[PATCH 1/2] RISC-V: add option -m(no-)autovec-segment

[Patrick O'Neill <patrick@rivosinc.com>]

From: Greg McGary <gkm@rivosinc.com>

Add option -m(no-)autovec-segment to enable/disable autovectorizer
from emitting vector segment load/store instructions. This is useful for
performance experiments.

gcc/ChangeLog:
	* config/riscv/autovec.md (vec_mask_len_load_lanes, vec_mask_len_store_lanes):
	  Predicate with TARGET_VECTOR_AUTOVEC_SEGMENT
	* gcc/config/riscv/riscv-opts.h (TARGET_VECTOR_AUTOVEC_SEGMENT): New macro.
	* gcc/config/riscv/riscv.opt (-m(no-)autovec-segment): New option.
	* gcc/tree-vect-stmts.cc (gcc/tree-vect-stmts.cc): Prevent divide-by-zero.
	* testsuite/gcc.target/riscv/rvv/autovec/struct/*_noseg*.c,
	testsuite/gcc.target/riscv/rvv/autovec/no-segment.c: New tests.
---
 gcc/config/riscv/autovec.md                   |  4 +-
 gcc/config/riscv/riscv-opts.h                 |  5 ++
 gcc/config/riscv/riscv.opt                    |  4 ++
 .../gcc.target/riscv/rvv/autovec/no-segment.c | 61 +++++++++++++++++++
 .../autovec/struct/mask_struct_load_noseg-1.c |  6 ++
 .../autovec/struct/mask_struct_load_noseg-2.c |  6 ++
 .../autovec/struct/mask_struct_load_noseg-3.c |  6 ++
 .../autovec/struct/mask_struct_load_noseg-4.c |  6 ++
 .../autovec/struct/mask_struct_load_noseg-5.c |  6 ++
 .../autovec/struct/mask_struct_load_noseg-6.c |  6 ++
 .../autovec/struct/mask_struct_load_noseg-7.c |  6 ++
 .../struct/mask_struct_load_noseg_run-1.c     |  4 ++
 .../struct/mask_struct_load_noseg_run-2.c     |  4 ++
 .../struct/mask_struct_load_noseg_run-3.c     |  4 ++
 .../struct/mask_struct_load_noseg_run-4.c     |  4 ++
 .../struct/mask_struct_load_noseg_run-5.c     |  4 ++
 .../struct/mask_struct_load_noseg_run-6.c     |  4 ++
 .../struct/mask_struct_load_noseg_run-7.c     |  4 ++
 .../struct/mask_struct_store_noseg-1.c        |  6 ++
 .../struct/mask_struct_store_noseg-2.c        |  6 ++
 .../struct/mask_struct_store_noseg-3.c        |  6 ++
 .../struct/mask_struct_store_noseg-4.c        |  6 ++
 .../struct/mask_struct_store_noseg-5.c        |  6 ++
 .../struct/mask_struct_store_noseg-6.c        |  6 ++
 .../struct/mask_struct_store_noseg-7.c        |  6 ++
 .../struct/mask_struct_store_noseg_run-1.c    |  4 ++
 .../struct/mask_struct_store_noseg_run-2.c    |  4 ++
 .../struct/mask_struct_store_noseg_run-3.c    |  4 ++
 .../struct/mask_struct_store_noseg_run-4.c    |  4 ++
 .../struct/mask_struct_store_noseg_run-5.c    |  4 ++
 .../struct/mask_struct_store_noseg_run-6.c    |  4 ++
 .../struct/mask_struct_store_noseg_run-7.c    |  4 ++
 .../rvv/autovec/struct/struct_vect_noseg-1.c  |  8 +++
 .../rvv/autovec/struct/struct_vect_noseg-10.c |  7 +++
 .../rvv/autovec/struct/struct_vect_noseg-11.c |  7 +++
 .../rvv/autovec/struct/struct_vect_noseg-12.c |  7 +++
 .../rvv/autovec/struct/struct_vect_noseg-13.c |  6 ++
 .../rvv/autovec/struct/struct_vect_noseg-14.c |  6 ++
 .../rvv/autovec/struct/struct_vect_noseg-15.c |  6 ++
 .../rvv/autovec/struct/struct_vect_noseg-16.c |  6 ++
 .../rvv/autovec/struct/struct_vect_noseg-17.c |  6 ++
 .../rvv/autovec/struct/struct_vect_noseg-18.c |  6 ++
 .../rvv/autovec/struct/struct_vect_noseg-2.c  |  8 +++
 .../rvv/autovec/struct/struct_vect_noseg-3.c  |  8 +++
 .../rvv/autovec/struct/struct_vect_noseg-4.c  |  8 +++
 .../rvv/autovec/struct/struct_vect_noseg-5.c  |  8 +++
 .../rvv/autovec/struct/struct_vect_noseg-6.c  |  7 +++
 .../rvv/autovec/struct/struct_vect_noseg-7.c  |  7 +++
 .../rvv/autovec/struct/struct_vect_noseg-8.c  |  7 +++
 .../rvv/autovec/struct/struct_vect_noseg-9.c  |  7 +++
 .../autovec/struct/struct_vect_noseg_run-1.c  |  4 ++
 .../autovec/struct/struct_vect_noseg_run-10.c |  4 ++
 .../autovec/struct/struct_vect_noseg_run-11.c |  4 ++
 .../autovec/struct/struct_vect_noseg_run-12.c |  4 ++
 .../autovec/struct/struct_vect_noseg_run-13.c |  4 ++
 .../autovec/struct/struct_vect_noseg_run-14.c |  4 ++
 .../autovec/struct/struct_vect_noseg_run-15.c |  4 ++
 .../autovec/struct/struct_vect_noseg_run-16.c |  4 ++
 .../autovec/struct/struct_vect_noseg_run-17.c |  4 ++
 .../autovec/struct/struct_vect_noseg_run-18.c |  4 ++
 .../autovec/struct/struct_vect_noseg_run-2.c  |  4 ++
 .../autovec/struct/struct_vect_noseg_run-3.c  |  4 ++
 .../autovec/struct/struct_vect_noseg_run-4.c  |  4 ++
 .../autovec/struct/struct_vect_noseg_run-5.c  |  4 ++
 .../autovec/struct/struct_vect_noseg_run-6.c  |  4 ++
 .../autovec/struct/struct_vect_noseg_run-7.c  |  4 ++
 .../autovec/struct/struct_vect_noseg_run-8.c  |  4 ++
 .../autovec/struct/struct_vect_noseg_run-9.c  |  4 ++
 gcc/tree-vect-stmts.cc                        |  3 +-
 69 files changed, 411 insertions(+), 3 deletions(-)
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/no-segment.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_load_noseg-1.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_load_noseg-2.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_load_noseg-3.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_load_noseg-4.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_load_noseg-5.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_load_noseg-6.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_load_noseg-7.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_load_noseg_run-1.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_load_noseg_run-2.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_load_noseg_run-3.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_load_noseg_run-4.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_load_noseg_run-5.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_load_noseg_run-6.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_load_noseg_run-7.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_store_noseg-1.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_store_noseg-2.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_store_noseg-3.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_store_noseg-4.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_store_noseg-5.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_store_noseg-6.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_store_noseg-7.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_store_noseg_run-1.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_store_noseg_run-2.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_store_noseg_run-3.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_store_noseg_run-4.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_store_noseg_run-5.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_store_noseg_run-6.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_store_noseg_run-7.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-1.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-10.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-11.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-12.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-13.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-14.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-15.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-16.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-17.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-18.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-2.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-3.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-4.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-5.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-6.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-7.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-8.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-9.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-1.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-10.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-11.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-12.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-13.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-14.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-15.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-16.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-17.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-18.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-2.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-3.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-4.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-5.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-6.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-7.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-8.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-9.c

diff --git a/gcc/config/riscv/autovec.md b/gcc/config/riscv/autovec.md
index 87d4171bc89..2a7131de749 100644
--- a/gcc/config/riscv/autovec.md
+++ b/gcc/config/riscv/autovec.md
@@ -282,7 +282,7 @@
    (match_operand:<VM> 2 "vector_mask_operand")
    (match_operand 3 "autovec_length_operand")
    (match_operand 4 "const_0_operand")]
-  "TARGET_VECTOR"
+  "TARGET_VECTOR_AUTOVEC_SEGMENT"
   {
     riscv_vector::expand_lanes_load_store (operands, true);
     DONE;
@@ -295,7 +295,7 @@
    (match_operand:<VM> 2 "vector_mask_operand")
    (match_operand 3 "autovec_length_operand")
    (match_operand 4 "const_0_operand")]
-  "TARGET_VECTOR"
+  "TARGET_VECTOR_AUTOVEC_SEGMENT"
   {
     riscv_vector::expand_lanes_load_store (operands, false);
     DONE;
diff --git a/gcc/config/riscv/riscv-opts.h b/gcc/config/riscv/riscv-opts.h
index 1b2dd5757a8..bcd8731a1a9 100644
--- a/gcc/config/riscv/riscv-opts.h
+++ b/gcc/config/riscv/riscv-opts.h
@@ -160,4 +160,9 @@ enum riscv_tls_type {
   TLS_DESCRIPTORS
 };
 
+/* On some microarchitectures, vector segment loads and stores are excessively
+   expensive, so predicate the generation of those instrunctions.  */
+#define TARGET_VECTOR_AUTOVEC_SEGMENT                                          \
+  (TARGET_VECTOR && riscv_mautovec_segment)
+
 #endif /* ! GCC_RISCV_OPTS_H */
diff --git a/gcc/config/riscv/riscv.opt b/gcc/config/riscv/riscv.opt
index 87f58332016..b92cd458b74 100644
--- a/gcc/config/riscv/riscv.opt
+++ b/gcc/config/riscv/riscv.opt
@@ -628,3 +628,7 @@ Specify TLS dialect.
 mfence-tso
 Target Var(TARGET_FENCE_TSO) Init(1)
 Specifies whether the fence.tso instruction should be used.
+
+mautovec-segment
+Target Integer Var(riscv_mautovec_segment) Init(1)
+Enable (default) or disable generation of vector segment load/store instructions.
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/no-segment.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/no-segment.c
new file mode 100644
index 00000000000..b0feccf853f
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/no-segment.c
@@ -0,0 +1,61 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv64gcv -mabi=lp64d --param=riscv-autovec-preference=scalable -O3 -mno-autovec-segment" } */
+
+enum e { c, d };
+enum g { f };
+
+struct h
+{
+  float x, w;
+};
+
+struct k
+{
+  short z, y, i, j;
+};
+
+long r;
+struct h m, p;
+struct k *q;
+
+short
+l (float s)
+{
+  if (s <= 0.0f)
+    return 0;
+
+  if (s >= 5)
+    return 5;
+
+  return s;
+}
+
+struct n
+{
+  enum g colorspace;
+};
+
+struct n o (struct k *s, struct h *t)
+{
+  t->w = s->z;
+}
+
+void
+ClutImageChannel (struct n *s, enum e t)
+{
+
+  while (s)
+    for (; r; r++)
+      {
+	o (q, &p);
+
+	if (t & d)
+	  q->y = (&m + q->y)->x;
+
+	if (t)
+	  q->z = l ((&m + q->z)->w);
+
+	if (s->colorspace)
+	  q++;
+      }
+}
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_load_noseg-1.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_load_noseg-1.c
new file mode 100644
index 00000000000..277761263f5
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_load_noseg-1.c
@@ -0,0 +1,6 @@
+/* { dg-do compile } */
+/* { dg-additional-options "-std=c99 -march=rv32gcv_zvfh -mabi=ilp32d --param=riscv-autovec-preference=scalable -fno-vect-cost-model -mno-autovec-segment" } */
+
+#include "mask_struct_load-1.c"
+
+/* { dg-final { scan-assembler-not {v[ls]seg[2-8]e[123468]+\.v} } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_load_noseg-2.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_load_noseg-2.c
new file mode 100644
index 00000000000..addeba0033d
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_load_noseg-2.c
@@ -0,0 +1,6 @@
+/* { dg-do compile } */
+/* { dg-additional-options "-std=c99 -march=rv32gcv_zvfh -mabi=ilp32d --param=riscv-autovec-preference=scalable -fno-vect-cost-model -mno-autovec-segment" } */
+
+#include "mask_struct_load-2.c"
+
+/* { dg-final { scan-assembler-not {v[ls]seg[2-8]e[123468]+\.v} } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_load_noseg-3.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_load_noseg-3.c
new file mode 100644
index 00000000000..c02cff002f1
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_load_noseg-3.c
@@ -0,0 +1,6 @@
+/* { dg-do compile } */
+/* { dg-additional-options "-std=c99 -march=rv32gcv_zvfh -mabi=ilp32d --param=riscv-autovec-preference=scalable -fno-vect-cost-model -mno-autovec-segment" } */
+
+#include "mask_struct_load-3.c"
+
+/* { dg-final { scan-assembler-not {v[ls]seg[2-8]e[123468]+\.v} } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_load_noseg-4.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_load_noseg-4.c
new file mode 100644
index 00000000000..7b4be34bcf5
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_load_noseg-4.c
@@ -0,0 +1,6 @@
+/* { dg-do compile } */
+/* { dg-additional-options "-std=c99 -march=rv32gcv_zvfh -mabi=ilp32d --param=riscv-autovec-preference=scalable -fno-vect-cost-model -mno-autovec-segment" } */
+
+#include "mask_struct_load-4.c"
+
+/* { dg-final { scan-assembler-not {v[ls]seg[2-8]e[123468]+\.v} } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_load_noseg-5.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_load_noseg-5.c
new file mode 100644
index 00000000000..0f999187dd3
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_load_noseg-5.c
@@ -0,0 +1,6 @@
+/* { dg-do compile } */
+/* { dg-additional-options "-std=c99 -march=rv32gcv_zvfh -mabi=ilp32d --param=riscv-autovec-preference=scalable -fno-vect-cost-model -mno-autovec-segment" } */
+
+#include "mask_struct_load-5.c"
+
+/* { dg-final { scan-assembler-not {v[ls]seg[2-8]e[123468]+\.v} } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_load_noseg-6.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_load_noseg-6.c
new file mode 100644
index 00000000000..5dc550b9206
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_load_noseg-6.c
@@ -0,0 +1,6 @@
+/* { dg-do compile } */
+/* { dg-additional-options "-std=c99 -march=rv32gcv_zvfh -mabi=ilp32d --param=riscv-autovec-preference=scalable -fno-vect-cost-model -mno-autovec-segment" } */
+
+#include "mask_struct_load-6.c"
+
+/* { dg-final { scan-assembler-not {v[ls]seg[2-8]e[123468]+\.v} } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_load_noseg-7.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_load_noseg-7.c
new file mode 100644
index 00000000000..761b47e61e7
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_load_noseg-7.c
@@ -0,0 +1,6 @@
+/* { dg-do compile } */
+/* { dg-additional-options "-std=c99 -march=rv32gcv_zvfh -mabi=ilp32d --param=riscv-autovec-preference=scalable -fno-vect-cost-model -mno-autovec-segment" } */
+
+#include "mask_struct_load-7.c"
+
+/* { dg-final { scan-assembler-not {v[ls]seg[2-8]e[123468]+\.v} } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_load_noseg_run-1.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_load_noseg_run-1.c
new file mode 100644
index 00000000000..072359548eb
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_load_noseg_run-1.c
@@ -0,0 +1,4 @@
+/* { dg-do run { target { riscv_v } } } */
+/* { dg-additional-options "--param=riscv-autovec-preference=scalable -fno-vect-cost-model -mno-autovec-segment" } */
+
+#include "mask_struct_load_run-1.c"
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_load_noseg_run-2.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_load_noseg_run-2.c
new file mode 100644
index 00000000000..7118ea38927
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_load_noseg_run-2.c
@@ -0,0 +1,4 @@
+/* { dg-do run { target { riscv_v } } } */
+/* { dg-additional-options "--param=riscv-autovec-preference=scalable -fno-vect-cost-model -mno-autovec-segment" } */
+
+#include "mask_struct_load_run-2.c"
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_load_noseg_run-3.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_load_noseg_run-3.c
new file mode 100644
index 00000000000..38608f56475
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_load_noseg_run-3.c
@@ -0,0 +1,4 @@
+/* { dg-do run { target { riscv_v } } } */
+/* { dg-additional-options "--param=riscv-autovec-preference=scalable -fno-vect-cost-model -mno-autovec-segment" } */
+
+#include "mask_struct_load_run-3.c"
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_load_noseg_run-4.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_load_noseg_run-4.c
new file mode 100644
index 00000000000..5e565fd2e44
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_load_noseg_run-4.c
@@ -0,0 +1,4 @@
+/* { dg-do run { target { riscv_v } } } */
+/* { dg-additional-options "--param=riscv-autovec-preference=scalable -fno-vect-cost-model -mno-autovec-segment" } */
+
+#include "mask_struct_load_run-4.c"
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_load_noseg_run-5.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_load_noseg_run-5.c
new file mode 100644
index 00000000000..8bcaa2e340a
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_load_noseg_run-5.c
@@ -0,0 +1,4 @@
+/* { dg-do run { target { riscv_v } } } */
+/* { dg-additional-options "--param=riscv-autovec-preference=scalable -fno-vect-cost-model -mno-autovec-segment" } */
+
+#include "mask_struct_load_run-5.c"
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_load_noseg_run-6.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_load_noseg_run-6.c
new file mode 100644
index 00000000000..8328962fcbe
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_load_noseg_run-6.c
@@ -0,0 +1,4 @@
+/* { dg-do run { target { riscv_v } } } */
+/* { dg-additional-options "--param=riscv-autovec-preference=scalable -fno-vect-cost-model -mno-autovec-segment" } */
+
+#include "mask_struct_load_run-6.c"
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_load_noseg_run-7.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_load_noseg_run-7.c
new file mode 100644
index 00000000000..db2a5cf908c
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_load_noseg_run-7.c
@@ -0,0 +1,4 @@
+/* { dg-do run { target { riscv_v } } } */
+/* { dg-additional-options "--param=riscv-autovec-preference=scalable -fno-vect-cost-model -mno-autovec-segment" } */
+
+#include "mask_struct_load_run-7.c"
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_store_noseg-1.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_store_noseg-1.c
new file mode 100644
index 00000000000..c7415ec86f6
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_store_noseg-1.c
@@ -0,0 +1,6 @@
+/* { dg-do compile } */
+/* { dg-additional-options "-std=c99 -march=rv32gcv_zvfh -mabi=ilp32d --param=riscv-autovec-preference=scalable -fno-vect-cost-model -mno-autovec-segment" } */
+
+#include "mask_struct_store-1.c"
+
+/* { dg-final { scan-assembler-not {v[ls]seg[2-8]e[123468]+\.v} } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_store_noseg-2.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_store_noseg-2.c
new file mode 100644
index 00000000000..f0abda66ef0
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_store_noseg-2.c
@@ -0,0 +1,6 @@
+/* { dg-do compile } */
+/* { dg-additional-options "-std=c99 -march=rv32gcv_zvfh -mabi=ilp32d --param=riscv-autovec-preference=scalable -fno-vect-cost-model -mno-autovec-segment" } */
+
+#include "mask_struct_store-2.c"
+
+/* { dg-final { scan-assembler-not {v[ls]seg[2-8]e[123468]+\.v} } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_store_noseg-3.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_store_noseg-3.c
new file mode 100644
index 00000000000..4331c7bac13
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_store_noseg-3.c
@@ -0,0 +1,6 @@
+/* { dg-do compile } */
+/* { dg-additional-options "-std=c99 -march=rv32gcv_zvfh -mabi=ilp32d --param=riscv-autovec-preference=scalable -fno-vect-cost-model -mno-autovec-segment" } */
+
+#include "mask_struct_store-3.c"
+
+/* { dg-final { scan-assembler-not {v[ls]seg[2-8]e[123468]+\.v} } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_store_noseg-4.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_store_noseg-4.c
new file mode 100644
index 00000000000..599fbd78e02
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_store_noseg-4.c
@@ -0,0 +1,6 @@
+/* { dg-do compile } */
+/* { dg-additional-options "-std=c99 -march=rv32gcv_zvfh -mabi=ilp32d --param=riscv-autovec-preference=scalable -fno-vect-cost-model -mno-autovec-segment" } */
+
+#include "mask_struct_store-4.c"
+
+/* { dg-final { scan-assembler-not {v[ls]seg[2-8]e[123468]+\.v} } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_store_noseg-5.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_store_noseg-5.c
new file mode 100644
index 00000000000..1757b0e27b1
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_store_noseg-5.c
@@ -0,0 +1,6 @@
+/* { dg-do compile } */
+/* { dg-additional-options "-std=c99 -march=rv32gcv_zvfh -mabi=ilp32d --param=riscv-autovec-preference=scalable -fno-vect-cost-model -mno-autovec-segment" } */
+
+#include "mask_struct_store-5.c"
+
+/* { dg-final { scan-assembler-not {v[ls]seg[2-8]e[123468]+\.v} } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_store_noseg-6.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_store_noseg-6.c
new file mode 100644
index 00000000000..0dea4f3300e
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_store_noseg-6.c
@@ -0,0 +1,6 @@
+/* { dg-do compile } */
+/* { dg-additional-options "-std=c99 -march=rv32gcv_zvfh -mabi=ilp32d --param=riscv-autovec-preference=scalable -fno-vect-cost-model -mno-autovec-segment" } */
+
+#include "mask_struct_store-6.c"
+
+/* { dg-final { scan-assembler-not {v[ls]seg[2-8]e[123468]+\.v} } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_store_noseg-7.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_store_noseg-7.c
new file mode 100644
index 00000000000..90b8432fbc6
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_store_noseg-7.c
@@ -0,0 +1,6 @@
+/* { dg-do compile } */
+/* { dg-additional-options "-std=c99 -march=rv32gcv_zvfh -mabi=ilp32d --param=riscv-autovec-preference=scalable -fno-vect-cost-model -mno-autovec-segment" } */
+
+#include "mask_struct_store-7.c"
+
+/* { dg-final { scan-assembler-not {v[ls]seg[2-8]e[123468]+\.v} } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_store_noseg_run-1.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_store_noseg_run-1.c
new file mode 100644
index 00000000000..fcd9b0302a0
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_store_noseg_run-1.c
@@ -0,0 +1,4 @@
+/* { dg-do run { target { riscv_v } } } */
+/* { dg-additional-options "--param=riscv-autovec-preference=scalable -fno-vect-cost-model -mno-autovec-segment" } */
+
+#include "mask_struct_store_run-1.c"
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_store_noseg_run-2.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_store_noseg_run-2.c
new file mode 100644
index 00000000000..5541a3a7105
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_store_noseg_run-2.c
@@ -0,0 +1,4 @@
+/* { dg-do run { target { riscv_v } } } */
+/* { dg-additional-options "--param=riscv-autovec-preference=scalable -fno-vect-cost-model -mno-autovec-segment" } */
+
+#include "mask_struct_store_run-2.c"
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_store_noseg_run-3.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_store_noseg_run-3.c
new file mode 100644
index 00000000000..415d7cfd025
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_store_noseg_run-3.c
@@ -0,0 +1,4 @@
+/* { dg-do run { target { riscv_v } } } */
+/* { dg-additional-options "--param=riscv-autovec-preference=scalable -fno-vect-cost-model -mno-autovec-segment" } */
+
+#include "mask_struct_store_run-3.c"
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_store_noseg_run-4.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_store_noseg_run-4.c
new file mode 100644
index 00000000000..e5471c2242f
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_store_noseg_run-4.c
@@ -0,0 +1,4 @@
+/* { dg-do run { target { riscv_v } } } */
+/* { dg-additional-options "--param=riscv-autovec-preference=scalable -fno-vect-cost-model -mno-autovec-segment" } */
+
+#include "mask_struct_store_run-4.c"
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_store_noseg_run-5.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_store_noseg_run-5.c
new file mode 100644
index 00000000000..178057f7724
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_store_noseg_run-5.c
@@ -0,0 +1,4 @@
+/* { dg-do run { target { riscv_v } } } */
+/* { dg-additional-options "--param=riscv-autovec-preference=scalable -fno-vect-cost-model -mno-autovec-segment" } */
+
+#include "mask_struct_store_run-5.c"
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_store_noseg_run-6.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_store_noseg_run-6.c
new file mode 100644
index 00000000000..91e24d64aa3
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_store_noseg_run-6.c
@@ -0,0 +1,4 @@
+/* { dg-do run { target { riscv_v } } } */
+/* { dg-additional-options "--param=riscv-autovec-preference=scalable -fno-vect-cost-model -mno-autovec-segment" } */
+
+#include "mask_struct_store_run-6.c"
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_store_noseg_run-7.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_store_noseg_run-7.c
new file mode 100644
index 00000000000..5ce8bb7bae2
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/mask_struct_store_noseg_run-7.c
@@ -0,0 +1,4 @@
+/* { dg-do run { target { riscv_v } } } */
+/* { dg-additional-options "--param=riscv-autovec-preference=scalable -fno-vect-cost-model -mno-autovec-segment" } */
+
+#include "mask_struct_store_run-7.c"
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-1.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-1.c
new file mode 100644
index 00000000000..8d040bd2535
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-1.c
@@ -0,0 +1,8 @@
+/* { dg-do compile } */
+/* { dg-additional-options "-std=c99 -march=rv32gcv_zvfh -mabi=ilp32d --param=riscv-autovec-preference=fixed-vlmax -funroll-all-loops -fno-schedule-insns -fno-schedule-insns2 -mno-autovec-segment" } */
+
+#include "struct_vect-1.c"
+
+/* { dg-final { scan-assembler-not {v[ls]seg[2-8]e[123468]+\.v} } } */
+/* { dg-final { scan-assembler-times {vsetivli\s+zero,\s*16,\s*e8,\s*m1,\s*t[au],\s*m[au]} 8 } } */
+/* { dg-final { scan-assembler-not {vsetvli} } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-10.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-10.c
new file mode 100644
index 00000000000..9f533f4ff49
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-10.c
@@ -0,0 +1,7 @@
+/* { dg-do compile } */
+/* { dg-additional-options "-std=c99 -march=rv32gcv_zvfh -mabi=ilp32d --param=riscv-autovec-preference=scalable -fno-vect-cost-model -mno-autovec-segment" } */
+
+#include "struct_vect-10.c"
+
+/* { dg-final { scan-assembler-not {v[ls]seg[2-8]e[123468]+\.v} } } */
+/* { dg-final { scan-assembler-times {vsetvli\s+[a-x0-9]+,\s*[a-x0-9]+} 0 } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-11.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-11.c
new file mode 100644
index 00000000000..2b12ed16822
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-11.c
@@ -0,0 +1,7 @@
+/* { dg-do compile } */
+/* { dg-additional-options "-std=c99 -march=rv32gcv_zvfh -mabi=ilp32d --param=riscv-autovec-preference=scalable -fno-vect-cost-model -mno-autovec-segment" } */
+
+#include "struct_vect-11.c"
+
+/* { dg-final { scan-assembler-not {v[ls]seg[2-8]e[123468]+\.v} } } */
+/* { dg-final { scan-assembler-times {vsetvli\s+[a-x0-9]+,\s*[a-x0-9]+} 0 } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-12.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-12.c
new file mode 100644
index 00000000000..265e2905653
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-12.c
@@ -0,0 +1,7 @@
+/* { dg-do compile } */
+/* { dg-additional-options "-std=c99 -march=rv64gcv_zvfh -mabi=lp64d --param=riscv-autovec-preference=scalable -fno-vect-cost-model -mno-autovec-segment" } */
+
+#include "struct_vect-12.c"
+
+/* { dg-final { scan-assembler-not {v[ls]seg[2-8]e[123468]+\.v} } } */
+/* { dg-final { scan-assembler-times {vsetvli\s+[a-x0-9]+,\s*[a-x0-9]+} 0 } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-13.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-13.c
new file mode 100644
index 00000000000..ff134ecbbc2
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-13.c
@@ -0,0 +1,6 @@
+/* { dg-do compile } */
+/* { dg-additional-options "-std=c99 -march=rv64gcv_zvfh -mabi=lp64d --param=riscv-autovec-preference=scalable -fno-vect-cost-model -mno-autovec-segment" } */
+
+#include "struct_vect-13.c"
+
+/* { dg-final { scan-assembler-not {v[ls]seg[2-8]e[123468]+\.v} } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-14.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-14.c
new file mode 100644
index 00000000000..06648125073
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-14.c
@@ -0,0 +1,6 @@
+/* { dg-do compile } */
+/* { dg-additional-options "-std=c99 -march=rv64gcv_zvfh -mabi=lp64d --param=riscv-autovec-preference=scalable -fno-vect-cost-model -mno-autovec-segment" } */
+
+#include "struct_vect-14.c"
+
+/* { dg-final { scan-assembler-not {v[ls]seg[2-8]e[123468]+\.v} } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-15.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-15.c
new file mode 100644
index 00000000000..356054bf6a0
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-15.c
@@ -0,0 +1,6 @@
+/* { dg-do compile } */
+/* { dg-additional-options "-std=c99 -march=rv64gcv_zvfh -mabi=lp64d --param=riscv-autovec-preference=scalable -fno-vect-cost-model -mno-autovec-segment" } */
+
+#include "struct_vect-15.c"
+
+/* { dg-final { scan-assembler-not {v[ls]seg[2-8]e[123468]+\.v} } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-16.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-16.c
new file mode 100644
index 00000000000..21d36c002d1
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-16.c
@@ -0,0 +1,6 @@
+/* { dg-do compile } */
+/* { dg-additional-options "-std=c99 -march=rv64gcv_zvfh -mabi=lp64d --param=riscv-autovec-preference=scalable -fno-vect-cost-model -mno-autovec-segment" } */
+
+#include "struct_vect-16.c"
+
+/* { dg-final { scan-assembler-not {v[ls]seg[2-8]e[123468]+\.v} } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-17.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-17.c
new file mode 100644
index 00000000000..7f9763682a0
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-17.c
@@ -0,0 +1,6 @@
+/* { dg-do compile } */
+/* { dg-additional-options "-std=c99 -march=rv64gcv_zvfh -mabi=lp64d --param=riscv-autovec-preference=scalable -fno-vect-cost-model -mno-autovec-segment" } */
+
+#include "struct_vect-17.c"
+
+/* { dg-final { scan-assembler-not {v[ls]seg[2-8]e[123468]+\.v} } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-18.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-18.c
new file mode 100644
index 00000000000..86bdc2ca8d1
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-18.c
@@ -0,0 +1,6 @@
+/* { dg-do compile } */
+/* { dg-additional-options "-std=c99 -march=rv64gcv_zvfh -mabi=lp64d --param=riscv-autovec-preference=scalable -fno-vect-cost-model -mno-autovec-segment" } */
+
+#include "struct_vect-18.c"
+
+/* { dg-final { scan-assembler-not {v[ls]seg[2-8]e[123468]+\.v} } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-2.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-2.c
new file mode 100644
index 00000000000..24fc8c745ed
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-2.c
@@ -0,0 +1,8 @@
+/* { dg-do compile } */
+/* { dg-additional-options "-std=c99 -march=rv32gcv_zvfh -mabi=ilp32d --param=riscv-autovec-preference=fixed-vlmax -funroll-all-loops -fno-schedule-insns -fno-schedule-insns2 -mno-autovec-segment" } */
+
+#include "struct_vect-2.c"
+
+/* { dg-final { scan-assembler-not {v[ls]seg[2-8]e[123468]+\.v} } } */
+/* { dg-final { scan-assembler-times {vsetivli\s+zero,\s*8,\s*e16,\s*m1,\s*t[au],\s*m[au]} 8 } } */
+/* { dg-final { scan-assembler-not {vsetvli} } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-3.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-3.c
new file mode 100644
index 00000000000..16f4fd366e4
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-3.c
@@ -0,0 +1,8 @@
+/* { dg-do compile } */
+/* { dg-additional-options "-std=c99 -march=rv32gcv_zvfh -mabi=ilp32d --param=riscv-autovec-preference=fixed-vlmax -funroll-all-loops -fno-schedule-insns -fno-schedule-insns2 -mno-autovec-segment" } */
+
+#include "struct_vect-3.c"
+
+/* { dg-final { scan-assembler-not {v[ls]seg[2-8]e[123468]+\.v} } } */
+/* { dg-final { scan-assembler-times {vsetivli\s+zero,\s*4,\s*e32,\s*m1,\s*t[au],\s*m[au]} 17 } } */
+/* { dg-final { scan-assembler-not {vsetvli} } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-4.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-4.c
new file mode 100644
index 00000000000..1d18033e174
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-4.c
@@ -0,0 +1,8 @@
+/* { dg-do compile } */
+/* { dg-additional-options "-std=c99 -march=rv32gcv_zvfh -mabi=ilp32d --param=riscv-autovec-preference=fixed-vlmax -funroll-all-loops -fno-schedule-insns -fno-schedule-insns2 -mno-autovec-segment" } */
+
+#include "struct_vect-4.c"
+
+/* { dg-final { scan-assembler-not {v[ls]seg[2-8]e[123468]+\.v} } } */
+/* { dg-final { scan-assembler-times {vsetivli\s+zero,\s*2,\s*e64,\s*m1,\s*t[au],\s*m[au]} 46 } } */
+/* { dg-final { scan-assembler-not {vsetvli} } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-5.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-5.c
new file mode 100644
index 00000000000..d5983ef95ea
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-5.c
@@ -0,0 +1,8 @@
+/* { dg-do compile } */
+/* { dg-additional-options "-std=c99 -march=rv32gcv_zvfh -mabi=ilp32d --param=riscv-autovec-preference=fixed-vlmax -funroll-all-loops -fno-schedule-insns -fno-schedule-insns2 -mno-autovec-segment" } */
+
+#include "struct_vect-5.c"
+
+/* { dg-final { scan-assembler-not {v[ls]seg[2-8]e[123468]+\.v} } } */
+/* { dg-final { scan-assembler-times {vsetivli\s+zero,\s*4,\s*e32,\s*m1,\s*t[au],\s*m[au]} 17 } } */
+/* { dg-final { scan-assembler-not {vsetvli} } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-6.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-6.c
new file mode 100644
index 00000000000..9b158b9b740
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-6.c
@@ -0,0 +1,7 @@
+/* { dg-do compile } */
+/* { dg-additional-options "-std=c99 -march=rv32gcv_zvfh -mabi=ilp32d --param=riscv-autovec-preference=scalable -fno-vect-cost-model -mno-autovec-segment" } */
+
+#include "struct_vect-6.c"
+
+/* { dg-final { scan-assembler-not {v[ls]seg[2-8]e[123468]+\.v} } } */
+/* { dg-final { scan-assembler-times {vsetvli\s+[a-x0-9]+,\s*[a-x0-9]+,\s*e8,\s*m1,\s*t[au],\s*m[au]} 0 } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-7.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-7.c
new file mode 100644
index 00000000000..d9495e77d7f
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-7.c
@@ -0,0 +1,7 @@
+/* { dg-do compile } */
+/* { dg-additional-options "-std=c99 -march=rv32gcv_zvfh -mabi=ilp32d --param=riscv-autovec-preference=scalable -fno-vect-cost-model -mno-autovec-segment" } */
+
+#include "struct_vect-7.c"
+
+/* { dg-final { scan-assembler-not {v[ls]seg[2-8]e[123468]+\.v} } } */
+/* { dg-final { scan-assembler-times {vsetvli\s+[a-x0-9]+,\s*[a-x0-9]+} 0 } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-8.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-8.c
new file mode 100644
index 00000000000..5e239e8b934
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-8.c
@@ -0,0 +1,7 @@
+/* { dg-do compile } */
+/* { dg-additional-options "-std=c99 -march=rv32gcv_zvfh -mabi=ilp32d --param=riscv-autovec-preference=scalable -fno-vect-cost-model -mno-autovec-segment" } */
+
+#include "struct_vect-8.c"
+
+/* { dg-final { scan-assembler-not {v[ls]seg[2-8]e[123468]+\.v} } } */
+/* { dg-final { scan-assembler-times {vsetvli\s+[a-x0-9]+,\s*[a-x0-9]+} 0 } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-9.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-9.c
new file mode 100644
index 00000000000..5248f2a39c2
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg-9.c
@@ -0,0 +1,7 @@
+/* { dg-do compile } */
+/* { dg-additional-options "-std=c99 -march=rv64gcv_zvfh -mabi=lp64d --param=riscv-autovec-preference=scalable -fno-vect-cost-model -mno-autovec-segment" } */
+
+#include "struct_vect-9.c"
+
+/* { dg-final { scan-assembler-not {v[ls]seg[2-8]e[123468]+\.v} } } */
+/* { dg-final { scan-assembler-times {vsetvli\s+[a-x0-9]+,\s*[a-x0-9]+} 0 } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-1.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-1.c
new file mode 100644
index 00000000000..0e24c5772b8
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-1.c
@@ -0,0 +1,4 @@
+/* { dg-do run { target { riscv_v } } } */
+/* { dg-additional-options "-std=c99 --param=riscv-autovec-preference=fixed-vlmax -funroll-all-loops -fno-schedule-insns -fno-schedule-insns2 -mno-autovec-segment" } */
+
+#include "struct_vect_run-1.c"
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-10.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-10.c
new file mode 100644
index 00000000000..e095b769906
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-10.c
@@ -0,0 +1,4 @@
+/* { dg-do run { target { riscv_v && riscv_zvfh_hw } } } */
+/* { dg-additional-options "-std=c99 --param=riscv-autovec-preference=scalable -fno-vect-cost-model -mno-autovec-segment" } */
+
+#include "struct_vect_run-10.c"
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-11.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-11.c
new file mode 100644
index 00000000000..549dd15ad22
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-11.c
@@ -0,0 +1,4 @@
+/* { dg-do run { target { riscv_v } } } */
+/* { dg-additional-options "-std=c99 --param=riscv-autovec-preference=scalable -fno-vect-cost-model -mno-autovec-segment" } */
+
+#include "struct_vect_run-11.c"
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-12.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-12.c
new file mode 100644
index 00000000000..8fa80cf6530
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-12.c
@@ -0,0 +1,4 @@
+/* { dg-do run { target { riscv_v } } } */
+/* { dg-additional-options "-std=c99 --param=riscv-autovec-preference=scalable -fno-vect-cost-model -mno-autovec-segment" } */
+
+#include "struct_vect_run-12.c"
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-13.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-13.c
new file mode 100644
index 00000000000..9b0e3b7881d
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-13.c
@@ -0,0 +1,4 @@
+/* { dg-do run { target { riscv_v } } } */
+/* { dg-additional-options "--param=riscv-autovec-preference=scalable -fno-vect-cost-model -mno-autovec-segment" } */
+
+#include "struct_vect_run-13.c"
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-14.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-14.c
new file mode 100644
index 00000000000..34b871e7073
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-14.c
@@ -0,0 +1,4 @@
+/* { dg-do run { target { riscv_v } } } */
+/* { dg-additional-options "--param=riscv-autovec-preference=scalable -fno-vect-cost-model -mno-autovec-segment" } */
+
+#include "struct_vect_run-14.c"
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-15.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-15.c
new file mode 100644
index 00000000000..4166903f11a
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-15.c
@@ -0,0 +1,4 @@
+/* { dg-do run { target { riscv_v } } } */
+/* { dg-additional-options "--param=riscv-autovec-preference=scalable -fno-vect-cost-model -mno-autovec-segment" } */
+
+#include "struct_vect_run-15.c"
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-16.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-16.c
new file mode 100644
index 00000000000..f86a3a7c6de
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-16.c
@@ -0,0 +1,4 @@
+/* { dg-do run { target { riscv_v } } } */
+/* { dg-additional-options "--param=riscv-autovec-preference=scalable -fno-vect-cost-model -mno-autovec-segment" } */
+
+#include "struct_vect_run-16.c"
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-17.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-17.c
new file mode 100644
index 00000000000..113c8c8fd72
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-17.c
@@ -0,0 +1,4 @@
+/* { dg-do run { target { riscv_v } } } */
+/* { dg-additional-options "--param=riscv-autovec-preference=scalable -fno-vect-cost-model -mno-autovec-segment" } */
+
+#include "struct_vect_run-17.c"
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-18.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-18.c
new file mode 100644
index 00000000000..a1436fab644
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-18.c
@@ -0,0 +1,4 @@
+/* { dg-do run { target { riscv_v } } } */
+/* { dg-additional-options "--param=riscv-autovec-preference=scalable -fno-vect-cost-model -mno-autovec-segment" } */
+
+#include "struct_vect_run-18.c"
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-2.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-2.c
new file mode 100644
index 00000000000..2108b5e9592
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-2.c
@@ -0,0 +1,4 @@
+/* { dg-do run { target { riscv_v } } } */
+/* { dg-additional-options "-std=c99 --param=riscv-autovec-preference=fixed-vlmax -funroll-all-loops -fno-schedule-insns -fno-schedule-insns2 -mno-autovec-segment" } */
+
+#include "struct_vect_run-2.c"
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-3.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-3.c
new file mode 100644
index 00000000000..5640a7e66a9
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-3.c
@@ -0,0 +1,4 @@
+/* { dg-do run { target { riscv_v } } } */
+/* { dg-additional-options "-std=c99 --param=riscv-autovec-preference=fixed-vlmax -funroll-all-loops -fno-schedule-insns -fno-schedule-insns2 -mno-autovec-segment" } */
+
+#include "struct_vect_run-3.c"
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-4.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-4.c
new file mode 100644
index 00000000000..2bfda096552
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-4.c
@@ -0,0 +1,4 @@
+/* { dg-do run { target { riscv_v } } } */
+/* { dg-additional-options "-std=c99 --param=riscv-autovec-preference=fixed-vlmax -funroll-all-loops -fno-schedule-insns -fno-schedule-insns2 -mno-autovec-segment" } */
+
+#include "struct_vect_run-4.c"
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-5.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-5.c
new file mode 100644
index 00000000000..6c03a7caf3d
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-5.c
@@ -0,0 +1,4 @@
+/* { dg-do run { target { riscv_v } } } */
+/* { dg-additional-options "-std=c99 --param=riscv-autovec-preference=fixed-vlmax -funroll-all-loops -fno-schedule-insns -fno-schedule-insns2 -mno-autovec-segment" } */
+
+#include "struct_vect_run-5.c"
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-6.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-6.c
new file mode 100644
index 00000000000..4d216ae197c
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-6.c
@@ -0,0 +1,4 @@
+/* { dg-do run { target { riscv_v } } } */
+/* { dg-additional-options "-std=c99 --param=riscv-autovec-preference=scalable -fno-vect-cost-model -mno-autovec-segment" } */
+
+#include "struct_vect_run-6.c"
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-7.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-7.c
new file mode 100644
index 00000000000..d1a00f1aed6
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-7.c
@@ -0,0 +1,4 @@
+/* { dg-do run { target { riscv_v } } } */
+/* { dg-additional-options "-std=c99 --param=riscv-autovec-preference=scalable -fno-vect-cost-model -mno-autovec-segment" } */
+
+#include "struct_vect_run-7.c"
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-8.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-8.c
new file mode 100644
index 00000000000..a0a35a90e3e
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-8.c
@@ -0,0 +1,4 @@
+/* { dg-do run { target { riscv_v } } } */
+/* { dg-additional-options "-std=c99 --param=riscv-autovec-preference=scalable -fno-vect-cost-model -mno-autovec-segment" } */
+
+#include "struct_vect_run-8.c"
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-9.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-9.c
new file mode 100644
index 00000000000..286a7efe2fb
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/struct/struct_vect_noseg_run-9.c
@@ -0,0 +1,4 @@
+/* { dg-do run { target { riscv_v } } } */
+/* { dg-additional-options "-std=c99 --param=riscv-autovec-preference=scalable -fno-vect-cost-model -mno-autovec-segment" } */
+
+#include "struct_vect_run-9.c"
diff --git a/gcc/tree-vect-stmts.cc b/gcc/tree-vect-stmts.cc
index 4219ad832db..34f5736ba00 100644
--- a/gcc/tree-vect-stmts.cc
+++ b/gcc/tree-vect-stmts.cc
@@ -11558,7 +11558,8 @@ vectorizable_load (vec_info *vinfo,
 				 - (vec_num * j + i) * nunits);
 			    /* remain should now be > 0 and < nunits.  */
 			    unsigned num;
-			    if (constant_multiple_p (nunits, remain, &num))
+			    if (known_gt (remain, 0)
+				&& constant_multiple_p (nunits, remain, &num))
 			      {
 				tree ptype;
 				new_vtype
-- 
2.43.2