[CodeGen] Add constant and jump table state

Add stable, tombstone-preserving MachineConstantPool and MachineJumpTableInfo ownership. Define the versioned TargetConstant contract and integrate all table references with builders, verification, and deterministic deep cloning.

1 files changed, 2 insertions, 1 deletions

diff --git a/backend/lib/CodeGen/MachineFunction.cpp b/backend/lib/CodeGen/MachineFunction.cpp
index fc1508c..64b6440 100644
--- a/backend/lib/CodeGen/MachineFunction.cpp
+++ b/backend/lib/CodeGen/MachineFunction.cpp
@@ -64,7 +64,8 @@ MachineFunction::create(std::string Name, MachineFunctionStableID StableID) {
 }
 
 MachineFunction::MachineFunction(std::string Name, MachineFunctionStableID StableID)
-    : Name(std::move(Name)), StableID(StableID), Arena(std::make_unique<MachineArena>()) {}
+    : Name(std::move(Name)), StableID(StableID), JumpTables(*this),
+      Arena(std::make_unique<MachineArena>()) {}
 
 MachineFunction::~MachineFunction() {
   for (MachineBasicBlock *Block = FirstBlock; Block != nullptr; Block = Block->NextBlock) {