[PATCH] RISC-V: Fix infinite compilation of VSETVL PASS

[Juzhe-Zhong]

This patch fixes issue reported by Jeff.

Testing is running. Ok for trunk if I passed the testing with no regression ?

gcc/ChangeLog:

        * config/riscv/riscv-vsetvl.cc (pre_vsetvl::emit_vsetvl): Fix inifinite 
compilation.
        (pre_vsetvl::remove_vsetvl_pre_insns): Ditto.

---
 gcc/config/riscv/riscv-vsetvl.cc | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/gcc/config/riscv/riscv-vsetvl.cc b/gcc/config/riscv/riscv-vsetvl.cc
index 2c0dcdf18c5..32f262de199 100644
--- a/gcc/config/riscv/riscv-vsetvl.cc
+++ b/gcc/config/riscv/riscv-vsetvl.cc
@@ -2281,9 +2281,8 @@ private:
       }
   }
 
-  void remove_vsetvl_insn (const vsetvl_info &info)
+  void remove_vsetvl_insn (rtx_insn *rinsn)
   {
-    rtx_insn *rinsn = info.get_insn ()->rtl ();
     if (dump_file)
       {
        fprintf (dump_file, "  Eliminate insn %d:\n", INSN_UID (rinsn));
@@ -3231,7 +3230,7 @@ pre_vsetvl::emit_vsetvl ()
          if (curr_info.delete_p ())
            {
              if (vsetvl_insn_p (insn->rtl ()))
-               remove_vsetvl_insn (curr_info);
+               remove_vsetvl_insn (curr_info.get_insn ()->rtl ());
              continue;
            }
          else if (curr_info.valid_p ())
@@ -3269,7 +3268,7 @@ pre_vsetvl::emit_vsetvl ()
   for (const vsetvl_info &item : m_delete_list)
     {
       gcc_assert (vsetvl_insn_p (item.get_insn ()->rtl ()));
-      remove_vsetvl_insn (item);
+      remove_vsetvl_insn (item.get_insn ()->rtl ());
     }
 
   /* Insert vsetvl info that was not deleted after lift up.  */
@@ -3434,7 +3433,7 @@ pre_vsetvl::remove_vsetvl_pre_insns ()
                       INSN_UID (rinsn));
              print_rtl_single (dump_file, rinsn);
            }
-         remove_insn (rinsn);
+         remove_vsetvl_insn (rinsn);
        }
 }
 
-- 
2.36.3