[AMDGPU][ISel] Set trunc store action to expand for v4f32->v4bf16

Author: shiltian

llvm/lib/Target/AMDGPU/AMDGPUISelLowering.cpp

@@ -313,11 +313,16 @@ AMDGPUTargetLowering::AMDGPUTargetLowering(const TargetMachine &TM,
 
   setTruncStoreAction(MVT::f32, MVT::bf16, Expand);
   setTruncStoreAction(MVT::f32, MVT::f16, Expand);
+  setTruncStoreAction(MVT::v2f32, MVT::v2bf16, Expand);
   setTruncStoreAction(MVT::v2f32, MVT::v2f16, Expand);
   setTruncStoreAction(MVT::v3f32, MVT::v3f16, Expand);
+  setTruncStoreAction(MVT::v4f32, MVT::v4bf16, Expand);
   setTruncStoreAction(MVT::v4f32, MVT::v4f16, Expand);
+  setTruncStoreAction(MVT::v8f32, MVT::v8bf16, Expand);
   setTruncStoreAction(MVT::v8f32, MVT::v8f16, Expand);
+  setTruncStoreAction(MVT::v16f32, MVT::v16bf16, Expand);
   setTruncStoreAction(MVT::v16f32, MVT::v16f16, Expand);
+  setTruncStoreAction(MVT::v32f32, MVT::v32bf16, Expand);
   setTruncStoreAction(MVT::v32f32, MVT::v32f16, Expand);
 
   setTruncStoreAction(MVT::f64, MVT::bf16, Expand);