From: liuhongt <hongtao.liu@intel.com>
Date: Wed, 8 Feb 2023 03:03:14 +0000 (+0800)
Subject: Adjust memory_move_cost for MASK_REGS when MODE_SIZE > 8.
X-Git-Tag: basepoints/gcc-14~254
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5de5e977aa0b653e9c4982db5da5e3e428840a22;p=thirdparty%2Fgcc.git

Adjust memory_move_cost for MASK_REGS when MODE_SIZE > 8.

It's impossible to put modes whose size > 8 into MASK_REGS.

gcc/ChangeLog:

	* config/i386/i386.cc (inline_memory_move_cost): Return 100
	for MASK_REGS when MODE_SIZE > 8.
---

diff --git a/gcc/config/i386/i386.cc b/gcc/config/i386/i386.cc
index 2cc8e9548a95..2581b800a061 100644
--- a/gcc/config/i386/i386.cc
+++ b/gcc/config/i386/i386.cc
@@ -19847,9 +19847,12 @@ inline_memory_move_cost (machine_mode mode, enum reg_class regclass, int in)
 	  index = 1;
 	  break;
 	/* DImode loads and stores assumed to cost the same as SImode.  */
-	default:
+	case 4:
+	case 8:
 	  index = 2;
 	  break;
+	default:
+	  return 100;
 	}
 
       if (in == 2)