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tcg: Remove add2/sub2 opcodes

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All uses have been replaced by add/sub carry opcodes.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2025-01-20 20:15:31 -08:00
parent 4b0ee858be
commit f2b1708e80
16 changed files with 3 additions and 217 deletions
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36
tcg/tcg.c
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@ -2430,11 +2430,6 @@ bool tcg_op_supported(TCGOpcode op, TCGType type, unsigned flags)
case INDEX_op_st_i32:
return true;
case INDEX_op_add2_i32:
return TCG_TARGET_HAS_add2_i32;
case INDEX_op_sub2_i32:
return TCG_TARGET_HAS_sub2_i32;
case INDEX_op_brcond2_i32:
case INDEX_op_setcond2_i32:
return TCG_TARGET_REG_BITS == 32;
@ -2456,11 +2451,6 @@ bool tcg_op_supported(TCGOpcode op, TCGType type, unsigned flags)
case INDEX_op_extrh_i64_i32:
return TCG_TARGET_REG_BITS == 64;
case INDEX_op_add2_i64:
return TCG_TARGET_HAS_add2_i64;
case INDEX_op_sub2_i64:
return TCG_TARGET_HAS_sub2_i64;
case INDEX_op_mov_vec:
case INDEX_op_dup_vec:
case INDEX_op_dupm_vec:
@ -4101,32 +4091,6 @@ liveness_pass_1(TCGContext *s)
la_reset_pref(ts);
break;
case INDEX_op_add2_i32:
case INDEX_op_add2_i64:
opc_new = INDEX_op_add;
goto do_addsub2;
case INDEX_op_sub2_i32:
case INDEX_op_sub2_i64:
opc_new = INDEX_op_sub;
do_addsub2:
assert_carry_dead(s);
/* Test if the high part of the operation is dead, but not
the low part. The result can be optimized to a simple
add or sub. This happens often for x86_64 guest when the
cpu mode is set to 32 bit. */
if (arg_temp(op->args[1])->state == TS_DEAD) {
if (arg_temp(op->args[0])->state == TS_DEAD) {
goto do_remove;
}
/* Replace the opcode and adjust the args in place,
leaving 3 unused args at the end. */
op->opc = opc = opc_new;
op->args[1] = op->args[2];
op->args[2] = op->args[4];
/* Fall through and mark the single-word operation live. */
}
goto do_not_remove;
case INDEX_op_muls2:
opc_new = INDEX_op_mul;
opc_new2 = INDEX_op_mulsh;