Re: [PATCH v3] PR92398: Fix testcase failure of pr72804.c

[luoxhu <luoxhu@linux.ibm.com>]

Hi,

>> +++ b/gcc/testsuite/gcc.target/powerpc/pr72804-1.c
> 
>> +/* store generates difference instructions as below:
>> +   P9: mtvsrdd;xxlnot;stxv.
>> +   P8/P7/P6 LE: not;not;std;std.
>> +   P8 BE: mtvsrd;mtvsrd;xxpermdi;xxlnor;stxvd2x.
>> +   P7/P6 BE: std;std;addi;lxvd2x;xxlnor;stxvd2x.  */
> 
> But it should generate just the first or second.  So just document that,
> and base the tests around that as well?

check_effective_target_p8 is needed as P7/P6 BE has two unexpected std?
Also I split the store to new head file and rename it to pr92398.h.

Others are updated as below patch, Thanks:


P9LE generated instruction is not worse than P8LE.
mtvsrdd;xxlnot;stxv vs. not;not;std;std.
Update the test case to fix failures.

gcc/testsuite/ChangeLog:

	2019-11-25  Luo Xiong Hu  <luoxhu@linux.ibm.com>

	testsuite/pr92398
	* gcc.target/powerpc/pr72804.c: Split the store function to...
	* gcc.target/powerpc/pr92398.h: ... this one.  New.
	* gcc.target/powerpc/pr92398.p9+.c: New.
	* gcc.target/powerpc/pr92398.p9-.c: New.
	* lib/target-supports.exp (check_effective_target_p8): New.
	(check_effective_target_p9+): New.
---
 gcc/testsuite/gcc.target/powerpc/pr72804.c    | 19 ++++--------------
 gcc/testsuite/gcc.target/powerpc/pr92398.h    | 17 ++++++++++++++++
 .../gcc.target/powerpc/pr92398.p9+.c          | 10 ++++++++++
 .../gcc.target/powerpc/pr92398.p9-.c          | 10 ++++++++++
 gcc/testsuite/lib/target-supports.exp         | 20 +++++++++++++++++++
 5 files changed, 61 insertions(+), 15 deletions(-)
 create mode 100644 gcc/testsuite/gcc.target/powerpc/pr92398.h
 create mode 100644 gcc/testsuite/gcc.target/powerpc/pr92398.p9+.c
 create mode 100644 gcc/testsuite/gcc.target/powerpc/pr92398.p9-.c

diff --git a/gcc/testsuite/gcc.target/powerpc/pr72804.c b/gcc/testsuite/gcc.target/powerpc/pr72804.c
index 10e37caed6b..0b083a44ede 100644
--- a/gcc/testsuite/gcc.target/powerpc/pr72804.c
+++ b/gcc/testsuite/gcc.target/powerpc/pr72804.c
@@ -1,7 +1,6 @@
 /* { dg-do compile { target { lp64 } } } */
-/* { dg-skip-if "" { powerpc*-*-darwin* } } */
 /* { dg-require-effective-target powerpc_vsx_ok } */
-/* { dg-options "-O2 -mvsx -fno-inline-functions --param max-inline-insns-single-O2=200" } */
+/* { dg-options "-O2 -mvsx" } */
 
 __int128_t
 foo (__int128_t *src)
@@ -9,17 +8,7 @@ foo (__int128_t *src)
   return ~*src;
 }
 
-void
-bar (__int128_t *dst, __int128_t src)
-{
-  *dst =  ~src;
-}
 
-/* { dg-final { scan-assembler-times "not " 4 } } */
-/* { dg-final { scan-assembler-times "std " 2 } } */
-/* { dg-final { scan-assembler-times "ld " 2 } } */
-/* { dg-final { scan-assembler-not "lxvd2x" } } */
-/* { dg-final { scan-assembler-not "stxvd2x" } } */
-/* { dg-final { scan-assembler-not "xxpermdi" } } */
-/* { dg-final { scan-assembler-not "mfvsrd" } } */
-/* { dg-final { scan-assembler-not "mfvsrd" } } */
+/* { dg-final { scan-assembler-times {\mld\M} 2 } } */
+/* { dg-final { scan-assembler-times {\mnot\M} 2 } } */
+/* { dg-final { scan-assembler-not {\mlxvd2x\M} } }*/
diff --git a/gcc/testsuite/gcc.target/powerpc/pr92398.h b/gcc/testsuite/gcc.target/powerpc/pr92398.h
new file mode 100644
index 00000000000..184d02d3521
--- /dev/null
+++ b/gcc/testsuite/gcc.target/powerpc/pr92398.h
@@ -0,0 +1,17 @@
+/* This test code is included into pr92398.p9-.c and pr92398.p9+.c.
+   The two files have the tests for the number of instructions generated for
+   P9- versus P9+.
+
+   store generates difference instructions as below:
+   P9+: mtvsrdd;xxlnot;stxv.
+   P8/P7/P6 LE: not;not;std;std.
+   P8 BE: mtvsrd;mtvsrd;xxpermdi;xxlnor;stxvd2x.
+   P7/P6 BE: std;std;addi;lxvd2x;xxlnor;stxvd2x.
+   P9+ and P9- LE are expected, P6/P7/P8 BE are unexpected.  */
+
+void
+bar (__int128_t *dst, __int128_t src)
+{
+  *dst =  ~src;
+}
+
diff --git a/gcc/testsuite/gcc.target/powerpc/pr92398.p9+.c b/gcc/testsuite/gcc.target/powerpc/pr92398.p9+.c
new file mode 100644
index 00000000000..2ebe2025cef
--- /dev/null
+++ b/gcc/testsuite/gcc.target/powerpc/pr92398.p9+.c
@@ -0,0 +1,10 @@
+/* { dg-do compile { target { lp64 && p9+ } } } */
+/* { dg-require-effective-target powerpc_vsx_ok } */
+/* { dg-options "-O2 -mvsx" } */
+
+/* { dg-final { scan-assembler-times {\mmtvsrdd\M} 1 } } */
+/* { dg-final { scan-assembler-times {\mxxlnor\M} 1 } } */
+/* { dg-final { scan-assembler-times {\mstxv\M} 1 } } */
+
+/* Source code for the test in pr92398.h */
+#include "pr92398.h"
diff --git a/gcc/testsuite/gcc.target/powerpc/pr92398.p9-.c b/gcc/testsuite/gcc.target/powerpc/pr92398.p9-.c
new file mode 100644
index 00000000000..eaf0ddb86eb
--- /dev/null
+++ b/gcc/testsuite/gcc.target/powerpc/pr92398.p9-.c
@@ -0,0 +1,10 @@
+/* { dg-do compile { target { lp64 && {! p9+} } } } */
+/* { dg-require-effective-target powerpc_vsx_ok } */
+/* { dg-options "-O2 -mvsx" } */
+
+/* { dg-final { scan-assembler-times {\mnot\M} 2 { xfail be } } } */
+/* { dg-final { scan-assembler-times {\mstd\M} 2 { xfail { {p8} && {be} } } } } */
+
+/* Source code for the test in pr92398.h */
+#include "pr92398.h"
+
diff --git a/gcc/testsuite/lib/target-supports.exp b/gcc/testsuite/lib/target-supports.exp
index 751045d4744..9e13f56dd70 100644
--- a/gcc/testsuite/lib/target-supports.exp
+++ b/gcc/testsuite/lib/target-supports.exp
@@ -2585,6 +2585,26 @@ proc check_effective_target_le { } {
     }]
 }
 
+# Return 1 if we're generating code for only power8 platforms.
+
+proc check_effective_target_p8 {  } {
+  return [check_no_compiler_messages_nocache p8 assembly {
+	#if !(!defined(_ARCH_PWR9) && defined(_ARCH_PWR8))
+	#error NO
+	#endif
+  } ""]
+}
+
+# Return 1 if we're generating code for power9 and future platforms.
+
+proc check_effective_target_p9+ {  } {
+  return [check_no_compiler_messages_nocache p9+ assembly {
+	#if !(defined(_ARCH_PWR9))
+	#error NO
+	#endif
+  } ""]
+}
+
 # Return 1 if we're generating 32-bit code using default options, 0
 # otherwise.
 
-- 
2.21.0.777.g83232e3864