S/390: Reject long disp for vector load/store early

The vector memory instructions only support short displacements.
Reject invalid displacements early to prevent plenty of lay
instructions to be generated later which then cannot be merged
properly.

gcc/ChangeLog:

2019-04-03  Andreas Krebbel  <krebbel@linux.ibm.com>

	* config/s390/s390.c (s390_legitimate_address_p): Reject long
	displacement addresses for vector mode operands.

From-SVN: r270122

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 48b224af02d0f4c9c521ad66ba08fe2e0a507fc5..a280b6c2cc6f29fd324d7b93797c980c8fbd5faf 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2019-04-03  Andreas Krebbel  <krebbel@linux.ibm.com>
+
+       * config/s390/s390.c (s390_legitimate_address_p): Reject long
+       displacement addresses for vector mode operands.
+
 2019-04-03  Claudiu Zissulescu  <claziss@synopsys.com>
 
        * config/arc/arc.c (GMASK_LEN): Define.

diff --git a/gcc/config/s390/s390.c b/gcc/config/s390/s390.c
index bceaca3fbc8b116dc3a112a95b7e52f7b30071f1..e0b62b741f262236a3b9dd4c78ba0bd65eb8a945 100644 (file)
--- a/gcc/config/s390/s390.c
+++ b/gcc/config/s390/s390.c
@@ -4677,6 +4677,17 @@ s390_legitimate_address_p (machine_mode mode, rtx addr, bool strict)
   if (!s390_decompose_address (addr, &ad))
     return false;
 
+  /* The vector memory instructions only support short displacements.
+     Reject invalid displacements early to prevent plenty of lay
+     instructions to be generated later which then cannot be merged
+     properly.  */
+  if (TARGET_VX
+      && VECTOR_MODE_P (mode)
+      && ad.disp != NULL_RTX
+      && CONST_INT_P (ad.disp)
+      && !SHORT_DISP_IN_RANGE (INTVAL (ad.disp)))
+    return false;
+
   if (strict)
     {
       if (ad.base && !REGNO_OK_FOR_BASE_P (REGNO (ad.base)))