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tcg/optimize: Split out fold_dup, fold_dup2 

Reviewed-by: Luis Pires <luis.pires@eldorado.org.br>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2021-08-24 12:06:33 -07:00
parent 09bacdc263
commit 8cdb3fcb8e
1 changed files with 31 additions and 22 deletions
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53
tcg/optimize.c
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@ -920,6 +920,31 @@ static bool fold_divide(OptContext *ctx, TCGOp *op)
return fold_const2(ctx, op);
}
static bool fold_dup(OptContext *ctx, TCGOp *op)
{
if (arg_is_const(op->args[1])) {
uint64_t t = arg_info(op->args[1])->val;
t = dup_const(TCGOP_VECE(op), t);
return tcg_opt_gen_movi(ctx, op, op->args[0], t);
}
return false;
}
static bool fold_dup2(OptContext *ctx, TCGOp *op)
{
if (arg_is_const(op->args[1]) && arg_is_const(op->args[2])) {
uint64_t t = deposit64(arg_info(op->args[1])->val, 32, 32,
arg_info(op->args[2])->val);
return tcg_opt_gen_movi(ctx, op, op->args[0], t);
}
if (args_are_copies(op->args[1], op->args[2])) {
op->opc = INDEX_op_dup_vec;
TCGOP_VECE(op) = MO_32;
}
return false;
}
static bool fold_eqv(OptContext *ctx, TCGOp *op)
{
return fold_const2(ctx, op);
@ -1731,28 +1756,6 @@ void tcg_optimize(TCGContext *s)
done = tcg_opt_gen_mov(&ctx, op, op->args[0], op->args[1]);
break;
case INDEX_op_dup_vec:
if (arg_is_const(op->args[1])) {
tmp = arg_info(op->args[1])->val;
tmp = dup_const(TCGOP_VECE(op), tmp);
tcg_opt_gen_movi(&ctx, op, op->args[0], tmp);
continue;
}
break;
case INDEX_op_dup2_vec:
assert(TCG_TARGET_REG_BITS == 32);
if (arg_is_const(op->args[1]) && arg_is_const(op->args[2])) {
tcg_opt_gen_movi(&ctx, op, op->args[0],
deposit64(arg_info(op->args[1])->val, 32, 32,
arg_info(op->args[2])->val));
continue;
} else if (args_are_copies(op->args[1], op->args[2])) {
op->opc = INDEX_op_dup_vec;
TCGOP_VECE(op) = MO_32;
}
break;
default:
break;
@ -1796,6 +1799,12 @@ void tcg_optimize(TCGContext *s)
CASE_OP_32_64(divu):
done = fold_divide(&ctx, op);
break;
case INDEX_op_dup_vec:
done = fold_dup(&ctx, op);
break;
case INDEX_op_dup2_vec:
done = fold_dup2(&ctx, op);
break;
CASE_OP_32_64(eqv):
done = fold_eqv(&ctx, op);
break;