From 2240ebd8e46e098f972a662d0aad85348b304889 Mon Sep 17 00:00:00 2001 From: Robin Dapp Date: Mon, 7 Feb 2022 08:39:41 +0100 Subject: [PATCH] arc: Fix for new ifcvt behavior [PR104154] ifcvt now passes a CC-mode "comparison" to backends. This patch simply returns from gen_compare_reg () in that case since nothing needs to be prepared anymore. gcc/ChangeLog: PR rtl-optimization/104154 * config/arc/arc.cc (gen_compare_reg): Return the CC-mode comparison ifcvt passed us. --- gcc/config/arc/arc.cc | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/gcc/config/arc/arc.cc b/gcc/config/arc/arc.cc index c27ba99..fbc17e6 100644 --- a/gcc/config/arc/arc.cc +++ b/gcc/config/arc/arc.cc @@ -2256,6 +2256,12 @@ gen_compare_reg (rtx comparison, machine_mode omode) cmode = GET_MODE (x); if (cmode == VOIDmode) cmode = GET_MODE (y); + + /* If ifcvt passed us a MODE_CC comparison we can + just return it. It should be in the proper form already. */ + if (GET_MODE_CLASS (cmode) == MODE_CC) + return comparison; + if (cmode != SImode && cmode != SFmode && cmode != DFmode) return NULL_RTX; if (cmode == SImode) -- 2.7.4