[PATCH 2/2] RISC-V: Make `fence.tso' a non-alias

[Tsukasa OI <research_trasio@irq.a4lg.com>]

While `fence.tso' is a subset of original `FENCE' instruction in RISC-V
ISA, `fence' instruction as defined in the GNU Binutils (constrained to
fm=0b0000) is not a superset of `fence.tso'.  As a result, it resulted
in `.4byte' when disassembled with `no-aliases` option.
This commit makes `fence.tso' instruction a non-alias.

gas/ChangeLog:

	* testsuite/gas/riscv/fence-tso.d: Make sure that `fence.tso'
	is currently not an alias.

opcodes/ChangeLog:

	* riscv-opc.c (riscv_opcodes): Make `fence.tso' instruction
	a non-alias.
---
 gas/testsuite/gas/riscv/fence-tso.d | 2 +-
 opcodes/riscv-opc.c                 | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/gas/testsuite/gas/riscv/fence-tso.d b/gas/testsuite/gas/riscv/fence-tso.d
index ef8a4cdd1c9..00170f1259e 100644
--- a/gas/testsuite/gas/riscv/fence-tso.d
+++ b/gas/testsuite/gas/riscv/fence-tso.d
@@ -1,5 +1,5 @@
 #as: -march=rv32ic
-#objdump: -dr
+#objdump: -dr -M no-aliases
 
 .*:[ 	]+file format .*
 
diff --git a/opcodes/riscv-opc.c b/opcodes/riscv-opc.c
index 6c5b2eaf524..50a51b40d69 100644
--- a/opcodes/riscv-opc.c
+++ b/opcodes/riscv-opc.c
@@ -421,7 +421,7 @@ const struct riscv_opcode riscv_opcodes[] =
 {"fence",       0, INSN_CLASS_I, "",          MATCH_FENCE|MASK_PRED|MASK_SUCC, MASK_FENCE|MASK_RD|MASK_RS1|MASK_IMM, match_opcode, INSN_ALIAS },
 {"fence",       0, INSN_CLASS_I, "P,Q",       MATCH_FENCE, MASK_FENCE|MASK_RD|MASK_RS1|(MASK_IMM & ~MASK_PRED & ~MASK_SUCC), match_opcode, 0 },
 {"fence.i",     0, INSN_CLASS_ZIFENCEI, "",   MATCH_FENCE_I, MASK_FENCE|MASK_RD|MASK_RS1|MASK_IMM, match_opcode, 0 },
-{"fence.tso",   0, INSN_CLASS_I, "",          MATCH_FENCE_TSO, MASK_FENCE_TSO|MASK_RD|MASK_RS1, match_opcode, INSN_ALIAS },
+{"fence.tso",   0, INSN_CLASS_I, "",          MATCH_FENCE_TSO, MASK_FENCE_TSO|MASK_RD|MASK_RS1, match_opcode, 0 },
 {"rdcycle",     0, INSN_CLASS_I, "d",         MATCH_RDCYCLE, MASK_RDCYCLE, match_opcode, INSN_ALIAS },
 {"rdinstret",   0, INSN_CLASS_I, "d",         MATCH_RDINSTRET, MASK_RDINSTRET, match_opcode, INSN_ALIAS },
 {"rdtime",      0, INSN_CLASS_I, "d",         MATCH_RDTIME, MASK_RDTIME, match_opcode, INSN_ALIAS },
-- 
2.34.1