Fix a variety of testsuite failures on the H8 after recent cselib changes

	PR rtl-optimization/92264
	* config/h8300/h8300.md (mov;add peephole2): Avoid applying when
	the destination is the stack pointer.

gcc/ChangeLog

+2020-04-07  Jeff Law  <law@redhat.com>
+
+	PR rtl-optimization/92264
+	* config/h8300/h8300.md (mov;add peephole2): Avoid applying when
+	the destination is the stack pointer.
+
 2020-04-07  Jakub Jelinek  <jakub@redhat.com>
 
 	PR rtl-optimization/94291

gcc/config/h8300/h8300.md

@@ -4299,6 +4299,7 @@
 	(plus:SI (match_dup 0)
 		 (match_operand:SI 2 "const_int_operand" "")))]
   "(TARGET_H8300H || TARGET_H8300S)
+    && operands[0] != stack_pointer_rtx
     && REG_P (operands[0]) && REG_P (operands[1])
     && REGNO (operands[0]) != REGNO (operands[1])
     && !satisfies_constraint_L (operands[2])