[llvm] [SandboxIR] Added new StoreInst::create() functions with isVolatile arg (PR #100961)

[via llvm-commits]

================
@@ -810,10 +815,45 @@ define void @foo(i8 %val, ptr %ptr) {
   sandboxir::StoreInst *NewSt =
       sandboxir::StoreInst::create(Val, Ptr, Align(8),
                                    /*InsertBefore=*/Ret, Ctx);
+  // Check if create was volatile
+  EXPECT_FALSE(NewSt->isVolatile());
   EXPECT_EQ(NewSt->getType(), St->getType());
   EXPECT_EQ(NewSt->getValueOperand(), Val);
   EXPECT_EQ(NewSt->getPointerOperand(), Ptr);
   EXPECT_EQ(NewSt->getAlign(), 8);
+  // Check create(InsertBefore, IsVolatile=true)
+  sandboxir::StoreInst *NewVSt =
+      sandboxir::StoreInst::create(Val, Ptr, Align(8),
+                                   /*InsertBefore=*/Ret,
+                                   /*IsVolatile=*/true, Ctx);
+  // Check if create was volatile
+  EXPECT_TRUE(NewVSt->isVolatile());
+
----------------
vporpo wrote:

I think we should add the same checks as above:
```
  EXPECT_EQ(NewVSt->getType(), St->getType());
  EXPECT_EQ(NewVSt->getValueOperand(), Val);
  EXPECT_EQ(NewVSt->getPointerOperand(), Ptr);
  EXPECT_EQ(NewVSt->getAlign(), 8);
  ```
And also let's also check the instruction position (you can also add this check above too).
```
EXPECT_EQ(NewVSt->getNextNode(), Ret);
```

https://github.com/llvm/llvm-project/pull/100961