From f53bd856482af56a7af70bbae243f0c2af296b0e Mon Sep 17 00:00:00 2001 From: Segher Boessenkool Date: Fri, 3 Nov 2017 01:19:06 +0100 Subject: [PATCH] combine: Print insns we try to combine This adds some extra debug info to the dump file for combine: print the insns that are input to try_combine. I was worried printing more will make the dump file only harder to read, but especially the info from the REG_DEAD notes is invaluable. * combine (try_combine): Print the insns input to try_combine to the dump file. From-SVN: r254365 --- gcc/ChangeLog | 5 +++++ gcc/combine.c | 7 +++++++ 2 files changed, 12 insertions(+) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index d7a6f39287a..7502184f7db 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2017-11-02 Segher Boessenkool + + * combine (try_combine): Print the insns input to try_combine to the + dump file. + 2017-11-02 Steve Ellcey PR target/79868 diff --git a/gcc/combine.c b/gcc/combine.c index 968e6871e99..eab10c599a6 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -2771,6 +2771,13 @@ try_combine (rtx_insn *i3, rtx_insn *i2, rtx_insn *i1, rtx_insn *i0, else fprintf (dump_file, "\nTrying %d -> %d:\n", INSN_UID (i2), INSN_UID (i3)); + + if (i0) + dump_insn_slim (dump_file, i0); + if (i1) + dump_insn_slim (dump_file, i1); + dump_insn_slim (dump_file, i2); + dump_insn_slim (dump_file, i3); } /* If multiple insns feed into one of I2 or I3, they can be in any -- 2.30.2