[X86] fix typo: `MCVTTP2SIS` -> `MCVTTP2UIS` (#171229)

This LLVM IR

https://godbolt.org/z/5bM1vrMY1

```llvm
define <4 x i32> @masked(<2 x double> %a, <4 x i32> %src, i8 noundef zeroext %mask) unnamed_addr #0 {
  %r = tail call <4 x i32> @llvm.x86.avx10.mask.vcvttpd2udqs.128(<2 x double> %a, <4 x i32> %src, i8 noundef %mask)
  ret <4 x i32> %r
}

define <4 x i32> @unmasked(<2 x double> %a) unnamed_addr #0 {
  %r = tail call <4 x i32> @llvm.x86.avx10.mask.vcvttpd2udqs.128(<2 x double> %a, <4 x i32> zeroinitializer, i8 noundef -1)
  ret <4 x i32> %r
}

declare <4 x i32> @llvm.x86.avx10.mask.vcvttpd2udqs.128(<2 x double>, <4 x i32>, i8) unnamed_addr

attributes #0 = { mustprogress nofree norecurse nosync nounwind nonlazybind willreturn memory(none) uwtable "probe-stack"="inline-asm" "target-cpu"="x86-64" "target-features"="+avx10.2-512" }
```

produces 

```asm
masked:                                 # @masked
        kmovd   k1, edi
        vcvttpd2dqs     xmm1 {k1}, xmm0
        vmovaps xmm0, xmm1
        ret
unmasked:                               # @unmasked
        vcvttpd2udqs    xmm0, xmm0
        ret
```

So, when a mask is used, somehow the signed version of this instruction
is selected. I suspect this is a typo.

0 files changed, 0 insertions, 0 deletions