From: Pan Li <[email protected]>
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/group_overlap.h:
Add test helper macros.
* gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i16-m1.c: New
test.
* gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i16-m2.c: New
test.
* gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i16-m4.c: New
test.
* gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i16-mf2.c: New
test.
* gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i16-mf4.c: New
test.
* gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i32-m1.c: New
test.
* gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i32-m2.c: New
test.
* gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i32-m4.c: New
test.
* gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i32-mf2.c: New
test.
* gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i8-m1.c: New
test.
* gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i8-m2.c: New
test.
* gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i8-m4.c: New
test.
* gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i8-mf2.c: New
test.
* gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i8-mf4.c: New
test.
* gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i8-mf8.c: New
test.
Signed-off-by: Pan Li <[email protected]>
---
.../rvv/autovec/group_overlap/group_overlap.h | 230 ++++++++++++++++++
.../autovec/group_overlap/vwmacc_vv-i16-m1.c | 57 +++++
.../autovec/group_overlap/vwmacc_vv-i16-m2.c | 49 ++++
.../autovec/group_overlap/vwmacc_vv-i16-m4.c | 45 ++++
.../autovec/group_overlap/vwmacc_vv-i16-mf2.c | 21 ++
.../autovec/group_overlap/vwmacc_vv-i16-mf4.c | 21 ++
.../autovec/group_overlap/vwmacc_vv-i32-m1.c | 57 +++++
.../autovec/group_overlap/vwmacc_vv-i32-m2.c | 49 ++++
.../autovec/group_overlap/vwmacc_vv-i32-m4.c | 45 ++++
.../autovec/group_overlap/vwmacc_vv-i32-mf2.c | 21 ++
.../autovec/group_overlap/vwmacc_vv-i8-m1.c | 57 +++++
.../autovec/group_overlap/vwmacc_vv-i8-m2.c | 49 ++++
.../autovec/group_overlap/vwmacc_vv-i8-m4.c | 45 ++++
.../autovec/group_overlap/vwmacc_vv-i8-mf2.c | 21 ++
.../autovec/group_overlap/vwmacc_vv-i8-mf4.c | 21 ++
.../autovec/group_overlap/vwmacc_vv-i8-mf8.c | 21 ++
16 files changed, 809 insertions(+)
create mode 100644
gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i16-m1.c
create mode 100644
gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i16-m2.c
create mode 100644
gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i16-m4.c
create mode 100644
gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i16-mf2.c
create mode 100644
gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i16-mf4.c
create mode 100644
gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i32-m1.c
create mode 100644
gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i32-m2.c
create mode 100644
gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i32-m4.c
create mode 100644
gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i32-mf2.c
create mode 100644
gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i8-m1.c
create mode 100644
gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i8-m2.c
create mode 100644
gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i8-m4.c
create mode 100644
gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i8-mf2.c
create mode 100644
gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i8-mf4.c
create mode 100644
gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i8-mf8.c
diff --git
a/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/group_overlap.h
b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/group_overlap.h
index 9d6e5f2b804..ac2abed02ba 100644
--- a/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/group_overlap.h
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/group_overlap.h
@@ -533,6 +533,205 @@
ST_F ((void *)out, vd14, VL); OUT += VL; \
ST_F ((void *)out, vd15, VL); OUT += VL; \
+#define LOOP_DUAL_WIDEN_TERNARY_BODY_X4(NT, WT, LD_NF, LD_WF, OUT_F, ST_F, \
+ OUT, START, VL) \
+ NT vs0 = LD_NF ((void *)START, VL); START += VL; \
+ NT vs1 = LD_NF ((void *)START, VL); START += VL; \
+ NT vs2 = LD_NF ((void *)START, VL); START += VL; \
+ NT vs3 = LD_NF ((void *)START, VL); START += VL; \
+ NT vt0 = LD_NF ((void *)START, VL); START += VL; \
+ NT vt1 = LD_NF ((void *)START, VL); START += VL; \
+ NT vt2 = LD_NF ((void *)START, VL); START += VL; \
+ NT vt3 = LD_NF ((void *)START, VL); START += VL; \
+ WT vw0 = LD_WF ((void *)START, VL); START += VL; \
+ WT vw1 = LD_WF ((void *)START, VL); START += VL; \
+ WT vw2 = LD_WF ((void *)START, VL); START += VL; \
+ WT vw3 = LD_WF ((void *)START, VL); START += VL; \
+ \
+ asm volatile("nop" ::: "memory"); \
+ \
+ WT vd0 = OUT_F (vw0, vs0, vt0, VL); \
+ WT vd1 = OUT_F (vw1, vs1, vt1, VL); \
+ WT vd2 = OUT_F (vw2, vs2, vt2, VL); \
+ WT vd3 = OUT_F (vw3, vs3, vt3, VL); \
+ \
+ asm volatile("nop" ::: "memory"); \
+ \
+ ST_F ((void *)out, vd0, VL); OUT += VL; \
+ ST_F ((void *)out, vd1, VL); OUT += VL; \
+ ST_F ((void *)out, vd2, VL); OUT += VL; \
+ ST_F ((void *)out, vd3, VL); OUT += VL; \
+
+#define LOOP_DUAL_WIDEN_TERNARY_BODY_X8(NT, WT, LD_NF, LD_WF, OUT_F, ST_F, \
+ OUT, START, VL) \
+ NT vs0 = LD_NF ((void *)START, VL); START += VL; \
+ NT vs1 = LD_NF ((void *)START, VL); START += VL; \
+ NT vs2 = LD_NF ((void *)START, VL); START += VL; \
+ NT vs3 = LD_NF ((void *)START, VL); START += VL; \
+ NT vs4 = LD_NF ((void *)START, VL); START += VL; \
+ NT vs5 = LD_NF ((void *)START, VL); START += VL; \
+ NT vs6 = LD_NF ((void *)START, VL); START += VL; \
+ NT vs7 = LD_NF ((void *)START, VL); START += VL; \
+ NT vt0 = LD_NF ((void *)START, VL); START += VL; \
+ NT vt1 = LD_NF ((void *)START, VL); START += VL; \
+ NT vt2 = LD_NF ((void *)START, VL); START += VL; \
+ NT vt3 = LD_NF ((void *)START, VL); START += VL; \
+ NT vt4 = LD_NF ((void *)START, VL); START += VL; \
+ NT vt5 = LD_NF ((void *)START, VL); START += VL; \
+ NT vt6 = LD_NF ((void *)START, VL); START += VL; \
+ NT vt7 = LD_NF ((void *)START, VL); START += VL; \
+ WT vw0 = LD_WF ((void *)START, VL); START += VL; \
+ WT vw1 = LD_WF ((void *)START, VL); START += VL; \
+ WT vw2 = LD_WF ((void *)START, VL); START += VL; \
+ WT vw3 = LD_WF ((void *)START, VL); START += VL; \
+ WT vw4 = LD_WF ((void *)START, VL); START += VL; \
+ WT vw5 = LD_WF ((void *)START, VL); START += VL; \
+ WT vw6 = LD_WF ((void *)START, VL); START += VL; \
+ WT vw7 = LD_WF ((void *)START, VL); START += VL; \
+ \
+ asm volatile("nop" ::: "memory"); \
+ \
+ WT vd0 = OUT_F (vw0, vs0, vt0, VL); \
+ WT vd1 = OUT_F (vw1, vs1, vt1, VL); \
+ WT vd2 = OUT_F (vw2, vs2, vt2, VL); \
+ WT vd3 = OUT_F (vw3, vs3, vt3, VL); \
+ WT vd4 = OUT_F (vw4, vs4, vt4, VL); \
+ WT vd5 = OUT_F (vw5, vs5, vt5, VL); \
+ WT vd6 = OUT_F (vw6, vs6, vt6, VL); \
+ WT vd7 = OUT_F (vw7, vs7, vt7, VL); \
+ \
+ asm volatile("nop" ::: "memory"); \
+ \
+ ST_F ((void *)out, vd0, VL); OUT += VL; \
+ ST_F ((void *)out, vd1, VL); OUT += VL; \
+ ST_F ((void *)out, vd2, VL); OUT += VL; \
+ ST_F ((void *)out, vd3, VL); OUT += VL; \
+ ST_F ((void *)out, vd4, VL); OUT += VL; \
+ ST_F ((void *)out, vd5, VL); OUT += VL; \
+ ST_F ((void *)out, vd6, VL); OUT += VL; \
+ ST_F ((void *)out, vd7, VL); OUT += VL; \
+
+#define LOOP_DUAL_WIDEN_TERNARY_BODY_X16(NT, WT, LD_NF, LD_WF, OUT_F, ST_F, \
+ OUT, START, VL) \
+ NT vs0 = LD_NF ((void *)START, VL); START += VL; \
+ NT vs1 = LD_NF ((void *)START, VL); START += VL; \
+ NT vs2 = LD_NF ((void *)START, VL); START += VL; \
+ NT vs3 = LD_NF ((void *)START, VL); START += VL; \
+ NT vs4 = LD_NF ((void *)START, VL); START += VL; \
+ NT vs5 = LD_NF ((void *)START, VL); START += VL; \
+ NT vs6 = LD_NF ((void *)START, VL); START += VL; \
+ NT vs7 = LD_NF ((void *)START, VL); START += VL; \
+ NT vs8 = LD_NF ((void *)START, VL); START += VL; \
+ NT vs9 = LD_NF ((void *)START, VL); START += VL; \
+ NT vs10 = LD_NF ((void *)START, VL); START += VL; \
+ NT vs11 = LD_NF ((void *)START, VL); START += VL; \
+ NT vs12 = LD_NF ((void *)START, VL); START += VL; \
+ NT vs13 = LD_NF ((void *)START, VL); START += VL; \
+ NT vs14 = LD_NF ((void *)START, VL); START += VL; \
+ NT vs15 = LD_NF ((void *)START, VL); START += VL; \
+ NT vt0 = LD_NF ((void *)START, VL); START += VL; \
+ NT vt1 = LD_NF ((void *)START, VL); START += VL; \
+ NT vt2 = LD_NF ((void *)START, VL); START += VL; \
+ NT vt3 = LD_NF ((void *)START, VL); START += VL; \
+ NT vt4 = LD_NF ((void *)START, VL); START += VL; \
+ NT vt5 = LD_NF ((void *)START, VL); START += VL; \
+ NT vt6 = LD_NF ((void *)START, VL); START += VL; \
+ NT vt7 = LD_NF ((void *)START, VL); START += VL; \
+ NT vt8 = LD_NF ((void *)START, VL); START += VL; \
+ NT vt9 = LD_NF ((void *)START, VL); START += VL; \
+ NT vt10 = LD_NF ((void *)START, VL); START += VL; \
+ NT vt11 = LD_NF ((void *)START, VL); START += VL; \
+ NT vt12 = LD_NF ((void *)START, VL); START += VL; \
+ NT vt13 = LD_NF ((void *)START, VL); START += VL; \
+ NT vt14 = LD_NF ((void *)START, VL); START += VL; \
+ NT vt15 = LD_NF ((void *)START, VL); START += VL; \
+ WT vw0 = LD_WF ((void *)START, VL); START += VL; \
+ WT vw1 = LD_WF ((void *)START, VL); START += VL; \
+ WT vw2 = LD_WF ((void *)START, VL); START += VL; \
+ WT vw3 = LD_WF ((void *)START, VL); START += VL; \
+ WT vw4 = LD_WF ((void *)START, VL); START += VL; \
+ WT vw5 = LD_WF ((void *)START, VL); START += VL; \
+ WT vw6 = LD_WF ((void *)START, VL); START += VL; \
+ WT vw7 = LD_WF ((void *)START, VL); START += VL; \
+ WT vw8 = LD_WF ((void *)START, VL); START += VL; \
+ WT vw9 = LD_WF ((void *)START, VL); START += VL; \
+ WT vw10 = LD_WF ((void *)START, VL); START += VL; \
+ WT vw11 = LD_WF ((void *)START, VL); START += VL; \
+ WT vw12 = LD_WF ((void *)START, VL); START += VL; \
+ WT vw13 = LD_WF ((void *)START, VL); START += VL; \
+ WT vw14 = LD_WF ((void *)START, VL); START += VL; \
+ WT vw15 = LD_WF ((void *)START, VL); START += VL; \
+ \
+ asm volatile("nop" ::: "memory"); \
+ \
+ WT vd0 = OUT_F (vw0, vs0, vt0, VL); \
+ WT vd1 = OUT_F (vw1, vs1, vt1, VL); \
+ WT vd2 = OUT_F (vw2, vs2, vt2, VL); \
+ WT vd3 = OUT_F (vw3, vs3, vt3, VL); \
+ WT vd4 = OUT_F (vw4, vs4, vt4, VL); \
+ WT vd5 = OUT_F (vw5, vs5, vt5, VL); \
+ WT vd6 = OUT_F (vw6, vs6, vt6, VL); \
+ WT vd7 = OUT_F (vw7, vs7, vt7, VL); \
+ WT vd8 = OUT_F (vw8, vs8, vt8, VL); \
+ WT vd9 = OUT_F (vw9, vs9, vt9, VL); \
+ WT vd10 = OUT_F (vw10, vs10, vt10, VL); \
+ WT vd11 = OUT_F (vw11, vs11, vt11, VL); \
+ WT vd12 = OUT_F (vw12, vs12, vt12, VL); \
+ WT vd13 = OUT_F (vw13, vs13, vt13, VL); \
+ WT vd14 = OUT_F (vw14, vs14, vt14, VL); \
+ WT vd15 = OUT_F (vw15, vs15, vt15, VL); \
+ \
+ asm volatile("nop" ::: "memory"); \
+ \
+ ST_F ((void *)out, vd0, VL); OUT += VL; \
+ ST_F ((void *)out, vd1, VL); OUT += VL; \
+ ST_F ((void *)out, vd2, VL); OUT += VL; \
+ ST_F ((void *)out, vd3, VL); OUT += VL; \
+ ST_F ((void *)out, vd4, VL); OUT += VL; \
+ ST_F ((void *)out, vd5, VL); OUT += VL; \
+ ST_F ((void *)out, vd6, VL); OUT += VL; \
+ ST_F ((void *)out, vd7, VL); OUT += VL; \
+ ST_F ((void *)out, vd8, VL); OUT += VL; \
+ ST_F ((void *)out, vd9, VL); OUT += VL; \
+ ST_F ((void *)out, vd10, VL); OUT += VL; \
+ ST_F ((void *)out, vd11, VL); OUT += VL; \
+ ST_F ((void *)out, vd12, VL); OUT += VL; \
+ ST_F ((void *)out, vd13, VL); OUT += VL; \
+ ST_F ((void *)out, vd14, VL); OUT += VL; \
+ ST_F ((void *)out, vd15, VL); OUT += VL; \
+
+/* The widened destination register group of a dual widen ternary insn is tied
+ to the accumulator, which is still live when the narrowed sources are read.
+ Feeding one narrowed source from the highest-numbered half of the
+ accumulator's own register group is thus the only way the sources can
+ legally overlap the destination register group: the shared registers hold
+ one single value, seen as the accumulator's high part and as the narrowed
+ source at the same time. RI_F reinterprets the widened type as the
+ narrowed element type, GET_F extracts the highest-numbered half of it. */
+#define LOOP_DUAL_WIDEN_TERNARY_BODY_OVERLAP_X2(NT, WT, WNT, LD_NF, LD_WF, \
+ RI_F, GET_F, OUT_F, ST_F, \
+ OUT, START, VL) \
+ NT vt0 = LD_NF ((void *)START, VL); START += VL; \
+ NT vt1 = LD_NF ((void *)START, VL); START += VL; \
+ WT vw0 = LD_WF ((void *)START, VL); START += VL; \
+ WT vw1 = LD_WF ((void *)START, VL); START += VL; \
+ \
+ asm volatile("nop" ::: "memory"); \
+ \
+ WNT vr0 = RI_F (vw0); \
+ WNT vr1 = RI_F (vw1); \
+ \
+ NT vs0 = GET_F (vr0, 1); \
+ NT vs1 = GET_F (vr1, 1); \
+ \
+ WT vd0 = OUT_F (vw0, vs0, vt0, VL); \
+ WT vd1 = OUT_F (vw1, vs1, vt1, VL); \
+ \
+ asm volatile("nop" ::: "memory"); \
+ \
+ ST_F ((void *)out, vd0, VL); OUT += VL; \
+ ST_F ((void *)out, vd1, VL); OUT += VL; \
+
#define DEF_GROUP_OVERLAP_UNARY_0(VL_F, NT, WT, LD_F, OUT_F, ST_F, NAME, \
LOOP_BODY) \
void test_group_overlap_##NAME##_##NT##_unary_0(uint8_t *data, \
@@ -594,4 +793,35 @@
} \
}
+#define DEF_GROUP_OVERLAP_TERNARY_0(VL_F, NT, WT, LD_NF, LD_WF, OUT_F, \
+ ST_F, NAME, LOOP_BODY) \
+ void test_group_overlap_##NAME##_##NT##_ternary_0(uint8_t *data, \
+ uint8_t *out, \
+ size_t limit) \
+ { \
+ uint8_t *start = data; \
+ uint8_t *end = data + limit; \
+ size_t vl = VL_F (); \
+ \
+ while (start < end) { \
+ LOOP_BODY (NT, WT, LD_NF, LD_WF, OUT_F, ST_F, out, start, vl); \
+ } \
+ }
+
+#define DEF_GROUP_OVERLAP_TERNARY_1(VL_F, NT, WT, WNT, LD_NF, LD_WF, RI_F, \
+ GET_F, OUT_F, ST_F, NAME, LOOP_BODY) \
+ void test_group_overlap_##NAME##_##NT##_ternary_1(uint8_t *data, \
+ uint8_t *out, \
+ size_t limit) \
+ { \
+ uint8_t *start = data; \
+ uint8_t *end = data + limit; \
+ size_t vl = VL_F (); \
+ \
+ while (start < end) { \
+ LOOP_BODY (NT, WT, WNT, LD_NF, LD_WF, RI_F, GET_F, OUT_F, ST_F, out, \
+ start, vl); \
+ } \
+ }
+
#endif
diff --git
a/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i16-m1.c
b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i16-m1.c
new file mode 100644
index 00000000000..79f34b2aa0b
--- /dev/null
+++
b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i16-m1.c
@@ -0,0 +1,57 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv64gcv -mabi=lp64d" } */
+
+#include "group_overlap.h"
+
+DEF_GROUP_OVERLAP_TERNARY_0(
+ __riscv_vsetvlmax_e16m1,
+ vint16m1_t,
+ vint32m2_t,
+ __riscv_vle16_v_i16m1,
+ __riscv_vle32_v_i32m2,
+ __riscv_vwmacc_vv_i32m2,
+ __riscv_vse32_v_i32m2,
+ vwmacc_vv,
+ LOOP_DUAL_WIDEN_TERNARY_BODY_X16)
+
+DEF_GROUP_OVERLAP_TERNARY_1(
+ __riscv_vsetvlmax_e16m1,
+ vint16m1_t,
+ vint32m2_t,
+ vint16m2_t,
+ __riscv_vle16_v_i16m1,
+ __riscv_vle32_v_i32m2,
+ __riscv_vreinterpret_v_i32m2_i16m2,
+ __riscv_vget_v_i16m2_i16m1,
+ __riscv_vwmacc_vv_i32m2,
+ __riscv_vse32_v_i32m2,
+ vwmacc_vv,
+ LOOP_DUAL_WIDEN_TERNARY_BODY_OVERLAP_X2)
+
+/* ternary_0: the accumulator occupies the whole destination register group and
+ is live when the narrowed sources are read, so no source can be allocated
+ inside the destination register group. */
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v12,v30,v29([^0-9]|$)} 1 }
} */
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v4,v16,v15([^0-9]|$)} 1 } }
*/
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v2,v0,v31([^0-9]|$)} 1 } }
*/
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v8,v14,v1([^0-9]|$)} 1 } }
*/
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v30,v28,v27([^0-9]|$)} 1 }
} */
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v28,v26,v25([^0-9]|$)} 1 }
} */
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v6,v20,v19([^0-9]|$)} 1 } }
*/
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v26,v24,v23([^0-9]|$)} 1 }
} */
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v2,v18,v17([^0-9]|$)} 1 } }
*/
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v10,v1,v15([^0-9]|$)} 1 } }
*/
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v24,v22,v21([^0-9]|$)} 1 }
} */
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v14,v19,v17([^0-9]|$)} 1 }
} */
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v16,v21,v23([^0-9]|$)} 1 }
} */
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v18,v20,v22([^0-9]|$)} 1 }
} */
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v20,v0,v1([^0-9]|$)} 1 } }
*/
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v22,v0,v1([^0-9]|$)} 1 } }
*/
+
+/* ternary_1: each narrowed source is the highest-numbered half of its own
+ accumulator, thus it overlaps the highest-numbered part of the destination
+ register group. Without the group overlap the sources would have to be
+ copied out to a disjoint register group first. */
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v4,v5,v8([^0-9]|$)} 1 } } */
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v2,v3,v1([^0-9]|$)} 1 } } */
+/* { dg-final { scan-assembler-not {vmv[0-9]+r\.v} } } */
diff --git
a/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i16-m2.c
b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i16-m2.c
new file mode 100644
index 00000000000..0d6660b5cb6
--- /dev/null
+++
b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i16-m2.c
@@ -0,0 +1,49 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv64gcv -mabi=lp64d" } */
+
+#include "group_overlap.h"
+
+DEF_GROUP_OVERLAP_TERNARY_0(
+ __riscv_vsetvlmax_e16m2,
+ vint16m2_t,
+ vint32m4_t,
+ __riscv_vle16_v_i16m2,
+ __riscv_vle32_v_i32m4,
+ __riscv_vwmacc_vv_i32m4,
+ __riscv_vse32_v_i32m4,
+ vwmacc_vv,
+ LOOP_DUAL_WIDEN_TERNARY_BODY_X8)
+
+DEF_GROUP_OVERLAP_TERNARY_1(
+ __riscv_vsetvlmax_e16m2,
+ vint16m2_t,
+ vint32m4_t,
+ vint16m4_t,
+ __riscv_vle16_v_i16m2,
+ __riscv_vle32_v_i32m4,
+ __riscv_vreinterpret_v_i32m4_i16m4,
+ __riscv_vget_v_i16m4_i16m2,
+ __riscv_vwmacc_vv_i32m4,
+ __riscv_vse32_v_i32m4,
+ vwmacc_vv,
+ LOOP_DUAL_WIDEN_TERNARY_BODY_OVERLAP_X2)
+
+/* ternary_0: the accumulator occupies the whole destination register group and
+ is live when the narrowed sources are read, so no source can be allocated
+ inside the destination register group. */
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v8,v0,v30([^0-9]|$)} 1 } }
*/
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v0,v28,v26([^0-9]|$)} 1 } }
*/
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v28,v24,v22([^0-9]|$)} 1 }
} */
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v24,v20,v18([^0-9]|$)} 1 }
} */
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v20,v16,v14([^0-9]|$)} 1 }
} */
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v16,v12,v10([^0-9]|$)} 1 }
} */
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v12,v8,v6([^0-9]|$)} 1 } }
*/
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v8,v4,v2([^0-9]|$)} 1 } } */
+
+/* ternary_1: each narrowed source is the highest-numbered half of its own
+ accumulator, thus it overlaps the highest-numbered part of the destination
+ register group. Without the group overlap the sources would have to be
+ copied out to a disjoint register group first. */
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v8,v10,v16([^0-9]|$)} 1 } }
*/
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v4,v6,v2([^0-9]|$)} 1 } } */
+/* { dg-final { scan-assembler-not {vmv[0-9]+r\.v} } } */
diff --git
a/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i16-m4.c
b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i16-m4.c
new file mode 100644
index 00000000000..7568c6a871a
--- /dev/null
+++
b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i16-m4.c
@@ -0,0 +1,45 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv64gcv -mabi=lp64d" } */
+
+#include "group_overlap.h"
+
+DEF_GROUP_OVERLAP_TERNARY_0(
+ __riscv_vsetvlmax_e16m4,
+ vint16m4_t,
+ vint32m8_t,
+ __riscv_vle16_v_i16m4,
+ __riscv_vle32_v_i32m8,
+ __riscv_vwmacc_vv_i32m8,
+ __riscv_vse32_v_i32m8,
+ vwmacc_vv,
+ LOOP_DUAL_WIDEN_TERNARY_BODY_X4)
+
+DEF_GROUP_OVERLAP_TERNARY_1(
+ __riscv_vsetvlmax_e16m4,
+ vint16m4_t,
+ vint32m8_t,
+ vint16m8_t,
+ __riscv_vle16_v_i16m4,
+ __riscv_vle32_v_i32m8,
+ __riscv_vreinterpret_v_i32m8_i16m8,
+ __riscv_vget_v_i16m8_i16m4,
+ __riscv_vwmacc_vv_i32m8,
+ __riscv_vse32_v_i32m8,
+ vwmacc_vv,
+ LOOP_DUAL_WIDEN_TERNARY_BODY_OVERLAP_X2)
+
+/* ternary_0: the accumulator occupies the whole destination register group and
+ is live when the narrowed sources are read, so no source can be allocated
+ inside the destination register group. */
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v16,v0,v4([^0-9]|$)} 1 } }
*/
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v0,v28,v20([^0-9]|$)} 1 } }
*/
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v24,v16,v12([^0-9]|$)} 1 }
} */
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v16,v8,v12([^0-9]|$)} 1 } }
*/
+
+/* ternary_1: each narrowed source is the highest-numbered half of its own
+ accumulator, thus it overlaps the highest-numbered part of the destination
+ register group. Without the group overlap the sources would have to be
+ copied out to a disjoint register group first. */
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v16,v20,v0([^0-9]|$)} 1 } }
*/
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v8,v12,v4([^0-9]|$)} 1 } }
*/
+/* { dg-final { scan-assembler-not {vmv[0-9]+r\.v} } } */
diff --git
a/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i16-mf2.c
b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i16-mf2.c
new file mode 100644
index 00000000000..f90ed36ffa6
--- /dev/null
+++
b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i16-mf2.c
@@ -0,0 +1,21 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv64gcv -mabi=lp64d" } */
+
+#include "group_overlap.h"
+
+DEF_GROUP_OVERLAP_TERNARY_0(
+ __riscv_vsetvlmax_e16m1,
+ vint16mf2_t,
+ vint32m1_t,
+ __riscv_vle16_v_i16mf2,
+ __riscv_vle32_v_i32m1,
+ __riscv_vwmacc_vv_i32m1,
+ __riscv_vse32_v_i32m1,
+ vwmacc_vv,
+ LOOP_DUAL_WIDEN_TERNARY_BODY_X16)
+
+/* The fractional LMUL source has EMUL < 1, thus the widened destination
+ register group must not overlap either source at all. */
+/* { dg-final { scan-assembler-times {vwmacc\.vv} 16 } } */
+/* { dg-final { scan-assembler-not {vwmacc\.vv\s+(v[0-9]+),\1,} } } */
+/* { dg-final { scan-assembler-not
{vwmacc\.vv\s+(v[0-9]+),v[0-9]+,\1([^0-9]|$)} } } */
diff --git
a/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i16-mf4.c
b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i16-mf4.c
new file mode 100644
index 00000000000..6f7544fd19d
--- /dev/null
+++
b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i16-mf4.c
@@ -0,0 +1,21 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv64gcv -mabi=lp64d" } */
+
+#include "group_overlap.h"
+
+DEF_GROUP_OVERLAP_TERNARY_0(
+ __riscv_vsetvlmax_e16m1,
+ vint16mf4_t,
+ vint32mf2_t,
+ __riscv_vle16_v_i16mf4,
+ __riscv_vle32_v_i32mf2,
+ __riscv_vwmacc_vv_i32mf2,
+ __riscv_vse32_v_i32mf2,
+ vwmacc_vv,
+ LOOP_DUAL_WIDEN_TERNARY_BODY_X16)
+
+/* The fractional LMUL source has EMUL < 1, thus the widened destination
+ register group must not overlap either source at all. */
+/* { dg-final { scan-assembler-times {vwmacc\.vv} 16 } } */
+/* { dg-final { scan-assembler-not {vwmacc\.vv\s+(v[0-9]+),\1,} } } */
+/* { dg-final { scan-assembler-not
{vwmacc\.vv\s+(v[0-9]+),v[0-9]+,\1([^0-9]|$)} } } */
diff --git
a/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i32-m1.c
b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i32-m1.c
new file mode 100644
index 00000000000..bfd25e177d8
--- /dev/null
+++
b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i32-m1.c
@@ -0,0 +1,57 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv64gcv -mabi=lp64d" } */
+
+#include "group_overlap.h"
+
+DEF_GROUP_OVERLAP_TERNARY_0(
+ __riscv_vsetvlmax_e32m1,
+ vint32m1_t,
+ vint64m2_t,
+ __riscv_vle32_v_i32m1,
+ __riscv_vle64_v_i64m2,
+ __riscv_vwmacc_vv_i64m2,
+ __riscv_vse64_v_i64m2,
+ vwmacc_vv,
+ LOOP_DUAL_WIDEN_TERNARY_BODY_X16)
+
+DEF_GROUP_OVERLAP_TERNARY_1(
+ __riscv_vsetvlmax_e32m1,
+ vint32m1_t,
+ vint64m2_t,
+ vint32m2_t,
+ __riscv_vle32_v_i32m1,
+ __riscv_vle64_v_i64m2,
+ __riscv_vreinterpret_v_i64m2_i32m2,
+ __riscv_vget_v_i32m2_i32m1,
+ __riscv_vwmacc_vv_i64m2,
+ __riscv_vse64_v_i64m2,
+ vwmacc_vv,
+ LOOP_DUAL_WIDEN_TERNARY_BODY_OVERLAP_X2)
+
+/* ternary_0: the accumulator occupies the whole destination register group and
+ is live when the narrowed sources are read, so no source can be allocated
+ inside the destination register group. */
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v12,v30,v29([^0-9]|$)} 1 }
} */
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v4,v16,v15([^0-9]|$)} 1 } }
*/
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v2,v0,v31([^0-9]|$)} 1 } }
*/
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v8,v14,v1([^0-9]|$)} 1 } }
*/
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v30,v28,v27([^0-9]|$)} 1 }
} */
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v28,v26,v25([^0-9]|$)} 1 }
} */
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v6,v20,v19([^0-9]|$)} 1 } }
*/
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v26,v24,v23([^0-9]|$)} 1 }
} */
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v2,v18,v17([^0-9]|$)} 1 } }
*/
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v10,v1,v15([^0-9]|$)} 1 } }
*/
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v24,v22,v21([^0-9]|$)} 1 }
} */
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v14,v19,v17([^0-9]|$)} 1 }
} */
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v16,v21,v23([^0-9]|$)} 1 }
} */
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v18,v20,v22([^0-9]|$)} 1 }
} */
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v20,v0,v1([^0-9]|$)} 1 } }
*/
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v22,v0,v1([^0-9]|$)} 1 } }
*/
+
+/* ternary_1: each narrowed source is the highest-numbered half of its own
+ accumulator, thus it overlaps the highest-numbered part of the destination
+ register group. Without the group overlap the sources would have to be
+ copied out to a disjoint register group first. */
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v4,v5,v8([^0-9]|$)} 1 } } */
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v2,v3,v1([^0-9]|$)} 1 } } */
+/* { dg-final { scan-assembler-not {vmv[0-9]+r\.v} } } */
diff --git
a/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i32-m2.c
b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i32-m2.c
new file mode 100644
index 00000000000..a24c7410bc0
--- /dev/null
+++
b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i32-m2.c
@@ -0,0 +1,49 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv64gcv -mabi=lp64d" } */
+
+#include "group_overlap.h"
+
+DEF_GROUP_OVERLAP_TERNARY_0(
+ __riscv_vsetvlmax_e32m2,
+ vint32m2_t,
+ vint64m4_t,
+ __riscv_vle32_v_i32m2,
+ __riscv_vle64_v_i64m4,
+ __riscv_vwmacc_vv_i64m4,
+ __riscv_vse64_v_i64m4,
+ vwmacc_vv,
+ LOOP_DUAL_WIDEN_TERNARY_BODY_X8)
+
+DEF_GROUP_OVERLAP_TERNARY_1(
+ __riscv_vsetvlmax_e32m2,
+ vint32m2_t,
+ vint64m4_t,
+ vint32m4_t,
+ __riscv_vle32_v_i32m2,
+ __riscv_vle64_v_i64m4,
+ __riscv_vreinterpret_v_i64m4_i32m4,
+ __riscv_vget_v_i32m4_i32m2,
+ __riscv_vwmacc_vv_i64m4,
+ __riscv_vse64_v_i64m4,
+ vwmacc_vv,
+ LOOP_DUAL_WIDEN_TERNARY_BODY_OVERLAP_X2)
+
+/* ternary_0: the accumulator occupies the whole destination register group and
+ is live when the narrowed sources are read, so no source can be allocated
+ inside the destination register group. */
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v8,v0,v30([^0-9]|$)} 1 } }
*/
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v0,v28,v26([^0-9]|$)} 1 } }
*/
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v28,v24,v22([^0-9]|$)} 1 }
} */
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v24,v20,v18([^0-9]|$)} 1 }
} */
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v20,v16,v14([^0-9]|$)} 1 }
} */
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v16,v12,v10([^0-9]|$)} 1 }
} */
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v12,v8,v6([^0-9]|$)} 1 } }
*/
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v8,v4,v2([^0-9]|$)} 1 } } */
+
+/* ternary_1: each narrowed source is the highest-numbered half of its own
+ accumulator, thus it overlaps the highest-numbered part of the destination
+ register group. Without the group overlap the sources would have to be
+ copied out to a disjoint register group first. */
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v8,v10,v16([^0-9]|$)} 1 } }
*/
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v4,v6,v2([^0-9]|$)} 1 } } */
+/* { dg-final { scan-assembler-not {vmv[0-9]+r\.v} } } */
diff --git
a/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i32-m4.c
b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i32-m4.c
new file mode 100644
index 00000000000..17490d331e0
--- /dev/null
+++
b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i32-m4.c
@@ -0,0 +1,45 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv64gcv -mabi=lp64d" } */
+
+#include "group_overlap.h"
+
+DEF_GROUP_OVERLAP_TERNARY_0(
+ __riscv_vsetvlmax_e32m4,
+ vint32m4_t,
+ vint64m8_t,
+ __riscv_vle32_v_i32m4,
+ __riscv_vle64_v_i64m8,
+ __riscv_vwmacc_vv_i64m8,
+ __riscv_vse64_v_i64m8,
+ vwmacc_vv,
+ LOOP_DUAL_WIDEN_TERNARY_BODY_X4)
+
+DEF_GROUP_OVERLAP_TERNARY_1(
+ __riscv_vsetvlmax_e32m4,
+ vint32m4_t,
+ vint64m8_t,
+ vint32m8_t,
+ __riscv_vle32_v_i32m4,
+ __riscv_vle64_v_i64m8,
+ __riscv_vreinterpret_v_i64m8_i32m8,
+ __riscv_vget_v_i32m8_i32m4,
+ __riscv_vwmacc_vv_i64m8,
+ __riscv_vse64_v_i64m8,
+ vwmacc_vv,
+ LOOP_DUAL_WIDEN_TERNARY_BODY_OVERLAP_X2)
+
+/* ternary_0: the accumulator occupies the whole destination register group and
+ is live when the narrowed sources are read, so no source can be allocated
+ inside the destination register group. */
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v16,v0,v4([^0-9]|$)} 1 } }
*/
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v0,v28,v20([^0-9]|$)} 1 } }
*/
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v24,v16,v12([^0-9]|$)} 1 }
} */
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v16,v8,v12([^0-9]|$)} 1 } }
*/
+
+/* ternary_1: each narrowed source is the highest-numbered half of its own
+ accumulator, thus it overlaps the highest-numbered part of the destination
+ register group. Without the group overlap the sources would have to be
+ copied out to a disjoint register group first. */
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v16,v20,v0([^0-9]|$)} 1 } }
*/
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v8,v12,v4([^0-9]|$)} 1 } }
*/
+/* { dg-final { scan-assembler-not {vmv[0-9]+r\.v} } } */
diff --git
a/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i32-mf2.c
b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i32-mf2.c
new file mode 100644
index 00000000000..2b7c19cd537
--- /dev/null
+++
b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i32-mf2.c
@@ -0,0 +1,21 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv64gcv -mabi=lp64d" } */
+
+#include "group_overlap.h"
+
+DEF_GROUP_OVERLAP_TERNARY_0(
+ __riscv_vsetvlmax_e32m1,
+ vint32mf2_t,
+ vint64m1_t,
+ __riscv_vle32_v_i32mf2,
+ __riscv_vle64_v_i64m1,
+ __riscv_vwmacc_vv_i64m1,
+ __riscv_vse64_v_i64m1,
+ vwmacc_vv,
+ LOOP_DUAL_WIDEN_TERNARY_BODY_X16)
+
+/* The fractional LMUL source has EMUL < 1, thus the widened destination
+ register group must not overlap either source at all. */
+/* { dg-final { scan-assembler-times {vwmacc\.vv} 16 } } */
+/* { dg-final { scan-assembler-not {vwmacc\.vv\s+(v[0-9]+),\1,} } } */
+/* { dg-final { scan-assembler-not
{vwmacc\.vv\s+(v[0-9]+),v[0-9]+,\1([^0-9]|$)} } } */
diff --git
a/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i8-m1.c
b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i8-m1.c
new file mode 100644
index 00000000000..a6399818a70
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i8-m1.c
@@ -0,0 +1,57 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv64gcv -mabi=lp64d" } */
+
+#include "group_overlap.h"
+
+DEF_GROUP_OVERLAP_TERNARY_0(
+ __riscv_vsetvlmax_e8m1,
+ vint8m1_t,
+ vint16m2_t,
+ __riscv_vle8_v_i8m1,
+ __riscv_vle16_v_i16m2,
+ __riscv_vwmacc_vv_i16m2,
+ __riscv_vse16_v_i16m2,
+ vwmacc_vv,
+ LOOP_DUAL_WIDEN_TERNARY_BODY_X16)
+
+DEF_GROUP_OVERLAP_TERNARY_1(
+ __riscv_vsetvlmax_e8m1,
+ vint8m1_t,
+ vint16m2_t,
+ vint8m2_t,
+ __riscv_vle8_v_i8m1,
+ __riscv_vle16_v_i16m2,
+ __riscv_vreinterpret_v_i16m2_i8m2,
+ __riscv_vget_v_i8m2_i8m1,
+ __riscv_vwmacc_vv_i16m2,
+ __riscv_vse16_v_i16m2,
+ vwmacc_vv,
+ LOOP_DUAL_WIDEN_TERNARY_BODY_OVERLAP_X2)
+
+/* ternary_0: the accumulator occupies the whole destination register group and
+ is live when the narrowed sources are read, so no source can be allocated
+ inside the destination register group. */
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v12,v30,v29([^0-9]|$)} 1 }
} */
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v4,v16,v15([^0-9]|$)} 1 } }
*/
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v2,v0,v31([^0-9]|$)} 1 } }
*/
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v8,v14,v1([^0-9]|$)} 1 } }
*/
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v30,v28,v27([^0-9]|$)} 1 }
} */
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v28,v26,v25([^0-9]|$)} 1 }
} */
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v6,v20,v19([^0-9]|$)} 1 } }
*/
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v26,v24,v23([^0-9]|$)} 1 }
} */
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v2,v18,v17([^0-9]|$)} 1 } }
*/
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v10,v1,v15([^0-9]|$)} 1 } }
*/
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v24,v22,v21([^0-9]|$)} 1 }
} */
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v14,v19,v17([^0-9]|$)} 1 }
} */
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v16,v21,v23([^0-9]|$)} 1 }
} */
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v18,v20,v22([^0-9]|$)} 1 }
} */
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v20,v0,v1([^0-9]|$)} 1 } }
*/
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v22,v0,v1([^0-9]|$)} 1 } }
*/
+
+/* ternary_1: each narrowed source is the highest-numbered half of its own
+ accumulator, thus it overlaps the highest-numbered part of the destination
+ register group. Without the group overlap the sources would have to be
+ copied out to a disjoint register group first. */
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v4,v5,v8([^0-9]|$)} 1 } } */
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v2,v3,v1([^0-9]|$)} 1 } } */
+/* { dg-final { scan-assembler-not {vmv[0-9]+r\.v} } } */
diff --git
a/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i8-m2.c
b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i8-m2.c
new file mode 100644
index 00000000000..a8e4628a8c5
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i8-m2.c
@@ -0,0 +1,49 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv64gcv -mabi=lp64d" } */
+
+#include "group_overlap.h"
+
+DEF_GROUP_OVERLAP_TERNARY_0(
+ __riscv_vsetvlmax_e8m2,
+ vint8m2_t,
+ vint16m4_t,
+ __riscv_vle8_v_i8m2,
+ __riscv_vle16_v_i16m4,
+ __riscv_vwmacc_vv_i16m4,
+ __riscv_vse16_v_i16m4,
+ vwmacc_vv,
+ LOOP_DUAL_WIDEN_TERNARY_BODY_X8)
+
+DEF_GROUP_OVERLAP_TERNARY_1(
+ __riscv_vsetvlmax_e8m2,
+ vint8m2_t,
+ vint16m4_t,
+ vint8m4_t,
+ __riscv_vle8_v_i8m2,
+ __riscv_vle16_v_i16m4,
+ __riscv_vreinterpret_v_i16m4_i8m4,
+ __riscv_vget_v_i8m4_i8m2,
+ __riscv_vwmacc_vv_i16m4,
+ __riscv_vse16_v_i16m4,
+ vwmacc_vv,
+ LOOP_DUAL_WIDEN_TERNARY_BODY_OVERLAP_X2)
+
+/* ternary_0: the accumulator occupies the whole destination register group and
+ is live when the narrowed sources are read, so no source can be allocated
+ inside the destination register group. */
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v8,v0,v30([^0-9]|$)} 1 } }
*/
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v0,v28,v26([^0-9]|$)} 1 } }
*/
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v28,v24,v22([^0-9]|$)} 1 }
} */
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v24,v20,v18([^0-9]|$)} 1 }
} */
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v20,v16,v14([^0-9]|$)} 1 }
} */
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v16,v12,v10([^0-9]|$)} 1 }
} */
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v12,v8,v6([^0-9]|$)} 1 } }
*/
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v8,v4,v2([^0-9]|$)} 1 } } */
+
+/* ternary_1: each narrowed source is the highest-numbered half of its own
+ accumulator, thus it overlaps the highest-numbered part of the destination
+ register group. Without the group overlap the sources would have to be
+ copied out to a disjoint register group first. */
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v8,v10,v16([^0-9]|$)} 1 } }
*/
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v4,v6,v2([^0-9]|$)} 1 } } */
+/* { dg-final { scan-assembler-not {vmv[0-9]+r\.v} } } */
diff --git
a/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i8-m4.c
b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i8-m4.c
new file mode 100644
index 00000000000..67c647f4ca8
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i8-m4.c
@@ -0,0 +1,45 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv64gcv -mabi=lp64d" } */
+
+#include "group_overlap.h"
+
+DEF_GROUP_OVERLAP_TERNARY_0(
+ __riscv_vsetvlmax_e8m4,
+ vint8m4_t,
+ vint16m8_t,
+ __riscv_vle8_v_i8m4,
+ __riscv_vle16_v_i16m8,
+ __riscv_vwmacc_vv_i16m8,
+ __riscv_vse16_v_i16m8,
+ vwmacc_vv,
+ LOOP_DUAL_WIDEN_TERNARY_BODY_X4)
+
+DEF_GROUP_OVERLAP_TERNARY_1(
+ __riscv_vsetvlmax_e8m4,
+ vint8m4_t,
+ vint16m8_t,
+ vint8m8_t,
+ __riscv_vle8_v_i8m4,
+ __riscv_vle16_v_i16m8,
+ __riscv_vreinterpret_v_i16m8_i8m8,
+ __riscv_vget_v_i8m8_i8m4,
+ __riscv_vwmacc_vv_i16m8,
+ __riscv_vse16_v_i16m8,
+ vwmacc_vv,
+ LOOP_DUAL_WIDEN_TERNARY_BODY_OVERLAP_X2)
+
+/* ternary_0: the accumulator occupies the whole destination register group and
+ is live when the narrowed sources are read, so no source can be allocated
+ inside the destination register group. */
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v16,v0,v4([^0-9]|$)} 1 } }
*/
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v0,v28,v20([^0-9]|$)} 1 } }
*/
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v24,v16,v12([^0-9]|$)} 1 }
} */
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v16,v8,v12([^0-9]|$)} 1 } }
*/
+
+/* ternary_1: each narrowed source is the highest-numbered half of its own
+ accumulator, thus it overlaps the highest-numbered part of the destination
+ register group. Without the group overlap the sources would have to be
+ copied out to a disjoint register group first. */
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v16,v20,v0([^0-9]|$)} 1 } }
*/
+/* { dg-final { scan-assembler-times {vwmacc\.vv\s+v8,v12,v4([^0-9]|$)} 1 } }
*/
+/* { dg-final { scan-assembler-not {vmv[0-9]+r\.v} } } */
diff --git
a/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i8-mf2.c
b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i8-mf2.c
new file mode 100644
index 00000000000..c0404d74b4a
--- /dev/null
+++
b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i8-mf2.c
@@ -0,0 +1,21 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv64gcv -mabi=lp64d" } */
+
+#include "group_overlap.h"
+
+DEF_GROUP_OVERLAP_TERNARY_0(
+ __riscv_vsetvlmax_e8m1,
+ vint8mf2_t,
+ vint16m1_t,
+ __riscv_vle8_v_i8mf2,
+ __riscv_vle16_v_i16m1,
+ __riscv_vwmacc_vv_i16m1,
+ __riscv_vse16_v_i16m1,
+ vwmacc_vv,
+ LOOP_DUAL_WIDEN_TERNARY_BODY_X16)
+
+/* The fractional LMUL source has EMUL < 1, thus the widened destination
+ register group must not overlap either source at all. */
+/* { dg-final { scan-assembler-times {vwmacc\.vv} 16 } } */
+/* { dg-final { scan-assembler-not {vwmacc\.vv\s+(v[0-9]+),\1,} } } */
+/* { dg-final { scan-assembler-not
{vwmacc\.vv\s+(v[0-9]+),v[0-9]+,\1([^0-9]|$)} } } */
diff --git
a/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i8-mf4.c
b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i8-mf4.c
new file mode 100644
index 00000000000..11bce6b79a9
--- /dev/null
+++
b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i8-mf4.c
@@ -0,0 +1,21 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv64gcv -mabi=lp64d" } */
+
+#include "group_overlap.h"
+
+DEF_GROUP_OVERLAP_TERNARY_0(
+ __riscv_vsetvlmax_e8m1,
+ vint8mf4_t,
+ vint16mf2_t,
+ __riscv_vle8_v_i8mf4,
+ __riscv_vle16_v_i16mf2,
+ __riscv_vwmacc_vv_i16mf2,
+ __riscv_vse16_v_i16mf2,
+ vwmacc_vv,
+ LOOP_DUAL_WIDEN_TERNARY_BODY_X16)
+
+/* The fractional LMUL source has EMUL < 1, thus the widened destination
+ register group must not overlap either source at all. */
+/* { dg-final { scan-assembler-times {vwmacc\.vv} 16 } } */
+/* { dg-final { scan-assembler-not {vwmacc\.vv\s+(v[0-9]+),\1,} } } */
+/* { dg-final { scan-assembler-not
{vwmacc\.vv\s+(v[0-9]+),v[0-9]+,\1([^0-9]|$)} } } */
diff --git
a/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i8-mf8.c
b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i8-mf8.c
new file mode 100644
index 00000000000..f0704ada805
--- /dev/null
+++
b/gcc/testsuite/gcc.target/riscv/rvv/autovec/group_overlap/vwmacc_vv-i8-mf8.c
@@ -0,0 +1,21 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv64gcv -mabi=lp64d" } */
+
+#include "group_overlap.h"
+
+DEF_GROUP_OVERLAP_TERNARY_0(
+ __riscv_vsetvlmax_e8m1,
+ vint8mf8_t,
+ vint16mf4_t,
+ __riscv_vle8_v_i8mf8,
+ __riscv_vle16_v_i16mf4,
+ __riscv_vwmacc_vv_i16mf4,
+ __riscv_vse16_v_i16mf4,
+ vwmacc_vv,
+ LOOP_DUAL_WIDEN_TERNARY_BODY_X16)
+
+/* The fractional LMUL source has EMUL < 1, thus the widened destination
+ register group must not overlap either source at all. */
+/* { dg-final { scan-assembler-times {vwmacc\.vv} 16 } } */
+/* { dg-final { scan-assembler-not {vwmacc\.vv\s+(v[0-9]+),\1,} } } */
+/* { dg-final { scan-assembler-not
{vwmacc\.vv\s+(v[0-9]+),v[0-9]+,\1([^0-9]|$)} } } */
--
2.43.0
