[gcc r14-10056] RISC-V: Add xfail test case for incorrect overlap on v0

[Pan Li <panli@gcc.gnu.org>]

https://gcc.gnu.org/g:d37b34fe82e6e19e80ec9c46400f63fa90ba5255

commit r14-10056-gd37b34fe82e6e19e80ec9c46400f63fa90ba5255
Author: Pan Li <pan2.li@intel.com>
Date:   Sat Apr 20 22:43:13 2024 +0800

    RISC-V: Add xfail test case for incorrect overlap on v0
    
    We reverted below patch for register group overlap, add the related
    insn test and mark it as xfail.  And we will remove the xfail
    after we support the register overlap in GCC-15.
    
    018ba3ac952 RISC-V: Fix overlap group incorrect overlap on v0
    
    The below test suites are passed.
    * The rv64gcv fully regression test.
    
    gcc/testsuite/ChangeLog:
    
            * gcc.target/riscv/rvv/base/pr112431-34.c: New test.
    
    Signed-off-by: Pan Li <pan2.li@intel.com>

Diff:
---
 .../gcc.target/riscv/rvv/base/pr112431-34.c        | 101 +++++++++++++++++++++
 1 file changed, 101 insertions(+)

diff --git a/gcc/testsuite/gcc.target/riscv/rvv/base/pr112431-34.c b/gcc/testsuite/gcc.target/riscv/rvv/base/pr112431-34.c
new file mode 100644
index 00000000000..286185aa01e
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/base/pr112431-34.c
@@ -0,0 +1,101 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv64gcv -mabi=lp64d -O3" } */
+
+#include "riscv_vector.h"
+
+size_t __attribute__ ((noinline))
+sumation (size_t sum0, size_t sum1, size_t sum2, size_t sum3, size_t sum4,
+	  size_t sum5, size_t sum6, size_t sum7, size_t sum8, size_t sum9,
+	  size_t sum10, size_t sum11, size_t sum12, size_t sum13, size_t sum14,
+	  size_t sum15)
+{
+  return sum0 + sum1 + sum2 + sum3 + sum4 + sum5 + sum6 + sum7 + sum8 + sum9
+	 + sum10 + sum11 + sum12 + sum13 + sum14 + sum15;
+}
+
+size_t
+foo (char const *buf, size_t len)
+{
+  size_t sum = 0;
+  size_t vl = __riscv_vsetvlmax_e8m8 ();
+  size_t step = vl * 4;
+  const char *it = buf, *end = buf + len;
+  for (; it + step <= end;)
+    {
+      vuint8m1_t v0 = __riscv_vle8_v_u8m1 ((void *) it, vl);
+      it += vl;
+      vuint8m1_t v1 = __riscv_vle8_v_u8m1 ((void *) it, vl);
+      it += vl;
+      vuint8m1_t v2 = __riscv_vle8_v_u8m1 ((void *) it, vl);
+      it += vl;
+      vuint8m1_t v3 = __riscv_vle8_v_u8m1 ((void *) it, vl);
+      it += vl;
+      vuint8m1_t v4 = __riscv_vle8_v_u8m1 ((void *) it, vl);
+      it += vl;
+      vuint8m1_t v5 = __riscv_vle8_v_u8m1 ((void *) it, vl);
+      it += vl;
+      vuint8m1_t v6 = __riscv_vle8_v_u8m1 ((void *) it, vl);
+      it += vl;
+      vuint8m1_t v7 = __riscv_vle8_v_u8m1 ((void *) it, vl);
+      it += vl;
+      vuint8m1_t v8 = __riscv_vle8_v_u8m1 ((void *) it, vl);
+      it += vl;
+      vuint8m1_t v9 = __riscv_vle8_v_u8m1 ((void *) it, vl);
+      it += vl;
+      vuint8m1_t v10 = __riscv_vle8_v_u8m1 ((void *) it, vl);
+      it += vl;
+      vuint8m1_t v11 = __riscv_vle8_v_u8m1 ((void *) it, vl);
+      it += vl;
+      vuint8m1_t v12 = __riscv_vle8_v_u8m1 ((void *) it, vl);
+      it += vl;
+      vuint8m1_t v13 = __riscv_vle8_v_u8m1 ((void *) it, vl);
+      it += vl;
+      vuint8m1_t v14 = __riscv_vle8_v_u8m1 ((void *) it, vl);
+      it += vl;
+      vuint8m1_t v15 = __riscv_vle8_v_u8m1 ((void *) it, vl);
+      it += vl;
+      
+      asm volatile("nop" ::: "memory");
+      vint16m2_t vw0 = __riscv_vluxei8_v_i16m2 ((void *) it, v0, vl);
+      vint16m2_t vw1 = __riscv_vluxei8_v_i16m2 ((void *) it, v1, vl);
+      vint16m2_t vw2 = __riscv_vluxei8_v_i16m2 ((void *) it, v2, vl);
+      vint16m2_t vw3 = __riscv_vluxei8_v_i16m2 ((void *) it, v3, vl);
+      vint16m2_t vw4 = __riscv_vluxei8_v_i16m2 ((void *) it, v4, vl);
+      vint16m2_t vw5 = __riscv_vluxei8_v_i16m2 ((void *) it, v5, vl);
+      vint16m2_t vw6 = __riscv_vluxei8_v_i16m2 ((void *) it, v6, vl);
+      vint16m2_t vw7 = __riscv_vluxei8_v_i16m2 ((void *) it, v7, vl);
+      vint16m2_t vw8 = __riscv_vluxei8_v_i16m2 ((void *) it, v8, vl);
+      vint16m2_t vw9 = __riscv_vluxei8_v_i16m2 ((void *) it, v9, vl);
+      vint16m2_t vw10 = __riscv_vluxei8_v_i16m2 ((void *) it, v10, vl);
+      vint16m2_t vw11 = __riscv_vluxei8_v_i16m2 ((void *) it, v11, vl);
+      vint16m2_t vw12 = __riscv_vluxei8_v_i16m2 ((void *) it, v12, vl);
+      vint16m2_t vw13 = __riscv_vluxei8_v_i16m2 ((void *) it, v13, vl);
+      vint16m2_t vw14 = __riscv_vluxei8_v_i16m2 ((void *) it, v14, vl);
+      vbool8_t mask = *(vbool8_t*)it;
+      vint16m2_t vw15 = __riscv_vluxei8_v_i16m2_m (mask, (void *) it, v15, vl);
+
+      asm volatile("nop" ::: "memory");
+      size_t sum0 = __riscv_vmv_x_s_i16m2_i16 (vw0);
+      size_t sum1 = __riscv_vmv_x_s_i16m2_i16 (vw1);
+      size_t sum2 = __riscv_vmv_x_s_i16m2_i16 (vw2);
+      size_t sum3 = __riscv_vmv_x_s_i16m2_i16 (vw3);
+      size_t sum4 = __riscv_vmv_x_s_i16m2_i16 (vw4);
+      size_t sum5 = __riscv_vmv_x_s_i16m2_i16 (vw5);
+      size_t sum6 = __riscv_vmv_x_s_i16m2_i16 (vw6);
+      size_t sum7 = __riscv_vmv_x_s_i16m2_i16 (vw7);
+      size_t sum8 = __riscv_vmv_x_s_i16m2_i16 (vw8);
+      size_t sum9 = __riscv_vmv_x_s_i16m2_i16 (vw9);
+      size_t sum10 = __riscv_vmv_x_s_i16m2_i16 (vw10);
+      size_t sum11 = __riscv_vmv_x_s_i16m2_i16 (vw11);
+      size_t sum12 = __riscv_vmv_x_s_i16m2_i16 (vw12);
+      size_t sum13 = __riscv_vmv_x_s_i16m2_i16 (vw13);
+      size_t sum14 = __riscv_vmv_x_s_i16m2_i16 (vw14);
+      size_t sum15 = __riscv_vmv_x_s_i16m2_i16 (vw15);
+
+      sum += sumation (sum0, sum1, sum2, sum3, sum4, sum5, sum6, sum7, sum8,
+		       sum9, sum10, sum11, sum12, sum13, sum14, sum15);
+    }
+  return sum;
+}
+
+/* { dg-final { scan-assembler-not {vluxei8\.v\tv0,\s*\([a-x0-9]+\),\s*v[0-9]+,\s*v0.t} { xfail riscv*-*-* } } } */