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tcg/optimize: Split out finish_bb, finish_ebb

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Call them directly from the opcode switch statement in tcg_optimize,
rather than in finish_folding based on opcode flags.  Adjust folding
of conditional branches to match.

Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2024-12-08 07:45:11 -06:00
parent dbf408b667
commit 1526855c01
1 changed files with 31 additions and 16 deletions
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47
tcg/optimize.c
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@ -964,24 +964,25 @@ static void copy_propagate(OptContext *ctx, TCGOp *op,
}
}
static void finish_bb(OptContext *ctx)
{
/* We only optimize memory barriers across basic blocks. */
ctx->prev_mb = NULL;
}
static void finish_ebb(OptContext *ctx)
{
finish_bb(ctx);
/* We only optimize across extended basic blocks. */
memset(&ctx->temps_used, 0, sizeof(ctx->temps_used));
remove_mem_copy_all(ctx);
}
static void finish_folding(OptContext *ctx, TCGOp *op)
{
const TCGOpDef *def = &tcg_op_defs[op->opc];
int i, nb_oargs;
/*
* We only optimize extended basic blocks. If the opcode ends a BB
* and is not a conditional branch, reset all temp data.
*/
if (def->flags & TCG_OPF_BB_END) {
ctx->prev_mb = NULL;
if (!(def->flags & TCG_OPF_COND_BRANCH)) {
memset(&ctx->temps_used, 0, sizeof(ctx->temps_used));
remove_mem_copy_all(ctx);
}
return;
}
nb_oargs = def->nb_oargs;
for (i = 0; i < nb_oargs; i++) {
TCGTemp *ts = arg_temp(op->args[i]);
@ -1351,8 +1352,11 @@ static bool fold_brcond(OptContext *ctx, TCGOp *op)
if (i > 0) {
op->opc = INDEX_op_br;
op->args[0] = op->args[3];
finish_ebb(ctx);
} else {
finish_bb(ctx);
}
return false;
return true;
}
static bool fold_brcond2(OptContext *ctx, TCGOp *op)
@ -1443,9 +1447,12 @@ static bool fold_brcond2(OptContext *ctx, TCGOp *op)
}
op->opc = INDEX_op_br;
op->args[0] = label;
break;
finish_ebb(ctx);
return true;
}
return false;
finish_bb(ctx);
return true;
}
static bool fold_bswap(OptContext *ctx, TCGOp *op)
@ -3037,6 +3044,14 @@ void tcg_optimize(TCGContext *s)
CASE_OP_32_64_VEC(xor):
done = fold_xor(&ctx, op);
break;
case INDEX_op_set_label:
case INDEX_op_br:
case INDEX_op_exit_tb:
case INDEX_op_goto_tb:
case INDEX_op_goto_ptr:
finish_ebb(&ctx);
done = true;
break;
default:
break;
}