(assign_stack_temp): Compute size of slot after

assign_stack_local has accounted for alignment.

From-SVN: r8438

diff --git a/gcc/function.c b/gcc/function.c
index 844af836f6350e45d0a2f03478adc2a1b29aa415..1a206a9b4cf239c74e31d95f4cc4b6ddaa2b11ea 100644 (file)
--- a/gcc/function.c
+++ b/gcc/function.c
@@ -856,11 +856,21 @@ assign_stack_temp (mode, size, keep)
   /* If we still didn't find one, make a new temporary.  */
   if (p == 0)
     {
+      int frame_offset_old = frame_offset;
       p = (struct temp_slot *) oballoc (sizeof (struct temp_slot));
-      p->size = size;
       /* If the temp slot mode doesn't indicate the alignment,
         use the largest possible, so no one will be disappointed.  */
       p->slot = assign_stack_local (mode, size, mode == BLKmode ? -1 : 0);
+      /* The following slot size computation is necessary because we don't
+        know the actual size of the temporary slot until assign_stack_local
+        has performed all the frame alignment and size rounding for the
+        requested temporary.  Otherwise combine_temp_slots won't think that
+        adjacent slots really are adjacent.  */
+#ifdef FRAME_GROWS_DOWNWARD
+      p->size = frame_offset_old - frame_offset;
+#else
+      p->size = frame_offset - frame_offset_old;
+#endif
       p->address = 0;
       p->next = temp_slots;
       temp_slots = p;