[llvm] [SDAG][ISel][TableGen][LoongArch] Report error for trivial bitcasts when there are predicate calls (PR #116075)

[Craig Topper via llvm-commits]

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@@ -197,6 +197,17 @@ def vsplati16 : PatFrag<(ops node:$e0),
 def vsplati32 : PatFrag<(ops node:$e0),
                         (v4i32 (build_vector node:$e0, node:$e0,
                                              node:$e0, node:$e0))>;
+// Any build_vector that is a constant splat with a value that equals 1
+// FIXME: These should be a ComplexPattern but we can't use them because the
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topperc wrote:

#116471

https://github.com/llvm/llvm-project/pull/116075