[PATCH ARM]Fix memset-inline-* failures on cortex-a9 tune by checking tune information.

[Bin Cheng]

Hi,
This patch is the second part fixing memset-inline-{4,5,6,8,9}.c failures on
cortex-a9.  It adds a function checking CPU tuning information in dejagnu,
it also uses that function to skip related testcase when we are compiling
for cortex-a9 tune.

Build and test on arm-none-eabi.  Is it OK?

gcc/testsuite/ChangeLog
2015-03-06  Bin Cheng  <bin.ch...@arm.com>

        * lib/target-supports.exp (arm_tune_string_ops_prefer_neon): New.
        * gcc.target/arm/memset-inline-4.c: Skip for
        arm_tune_string_ops_prefer_neon.
        * gcc.target/arm/memset-inline-5.c: Ditto.
        * gcc.target/arm/memset-inline-6.c: Ditto.
        * gcc.target/arm/memset-inline-8.c: Ditto.
        * gcc.target/arm/memset-inline-9.c: Ditto.
Index: gcc/testsuite/gcc.target/arm/memset-inline-4.c
===================================================================
--- gcc/testsuite/gcc.target/arm/memset-inline-4.c      (revision 221098)
+++ gcc/testsuite/gcc.target/arm/memset-inline-4.c      (working copy)
@@ -1,6 +1,5 @@
 /* { dg-do run } */
-/* { dg-skip-if "Don't inline memset using neon instructions on cortex-a9" { 
*-*-* } { "-mcpu=cortex-a9" } { "" } } */
-/* { dg-skip-if "Don't inline memset using neon instructions on cortex-a9" { 
*-*-* } { "-mtune=cortex-a9" } { "" } } */
+/* { dg-skip-if "Don't inline memset using neon instructions" { ! 
arm_tune_string_ops_prefer_neon } } */
 /* { dg-options "-save-temps -O2 -fno-inline" } */
 /* { dg-add-options "arm_neon" } */
 
Index: gcc/testsuite/gcc.target/arm/memset-inline-5.c
===================================================================
--- gcc/testsuite/gcc.target/arm/memset-inline-5.c      (revision 221098)
+++ gcc/testsuite/gcc.target/arm/memset-inline-5.c      (working copy)
@@ -1,6 +1,5 @@
 /* { dg-do run } */
-/* { dg-skip-if "Don't inline memset using neon instructions on cortex-a9" { 
*-*-* } { "-mcpu=cortex-a9" } { "" } } */
-/* { dg-skip-if "Don't inline memset using neon instructions on cortex-a9" { 
*-*-* } { "-mtune=cortex-a9" } { "" } } */
+/* { dg-skip-if "Don't inline memset using neon instructions" { ! 
arm_tune_string_ops_prefer_neon } } */
 /* { dg-options "-save-temps -O2 -fno-inline" } */
 /* { dg-add-options "arm_neon" } */
 
Index: gcc/testsuite/gcc.target/arm/memset-inline-6.c
===================================================================
--- gcc/testsuite/gcc.target/arm/memset-inline-6.c      (revision 221098)
+++ gcc/testsuite/gcc.target/arm/memset-inline-6.c      (working copy)
@@ -1,6 +1,5 @@
 /* { dg-do run } */
-/* { dg-skip-if "Don't inline memset using neon instructions on cortex-a9" { 
*-*-* } { "-mcpu=cortex-a9" } { "" } } */
-/* { dg-skip-if "Don't inline memset using neon instructions on cortex-a9" { 
*-*-* } { "-mtune=cortex-a9" } { "" } } */
+/* { dg-skip-if "Don't inline memset using neon instructions" { ! 
arm_tune_string_ops_prefer_neon } } */
 /* { dg-options "-save-temps -O2 -fno-inline" } */
 /* { dg-add-options "arm_neon" } */
 
Index: gcc/testsuite/gcc.target/arm/memset-inline-8.c
===================================================================
--- gcc/testsuite/gcc.target/arm/memset-inline-8.c      (revision 221098)
+++ gcc/testsuite/gcc.target/arm/memset-inline-8.c      (working copy)
@@ -1,6 +1,5 @@
 /* { dg-do run } */
-/* { dg-skip-if "Don't inline memset using neon instructions on cortex-a9" { 
*-*-* } { "-mcpu=cortex-a9" } { "" } } */
-/* { dg-skip-if "Don't inline memset using neon instructions on cortex-a9" { 
*-*-* } { "-mtune=cortex-a9" } { "" } } */
+/* { dg-skip-if "Don't inline memset using neon instructions" { ! 
arm_tune_string_ops_prefer_neon } } */
 /* { dg-options "-save-temps -O2 -fno-inline"  } */
 /* { dg-add-options "arm_neon" } */
 
Index: gcc/testsuite/gcc.target/arm/memset-inline-9.c
===================================================================
--- gcc/testsuite/gcc.target/arm/memset-inline-9.c      (revision 221098)
+++ gcc/testsuite/gcc.target/arm/memset-inline-9.c      (working copy)
@@ -1,6 +1,5 @@
 /* { dg-do run } */
-/* { dg-skip-if "Don't inline memset using neon instructions on cortex-a9" { 
*-*-* } { "-mcpu=cortex-a9" } { "" } } */
-/* { dg-skip-if "Don't inline memset using neon instructions on cortex-a9" { 
*-*-* } { "-mtune=cortex-a9" } { "" } } */
+/* { dg-skip-if "Don't inline memset using neon instructions" { ! 
arm_tune_string_ops_prefer_neon } } */
 /* { dg-options "-save-temps -Os -fno-inline" } */
 /* { dg-add-options "arm_neon" } */
 
Index: gcc/testsuite/lib/target-supports.exp
===================================================================
--- gcc/testsuite/lib/target-supports.exp       (revision 221098)
+++ gcc/testsuite/lib/target-supports.exp       (working copy)
@@ -2954,6 +2954,14 @@ proc check_effective_target_arm_cortex_m { } {
     } "-mthumb"]
 }
 
+# Return 1 if this compilation turns on string_ops_prefer_neon on.
+
+proc check_effective_target_arm_tune_string_ops_prefer_neon { } {
+    return [check_no_messages_and_pattern arm_tune_string_ops_prefer_neon 
"@string_ops_prefer_neon:\t1" assembly {
+       int foo (void) { return 0; }
+    } "-O2 -mprint-tune-info" ]
+}
+
 # Return 1 if the target supports executing NEON instructions, 0
 # otherwise.  Cache the result.