Use boolean type for the predicate, even though it should never get emitted.

Author: AlexVlx

clang/lib/CodeGen/CodeGenTypes.cpp

@@ -583,7 +583,7 @@ llvm::Type *CodeGenTypes::ConvertType(QualType T) {
                                     {}, {Scope});
 #define AMDGPU_FEATURE_PREDICATE_TYPE(Name, Id, SingletonId, Width, Align)     \
   case BuiltinType::Id:                                                        \
-    return llvm::IntegerType::getInt1Ty(getLLVMContext());
+    return ConvertType(getContext().getLogicalOperationType());
 #include "clang/Basic/AMDGPUTypes.def"
 #define HLSL_INTANGIBLE_TYPE(Name, Id, SingletonId) case BuiltinType::Id:
 #include "clang/Basic/HLSLIntangibleTypes.def"