[SPIRV] Addition of extension SPV_KHR_non_semantic_info and SPV_KHR_relaxed_extended_instruction

llvm/docs/SPIRVUsage.rst

@@ -237,6 +237,8 @@ Below is a list of supported SPIR-V extensions, sorted alphabetically by their e
      - Adds predicated load and store instructions that conditionally read from or write to memory based on a boolean predicate.
    * - ``SPV_KHR_maximal_reconvergence``
      - Adds execution mode and capability to enable maximal reconvergence.
+   * - `` SPV_KHR_relaxed_extended_instruction``
+     - Adds the ability to have forward declaration in some specific non-semantic instructions.
 
 SPIR-V representation in LLVM IR
 ================================

llvm/lib/Target/SPIRV/MCTargetDesc/SPIRVInstPrinter.cpp

@@ -110,7 +110,8 @@ void SPIRVInstPrinter::printInst(const MCInst *MI, uint64_t Address,
     printOpDecorate(MI, OS);
   } else if (OpCode == SPIRV::OpExtInstImport) {
     recordOpExtInstImport(MI);
-  } else if (OpCode == SPIRV::OpExtInst) {
+  } else if (OpCode == SPIRV::OpExtInst ||
+             OpCode == SPIRV::OpExtInstWithForwardRefsKHR) {
     printOpExtInst(MI, OS);
   } else if (OpCode == SPIRV::UNKNOWN_type) {
     printUnknownType(MI, OS);

llvm/lib/Target/SPIRV/SPIRVCommandLine.cpp

@@ -155,7 +155,9 @@ static const std::map<std::string, SPIRV::Extension::Extension, std::less<>>
         {"SPV_INTEL_predicated_io",
          SPIRV::Extension::Extension::SPV_INTEL_predicated_io},
         {"SPV_KHR_maximal_reconvergence",
-         SPIRV::Extension::Extension::SPV_KHR_maximal_reconvergence}};
+         SPIRV::Extension::Extension::SPV_KHR_maximal_reconvergence},
+        {"SPV_KHR_relaxed_extended_instruction",
+         SPIRV::Extension::Extension::SPV_KHR_relaxed_extended_instruction}};
 
 bool SPIRVExtensionsParser::parse(cl::Option &O, StringRef ArgName,
                                   StringRef ArgValue,