From: segher <segher@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Fri, 1 Feb 2019 16:26:48 +0000 (+0000)
Subject: combine: Use TDF_DETAILS for "can't combine" dump prints
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f280c6d35cae94f5ac6aea071a3d84d24f9abec0;p=thirdparty%2Fgcc.git

combine: Use TDF_DETAILS for "can't combine" dump prints

Some people use the -fdump-rtl-combine dumps (instead of the -da or
-fdump-rtl-combine-all dump), but the "Can't combine iN into iM"
messages do not make any sense if the failed combine attempts are not
printed otherwise.  So let's change that.


	* combine.c (try_combine): Do not print "Can't combine" messages unless
	printing failed combination attempts.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@268453 138bc75d-0d04-0410-961f-82ee72b054a4
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 5b34956eb062..fba9fcf350b5 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2019-02-01  Segher Boessenkool  <segher@kernel.crashing.org>
+
+	* combine.c (try_combine): Do not print "Can't combine" messages unless
+	printing failed combination attempts.
+
 2019-02-01  Martin Jambor  <mjambor@suse.cz>
 
 	PR hsa/87863
diff --git a/gcc/combine.c b/gcc/combine.c
index c108f657c88a..7e1992f866f5 100644
--- a/gcc/combine.c
+++ b/gcc/combine.c
@@ -3078,21 +3078,21 @@ try_combine (rtx_insn *i3, rtx_insn *i2, rtx_insn *i1, rtx_insn *i0,
   /* Verify that I2 and maybe I1 and I0 can be combined into I3.  */
   if (!can_combine_p (i2, i3, i0, i1, NULL, NULL, &i2dest, &i2src))
     {
-      if (dump_file)
+      if (dump_file && (dump_flags & TDF_DETAILS))
 	fprintf (dump_file, "Can't combine i2 into i3\n");
       undo_all ();
       return 0;
     }
   if (i1 && !can_combine_p (i1, i3, i0, NULL, i2, NULL, &i1dest, &i1src))
     {
-      if (dump_file)
+      if (dump_file && (dump_flags & TDF_DETAILS))
 	fprintf (dump_file, "Can't combine i1 into i3\n");
       undo_all ();
       return 0;
     }
   if (i0 && !can_combine_p (i0, i3, NULL, NULL, i1, i2, &i0dest, &i0src))
     {
-      if (dump_file)
+      if (dump_file && (dump_flags & TDF_DETAILS))
 	fprintf (dump_file, "Can't combine i0 into i3\n");
       undo_all ();
       return 0;