re PR rtl-optimization/53827 ([alpha]: Invalid insn scheduling in sched1 pass)

PR rtl-optimization/53827
PR debug/53671
PR debug/49888
* alias.c (memrefs_conflict_p): Adjust offset and size by the
same amount for alignment ANDs.

From-SVN: r189325

gcc/ChangeLog

+2012-07-06  Alexandre Oilva  <aoliva@redhat.com>
+
+	PR rtl-optimization/53827
+	PR debug/53671
+	PR debug/49888
+	* alias.c (memrefs_conflict_p): Adjust offset and size by the
+	same amount for alignment ANDs.
+
 2012-07-06  Tom de Vries  <tom@codesourcery.com>
 
 	PR tree-optimization/51879

gcc/alias.c

@@ -2107,7 +2107,7 @@ memrefs_conflict_p (int xsize, rtx x, int ysize, rtx y, HOST_WIDE_INT c)
       if (xsize > 0 && sc < 0 && -uc == (uc & -uc))
 	{
 	  xsize -= sc + 1;
-	  c -= sc;
+	  c -= sc + 1;
 	  return memrefs_conflict_p (xsize, canon_rtx (XEXP (x, 0)),
 				     ysize, y, c);
 	}
@@ -2119,7 +2119,7 @@ memrefs_conflict_p (int xsize, rtx x, int ysize, rtx y, HOST_WIDE_INT c)
       if (ysize > 0 && sc < 0 && -uc == (uc & -uc))
 	{
 	  ysize -= sc + 1;
-	  c += sc;
+	  c += sc + 1;
 	  return memrefs_conflict_p (xsize, x,
 				     ysize, canon_rtx (XEXP (y, 0)), c);
 	}