combine: Print insns with the cost dump

In the combine dump file, at the start there is a list of the RTL cost
of every insn.  The only thing listed about the insns is the UID though.
To make it more useful, this patch prints the insn itself as well (in
slim format).

	* combine.c (combine_instructions): Print insns to dump_file, together
	with their costs.

From-SVN: r249802

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 2f339cc..dac1d7a 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2017-06-29  Segher Boessenkool  <segher@kernel.crashing.org>
+
+       * combine.c (combine_instructions): Print insns to dump_file, together
+       with their costs.
+
 2017-06-29  Jan Hubicka  <hubicka@ucw.cz>
 
        * asan.c (asan_emit_stack_protection): Update.

diff --git a/gcc/combine.c b/gcc/combine.c
index 2d49bc2..e993826 100644 (file)
--- a/gcc/combine.c
+++ b/gcc/combine.c
@@ -1213,8 +1213,10 @@ combine_instructions (rtx_insn *f, unsigned int nregs)
              INSN_COST (insn) = insn_rtx_cost (PATTERN (insn),
                                                optimize_this_for_speed_p);
            if (dump_file)
-             fprintf (dump_file, "insn_cost %d: %d\n",
-                      INSN_UID (insn), INSN_COST (insn));
+             {
+               fprintf (dump_file, "insn_cost %d for ", INSN_COST (insn));
+               dump_insn_slim (dump_file, insn);
+             }
          }
     }