From 475904f710ccb99653d1f5c1cf426eaa3aa1626c Mon Sep 17 00:00:00 2001
From: Roger Sayle <roger@nextmovesoftware.com>
Date: Wed, 10 May 2023 22:10:49 +0100
Subject: [PATCH] Use [(const_int 0)] idiom consistently in i386.md

This cleans up the use of [(clobber (const_int 0))] in the i386 backend.

2023-05-10  Roger Sayle  <roger@nextmovesoftware.com>

gcc/ChangeLog
	* config/i386/i386.md (*concat<mode><dwi>3_1): Use preferred
	[(const_int 0)] idiom, instead of [(clobber (const_int 0))].
	(*concat<mode><dwi>3_2): Likewise.
	(*concat<mode><dwi>3_3): Likewise.
	(*concat<mode><dwi>3_4): Likewise.
	(*concat<mode><dwi>3_5): Likewise.
	(*concat<mode><dwi>3_6): Likewise.
	(*concat<mode><dwi>3_7): Likewise.
---
 gcc/config/i386/i386.md | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md
index 5a064f306eb..e6ebc461e52 100644
--- a/gcc/config/i386/i386.md
+++ b/gcc/config/i386/i386.md
@@ -11609,7 +11609,7 @@
   "INTVAL (operands[2]) == <MODE_SIZE> * BITS_PER_UNIT"
   "#"
   "&& reload_completed"
-  [(clobber (const_int 0))]
+  [(const_int 0)]
 {
   split_double_concat (<DWI>mode, operands[0], operands[3],
 		       gen_lowpart (<MODE>mode, operands[1]));
@@ -11626,7 +11626,7 @@
   "INTVAL (operands[3]) == <MODE_SIZE> * BITS_PER_UNIT"
   "#"
   "&& reload_completed"
-  [(clobber (const_int 0))]
+  [(const_int 0)]
 {
   split_double_concat (<DWI>mode, operands[0], operands[1],
 		       gen_lowpart (<MODE>mode, operands[2]));
@@ -11645,7 +11645,7 @@
   "INTVAL (operands[2]) == <MODE_SIZE> * BITS_PER_UNIT"
   "#"
   "&& reload_completed"
-  [(clobber (const_int 0))]
+  [(const_int 0)]
 {
   split_double_concat (<DWI>mode, operands[0], operands[3], operands[1]);
   DONE;
@@ -11663,7 +11663,7 @@
   "INTVAL (operands[3]) == <MODE_SIZE> * BITS_PER_UNIT"
   "#"
   "&& reload_completed"
-  [(clobber (const_int 0))]
+  [(const_int 0)]
 {
   split_double_concat (<DWI>mode, operands[0], operands[1], operands[2]);
   DONE;
@@ -11690,7 +11690,7 @@
 					VOIDmode))"
   "#"
   "&& reload_completed"
-  [(clobber (const_int 0))]
+  [(const_int 0)]
 {
   rtx op3 = simplify_subreg (<HALF>mode, operands[3], <MODE>mode, 0);
   split_double_concat (<MODE>mode, operands[0], op3,
@@ -11722,7 +11722,7 @@
 					VOIDmode))"
   "#"
   "&& reload_completed"
-  [(clobber (const_int 0))]
+  [(const_int 0)]
 {
   rtx op3 = simplify_subreg (<MODE>mode, operands[3], <DWI>mode, 0);
   split_double_concat (<DWI>mode, operands[0], op3, operands[1]);
@@ -11748,7 +11748,7 @@
 				       VOIDmode)"
   "#"
   "&& reload_completed"
-  [(clobber (const_int 0))]
+  [(const_int 0)]
 {
   rtx op2;
   if (<DWI>mode == DImode)