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* [PATCH] S/390: Emit vector alignment hints for z13 if AS accepts them [BACKPORT GCC9]
@ 2020-07-09  7:35 Stefan Schulze Frielinghaus
  2020-07-09  7:47 ` Stefan Schulze Frielinghaus
  2020-07-16  7:36 ` Andreas Krebbel
  0 siblings, 2 replies; 3+ messages in thread
From: Stefan Schulze Frielinghaus @ 2020-07-09  7:35 UTC (permalink / raw)
  To: gcc-patches, krebbel

Bootstrapped and regtested on s390x with and without a patched gas. Ok
for master?

gcc/ChangeLog:

	* config.in: Regenerate.
	* config/s390/s390.c (print_operand): Emit vector alignment hints
	for target z13, if AS accepts them.  For other targets the logic
	stays the same.
	* config/s390/s390.h (TARGET_VECTOR_LOADSTORE_ALIGNMENT_HINTS): Define
	macro.
	* configure: Regenerate.
	* configure.ac: Check HAVE_AS_VECTOR_LOADSTORE_ALIGNMENT_HINTS_ON_Z13.

gcc/testsuite/ChangeLog:

	* gcc.target/s390/vector/align-1.c: Change target architecture
	to z13.
	* gcc.target/s390/vector/align-2.c: Change target architecture
	to z13.

(cherry picked from commit 929fd91ba975eebf9e57f7f092041271dcaf0c34)
(squashed with commit 87cb9423add08743d8bb3368f0af61ddc9572837)
---
 gcc/config.in                                 |  7 +++++
 gcc/config/s390/s390.c                        |  4 +--
 gcc/config/s390/s390.h                        |  7 +++++
 gcc/configure                                 | 31 +++++++++++++++++++
 gcc/configure.ac                              |  5 +++
 .../gcc.target/s390/vector/align-1.c          |  2 +-
 .../gcc.target/s390/vector/align-2.c          |  2 +-
 7 files changed, 53 insertions(+), 5 deletions(-)

diff --git a/gcc/config.in b/gcc/config.in
index a718ceaf3da..bfef2340339 100644
--- a/gcc/config.in
+++ b/gcc/config.in
@@ -676,6 +676,13 @@
 #endif
 
 
+/* Define if your assembler supports vl/vst/vlm/vstm with an optional
+   alignment hint argument on z13. */
+#ifndef USED_FOR_TARGET
+#undef HAVE_AS_VECTOR_LOADSTORE_ALIGNMENT_HINTS_ON_Z13
+#endif
+
+
 /* Define if your assembler supports VSX instructions. */
 #ifndef USED_FOR_TARGET
 #undef HAVE_AS_VSX
diff --git a/gcc/config/s390/s390.c b/gcc/config/s390/s390.c
index db3f94978ec..fb0ef44c196 100644
--- a/gcc/config/s390/s390.c
+++ b/gcc/config/s390/s390.c
@@ -7766,15 +7766,13 @@ print_operand (FILE *file, rtx x, int code)
   switch (code)
     {
     case 'A':
-#ifdef HAVE_AS_VECTOR_LOADSTORE_ALIGNMENT_HINTS
-      if (TARGET_Z14 && MEM_P (x))
+      if (TARGET_VECTOR_LOADSTORE_ALIGNMENT_HINTS && MEM_P (x))
 	{
 	  if (MEM_ALIGN (x) >= 128)
 	    fprintf (file, ",4");
 	  else if (MEM_ALIGN (x) == 64)
 	    fprintf (file, ",3");
 	}
-#endif
       return;
     case 'C':
       fprintf (file, s390_branch_condition_mnemonic (x, FALSE));
diff --git a/gcc/config/s390/s390.h b/gcc/config/s390/s390.h
index f7023d985f1..bd5316ffe94 100644
--- a/gcc/config/s390/s390.h
+++ b/gcc/config/s390/s390.h
@@ -167,6 +167,13 @@ enum processor_flags
 	(TARGET_VX && TARGET_CPU_VXE2)
 #define TARGET_VXE2_P(opts)						\
 	(TARGET_VX_P (opts) && TARGET_CPU_VXE2_P (opts))
+#if defined(HAVE_AS_VECTOR_LOADSTORE_ALIGNMENT_HINTS_ON_Z13)
+#define TARGET_VECTOR_LOADSTORE_ALIGNMENT_HINTS TARGET_Z13
+#elif defined(HAVE_AS_VECTOR_LOADSTORE_ALIGNMENT_HINTS)
+#define TARGET_VECTOR_LOADSTORE_ALIGNMENT_HINTS TARGET_Z14
+#else
+#define TARGET_VECTOR_LOADSTORE_ALIGNMENT_HINTS 0
+#endif
 
 #ifdef HAVE_AS_MACHINE_MACHINEMODE
 #define S390_USE_TARGET_ATTRIBUTE 1
diff --git a/gcc/configure b/gcc/configure
index a065ba23728..35f5a87983b 100755
--- a/gcc/configure
+++ b/gcc/configure
@@ -27779,6 +27779,37 @@ if test $gcc_cv_as_s390_vector_loadstore_alignment_hints = yes; then
 
 $as_echo "#define HAVE_AS_VECTOR_LOADSTORE_ALIGNMENT_HINTS 1" >>confdefs.h
 
+fi
+
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking assembler for vector load/store alignment hints on z13" >&5
+$as_echo_n "checking assembler for vector load/store alignment hints on z13... " >&6; }
+if ${gcc_cv_as_s390_vector_loadstore_alignment_hints_on_z13+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  gcc_cv_as_s390_vector_loadstore_alignment_hints_on_z13=no
+  if test x$gcc_cv_as != x; then
+    $as_echo '	vl %v24,0(%r15),3 ' > conftest.s
+    if { ac_try='$gcc_cv_as $gcc_cv_as_flags -mzarch -march=z13 -o conftest.o conftest.s >&5'
+  { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; }
+    then
+	gcc_cv_as_s390_vector_loadstore_alignment_hints_on_z13=yes
+    else
+      echo "configure: failed program was" >&5
+      cat conftest.s >&5
+    fi
+    rm -f conftest.o conftest.s
+  fi
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $gcc_cv_as_s390_vector_loadstore_alignment_hints_on_z13" >&5
+$as_echo "$gcc_cv_as_s390_vector_loadstore_alignment_hints_on_z13" >&6; }
+if test $gcc_cv_as_s390_vector_loadstore_alignment_hints_on_z13 = yes; then
+
+$as_echo "#define HAVE_AS_VECTOR_LOADSTORE_ALIGNMENT_HINTS_ON_Z13 1" >>confdefs.h
+
 fi
 
 
diff --git a/gcc/configure.ac b/gcc/configure.ac
index 3a7251102ef..eef4f1acd01 100644
--- a/gcc/configure.ac
+++ b/gcc/configure.ac
@@ -4908,6 +4908,11 @@ pointers into PC-relative form.])
       [	vl %v24,0(%r15),3 ],,
       [AC_DEFINE(HAVE_AS_VECTOR_LOADSTORE_ALIGNMENT_HINTS, 1,
 	  [Define if your assembler supports vl/vst/vlm/vstm with an optional alignment hint argument.])])
+    gcc_GAS_CHECK_FEATURE([vector load/store alignment hints on z13],
+      gcc_cv_as_s390_vector_loadstore_alignment_hints_on_z13,, [-mzarch -march=z13],
+      [	vl %v24,0(%r15),3 ],,
+      [AC_DEFINE(HAVE_AS_VECTOR_LOADSTORE_ALIGNMENT_HINTS_ON_Z13, 1,
+	  [Define if your assembler supports vl/vst/vlm/vstm with an optional alignment hint argument on z13.])])
 
     ;;
 esac
diff --git a/gcc/testsuite/gcc.target/s390/vector/align-1.c b/gcc/testsuite/gcc.target/s390/vector/align-1.c
index cc7777ad22a..6997af2ddcd 100644
--- a/gcc/testsuite/gcc.target/s390/vector/align-1.c
+++ b/gcc/testsuite/gcc.target/s390/vector/align-1.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O3 -mzarch -march=z14" } */
+/* { dg-options "-O3 -mzarch -march=z13" } */
 
 /* The user alignment ends up in DECL_ALIGN of the VAR_DECL and is
    currently ignored if it is smaller than the alignment of the type.
diff --git a/gcc/testsuite/gcc.target/s390/vector/align-2.c b/gcc/testsuite/gcc.target/s390/vector/align-2.c
index e4e2fba6a58..00e09d3eadb 100644
--- a/gcc/testsuite/gcc.target/s390/vector/align-2.c
+++ b/gcc/testsuite/gcc.target/s390/vector/align-2.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O3 -mzarch -march=z14" } */
+/* { dg-options "-O3 -mzarch -march=z13" } */
 
 /* The user alignment ends up in TYPE_ALIGN of the type of the
    VAR_DECL.  */
-- 
2.26.2


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2020-07-09  7:35 [PATCH] S/390: Emit vector alignment hints for z13 if AS accepts them [BACKPORT GCC9] Stefan Schulze Frielinghaus
2020-07-09  7:47 ` Stefan Schulze Frielinghaus
2020-07-16  7:36 ` Andreas Krebbel

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