[gcc r14-3894] aarch64: Minor initial adjustment tweak

[Richard Sandiford <rsandifo@gcc.gnu.org>]

https://gcc.gnu.org/g:ee5466ff4faca2076cc61f1f120d0b5062c8111c

commit r14-3894-gee5466ff4faca2076cc61f1f120d0b5062c8111c
Author: Richard Sandiford <richard.sandiford@arm.com>
Date:   Tue Sep 12 16:05:10 2023 +0100

    aarch64: Minor initial adjustment tweak
    
    This patch just changes a calculation of initial_adjust
    to one that makes it slightly more obvious that the total
    adjustment is frame.frame_size.
    
    gcc/
            * config/aarch64/aarch64.cc (aarch64_layout_frame): Tweak
            calculation of initial_adjust for frames in which all saves
            are SVE saves.

Diff:
---
 gcc/config/aarch64/aarch64.cc | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/gcc/config/aarch64/aarch64.cc b/gcc/config/aarch64/aarch64.cc
index 9578592d2563..e40ccc7d1cf8 100644
--- a/gcc/config/aarch64/aarch64.cc
+++ b/gcc/config/aarch64/aarch64.cc
@@ -8714,11 +8714,10 @@ aarch64_layout_frame (void)
     {
       /* Frame in which all saves are SVE saves:
 
-	 sub sp, sp, hard_fp_offset + below_hard_fp_saved_regs_size
+	 sub sp, sp, frame_size - bytes_below_saved_regs
 	 save SVE registers relative to SP
 	 sub sp, sp, bytes_below_saved_regs  */
-      frame.initial_adjust = (frame.bytes_above_hard_fp
-			      + frame.below_hard_fp_saved_regs_size);
+      frame.initial_adjust = frame.frame_size - frame.bytes_below_saved_regs;
       frame.final_adjust = frame.bytes_below_saved_regs;
     }
   else if (frame.bytes_above_hard_fp.is_constant (&const_above_fp)