re PR target/18916 (mis-aligned vector code with copy memory (-maltivec))

	PR target/18916
	* builtins.c (std_gimplify_va_arg_expr): Adjust alignment of *ap.
	* expr.h (struct locate_and_pad_arg_data): Add "boundary".
	* function.c (locate_and_pad_parm): Set new field.
	(assign_parm_find_stack_rtl): Use it instead of FUNCTION_ARG_BOUNDARY.
	Tweak where_pad test to include "none".  Always set mem align for
	stack_parm.
	(assign_parm_adjust_stack_rtl): Discard stack_parm if alignment
	not sufficient for type.
	(assign_parm_setup_block): If stack_parm is zero on entry, always
	make a new stack local.  Block move old stack parm if necessary
	to new aligned stack local.
	(assign_parm_setup_stack): Use a block move to handle
	potentially misaligned entry_parm.
	(assign_parms_unsplit_complex): Specify required alignment when
	creating stack local.
	* calls.c (compute_argument_addresses): Override alignment of stack
	arg calculated from its type with the alignment given by
	FUNCTION_ARG_BOUNDARY.
	(store_one_arg): Likewise.

From-SVN: r93179

1 files changed, 4 insertions, 1 deletions

diff --git a/gcc/expr.h b/gcc/expr.h
index 3e6571c..a7eb1e3 100644
--- a/gcc/expr.h
+++ b/gcc/expr.h
@@ -1,6 +1,7 @@
 /* Definitions for code generation pass of GNU compiler.
    Copyright (C) 1987, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
-   1999, 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
+   1999, 2000, 2001, 2002, 2003, 2004, 2005
+   Free Software Foundation, Inc.
 
 This file is part of GCC.
 
@@ -116,6 +117,8 @@ struct locate_and_pad_arg_data
   struct args_size alignment_pad;
   /* Which way we should pad this arg.  */
   enum direction where_pad;
+  /* slot_offset is at least this aligned.  */
+  unsigned int boundary;
 };
 
 /* Add the value of the tree INC to the `struct args_size' TO.  */