[Driver][SYCL] Add initial SYCL offload compilation support (#117268)

Introduces the SYCL based toolchain and initial toolchain construction
when using the '-fsycl' option. This option will enable SYCL based
offloading, creating a SPIR-V based IR file packaged into the compiled
host object.

This includes early support for creating the host/device object using
the new offloading model. The device object is created using the
spir64-unknown-unknown target triple.

New/Updated Options:
 -fsycl  Enables SYCL offloading for host and device
 -fsycl-device-only
         Enables device only compilation for SYCL
 -fsycl-host-only
         Enables host only compilation for SYCL

RFC Reference:
https://discourse.llvm.org/t/rfc-sycl-driver-enhancements/74092

This is a reland of: https://github.com/llvm/llvm-project/pull/107493

1 files changed, 5 insertions, 4 deletions

diff --git a/clang/lib/Driver/Compilation.cpp b/clang/lib/Driver/Compilation.cpp
index 4d40805..a39952e 100644
--- a/clang/lib/Driver/Compilation.cpp
+++ b/clang/lib/Driver/Compilation.cpp
@@ -214,10 +214,11 @@ static bool ActionFailed(const Action *A,
   if (FailingCommands.empty())
     return false;
 
-  // CUDA/HIP can have the same input source code compiled multiple times so do
-  // not compiled again if there are already failures. It is OK to abort the
-  // CUDA pipeline on errors.
-  if (A->isOffloading(Action::OFK_Cuda) || A->isOffloading(Action::OFK_HIP))
+  // CUDA/HIP/SYCL can have the same input source code compiled multiple times
+  // so do not compile again if there are already failures. It is OK to abort
+  // the CUDA/HIP/SYCL pipeline on errors.
+  if (A->isOffloading(Action::OFK_Cuda) || A->isOffloading(Action::OFK_HIP) ||
+      A->isOffloading(Action::OFK_SYCL))
     return true;
 
   for (const auto &CI : FailingCommands)