From: Stefan Schulze Frielinghaus <stefansf@gcc.gnu.org>
Date: Thu, 9 Jan 2025 16:49:02 +0000 (+0100)
Subject: s390: Fix s390_constant_via_vgbm_p() [PR118362]
X-Git-Tag: basepoints/gcc-16~2811
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=2f31819a0ac7b000fa3a456e5b068242e954edac;p=thirdparty%2Fgcc.git

s390: Fix s390_constant_via_vgbm_p() [PR118362]

Optimization s390_constant_via_vgbm_p() should only apply to constant
vectors which can be expressed by the hardware, i.e., which have a size
of at most 16-bytes, similar as it is done for s390_constant_via_vgm_p()
and s390_constant_via_vrepi_p().

gcc/ChangeLog:

	PR target/118362
	* config/s390/s390.cc (s390_constant_via_vgbm_p): Allow at most
	16-byte vectors.
---

diff --git a/gcc/config/s390/s390.cc b/gcc/config/s390/s390.cc
index 918a2cd6c6df..08acb69de3e8 100644
--- a/gcc/config/s390/s390.cc
+++ b/gcc/config/s390/s390.cc
@@ -2818,7 +2818,7 @@ s390_constant_via_vgbm_p (rtx op, unsigned *mask)
   unsigned tmp_mask = 0;
   int nunit, unit_size;
 
-  if (GET_CODE (op) == CONST_VECTOR)
+  if (GET_CODE (op) == CONST_VECTOR && GET_MODE_SIZE (GET_MODE (op)) <= 16)
     {
       if (GET_MODE_INNER (GET_MODE (op)) == TImode
 	  || GET_MODE_INNER (GET_MODE (op)) == TFmode)