[clang] [llvm] [clang][Driver] Add HIPAMD Driver support for AMDGCN flavoured SPIR-V (PR #95061)

[Dmitry Sidorov via llvm-commits]

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@@ -193,6 +194,33 @@ void AMDGCN::Linker::constructLldCommand(Compilation &C, const JobAction &JA,
                                          Lld, LldArgs, Inputs, Output));
 }
 
+// For SPIR-V the inputs for the job are device AMDGCN SPIR-V flavoured bitcode
+// and the output is either a compiled SPIR-V binary or bitcode (-emit-llvm). It
+// calls llvm-link and then the llvm-spirv translator. Once the SPIR-V BE will
+// be promoted from experimental, we will switch to using that. TODO: consider
+// if we want to run any targeted optimisations over IR here, over generic
+// SPIR-V.
+void AMDGCN::Linker::constructLinkAndEmitSpirvCommand(
+    Compilation &C, const JobAction &JA, const InputInfoList &Inputs,
+    const InputInfo &Output, const llvm::opt::ArgList &Args) const {
+  assert(!Inputs.empty() && "Must have at least one input.");
+
+  constructLlvmLinkCommand(C, JA, Inputs, Output, Args);
+
+  // Linked BC is now in Output
+
+  // Emit SPIR-V binary.
+  llvm::opt::ArgStringList TrArgs{
+      "--spirv-max-version=1.6",
+      "--spirv-ext=+all",
+      "--spirv-allow-extra-diexpressions",
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MrSidims wrote:

@AlexVlx nit: if generation of NonSemantic.Shader.DebugInfo.200 is turned on - this option is not needed as the extended instruction already adds all DWARF expressions (including LLVM-specific expressions).

https://github.com/llvm/llvm-project/pull/95061