From db7ccee202ecc15386eb283a83f75530f7ed856a Mon Sep 17 00:00:00 2001
From: Georg-Johann Lay <avr@gjlay.de>
Date: Fri, 29 Jul 2011 11:27:39 +0000
Subject: [PATCH] re PR target/49687 ([avr] Missed optimization for widening
 MUL)

	PR target/49687
	* config/avr/avr.md (mulsi3, *mulsi3, mulu<mode>si3,
	muls<mode>si3, mulohisi3, mulhisi3, umulhisi3, usmulhisi3,
	*<any_extend:extend_prefix><any_extend2:extend_prefix>mul<QIHI:mode><QIHI2:mode>si3):
	Add X to register footprint: Clobber r26/r27.

From-SVN: r176923
---
 gcc/ChangeLog         | 8 ++++++++
 gcc/config/avr/avr.md | 9 +++++++++
 2 files changed, 17 insertions(+)

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index fad87a05171..d3e0ac78a8e 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,11 @@
+2011-07-29  Georg-Johann Lay  <avr@gjlay.de>
+	
+	PR target/49687
+	* config/avr/avr.md (mulsi3, *mulsi3, mulu<mode>si3,
+	muls<mode>si3, mulohisi3, mulhisi3, umulhisi3, usmulhisi3,
+	*<any_extend:extend_prefix><any_extend2:extend_prefix>mul<QIHI:mode><QIHI2:mode>si3):
+	Add X to register footprint: Clobber r26/r27.
+
 2011-07-29  Richard Guenther  <rguenther@suse.de>
 
 	* builtins.c (fold_builtin_signbit): Build the comparison
diff --git a/gcc/config/avr/avr.md b/gcc/config/avr/avr.md
index 2c215fdecc5..55a883e9ab3 100644
--- a/gcc/config/avr/avr.md
+++ b/gcc/config/avr/avr.md
@@ -1373,6 +1373,7 @@
   [(parallel [(set (match_operand:SI 0 "register_operand" "")
                    (mult:SI (match_operand:SI 1 "register_operand" "")
                             (match_operand:SI 2 "nonmemory_operand" "")))
+              (clobber (reg:HI 26))
               (clobber (reg:DI 18))])]
   "AVR_HAVE_MUL"
   {
@@ -1395,6 +1396,7 @@
   [(set (match_operand:SI 0 "pseudo_register_operand"                      "=r")
         (mult:SI (match_operand:SI 1 "pseudo_register_operand"              "r")
                  (match_operand:SI 2 "pseudo_register_or_const_int_operand" "rn")))
+   (clobber (reg:HI 26))
    (clobber (reg:DI 18))]
   "AVR_HAVE_MUL && !reload_completed"
   { gcc_unreachable(); }
@@ -1431,6 +1433,7 @@
   [(set (match_operand:SI 0 "pseudo_register_operand"                           "=r")
         (mult:SI (zero_extend:SI (match_operand:QIHI 1 "pseudo_register_operand" "r"))
                  (match_operand:SI 2 "pseudo_register_or_const_int_operand"      "rn")))
+   (clobber (reg:HI 26))
    (clobber (reg:DI 18))]
   "AVR_HAVE_MUL && !reload_completed"
   { gcc_unreachable(); }
@@ -1466,6 +1469,7 @@
   [(set (match_operand:SI 0 "pseudo_register_operand"                           "=r")
         (mult:SI (sign_extend:SI (match_operand:QIHI 1 "pseudo_register_operand" "r"))
                  (match_operand:SI 2 "pseudo_register_or_const_int_operand"      "rn")))
+   (clobber (reg:HI 26))
    (clobber (reg:DI 18))]
   "AVR_HAVE_MUL && !reload_completed"
   { gcc_unreachable(); }
@@ -1509,6 +1513,7 @@
         (mult:SI (not:SI (zero_extend:SI 
                           (not:HI (match_operand:HI 1 "pseudo_register_operand" "r"))))
                  (match_operand:SI 2 "pseudo_register_or_const_int_operand"     "rn")))
+   (clobber (reg:HI 26))
    (clobber (reg:DI 18))]
   "AVR_HAVE_MUL && !reload_completed"
   { gcc_unreachable(); }
@@ -1528,6 +1533,7 @@
   [(parallel [(set (match_operand:SI 0 "register_operand" "")
                    (mult:SI (sign_extend:SI (match_operand:HI 1 "register_operand" ""))
                             (sign_extend:SI (match_operand:HI 2 "register_operand" ""))))
+              (clobber (reg:HI 26))
               (clobber (reg:DI 18))])]
   "AVR_HAVE_MUL"
   "")
@@ -1536,6 +1542,7 @@
   [(parallel [(set (match_operand:SI 0 "register_operand" "")
                    (mult:SI (zero_extend:SI (match_operand:HI 1 "register_operand" ""))
                             (zero_extend:SI (match_operand:HI 2 "register_operand" ""))))
+              (clobber (reg:HI 26))
               (clobber (reg:DI 18))])]
   "AVR_HAVE_MUL"
   "")
@@ -1544,6 +1551,7 @@
   [(parallel [(set (match_operand:SI 0 "register_operand" "")
                    (mult:SI (zero_extend:SI (match_operand:HI 1 "register_operand" ""))
                             (sign_extend:SI (match_operand:HI 2 "register_operand" ""))))
+              (clobber (reg:HI 26))
               (clobber (reg:DI 18))])]
   "AVR_HAVE_MUL"
   "")
@@ -1557,6 +1565,7 @@
   [(set (match_operand:SI 0 "pseudo_register_operand"                            "=r")
         (mult:SI (any_extend:SI (match_operand:QIHI 1 "pseudo_register_operand"   "r"))
                  (any_extend2:SI (match_operand:QIHI2 2 "pseudo_register_operand" "r"))))
+   (clobber (reg:HI 26))
    (clobber (reg:DI 18))]
   "AVR_HAVE_MUL && !reload_completed"
   { gcc_unreachable(); }
-- 
2.30.2