Re-apply LLVM 15 MCStreamer API naming fixes

Re-apply `MCStreamer` API changes from eb6c96c that have been reverted due to
the caused regression. Change the original approach by simplifying the
`finish()` API wrapper - let LLVM initialize the default `EndLoc` argument
value instead.

Author: Artem Gindinson

IGC/DebugInfo/StreamEmitter.cpp

@@ -491,7 +491,8 @@ const MCSection *StreamEmitter::GetDwarfFrameSection() const {
 
 void StreamEmitter::SwitchSection(const MCSection *pSection,
                                   const MCExpr *pSubsection) const {
-  m_pMCStreamer->SwitchSection(const_cast<MCSection *>(pSection), pSubsection);
+  IGCLLVM::switchSection(m_pMCStreamer, const_cast<MCSection *>(pSection),
+                         pSubsection);
 }
 
 MCSymbol *StreamEmitter::GetSymbol(const GlobalValue *pGV) const {
@@ -781,7 +782,7 @@ void StreamEmitter::SetMCLineTableSymbol(MCSymbol *pSym, unsigned id) const {
 }
 
 void StreamEmitter::Finalize() const {
-  m_pMCStreamer->Finish();
+  IGCLLVM::finish(m_pMCStreamer);
   m_pMCStreamer->reset();
 }
 

IGC/WrapperLLVM/include/llvmWrapper/MC/MCStreamer.h

@@ -20,6 +20,23 @@ inline void initSections(llvm::MCStreamer *streamer, bool NoExecStack, const llv
     streamer->InitSections(NoExecStack);
 #endif
 }
+
+inline void switchSection(llvm::MCStreamer *streamer, llvm::MCSection *Section,
+                          const llvm::MCExpr *Subsection = nullptr) {
+#if LLVM_VERSION_MAJOR >= 15
+    streamer->switchSection(Section, Subsection);
+#else
+    streamer->SwitchSection(Section, Subsection);
+#endif
+}
+
+inline void finish(llvm::MCStreamer *streamer) {
+#if LLVM_VERSION_MAJOR >= 15
+    streamer->finish();
+#else
+    streamer->Finish();
+#endif
+}
 }
 
 #endif