From: Jeff Law <law@gcc.gnu.org>
Date: Wed, 25 Aug 1993 23:38:10 +0000 (-0600)
Subject: expmed.c (store_bit_field): Do not use bitfield instructions for STRICT_ALIGNMENT... 
X-Git-Tag: misc/cutover-egcs-0~8730
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=bd5d175ab8f46a3bee7f9bec19d16ad32ea63900;p=thirdparty%2Fgcc.git

expmed.c (store_bit_field): Do not use bitfield instructions for STRICT_ALIGNMENT machines if...

	* expmed.c (store_bit_field): Do not use bitfield instructions for
	STRICT_ALIGNMENT machines if the MEM's alignment isn't as big as
	the MEM's mode.

From-SVN: r5213
---

diff --git a/gcc/expmed.c b/gcc/expmed.c
index 1739e703c883..c8e2f22618ad 100644
--- a/gcc/expmed.c
+++ b/gcc/expmed.c
@@ -389,7 +389,8 @@ store_bit_field (str_rtx, bitsize, bitnum, fieldmode, value, align, total_size)
 	  else
 	    bestmode = GET_MODE (op0);
 
-	  if (bestmode == VOIDmode)
+	  if (bestmode == VOIDmode
+	      || (STRICT_ALIGNMENT && GET_MODE_SIZE (bestmode) > align))
 	    goto insv_loses;
 
 	  /* Adjust address to point to the containing unit of that mode.  */
@@ -959,7 +960,8 @@ extract_bit_field (str_rtx, bitsize, bitnum, unsignedp,
 		  else
 		    bestmode = GET_MODE (xop0);
 
-		  if (bestmode == VOIDmode)
+		  if (bestmode == VOIDmode
+		      || (STRICT_ALIGNMENT && GET_MODE_SIZE (bestmode) > align))
 		    goto extzv_loses;
 
 		  /* Compute offset as multiple of this unit,
@@ -1092,7 +1094,8 @@ extract_bit_field (str_rtx, bitsize, bitnum, unsignedp,
 		  else
 		    bestmode = GET_MODE (xop0);
 
-		  if (bestmode == VOIDmode)
+		  if (bestmode == VOIDmode
+		      || (STRICT_ALIGNMENT && GET_MODE_SIZE (bestmode) > align))
 		    goto extv_loses;
 
 		  /* Compute offset as multiple of this unit,