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

[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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vporpo wrote:

InstUnion contains sandboxir::LoadInst or sandboxir::StoreInst, so this should be:
```
if (LoadInst *Load = InstUnion.dyn_cast<LoadInst>())
   Load->setVolatile(WasVolatile);
else if (StoreInst *Store = InstUnion.dyn_cast<StoreInst>())
   Store->setVolatile(SetVolatile);
else
   llvm_unreachable("Expected LoadInst or StoreInst");
```

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