aarch64: Do not alter force_reg returned register expanding fcmla

2020-11-06  Andrea Corallo  <andrea.corallo@arm.com>

	* config/aarch64/aarch64-builtins.c
	(aarch64_expand_fcmla_builtin): Do not alter force_reg returned
	register.

diff --git a/gcc/config/aarch64/aarch64-builtins.c b/gcc/config/aarch64/aarch64-builtins.c
index 5defdb050fa4210f4031244eb307df5770a4d57b..188fce0589272cbb81a6eba9a49e5470a3d968f6 100644 (file)
--- a/gcc/config/aarch64/aarch64-builtins.c
+++ b/gcc/config/aarch64/aarch64-builtins.c
@@ -1862,10 +1862,10 @@ aarch64_expand_fcmla_builtin (tree exp, rtx target, int fcode)
      only need to know the order in a V2mode.  */
   lane_idx = aarch64_endian_lane_rtx (V2DImode, lane);
 
-  if (!target)
+  if (!target
+      || !REG_P (target)
+      || GET_MODE (target) != d->mode)
     target = gen_reg_rtx (d->mode);
-  else
-    target = force_reg (d->mode, target);
 
   rtx pat = NULL_RTX;