Ignore this patch plz. It's not finished.
The correct && full patch is this:
https://gcc.gnu.org/pipermail/gcc-patches/2022-October/603148.html 
Thanks.



juzhe.zhong@rivai.ai
 
From: juzhe.zhong
Date: 2022-10-10 21:49
To: gcc-patches
CC: kito.cheng; Ju-Zhe Zhong
Subject: [PATCH] RISC-V: move struct vector_type_info from *.h to *.cc.
From: Ju-Zhe Zhong <juzhe.zhong@rivai.ai>
 
gcc/ChangeLog:
 
        * config/riscv/riscv-vector-builtins.cc (struct vector_type_info): Move from riscv-vector-builtins.h.
        * config/riscv/riscv-vector-builtins.h (struct vector_type_info): Move to riscv-vector-builtins.cc.
 
---
gcc/config/riscv/riscv-vector-builtins.cc | 16 ++++++++++++++++
gcc/config/riscv/riscv-vector-builtins.h  | 16 ----------------
2 files changed, 16 insertions(+), 16 deletions(-)
 
diff --git a/gcc/config/riscv/riscv-vector-builtins.cc b/gcc/config/riscv/riscv-vector-builtins.cc
index 0096e32f5e4..d7b567a7ba1 100644
--- a/gcc/config/riscv/riscv-vector-builtins.cc
+++ b/gcc/config/riscv/riscv-vector-builtins.cc
@@ -50,6 +50,22 @@ using namespace riscv_vector;
namespace riscv_vector {
+/* Static information about each vector type.  */
+struct vector_type_info
+{
+  /* The name of the type as declared by riscv_vector.h
+     which is recommend to use. For example: 'vint32m1_t'.  */
+  const char *name;
+
+  /* ABI name of vector type. The type is always available
+     under this name, even when riscv_vector.h isn't included.
+     For example:  '__rvv_int32m1_t'.  */
+  const char *abi_name;
+
+  /* The C++ mangling of ABI_NAME.  */
+  const char *mangled_name;
+};
+
/* Information about each RVV type.  */
static CONSTEXPR const vector_type_info vector_types[] = {
#define DEF_RVV_TYPE(USER_NAME, NCHARS, ABI_NAME, ARGS...)    \
diff --git a/gcc/config/riscv/riscv-vector-builtins.h b/gcc/config/riscv/riscv-vector-builtins.h
index 6ca0b073964..524fb0b02c2 100644
--- a/gcc/config/riscv/riscv-vector-builtins.h
+++ b/gcc/config/riscv/riscv-vector-builtins.h
@@ -26,22 +26,6 @@ namespace riscv_vector {
/* This is for segment instructions.  */
const unsigned int MAX_TUPLE_SIZE = 8;
-/* Static information about each vector type.  */
-struct vector_type_info
-{
-  /* The name of the type as declared by riscv_vector.h
-     which is recommend to use. For example: 'vint32m1_t'.  */
-  const char *user_name;
-
-  /* ABI name of vector type. The type is always available
-     under this name, even when riscv_vector.h isn't included.
-     For example:  '__rvv_int32m1_t'.  */
-  const char *abi_name;
-
-  /* The C++ mangling of ABI_NAME.  */
-  const char *mangled_name;
-};
-
/* Enumerates the RVV types, together called
    "vector types" for brevity.  */
enum vector_type_index
-- 
2.36.1