commit 709b2160bcd8f6f57c8754c73d40550895339c7b
Author: Jeff Law <jeffreyalaw@gmail.com>
Date:   Sun Oct 16 10:58:52 2022 -0400

    Rename "z" constraint to "Zz" on the H8/300
    
    I want to use Z as a multi-letter constraint.  So first we have to
    adjust the existing use of Z.  This does not affect code generation.
    
    gcc/
            * config/h8300/constraints.md (Zz constraint): Renamed
            from "z".
            * config/h8300/movepush.md (movqi_h8sx, movhi_h8sx): Adjust
            constraint to use Zz instead of Z.

diff --git a/gcc/config/h8300/constraints.md b/gcc/config/h8300/constraints.md
index 2836232d882..f71996c5f38 100644
--- a/gcc/config/h8300/constraints.md
+++ b/gcc/config/h8300/constraints.md
@@ -211,7 +211,7 @@
   (and (match_code "const_int")
        (match_test "exact_log2 (ival & 0xff) != -1")))
 
-(define_constraint "Z"
+(define_constraint "Zz"
   "@internal"
   (and (match_test "TARGET_H8300SX")
        (match_code "mem")
diff --git a/gcc/config/h8300/movepush.md b/gcc/config/h8300/movepush.md
index ada4ddd0beb..e895de8ce59 100644
--- a/gcc/config/h8300/movepush.md
+++ b/gcc/config/h8300/movepush.md
@@ -28,7 +28,7 @@
   [(set (attr "length") (symbol_ref "compute_mov_length (operands)"))])
 
 (define_insn_and_split "*movqi_h8sx"
-  [(set (match_operand:QI 0 "general_operand_dst" "=Z,rQ")
+  [(set (match_operand:QI 0 "general_operand_dst" "=Zz,rQ")
 	(match_operand:QI 1 "general_operand_src" "P4>X,rQi"))]
   "TARGET_H8300SX"
   "#"
@@ -37,7 +37,7 @@
 	      (clobber (reg:CC CC_REG))])])
 
 (define_insn "*movqi_h8sx<cczn>"
-  [(set (match_operand:QI 0 "general_operand_dst" "=Z,rQ")
+  [(set (match_operand:QI 0 "general_operand_dst" "=Zz,rQ")
 	(match_operand:QI 1 "general_operand_src" "P4>X,rQi"))
    (clobber (reg:CC CC_REG))]
   "TARGET_H8300SX"
@@ -113,7 +113,7 @@
   [(set (attr "length") (symbol_ref "compute_mov_length (operands)"))])
 
 (define_insn_and_split "*movhi_h8sx"
-  [(set (match_operand:HI 0 "general_operand_dst" "=r,r,Z,Q,rQ")
+  [(set (match_operand:HI 0 "general_operand_dst" "=r,r,Zz,Q,rQ")
 	(match_operand:HI 1 "general_operand_src" "I,P3>X,P4>X,IP8>X,rQi"))]
   "TARGET_H8300SX"
   "#"
@@ -122,7 +122,7 @@
 	      (clobber (reg:CC CC_REG))])])
   
 (define_insn "*movhi_h8sx<cczn>"
-  [(set (match_operand:HI 0 "general_operand_dst" "=r,r,Z,Q,rQ")
+  [(set (match_operand:HI 0 "general_operand_dst" "=r,r,Zz,Q,rQ")
 	(match_operand:HI 1 "general_operand_src" "I,P3>X,P4>X,IP8>X,rQi"))
    (clobber (reg:CC CC_REG))]
   "TARGET_H8300SX"