================
@@ -73,10 +77,55 @@ void HIPSPV::Linker::constructLinkAndEmitSpirvCommand(
tools::constructLLVMLinkCommand(C, *this, JA, Inputs, LinkArgs, Output, Args,
TempFile);
- // Post-link HIP lowering.
+ auto T = getToolChain().getTriple();
+
+ if (T.getOS() == llvm::Triple::ChipStar) {
+ // chipStar: run HipSpvPasses via opt, then use the in-tree SPIR-V backend
+ // for codegen (replaces the external llvm-spirv translator).
+
+ // Run HipSpvPasses plugin via opt (must run on LLVM IR before
+ // the SPIR-V backend lowers to MIR).
+ auto PassPluginPath = findPassPlugin(C.getDriver(), Args);
+ if (!PassPluginPath.empty()) {
+ const char *PassPathCStr = C.getArgs().MakeArgString(PassPluginPath);
+ const char *OptOutput = HIP::getTempFile(C, Name + "-lower", "bc");
+ ArgStringList OptArgs{TempFile, "-load-pass-plugin",
+ PassPathCStr, "-passes=hip-post-link-passes",
+ "-o", OptOutput};
+ const char *Opt =
+ Args.MakeArgString(getToolChain().GetProgramPath("opt"));
+ C.addCommand(std::make_unique<Command>(JA, *this,
+ ResponseFileSupport::None(), Opt,
+ OptArgs, Inputs, Output));
+ TempFile = OptOutput;
+ }
- // Run LLVM IR passes to lower/expand/emulate HIP code that does not
translate
- // to SPIR-V (E.g. dynamic shared memory).
+ // Compile processed bitcode to SPIR-V using the in-tree backend.
+ ArgStringList ClangArgs;
+ ClangArgs.push_back("--no-default-config");
+ ClangArgs.push_back("-c");
+ ClangArgs.push_back(C.getArgs().MakeArgString("--target=" +
T.getTriple()));
+
+ ClangArgs.push_back("-mllvm");
+ ClangArgs.push_back("-spirv-ext=+SPV_INTEL_function_pointers"
+ ",+SPV_INTEL_subgroups"
+ ",+SPV_EXT_relaxed_printf_string_address_space"
+ ",+SPV_KHR_bit_instructions"
+ ",+SPV_EXT_shader_atomic_float_add");
+
+ ClangArgs.push_back(TempFile);
+ ClangArgs.push_back("-o");
+ ClangArgs.push_back(Output.getFilename());
+
+ const char *Clang =
+ C.getArgs().MakeArgString(C.getDriver().getClangProgramPath());
----------------
linehill wrote:
Using clang driver for emitting SPIR-V (through SPIR-V BE) seems hazarous - it
think it's better to [use cc1 like HIPAMD
does](https://github.com/llvm/llvm-project/blob/8341e62c6697ab0bbcaf546eba28d5845577f6ee/clang/lib/Driver/ToolChains/HIPAMD.cpp#L171-L187).
https://github.com/llvm/llvm-project/pull/186972
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