risc-v: 0.884
vnc: 0.812
graphic: 0.732
device: 0.715
architecture: 0.651
network: 0.594
PID: 0.548
files: 0.540
ppc: 0.537
TCG: 0.526
arm: 0.504
register: 0.490
socket: 0.471
debug: 0.436
permissions: 0.428
semantic: 0.412
performance: 0.403
virtual: 0.401
boot: 0.340
VMM: 0.269
kernel: 0.254
user-level: 0.248
peripherals: 0.221
hypervisor: 0.188
assembly: 0.166
mistranslation: 0.152
x86: 0.127
KVM: 0.074
i386: 0.073

Assertion failure when executing RISC-V vfncvt.rtz.x.f.w instruction
Description of problem:
When emulating the `vfncvt.rtz.x.f.w` instruction, QEMU crashes with an assertion failure at `target/riscv/translate.c:211`, complaining that ```decode_save_opc: Assertion `ctx->insn_start != NULL' failed.```

It appears this problem first emerged with https://gitlab.com/qemu-project/qemu/-/commit/a9814e3e08d2aacbd9018c36c77c2fb652537848
Steps to reproduce:
The following C program triggers the assertion failure when built a sufficiently recent version of the Clang cross compiler (in my case 15.0.6):
```
/* test.c */
#include <riscv_vector.h>

#define LEN 4

int main(int argc, char *argv[]) {
  double in[LEN];
  int out[LEN];

  vfloat64m1_t vf = vle64_v_f64m1(in, LEN);
  vint32mf2_t vi = vfncvt_rtz_x_f_w_i32mf2(vf, LEN);
  vse32_v_i32mf2(out, vi, LEN);

  return 0;
}
```

The above `test.c` can be compiled and run as follows:
```
clang -O3 -march=rv64gcv -static test.c
qemu-riscv64 -cpu "rv64,zba=true,zbb=true,zbc=true,zbs=true,v=true,vlen=512,elen=64,vext_spec=v1.0" a.out
qemu-riscv64: ../target/riscv/translate.c:211: decode_save_opc: Assertion `ctx->insn_start != NULL' failed.
Segmentation fault (core dumped)
```
Additional information: