ChangeLog:

	* target.def (vector_alignment): New target hook.
	* doc/tm.texi.in (TARGET_VECTOR_ALIGNMENT): Document new hook.
	* doc/tm.texi: Regenerate.
	* targhooks.c (default_vector_alignment): New function.
	* targhooks.h (default_vector_alignment): Add prototype.
	* stor-layout.c (layout_type): Use targetm.vector_alignment.
	* config/arm/arm.c (arm_vector_alignment): New function.
	(TARGET_VECTOR_ALIGNMENT): Define.

	* tree-vect-data-refs.c (vect_update_misalignment_for_peel): Use
	vector type alignment instead of size.
	* tree-vect-loop-manip.c (vect_do_peeling_for_loop_bound): Use
	element type size directly instead of computing it from alignment.
	Fix variable naming and comment.

testsuite/ChangeLog:

	* lib/target-supports.exp
	(check_effective_target_vect_natural_alignment): New function.
	* gcc.dg/align-2.c: Only run on targets with natural alignment
	of vector types.
	* gcc.dg/vect/slp-25.c: Adjust tests for targets without natural
	alignment of vector types.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@189974 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 10 insertions, 0 deletions

diff --git a/gcc/target.def b/gcc/target.def
index bdbf68e7c53..5ac6d48681b 100644
--- a/gcc/target.def
+++ b/gcc/target.def
@@ -1664,6 +1664,16 @@ DEFHOOK
  bool, (enum machine_mode mode),
  hook_bool_mode_false)
 
+DEFHOOK
+(vector_alignment,
+ "This hook can be used to define the alignment for a vector of type\n\
+@var{type}, in order to comply with a platform ABI.  The default is to\n\
+require natural alignment for vector types.  The alignment returned by\n\
+this hook must be a power-of-two multiple of the default alignment of\n\
+the vector element type.",
+ HOST_WIDE_INT, (const_tree type),
+ default_vector_alignment)
+
 /* True if we should try to use a scalar mode to represent an array,
    overriding the usual MAX_FIXED_MODE limit.  */
 DEFHOOK