[llvm] [Clang][Codegen] fix vector data by modifying VMVN (PR #105913)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-backend-arm

Author: Austin (Zhenhang1213)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/105913.diff


1 Files Affected:

- (modified) llvm/lib/Target/ARM/ARMISelLowering.cpp (+1-1) 


``````````diff
diff --git a/llvm/lib/Target/ARM/ARMISelLowering.cpp b/llvm/lib/Target/ARM/ARMISelLowering.cpp
index 1e8bb8a495e68b..96e4cbb26a5a7b 100644
--- a/llvm/lib/Target/ARM/ARMISelLowering.cpp
+++ b/llvm/lib/Target/ARM/ARMISelLowering.cpp
@@ -7976,7 +7976,7 @@ SDValue ARMTargetLowering::LowerBUILD_VECTOR(SDValue Op, SelectionDAG &DAG,
           VT, ST->hasMVEIntegerOps() ? MVEVMVNModImm : VMVNModImm);
       if (Val.getNode()) {
         SDValue Vmov = DAG.getNode(ARMISD::VMVNIMM, dl, VmovVT, Val);
-        return DAG.getNode(ISD::BITCAST, dl, VT, Vmov);
+        return DAG.getNode(ARMISD::VECTOR_REG_CAST, dl, VT, Vmov);
       }
 
       // Use vmov.f32 to materialize other v2f32 and v4f32 splats.

``````````

</details>


https://github.com/llvm/llvm-project/pull/105913