From: Yanzhang Wang <yanzhang.w...@intel.com>
This patch adds support to check function's argument or return is vector type
and throw warning if yes.
There're two exceptions,
- The vector_size attribute.
- The intrinsic functions.
gcc/ChangeLog:
* config/riscv/riscv-protos.h (riscv_init_cumulative_args): Set
warning flag if func is not builtin
* config/riscv/riscv.cc
(riscv_scalable_vector_type_p): Determine whether the type is scalable
vector.
(riscv_arg_has_vector): Determine whether the arg is vector type.
(riscv_pass_in_vector_p): Check the vector type param is passed by
value.
(riscv_init_cumulative_args): The same as header.
(riscv_get_arg_info): Add the checking.
(riscv_function_value): Check the func return and set warning flag
* config/riscv/riscv.h (INIT_CUMULATIVE_ARGS): Add a flag to
determine whether warning psabi or not.
gcc/testsuite/ChangeLog:
* gcc.target/riscv/vector-abi-1.c: New test.
* gcc.target/riscv/vector-abi-2.c: New test.
* gcc.target/riscv/vector-abi-3.c: New test.
* gcc.target/riscv/vector-abi-4.c: New test.
* gcc.target/riscv/vector-abi-5.c: New test.
* gcc.target/riscv/vector-abi-6.c: New test.
Signed-off-by: Yanzhang Wang <yanzhang.w...@intel.com>
Co-authored-by: Kito Cheng <kito.ch...@sifive.com>
---
gcc/config/riscv/riscv-protos.h | 2 +
gcc/config/riscv/riscv.cc | 112 +++++++++++++++++-
gcc/config/riscv/riscv.h | 5 +-
gcc/testsuite/gcc.target/riscv/vector-abi-1.c | 14 +++
gcc/testsuite/gcc.target/riscv/vector-abi-2.c | 15 +++
gcc/testsuite/gcc.target/riscv/vector-abi-3.c | 14 +++
gcc/testsuite/gcc.target/riscv/vector-abi-4.c | 16 +++
gcc/testsuite/gcc.target/riscv/vector-abi-5.c | 15 +++
gcc/testsuite/gcc.target/riscv/vector-abi-6.c | 20 ++++
9 files changed, 211 insertions(+), 2 deletions(-)
create mode 100644 gcc/testsuite/gcc.target/riscv/vector-abi-1.c
create mode 100644 gcc/testsuite/gcc.target/riscv/vector-abi-2.c
create mode 100644 gcc/testsuite/gcc.target/riscv/vector-abi-3.c
create mode 100644 gcc/testsuite/gcc.target/riscv/vector-abi-4.c
create mode 100644 gcc/testsuite/gcc.target/riscv/vector-abi-5.c
create mode 100644 gcc/testsuite/gcc.target/riscv/vector-abi-6.c
diff --git a/gcc/config/riscv/riscv-protos.h b/gcc/config/riscv/riscv-protos.h
index e41f65a0894..d8f42778565 100644
--- a/gcc/config/riscv/riscv-protos.h
+++ b/gcc/config/riscv/riscv-protos.h
@@ -235,4 +235,6 @@ extern const char*
th_mempair_output_move (rtx[4], bool, machine_mode, RTX_CODE);
#endif
+void riscv_init_cumulative_args (CUMULATIVE_ARGS *, tree, rtx, tree, int);
+
#endif /* ! GCC_RISCV_PROTOS_H */
diff --git a/gcc/config/riscv/riscv.cc b/gcc/config/riscv/riscv.cc
index 76eee4a55e9..3286656ecba 100644
--- a/gcc/config/riscv/riscv.cc
+++ b/gcc/config/riscv/riscv.cc
@@ -3728,6 +3728,99 @@ riscv_pass_fpr_pair (machine_mode mode, unsigned regno1,
GEN_INT (offset2))));
}
+/* Use the TYPE_SIZE to distinguish the type with vector_size attribute and
+ intrinsic vector type. Because we can't get the decl for the params. */
+
+static bool
+riscv_scalable_vector_type_p (const_tree type)
+{
+ tree size = TYPE_SIZE (type);
+ if (size && TREE_CODE (size) == INTEGER_CST)
+ return false;
+
+ /* For the data type like vint32m1_t, the size code is POLY_INT_CST. */
+ return true;
+}
+
+static bool
+riscv_arg_has_vector (const_tree type)
+{
+ bool is_vector = false;
+
+ switch (TREE_CODE (type))
+ {
+ case RECORD_TYPE:
+ if (!COMPLETE_TYPE_P (type))
+ break;
+
+ for (tree f = TYPE_FIELDS (type); f; f = DECL_CHAIN (f))
+ if (TREE_CODE (f) == FIELD_DECL)
+ {
+ tree field_type = TREE_TYPE (f);
+ if (!TYPE_P (field_type))
+ break;
+
+ /* Ignore it if it's fixed length vector. */
+ if (VECTOR_TYPE_P (field_type))
+ is_vector = riscv_scalable_vector_type_p (field_type);
+ else
+ is_vector = riscv_arg_has_vector (field_type);
+ }
+
+ break;
+
+ case VECTOR_TYPE:
+ is_vector = riscv_scalable_vector_type_p (type);
+ break;
+
+ default:
+ is_vector = false;
+ break;
+ }
+
+ return is_vector;
+}
+
+/* Pass the type to check whether it's a vector type or contains vector type.
+ Only check the value type and no checking for vector pointer type. */
+
+static void
+riscv_pass_in_vector_p (const_tree type)
+{
+ static int warned = 0;
+
+ if (type && riscv_arg_has_vector (type) && !warned)
+ {
+ warning (OPT_Wpsabi, "ABI for the scalable vector type is currently in "
+ "experimental stage and may changes in the upcoming version of "
+ "GCC.");
+ warned = 1;
+ }
+}
+
+/* Initialize a variable CUM of type CUMULATIVE_ARGS
+ for a call to a function whose data type is FNTYPE.
+ For a library call, FNTYPE is 0. */
+
+void
+riscv_init_cumulative_args (CUMULATIVE_ARGS *cum,
+ tree fntype,
+ rtx libname,
+ tree fndecl,
+ int caller)
+{
+ memset (cum, 0, sizeof (*cum));
+
+ if (fndecl)
+ {
+ const tree_function_decl &fn
+ = FUNCTION_DECL_CHECK (fndecl)->function_decl;
+
+ if (fn.built_in_class == NOT_BUILT_IN)
+ cum->rvv_psabi_warning = 1;
+ }
+}
+
/* Fill INFO with information about a single argument, and return an
RTL pattern to pass or return the argument. CUM is the cumulative
state for earlier arguments. MODE is the mode of this argument and
@@ -3812,6 +3905,12 @@ riscv_get_arg_info (struct riscv_arg_info *info, const
CUMULATIVE_ARGS *cum,
}
}
+ if (cum->rvv_psabi_warning)
+ {
+ /* Only check existing of vector type. */
+ riscv_pass_in_vector_p (type);
+ }
+
/* Work out the size of the argument. */
num_bytes = type ? int_size_in_bytes (type) : GET_MODE_SIZE
(mode).to_constant ();
num_words = (num_bytes + UNITS_PER_WORD - 1) / UNITS_PER_WORD;
@@ -3899,7 +3998,18 @@ riscv_function_value (const_tree type, const_tree func,
machine_mode mode)
}
memset (&args, 0, sizeof args);
- return riscv_get_arg_info (&info, &args, mode, type, true, true);
+
+ const_tree arg_type = type;
+ if (func && DECL_RESULT (func))
+ {
+ const tree_function_decl &fn = FUNCTION_DECL_CHECK (func)->function_decl;
+ if (fn.built_in_class == NOT_BUILT_IN)
+ args.rvv_psabi_warning = 1;
+
+ arg_type = TREE_TYPE (DECL_RESULT (func));
+ }
+
+ return riscv_get_arg_info (&info, &args, mode, arg_type, true, true);
}
/* Implement TARGET_PASS_BY_REFERENCE. */
diff --git a/gcc/config/riscv/riscv.h b/gcc/config/riscv/riscv.h
index 66fb07d6652..cb10b63ef10 100644
--- a/gcc/config/riscv/riscv.h
+++ b/gcc/config/riscv/riscv.h
@@ -671,6 +671,8 @@ typedef struct {
/* Number of floating-point registers used so far, likewise. */
unsigned int num_fprs;
+
+ int rvv_psabi_warning;
} CUMULATIVE_ARGS;
/* Initialize a variable CUM of type CUMULATIVE_ARGS
@@ -678,7 +680,8 @@ typedef struct {
For a library call, FNTYPE is 0. */
#define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT, N_NAMED_ARGS) \
- memset (&(CUM), 0, sizeof (CUM))
+ riscv_init_cumulative_args (&(CUM), (FNTYPE), (LIBNAME), (INDIRECT), \
+ (N_NAMED_ARGS) != -1)
#define EPILOGUE_USES(REGNO) riscv_epilogue_uses (REGNO)
diff --git a/gcc/testsuite/gcc.target/riscv/vector-abi-1.c
b/gcc/testsuite/gcc.target/riscv/vector-abi-1.c
new file mode 100644
index 00000000000..969f14277a4
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/vector-abi-1.c
@@ -0,0 +1,14 @@
+/* { dg-do compile } */
+/* { dg-options "-O0 -march=rv64gcv -mabi=lp64d" } */
+
+#include "riscv_vector.h"
+
+void
+fun (vint32m1_t a) { } /* { dg-warning "the scalable vector type" } */
+
+void
+bar ()
+{
+ vint32m1_t a;
+ fun (a);
+}
diff --git a/gcc/testsuite/gcc.target/riscv/vector-abi-2.c
b/gcc/testsuite/gcc.target/riscv/vector-abi-2.c
new file mode 100644
index 00000000000..63d97d30fc5
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/vector-abi-2.c
@@ -0,0 +1,15 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv64gcv -mabi=lp64d" } */
+/* { dg-skip-if "" { *-*-* } { "-flto" } { "" } } */
+
+#include "riscv_vector.h"
+
+vint32m1_t
+fun (vint32m1_t* a) { return *a; } /* { dg-warning "the scalable vector
type" } */
+
+void
+bar ()
+{
+ vint32m1_t a;
+ fun (&a);
+}
diff --git a/gcc/testsuite/gcc.target/riscv/vector-abi-3.c
b/gcc/testsuite/gcc.target/riscv/vector-abi-3.c
new file mode 100644
index 00000000000..90ece60cc6f
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/vector-abi-3.c
@@ -0,0 +1,14 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv64gcv -mabi=lp64d" } */
+
+#include "riscv_vector.h"
+
+vint32m1_t*
+fun (vint32m1_t* a) { return a; } /* { dg-bogus "the scalable vector type" }
*/
+
+void
+bar ()
+{
+ vint32m1_t a;
+ fun (&a);
+}
diff --git a/gcc/testsuite/gcc.target/riscv/vector-abi-4.c
b/gcc/testsuite/gcc.target/riscv/vector-abi-4.c
new file mode 100644
index 00000000000..ecf6d4cc26b
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/vector-abi-4.c
@@ -0,0 +1,16 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv64gcv -mabi=lp64d" } */
+
+#include "riscv_vector.h"
+
+typedef int v4si __attribute__ ((vector_size (16)));
+
+v4si
+fun (v4si a) { return a; } /* { dg-bogus "the scalable vector type" } */
+
+void
+bar ()
+{
+ v4si a;
+ fun (a);
+}
diff --git a/gcc/testsuite/gcc.target/riscv/vector-abi-5.c
b/gcc/testsuite/gcc.target/riscv/vector-abi-5.c
new file mode 100644
index 00000000000..6053e0783b6
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/vector-abi-5.c
@@ -0,0 +1,15 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv64gcv -mabi=lp64d" } */
+
+typedef int v4si __attribute__ ((vector_size (16)));
+struct A { int a; v4si b; };
+
+void
+fun (struct A a) {} /* { dg-bogus "the scalable vector type" } */
+
+void
+bar ()
+{
+ struct A a;
+ fun (a);
+}
diff --git a/gcc/testsuite/gcc.target/riscv/vector-abi-6.c
b/gcc/testsuite/gcc.target/riscv/vector-abi-6.c
new file mode 100644
index 00000000000..63bc4a89805
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/vector-abi-6.c
@@ -0,0 +1,20 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv64gcv -mabi=lp64d" } */
+#include "riscv_vector.h"
+
+void
+foo(int32_t *in1, int32_t *in2, int32_t *in3, int32_t *out,
+ size_t n, int cond) {
+ size_t vl;
+ if (cond)
+ vl = __riscv_vsetvlmax_e32m1();
+ else
+ vl = __riscv_vsetvlmax_e16mf2();
+ for (size_t i = 0; i < n; i += 1)
+ {
+ vint32m1_t a = __riscv_vle32_v_i32m1(in1, vl); /* { dg-bogus "the
scalable vector type" } */
+ vint32m1_t b = __riscv_vle32_v_i32m1_tu(a, in2, vl);
+ vint32m1_t c = __riscv_vle32_v_i32m1_tu(b, in3, vl);
+ __riscv_vse32_v_i32m1(out, c, vl);
+ }
+}
--
2.40.1
