From: Tomas Glozar <tglozar@gmail.com>
Date: Thu, 8 Jan 2026 15:42:01 +0000 (-0700)
Subject: [PATCH 2/2] ia64: Expand MAX_VECT_LEN to 16
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=92d621d9ea0aad3c01c2982ee1b051453945751b;p=thirdparty%2Fgcc.git

[PATCH 2/2] ia64: Expand MAX_VECT_LEN to 16

MAX_VECT_LEN is set to 8 on ia64, which is lower than on all other
targets, where it is 16 at minimum.

Some of the machine modes of ia64 are internally 16-byte wide,
causing stringop-overflow to be unhappy when checking a loop in
ia64_vectorize_vec_perm_const(). This causes bootstrap to fail.

Make stringop-overflow happy by raising the length to 16.

gcc/ChangeLog:

	* config/ia64/ia64.cc (MAX_VECT_LEN): Set to 16 from 8.
---

diff --git a/gcc/config/ia64/ia64.cc b/gcc/config/ia64/ia64.cc
index 055af3e8617..92ae6472c3c 100644
--- a/gcc/config/ia64/ia64.cc
+++ b/gcc/config/ia64/ia64.cc
@@ -343,7 +343,7 @@ static bool ia64_modes_tieable_p (machine_mode, machine_mode);
 static bool ia64_can_change_mode_class (machine_mode, machine_mode,
 					reg_class_t);
 
-#define MAX_VECT_LEN	8
+#define MAX_VECT_LEN	16
 
 struct expand_vec_perm_d
 {