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

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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.

From-SVN: r268453
This commit is contained in:
Segher Boessenkool 2019-02-01 17:26:48 +01:00 committed by Segher Boessenkool
parent 09e3944e2b
commit e71ac16355
2 changed files with 8 additions and 3 deletions
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5
gcc/ChangeLog
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@ -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

6
gcc/combine.c
View File

@ -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;