load all fallback device libraries when loading kernel from file

Signed-off-by: Ge Jin <[email protected]>

Author: jinge90

sycl/include/CL/sycl/detail/pi.hpp

@@ -245,6 +245,7 @@ class DeviceBinaryImage {
     ConstIterator begin() const { return ConstIterator(Begin); }
     ConstIterator end() const { return ConstIterator(End); }
     friend class DeviceBinaryImage;
+    bool isAvailable() const { return !(Begin == nullptr); }
 
   private:
     PropertyRange() : Begin(nullptr), End(nullptr) {}

sycl/source/detail/program_manager/program_manager.cpp

@@ -982,10 +982,16 @@ void ProgramManager::flushSpecConstants(const program_impl &Prg,
   Prg.flush_spec_constants(*Img, NativePrg);
 }
 
+// If the kernel is loaded from spv file, it may not include DeviceLib require
+// mask, sycl runtime won't know which fallback device libraries are needed. In
+// such case, the safest way is to load all fallback device libraries.
 uint32_t ProgramManager::getDeviceLibReqMask(const RTDeviceBinaryImage &Img) {
   const pi::DeviceBinaryImage::PropertyRange &DLMRange =
       Img.getDeviceLibReqMask();
-  return pi::DeviceBinaryProperty(*(DLMRange.begin())).asUint32();
+  if (DLMRange.isAvailable())
+    return pi::DeviceBinaryProperty(*(DLMRange.begin())).asUint32();
+  else
+    return 0xFFFFFFFF;
 }
 
 } // namespace detail