[PATCH 4/5] remove usage of BIGGEST_FIELD_ALIGNMENT in encoding.c

[tbsaunde+gcc at tbsaunde dot org]

From: Trevor Saunders <tbsaunde+gcc@tbsaunde.org>

Similar to ROUND_TYPE_ALIGN it seems to make sense to copy the
information in the target macros to libobjc as an incremental step.  Its
worth noting a large portion of the definitions of this macro only exist
to work around ADJUST_FIELD_ALIGN being used in target libs, so once all
target macros are gone from target libs we should be able to remove most
of the definitions of BIGGEST_FIELD_ALIGNMENT in gcc/, at which point
there won't be a significant amount of dupplication.

libobjc/ChangeLog:

2015-10-30  Trevor Saunders  <tbsaunde+gcc@tbsaunde.org>

	PR libobjc/24775
	* encoding.c (objc_layout_structure_next_member): Remove usage
	of BIGGEST_FIELD_ALIGNMENT.
---
 libobjc/encoding.c | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/libobjc/encoding.c b/libobjc/encoding.c
index 867372d..7438d64 100644
--- a/libobjc/encoding.c
+++ b/libobjc/encoding.c
@@ -1158,8 +1158,18 @@ objc_layout_structure_next_member (struct objc_struct_layout *layout)
     }
 
   /* The following won't work for vectors.  */
-#ifdef BIGGEST_FIELD_ALIGNMENT
-  desired_align = MIN (desired_align, BIGGEST_FIELD_ALIGNMENT);
+#if defined __x86_64__ || defined __i386__
+#if defined __CYGWIN__ || defined __MINGW32__
+  desired_align = MIN (desired_align, 64);
+#elif defined __x86_64__
+  desired_align = MIN (desired_align, 128);
+#else
+  desired_align = MIN (desired_align, 32);
+#endif
+#elif defined __tilepro__ || defined __frv__ || defined __arm__
+  desired_align = MIN (desired_align, 64);
+#elif defined __tilegx__
+  desired_align = MIN (desired_align, 128);
 #endif
 #ifdef ADJUST_FIELD_ALIGN
   desired_align = ADJUST_FIELD_ALIGN (type, desired_align);
-- 
2.6.2