From d97f8f394184403beb655f5f077bef8ef83ffa3a Mon Sep 17 00:00:00 2001 From: Richard Henderson Date: Mon, 16 Oct 2023 19:10:42 -0700 Subject: [PATCH] tcg: Optimize past conditional branches We already register allocate through extended basic blocks, optimize through extended basic blocks as well. Signed-off-by: Richard Henderson --- tcg/optimize.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/tcg/optimize.c b/tcg/optimize.c index 3013eb04e6..2db5177c32 100644 --- a/tcg/optimize.c +++ b/tcg/optimize.c @@ -688,12 +688,14 @@ static void finish_folding(OptContext *ctx, TCGOp *op) int i, nb_oargs; /* - * For an opcode that ends a BB, reset all temp data. - * We do no cross-BB optimization. + * 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) { - memset(&ctx->temps_used, 0, sizeof(ctx->temps_used)); ctx->prev_mb = NULL; + if (!(def->flags & TCG_OPF_COND_BRANCH)) { + memset(&ctx->temps_used, 0, sizeof(ctx->temps_used)); + } return; }