From: Richard Biener <rguenther@suse.de>
Date: Fri, 22 Apr 2016 09:05:10 +0000 (+0000)
Subject: lto-streamer-in.c (input_ssa_names): Do not allocate GIMPLE_NOP for all SSA names.
X-Git-Tag: upstream/12.2.0~47652
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=9a13d066d74c4842a453297b9d2ad9b07348e623;p=platform%2Fupstream%2Fgcc.git

lto-streamer-in.c (input_ssa_names): Do not allocate GIMPLE_NOP for all SSA names.

2016-04-22  Richard Biener  <rguenther@suse.de>

	* lto-streamer-in.c (input_ssa_names): Do not allocate
	GIMPLE_NOP for all SSA names.
	* lto-streamer-out.c (output_ssa_names): Do not output
	SSA names that should have been released.

From-SVN: r235360
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index d0aeef4..2f462c4 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,12 @@
 2016-04-22  Richard Biener  <rguenther@suse.de>
 
+	* lto-streamer-in.c (input_ssa_names): Do not allocate
+	GIMPLE_NOP for all SSA names.
+	* lto-streamer-out.c (output_ssa_names): Do not output
+	SSA names that should have been released.
+
+2016-04-22  Richard Biener  <rguenther@suse.de>
+
 	PR tree-optimization/70740
 	* tree-ssa-phiprop.c (propagate_with_phi): Handle inserted
 	VDEF.
diff --git a/gcc/lto-streamer-in.c b/gcc/lto-streamer-in.c
index dd48777..1970d45 100644
--- a/gcc/lto-streamer-in.c
+++ b/gcc/lto-streamer-in.c
@@ -881,10 +881,13 @@ input_ssa_names (struct lto_input_block *ib, struct data_in *data_in,
 
       is_default_def = (streamer_read_uchar (ib) != 0);
       name = stream_read_tree (ib, data_in);
-      ssa_name = make_ssa_name_fn (fn, name, gimple_build_nop ());
+      ssa_name = make_ssa_name_fn (fn, name, NULL);
 
       if (is_default_def)
-	set_ssa_default_def (cfun, SSA_NAME_VAR (ssa_name), ssa_name);
+	{
+	  set_ssa_default_def (cfun, SSA_NAME_VAR (ssa_name), ssa_name);
+	  SSA_NAME_DEF_STMT (ssa_name) = gimple_build_nop ();
+	}
 
       i = streamer_read_uhwi (ib);
     }
diff --git a/gcc/lto-streamer-out.c b/gcc/lto-streamer-out.c
index 6703d41..35e58fd 100644
--- a/gcc/lto-streamer-out.c
+++ b/gcc/lto-streamer-out.c
@@ -1816,7 +1816,11 @@ output_ssa_names (struct output_block *ob, struct function *fn)
 
       if (ptr == NULL_TREE
 	  || SSA_NAME_IN_FREE_LIST (ptr)
-	  || virtual_operand_p (ptr))
+	  || virtual_operand_p (ptr)
+	  /* Simply skip unreleased SSA names.  */
+	  || (! SSA_NAME_IS_DEFAULT_DEF (ptr)
+	      && (! SSA_NAME_DEF_STMT (ptr)
+		  || ! gimple_bb (SSA_NAME_DEF_STMT (ptr)))))
 	continue;
 
       streamer_write_uhwi (ob, i);