[clang] [CIR] Add binary operators (PR #132420)

[Andy Kaylor via cfe-commits]

================
@@ -143,6 +147,114 @@ class CIRBaseBuilderTy : public mlir::OpBuilder {
     return createCast(loc, cir::CastKind::bitcast, src, newTy);
   }
 
+  mlir::Value createBinop(mlir::Value lhs, cir::BinOpKind kind,
+                          const llvm::APInt &rhs) {
+    return create<cir::BinOp>(lhs.getLoc(), lhs.getType(), kind, lhs,
+                              getConstAPInt(lhs.getLoc(), lhs.getType(), rhs));
+  }
+
+  mlir::Value createBinop(mlir::Value lhs, cir::BinOpKind kind,
+                          mlir::Value rhs) {
+    return create<cir::BinOp>(lhs.getLoc(), lhs.getType(), kind, lhs, rhs);
+  }
+
+  mlir::Value createBinop(mlir::Location loc, mlir::Value lhs,
+                          cir::BinOpKind kind, mlir::Value rhs) {
+    return create<cir::BinOp>(loc, lhs.getType(), kind, lhs, rhs);
+  }
+
+  mlir::Value createLowBitsSet(mlir::Location loc, unsigned size,
+                               unsigned bits) {
+    llvm::APInt val = llvm::APInt::getLowBitsSet(size, bits);
+    auto type = cir::IntType::get(getContext(), size, false);
----------------
andykaylor wrote:

```suggestion
    auto type = cir::IntType::get(getContext(), size, /*signed=*/false);
```
I think?

https://github.com/llvm/llvm-project/pull/132420