From: Richard Henderson <rth@redhat.com>
Date: Thu, 25 Jul 2002 17:33:43 +0000 (-0700)
Subject: emit-rtl.c (set_mem_attributes): Fix size and alignment thinkos in ARRAY_REF of DECL_... 
X-Git-Tag: releases/gcc-3.3.0~3636
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=40cb04f19b3d49770cd90927700c493adaff58b8;p=thirdparty%2Fgcc.git

emit-rtl.c (set_mem_attributes): Fix size and alignment thinkos in ARRAY_REF of DECL_P case.

        * emit-rtl.c (set_mem_attributes): Fix size and alignment thinkos
        in ARRAY_REF of DECL_P case.

From-SVN: r55752
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index ad40abd9b0bd..ef6b358992ff 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2002-07-25  Richard Henderson  <rth@redhat.com>
+
+	* emit-rtl.c (set_mem_attributes): Fix size and alignment thinkos
+	in ARRAY_REF of DECL_P case.
+
 2002-07-25  Richard Sandiford  <rsandifo@redhat.com>
 
 	* doc/invoke.texi: Document -mabi=meabi, and expand on the EABI
diff --git a/gcc/emit-rtl.c b/gcc/emit-rtl.c
index ab73f00c6bbd..67c4cfbcd039 100644
--- a/gcc/emit-rtl.c
+++ b/gcc/emit-rtl.c
@@ -1808,12 +1808,16 @@ set_mem_attributes (ref, t, objectp)
 	  if (DECL_P (t))
 	    {
 	      expr = t;
+	      offset = NULL;
 	      if (host_integerp (off_tree, 1))
-		offset = GEN_INT (tree_low_cst (off_tree, 1));
-	      size = (DECL_SIZE_UNIT (t)
-		      && host_integerp (DECL_SIZE_UNIT (t), 1)
-		      ? GEN_INT (tree_low_cst (DECL_SIZE_UNIT (t), 1)) : 0);
-	      align = DECL_ALIGN (t);
+		{
+		  HOST_WIDE_INT ioff = tree_low_cst (off_tree, 1);
+		  HOST_WIDE_INT aoff = (ioff & -ioff) * BITS_PER_UNIT;
+		  align = DECL_ALIGN (t);
+		  if (aoff && aoff < align)
+	            align = aoff;
+		  offset = GEN_INT (ioff);
+		}
 	    }
 	  else if (TREE_CODE (t) == COMPONENT_REF)
 	    {