local-alloc.c (local_alloc): Avoid call of update_equiv_regs when not optimizing.

	* local-alloc.c (local_alloc): Avoid call of update_equiv_regs when not optimizing.

	* toplev.c (rest_of_compilation): Cann mark_constant_function
	only when optimizing.

	* flow.c (calculate_global_regs_live): Ensure that all AUX fields are NULL.

	* cfgcleanup.c (bb_flags): Add BB_NONTHREADABLE_BLOCK.
	(thread_jump): Set BB_NONTHREADABLE_BLOCK, check it.
	(try_optimize_cfg): clear all AUX fields.

	* i386.c (aligned_operand): Be prepared for SUBREGed registers.
	(ix86_decompose_address): Use REG_P instead of GET_CODE (...) == REG.
	(ix86_address_cost): Be prepared for SUBREGed registers.
	(legitimate_address_p): Accept SUBREGed registers.

From-SVN: r51604

1 files changed, 10 insertions, 0 deletions

diff --git a/gcc/flow.c b/gcc/flow.c
index 61008e6..332d543 100644
--- a/gcc/flow.c
+++ b/gcc/flow.c
@@ -1071,6 +1071,16 @@ calculate_global_regs_live (blocks_in, blocks_out, flags)
   regset_head new_live_at_end_head;
   int i;
 
+  /* Some passes used to forget clear aux field of basic block causing
+     sick behaviour here.  */
+#ifdef ENABLE_CHECKING
+  if (ENTRY_BLOCK_PTR->aux || EXIT_BLOCK_PTR->aux)
+    abort ();
+  for (i = 0; i < n_basic_blocks; i++)
+    if (BASIC_BLOCK (i)->aux)
+      abort ();
+#endif
+
   tmp = INITIALIZE_REG_SET (tmp_head);
   new_live_at_end = INITIALIZE_REG_SET (new_live_at_end_head);
   call_used = INITIALIZE_REG_SET (call_used_head);