remove expensive copy of options passed (#82577)

Codegen option is passed copy by value which 138 bytes of copy and used
as read-only. Making pass by const reference.

Author: mahesh-attarde

llvm/include/llvm/Passes/CodeGenPassBuilder.h

@@ -111,7 +111,8 @@ namespace llvm {
 /// construction.
 template <typename DerivedT> class CodeGenPassBuilder {
 public:
-  explicit CodeGenPassBuilder(LLVMTargetMachine &TM, CGPassBuilderOption Opts,
+  explicit CodeGenPassBuilder(LLVMTargetMachine &TM,
+                              const CGPassBuilderOption &Opts,
                               PassInstrumentationCallbacks *PIC)
       : TM(TM), Opt(Opts), PIC(PIC) {
     // Target could set CGPassBuilderOption::MISchedPostRA to true to achieve

llvm/lib/Target/X86/X86CodeGenPassBuilder.cpp

@@ -22,7 +22,7 @@ namespace {
 class X86CodeGenPassBuilder : public CodeGenPassBuilder<X86CodeGenPassBuilder> {
 public:
   explicit X86CodeGenPassBuilder(LLVMTargetMachine &TM,
-                                 CGPassBuilderOption Opts,
+                                 const CGPassBuilderOption &Opts,
                                  PassInstrumentationCallbacks *PIC)
       : CodeGenPassBuilder(TM, Opts, PIC) {}
   void addPreISel(AddIRPass &addPass) const;