From: Richard Sandiford <richard.sandiford@arm.com>
Date: Tue, 29 Jul 2025 14:58:32 +0000 (+0100)
Subject: aarch64: Fix function_expander::get_reg_target
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=668936caf0662a4eea62144c98fdfc8cf30b79d8;p=thirdparty%2Fgcc.git

aarch64: Fix function_expander::get_reg_target

function_expander::get_reg_target didn't actually check for a register,
meaning that it could return a memory target instead.  That doesn't
really matter for the current direct and indirect uses (svundef*,
svcreate*, and svset*) but it will for later patches.

gcc/
	* config/aarch64/aarch64-sve-builtins.cc
	(function_expander::get_reg_target): Check whether the target
	is a valid register_operand.
---

diff --git a/gcc/config/aarch64/aarch64-sve-builtins.cc b/gcc/config/aarch64/aarch64-sve-builtins.cc
index 2b627a95060..01833a8de73 100644
--- a/gcc/config/aarch64/aarch64-sve-builtins.cc
+++ b/gcc/config/aarch64/aarch64-sve-builtins.cc
@@ -4004,7 +4004,8 @@ rtx
 function_expander::get_reg_target ()
 {
   machine_mode target_mode = result_mode ();
-  if (!possible_target || GET_MODE (possible_target) != target_mode)
+  if (!possible_target
+      || !register_operand (possible_target, target_mode))
     possible_target = gen_reg_rtx (target_mode);
   return possible_target;
 }