[PATCH] RISC-V: Fix bugs of available condition.

[juzhe . zhong]

From: Ju-Zhe Zhong <juzhe.zh...@rivai.ai>

Suppose there are 2 demand infos:

Demand 1: demand TAIL.
Demand 2: not demand TAIL.

If a block is demand 1, we should adjust this block is available both for 
demand 1 && 2.
However, if a block is demand 2, we should only adjust this block is available 
for demand 2 only.

gcc/ChangeLog:

        * config/riscv/riscv-vsetvl.cc (vector_insn_info::operator>=): Fix 
available condition.

---
 gcc/config/riscv/riscv-vsetvl.cc | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/gcc/config/riscv/riscv-vsetvl.cc b/gcc/config/riscv/riscv-vsetvl.cc
index 6dbaea32b03..52f0195980a 100644
--- a/gcc/config/riscv/riscv-vsetvl.cc
+++ b/gcc/config/riscv/riscv-vsetvl.cc
@@ -1048,12 +1048,10 @@ vector_insn_info::operator>= (const vector_insn_info 
&other) const
        }
     }
 
-  if (demand_p (DEMAND_TAIL_POLICY) && !other.demand_p (DEMAND_TAIL_POLICY)
-      && get_ta () != other.get_ta ())
+  if (!demand_p (DEMAND_TAIL_POLICY) && other.demand_p (DEMAND_TAIL_POLICY))
     return false;
 
-  if (demand_p (DEMAND_MASK_POLICY) && !other.demand_p (DEMAND_MASK_POLICY)
-      && get_ma () != other.get_ma ())
+  if (!demand_p (DEMAND_MASK_POLICY) && other.demand_p (DEMAND_MASK_POLICY))
     return false;
 
   return true;
-- 
2.36.3