[PATCH v2 3/4] RISC-V: Add test for vec_duplicate + vssubu.vv combine case 1 with GR2VR cost 0, 1 and 2

Fri, 27 Jun 2025 02:33:10 -0700 

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

Add asm dump check test for vec_duplicate + vssubu.vv combine to
vssubu.vx, with the GR2VR cost is 0, 1 and 2.

gcc/testsuite/ChangeLog:

        * gcc.target/riscv/rvv/autovec/vx_vf/vx-4-u16.c: Add asm check
        for vssubu.vx combine.
        * gcc.target/riscv/rvv/autovec/vx_vf/vx-4-u32.c: Ditto.
        * gcc.target/riscv/rvv/autovec/vx_vf/vx-4-u64.c: Ditto.
        * gcc.target/riscv/rvv/autovec/vx_vf/vx-4-u8.c: Ditto.
        * gcc.target/riscv/rvv/autovec/vx_vf/vx-5-u16.c: Ditto.
        * gcc.target/riscv/rvv/autovec/vx_vf/vx-5-u32.c: Ditto.
        * gcc.target/riscv/rvv/autovec/vx_vf/vx-5-u64.c: Ditto.
        * gcc.target/riscv/rvv/autovec/vx_vf/vx-5-u8.c: Ditto.
        * gcc.target/riscv/rvv/autovec/vx_vf/vx-6-u16.c: Ditto.
        * gcc.target/riscv/rvv/autovec/vx_vf/vx-6-u32.c: Ditto.
        * gcc.target/riscv/rvv/autovec/vx_vf/vx-6-u64.c: Ditto.
        * gcc.target/riscv/rvv/autovec/vx_vf/vx-6-u8.c: Ditto.

Signed-off-by: Pan Li <pan2...@intel.com>
---
 gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx-4-u16.c | 2 ++
 gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx-4-u32.c | 2 ++
 gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx-4-u64.c | 2 ++
 gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx-4-u8.c  | 2 ++
 gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx-5-u16.c | 2 ++
 gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx-5-u32.c | 2 ++
 gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx-5-u64.c | 2 ++
 gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx-5-u8.c  | 2 ++
 gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx-6-u16.c | 2 ++
 gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx-6-u32.c | 2 ++
 gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx-6-u64.c | 2 ++
 gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx-6-u8.c  | 2 ++
 12 files changed, 24 insertions(+)

diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx-4-u16.c 
b/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx-4-u16.c
index de10d66a1b2..afb5a8513a9 100644
--- a/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx-4-u16.c
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx-4-u16.c
@@ -18,6 +18,7 @@ DEF_VX_BINARY_CASE_3_WRAP(T, MAX_FUNC_1_WARP(T), max, 
VX_BINARY_FUNC_BODY_X8)
 DEF_VX_BINARY_CASE_3_WRAP(T, MIN_FUNC_0_WARP(T), min, VX_BINARY_FUNC_BODY_X8)
 DEF_VX_BINARY_CASE_3_WRAP(T, MIN_FUNC_1_WARP(T), min, VX_BINARY_FUNC_BODY_X8)
 DEF_VX_BINARY_CASE_3_WRAP(T, SAT_U_ADD_FUNC_WRAP(T), sat_add, 
VX_BINARY_FUNC_BODY_X8)
+DEF_VX_BINARY_CASE_3_WRAP(T, SAT_U_SUB_FUNC_WRAP(T), sat_sub, 
VX_BINARY_FUNC_BODY_X8)
 
 /* { dg-final { scan-assembler {vadd.vx} } } */
 /* { dg-final { scan-assembler {vsub.vx} } } */
@@ -30,3 +31,4 @@ DEF_VX_BINARY_CASE_3_WRAP(T, SAT_U_ADD_FUNC_WRAP(T), sat_add, 
VX_BINARY_FUNC_BOD
 /* { dg-final { scan-assembler {vmaxu.vx} } } */
 /* { dg-final { scan-assembler {vminu.vx} } } */
 /* { dg-final { scan-assembler {vsaddu.vx} } } */
+/* { dg-final { scan-assembler {vssubu.vx} } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx-4-u32.c 
b/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx-4-u32.c
index 2e59da06c97..a907e9b7222 100644
--- a/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx-4-u32.c
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx-4-u32.c
@@ -18,6 +18,7 @@ DEF_VX_BINARY_CASE_3_WRAP(T, MAX_FUNC_1_WARP(T), max, 
VX_BINARY_FUNC_BODY_X4)
 DEF_VX_BINARY_CASE_3_WRAP(T, MIN_FUNC_0_WARP(T), min, VX_BINARY_FUNC_BODY_X4)
 DEF_VX_BINARY_CASE_3_WRAP(T, MIN_FUNC_1_WARP(T), min, VX_BINARY_FUNC_BODY_X4)
 DEF_VX_BINARY_CASE_3_WRAP(T, SAT_U_ADD_FUNC_WRAP(T), sat_add, 
VX_BINARY_FUNC_BODY_X4)
+DEF_VX_BINARY_CASE_3_WRAP(T, SAT_U_SUB_FUNC_WRAP(T), sat_sub, 
VX_BINARY_FUNC_BODY_X4)
 
 /* { dg-final { scan-assembler {vadd.vx} } } */
 /* { dg-final { scan-assembler {vsub.vx} } } */
@@ -29,3 +30,4 @@ DEF_VX_BINARY_CASE_3_WRAP(T, SAT_U_ADD_FUNC_WRAP(T), sat_add, 
VX_BINARY_FUNC_BOD
 /* { dg-final { scan-assembler {vremu.vx} } } */
 /* { dg-final { scan-assembler {vmaxu.vx} } } */
 /* { dg-final { scan-assembler {vminu.vx} } } */
+/* { dg-final { scan-assembler {vssubu.vx} } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx-4-u64.c 
b/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx-4-u64.c
index 064ed1f2e89..efabf9930f0 100644
--- a/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx-4-u64.c
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx-4-u64.c
@@ -18,6 +18,7 @@ DEF_VX_BINARY_CASE_3_WRAP(T, MAX_FUNC_1_WARP(T), max, 
VX_BINARY_FUNC_BODY)
 DEF_VX_BINARY_CASE_3_WRAP(T, MIN_FUNC_0_WARP(T), min, VX_BINARY_FUNC_BODY)
 DEF_VX_BINARY_CASE_3_WRAP(T, MIN_FUNC_1_WARP(T), min, VX_BINARY_FUNC_BODY)
 DEF_VX_BINARY_CASE_3_WRAP(T, SAT_U_ADD_FUNC_WRAP(T), sat_add, 
VX_BINARY_FUNC_BODY)
+DEF_VX_BINARY_CASE_3_WRAP(T, SAT_U_SUB_FUNC_WRAP(T), sat_sub, 
VX_BINARY_FUNC_BODY)
 
 /* { dg-final { scan-assembler {vadd.vx} } } */
 /* { dg-final { scan-assembler {vsub.vx} } } */
@@ -30,3 +31,4 @@ DEF_VX_BINARY_CASE_3_WRAP(T, SAT_U_ADD_FUNC_WRAP(T), sat_add, 
VX_BINARY_FUNC_BOD
 /* { dg-final { scan-assembler {vmaxu.vx} } } */
 /* { dg-final { scan-assembler {vminu.vx} } } */
 /* { dg-final { scan-assembler-not {vsaddu.vx} } } */
+/* { dg-final { scan-assembler-not {vssubu.vx} } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx-4-u8.c 
b/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx-4-u8.c
index 6a8ff29b49f..7b2b08817e1 100644
--- a/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx-4-u8.c
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx-4-u8.c
@@ -18,6 +18,7 @@ DEF_VX_BINARY_CASE_3_WRAP(T, MAX_FUNC_1_WARP(T), max, 
VX_BINARY_FUNC_BODY_X8)
 DEF_VX_BINARY_CASE_3_WRAP(T, MIN_FUNC_0_WARP(T), min, VX_BINARY_FUNC_BODY_X8)
 DEF_VX_BINARY_CASE_3_WRAP(T, MIN_FUNC_1_WARP(T), min, VX_BINARY_FUNC_BODY_X8)
 DEF_VX_BINARY_CASE_3_WRAP(T, SAT_U_ADD_FUNC_WRAP(T), sat_add, 
VX_BINARY_FUNC_BODY_X8)
+DEF_VX_BINARY_CASE_3_WRAP(T, SAT_U_SUB_FUNC_WRAP(T), sat_sub, 
VX_BINARY_FUNC_BODY_X8)
 
 /* { dg-final { scan-assembler {vadd.vx} } } */
 /* { dg-final { scan-assembler {vsub.vx} } } */
@@ -30,3 +31,4 @@ DEF_VX_BINARY_CASE_3_WRAP(T, SAT_U_ADD_FUNC_WRAP(T), sat_add, 
VX_BINARY_FUNC_BOD
 /* { dg-final { scan-assembler {vmaxu.vx} } } */
 /* { dg-final { scan-assembler {vminu.vx} } } */
 /* { dg-final { scan-assembler {vsaddu.vx} } } */
+/* { dg-final { scan-assembler {vssubu.vx} } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx-5-u16.c 
b/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx-5-u16.c
index 7c789a5c73e..da1b1bec6bd 100644
--- a/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx-5-u16.c
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx-5-u16.c
@@ -18,6 +18,7 @@ DEF_VX_BINARY_CASE_3_WRAP(T, MAX_FUNC_1_WARP(T), max, 
VX_BINARY_FUNC_BODY_X8)
 DEF_VX_BINARY_CASE_3_WRAP(T, MIN_FUNC_0_WARP(T), min, VX_BINARY_FUNC_BODY_X8)
 DEF_VX_BINARY_CASE_3_WRAP(T, MIN_FUNC_1_WARP(T), min, VX_BINARY_FUNC_BODY_X8)
 DEF_VX_BINARY_CASE_3_WRAP(T, SAT_U_ADD_FUNC_WRAP(T), sat_add, 
VX_BINARY_FUNC_BODY_X8)
+DEF_VX_BINARY_CASE_3_WRAP(T, SAT_U_SUB_FUNC_WRAP(T), sat_sub, 
VX_BINARY_FUNC_BODY_X8)
 
 /* { dg-final { scan-assembler {vadd.vx} } } */
 /* { dg-final { scan-assembler {vsub.vx} } } */
@@ -30,3 +31,4 @@ DEF_VX_BINARY_CASE_3_WRAP(T, SAT_U_ADD_FUNC_WRAP(T), sat_add, 
VX_BINARY_FUNC_BOD
 /* { dg-final { scan-assembler {vmaxu.vx} } } */
 /* { dg-final { scan-assembler {vminu.vx} } } */
 /* { dg-final { scan-assembler {vsaddu.vx} } } */
+/* { dg-final { scan-assembler {vssubu.vx} } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx-5-u32.c 
b/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx-5-u32.c
index 2807e5850bc..b7ec6c9d315 100644
--- a/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx-5-u32.c
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx-5-u32.c
@@ -18,6 +18,7 @@ DEF_VX_BINARY_CASE_3_WRAP(T, MAX_FUNC_1_WARP(T), max, 
VX_BINARY_FUNC_BODY_X4)
 DEF_VX_BINARY_CASE_3_WRAP(T, MIN_FUNC_0_WARP(T), min, VX_BINARY_FUNC_BODY_X4)
 DEF_VX_BINARY_CASE_3_WRAP(T, MIN_FUNC_1_WARP(T), min, VX_BINARY_FUNC_BODY_X4)
 DEF_VX_BINARY_CASE_3_WRAP(T, SAT_U_ADD_FUNC_WRAP(T), sat_add, 
VX_BINARY_FUNC_BODY_X4)
+DEF_VX_BINARY_CASE_3_WRAP(T, SAT_U_SUB_FUNC_WRAP(T), sat_sub, 
VX_BINARY_FUNC_BODY_X4)
 
 /* { dg-final { scan-assembler {vadd.vx} } } */
 /* { dg-final { scan-assembler {vsub.vx} } } */
@@ -30,3 +31,4 @@ DEF_VX_BINARY_CASE_3_WRAP(T, SAT_U_ADD_FUNC_WRAP(T), sat_add, 
VX_BINARY_FUNC_BOD
 /* { dg-final { scan-assembler {vmaxu.vx} } } */
 /* { dg-final { scan-assembler {vminu.vx} } } */
 /* { dg-final { scan-assembler-not {vsaddu.vx} } } */
+/* { dg-final { scan-assembler {vssubu.vx} } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx-5-u64.c 
b/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx-5-u64.c
index 63159750faf..dce78b15e45 100644
--- a/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx-5-u64.c
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx-5-u64.c
@@ -18,6 +18,7 @@ DEF_VX_BINARY_CASE_3_WRAP(T, MAX_FUNC_1_WARP(T), max, 
VX_BINARY_FUNC_BODY)
 DEF_VX_BINARY_CASE_3_WRAP(T, MIN_FUNC_0_WARP(T), min, VX_BINARY_FUNC_BODY)
 DEF_VX_BINARY_CASE_3_WRAP(T, MIN_FUNC_1_WARP(T), min, VX_BINARY_FUNC_BODY)
 DEF_VX_BINARY_CASE_3_WRAP(T, SAT_U_ADD_FUNC_WRAP(T), sat_add, 
VX_BINARY_FUNC_BODY)
+DEF_VX_BINARY_CASE_3_WRAP(T, SAT_U_SUB_FUNC_WRAP(T), sat_sub, 
VX_BINARY_FUNC_BODY)
 
 /* { dg-final { scan-assembler {vadd.vx} } } */
 /* { dg-final { scan-assembler {vsub.vx} } } */
@@ -30,3 +31,4 @@ DEF_VX_BINARY_CASE_3_WRAP(T, SAT_U_ADD_FUNC_WRAP(T), sat_add, 
VX_BINARY_FUNC_BOD
 /* { dg-final { scan-assembler {vmaxu.vx} } } */
 /* { dg-final { scan-assembler {vminu.vx} } } */
 /* { dg-final { scan-assembler-not {vsaddu.vx} } } */
+/* { dg-final { scan-assembler-not {vssubu.vx} } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx-5-u8.c 
b/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx-5-u8.c
index 127c49ec79a..c5c6fb8f311 100644
--- a/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx-5-u8.c
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx-5-u8.c
@@ -18,6 +18,7 @@ DEF_VX_BINARY_CASE_3_WRAP(T, MAX_FUNC_1_WARP(T), max, 
VX_BINARY_FUNC_BODY_X8)
 DEF_VX_BINARY_CASE_3_WRAP(T, MIN_FUNC_0_WARP(T), min, VX_BINARY_FUNC_BODY_X8)
 DEF_VX_BINARY_CASE_3_WRAP(T, MIN_FUNC_1_WARP(T), min, VX_BINARY_FUNC_BODY_X8)
 DEF_VX_BINARY_CASE_3_WRAP(T, SAT_U_ADD_FUNC_WRAP(T), sat_add, 
VX_BINARY_FUNC_BODY_X8)
+DEF_VX_BINARY_CASE_3_WRAP(T, SAT_U_SUB_FUNC_WRAP(T), sat_sub, 
VX_BINARY_FUNC_BODY_X8)
 
 /* { dg-final { scan-assembler {vadd.vx} } } */
 /* { dg-final { scan-assembler {vsub.vx} } } */
@@ -30,3 +31,4 @@ DEF_VX_BINARY_CASE_3_WRAP(T, SAT_U_ADD_FUNC_WRAP(T), sat_add, 
VX_BINARY_FUNC_BOD
 /* { dg-final { scan-assembler {vmaxu.vx} } } */
 /* { dg-final { scan-assembler {vminu.vx} } } */
 /* { dg-final { scan-assembler {vsaddu.vx} } } */
+/* { dg-final { scan-assembler {vssubu.vx} } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx-6-u16.c 
b/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx-6-u16.c
index 0ca661cd7b1..5952a7c8990 100644
--- a/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx-6-u16.c
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx-6-u16.c
@@ -18,6 +18,7 @@ DEF_VX_BINARY_CASE_3_WRAP(T, MAX_FUNC_1_WARP(T), max, 
VX_BINARY_FUNC_BODY_X8)
 DEF_VX_BINARY_CASE_3_WRAP(T, MIN_FUNC_0_WARP(T), min, VX_BINARY_FUNC_BODY_X8)
 DEF_VX_BINARY_CASE_3_WRAP(T, MIN_FUNC_1_WARP(T), min, VX_BINARY_FUNC_BODY_X8)
 DEF_VX_BINARY_CASE_3_WRAP(T, SAT_U_ADD_FUNC_WRAP(T), sat_add, 
VX_BINARY_FUNC_BODY_X8)
+DEF_VX_BINARY_CASE_3_WRAP(T, SAT_U_SUB_FUNC_WRAP(T), sat_sub, 
VX_BINARY_FUNC_BODY_X8)
 
 /* { dg-final { scan-assembler {vadd.vx} } } */
 /* { dg-final { scan-assembler {vsub.vx} } } */
@@ -30,3 +31,4 @@ DEF_VX_BINARY_CASE_3_WRAP(T, SAT_U_ADD_FUNC_WRAP(T), sat_add, 
VX_BINARY_FUNC_BOD
 /* { dg-final { scan-assembler {vmaxu.vx} } } */
 /* { dg-final { scan-assembler {vminu.vx} } } */
 /* { dg-final { scan-assembler {vsaddu.vx} } } */
+/* { dg-final { scan-assembler {vssubu.vx} } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx-6-u32.c 
b/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx-6-u32.c
index f66eccd6acd..5bbc585c9d8 100644
--- a/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx-6-u32.c
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx-6-u32.c
@@ -18,6 +18,7 @@ DEF_VX_BINARY_CASE_3_WRAP(T, MAX_FUNC_1_WARP(T), max, 
VX_BINARY_FUNC_BODY_X4)
 DEF_VX_BINARY_CASE_3_WRAP(T, MIN_FUNC_0_WARP(T), min, VX_BINARY_FUNC_BODY_X4)
 DEF_VX_BINARY_CASE_3_WRAP(T, MIN_FUNC_1_WARP(T), min, VX_BINARY_FUNC_BODY_X4)
 DEF_VX_BINARY_CASE_3_WRAP(T, SAT_U_ADD_FUNC_WRAP(T), sat_add, 
VX_BINARY_FUNC_BODY_X4)
+DEF_VX_BINARY_CASE_3_WRAP(T, SAT_U_SUB_FUNC_WRAP(T), sat_sub, 
VX_BINARY_FUNC_BODY_X4)
 
 /* { dg-final { scan-assembler {vadd.vx} } } */
 /* { dg-final { scan-assembler {vsub.vx} } } */
@@ -30,3 +31,4 @@ DEF_VX_BINARY_CASE_3_WRAP(T, SAT_U_ADD_FUNC_WRAP(T), sat_add, 
VX_BINARY_FUNC_BOD
 /* { dg-final { scan-assembler {vmaxu.vx} } } */
 /* { dg-final { scan-assembler {vminu.vx} } } */
 /* { dg-final { scan-assembler-not {vsaddu.vx} } } */
+/* { dg-final { scan-assembler {vssubu.vx} } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx-6-u64.c 
b/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx-6-u64.c
index 01b693c573b..255ae62f7f6 100644
--- a/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx-6-u64.c
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx-6-u64.c
@@ -18,6 +18,7 @@ DEF_VX_BINARY_CASE_3_WRAP(T, MAX_FUNC_1_WARP(T), max, 
VX_BINARY_FUNC_BODY)
 DEF_VX_BINARY_CASE_3_WRAP(T, MIN_FUNC_0_WARP(T), min, VX_BINARY_FUNC_BODY)
 DEF_VX_BINARY_CASE_3_WRAP(T, MIN_FUNC_1_WARP(T), min, VX_BINARY_FUNC_BODY)
 DEF_VX_BINARY_CASE_3_WRAP(T, SAT_U_ADD_FUNC_WRAP(T), sat_add, 
VX_BINARY_FUNC_BODY)
+DEF_VX_BINARY_CASE_3_WRAP(T, SAT_U_SUB_FUNC_WRAP(T), sat_sub, 
VX_BINARY_FUNC_BODY)
 
 /* { dg-final { scan-assembler-not {vadd.vx} } } */
 /* { dg-final { scan-assembler-not {vsub.vx} } } */
@@ -30,3 +31,4 @@ DEF_VX_BINARY_CASE_3_WRAP(T, SAT_U_ADD_FUNC_WRAP(T), sat_add, 
VX_BINARY_FUNC_BOD
 /* { dg-final { scan-assembler-not {vmaxu.vx} } } */
 /* { dg-final { scan-assembler-not {vminu.vx} } } */
 /* { dg-final { scan-assembler-not {vsaddu.vx} } } */
+/* { dg-final { scan-assembler-not {vssubu.vx} } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx-6-u8.c 
b/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx-6-u8.c
index 91f92457d7a..63cd4490c73 100644
--- a/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx-6-u8.c
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx-6-u8.c
@@ -18,6 +18,7 @@ DEF_VX_BINARY_CASE_3_WRAP(T, MAX_FUNC_1_WARP(T), max, 
VX_BINARY_FUNC_BODY_X8)
 DEF_VX_BINARY_CASE_3_WRAP(T, MIN_FUNC_0_WARP(T), min, VX_BINARY_FUNC_BODY_X8)
 DEF_VX_BINARY_CASE_3_WRAP(T, MIN_FUNC_1_WARP(T), min, VX_BINARY_FUNC_BODY_X8)
 DEF_VX_BINARY_CASE_3_WRAP(T, SAT_U_ADD_FUNC_WRAP(T), sat_add, 
VX_BINARY_FUNC_BODY_X8)
+DEF_VX_BINARY_CASE_3_WRAP(T, SAT_U_SUB_FUNC_WRAP(T), sat_sub, 
VX_BINARY_FUNC_BODY_X8)
 
 /* { dg-final { scan-assembler {vadd.vx} } } */
 /* { dg-final { scan-assembler {vsub.vx} } } */
@@ -30,3 +31,4 @@ DEF_VX_BINARY_CASE_3_WRAP(T, SAT_U_ADD_FUNC_WRAP(T), sat_add, 
VX_BINARY_FUNC_BOD
 /* { dg-final { scan-assembler {vmaxu.vx} } } */
 /* { dg-final { scan-assembler {vminu.vx} } } */
 /* { dg-final { scan-assembler {vsaddu.vx} } } */
+/* { dg-final { scan-assembler {vssubu.vx} } } */
-- 
2.43.0

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