Changes in include:

	* partition.h: New file.

Changes in libiberty:

	* Makefile.in (CFILES): Add partition.c.
	(REQUIRED_OFILES): Add partition.o.
	(partition.o): New rule.
	* partition.c: New file.

Changes in gcc:

	* Makefile.in (ssa.o): New rule.
	(OBJS): Add ssa.o.
	(STAGESTUFF): Add *.ssa and *.ussa.
	(mostlyclean): Delete *.ssa, *.ussa, */*.ssa, */*.ussa.
	* rtl.def (PHI): New RTL expression.
	* rtl.h (clear_log_links): New declaration.
	(convert_to_ssa): Likewise.
	(convert_from_ssa): Likewise.
	* flow.c (split_edge): If the entry node falls through to the
	split edge's source block, split the entry edge.
	(clear_log_links): New function.
	* toplev.c (ssa_dump): New variable.
	(flag_ssa): Likewise.
	(f_options): Add "ssa".
	(compile_file): Create SSA dump files.
	(rest_of_compilation): Go to and from SSA if enabled.
	(decide_d_option): Handle -de for SSA dump files.
	* ssa.c: New file.

From-SVN: r32465

1 files changed, 14 insertions, 2 deletions

diff --git a/gcc/flow.c b/gcc/flow.c
index 5704835..799114e 100644
--- a/gcc/flow.c
+++ b/gcc/flow.c
@@ -362,6 +362,7 @@ static void fixup_reorder_chain		PARAMS ((void));
    it being unused. */
 void verify_flow_info			PARAMS ((void));
 int flow_loop_outside_edge_p		PARAMS ((const struct loop *, edge));
+void clear_log_links                    PARAMS ((rtx));
 
 /* Find basic blocks of the current function.
    F is the first insn of the function and NREGS the number of register
@@ -1369,7 +1370,8 @@ split_edge (edge_in)
 	  basic_block jump_block;
 	  rtx pos;
 
-	  if ((e->flags & EDGE_CRITICAL) == 0)
+	  if ((e->flags & EDGE_CRITICAL) == 0
+	      && e->src != ENTRY_BLOCK_PTR)
 	    {
 	      /* Non critical -- we can simply add a jump to the end
 		 of the existing predecessor.  */
@@ -7047,7 +7049,6 @@ flow_loop_outside_edge_p (loop, e)
 }
 
 
-
 typedef struct reorder_block_def {
   int flags;
   int index;
@@ -7769,3 +7770,14 @@ reorder_basic_blocks ()
   flow_loops_free (&loops_info);
 }
 
+
+/* Clear LOG_LINKS fields of insns in a chain.  */
+void
+clear_log_links (insns)
+     rtx insns;
+{
+  rtx i;
+  for (i = insns; i; i = NEXT_INSN (i))
+    if (GET_RTX_CLASS (GET_CODE (i)) == 'i')
+      LOG_LINKS (i) = 0;
+}