PR debug/38367

	* function.c (assign_parm_find_stack_rtl): If promoted_mode
	is wider than DECL_MODE, adjust MEM_OFFSET (stack_parm) for
	big endian.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@142481 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 3882383..0f47e6a 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,10 @@
 2008-12-05  Jakub Jelinek  <jakub@redhat.com>
 
+       PR debug/38367
+       * function.c (assign_parm_find_stack_rtl): If promoted_mode
+       is wider than DECL_MODE, adjust MEM_OFFSET (stack_parm) for
+       big endian.
+
        PR middle-end/38338
        * builtins.c (expand_builtin_apply_args): Put before parm_birth_insn
        only if internal_arg_pointer is a non-virtual pseudo.

diff --git a/gcc/function.c b/gcc/function.c
index 8320790..0320871 100644 (file)
--- a/gcc/function.c
+++ b/gcc/function.c
@@ -2336,7 +2336,17 @@ assign_parm_find_stack_rtl (tree parm, struct assign_parm_data_one *data)
      while promoted mode's size is needed.  */
   if (data->promoted_mode != BLKmode
       && data->promoted_mode != DECL_MODE (parm))
-    set_mem_size (stack_parm, GEN_INT (GET_MODE_SIZE (data->promoted_mode)));
+    {
+      set_mem_size (stack_parm, GEN_INT (GET_MODE_SIZE (data->promoted_mode)));
+      if (MEM_EXPR (stack_parm) && MEM_OFFSET (stack_parm))
+       {
+         int offset = subreg_lowpart_offset (DECL_MODE (parm),
+                                             data->promoted_mode);
+         if (offset)
+           set_mem_offset (stack_parm,
+                           plus_constant (MEM_OFFSET (stack_parm), -offset));
+       }
+    }
 
   boundary = data->locate.boundary;
   align = BITS_PER_UNIT;