Update after llvm::Triple changes (#3046)

Update after llvm-project commit `979c275097a6 ("[IR] Store Triple in
Module (NFC) (#129868)", 2025-03-06)`.

Author: svenvh

lib/SPIRV/SPIRVReader.cpp

@@ -3925,11 +3925,11 @@ bool SPIRVToLLVM::translate() {
 bool SPIRVToLLVM::transAddressingModel() {
   switch (BM->getAddressingModel()) {
   case AddressingModelPhysical64:
-    M->setTargetTriple(SPIR_TARGETTRIPLE64);
+    M->setTargetTriple(Triple(SPIR_TARGETTRIPLE64));
     M->setDataLayout(SPIR_DATALAYOUT64);
     break;
   case AddressingModelPhysical32:
-    M->setTargetTriple(SPIR_TARGETTRIPLE32);
+    M->setTargetTriple(Triple(SPIR_TARGETTRIPLE32));
     M->setDataLayout(SPIR_DATALAYOUT32);
     break;
   case AddressingModelLogical:

lib/SPIRV/SPIRVWriter.cpp

@@ -5489,7 +5489,7 @@ SPIRVValue *LLVMToSPIRVBase::transAsmINTEL(InlineAsm *IA) {
   // TODO: intention here is to provide information about actual target
   //       but in fact spir-64 is substituted as triple when translator works
   //       eventually we need to fix it (not urgent)
-  StringRef TripleStr(M->getTargetTriple());
+  StringRef TripleStr(M->getTargetTriple().str());
   auto *AsmTarget = static_cast<SPIRVAsmTargetINTEL *>(
       BM->getOrAddAsmTargetINTEL(TripleStr.str()));
   auto *SIA = BM->addAsmINTEL(
@@ -7000,7 +7000,8 @@ bool isValidLLVMModule(Module *M, SPIRVErrorLog &ErrorLog) {
 
   Triple TT(M->getTargetTriple());
   if (!ErrorLog.checkError(isSupportedTriple(TT), SPIRVEC_InvalidTargetTriple,
-                           "Actual target triple is " + M->getTargetTriple()))
+                           "Actual target triple is " +
+                               M->getTargetTriple().str()))
     return false;
 
   return true;
@@ -7101,7 +7102,7 @@ bool runSpirvBackend(Module *M, std::string &Result, std::string &ErrMsg,
                              ? Triple::spirv64
                              : Triple::spirv32,
                          TargetTriple.getSubArch());
-    M->setTargetTriple(TargetTriple.str());
+    M->setTargetTriple(TargetTriple);
     // We need to reset Data Layout to conform with the TargetMachine
     M->setDataLayout("");
   }
@@ -7110,7 +7111,7 @@ bool runSpirvBackend(Module *M, std::string &Result, std::string &ErrMsg,
       TargetTriple.setTriple(DefaultTriple);
     TargetTriple.setArch(TargetTriple.getArch(),
                          spirvVersionToSubArch(TranslatorOpts.getMaxVersion()));
-    M->setTargetTriple(TargetTriple.str());
+    M->setTargetTriple(TargetTriple);
   }
 
   // Translate the Module into SPIR-V