[gcc r13-5408] RISC-V: Fix bugs of available condition.

[gcc r13-5408] RISC-V: Fix bugs of available condition.

[Kito Cheng]

https://gcc.gnu.org/g:cca9c44eca42d71ef20fc00a261616ba66edd089

commit r13-5408-gcca9c44eca42d71ef20fc00a261616ba66edd089
Author: Ju-Zhe Zhong <juzhe.zhong@rivai.ai>
Date:   Tue Jan 3 15:30:30 2023 +0800

    RISC-V: Fix bugs of available condition.
    
    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.

Diff:
---
 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 f6f24f73813..7e292f0dbdd 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;