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

[Paul Kirth via llvm-commits]

ilovepi wrote:

We're seeing SYCL tests fail on Linux builders after this patch https://ci.chromium.org/ui/p/fuchsia/builders/toolchain.ci/clang-host-linux-x64/b8726474372098645345/overview

```
Exit Code: 1

Command Output (stderr):
--
RUN: at line 1: /b/s/w/ir/x/w/llvm_build/bin/clang -### -fsycl -c /b/s/w/ir/x/w/llvm-llvm-project/clang/test/Driver/sycl.c 2>&1 | /b/s/w/ir/x/w/llvm_build/bin/FileCheck /b/s/w/ir/x/w/llvm-llvm-project/clang/test/Driver/sycl.c --check-prefix=ENABLED
+ /b/s/w/ir/x/w/llvm_build/bin/clang -### -fsycl -c /b/s/w/ir/x/w/llvm-llvm-project/clang/test/Driver/sycl.c
+ /b/s/w/ir/x/w/llvm_build/bin/FileCheck /b/s/w/ir/x/w/llvm-llvm-project/clang/test/Driver/sycl.c --check-prefix=ENABLED
/b/s/w/ir/x/w/llvm-llvm-project/clang/test/Driver/sycl.c:18:13: error: ENABLED: expected string not found in input
// ENABLED: "-cc1"{{.*}} "-fsycl-is-device"
            ^
<stdin>:1:1: note: scanning from here
Fuchsia clang version 20.0.0git (https://llvm.googlesource.com/llvm-project d00f65c6acd9f0e1ddae83391f55eb9d232d2f9e)
^
<stdin>:2:14: note: possible intended match here
Target: x86_64-unknown-linux-gnu
             ^

Input file: <stdin>
Check file: /b/s/w/ir/x/w/llvm-llvm-project/clang/test/Driver/sycl.c

-dump-input=help explains the following input dump.

Input was:
<<<<<<
            1: Fuchsia clang version 20.0.0git (https://llvm.googlesource.com/llvm-project d00f65c6acd9f0e1ddae83391f55eb9d232d2f9e) 
check:18'0     X~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ error: no match found
            2: Target: x86_64-unknown-linux-gnu 
check:18'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
check:18'1                  ?                    possible intended match
            3: Thread model: posix 
check:18'0     ~~~~~~~~~~~~~~~~~~~~
            4: InstalledDir: /b/s/w/ir/x/w/llvm_build/bin 
check:18'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>>>>>>
```

Can you take a look, and revert if the fix will take a while?

https://github.com/llvm/llvm-project/pull/117268