[gcc r17-3547] RISC-V: Add test cases for vwsubu.vx reg overlap

https://gcc.gnu.org/g:3efd8b919ef012283b9790273389452a031bd82f

commit r17-3547-g3efd8b919ef012283b9790273389452a031bd82f
Author: Pan Li <[email protected]>
Date:   Thu Aug 20 08:49:16 2026 +0800

    RISC-V: Add test cases for vwsubu.vx reg overlap
    
    Add test cases for register group overlap, please
    note it is not overlap as much as possible.
    
    gcc/testsuite/ChangeLog:
    
            * gcc.target/riscv/rvv/autovec/group_overlap/vwsubu_vx-u16-m1.c: New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vwsubu_vx-u16-m2.c: New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vwsubu_vx-u16-m4.c: New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vwsubu_vx-u16-mf2.c: New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vwsubu_vx-u16-mf4.c: New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vwsubu_vx-u32-m1.c: New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vwsubu_vx-u32-m2.c: New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vwsubu_vx-u32-m4.c: New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vwsubu_vx-u32-mf2.c: New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vwsubu_vx-u8-m1.c: New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vwsubu_vx-u8-m2.c: New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vwsubu_vx-u8-m4.c: New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vwsubu_vx-u8-mf2.c: New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vwsubu_vx-u8-mf4.c: New test.
            * gcc.target/riscv/rvv/autovec/group_overlap/vwsubu_vx-u8-mf8.c: New test.
    
    Signed-off-by: Pan Li <[email protected]>

Diff:
---
 .../rvv/autovec/group_overlap/vwsubu_vx-u16-m1.c      | 18 ++++++++++++++++++
 .../rvv/autovec/group_overlap/vwsubu_vx-u16-m2.c      | 18 ++++++++++++++++++
 .../rvv/autovec/group_overlap/vwsubu_vx-u16-m4.c      | 18 ++++++++++++++++++
 .../rvv/autovec/group_overlap/vwsubu_vx-u16-mf2.c     | 19 +++++++++++++++++++
 .../rvv/autovec/group_overlap/vwsubu_vx-u16-mf4.c     | 19 +++++++++++++++++++
 .../rvv/autovec/group_overlap/vwsubu_vx-u32-m1.c      | 18 ++++++++++++++++++
 .../rvv/autovec/group_overlap/vwsubu_vx-u32-m2.c      | 18 ++++++++++++++++++
 .../rvv/autovec/group_overlap/vwsubu_vx-u32-m4.c      | 18 ++++++++++++++++++
 .../rvv/autovec/group_overlap/vwsubu_vx-u32-mf2.c     | 19 +++++++++++++++++++
 .../riscv/rvv/autovec/group_overlap/vwsubu_vx-u8-m1.c | 18 ++++++++++++++++++
 .../riscv/rvv/autovec/group_overlap/vwsubu_vx-u8-m2.c | 18 ++++++++++++++++++
 .../riscv/rvv/autovec/group_overlap/vwsubu_vx-u8-m4.c | 18 ++++++++++++++++++
 .../rvv/autovec/group_overlap/vwsubu_vx-u8-mf2.c      | 19 +++++++++++++++++++
 .../rvv/autovec/group_overlap/vwsubu_vx-u8-mf4.c      | 19 +++++++++++++++++++
 .../rvv/autovec/group_overlap/vwsubu_vx-u8-mf8.c      | 19 +++++++++++++++++++
 15 files changed, 276 insertions(+)

diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwsubu_vx-u16-m1.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwsubu_vx-u16-m1.c
new file mode 100644
index 000000000000..7446ba48cdb3
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwsubu_vx-u16-m1.c
@@ -0,0 +1,18 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv64gcv -mabi=lp64d" } */
+
+#include "group_overlap.h"
+
+DEF_GROUP_OVERLAP_BINARY_3(
+  __riscv_vsetvlmax_e16m1,
+  vuint16m1_t,
+  vuint32m2_t,
+  uint16_t,
+  __riscv_vle16_v_u16m1,
+  __riscv_vwsubu_vx_u32m2,
+  __riscv_vse32_v_u32m2,
+  vwsubu_vx,
+  LOOP_DUAL_WIDEN_BINARY_VX_BODY_X16)
+
+/* { dg-final { scan-assembler-times {vwsubu\.vx\s+v0,v1,} 1 } } */
+/* { dg-final { scan-assembler-times {vwsubu\.vx\s+v2,v3,} 1 } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwsubu_vx-u16-m2.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwsubu_vx-u16-m2.c
new file mode 100644
index 000000000000..ab5d89cddfac
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwsubu_vx-u16-m2.c
@@ -0,0 +1,18 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv64gcv -mabi=lp64d" } */
+
+#include "group_overlap.h"
+
+DEF_GROUP_OVERLAP_BINARY_3(
+  __riscv_vsetvlmax_e16m2,
+  vuint16m2_t,
+  vuint32m4_t,
+  uint16_t,
+  __riscv_vle16_v_u16m2,
+  __riscv_vwsubu_vx_u32m4,
+  __riscv_vse32_v_u32m4,
+  vwsubu_vx,
+  LOOP_DUAL_WIDEN_BINARY_VX_BODY_X8)
+
+/* { dg-final { scan-assembler-times {vwsubu\.vx\s+v0,v2,} 1 } } */
+/* { dg-final { scan-assembler-times {vwsubu\.vx\s+v4,v6,} 1 } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwsubu_vx-u16-m4.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwsubu_vx-u16-m4.c
new file mode 100644
index 000000000000..d266db5e6271
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwsubu_vx-u16-m4.c
@@ -0,0 +1,18 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv64gcv -mabi=lp64d" } */
+
+#include "group_overlap.h"
+
+DEF_GROUP_OVERLAP_BINARY_3(
+  __riscv_vsetvlmax_e16m4,
+  vuint16m4_t,
+  vuint32m8_t,
+  uint16_t,
+  __riscv_vle16_v_u16m4,
+  __riscv_vwsubu_vx_u32m8,
+  __riscv_vse32_v_u32m8,
+  vwsubu_vx,
+  LOOP_DUAL_WIDEN_BINARY_VX_BODY_X4)
+
+/* { dg-final { scan-assembler-times {vwsubu\.vx\s+v0,v4,} 1 } } */
+/* { dg-final { scan-assembler-times {vwsubu\.vx\s+v8,v12,} 1 } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwsubu_vx-u16-mf2.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwsubu_vx-u16-mf2.c
new file mode 100644
index 000000000000..c0d26a961ab8
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwsubu_vx-u16-mf2.c
@@ -0,0 +1,19 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv64gcv -mabi=lp64d" } */
+
+#include "group_overlap.h"
+
+DEF_GROUP_OVERLAP_BINARY_3(
+  __riscv_vsetvlmax_e16m1,
+  vuint16mf2_t,
+  vuint32m1_t,
+  uint16_t,
+  __riscv_vle16_v_u16mf2,
+  __riscv_vwsubu_vx_u32m1,
+  __riscv_vse32_v_u32m1,
+  vwsubu_vx,
+  LOOP_DUAL_WIDEN_BINARY_VX_BODY_X16)
+
+/* The fractional LMUL source has EMUL < 1, thus the widened destination
+   register group must not overlap the source at all.  */
+/* { dg-final { scan-assembler-not {vwsubu\.vx\s+(v[0-9]+),\1,} } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwsubu_vx-u16-mf4.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwsubu_vx-u16-mf4.c
new file mode 100644
index 000000000000..f71c2b72ab2d
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwsubu_vx-u16-mf4.c
@@ -0,0 +1,19 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv64gcv -mabi=lp64d" } */
+
+#include "group_overlap.h"
+
+DEF_GROUP_OVERLAP_BINARY_3(
+  __riscv_vsetvlmax_e16m1,
+  vuint16mf4_t,
+  vuint32mf2_t,
+  uint16_t,
+  __riscv_vle16_v_u16mf4,
+  __riscv_vwsubu_vx_u32mf2,
+  __riscv_vse32_v_u32mf2,
+  vwsubu_vx,
+  LOOP_DUAL_WIDEN_BINARY_VX_BODY_X16)
+
+/* The fractional LMUL source has EMUL < 1, thus the widened destination
+   register group must not overlap the source at all.  */
+/* { dg-final { scan-assembler-not {vwsubu\.vx\s+(v[0-9]+),\1,} } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwsubu_vx-u32-m1.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwsubu_vx-u32-m1.c
new file mode 100644
index 000000000000..708c478d7a44
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwsubu_vx-u32-m1.c
@@ -0,0 +1,18 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv64gcv -mabi=lp64d" } */
+
+#include "group_overlap.h"
+
+DEF_GROUP_OVERLAP_BINARY_3(
+  __riscv_vsetvlmax_e32m1,
+  vuint32m1_t,
+  vuint64m2_t,
+  uint32_t,
+  __riscv_vle32_v_u32m1,
+  __riscv_vwsubu_vx_u64m2,
+  __riscv_vse64_v_u64m2,
+  vwsubu_vx,
+  LOOP_DUAL_WIDEN_BINARY_VX_BODY_X16)
+
+/* { dg-final { scan-assembler-times {vwsubu\.vx\s+v0,v1,} 1 } } */
+/* { dg-final { scan-assembler-times {vwsubu\.vx\s+v2,v3,} 1 } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwsubu_vx-u32-m2.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwsubu_vx-u32-m2.c
new file mode 100644
index 000000000000..50ed6f82f640
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwsubu_vx-u32-m2.c
@@ -0,0 +1,18 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv64gcv -mabi=lp64d" } */
+
+#include "group_overlap.h"
+
+DEF_GROUP_OVERLAP_BINARY_3(
+  __riscv_vsetvlmax_e32m2,
+  vuint32m2_t,
+  vuint64m4_t,
+  uint32_t,
+  __riscv_vle32_v_u32m2,
+  __riscv_vwsubu_vx_u64m4,
+  __riscv_vse64_v_u64m4,
+  vwsubu_vx,
+  LOOP_DUAL_WIDEN_BINARY_VX_BODY_X8)
+
+/* { dg-final { scan-assembler-times {vwsubu\.vx\s+v0,v2,} 1 } } */
+/* { dg-final { scan-assembler-times {vwsubu\.vx\s+v4,v6,} 1 } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwsubu_vx-u32-m4.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwsubu_vx-u32-m4.c
new file mode 100644
index 000000000000..5e14a5914d9d
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwsubu_vx-u32-m4.c
@@ -0,0 +1,18 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv64gcv -mabi=lp64d" } */
+
+#include "group_overlap.h"
+
+DEF_GROUP_OVERLAP_BINARY_3(
+  __riscv_vsetvlmax_e32m4,
+  vuint32m4_t,
+  vuint64m8_t,
+  uint32_t,
+  __riscv_vle32_v_u32m4,
+  __riscv_vwsubu_vx_u64m8,
+  __riscv_vse64_v_u64m8,
+  vwsubu_vx,
+  LOOP_DUAL_WIDEN_BINARY_VX_BODY_X4)
+
+/* { dg-final { scan-assembler-times {vwsubu\.vx\s+v0,v4,} 1 } } */
+/* { dg-final { scan-assembler-times {vwsubu\.vx\s+v8,v12,} 1 } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwsubu_vx-u32-mf2.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwsubu_vx-u32-mf2.c
new file mode 100644
index 000000000000..95f1c344245b
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwsubu_vx-u32-mf2.c
@@ -0,0 +1,19 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv64gcv -mabi=lp64d" } */
+
+#include "group_overlap.h"
+
+DEF_GROUP_OVERLAP_BINARY_3(
+  __riscv_vsetvlmax_e32m1,
+  vuint32mf2_t,
+  vuint64m1_t,
+  uint32_t,
+  __riscv_vle32_v_u32mf2,
+  __riscv_vwsubu_vx_u64m1,
+  __riscv_vse64_v_u64m1,
+  vwsubu_vx,
+  LOOP_DUAL_WIDEN_BINARY_VX_BODY_X16)
+
+/* The fractional LMUL source has EMUL < 1, thus the widened destination
+   register group must not overlap the source at all.  */
+/* { dg-final { scan-assembler-not {vwsubu\.vx\s+(v[0-9]+),\1,} } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwsubu_vx-u8-m1.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwsubu_vx-u8-m1.c
new file mode 100644
index 000000000000..064cf93cd21d
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwsubu_vx-u8-m1.c
@@ -0,0 +1,18 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv64gcv -mabi=lp64d" } */
+
+#include "group_overlap.h"
+
+DEF_GROUP_OVERLAP_BINARY_3(
+  __riscv_vsetvlmax_e8m1,
+  vuint8m1_t,
+  vuint16m2_t,
+  uint8_t,
+  __riscv_vle8_v_u8m1,
+  __riscv_vwsubu_vx_u16m2,
+  __riscv_vse16_v_u16m2,
+  vwsubu_vx,
+  LOOP_DUAL_WIDEN_BINARY_VX_BODY_X16)
+
+/* { dg-final { scan-assembler-times {vwsubu\.vx\s+v0,v1,} 1 } } */
+/* { dg-final { scan-assembler-times {vwsubu\.vx\s+v2,v3,} 1 } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwsubu_vx-u8-m2.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwsubu_vx-u8-m2.c
new file mode 100644
index 000000000000..50b1b4ab6283
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwsubu_vx-u8-m2.c
@@ -0,0 +1,18 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv64gcv -mabi=lp64d" } */
+
+#include "group_overlap.h"
+
+DEF_GROUP_OVERLAP_BINARY_3(
+  __riscv_vsetvlmax_e8m2,
+  vuint8m2_t,
+  vuint16m4_t,
+  uint8_t,
+  __riscv_vle8_v_u8m2,
+  __riscv_vwsubu_vx_u16m4,
+  __riscv_vse16_v_u16m4,
+  vwsubu_vx,
+  LOOP_DUAL_WIDEN_BINARY_VX_BODY_X8)
+
+/* { dg-final { scan-assembler-times {vwsubu\.vx\s+v0,v2,} 1 } } */
+/* { dg-final { scan-assembler-times {vwsubu\.vx\s+v4,v6,} 1 } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwsubu_vx-u8-m4.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwsubu_vx-u8-m4.c
new file mode 100644
index 000000000000..3ec5de92768e
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwsubu_vx-u8-m4.c
@@ -0,0 +1,18 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv64gcv -mabi=lp64d" } */
+
+#include "group_overlap.h"
+
+DEF_GROUP_OVERLAP_BINARY_3(
+  __riscv_vsetvlmax_e8m4,
+  vuint8m4_t,
+  vuint16m8_t,
+  uint8_t,
+  __riscv_vle8_v_u8m4,
+  __riscv_vwsubu_vx_u16m8,
+  __riscv_vse16_v_u16m8,
+  vwsubu_vx,
+  LOOP_DUAL_WIDEN_BINARY_VX_BODY_X4)
+
+/* { dg-final { scan-assembler-times {vwsubu\.vx\s+v0,v4,} 1 } } */
+/* { dg-final { scan-assembler-times {vwsubu\.vx\s+v8,v12,} 1 } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwsubu_vx-u8-mf2.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwsubu_vx-u8-mf2.c
new file mode 100644
index 000000000000..2406ecc62743
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwsubu_vx-u8-mf2.c
@@ -0,0 +1,19 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv64gcv -mabi=lp64d" } */
+
+#include "group_overlap.h"
+
+DEF_GROUP_OVERLAP_BINARY_3(
+  __riscv_vsetvlmax_e8m1,
+  vuint8mf2_t,
+  vuint16m1_t,
+  uint8_t,
+  __riscv_vle8_v_u8mf2,
+  __riscv_vwsubu_vx_u16m1,
+  __riscv_vse16_v_u16m1,
+  vwsubu_vx,
+  LOOP_DUAL_WIDEN_BINARY_VX_BODY_X16)
+
+/* The fractional LMUL source has EMUL < 1, thus the widened destination
+   register group must not overlap the source at all.  */
+/* { dg-final { scan-assembler-not {vwsubu\.vx\s+(v[0-9]+),\1,} } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwsubu_vx-u8-mf4.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwsubu_vx-u8-mf4.c
new file mode 100644
index 000000000000..3fef856926f7
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwsubu_vx-u8-mf4.c
@@ -0,0 +1,19 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv64gcv -mabi=lp64d" } */
+
+#include "group_overlap.h"
+
+DEF_GROUP_OVERLAP_BINARY_3(
+  __riscv_vsetvlmax_e8m1,
+  vuint8mf4_t,
+  vuint16mf2_t,
+  uint8_t,
+  __riscv_vle8_v_u8mf4,
+  __riscv_vwsubu_vx_u16mf2,
+  __riscv_vse16_v_u16mf2,
+  vwsubu_vx,
+  LOOP_DUAL_WIDEN_BINARY_VX_BODY_X16)
+
+/* The fractional LMUL source has EMUL < 1, thus the widened destination
+   register group must not overlap the source at all.  */
+/* { dg-final { scan-assembler-not {vwsubu\.vx\s+(v[0-9]+),\1,} } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwsubu_vx-u8-mf8.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwsubu_vx-u8-mf8.c
new file mode 100644
index 000000000000..af2690b807fc
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwsubu_vx-u8-mf8.c
@@ -0,0 +1,19 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv64gcv -mabi=lp64d" } */
+
+#include "group_overlap.h"
+
+DEF_GROUP_OVERLAP_BINARY_3(
+  __riscv_vsetvlmax_e8m1,
+  vuint8mf8_t,
+  vuint16mf4_t,
+  uint8_t,
+  __riscv_vle8_v_u8mf8,
+  __riscv_vwsubu_vx_u16mf4,
+  __riscv_vse16_v_u16mf4,
+  vwsubu_vx,
+  LOOP_DUAL_WIDEN_BINARY_VX_BODY_X16)
+
+/* The fractional LMUL source has EMUL < 1, thus the widened destination
+   register group must not overlap the source at all.  */
+/* { dg-final { scan-assembler-not {vwsubu\.vx\s+(v[0-9]+),\1,} } } */