From: vries <vries@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Tue, 17 Nov 2015 21:42:27 +0000 (+0000)
Subject: Make fdump-tree-sccp-details more complete
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5aa78b2ea4bd93f976fe3c619188cc219cf351d9;p=thirdparty%2Fgcc.git

Make fdump-tree-sccp-details more complete

2015-11-17  Tom de Vries  <tom@codesourcery.com>

	* tree-scalar-evolution.c (scev_const_prop): Dump details if replacing
	uses of ssa_name with constant.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@230504 138bc75d-0d04-0410-961f-82ee72b054a4
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index a21f18bbb820..8267d67c956e 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2015-11-17  Tom de Vries  <tom@codesourcery.com>
+
+	* tree-scalar-evolution.c (scev_const_prop): Dump details if replacing
+	uses of ssa_name with constant.
+
 2015-11-17  Tom de Vries  <tom@codesourcery.com>
 
 	* tree-ssa-ccp.c (do_ssa_ccp): Clear LOOP_CLOSED_SSA in loops state if
diff --git a/gcc/tree-scalar-evolution.c b/gcc/tree-scalar-evolution.c
index e90aafb771cc..27630f0e9298 100644
--- a/gcc/tree-scalar-evolution.c
+++ b/gcc/tree-scalar-evolution.c
@@ -3465,7 +3465,17 @@ scev_const_prop (void)
 
 	  /* Replace the uses of the name.  */
 	  if (name != ev)
-	    replace_uses_by (name, ev);
+	    {
+	      if (dump_file && (dump_flags & TDF_DETAILS))
+		{
+		  fprintf (dump_file, "Replacing uses of: ");
+		  print_generic_expr (dump_file, name, 0);
+		  fprintf (dump_file, " with: ");
+		  print_generic_expr (dump_file, ev, 0);
+		  fprintf (dump_file, "\n");
+		}
+	      replace_uses_by (name, ev);
+	    }
 
 	  if (!ssa_names_to_remove)
 	    ssa_names_to_remove = BITMAP_ALLOC (NULL);