From b0896c3319f63b9000b3c0dfae800f18104414bd Mon Sep 17 00:00:00 2001
From: Wei Mi <wmi@google.com>
Date: Tue, 2 Apr 2013 16:54:39 +0000
Subject: [PATCH] i386.c (ix86_rtx_costs): Set proper rtx cost for
 ashl<mode>3_mask...

2013-04-02  Wei Mi  <wmi@google.com>

	* config/i386/i386.c (ix86_rtx_costs): Set proper rtx cost for
	ashl<mode>3_mask, *<shift_insn><mode>3_mask and
	*<rotate_insn><mode>3_mask in i386.md.

From-SVN: r197364
---
 gcc/ChangeLog          | 6 ++++++
 gcc/config/i386/i386.c | 7 +++++++
 2 files changed, 13 insertions(+)

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 25743df9f2bd..b39a0f4d3e5b 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2013-04-02  Wei Mi  <wmi@google.com>
+
+	* config/i386/i386.c (ix86_rtx_costs): Set proper rtx cost for
+	ashl<mode>3_mask, *<shift_insn><mode>3_mask and
+	*<rotate_insn><mode>3_mask in i386.md.
+
 2013-04-02  Richard Biener  <rguenther@suse.de>
 
 	PR middle-end/56768
diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index 7a441c732374..440bd82dd0e0 100644
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -31622,6 +31622,13 @@ ix86_rtx_costs (rtx x, int code, int outer_code_i, int opno, int *total,
 	{
 	  if (CONST_INT_P (XEXP (x, 1)))
 	    *total = cost->shift_const;
+	  else if (GET_CODE (XEXP (x, 1)) == SUBREG
+		   && GET_CODE (XEXP (XEXP (x, 1), 0)) == AND)
+	    {
+	      /* Return the cost after shift-and truncation.  */
+	      *total = cost->shift_var;
+	      return true;
+	    }
 	  else
 	    *total = cost->shift_var;
 	}
-- 
2.47.2