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Use H8 nop moves as tst insns

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gcc
	* config/h8300/jumpcall.md (*branch): When possible, generate
	the comparison in CCZN mode.
	* config/h8300/predicates.md (simple_memory_operand): Reject all
	auto-increment addressing modes.
This commit is contained in:
Jeff Law 2021-07-06 10:55:53 -04:00
parent 5db3ea9d74
commit 73c49ff532
2 changed files with 25 additions and 4 deletions
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27
gcc/config/h8300/jumpcall.md
View file

@ -23,13 +23,32 @@
""
"#"
"&& reload_completed"
[(set (reg:H8cc CC_REG)
(compare:H8cc (match_dup 1) (match_dup 2)))
[(set (match_dup 4)
(match_dup 5))
(set (pc)
(if_then_else (match_op_dup 0
[(reg:H8cc CC_REG) (const_int 0)])
[(match_dup 4) (const_int 0)])
(label_ref (match_dup 3)) (pc)))]
"")
"
{
machine_mode mode;
if (REG_P (operands[1])
&& operands[2] == const0_rtx
&& (GET_CODE (operands[0]) == EQ
|| GET_CODE (operands[0]) == NE
|| GET_CODE (operands[0]) == LT
|| GET_CODE (operands[0]) == GE
/* Our tstxx insns will set ZN and clear V, so we can handle
a couple additional cases. */
|| GET_CODE (operands[0]) == LE
|| GET_CODE (operands[0]) == GT))
mode = E_CCZNmode;
else
mode = E_CCmode;
operands[4] = gen_rtx_REG (mode, CC_REG);
operands[5] = gen_rtx_COMPARE (mode, operands[1], operands[2]);
}")
(define_insn "*branch_1"
[(set (pc)

2
gcc/config/h8300/predicates.md
View file

@ -506,6 +506,8 @@
{
if (GET_MODE (op) == mode
&& (GET_CODE (XEXP (op, 0)) != PRE_DEC
&& GET_CODE (XEXP (op, 0)) != PRE_INC
&& GET_CODE (XEXP (op, 0)) != POST_DEC
&& GET_CODE (XEXP (op, 0)) != POST_INC))
return 1;
return 0;