AMDGPU: During img instruction ret value construction cater for non i…

…nt values

Make sure return type is int type.

Differential Revision: https://reviews.llvm.org/D108131

Change-Id: Ic02f07d1234cd51b6ed78c3fecd2cb1d6acd5644

llvm/lib/Target/AMDGPU/SIISelLowering.cpp

@@ -5948,6 +5948,9 @@ static SDValue constructRetValue(SelectionDAG &DAG,
 
   EVT LegalReqRetVT = ReqRetVT;
   if (!ReqRetVT.isVector()) {
+    if (!Data.getValueType().isInteger())
+      Data = DAG.getNode(ISD::BITCAST, DL,
+                         Data.getValueType().changeTypeToInteger(), Data);
     Data = DAG.getNode(ISD::TRUNCATE, DL, ReqRetVT.changeTypeToInteger(), Data);
   } else {
     // We need to widen the return vector to a legal type