[clang] [CIR] Upstream CastOp and scalar conversions (PR #130690)

[Andy Kaylor via cfe-commits]

================
@@ -78,6 +79,67 @@ class CIRBaseBuilderTy : public mlir::OpBuilder {
     return create<cir::StoreOp>(loc, val, dst);
   }
 
+  //===--------------------------------------------------------------------===//
+  // Cast/Conversion Operators
+  //===--------------------------------------------------------------------===//
+
+  mlir::Value createCast(mlir::Location loc, cir::CastKind kind,
+                         mlir::Value src, mlir::Type newTy) {
+    if (newTy == src.getType())
+      return src;
+    return create<cir::CastOp>(loc, newTy, kind, src);
+  }
+
+  mlir::Value createCast(cir::CastKind kind, mlir::Value src,
+                         mlir::Type newTy) {
+    if (newTy == src.getType())
+      return src;
+    return createCast(src.getLoc(), kind, src, newTy);
+  }
+
+  mlir::Value createIntCast(mlir::Value src, mlir::Type newTy) {
+    return createCast(cir::CastKind::integral, src, newTy);
+  }
+
+  mlir::Value createIntToPtr(mlir::Value src, mlir::Type newTy) {
+    return createCast(cir::CastKind::int_to_ptr, src, newTy);
+  }
+
+  mlir::Value createPtrToInt(mlir::Value src, mlir::Type newTy) {
+    return createCast(cir::CastKind::ptr_to_int, src, newTy);
+  }
+
+  mlir::Value createPtrToBoolCast(mlir::Value v) {
+    return createCast(cir::CastKind::ptr_to_bool, v, getBoolTy());
+  }
+
+  mlir::Value createBoolToInt(mlir::Value src, mlir::Type newTy) {
+    return createCast(cir::CastKind::bool_to_int, src, newTy);
+  }
+
+  mlir::Value createBitcast(mlir::Value src, mlir::Type newTy) {
+    return createCast(cir::CastKind::bitcast, src, newTy);
+  }
+
+  mlir::Value createBitcast(mlir::Location loc, mlir::Value src,
+                            mlir::Type newTy) {
+    return createCast(loc, cir::CastKind::bitcast, src, newTy);
+  }
+
+  mlir::Value createPtrBitcast(mlir::Value src, mlir::Type newPointeeTy) {
+    assert(mlir::isa<cir::PointerType>(src.getType()) && "expected ptr src");
+    return createBitcast(src, getPointerTo(newPointeeTy));
+  }
+
+  mlir::Value createAddrSpaceCast(mlir::Location loc, mlir::Value src,
----------------
andykaylor wrote:

I'm guessing these aren't used either. I don't think we have upstreamed any address space support, have we?

https://github.com/llvm/llvm-project/pull/130690