[PATCH v2] MIPS: Output $0 for conditional trap if !ISA_HAS_COND_TRAPI

[YunQiang Su]

MIPSr6 removes condition trap instructions with imm, so the instruction
like `teq $2,imm` will be converted to
  li $at, imm
  teq $2, $at

The current version of Gas cannot detect if imm is zero, and output
  teq $2, $0
Let's do it in GCC.

gcc
        * config/mips/mips.md(conditional_trap_reg): Output $0 instead
        of 0 if !ISA_HAS_COND_TRAPI.
---
 gcc/config/mips/mips.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gcc/config/mips/mips.md b/gcc/config/mips/mips.md
index 9962313602a..fd64d3d001a 100644
--- a/gcc/config/mips/mips.md
+++ b/gcc/config/mips/mips.md
@@ -1245,7 +1245,7 @@ (define_insn "*conditional_trap_reg<mode>"
                                 (match_operand:GPR 2 "reg_or_0_operand" "dJ")])
            (const_int 0))]
   "ISA_HAS_COND_TRAP && !ISA_HAS_COND_TRAPI"
-  "t%C0\t%z1,%2"
+  "t%C0\t%z1,%z2"
   [(set_attr "type" "trap")])
 
 (define_insn "*conditional_trap<mode>"
-- 
2.39.3 (Apple Git-146)