gcc/
	* config/arm/arm.c (arm_override_options): Override alignments if
	tuning for Cortex-A8.
	(create_fix_barrier, arm_reorg): If aligning to jumps or loops,
	make labels have a size.
	* config/arm/arm.md (VUNSPEC_ALIGN16, VUNSPEC_ALIGN32): New constants.
	(align_16, align_32): New patterns.

2010-07-26  Julian Brown  <julian@codesourcery.com>

	Merge from Sourcery G++ 4.4:
 	
 	Mark Shinwell  <shinwell@codesourcery.com>
 

=== modified file 'gcc/config/arm/arm.c'
--- old/gcc/config/arm/arm.c	2010-08-10 14:03:02 +0000
+++ new/gcc/config/arm/arm.c	2010-08-12 11:33:54 +0000
@@ -1449,6 +1449,16 @@
      chosen.  */
   gcc_assert (arm_tune != arm_none);
 
+  if (arm_tune == cortexa8 && optimize >= 3)
+    {
+      /* These alignments were experimentally determined to improve SPECint
+	 performance on SPECCPU 2000.  */
+      if (align_functions <= 0)
+	align_functions = 16;
+      if (align_jumps <= 0)
+	align_jumps = 16;
+    }
+
   tune_flags = all_cores[(int)arm_tune].flags;
 
   if (target_fp16_format_name)
@@ -11263,7 +11273,10 @@
       gcc_assert (GET_CODE (from) != BARRIER);
 
       /* Count the length of this insn.  */
-      count += get_attr_length (from);
+      if (LABEL_P (from) && (align_jumps > 0 || align_loops > 0))
+        count += MAX (align_jumps, align_loops);
+      else
+        count += get_attr_length (from);
 
       /* If there is a jump table, add its length.  */
       tmp = is_jump_table (from);
@@ -11603,6 +11616,8 @@
 	      insn = table;
 	    }
 	}
+      else if (LABEL_P (insn) && (align_jumps > 0 || align_loops > 0))
+	address += MAX (align_jumps, align_loops);
     }
 
   fix = minipool_fix_head;

=== modified file 'gcc/config/arm/arm.md'
--- old/gcc/config/arm/arm.md	2010-08-12 11:29:02 +0000
+++ new/gcc/config/arm/arm.md	2010-08-12 11:33:54 +0000
@@ -135,6 +135,8 @@
    (VUNSPEC_WCMP_EQ  12) ; Used by the iWMMXt WCMPEQ instructions
    (VUNSPEC_WCMP_GTU 13) ; Used by the iWMMXt WCMPGTU instructions
    (VUNSPEC_WCMP_GT  14) ; Used by the iwMMXT WCMPGT instructions
+   (VUNSPEC_ALIGN16  15) ; Used to force 16-byte alignment.
+   (VUNSPEC_ALIGN32  16) ; Used to force 32-byte alignment.
    (VUNSPEC_EH_RETURN 20); Use to override the return address for exception
 			 ; handling.
   ]
@@ -11042,6 +11044,24 @@
   "
 )
 
+(define_insn "align_16"
+  [(unspec_volatile [(const_int 0)] VUNSPEC_ALIGN16)]
+  "TARGET_EITHER"
+  "*
+  assemble_align (128);
+  return \"\";
+  "
+)
+
+(define_insn "align_32"
+  [(unspec_volatile [(const_int 0)] VUNSPEC_ALIGN32)]
+  "TARGET_EITHER"
+  "*
+  assemble_align (256);
+  return \"\";
+  "
+)
+
 (define_insn "consttable_end"
   [(unspec_volatile [(const_int 0)] VUNSPEC_POOL_END)]
   "TARGET_EITHER"