From: Eric Botcazou <ebotcazou@libertysurf.fr>
Date: Sat, 8 Mar 2003 07:42:41 +0000 (+0100)
Subject: re PR middle-end/7796 (sparc-sun-solaris2.7 extra failure w/-m64 on execute/930921... 
X-Git-Tag: releases/gcc-3.2.3~136
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=45e0ebde97a1910c73020d6770f65415cdce77eb;p=thirdparty%2Fgcc.git

re PR middle-end/7796 (sparc-sun-solaris2.7 extra failure w/-m64 on execute/930921-1.c in unroll.c)

	PR middle-end/7796
	* unroll.c (calculate_giv_inc): Handle constants being
	loaded with LSHIFTRT.

From-SVN: r63973
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index c76147bf7c57..ccdb5c812039 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2003-03-08  Eric Botcazou  <ebotcazou@libertysurf.fr>
+
+	PR middle-end/7796
+	* unroll.c (calculate_giv_inc): Handle constants being
+	loaded with LSHIFTRT.
+
 2003-03-07  Eric Botcazou  <ebotcazou@libertysurf.fr>
 
 	PR optimization/8726
diff --git a/gcc/unroll.c b/gcc/unroll.c
index 83327c7ba4cf..b9232274add6 100644
--- a/gcc/unroll.c
+++ b/gcc/unroll.c
@@ -1636,11 +1636,13 @@ calculate_giv_inc (pattern, src_insn, regno)
 	}
 
       else if (GET_CODE (increment) == IOR
+	       || GET_CODE (increment) == PLUS
 	       || GET_CODE (increment) == ASHIFT
-	       || GET_CODE (increment) == PLUS)
+	       || GET_CODE (increment) == LSHIFTRT)
 	{
 	  /* The rs6000 port loads some constants with IOR.
-	     The alpha port loads some constants with ASHIFT and PLUS.  */
+	     The alpha port loads some constants with ASHIFT and PLUS.
+	     The sparc64 port loads some constants with LSHIFTRT.  */
 	  rtx second_part = XEXP (increment, 1);
 	  enum rtx_code code = GET_CODE (increment);
 
@@ -1657,8 +1659,10 @@ calculate_giv_inc (pattern, src_insn, regno)
 	    increment = GEN_INT (INTVAL (increment) | INTVAL (second_part));
 	  else if (code == PLUS)
 	    increment = GEN_INT (INTVAL (increment) + INTVAL (second_part));
-	  else
+	  else if (code == ASHIFT)
 	    increment = GEN_INT (INTVAL (increment) << INTVAL (second_part));
+	  else
+	    increment = GEN_INT ((unsigned HOST_WIDE_INT) INTVAL (increment) >> INTVAL (second_part));
 	}
 
       if (GET_CODE (increment) != CONST_INT)