[llvm] [IR][REVEC] Define llvm.vector.broadcast intrinsic (PR #208212)

[Benjamin Maxwell via llvm-commits]

=?utf-8?q?Gaëtan?= Bossu <gaetan.bossu at arm.com>,
=?utf-8?q?Gaëtan?= Bossu <gaetan.bossu at arm.com>,
=?utf-8?q?Gaëtan?= Bossu <gaetan.bossu at arm.com>,
=?utf-8?q?Gaëtan?= Bossu <gaetan.bossu at arm.com>,
=?utf-8?q?Gaëtan?= Bossu <gaetan.bossu at arm.com>,
=?utf-8?q?Gaëtan?= Bossu <gaetan.bossu at arm.com>,
=?utf-8?q?Gaëtan?= Bossu <gaetan.bossu at arm.com>,
=?utf-8?q?Gaëtan?= Bossu <gaetan.bossu at arm.com>
Message-ID:
In-Reply-To: <llvm.org/llvm/llvm-project/pull/208212 at github.com>


================
@@ -32179,6 +32245,26 @@ void AArch64TargetLowering::ReplaceNodeResults(
   case ISD::BITCAST:
     ReplaceBITCASTResults(N, Results, DAG);
     return;
+  case ISD::VECTOR_BROADCAST: {
+    EVT VT = N->getValueType(0);
+    EVT PromotedVT = getTypeToTransformTo(*DAG.getContext(), VT);
+    EVT PromotedInVT = N->getOperand(0).getValueType().changeVectorElementType(
+        *DAG.getContext(), PromotedVT.getVectorElementType());
+    if (!PromotedInVT.isFixedLengthVector() ||
----------------
MacDue wrote:

```suggestion
    if (PromotedInVT.isScalableVector() ||
```

https://github.com/llvm/llvm-project/pull/208212