-sync-comp-swap.c

+/* { 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 } } */

gcc/testsuite/gcc.target/arm/armv8-sync-op-acquire.c

+/* { 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 } } */

gcc/testsuite/gcc.target/arm/armv8-sync-op-full.c

+/* { 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 } } */

gcc/testsuite/gcc.target/arm/armv8-sync-op-release.c

+/* { 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 } } */