[llvm] [Offload] Use llvm::Error throughout liboffload internals (PR #140879)

Ross Brunton via llvm-commits llvm-commits at lists.llvm.org
Wed May 21 03:42:44 PDT 2025


https://github.com/RossBrunton created https://github.com/llvm/llvm-project/pull/140879

This removes the `ol_impl_result_t` helper class, replacing it with
`llvm::Error`. In addition, some internal functions that returned
`ol_errc_t` now return `llvm::Error` (with a fancy message).


>From 19c92101b372a4a024a650b86b10ae6555b00024 Mon Sep 17 00:00:00 2001
From: Ross Brunton <ross at codeplay.com>
Date: Wed, 21 May 2025 11:40:23 +0100
Subject: [PATCH] [Offload] Use llvm::Error throughout liboffload internals

This removes the `ol_impl_result_t` helper class, replacing it with
`llvm::Error`. In addition, some internal functions that returned
`ol_errc_t` now return `llvm::Error` (with a fancy message).
---
 offload/liboffload/include/OffloadImpl.hpp    |  61 ++---
 .../include/generated/OffloadEntryPoints.inc  | 241 +++++++++++-------
 .../generated/OffloadImplFuncDecls.inc        |  75 +++---
 offload/liboffload/src/Helpers.hpp            |  28 +-
 offload/liboffload/src/OffloadImpl.cpp        | 218 ++++++++--------
 .../tools/offload-tblgen/EntryPointGen.cpp    |  11 +-
 offload/tools/offload-tblgen/MiscGen.cpp      |   2 +-
 offload/tools/offload-tblgen/RecordTypes.hpp  |   6 +
 8 files changed, 331 insertions(+), 311 deletions(-)

diff --git a/offload/liboffload/include/OffloadImpl.hpp b/offload/liboffload/include/OffloadImpl.hpp
index 7d5c20bc48670..df7615a657c07 100644
--- a/offload/liboffload/include/OffloadImpl.hpp
+++ b/offload/liboffload/include/OffloadImpl.hpp
@@ -69,48 +69,31 @@ struct ErrPtrHash {
 using ErrSetT = std::unordered_set<ErrPtrT, ErrPtrHash, ErrPtrEqual>;
 ErrSetT &errors();
 
-struct ol_impl_result_t {
-  ol_impl_result_t(std::nullptr_t) : Result(OL_SUCCESS) {}
-  ol_impl_result_t(ol_errc_t Code) {
-    if (Code == OL_ERRC_SUCCESS) {
-      Result = nullptr;
-    } else {
-      auto Err = std::unique_ptr<ol_error_struct_t>(
-          new ol_error_struct_t{Code, nullptr});
-      Result = errors().emplace(std::move(Err)).first->get();
-    }
-  }
-
-  ol_impl_result_t(ol_errc_t Code, llvm::StringRef Details) {
-    assert(Code != OL_ERRC_SUCCESS);
-    Result = nullptr;
-    auto DetailsStr = errorStrs().insert(Details).first->getKeyData();
-    auto Err = std::unique_ptr<ol_error_struct_t>(
-        new ol_error_struct_t{Code, DetailsStr});
-    Result = errors().emplace(std::move(Err)).first->get();
+namespace {
+ol_errc_t GetErrorCode(std::error_code Code) {
+  if (Code.category() ==
+      error::make_error_code(error::ErrorCode::SUCCESS).category()) {
+    return static_cast<ol_errc_t>(Code.value());
   }
+  return OL_ERRC_UNKNOWN;
+}
+} // namespace
 
-  static ol_impl_result_t fromError(llvm::Error &&Error) {
-    ol_errc_t ErrCode;
-    llvm::StringRef Details;
-    llvm::handleAllErrors(std::move(Error), [&](llvm::StringError &Err) {
-      ErrCode = GetErrorCode(Err.convertToErrorCode());
-      Details = errorStrs().insert(Err.getMessage()).first->getKeyData();
-    });
-
-    return ol_impl_result_t{ErrCode, Details};
+inline ol_result_t llvmErrorToOffloadError(llvm::Error &&Err) {
+  if (!Err) {
+    // No error
+    return nullptr;
   }
 
-  operator ol_result_t() { return Result; }
+  ol_errc_t ErrCode;
+  llvm::StringRef Details;
 
-private:
-  static ol_errc_t GetErrorCode(std::error_code Code) {
-    if (Code.category() ==
-        error::make_error_code(error::ErrorCode::SUCCESS).category()) {
-      return static_cast<ol_errc_t>(Code.value());
-    }
-    return OL_ERRC_UNKNOWN;
-  }
+  llvm::handleAllErrors(std::move(Err), [&](llvm::StringError &Err) {
+    ErrCode = GetErrorCode(Err.convertToErrorCode());
+    Details = errorStrs().insert(Err.getMessage()).first->getKeyData();
+  });
 
-  ol_result_t Result;
-};
+  auto NewErr = std::unique_ptr<ol_error_struct_t>(
+      new ol_error_struct_t{ErrCode, Details.data()});
+  return errors().emplace(std::move(NewErr)).first->get();
+}
diff --git a/offload/liboffload/include/generated/OffloadEntryPoints.inc b/offload/liboffload/include/generated/OffloadEntryPoints.inc
index d70ebed934dce..9feebeea09ec3 100644
--- a/offload/liboffload/include/generated/OffloadEntryPoints.inc
+++ b/offload/liboffload/include/generated/OffloadEntryPoints.inc
@@ -7,7 +7,7 @@
 //===----------------------------------------------------------------------===//
 
 ///////////////////////////////////////////////////////////////////////////////
-ol_impl_result_t olInit_val() {
+llvm::Error olInit_val() {
   if (offloadConfig().ValidationEnabled) {
   }
 
@@ -18,7 +18,7 @@ OL_APIEXPORT ol_result_t OL_APICALL olInit() {
     llvm::errs() << "---> olInit";
   }
 
-  ol_result_t Result = olInit_val();
+  ol_result_t Result = llvmErrorToOffloadError(olInit_val());
 
   if (offloadConfig().TracingEnabled) {
     llvm::errs() << "()";
@@ -38,7 +38,7 @@ ol_result_t olInitWithCodeLoc(ol_code_location_t *CodeLocation) {
 }
 
 ///////////////////////////////////////////////////////////////////////////////
-ol_impl_result_t olShutDown_val() {
+llvm::Error olShutDown_val() {
   if (offloadConfig().ValidationEnabled) {
   }
 
@@ -49,7 +49,7 @@ OL_APIEXPORT ol_result_t OL_APICALL olShutDown() {
     llvm::errs() << "---> olShutDown";
   }
 
-  ol_result_t Result = olShutDown_val();
+  ol_result_t Result = llvmErrorToOffloadError(olShutDown_val());
 
   if (offloadConfig().TracingEnabled) {
     llvm::errs() << "()";
@@ -69,20 +69,23 @@ ol_result_t olShutDownWithCodeLoc(ol_code_location_t *CodeLocation) {
 }
 
 ///////////////////////////////////////////////////////////////////////////////
-ol_impl_result_t olGetPlatformInfo_val(ol_platform_handle_t Platform,
-                                       ol_platform_info_t PropName,
-                                       size_t PropSize, void *PropValue) {
+llvm::Error olGetPlatformInfo_val(ol_platform_handle_t Platform,
+                                  ol_platform_info_t PropName, size_t PropSize,
+                                  void *PropValue) {
   if (offloadConfig().ValidationEnabled) {
     if (PropSize == 0) {
-      return OL_ERRC_INVALID_SIZE;
+      return createOffloadError(error::ErrorCode::INVALID_SIZE,
+                                "validation failure: PropSize == 0");
     }
 
     if (NULL == Platform) {
-      return OL_ERRC_INVALID_NULL_HANDLE;
+      return createOffloadError(error::ErrorCode::INVALID_NULL_HANDLE,
+                                "validation failure: NULL == Platform");
     }
 
     if (NULL == PropValue) {
-      return OL_ERRC_INVALID_NULL_POINTER;
+      return createOffloadError(error::ErrorCode::INVALID_NULL_POINTER,
+                                "validation failure: NULL == PropValue");
     }
   }
 
@@ -96,8 +99,8 @@ olGetPlatformInfo(ol_platform_handle_t Platform, ol_platform_info_t PropName,
     llvm::errs() << "---> olGetPlatformInfo";
   }
 
-  ol_result_t Result =
-      olGetPlatformInfo_val(Platform, PropName, PropSize, PropValue);
+  ol_result_t Result = llvmErrorToOffloadError(
+      olGetPlatformInfo_val(Platform, PropName, PropSize, PropValue));
 
   if (offloadConfig().TracingEnabled) {
     ol_get_platform_info_params_t Params = {&Platform, &PropName, &PropSize,
@@ -123,16 +126,18 @@ ol_result_t olGetPlatformInfoWithCodeLoc(ol_platform_handle_t Platform,
 }
 
 ///////////////////////////////////////////////////////////////////////////////
-ol_impl_result_t olGetPlatformInfoSize_val(ol_platform_handle_t Platform,
-                                           ol_platform_info_t PropName,
-                                           size_t *PropSizeRet) {
+llvm::Error olGetPlatformInfoSize_val(ol_platform_handle_t Platform,
+                                      ol_platform_info_t PropName,
+                                      size_t *PropSizeRet) {
   if (offloadConfig().ValidationEnabled) {
     if (NULL == Platform) {
-      return OL_ERRC_INVALID_NULL_HANDLE;
+      return createOffloadError(error::ErrorCode::INVALID_NULL_HANDLE,
+                                "validation failure: NULL == Platform");
     }
 
     if (NULL == PropSizeRet) {
-      return OL_ERRC_INVALID_NULL_POINTER;
+      return createOffloadError(error::ErrorCode::INVALID_NULL_POINTER,
+                                "validation failure: NULL == PropSizeRet");
     }
   }
 
@@ -146,8 +151,8 @@ olGetPlatformInfoSize(ol_platform_handle_t Platform,
     llvm::errs() << "---> olGetPlatformInfoSize";
   }
 
-  ol_result_t Result =
-      olGetPlatformInfoSize_val(Platform, PropName, PropSizeRet);
+  ol_result_t Result = llvmErrorToOffloadError(
+      olGetPlatformInfoSize_val(Platform, PropName, PropSizeRet));
 
   if (offloadConfig().TracingEnabled) {
     ol_get_platform_info_size_params_t Params = {&Platform, &PropName,
@@ -172,8 +177,8 @@ ol_result_t olGetPlatformInfoSizeWithCodeLoc(ol_platform_handle_t Platform,
 }
 
 ///////////////////////////////////////////////////////////////////////////////
-ol_impl_result_t olIterateDevices_val(ol_device_iterate_cb_t Callback,
-                                      void *UserData) {
+llvm::Error olIterateDevices_val(ol_device_iterate_cb_t Callback,
+                                 void *UserData) {
   if (offloadConfig().ValidationEnabled) {
   }
 
@@ -185,7 +190,8 @@ olIterateDevices(ol_device_iterate_cb_t Callback, void *UserData) {
     llvm::errs() << "---> olIterateDevices";
   }
 
-  ol_result_t Result = olIterateDevices_val(Callback, UserData);
+  ol_result_t Result =
+      llvmErrorToOffloadError(olIterateDevices_val(Callback, UserData));
 
   if (offloadConfig().TracingEnabled) {
     ol_iterate_devices_params_t Params = {&Callback, &UserData};
@@ -208,20 +214,23 @@ ol_result_t olIterateDevicesWithCodeLoc(ol_device_iterate_cb_t Callback,
 }
 
 ///////////////////////////////////////////////////////////////////////////////
-ol_impl_result_t olGetDeviceInfo_val(ol_device_handle_t Device,
-                                     ol_device_info_t PropName, size_t PropSize,
-                                     void *PropValue) {
+llvm::Error olGetDeviceInfo_val(ol_device_handle_t Device,
+                                ol_device_info_t PropName, size_t PropSize,
+                                void *PropValue) {
   if (offloadConfig().ValidationEnabled) {
     if (PropSize == 0) {
-      return OL_ERRC_INVALID_SIZE;
+      return createOffloadError(error::ErrorCode::INVALID_SIZE,
+                                "validation failure: PropSize == 0");
     }
 
     if (NULL == Device) {
-      return OL_ERRC_INVALID_NULL_HANDLE;
+      return createOffloadError(error::ErrorCode::INVALID_NULL_HANDLE,
+                                "validation failure: NULL == Device");
     }
 
     if (NULL == PropValue) {
-      return OL_ERRC_INVALID_NULL_POINTER;
+      return createOffloadError(error::ErrorCode::INVALID_NULL_POINTER,
+                                "validation failure: NULL == PropValue");
     }
   }
 
@@ -236,8 +245,8 @@ OL_APIEXPORT ol_result_t OL_APICALL olGetDeviceInfo(ol_device_handle_t Device,
     llvm::errs() << "---> olGetDeviceInfo";
   }
 
-  ol_result_t Result =
-      olGetDeviceInfo_val(Device, PropName, PropSize, PropValue);
+  ol_result_t Result = llvmErrorToOffloadError(
+      olGetDeviceInfo_val(Device, PropName, PropSize, PropValue));
 
   if (offloadConfig().TracingEnabled) {
     ol_get_device_info_params_t Params = {&Device, &PropName, &PropSize,
@@ -262,16 +271,18 @@ ol_result_t olGetDeviceInfoWithCodeLoc(ol_device_handle_t Device,
 }
 
 ///////////////////////////////////////////////////////////////////////////////
-ol_impl_result_t olGetDeviceInfoSize_val(ol_device_handle_t Device,
-                                         ol_device_info_t PropName,
-                                         size_t *PropSizeRet) {
+llvm::Error olGetDeviceInfoSize_val(ol_device_handle_t Device,
+                                    ol_device_info_t PropName,
+                                    size_t *PropSizeRet) {
   if (offloadConfig().ValidationEnabled) {
     if (NULL == Device) {
-      return OL_ERRC_INVALID_NULL_HANDLE;
+      return createOffloadError(error::ErrorCode::INVALID_NULL_HANDLE,
+                                "validation failure: NULL == Device");
     }
 
     if (NULL == PropSizeRet) {
-      return OL_ERRC_INVALID_NULL_POINTER;
+      return createOffloadError(error::ErrorCode::INVALID_NULL_POINTER,
+                                "validation failure: NULL == PropSizeRet");
     }
   }
 
@@ -283,7 +294,8 @@ OL_APIEXPORT ol_result_t OL_APICALL olGetDeviceInfoSize(
     llvm::errs() << "---> olGetDeviceInfoSize";
   }
 
-  ol_result_t Result = olGetDeviceInfoSize_val(Device, PropName, PropSizeRet);
+  ol_result_t Result = llvmErrorToOffloadError(
+      olGetDeviceInfoSize_val(Device, PropName, PropSizeRet));
 
   if (offloadConfig().TracingEnabled) {
     ol_get_device_info_size_params_t Params = {&Device, &PropName,
@@ -308,19 +320,22 @@ ol_result_t olGetDeviceInfoSizeWithCodeLoc(ol_device_handle_t Device,
 }
 
 ///////////////////////////////////////////////////////////////////////////////
-ol_impl_result_t olMemAlloc_val(ol_device_handle_t Device, ol_alloc_type_t Type,
-                                size_t Size, void **AllocationOut) {
+llvm::Error olMemAlloc_val(ol_device_handle_t Device, ol_alloc_type_t Type,
+                           size_t Size, void **AllocationOut) {
   if (offloadConfig().ValidationEnabled) {
     if (Size == 0) {
-      return OL_ERRC_INVALID_SIZE;
+      return createOffloadError(error::ErrorCode::INVALID_SIZE,
+                                "validation failure: Size == 0");
     }
 
     if (NULL == Device) {
-      return OL_ERRC_INVALID_NULL_HANDLE;
+      return createOffloadError(error::ErrorCode::INVALID_NULL_HANDLE,
+                                "validation failure: NULL == Device");
     }
 
     if (NULL == AllocationOut) {
-      return OL_ERRC_INVALID_NULL_POINTER;
+      return createOffloadError(error::ErrorCode::INVALID_NULL_POINTER,
+                                "validation failure: NULL == AllocationOut");
     }
   }
 
@@ -334,7 +349,8 @@ OL_APIEXPORT ol_result_t OL_APICALL olMemAlloc(ol_device_handle_t Device,
     llvm::errs() << "---> olMemAlloc";
   }
 
-  ol_result_t Result = olMemAlloc_val(Device, Type, Size, AllocationOut);
+  ol_result_t Result = llvmErrorToOffloadError(
+      olMemAlloc_val(Device, Type, Size, AllocationOut));
 
   if (offloadConfig().TracingEnabled) {
     ol_mem_alloc_params_t Params = {&Device, &Type, &Size, &AllocationOut};
@@ -358,10 +374,11 @@ ol_result_t olMemAllocWithCodeLoc(ol_device_handle_t Device,
 }
 
 ///////////////////////////////////////////////////////////////////////////////
-ol_impl_result_t olMemFree_val(void *Address) {
+llvm::Error olMemFree_val(void *Address) {
   if (offloadConfig().ValidationEnabled) {
     if (NULL == Address) {
-      return OL_ERRC_INVALID_NULL_POINTER;
+      return createOffloadError(error::ErrorCode::INVALID_NULL_POINTER,
+                                "validation failure: NULL == Address");
     }
   }
 
@@ -372,7 +389,7 @@ OL_APIEXPORT ol_result_t OL_APICALL olMemFree(void *Address) {
     llvm::errs() << "---> olMemFree";
   }
 
-  ol_result_t Result = olMemFree_val(Address);
+  ol_result_t Result = llvmErrorToOffloadError(olMemFree_val(Address));
 
   if (offloadConfig().TracingEnabled) {
     ol_mem_free_params_t Params = {&Address};
@@ -394,29 +411,35 @@ ol_result_t olMemFreeWithCodeLoc(void *Address,
 }
 
 ///////////////////////////////////////////////////////////////////////////////
-ol_impl_result_t olMemcpy_val(ol_queue_handle_t Queue, void *DstPtr,
-                              ol_device_handle_t DstDevice, void *SrcPtr,
-                              ol_device_handle_t SrcDevice, size_t Size,
-                              ol_event_handle_t *EventOut) {
+llvm::Error olMemcpy_val(ol_queue_handle_t Queue, void *DstPtr,
+                         ol_device_handle_t DstDevice, void *SrcPtr,
+                         ol_device_handle_t SrcDevice, size_t Size,
+                         ol_event_handle_t *EventOut) {
   if (offloadConfig().ValidationEnabled) {
     if (Queue == NULL && EventOut != NULL) {
-      return OL_ERRC_INVALID_ARGUMENT;
+      return createOffloadError(
+          error::ErrorCode::INVALID_ARGUMENT,
+          "validation failure: Queue == NULL && EventOut != NULL");
     }
 
     if (NULL == DstDevice) {
-      return OL_ERRC_INVALID_NULL_HANDLE;
+      return createOffloadError(error::ErrorCode::INVALID_NULL_HANDLE,
+                                "validation failure: NULL == DstDevice");
     }
 
     if (NULL == SrcDevice) {
-      return OL_ERRC_INVALID_NULL_HANDLE;
+      return createOffloadError(error::ErrorCode::INVALID_NULL_HANDLE,
+                                "validation failure: NULL == SrcDevice");
     }
 
     if (NULL == DstPtr) {
-      return OL_ERRC_INVALID_NULL_POINTER;
+      return createOffloadError(error::ErrorCode::INVALID_NULL_POINTER,
+                                "validation failure: NULL == DstPtr");
     }
 
     if (NULL == SrcPtr) {
-      return OL_ERRC_INVALID_NULL_POINTER;
+      return createOffloadError(error::ErrorCode::INVALID_NULL_POINTER,
+                                "validation failure: NULL == SrcPtr");
     }
   }
 
@@ -431,8 +454,8 @@ olMemcpy(ol_queue_handle_t Queue, void *DstPtr, ol_device_handle_t DstDevice,
     llvm::errs() << "---> olMemcpy";
   }
 
-  ol_result_t Result =
-      olMemcpy_val(Queue, DstPtr, DstDevice, SrcPtr, SrcDevice, Size, EventOut);
+  ol_result_t Result = llvmErrorToOffloadError(olMemcpy_val(
+      Queue, DstPtr, DstDevice, SrcPtr, SrcDevice, Size, EventOut));
 
   if (offloadConfig().TracingEnabled) {
     ol_memcpy_params_t Params = {&Queue,     &DstPtr, &DstDevice, &SrcPtr,
@@ -459,15 +482,17 @@ ol_result_t olMemcpyWithCodeLoc(ol_queue_handle_t Queue, void *DstPtr,
 }
 
 ///////////////////////////////////////////////////////////////////////////////
-ol_impl_result_t olCreateQueue_val(ol_device_handle_t Device,
-                                   ol_queue_handle_t *Queue) {
+llvm::Error olCreateQueue_val(ol_device_handle_t Device,
+                              ol_queue_handle_t *Queue) {
   if (offloadConfig().ValidationEnabled) {
     if (NULL == Device) {
-      return OL_ERRC_INVALID_NULL_HANDLE;
+      return createOffloadError(error::ErrorCode::INVALID_NULL_HANDLE,
+                                "validation failure: NULL == Device");
     }
 
     if (NULL == Queue) {
-      return OL_ERRC_INVALID_NULL_POINTER;
+      return createOffloadError(error::ErrorCode::INVALID_NULL_POINTER,
+                                "validation failure: NULL == Queue");
     }
   }
 
@@ -479,7 +504,8 @@ OL_APIEXPORT ol_result_t OL_APICALL olCreateQueue(ol_device_handle_t Device,
     llvm::errs() << "---> olCreateQueue";
   }
 
-  ol_result_t Result = olCreateQueue_val(Device, Queue);
+  ol_result_t Result =
+      llvmErrorToOffloadError(olCreateQueue_val(Device, Queue));
 
   if (offloadConfig().TracingEnabled) {
     ol_create_queue_params_t Params = {&Device, &Queue};
@@ -502,10 +528,11 @@ ol_result_t olCreateQueueWithCodeLoc(ol_device_handle_t Device,
 }
 
 ///////////////////////////////////////////////////////////////////////////////
-ol_impl_result_t olDestroyQueue_val(ol_queue_handle_t Queue) {
+llvm::Error olDestroyQueue_val(ol_queue_handle_t Queue) {
   if (offloadConfig().ValidationEnabled) {
     if (NULL == Queue) {
-      return OL_ERRC_INVALID_NULL_HANDLE;
+      return createOffloadError(error::ErrorCode::INVALID_NULL_HANDLE,
+                                "validation failure: NULL == Queue");
     }
   }
 
@@ -516,7 +543,7 @@ OL_APIEXPORT ol_result_t OL_APICALL olDestroyQueue(ol_queue_handle_t Queue) {
     llvm::errs() << "---> olDestroyQueue";
   }
 
-  ol_result_t Result = olDestroyQueue_val(Queue);
+  ol_result_t Result = llvmErrorToOffloadError(olDestroyQueue_val(Queue));
 
   if (offloadConfig().TracingEnabled) {
     ol_destroy_queue_params_t Params = {&Queue};
@@ -538,10 +565,11 @@ ol_result_t olDestroyQueueWithCodeLoc(ol_queue_handle_t Queue,
 }
 
 ///////////////////////////////////////////////////////////////////////////////
-ol_impl_result_t olWaitQueue_val(ol_queue_handle_t Queue) {
+llvm::Error olWaitQueue_val(ol_queue_handle_t Queue) {
   if (offloadConfig().ValidationEnabled) {
     if (NULL == Queue) {
-      return OL_ERRC_INVALID_NULL_HANDLE;
+      return createOffloadError(error::ErrorCode::INVALID_NULL_HANDLE,
+                                "validation failure: NULL == Queue");
     }
   }
 
@@ -552,7 +580,7 @@ OL_APIEXPORT ol_result_t OL_APICALL olWaitQueue(ol_queue_handle_t Queue) {
     llvm::errs() << "---> olWaitQueue";
   }
 
-  ol_result_t Result = olWaitQueue_val(Queue);
+  ol_result_t Result = llvmErrorToOffloadError(olWaitQueue_val(Queue));
 
   if (offloadConfig().TracingEnabled) {
     ol_wait_queue_params_t Params = {&Queue};
@@ -574,10 +602,11 @@ ol_result_t olWaitQueueWithCodeLoc(ol_queue_handle_t Queue,
 }
 
 ///////////////////////////////////////////////////////////////////////////////
-ol_impl_result_t olDestroyEvent_val(ol_event_handle_t Event) {
+llvm::Error olDestroyEvent_val(ol_event_handle_t Event) {
   if (offloadConfig().ValidationEnabled) {
     if (NULL == Event) {
-      return OL_ERRC_INVALID_NULL_HANDLE;
+      return createOffloadError(error::ErrorCode::INVALID_NULL_HANDLE,
+                                "validation failure: NULL == Event");
     }
   }
 
@@ -588,7 +617,7 @@ OL_APIEXPORT ol_result_t OL_APICALL olDestroyEvent(ol_event_handle_t Event) {
     llvm::errs() << "---> olDestroyEvent";
   }
 
-  ol_result_t Result = olDestroyEvent_val(Event);
+  ol_result_t Result = llvmErrorToOffloadError(olDestroyEvent_val(Event));
 
   if (offloadConfig().TracingEnabled) {
     ol_destroy_event_params_t Params = {&Event};
@@ -610,10 +639,11 @@ ol_result_t olDestroyEventWithCodeLoc(ol_event_handle_t Event,
 }
 
 ///////////////////////////////////////////////////////////////////////////////
-ol_impl_result_t olWaitEvent_val(ol_event_handle_t Event) {
+llvm::Error olWaitEvent_val(ol_event_handle_t Event) {
   if (offloadConfig().ValidationEnabled) {
     if (NULL == Event) {
-      return OL_ERRC_INVALID_NULL_HANDLE;
+      return createOffloadError(error::ErrorCode::INVALID_NULL_HANDLE,
+                                "validation failure: NULL == Event");
     }
   }
 
@@ -624,7 +654,7 @@ OL_APIEXPORT ol_result_t OL_APICALL olWaitEvent(ol_event_handle_t Event) {
     llvm::errs() << "---> olWaitEvent";
   }
 
-  ol_result_t Result = olWaitEvent_val(Event);
+  ol_result_t Result = llvmErrorToOffloadError(olWaitEvent_val(Event));
 
   if (offloadConfig().TracingEnabled) {
     ol_wait_event_params_t Params = {&Event};
@@ -646,20 +676,23 @@ ol_result_t olWaitEventWithCodeLoc(ol_event_handle_t Event,
 }
 
 ///////////////////////////////////////////////////////////////////////////////
-ol_impl_result_t olCreateProgram_val(ol_device_handle_t Device,
-                                     const void *ProgData, size_t ProgDataSize,
-                                     ol_program_handle_t *Program) {
+llvm::Error olCreateProgram_val(ol_device_handle_t Device, const void *ProgData,
+                                size_t ProgDataSize,
+                                ol_program_handle_t *Program) {
   if (offloadConfig().ValidationEnabled) {
     if (NULL == Device) {
-      return OL_ERRC_INVALID_NULL_HANDLE;
+      return createOffloadError(error::ErrorCode::INVALID_NULL_HANDLE,
+                                "validation failure: NULL == Device");
     }
 
     if (NULL == ProgData) {
-      return OL_ERRC_INVALID_NULL_POINTER;
+      return createOffloadError(error::ErrorCode::INVALID_NULL_POINTER,
+                                "validation failure: NULL == ProgData");
     }
 
     if (NULL == Program) {
-      return OL_ERRC_INVALID_NULL_POINTER;
+      return createOffloadError(error::ErrorCode::INVALID_NULL_POINTER,
+                                "validation failure: NULL == Program");
     }
   }
 
@@ -673,8 +706,8 @@ olCreateProgram(ol_device_handle_t Device, const void *ProgData,
     llvm::errs() << "---> olCreateProgram";
   }
 
-  ol_result_t Result =
-      olCreateProgram_val(Device, ProgData, ProgDataSize, Program);
+  ol_result_t Result = llvmErrorToOffloadError(
+      olCreateProgram_val(Device, ProgData, ProgDataSize, Program));
 
   if (offloadConfig().TracingEnabled) {
     ol_create_program_params_t Params = {&Device, &ProgData, &ProgDataSize,
@@ -701,10 +734,11 @@ ol_result_t olCreateProgramWithCodeLoc(ol_device_handle_t Device,
 }
 
 ///////////////////////////////////////////////////////////////////////////////
-ol_impl_result_t olDestroyProgram_val(ol_program_handle_t Program) {
+llvm::Error olDestroyProgram_val(ol_program_handle_t Program) {
   if (offloadConfig().ValidationEnabled) {
     if (NULL == Program) {
-      return OL_ERRC_INVALID_NULL_HANDLE;
+      return createOffloadError(error::ErrorCode::INVALID_NULL_HANDLE,
+                                "validation failure: NULL == Program");
     }
   }
 
@@ -716,7 +750,7 @@ olDestroyProgram(ol_program_handle_t Program) {
     llvm::errs() << "---> olDestroyProgram";
   }
 
-  ol_result_t Result = olDestroyProgram_val(Program);
+  ol_result_t Result = llvmErrorToOffloadError(olDestroyProgram_val(Program));
 
   if (offloadConfig().TracingEnabled) {
     ol_destroy_program_params_t Params = {&Program};
@@ -738,20 +772,22 @@ ol_result_t olDestroyProgramWithCodeLoc(ol_program_handle_t Program,
 }
 
 ///////////////////////////////////////////////////////////////////////////////
-ol_impl_result_t olGetKernel_val(ol_program_handle_t Program,
-                                 const char *KernelName,
-                                 ol_kernel_handle_t *Kernel) {
+llvm::Error olGetKernel_val(ol_program_handle_t Program, const char *KernelName,
+                            ol_kernel_handle_t *Kernel) {
   if (offloadConfig().ValidationEnabled) {
     if (NULL == Program) {
-      return OL_ERRC_INVALID_NULL_HANDLE;
+      return createOffloadError(error::ErrorCode::INVALID_NULL_HANDLE,
+                                "validation failure: NULL == Program");
     }
 
     if (NULL == KernelName) {
-      return OL_ERRC_INVALID_NULL_POINTER;
+      return createOffloadError(error::ErrorCode::INVALID_NULL_POINTER,
+                                "validation failure: NULL == KernelName");
     }
 
     if (NULL == Kernel) {
-      return OL_ERRC_INVALID_NULL_POINTER;
+      return createOffloadError(error::ErrorCode::INVALID_NULL_POINTER,
+                                "validation failure: NULL == Kernel");
     }
   }
 
@@ -764,7 +800,8 @@ OL_APIEXPORT ol_result_t OL_APICALL olGetKernel(ol_program_handle_t Program,
     llvm::errs() << "---> olGetKernel";
   }
 
-  ol_result_t Result = olGetKernel_val(Program, KernelName, Kernel);
+  ol_result_t Result =
+      llvmErrorToOffloadError(olGetKernel_val(Program, KernelName, Kernel));
 
   if (offloadConfig().TracingEnabled) {
     ol_get_kernel_params_t Params = {&Program, &KernelName, &Kernel};
@@ -788,7 +825,7 @@ ol_result_t olGetKernelWithCodeLoc(ol_program_handle_t Program,
 }
 
 ///////////////////////////////////////////////////////////////////////////////
-ol_impl_result_t
+llvm::Error
 olLaunchKernel_val(ol_queue_handle_t Queue, ol_device_handle_t Device,
                    ol_kernel_handle_t Kernel, const void *ArgumentsData,
                    size_t ArgumentsSize,
@@ -796,23 +833,29 @@ olLaunchKernel_val(ol_queue_handle_t Queue, ol_device_handle_t Device,
                    ol_event_handle_t *EventOut) {
   if (offloadConfig().ValidationEnabled) {
     if (Queue == NULL && EventOut != NULL) {
-      return OL_ERRC_INVALID_ARGUMENT;
+      return createOffloadError(
+          error::ErrorCode::INVALID_ARGUMENT,
+          "validation failure: Queue == NULL && EventOut != NULL");
     }
 
     if (NULL == Device) {
-      return OL_ERRC_INVALID_NULL_HANDLE;
+      return createOffloadError(error::ErrorCode::INVALID_NULL_HANDLE,
+                                "validation failure: NULL == Device");
     }
 
     if (NULL == Kernel) {
-      return OL_ERRC_INVALID_NULL_HANDLE;
+      return createOffloadError(error::ErrorCode::INVALID_NULL_HANDLE,
+                                "validation failure: NULL == Kernel");
     }
 
     if (NULL == ArgumentsData) {
-      return OL_ERRC_INVALID_NULL_POINTER;
+      return createOffloadError(error::ErrorCode::INVALID_NULL_POINTER,
+                                "validation failure: NULL == ArgumentsData");
     }
 
     if (NULL == LaunchSizeArgs) {
-      return OL_ERRC_INVALID_NULL_POINTER;
+      return createOffloadError(error::ErrorCode::INVALID_NULL_POINTER,
+                                "validation failure: NULL == LaunchSizeArgs");
     }
   }
 
@@ -829,9 +872,9 @@ OL_APIEXPORT ol_result_t OL_APICALL olLaunchKernel(
     llvm::errs() << "---> olLaunchKernel";
   }
 
-  ol_result_t Result =
+  ol_result_t Result = llvmErrorToOffloadError(
       olLaunchKernel_val(Queue, Device, Kernel, ArgumentsData, ArgumentsSize,
-                         LaunchSizeArgs, EventOut);
+                         LaunchSizeArgs, EventOut));
 
   if (offloadConfig().TracingEnabled) {
     ol_launch_kernel_params_t Params = {
diff --git a/offload/liboffload/include/generated/OffloadImplFuncDecls.inc b/offload/liboffload/include/generated/OffloadImplFuncDecls.inc
index ced659c2a4bd6..1ab4ec85143ae 100644
--- a/offload/liboffload/include/generated/OffloadImplFuncDecls.inc
+++ b/offload/liboffload/include/generated/OffloadImplFuncDecls.inc
@@ -5,62 +5,61 @@
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
-ol_impl_result_t olInit_impl();
+llvm::Error olInit_impl();
 
-ol_impl_result_t olShutDown_impl();
+llvm::Error olShutDown_impl();
 
-ol_impl_result_t olGetPlatformInfo_impl(ol_platform_handle_t Platform,
-                                        ol_platform_info_t PropName,
-                                        size_t PropSize, void *PropValue);
+llvm::Error olGetPlatformInfo_impl(ol_platform_handle_t Platform,
+                                   ol_platform_info_t PropName, size_t PropSize,
+                                   void *PropValue);
 
-ol_impl_result_t olGetPlatformInfoSize_impl(ol_platform_handle_t Platform,
-                                            ol_platform_info_t PropName,
-                                            size_t *PropSizeRet);
+llvm::Error olGetPlatformInfoSize_impl(ol_platform_handle_t Platform,
+                                       ol_platform_info_t PropName,
+                                       size_t *PropSizeRet);
 
-ol_impl_result_t olIterateDevices_impl(ol_device_iterate_cb_t Callback,
-                                       void *UserData);
+llvm::Error olIterateDevices_impl(ol_device_iterate_cb_t Callback,
+                                  void *UserData);
 
-ol_impl_result_t olGetDeviceInfo_impl(ol_device_handle_t Device,
-                                      ol_device_info_t PropName,
-                                      size_t PropSize, void *PropValue);
+llvm::Error olGetDeviceInfo_impl(ol_device_handle_t Device,
+                                 ol_device_info_t PropName, size_t PropSize,
+                                 void *PropValue);
 
-ol_impl_result_t olGetDeviceInfoSize_impl(ol_device_handle_t Device,
-                                          ol_device_info_t PropName,
-                                          size_t *PropSizeRet);
+llvm::Error olGetDeviceInfoSize_impl(ol_device_handle_t Device,
+                                     ol_device_info_t PropName,
+                                     size_t *PropSizeRet);
 
-ol_impl_result_t olMemAlloc_impl(ol_device_handle_t Device,
-                                 ol_alloc_type_t Type, size_t Size,
-                                 void **AllocationOut);
+llvm::Error olMemAlloc_impl(ol_device_handle_t Device, ol_alloc_type_t Type,
+                            size_t Size, void **AllocationOut);
 
-ol_impl_result_t olMemFree_impl(void *Address);
+llvm::Error olMemFree_impl(void *Address);
 
-ol_impl_result_t olMemcpy_impl(ol_queue_handle_t Queue, void *DstPtr,
-                               ol_device_handle_t DstDevice, void *SrcPtr,
-                               ol_device_handle_t SrcDevice, size_t Size,
-                               ol_event_handle_t *EventOut);
+llvm::Error olMemcpy_impl(ol_queue_handle_t Queue, void *DstPtr,
+                          ol_device_handle_t DstDevice, void *SrcPtr,
+                          ol_device_handle_t SrcDevice, size_t Size,
+                          ol_event_handle_t *EventOut);
 
-ol_impl_result_t olCreateQueue_impl(ol_device_handle_t Device,
-                                    ol_queue_handle_t *Queue);
+llvm::Error olCreateQueue_impl(ol_device_handle_t Device,
+                               ol_queue_handle_t *Queue);
 
-ol_impl_result_t olDestroyQueue_impl(ol_queue_handle_t Queue);
+llvm::Error olDestroyQueue_impl(ol_queue_handle_t Queue);
 
-ol_impl_result_t olWaitQueue_impl(ol_queue_handle_t Queue);
+llvm::Error olWaitQueue_impl(ol_queue_handle_t Queue);
 
-ol_impl_result_t olDestroyEvent_impl(ol_event_handle_t Event);
+llvm::Error olDestroyEvent_impl(ol_event_handle_t Event);
 
-ol_impl_result_t olWaitEvent_impl(ol_event_handle_t Event);
+llvm::Error olWaitEvent_impl(ol_event_handle_t Event);
 
-ol_impl_result_t olCreateProgram_impl(ol_device_handle_t Device,
-                                      const void *ProgData, size_t ProgDataSize,
-                                      ol_program_handle_t *Program);
+llvm::Error olCreateProgram_impl(ol_device_handle_t Device,
+                                 const void *ProgData, size_t ProgDataSize,
+                                 ol_program_handle_t *Program);
 
-ol_impl_result_t olDestroyProgram_impl(ol_program_handle_t Program);
+llvm::Error olDestroyProgram_impl(ol_program_handle_t Program);
 
-ol_impl_result_t olGetKernel_impl(ol_program_handle_t Program,
-                                  const char *KernelName,
-                                  ol_kernel_handle_t *Kernel);
+llvm::Error olGetKernel_impl(ol_program_handle_t Program,
+                             const char *KernelName,
+                             ol_kernel_handle_t *Kernel);
 
-ol_impl_result_t
+llvm::Error
 olLaunchKernel_impl(ol_queue_handle_t Queue, ol_device_handle_t Device,
                     ol_kernel_handle_t Kernel, const void *ArgumentsData,
                     size_t ArgumentsSize,
diff --git a/offload/liboffload/src/Helpers.hpp b/offload/liboffload/src/Helpers.hpp
index d003d30252462..14ed512ea3733 100644
--- a/offload/liboffload/src/Helpers.hpp
+++ b/offload/liboffload/src/Helpers.hpp
@@ -13,20 +13,24 @@
 //===----------------------------------------------------------------------===//
 
 #include "OffloadAPI.h"
+#include "Shared/OffloadError.h"
+#include "llvm/Support/Error.h"
 
 #include <cstring>
 
 template <typename T, typename Assign>
-ol_errc_t getInfoImpl(size_t ParamValueSize, void *ParamValue,
-                      size_t *ParamValueSizeRet, T Value, size_t ValueSize,
-                      Assign &&AssignFunc) {
+llvm::Error getInfoImpl(size_t ParamValueSize, void *ParamValue,
+                        size_t *ParamValueSizeRet, T Value, size_t ValueSize,
+                        Assign &&AssignFunc) {
   if (!ParamValue && !ParamValueSizeRet) {
-    return OL_ERRC_INVALID_NULL_POINTER;
+    return error::createOffloadError(error::ErrorCode::INVALID_NULL_POINTER,
+                                     "value and size outputs are nullptr");
   }
 
   if (ParamValue != nullptr) {
     if (ParamValueSize < ValueSize) {
-      return OL_ERRC_INVALID_SIZE;
+      return error::createOffloadError(error::ErrorCode::INVALID_SIZE,
+                                       "provided size is invalid");
     }
     AssignFunc(ParamValue, Value, ValueSize);
   }
@@ -35,12 +39,12 @@ ol_errc_t getInfoImpl(size_t ParamValueSize, void *ParamValue,
     *ParamValueSizeRet = ValueSize;
   }
 
-  return OL_ERRC_SUCCESS;
+  return llvm::Error::success();
 }
 
 template <typename T>
-ol_errc_t getInfo(size_t ParamValueSize, void *ParamValue,
-                  size_t *ParamValueSizeRet, T Value) {
+llvm::Error getInfo(size_t ParamValueSize, void *ParamValue,
+                    size_t *ParamValueSizeRet, T Value) {
   auto Assignment = [](void *ParamValue, T Value, size_t) {
     *static_cast<T *>(ParamValue) = Value;
   };
@@ -50,7 +54,7 @@ ol_errc_t getInfo(size_t ParamValueSize, void *ParamValue,
 }
 
 template <typename T>
-ol_errc_t getInfoArray(size_t array_length, size_t ParamValueSize,
+llvm::Error getInfoArray(size_t array_length, size_t ParamValueSize,
                        void *ParamValue, size_t *ParamValueSizeRet,
                        const T *Value) {
   return getInfoImpl(ParamValueSize, ParamValue, ParamValueSizeRet, Value,
@@ -58,7 +62,7 @@ ol_errc_t getInfoArray(size_t array_length, size_t ParamValueSize,
 }
 
 template <>
-inline ol_errc_t getInfo<const char *>(size_t ParamValueSize, void *ParamValue,
+inline llvm::Error getInfo<const char *>(size_t ParamValueSize, void *ParamValue,
                                        size_t *ParamValueSizeRet,
                                        const char *Value) {
   return getInfoArray(strlen(Value) + 1, ParamValueSize, ParamValue,
@@ -79,12 +83,12 @@ class ReturnHelper {
         ParamValueSizeRet(ParamValueSize) {}
 
   // Scalar return Value
-  template <class T> ol_errc_t operator()(const T &t) {
+  template <class T> llvm::Error operator()(const T &t) {
     return getInfo(ParamValueSize, ParamValue, ParamValueSizeRet, t);
   }
 
   // Array return Value
-  template <class T> ol_errc_t operator()(const T *t, size_t s) {
+  template <class T> llvm::Error operator()(const T *t, size_t s) {
     return getInfoArray(s, ParamValueSize, ParamValue, ParamValueSizeRet, t);
   }
 
diff --git a/offload/liboffload/src/OffloadImpl.cpp b/offload/liboffload/src/OffloadImpl.cpp
index ea65282e3ba52..c6f64d218cd2a 100644
--- a/offload/liboffload/src/OffloadImpl.cpp
+++ b/offload/liboffload/src/OffloadImpl.cpp
@@ -36,6 +36,7 @@ ompt_function_lookup_t lookupCallbackByName = nullptr;
 
 using namespace llvm::omp::target;
 using namespace llvm::omp::target::plugin;
+using namespace error;
 
 // Handle type definitions. Ideally these would be 1:1 with the plugins, but
 // we add some additional data here for now to avoid churn in the plugin
@@ -109,9 +110,9 @@ ol_device_handle_t HostDevice() {
   return &Platforms().back().Devices[0];
 }
 
-template <typename HandleT> ol_impl_result_t olDestroy(HandleT Handle) {
+template <typename HandleT> Error olDestroy(HandleT Handle) {
   delete Handle;
-  return OL_SUCCESS;
+  return Error::success();
 }
 
 constexpr ol_platform_backend_t pluginNameToBackend(StringRef Name) {
@@ -169,18 +170,17 @@ void initPlugins() {
 
 // TODO: We can properly reference count here and manage the resources in a more
 // clever way
-ol_impl_result_t olInit_impl() {
+Error olInit_impl() {
   static std::once_flag InitFlag;
   std::call_once(InitFlag, initPlugins);
 
-  return OL_SUCCESS;
+  return Error::success();
 }
-ol_impl_result_t olShutDown_impl() { return OL_SUCCESS; }
+Error olShutDown_impl() { return Error::success(); }
 
-ol_impl_result_t olGetPlatformInfoImplDetail(ol_platform_handle_t Platform,
-                                             ol_platform_info_t PropName,
-                                             size_t PropSize, void *PropValue,
-                                             size_t *PropSizeRet) {
+Error olGetPlatformInfoImplDetail(ol_platform_handle_t Platform,
+                                  ol_platform_info_t PropName, size_t PropSize,
+                                  void *PropValue, size_t *PropSizeRet) {
   ReturnHelper ReturnValue(PropSize, PropValue, PropSizeRet);
   bool IsHost = Platform->BackendType == OL_PLATFORM_BACKEND_HOST;
 
@@ -200,30 +200,30 @@ ol_impl_result_t olGetPlatformInfoImplDetail(ol_platform_handle_t Platform,
     return ReturnValue(Platform->BackendType);
   }
   default:
-    return OL_ERRC_INVALID_ENUMERATION;
+    return createOffloadError(ErrorCode::INVALID_ENUMERATION,
+                              "getPlatformInfo enum '%i' is invalid", PropName);
   }
 
-  return OL_SUCCESS;
+  return Error::success();
 }
 
-ol_impl_result_t olGetPlatformInfo_impl(ol_platform_handle_t Platform,
-                                        ol_platform_info_t PropName,
-                                        size_t PropSize, void *PropValue) {
+Error olGetPlatformInfo_impl(ol_platform_handle_t Platform,
+                             ol_platform_info_t PropName, size_t PropSize,
+                             void *PropValue) {
   return olGetPlatformInfoImplDetail(Platform, PropName, PropSize, PropValue,
                                      nullptr);
 }
 
-ol_impl_result_t olGetPlatformInfoSize_impl(ol_platform_handle_t Platform,
-                                            ol_platform_info_t PropName,
-                                            size_t *PropSizeRet) {
+Error olGetPlatformInfoSize_impl(ol_platform_handle_t Platform,
+                                 ol_platform_info_t PropName,
+                                 size_t *PropSizeRet) {
   return olGetPlatformInfoImplDetail(Platform, PropName, 0, nullptr,
                                      PropSizeRet);
 }
 
-ol_impl_result_t olGetDeviceInfoImplDetail(ol_device_handle_t Device,
-                                           ol_device_info_t PropName,
-                                           size_t PropSize, void *PropValue,
-                                           size_t *PropSizeRet) {
+Error olGetDeviceInfoImplDetail(ol_device_handle_t Device,
+                                ol_device_info_t PropName, size_t PropSize,
+                                void *PropValue, size_t *PropSizeRet) {
 
   ReturnHelper ReturnValue(PropSize, PropValue, PropSizeRet);
 
@@ -261,27 +261,25 @@ ol_impl_result_t olGetDeviceInfoImplDetail(ol_device_handle_t Device,
     return ReturnValue(
         GetInfo({"CUDA Driver Version", "HSA Runtime Version"}).c_str());
   default:
-    return OL_ERRC_INVALID_ENUMERATION;
+    return createOffloadError(ErrorCode::INVALID_ENUMERATION,
+                              "getDeviceInfo enum '%i' is invalid", PropName);
   }
 
-  return OL_SUCCESS;
+  return Error::success();
 }
 
-ol_impl_result_t olGetDeviceInfo_impl(ol_device_handle_t Device,
-                                      ol_device_info_t PropName,
-                                      size_t PropSize, void *PropValue) {
+Error olGetDeviceInfo_impl(ol_device_handle_t Device, ol_device_info_t PropName,
+                           size_t PropSize, void *PropValue) {
   return olGetDeviceInfoImplDetail(Device, PropName, PropSize, PropValue,
                                    nullptr);
 }
 
-ol_impl_result_t olGetDeviceInfoSize_impl(ol_device_handle_t Device,
-                                          ol_device_info_t PropName,
-                                          size_t *PropSizeRet) {
+Error olGetDeviceInfoSize_impl(ol_device_handle_t Device,
+                               ol_device_info_t PropName, size_t *PropSizeRet) {
   return olGetDeviceInfoImplDetail(Device, PropName, 0, nullptr, PropSizeRet);
 }
 
-ol_impl_result_t olIterateDevices_impl(ol_device_iterate_cb_t Callback,
-                                       void *UserData) {
+Error olIterateDevices_impl(ol_device_iterate_cb_t Callback, void *UserData) {
   for (auto &Platform : Platforms()) {
     for (auto &Device : Platform.Devices) {
       if (!Callback(&Device, UserData)) {
@@ -290,7 +288,7 @@ ol_impl_result_t olIterateDevices_impl(ol_device_iterate_cb_t Callback,
     }
   }
 
-  return OL_SUCCESS;
+  return Error::success();
 }
 
 TargetAllocTy convertOlToPluginAllocTy(ol_alloc_type_t Type) {
@@ -305,98 +303,87 @@ TargetAllocTy convertOlToPluginAllocTy(ol_alloc_type_t Type) {
   }
 }
 
-ol_impl_result_t olMemAlloc_impl(ol_device_handle_t Device,
-                                 ol_alloc_type_t Type, size_t Size,
-                                 void **AllocationOut) {
+Error olMemAlloc_impl(ol_device_handle_t Device, ol_alloc_type_t Type,
+                      size_t Size, void **AllocationOut) {
   auto Alloc =
       Device->Device->dataAlloc(Size, nullptr, convertOlToPluginAllocTy(Type));
   if (!Alloc)
-    return ol_impl_result_t::fromError(Alloc.takeError());
+    return Alloc.takeError();
 
   *AllocationOut = *Alloc;
   allocInfoMap().insert_or_assign(*Alloc, AllocInfo{Device, Type});
-  return OL_SUCCESS;
+  return Error::success();
 }
 
-ol_impl_result_t olMemFree_impl(void *Address) {
+Error olMemFree_impl(void *Address) {
   if (!allocInfoMap().contains(Address))
-    return {OL_ERRC_INVALID_ARGUMENT, "Address is not a known allocation"};
+    return createOffloadError(ErrorCode::INVALID_ARGUMENT,
+                              "address is not a known allocation");
 
   auto AllocInfo = allocInfoMap().at(Address);
   auto Device = AllocInfo.Device;
   auto Type = AllocInfo.Type;
 
-  auto Res =
-      Device->Device->dataDelete(Address, convertOlToPluginAllocTy(Type));
-  if (Res)
-    return ol_impl_result_t::fromError(std::move(Res));
+  if (auto Res =
+          Device->Device->dataDelete(Address, convertOlToPluginAllocTy(Type)))
+    return Res;
 
   allocInfoMap().erase(Address);
 
-  return OL_SUCCESS;
+  return Error::success();
 }
 
-ol_impl_result_t olCreateQueue_impl(ol_device_handle_t Device,
-                                    ol_queue_handle_t *Queue) {
+Error olCreateQueue_impl(ol_device_handle_t Device, ol_queue_handle_t *Queue) {
   auto CreatedQueue = std::make_unique<ol_queue_impl_t>(nullptr, Device);
-  auto Err = Device->Device->initAsyncInfo(&(CreatedQueue->AsyncInfo));
-  if (Err)
-    return ol_impl_result_t::fromError(std::move(Err));
+  if (auto Err = Device->Device->initAsyncInfo(&(CreatedQueue->AsyncInfo)))
+    return Err;
 
   *Queue = CreatedQueue.release();
-  return OL_SUCCESS;
+  return Error::success();
 }
 
-ol_impl_result_t olDestroyQueue_impl(ol_queue_handle_t Queue) {
-  return olDestroy(Queue);
-}
+Error olDestroyQueue_impl(ol_queue_handle_t Queue) { return olDestroy(Queue); }
 
-ol_impl_result_t olWaitQueue_impl(ol_queue_handle_t Queue) {
+Error olWaitQueue_impl(ol_queue_handle_t Queue) {
   // Host plugin doesn't have a queue set so it's not safe to call synchronize
   // on it, but we have nothing to synchronize in that situation anyway.
   if (Queue->AsyncInfo->Queue) {
-    auto Err = Queue->Device->Device->synchronize(Queue->AsyncInfo);
-    if (Err)
-      return ol_impl_result_t::fromError(std::move(Err));
+    if (auto Err = Queue->Device->Device->synchronize(Queue->AsyncInfo))
+      return Err;
   }
 
   // Recreate the stream resource so the queue can be reused
   // TODO: Would be easier for the synchronization to (optionally) not release
   // it to begin with.
-  auto Res = Queue->Device->Device->initAsyncInfo(&Queue->AsyncInfo);
-  if (Res)
-    return ol_impl_result_t::fromError(std::move(Res));
+  if (auto Res = Queue->Device->Device->initAsyncInfo(&Queue->AsyncInfo))
+    return Res;
 
-  return OL_SUCCESS;
+  return Error::success();
 }
 
-ol_impl_result_t olWaitEvent_impl(ol_event_handle_t Event) {
-  auto Res = Event->Queue->Device->Device->syncEvent(Event->EventInfo);
-  if (Res)
-    return ol_impl_result_t::fromError(std::move(Res));
+Error olWaitEvent_impl(ol_event_handle_t Event) {
+  if (auto Res = Event->Queue->Device->Device->syncEvent(Event->EventInfo))
+    return Res;
 
-  return OL_SUCCESS;
+  return Error::success();
 }
 
-ol_impl_result_t olDestroyEvent_impl(ol_event_handle_t Event) {
-  auto Res = Event->Queue->Device->Device->destroyEvent(Event->EventInfo);
-  if (Res)
-    return {OL_ERRC_INVALID_EVENT, "The event could not be destroyed"};
+Error olDestroyEvent_impl(ol_event_handle_t Event) {
+  if (auto Res = Event->Queue->Device->Device->destroyEvent(Event->EventInfo))
+    return Res;
 
   return olDestroy(Event);
 }
 
 ol_event_handle_t makeEvent(ol_queue_handle_t Queue) {
   auto EventImpl = std::make_unique<ol_event_impl_t>(nullptr, Queue);
-  auto Res = Queue->Device->Device->createEvent(&EventImpl->EventInfo);
-  if (Res) {
+  if (auto Res = Queue->Device->Device->createEvent(&EventImpl->EventInfo)) {
     llvm::consumeError(std::move(Res));
     return nullptr;
   }
 
-  Res = Queue->Device->Device->recordEvent(EventImpl->EventInfo,
-                                           Queue->AsyncInfo);
-  if (Res) {
+  if (auto Res = Queue->Device->Device->recordEvent(EventImpl->EventInfo,
+                                                    Queue->AsyncInfo)) {
     llvm::consumeError(std::move(Res));
     return nullptr;
   }
@@ -404,48 +391,45 @@ ol_event_handle_t makeEvent(ol_queue_handle_t Queue) {
   return EventImpl.release();
 }
 
-ol_impl_result_t olMemcpy_impl(ol_queue_handle_t Queue, void *DstPtr,
-                               ol_device_handle_t DstDevice, void *SrcPtr,
-                               ol_device_handle_t SrcDevice, size_t Size,
-                               ol_event_handle_t *EventOut) {
+Error olMemcpy_impl(ol_queue_handle_t Queue, void *DstPtr,
+                    ol_device_handle_t DstDevice, void *SrcPtr,
+                    ol_device_handle_t SrcDevice, size_t Size,
+                    ol_event_handle_t *EventOut) {
   if (DstDevice == HostDevice() && SrcDevice == HostDevice()) {
     if (!Queue) {
       std::memcpy(DstPtr, SrcPtr, Size);
-      return OL_SUCCESS;
+      return Error::success();
     } else {
-      return {OL_ERRC_INVALID_ARGUMENT,
-              "One of DstDevice and SrcDevice must be a non-host device if "
-              "Queue is specified"};
+      return createOffloadError(
+          ErrorCode::INVALID_ARGUMENT,
+          "ane of DstDevice and SrcDevice must be a non-host device if "
+          "queue is specified");
     }
   }
 
   // If no queue is given the memcpy will be synchronous
   auto QueueImpl = Queue ? Queue->AsyncInfo : nullptr;
+  Error Res = Error::success();
 
   if (DstDevice == HostDevice()) {
-    auto Res = SrcDevice->Device->dataRetrieve(DstPtr, SrcPtr, Size, QueueImpl);
-    if (Res)
-      return ol_impl_result_t::fromError(std::move(Res));
+    Res = SrcDevice->Device->dataRetrieve(DstPtr, SrcPtr, Size, QueueImpl);
   } else if (SrcDevice == HostDevice()) {
-    auto Res = DstDevice->Device->dataSubmit(DstPtr, SrcPtr, Size, QueueImpl);
-    if (Res)
-      return ol_impl_result_t::fromError(std::move(Res));
+    Res = DstDevice->Device->dataSubmit(DstPtr, SrcPtr, Size, QueueImpl);
   } else {
-    auto Res = SrcDevice->Device->dataExchange(SrcPtr, *DstDevice->Device,
-                                               DstPtr, Size, QueueImpl);
-    if (Res)
-      return ol_impl_result_t::fromError(std::move(Res));
+    Res = SrcDevice->Device->dataExchange(SrcPtr, *DstDevice->Device, DstPtr,
+                                          Size, QueueImpl);
   }
+  if (Res)
+    return Res;
 
   if (EventOut)
     *EventOut = makeEvent(Queue);
 
-  return OL_SUCCESS;
+  return Error::success();
 }
 
-ol_impl_result_t olCreateProgram_impl(ol_device_handle_t Device,
-                                      const void *ProgData, size_t ProgDataSize,
-                                      ol_program_handle_t *Program) {
+Error olCreateProgram_impl(ol_device_handle_t Device, const void *ProgData,
+                           size_t ProgDataSize, ol_program_handle_t *Program) {
   // Make a copy of the program binary in case it is released by the caller.
   auto ImageData = MemoryBuffer::getMemBufferCopy(
       StringRef(reinterpret_cast<const char *>(ProgData), ProgDataSize));
@@ -462,47 +446,45 @@ ol_impl_result_t olCreateProgram_impl(ol_device_handle_t Device,
       Device->Device->loadBinary(Device->Device->Plugin, &Prog->DeviceImage);
   if (!Res) {
     delete Prog;
-    return ol_impl_result_t::fromError(Res.takeError());
+    return Res.takeError();
   }
 
   Prog->Image = *Res;
   *Program = Prog;
 
-  return OL_SUCCESS;
+  return Error::success();
 }
 
-ol_impl_result_t olDestroyProgram_impl(ol_program_handle_t Program) {
+Error olDestroyProgram_impl(ol_program_handle_t Program) {
   return olDestroy(Program);
 }
 
-ol_impl_result_t olGetKernel_impl(ol_program_handle_t Program,
-                                  const char *KernelName,
-                                  ol_kernel_handle_t *Kernel) {
+Error olGetKernel_impl(ol_program_handle_t Program, const char *KernelName,
+                       ol_kernel_handle_t *Kernel) {
 
   auto &Device = Program->Image->getDevice();
   auto KernelImpl = Device.constructKernel(KernelName);
   if (!KernelImpl)
-    return ol_impl_result_t::fromError(KernelImpl.takeError());
+    return KernelImpl.takeError();
 
-  auto Err = KernelImpl->init(Device, *Program->Image);
-  if (Err)
-    return ol_impl_result_t::fromError(std::move(Err));
+  if (auto Err = KernelImpl->init(Device, *Program->Image))
+    return Err;
 
   *Kernel = &*KernelImpl;
 
-  return OL_SUCCESS;
+  return Error::success();
 }
 
-ol_impl_result_t
-olLaunchKernel_impl(ol_queue_handle_t Queue, ol_device_handle_t Device,
-                    ol_kernel_handle_t Kernel, const void *ArgumentsData,
-                    size_t ArgumentsSize,
-                    const ol_kernel_launch_size_args_t *LaunchSizeArgs,
-                    ol_event_handle_t *EventOut) {
+Error olLaunchKernel_impl(ol_queue_handle_t Queue, ol_device_handle_t Device,
+                          ol_kernel_handle_t Kernel, const void *ArgumentsData,
+                          size_t ArgumentsSize,
+                          const ol_kernel_launch_size_args_t *LaunchSizeArgs,
+                          ol_event_handle_t *EventOut) {
   auto *DeviceImpl = Device->Device;
   if (Queue && Device != Queue->Device) {
-    return {OL_ERRC_INVALID_DEVICE,
-            "Device specified does not match the device of the given queue"};
+    return createOffloadError(
+        ErrorCode::INVALID_DEVICE,
+        "device specified does not match the device of the given queue");
   }
 
   auto *QueueImpl = Queue ? Queue->AsyncInfo : nullptr;
@@ -529,12 +511,12 @@ olLaunchKernel_impl(ol_queue_handle_t Queue, ol_device_handle_t Device,
 
   AsyncInfoWrapper.finalize(Err);
   if (Err)
-    return ol_impl_result_t::fromError(std::move(Err));
+    return Err;
 
   if (EventOut)
     *EventOut = makeEvent(Queue);
 
-  return OL_SUCCESS;
+  return Error::success();
 }
 
 } // namespace offload
diff --git a/offload/tools/offload-tblgen/EntryPointGen.cpp b/offload/tools/offload-tblgen/EntryPointGen.cpp
index 66b9665292e15..853358d21c8ca 100644
--- a/offload/tools/offload-tblgen/EntryPointGen.cpp
+++ b/offload/tools/offload-tblgen/EntryPointGen.cpp
@@ -23,7 +23,7 @@ using namespace offload::tblgen;
 static void EmitValidationFunc(const FunctionRec &F, raw_ostream &OS) {
   OS << CommentsHeader;
   // Emit preamble
-  OS << formatv("{0}_impl_result_t {1}_val(\n  ", PrefixLower, F.getName());
+  OS << formatv("llvm::Error {0}_val(\n  ", F.getName());
   // Emit arguments
   std::string ParamNameList = "";
   for (auto &Param : F.getParams()) {
@@ -42,7 +42,9 @@ static void EmitValidationFunc(const FunctionRec &F, raw_ostream &OS) {
       if (Condition.starts_with("`") && Condition.ends_with("`")) {
         auto ConditionString = Condition.substr(1, Condition.size() - 2);
         OS << formatv(TAB_2 "if ({0}) {{\n", ConditionString);
-        OS << formatv(TAB_3 "return {0};\n", Return.getValue());
+        OS << formatv(TAB_3 "return createOffloadError(error::ErrorCode::{0}, "
+                            "\"validation failure: {1}\");\n",
+                      Return.getEtorValue(), ConditionString);
         OS << TAB_2 "}\n\n";
       }
     }
@@ -78,8 +80,9 @@ static void EmitEntryPointFunc(const FunctionRec &F, raw_ostream &OS) {
 
   // Perform actual function call to the validation wrapper
   ParamNameList = ParamNameList.substr(0, ParamNameList.size() - 2);
-  OS << formatv(TAB_1 "{0}_result_t Result = {1}_val({2});\n\n", PrefixLower,
-                F.getName(), ParamNameList);
+  OS << formatv(
+      TAB_1 "{0}_result_t Result = llvmErrorToOffloadError({1}_val({2}));\n\n",
+      PrefixLower, F.getName(), ParamNameList);
 
   // Emit post-call prints
   OS << TAB_1 "if (offloadConfig().TracingEnabled) {\n";
diff --git a/offload/tools/offload-tblgen/MiscGen.cpp b/offload/tools/offload-tblgen/MiscGen.cpp
index b73d70d58c239..20cf5b7e160bf 100644
--- a/offload/tools/offload-tblgen/MiscGen.cpp
+++ b/offload/tools/offload-tblgen/MiscGen.cpp
@@ -61,7 +61,7 @@ void EmitOffloadImplFuncDecls(const RecordKeeper &Records, raw_ostream &OS) {
   OS << GenericHeader;
   for (auto *R : Records.getAllDerivedDefinitions("Function")) {
     FunctionRec F{R};
-    OS << formatv("{0}_impl_result_t {1}_impl(", PrefixLower, F.getName());
+    OS << formatv("llvm::Error {0}_impl(", F.getName());
     auto Params = F.getParams();
     for (auto &Param : Params) {
       OS << Param.getType() << " " << Param.getName();
diff --git a/offload/tools/offload-tblgen/RecordTypes.hpp b/offload/tools/offload-tblgen/RecordTypes.hpp
index 686634ed778aa..e09f0c6dc6518 100644
--- a/offload/tools/offload-tblgen/RecordTypes.hpp
+++ b/offload/tools/offload-tblgen/RecordTypes.hpp
@@ -184,6 +184,12 @@ class ReturnRec {
 public:
   ReturnRec(const Record *rec) : rec(rec) {}
   StringRef getValue() const { return rec->getValueAsString("value"); }
+  // Strip the "OL_ERRC_FOO" from the value, resulting in just "FOO"
+  StringRef getEtorValue() const {
+    constexpr const char *ERRC = "ERRC_";
+    auto Start = getValue().find(ERRC) + strlen(ERRC);
+    return getValue().substr(Start);
+  }
   std::vector<StringRef> getConditions() const {
     return rec->getValueAsListOfStrings("conditions");
   }



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