[PATCH 1/2] combine: Print insns with the cost dump

[Segher Boessenkool]

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).

Tested on powerpc64-linux {-m32,-m64}, committing to trunk


Segher


2017-06-29  Segher Boessenkool  <seg...@kernel.crashing.org>

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

---
 gcc/combine.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/gcc/combine.c b/gcc/combine.c
index 73895b6..c49b2b2 100644
--- 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);
+             }
          }
     }
 
-- 
1.9.3