[llvm] [SandboxIR] Added setVolatile member function to LoadInst and StoreInst (PR #101284)

[Julius Alexandre via llvm-commits]

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@@ -160,6 +160,34 @@ void CallBrInstSetIndirectDest::dump() const {
 }
 #endif
 
+SetVolatile::SetVolatile(Instruction *I, bool WasBool, Tracker &Tracker)
+    : IRChangeBase(Tracker), Inst(I) {
+  if (auto *Load = cast<llvm::LoadInst>(Inst)) {
+    WasVolatile = Load->isVolatile();
+    InstUnion = Load;
+  }
+  if (auto *Store = cast<llvm::StoreInst>(Inst)) {
+    WasVolatile = Store->isVolatile();
+    InstUnion = Store;
+  }
+}
+
+void SetVolatile::revert() {
+  if (llvm::LoadInst *Load = InstUnion.dyn_cast<llvm::LoadInst *>()) {
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medievalghoul wrote:

I ended up getting a error message removing `llvm::` namespace.

<details>
<summary> Error Message </summary>

```
/Users/juliusalexandre/GitDownloads/llvm-project/llvm/include/llvm/ADT/STLExtras.h:171:42: error: implicit instantiation of undefined template 'llvm::FirstIndexOfType<llvm::sandboxir::LoadInst *>'
    : std::integral_constant<size_t, 1 + FirstIndexOfType<T, Us...>::value> {};
                                         ^
/Users/juliusalexandre/GitDownloads/llvm-project/llvm/include/llvm/ADT/STLExtras.h:171:42: note: in instantiation of template class 'llvm::FirstIndexOfType<llvm::sandboxir::LoadInst *, llvm::LoadInst *>' requested here
/Users/juliusalexandre/GitDownloads/llvm-project/llvm/include/llvm/ADT/PointerUnion.h:230:30: note: in instantiation of template class 'llvm::FirstIndexOfType<llvm::sandboxir::LoadInst *, llvm::StoreInst *, llvm::LoadInst *>' requested here
    return F.Val.getInt() == FirstIndexOfType<To, PTs...>::value;
```
</details>

https://github.com/llvm/llvm-project/pull/101284