From 61c964c7fd2ad96cec262a2bcd1fc13bd2e2eff8 Mon Sep 17 00:00:00 2001
From: Hans-Peter Nilsson <hp@axis.com>
Date: Fri, 31 Jan 2020 08:24:43 +0100
Subject: [PATCH] cris: Enable extend operations to SImode to set condition
 codes.

Enable dropping of compares with zero of the result, through the
three CCmode substitutions and the cmpelim pass.

gcc:
	* config/cris/cris.md
	("<acc><anz><anzvc>extend<mode>si2<setcc><setnz><setnzvc>"):
	Rename from "extend<mode>si2".
	("<acc><anz><anzvc>zero_extend<mode>si2<setcc><setnz><setnzvc>"):
	Similar, from "zero_extend<mode>si2".
---
 gcc/ChangeLog           | 4 ++++
 gcc/config/cris/cris.md | 4 ++--
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 22178ad52ce..f0800fe1b19 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -120,6 +120,10 @@
 	("*b<zcond:code><mode>"): Rename from "b<zcond:code><mode>".
 	("*b<nzvccond:code><mode>"): Rename from "b<nzvccond:code><mode>".
 	("*b<rnzcond:code><mode>"): Rename from "*b<rnzcond:code><mode>".
+	("<acc><anz><anzvc>extend<mode>si2<setcc><setnz><setnzvc>"):
+	Rename from "extend<mode>si2".
+	("<acc><anz><anzvc>zero_extend<mode>si2<setcc><setnz><setnzvc>"):
+	Similar, from "zero_extend<mode>si2".
 
 2020-05-08  Vladimir Makarov  <vmakarov@redhat.com>
 
diff --git a/gcc/config/cris/cris.md b/gcc/config/cris/cris.md
index 5f77bc9e0fd..2f3f328f5c5 100644
--- a/gcc/config/cris/cris.md
+++ b/gcc/config/cris/cris.md
@@ -856,7 +856,7 @@
   ""
   "movs<m> %1,%M0\;smi %H0\;neg.d %H0,%H0")
 
-(define_insn "extend<mode>si2"
+(define_insn "<acc><anz><anzvc>extend<mode>si2<setcc><setnz><setnzvc>"
   [(set (match_operand:SI 0 "register_operand" "=r,r,r")
 	(sign_extend:SI (match_operand:BW 1 "general_operand" "r,Q>,g")))
    (clobber (reg:CC CRIS_CC0_REGNUM))]
@@ -879,7 +879,7 @@
 ;; Zero-extend.  The DImode ones are synthesized by gcc, so we don't
 ;; specify them here.
 
-(define_insn "zero_extend<mode>si2"
+(define_insn "<acc><anz><anzvc>zero_extend<mode>si2<setcc><setnz><setnzvc>"
   [(set (match_operand:SI 0 "register_operand" "=r,r,r")
 	(zero_extend:SI
 	 (match_operand:BW 1 "nonimmediate_operand" "r,Q>,m")))
-- 
2.30.2