[PATCH v1] RISC-V: Fix one warning of maybe-uninitialized in riscv-vsetvl.cc

[Pan Li via Gcc-patches]

From: Pan Li <pan2...@intel.com>

This patch would like to fix one maybe-uninitialized warning. Aka:

riscv-vsetvl.cc:4354:3: error: 'vsetvl_rinsn' may be used uninitialized 
[-Werror=maybe-uninitialized]

Signed-off-by: Pan Li <pan2...@intel.com>

gcc/ChangeLog:

        * config/riscv/riscv-vsetvl.cc
        (pass_vsetvl::global_eliminate_vsetvl_insn): Initialize var by NULL.
---
 gcc/config/riscv/riscv-vsetvl.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gcc/config/riscv/riscv-vsetvl.cc b/gcc/config/riscv/riscv-vsetvl.cc
index cae9be0d928..7066dea3d14 100644
--- a/gcc/config/riscv/riscv-vsetvl.cc
+++ b/gcc/config/riscv/riscv-vsetvl.cc
@@ -4340,7 +4340,7 @@ get_first_vsetvl_before_rvv_insns (basic_block cfg_bb)
 bool
 pass_vsetvl::global_eliminate_vsetvl_insn (const bb_info *bb) const
 {
-  rtx_insn *vsetvl_rinsn;
+  rtx_insn *vsetvl_rinsn = NULL;
   vector_insn_info dem = vector_insn_info ();
   const auto &block_info = get_block_info (bb);
   basic_block cfg_bb = bb->cfg_bb ();
-- 
2.34.1