[v1] RISC-V: Allow RVV intrinsic when function target("arch=+v")

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

This patch would like to allow the RVV intrinsic when function is
attributed as target("arch=+v") and build with rv64gc.  For example:

vint32m1_t
__attribute__((target("arch=+v")))
test_1 (vint32m1_t a, vint32m1_t b, size_t vl)
{
  return __riscv_vadd_vv_i32m1 (a, b, vl);
}

build with -march=rv64gc -mabi=lp64d -O3, we will have asm like below:
test_1:
  .option push
  .option arch, rv64i2p1_m2p0_a2p1_f2p2_d2p2_c2p0_v1p0_zicsr2p0_\
zifencei2p0_zve32f1p0_zve32x1p0_zve64d1p0_zve64f1p0_zve64x1p0_zvl128b1p0_zvl32b1p0_zvl64b1p0
  vsetvli zero,a0,e32,m1,ta,ma
  vadd.vv v8,v8,v9
  ret

The riscv_vector.h must be included when leverage intrinisc type(s) and
API(s).  And the scope of this attribute should not excced the function
body.  Meanwhile, to make rvv types and API(s) available for this attribute,
include riscv_vector.h will not report error for now if v is not present
in march.

Below test are passed for this patch:
* The riscv fully regression test.

gcc/ChangeLog:

	* config/riscv/riscv-c.cc (riscv_pragma_intrinsic): Remove error
	when V is disabled and init the RVV types and intrinic APIs.
	* config/riscv/riscv-vector-builtins.cc (expand_builtin): Report
	error if V ext is disabled.
	* config/riscv/riscv.cc (riscv_return_value_is_vector_type_p):
	Ditto.
	(riscv_arguments_is_vector_type_p): Ditto.
	(riscv_vector_cc_function_p): Ditto.
	* config/riscv/riscv_vector.h: Remove error if V is disable.

gcc/testsuite/ChangeLog:

	* gcc.target/riscv/rvv/base/pragma-1.c: Remove.
	* gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-1.c: New test.
	* gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-2.c: New test.
	* gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-3.c: New test.
	* gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-4.c: New test.
	* gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-5.c: New test.
	* gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-6.c: New test.
	* gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-7.c: New test.
	* gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-8.c: New test.

Signed-off-by: Pan Li <pan2.li@intel.com>
---
 gcc/config/riscv/riscv-c.cc                   | 18 +++++++----
 gcc/config/riscv/riscv-vector-builtins.cc     |  5 ++++
 gcc/config/riscv/riscv.cc                     | 30 ++++++++++++++++---
 gcc/config/riscv/riscv_vector.h               |  4 ---
 .../gcc.target/riscv/rvv/base/pragma-1.c      |  4 ---
 .../target_attribute_v_with_intrinsic-1.c     |  5 ++++
 .../target_attribute_v_with_intrinsic-2.c     | 18 +++++++++++
 .../target_attribute_v_with_intrinsic-3.c     | 13 ++++++++
 .../target_attribute_v_with_intrinsic-4.c     | 10 +++++++
 .../target_attribute_v_with_intrinsic-5.c     | 12 ++++++++
 .../target_attribute_v_with_intrinsic-6.c     | 12 ++++++++
 .../target_attribute_v_with_intrinsic-7.c     |  9 ++++++
 .../target_attribute_v_with_intrinsic-8.c     | 23 ++++++++++++++
 13 files changed, 145 insertions(+), 18 deletions(-)
 delete mode 100644 gcc/testsuite/gcc.target/riscv/rvv/base/pragma-1.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-1.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-2.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-3.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-4.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-5.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-6.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-7.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-8.c

LGTM, thanks :)

On Mon, Mar 25, 2024 at 3:42 PM <pan2.li@intel.com> wrote:
>
> From: Pan Li <pan2.li@intel.com>
>
> This patch would like to allow the RVV intrinsic when function is
> attributed as target("arch=+v") and build with rv64gc.  For example:
>
> vint32m1_t
> __attribute__((target("arch=+v")))
> test_1 (vint32m1_t a, vint32m1_t b, size_t vl)
> {
>   return __riscv_vadd_vv_i32m1 (a, b, vl);
> }
>
> build with -march=rv64gc -mabi=lp64d -O3, we will have asm like below:
> test_1:
>   .option push
>   .option arch, rv64i2p1_m2p0_a2p1_f2p2_d2p2_c2p0_v1p0_zicsr2p0_\
> zifencei2p0_zve32f1p0_zve32x1p0_zve64d1p0_zve64f1p0_zve64x1p0_zvl128b1p0_zvl32b1p0_zvl64b1p0
>   vsetvli zero,a0,e32,m1,ta,ma
>   vadd.vv v8,v8,v9
>   ret
>
> The riscv_vector.h must be included when leverage intrinisc type(s) and
> API(s).  And the scope of this attribute should not excced the function
> body.  Meanwhile, to make rvv types and API(s) available for this attribute,
> include riscv_vector.h will not report error for now if v is not present
> in march.
>
> Below test are passed for this patch:
> * The riscv fully regression test.
>
> gcc/ChangeLog:
>
>         * config/riscv/riscv-c.cc (riscv_pragma_intrinsic): Remove error
>         when V is disabled and init the RVV types and intrinic APIs.
>         * config/riscv/riscv-vector-builtins.cc (expand_builtin): Report
>         error if V ext is disabled.
>         * config/riscv/riscv.cc (riscv_return_value_is_vector_type_p):
>         Ditto.
>         (riscv_arguments_is_vector_type_p): Ditto.
>         (riscv_vector_cc_function_p): Ditto.
>         * config/riscv/riscv_vector.h: Remove error if V is disable.
>
> gcc/testsuite/ChangeLog:
>
>         * gcc.target/riscv/rvv/base/pragma-1.c: Remove.
>         * gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-1.c: New test.
>         * gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-2.c: New test.
>         * gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-3.c: New test.
>         * gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-4.c: New test.
>         * gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-5.c: New test.
>         * gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-6.c: New test.
>         * gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-7.c: New test.
>         * gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-8.c: New test.
>
> Signed-off-by: Pan Li <pan2.li@intel.com>
> ---
>  gcc/config/riscv/riscv-c.cc                   | 18 +++++++----
>  gcc/config/riscv/riscv-vector-builtins.cc     |  5 ++++
>  gcc/config/riscv/riscv.cc                     | 30 ++++++++++++++++---
>  gcc/config/riscv/riscv_vector.h               |  4 ---
>  .../gcc.target/riscv/rvv/base/pragma-1.c      |  4 ---
>  .../target_attribute_v_with_intrinsic-1.c     |  5 ++++
>  .../target_attribute_v_with_intrinsic-2.c     | 18 +++++++++++
>  .../target_attribute_v_with_intrinsic-3.c     | 13 ++++++++
>  .../target_attribute_v_with_intrinsic-4.c     | 10 +++++++
>  .../target_attribute_v_with_intrinsic-5.c     | 12 ++++++++
>  .../target_attribute_v_with_intrinsic-6.c     | 12 ++++++++
>  .../target_attribute_v_with_intrinsic-7.c     |  9 ++++++
>  .../target_attribute_v_with_intrinsic-8.c     | 23 ++++++++++++++
>  13 files changed, 145 insertions(+), 18 deletions(-)
>  delete mode 100644 gcc/testsuite/gcc.target/riscv/rvv/base/pragma-1.c
>  create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-1.c
>  create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-2.c
>  create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-3.c
>  create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-4.c
>  create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-5.c
>  create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-6.c
>  create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-7.c
>  create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-8.c
>
> diff --git a/gcc/config/riscv/riscv-c.cc b/gcc/config/riscv/riscv-c.cc
> index edb866d51e4..01314037461 100644
> --- a/gcc/config/riscv/riscv-c.cc
> +++ b/gcc/config/riscv/riscv-c.cc
> @@ -201,14 +201,20 @@ riscv_pragma_intrinsic (cpp_reader *)
>    if (strcmp (name, "vector") == 0
>        || strcmp (name, "xtheadvector") == 0)
>      {
> -      if (!TARGET_VECTOR)
> +      if (TARGET_VECTOR)
> +       riscv_vector::handle_pragma_vector ();
> +      else /* Indicates riscv_vector.h is included but v is missing in arch  */
>         {
> -         error ("%<#pragma riscv intrinsic%> option %qs needs 'V' or "
> -                "'XTHEADVECTOR' extension enabled",
> -                name);
> -         return;
> +         /* To make the the rvv types and intrinsic API available for the
> +            target("arch=+v") attribute,  we need to temporally enable the
> +            TARGET_VECTOR, and disable it after all initialized.  */
> +         target_flags |= MASK_VECTOR;
> +
> +         riscv_vector::init_builtins ();
> +         riscv_vector::handle_pragma_vector ();
> +
> +         target_flags &= ~MASK_VECTOR;
>         }
> -      riscv_vector::handle_pragma_vector ();
>      }
>    else
>      error ("unknown %<#pragma riscv intrinsic%> option %qs", name);
> diff --git a/gcc/config/riscv/riscv-vector-builtins.cc b/gcc/config/riscv/riscv-vector-builtins.cc
> index c5881a501d1..e07373d8b57 100644
> --- a/gcc/config/riscv/riscv-vector-builtins.cc
> +++ b/gcc/config/riscv/riscv-vector-builtins.cc
> @@ -4586,6 +4586,11 @@ rtx
>  expand_builtin (unsigned int code, tree exp, rtx target)
>  {
>    registered_function &rfn = *(*registered_functions)[code];
> +
> +  if (!TARGET_VECTOR)
> +    error_at (EXPR_LOCATION (exp),
> +             "builtin function %qE requires the V ISA extension", exp);
> +
>    return function_expander (rfn.instance, rfn.decl, exp, target).expand ();
>  }
>
> diff --git a/gcc/config/riscv/riscv.cc b/gcc/config/riscv/riscv.cc
> index 6d11576a8fd..fe9976bfffe 100644
> --- a/gcc/config/riscv/riscv.cc
> +++ b/gcc/config/riscv/riscv.cc
> @@ -5467,7 +5467,15 @@ riscv_return_value_is_vector_type_p (const_tree fntype)
>  {
>    tree return_type = TREE_TYPE (fntype);
>
> -  return riscv_vector_type_p (return_type);
> +  if (riscv_vector_type_p (return_type))
> +    {
> +      if (!TARGET_VECTOR)
> +       error_at (input_location,
> +                 "return type %qT requires the V ISA extension", return_type);
> +      return true;
> +    }
> +  else
> +    return false;
>  }
>
>  /* Return true if a function with type FNTYPE takes arguments in
> @@ -5481,7 +5489,13 @@ riscv_arguments_is_vector_type_p (const_tree fntype)
>      {
>        tree arg_type = TREE_VALUE (chain);
>        if (riscv_vector_type_p (arg_type))
> -       return true;
> +       {
> +         if (!TARGET_VECTOR)
> +           error_at (input_location,
> +                     "argument type %qT requires the V ISA extension",
> +                     arg_type);
> +         return true;
> +       }
>      }
>
>    return false;
> @@ -5493,8 +5507,16 @@ riscv_arguments_is_vector_type_p (const_tree fntype)
>  static bool
>  riscv_vector_cc_function_p (const_tree fntype)
>  {
> -  return lookup_attribute ("vector_cc", TYPE_ATTRIBUTES (fntype)) != NULL_TREE
> -        || lookup_attribute ("riscv_vector_cc", TYPE_ATTRIBUTES (fntype)) != NULL_TREE;
> +  tree attr = TYPE_ATTRIBUTES (fntype);
> +  bool vector_cc_p = lookup_attribute ("vector_cc", attr) != NULL_TREE
> +    || lookup_attribute ("riscv_vector_cc", attr) != NULL_TREE;
> +
> +  if (vector_cc_p && !TARGET_VECTOR)
> +    error_at (input_location,
> +             "function attribute %qs requires the V ISA extension",
> +             "riscv_vector_cc");
> +
> +  return vector_cc_p;
>  }
>
>  /* Implement TARGET_FNTYPE_ABI.  */
> diff --git a/gcc/config/riscv/riscv_vector.h b/gcc/config/riscv/riscv_vector.h
> index c2fc4b35242..aa0c3aa69c0 100644
> --- a/gcc/config/riscv/riscv_vector.h
> +++ b/gcc/config/riscv/riscv_vector.h
> @@ -28,9 +28,6 @@
>  #include <stdint.h>
>  #include <stddef.h>
>
> -#ifndef __riscv_vector
> -#error "Vector intrinsics require the vector extension."
> -#else
>  #ifdef __cplusplus
>  extern "C" {
>  #endif
> @@ -45,5 +42,4 @@ extern "C" {
>  #ifdef __cplusplus
>  }
>  #endif // __cplusplus
> -#endif // __riscv_vector
>  #endif // __RISCV_VECTOR_H
> diff --git a/gcc/testsuite/gcc.target/riscv/rvv/base/pragma-1.c b/gcc/testsuite/gcc.target/riscv/rvv/base/pragma-1.c
> deleted file mode 100644
> index ef329e30785..00000000000
> --- a/gcc/testsuite/gcc.target/riscv/rvv/base/pragma-1.c
> +++ /dev/null
> @@ -1,4 +0,0 @@
> -/* { dg-do compile } */
> -/* { dg-options "-O3 -march=rv32gc -mabi=ilp32d" } */
> -
> -#pragma riscv intrinsic "vector" /* { dg-error {#pragma riscv intrinsic' option 'vector' needs 'V' or 'XTHEADVECTOR' extension enabled} } */
> diff --git a/gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-1.c b/gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-1.c
> new file mode 100644
> index 00000000000..dfe8191021e
> --- /dev/null
> +++ b/gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-1.c
> @@ -0,0 +1,5 @@
> +/* Test that we do not have error when compile */
> +/* { dg-do compile } */
> +/* { dg-options "-march=rv64gc -mabi=lp64d -O3" } */
> +
> +#include "riscv_vector.h"
> diff --git a/gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-2.c b/gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-2.c
> new file mode 100644
> index 00000000000..9992347fe6b
> --- /dev/null
> +++ b/gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-2.c
> @@ -0,0 +1,18 @@
> +/* Test that we do not have error when compile */
> +/* { dg-do compile } */
> +/* { dg-options "-march=rv64gc -mabi=lp64d -O3" } */
> +
> +#include "riscv_vector.h"
> +
> +vint32m1_t
> +__attribute__((target("arch=+v")))
> +test_1 (vint32m1_t a, vint32m1_t b, size_t vl)
> +{
> +  return __riscv_vadd_vv_i32m1 (a, b, vl);
> +}
> +
> +void
> +test_2 ()
> +{
> +  vint32m1_t a;
> +}
> diff --git a/gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-3.c b/gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-3.c
> new file mode 100644
> index 00000000000..590343ddbfd
> --- /dev/null
> +++ b/gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-3.c
> @@ -0,0 +1,13 @@
> +/* { dg-do compile } */
> +/* { dg-options "-march=rv64gc -mabi=lp64d -O3 -Wno-implicit-int" } */
> +
> +#include "riscv_vector.h"
> +
> +vint32m1_t
> +__attribute__((target("arch=+zbb")))
> +test_1 (vint32m1_t a, vint32m1_t b, size_t vl)
> +{
> +  return __riscv_vadd_vv_i32m1 (a, b, vl);
> +}
> +
> +/* { dg-error "return type 'vint32m1_t' requires the V ISA extension" "" { target { "riscv*-*-*" } } 0 } */
> diff --git a/gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-4.c b/gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-4.c
> new file mode 100644
> index 00000000000..0acece7640c
> --- /dev/null
> +++ b/gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-4.c
> @@ -0,0 +1,10 @@
> +/* { dg-do compile } */
> +/* { dg-options "-march=rv64gc -mabi=lp64d -O3" } */
> +
> +#include "riscv_vector.h"
> +
> +void
> +test_1 (vint32m1_t a) /* { dg-error {argument type 'vint32m1_t' requires the V ISA extension} } */
> +{
> +  return;
> +}
> diff --git a/gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-5.c b/gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-5.c
> new file mode 100644
> index 00000000000..2dc4217ff32
> --- /dev/null
> +++ b/gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-5.c
> @@ -0,0 +1,12 @@
> +/* { dg-do compile } */
> +/* { dg-options "-march=rv64gc -mabi=lp64d -O3" } */
> +
> +#include "riscv_vector.h"
> +
> +vint32m1_t test_1 ()
> +{
> +  vint32m1_t a;
> +  return a;
> +}
> +
> +/* { dg-error "return type 'vint32m1_t' requires the V ISA extension" "" { target { "riscv*-*-*" } } 0 } */
> diff --git a/gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-6.c b/gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-6.c
> new file mode 100644
> index 00000000000..562bb509e9e
> --- /dev/null
> +++ b/gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-6.c
> @@ -0,0 +1,12 @@
> +/* { dg-do compile } */
> +/* { dg-options "-march=rv64gc -mabi=lp64d -O3" } */
> +
> +#include "riscv_vector.h"
> +
> +int
> +__attribute__((riscv_vector_cc))
> +test_1 (int a)
> +{
> +  return a + 1;
> +}
> +/* { dg-error "function attribute 'riscv_vector_cc' requires the V ISA extension" "" { target { "riscv*-*-*" } } 0 } */
> diff --git a/gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-7.c b/gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-7.c
> new file mode 100644
> index 00000000000..520b2e59fae
> --- /dev/null
> +++ b/gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-7.c
> @@ -0,0 +1,9 @@
> +/* { dg-do compile } */
> +/* { dg-options "-march=rv64gc -mabi=lp64d -O3" } */
> +
> +#include "riscv_vector.h"
> +
> +size_t test_1 (size_t vl)
> +{
> +  return __riscv_vsetvl_e8m4 (vl); /* { dg-error {builtin function '__riscv_vsetvl_e8m4\(vl\)' requires the V ISA extension} } */
> +}
> diff --git a/gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-8.c b/gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-8.c
> new file mode 100644
> index 00000000000..9032d9d0b43
> --- /dev/null
> +++ b/gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-8.c
> @@ -0,0 +1,23 @@
> +/* { dg-do compile } */
> +/* { dg-options "-march=rv64gc -mabi=lp64d -O3" } */
> +
> +#include "riscv_vector.h"
> +
> +vint32m1_t
> +__attribute__((target("arch=+v")))
> +test_1 (vint32m1_t a, vint32m1_t b, size_t vl)
> +{
> +  return __riscv_vadd_vv_i32m1 (a, b, vl);
> +}
> +
> +void
> +test_2 ()
> +{
> +  vint32m1_t a;
> +}
> +
> +size_t
> +test_3 (size_t vl)
> +{
> +  return __riscv_vsetvl_e8m4 (vl); /* { dg-error {builtin function '__riscv_vsetvl_e8m4\(vl\)' requires the V ISA extension} } */
> +}
> --
> 2.34.1
>

Committed, thanks kito.

Pan

-----Original Message-----
From: Kito Cheng <kito.cheng@gmail.com> 
Sent: Monday, March 25, 2024 8:04 PM
To: Li, Pan2 <pan2.li@intel.com>
Cc: gcc-patches@gcc.gnu.org; juzhe.zhong@rivai.ai; Wang, Yanzhang <yanzhang.wang@intel.com>
Subject: Re: [PATCH v1] RISC-V: Allow RVV intrinsic when function target("arch=+v")

LGTM, thanks :)

On Mon, Mar 25, 2024 at 3:42 PM <pan2.li@intel.com> wrote:
>
> From: Pan Li <pan2.li@intel.com>
>
> This patch would like to allow the RVV intrinsic when function is
> attributed as target("arch=+v") and build with rv64gc.  For example:
>
> vint32m1_t
> __attribute__((target("arch=+v")))
> test_1 (vint32m1_t a, vint32m1_t b, size_t vl)
> {
>   return __riscv_vadd_vv_i32m1 (a, b, vl);
> }
>
> build with -march=rv64gc -mabi=lp64d -O3, we will have asm like below:
> test_1:
>   .option push
>   .option arch, rv64i2p1_m2p0_a2p1_f2p2_d2p2_c2p0_v1p0_zicsr2p0_\
> zifencei2p0_zve32f1p0_zve32x1p0_zve64d1p0_zve64f1p0_zve64x1p0_zvl128b1p0_zvl32b1p0_zvl64b1p0
>   vsetvli zero,a0,e32,m1,ta,ma
>   vadd.vv v8,v8,v9
>   ret
>
> The riscv_vector.h must be included when leverage intrinisc type(s) and
> API(s).  And the scope of this attribute should not excced the function
> body.  Meanwhile, to make rvv types and API(s) available for this attribute,
> include riscv_vector.h will not report error for now if v is not present
> in march.
>
> Below test are passed for this patch:
> * The riscv fully regression test.
>
> gcc/ChangeLog:
>
>         * config/riscv/riscv-c.cc (riscv_pragma_intrinsic): Remove error
>         when V is disabled and init the RVV types and intrinic APIs.
>         * config/riscv/riscv-vector-builtins.cc (expand_builtin): Report
>         error if V ext is disabled.
>         * config/riscv/riscv.cc (riscv_return_value_is_vector_type_p):
>         Ditto.
>         (riscv_arguments_is_vector_type_p): Ditto.
>         (riscv_vector_cc_function_p): Ditto.
>         * config/riscv/riscv_vector.h: Remove error if V is disable.
>
> gcc/testsuite/ChangeLog:
>
>         * gcc.target/riscv/rvv/base/pragma-1.c: Remove.
>         * gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-1.c: New test.
>         * gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-2.c: New test.
>         * gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-3.c: New test.
>         * gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-4.c: New test.
>         * gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-5.c: New test.
>         * gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-6.c: New test.
>         * gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-7.c: New test.
>         * gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-8.c: New test.
>
> Signed-off-by: Pan Li <pan2.li@intel.com>
> ---
>  gcc/config/riscv/riscv-c.cc                   | 18 +++++++----
>  gcc/config/riscv/riscv-vector-builtins.cc     |  5 ++++
>  gcc/config/riscv/riscv.cc                     | 30 ++++++++++++++++---
>  gcc/config/riscv/riscv_vector.h               |  4 ---
>  .../gcc.target/riscv/rvv/base/pragma-1.c      |  4 ---
>  .../target_attribute_v_with_intrinsic-1.c     |  5 ++++
>  .../target_attribute_v_with_intrinsic-2.c     | 18 +++++++++++
>  .../target_attribute_v_with_intrinsic-3.c     | 13 ++++++++
>  .../target_attribute_v_with_intrinsic-4.c     | 10 +++++++
>  .../target_attribute_v_with_intrinsic-5.c     | 12 ++++++++
>  .../target_attribute_v_with_intrinsic-6.c     | 12 ++++++++
>  .../target_attribute_v_with_intrinsic-7.c     |  9 ++++++
>  .../target_attribute_v_with_intrinsic-8.c     | 23 ++++++++++++++
>  13 files changed, 145 insertions(+), 18 deletions(-)
>  delete mode 100644 gcc/testsuite/gcc.target/riscv/rvv/base/pragma-1.c
>  create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-1.c
>  create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-2.c
>  create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-3.c
>  create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-4.c
>  create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-5.c
>  create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-6.c
>  create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-7.c
>  create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-8.c
>
> diff --git a/gcc/config/riscv/riscv-c.cc b/gcc/config/riscv/riscv-c.cc
> index edb866d51e4..01314037461 100644
> --- a/gcc/config/riscv/riscv-c.cc
> +++ b/gcc/config/riscv/riscv-c.cc
> @@ -201,14 +201,20 @@ riscv_pragma_intrinsic (cpp_reader *)
>    if (strcmp (name, "vector") == 0
>        || strcmp (name, "xtheadvector") == 0)
>      {
> -      if (!TARGET_VECTOR)
> +      if (TARGET_VECTOR)
> +       riscv_vector::handle_pragma_vector ();
> +      else /* Indicates riscv_vector.h is included but v is missing in arch  */
>         {
> -         error ("%<#pragma riscv intrinsic%> option %qs needs 'V' or "
> -                "'XTHEADVECTOR' extension enabled",
> -                name);
> -         return;
> +         /* To make the the rvv types and intrinsic API available for the
> +            target("arch=+v") attribute,  we need to temporally enable the
> +            TARGET_VECTOR, and disable it after all initialized.  */
> +         target_flags |= MASK_VECTOR;
> +
> +         riscv_vector::init_builtins ();
> +         riscv_vector::handle_pragma_vector ();
> +
> +         target_flags &= ~MASK_VECTOR;
>         }
> -      riscv_vector::handle_pragma_vector ();
>      }
>    else
>      error ("unknown %<#pragma riscv intrinsic%> option %qs", name);
> diff --git a/gcc/config/riscv/riscv-vector-builtins.cc b/gcc/config/riscv/riscv-vector-builtins.cc
> index c5881a501d1..e07373d8b57 100644
> --- a/gcc/config/riscv/riscv-vector-builtins.cc
> +++ b/gcc/config/riscv/riscv-vector-builtins.cc
> @@ -4586,6 +4586,11 @@ rtx
>  expand_builtin (unsigned int code, tree exp, rtx target)
>  {
>    registered_function &rfn = *(*registered_functions)[code];
> +
> +  if (!TARGET_VECTOR)
> +    error_at (EXPR_LOCATION (exp),
> +             "builtin function %qE requires the V ISA extension", exp);
> +
>    return function_expander (rfn.instance, rfn.decl, exp, target).expand ();
>  }
>
> diff --git a/gcc/config/riscv/riscv.cc b/gcc/config/riscv/riscv.cc
> index 6d11576a8fd..fe9976bfffe 100644
> --- a/gcc/config/riscv/riscv.cc
> +++ b/gcc/config/riscv/riscv.cc
> @@ -5467,7 +5467,15 @@ riscv_return_value_is_vector_type_p (const_tree fntype)
>  {
>    tree return_type = TREE_TYPE (fntype);
>
> -  return riscv_vector_type_p (return_type);
> +  if (riscv_vector_type_p (return_type))
> +    {
> +      if (!TARGET_VECTOR)
> +       error_at (input_location,
> +                 "return type %qT requires the V ISA extension", return_type);
> +      return true;
> +    }
> +  else
> +    return false;
>  }
>
>  /* Return true if a function with type FNTYPE takes arguments in
> @@ -5481,7 +5489,13 @@ riscv_arguments_is_vector_type_p (const_tree fntype)
>      {
>        tree arg_type = TREE_VALUE (chain);
>        if (riscv_vector_type_p (arg_type))
> -       return true;
> +       {
> +         if (!TARGET_VECTOR)
> +           error_at (input_location,
> +                     "argument type %qT requires the V ISA extension",
> +                     arg_type);
> +         return true;
> +       }
>      }
>
>    return false;
> @@ -5493,8 +5507,16 @@ riscv_arguments_is_vector_type_p (const_tree fntype)
>  static bool
>  riscv_vector_cc_function_p (const_tree fntype)
>  {
> -  return lookup_attribute ("vector_cc", TYPE_ATTRIBUTES (fntype)) != NULL_TREE
> -        || lookup_attribute ("riscv_vector_cc", TYPE_ATTRIBUTES (fntype)) != NULL_TREE;
> +  tree attr = TYPE_ATTRIBUTES (fntype);
> +  bool vector_cc_p = lookup_attribute ("vector_cc", attr) != NULL_TREE
> +    || lookup_attribute ("riscv_vector_cc", attr) != NULL_TREE;
> +
> +  if (vector_cc_p && !TARGET_VECTOR)
> +    error_at (input_location,
> +             "function attribute %qs requires the V ISA extension",
> +             "riscv_vector_cc");
> +
> +  return vector_cc_p;
>  }
>
>  /* Implement TARGET_FNTYPE_ABI.  */
> diff --git a/gcc/config/riscv/riscv_vector.h b/gcc/config/riscv/riscv_vector.h
> index c2fc4b35242..aa0c3aa69c0 100644
> --- a/gcc/config/riscv/riscv_vector.h
> +++ b/gcc/config/riscv/riscv_vector.h
> @@ -28,9 +28,6 @@
>  #include <stdint.h>
>  #include <stddef.h>
>
> -#ifndef __riscv_vector
> -#error "Vector intrinsics require the vector extension."
> -#else
>  #ifdef __cplusplus
>  extern "C" {
>  #endif
> @@ -45,5 +42,4 @@ extern "C" {
>  #ifdef __cplusplus
>  }
>  #endif // __cplusplus
> -#endif // __riscv_vector
>  #endif // __RISCV_VECTOR_H
> diff --git a/gcc/testsuite/gcc.target/riscv/rvv/base/pragma-1.c b/gcc/testsuite/gcc.target/riscv/rvv/base/pragma-1.c
> deleted file mode 100644
> index ef329e30785..00000000000
> --- a/gcc/testsuite/gcc.target/riscv/rvv/base/pragma-1.c
> +++ /dev/null
> @@ -1,4 +0,0 @@
> -/* { dg-do compile } */
> -/* { dg-options "-O3 -march=rv32gc -mabi=ilp32d" } */
> -
> -#pragma riscv intrinsic "vector" /* { dg-error {#pragma riscv intrinsic' option 'vector' needs 'V' or 'XTHEADVECTOR' extension enabled} } */
> diff --git a/gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-1.c b/gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-1.c
> new file mode 100644
> index 00000000000..dfe8191021e
> --- /dev/null
> +++ b/gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-1.c
> @@ -0,0 +1,5 @@
> +/* Test that we do not have error when compile */
> +/* { dg-do compile } */
> +/* { dg-options "-march=rv64gc -mabi=lp64d -O3" } */
> +
> +#include "riscv_vector.h"
> diff --git a/gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-2.c b/gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-2.c
> new file mode 100644
> index 00000000000..9992347fe6b
> --- /dev/null
> +++ b/gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-2.c
> @@ -0,0 +1,18 @@
> +/* Test that we do not have error when compile */
> +/* { dg-do compile } */
> +/* { dg-options "-march=rv64gc -mabi=lp64d -O3" } */
> +
> +#include "riscv_vector.h"
> +
> +vint32m1_t
> +__attribute__((target("arch=+v")))
> +test_1 (vint32m1_t a, vint32m1_t b, size_t vl)
> +{
> +  return __riscv_vadd_vv_i32m1 (a, b, vl);
> +}
> +
> +void
> +test_2 ()
> +{
> +  vint32m1_t a;
> +}
> diff --git a/gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-3.c b/gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-3.c
> new file mode 100644
> index 00000000000..590343ddbfd
> --- /dev/null
> +++ b/gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-3.c
> @@ -0,0 +1,13 @@
> +/* { dg-do compile } */
> +/* { dg-options "-march=rv64gc -mabi=lp64d -O3 -Wno-implicit-int" } */
> +
> +#include "riscv_vector.h"
> +
> +vint32m1_t
> +__attribute__((target("arch=+zbb")))
> +test_1 (vint32m1_t a, vint32m1_t b, size_t vl)
> +{
> +  return __riscv_vadd_vv_i32m1 (a, b, vl);
> +}
> +
> +/* { dg-error "return type 'vint32m1_t' requires the V ISA extension" "" { target { "riscv*-*-*" } } 0 } */
> diff --git a/gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-4.c b/gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-4.c
> new file mode 100644
> index 00000000000..0acece7640c
> --- /dev/null
> +++ b/gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-4.c
> @@ -0,0 +1,10 @@
> +/* { dg-do compile } */
> +/* { dg-options "-march=rv64gc -mabi=lp64d -O3" } */
> +
> +#include "riscv_vector.h"
> +
> +void
> +test_1 (vint32m1_t a) /* { dg-error {argument type 'vint32m1_t' requires the V ISA extension} } */
> +{
> +  return;
> +}
> diff --git a/gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-5.c b/gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-5.c
> new file mode 100644
> index 00000000000..2dc4217ff32
> --- /dev/null
> +++ b/gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-5.c
> @@ -0,0 +1,12 @@
> +/* { dg-do compile } */
> +/* { dg-options "-march=rv64gc -mabi=lp64d -O3" } */
> +
> +#include "riscv_vector.h"
> +
> +vint32m1_t test_1 ()
> +{
> +  vint32m1_t a;
> +  return a;
> +}
> +
> +/* { dg-error "return type 'vint32m1_t' requires the V ISA extension" "" { target { "riscv*-*-*" } } 0 } */
> diff --git a/gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-6.c b/gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-6.c
> new file mode 100644
> index 00000000000..562bb509e9e
> --- /dev/null
> +++ b/gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-6.c
> @@ -0,0 +1,12 @@
> +/* { dg-do compile } */
> +/* { dg-options "-march=rv64gc -mabi=lp64d -O3" } */
> +
> +#include "riscv_vector.h"
> +
> +int
> +__attribute__((riscv_vector_cc))
> +test_1 (int a)
> +{
> +  return a + 1;
> +}
> +/* { dg-error "function attribute 'riscv_vector_cc' requires the V ISA extension" "" { target { "riscv*-*-*" } } 0 } */
> diff --git a/gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-7.c b/gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-7.c
> new file mode 100644
> index 00000000000..520b2e59fae
> --- /dev/null
> +++ b/gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-7.c
> @@ -0,0 +1,9 @@
> +/* { dg-do compile } */
> +/* { dg-options "-march=rv64gc -mabi=lp64d -O3" } */
> +
> +#include "riscv_vector.h"
> +
> +size_t test_1 (size_t vl)
> +{
> +  return __riscv_vsetvl_e8m4 (vl); /* { dg-error {builtin function '__riscv_vsetvl_e8m4\(vl\)' requires the V ISA extension} } */
> +}
> diff --git a/gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-8.c b/gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-8.c
> new file mode 100644
> index 00000000000..9032d9d0b43
> --- /dev/null
> +++ b/gcc/testsuite/gcc.target/riscv/rvv/base/target_attribute_v_with_intrinsic-8.c
> @@ -0,0 +1,23 @@
> +/* { dg-do compile } */
> +/* { dg-options "-march=rv64gc -mabi=lp64d -O3" } */
> +
> +#include "riscv_vector.h"
> +
> +vint32m1_t
> +__attribute__((target("arch=+v")))
> +test_1 (vint32m1_t a, vint32m1_t b, size_t vl)
> +{
> +  return __riscv_vadd_vv_i32m1 (a, b, vl);
> +}
> +
> +void
> +test_2 ()
> +{
> +  vint32m1_t a;
> +}
> +
> +size_t
> +test_3 (size_t vl)
> +{
> +  return __riscv_vsetvl_e8m4 (vl); /* { dg-error {builtin function '__riscv_vsetvl_e8m4\(vl\)' requires the V ISA extension} } */
> +}
> --
> 2.34.1
>

../../gcc/config/riscv/riscv-vector-builtins.cc: In function 'rtx_def* riscv_vector::expand_builtin(unsigned int, tree, rtx)':
../../gcc/config/riscv/riscv-vector-builtins.cc:4592:16: error: misspelled term 'builtin function' in format; use 'built-in function' instead [-Werror=format-diag]
 4592 |               "builtin function %qE requires the V ISA extension", exp);
      |                ^~~~~~~~~~~~~~~~
cc1plus: all warnings being treated as errors
make[3]: *** [../../gcc/config/riscv/t-riscv:28: riscv-vector-builtins.o] Error 1