================
@@ -7254,6 +7255,10 @@ static SDValue
lowerBuildVectorAsBroadcast(BuildVectorSDNode *BVOp,
EVT CVT = Ld.getValueType();
assert(!CVT.isVector() && "Must not broadcast a vector type");
+ // 512 bit vpbroadcastw is only available with AVX512BW
+ if (ScalarSize == 16 && IsGT256 && !Subtarget.hasBWI())
+ return SDValue();
----------------
phoebewang wrote:
The problem only exists for `v32f16` which is not handled by
`PreprocessISelDAG`. Maybe we need add `v32f16` support there.
https://github.com/llvm/llvm-project/pull/73186
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