basic-block.h (fixup_abnormal_edges): Declare.

	* basic-block.h (fixup_abnormal_edges): Declare.
	* reload1.c (fixup_abnormal_edges): New function.
	* reg-stack.c (convert_regs): Use it.

	* gcse.c (insert_insn_end_bb): Handle trapping insns.

	* gcse.c (hash_scan_set): Refuse instructions with EH edges.

From-SVN: r50405

gcc/ChangeLog

+Thu Mar  7 16:33:54 CET 2002  Jan Hubicka  <jh@suse.cz>
+
+	* basic-block.h (fixup_abnormal_edges): Declare.
+	* reload1.c (fixup_abnormal_edges): New function.
+	* reg-stack.c (convert_regs): Use it.
+
+	* gcse.c (insert_insn_end_bb): Handle trapping insns.
+
+	* gcse.c (hash_scan_set): Refuse instructions with EH edges.
+
 2002-03-07  Richard Sandiford  <rsandifo@redhat.com>
 
 	* defaults.h (MODE_HAS_NANS, MODE_HAS_INFINITIES): New.

gcc/basic-block.h

@@ -697,6 +697,7 @@ extern conflict_graph conflict_graph_compute
 						 partition));
 extern bool mark_dfs_back_edges		PARAMS ((void));
 extern void update_br_prob_note		PARAMS ((basic_block));
+extern void fixup_abnormal_edges	PARAMS ((void));
 
 /* In dominance.c */
 

gcc/gcse.c

@@ -2189,6 +2189,10 @@ hash_scan_set (pat, insn, set_p)
 	  && regno >= FIRST_PSEUDO_REGISTER
 	  /* Don't GCSE something if we can't do a reg/reg copy.  */
 	  && can_copy_p [GET_MODE (dest)]
+	  /* GCSE commonly inserts instruction after the insn.  We can't
+	     do that easily for EH_REGION notes so disable GCSE on these
+	     for now.  */
+	  && !find_reg_note (insn, REG_EH_REGION, NULL_RTX)
 	  /* Is SET_SRC something we want to gcse?  */
 	  && want_to_gcse_p (src)
 	  /* Don't CSE a nop.  */
@@ -4609,13 +4613,23 @@ insert_insn_end_bb (expr, bb, pre)
   pat = process_insert_insn (expr);
 
   /* If the last insn is a jump, insert EXPR in front [taking care to
-     handle cc0, etc. properly].  */
+     handle cc0, etc. properly].  Similary we need to care trapping
+     instructions in presence of non-call exceptions.  */
 
-  if (GET_CODE (insn) == JUMP_INSN)
+  if (GET_CODE (insn) == JUMP_INSN
+      || (GET_CODE (insn) == INSN
+	  && (bb->succ->succ_next || (bb->succ->flags & EDGE_ABNORMAL))))
     {
 #ifdef HAVE_cc0
       rtx note;
 #endif
+      /* It should always be the case that we can put these instructions
+	 anywhere in the basic block with performing PRE optimizations.
+	 Check this.  */
+      if (GET_CODE (insn) == insn && pre
+	  && !TEST_BIT (antloc[bb->index], expr->bitmap_index)
+          && !TEST_BIT (transp[bb->index], expr->bitmap_index))
+	abort ();
 
       /* If this is a jump table, then we can't insert stuff here.  Since
 	 we know the previous real insn must be the tablejump, we insert
@@ -4645,7 +4659,8 @@ insert_insn_end_bb (expr, bb, pre)
 
   /* Likewise if the last insn is a call, as will happen in the presence
      of exception handling.  */
-  else if (GET_CODE (insn) == CALL_INSN)
+  else if (GET_CODE (insn) == CALL_INSN
+	   && (bb->succ->succ_next || (bb->succ->flags & EDGE_ABNORMAL)))
     {
       /* Keeping in mind SMALL_REGISTER_CLASSES and parameters in registers,
 	 we search backward and place the instructions before the first

gcc/reg-stack.c

@@ -2854,6 +2854,7 @@ convert_regs (file)
 	}
     }
 
+  fixup_abnormal_edges ();
   if (inserted)
     commit_edge_insertions ();
 

gcc/reload1.c

@@ -459,7 +459,7 @@ static void failed_reload		PARAMS ((rtx, int));
 static int set_reload_reg		PARAMS ((int, int));
 static void reload_cse_delete_noop_set	PARAMS ((rtx, rtx));
 static void reload_cse_simplify		PARAMS ((rtx));
-static void fixup_abnormal_edges	PARAMS ((void));
+void fixup_abnormal_edges		PARAMS ((void));
 extern void dump_needs			PARAMS ((struct insn_chain *));
 
 /* Initialize the reload pass once per compilation.  */
@@ -9465,7 +9465,7 @@ copy_eh_notes (insn, x)
    proper call and fix the damage.
  
    Similar handle instructions throwing exceptions internally.  */
-static void
+void
 fixup_abnormal_edges ()
 {
   int i;