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This PR is one of the many PRs in the SYCL upstreaming effort focusing on device code linking during the SYCL offload compilation process. RFC: https://discourse.llvm.org/t/rfc-offloading-design-for-sycl-offload-kind-and-spir-targets/74088 In this PR, we introduce a new tool that will be used to perform device code linking for SYCL offload kind. It accepts SYCL device objects in LLVM IR bitcode format and will generate a fully linked device object that can then be wrapped and linked into the host object. A primary use case for this tool is to perform device code linking for objects with SYCL offload kind inside the clang-linker-wrapper. It can also be invoked via clang driver as follows: `clang --target=spirv64 --sycl-link input.bc` Device code linking for SYCL offloading kind has a number of known quirks that makes it difficult to use in a unified offloading setting. Two of the primary issues are: 1. Several finalization steps are required to be run on the fully-linked LLVM IR bitcode to gaurantee conformance to SYCL standards. This step is unique to SYCL offloading compilation flow. 2. SPIR-V LLVM Translator tool is an extenal tool and hence SPIR-V IR code generation cannot be done as part of LTO. This limitation will be lifted once SPIR-V backend is available as a viable LLVM backend. Hence, we introduce this new tool to provide a clean wrapper to perform SYCL device linking. Co-Author: Michael Toguchi Thanks --------- Signed-off-by: Arvind Sudarsanam <arvind.sudarsanam@intel.com>
10 lines
564 B
C++
10 lines
564 B
C++
// Tests the driver when linking LLVM IR bitcode files and targeting SPIR-V
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// architecture.
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//
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// Test that -Xlinker options are being passed to clang-sycl-linker.
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// RUN: touch %t.bc
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// RUN: %clangxx -### --target=spirv64 --sycl-link -Xlinker --llvm-spirv-path=/tmp \
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// RUN: -Xlinker --library-path=/tmp -Xlinker --device-libs=lib1.bc,lib2.bc %t.bc 2>&1 \
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// RUN: | FileCheck %s -check-prefix=XLINKEROPTS
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// XLINKEROPTS: "{{.*}}clang-sycl-linker{{.*}}" "--llvm-spirv-path=/tmp" "--library-path=/tmp" "--device-libs=lib1.bc,lib2.bc" "{{.*}}.bc" "-o" "a.out"
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