--- a/gcc/config/arm/arm.opt	Fri Oct 27 22:46:09 2017 +0900
+++ b/gcc/config/arm/arm.opt	Thu Oct 25 07:37:49 2018 +0900
@@ -1,6 +1,6 @@
 ; Options for the ARM port of the compiler.
 
-; Copyright (C) 2005-2017 Free Software Foundation, Inc.
+; Copyright (C) 2005-2018 Free Software Foundation, Inc.
 ;
 ; This file is part of GCC.
 ;
@@ -254,6 +254,10 @@
 Target Report RejectNegative Mask(NEON_VECTORIZE_DOUBLE)
 Use Neon double-word (rather than quad-word) registers for vectorization.
 
+mverbose-cost-dump
+Common Undocumented Var(arm_verbose_cost) Init(0)
+Enable more verbose RTX cost dumps during debug.  For GCC developers use only.
+
 mword-relocations
 Target Report Var(target_word_relocations) Init(TARGET_DEFAULT_WORD_RELOCATIONS)
 Only generate absolute relocations on word sized values.
@@ -294,3 +298,7 @@
 mbe32
 Target Report RejectNegative Negative(mbe8) InverseMask(BE8)
 When linking for big-endian targets, generate a legacy BE32 format image.
+
+mbranch-cost=
+Target RejectNegative Joined UInteger Var(arm_branch_cost) Init(-1)
+Cost to assume for a branch insn.