Distinguish signed and unsigned constants

Author: CodaFi

Sources/LLVM/IntType.swift

@@ -35,17 +35,29 @@ public struct IntType: IRType {
     return null()
   }
 
-  /// Creates an integer constant value with the given Swift integer value.
+  /// Creates an unsigned integer constant value with the given Swift integer value.
   ///
   /// - parameter value: A Swift integer value.
   /// - parameter signExtend: Whether to sign-extend this value to fit this
   ///   type's bit width.  Defaults to `false`.
-  public func constant<IntTy: Integer>(_ value: IntTy, signExtend: Bool = false) -> IRValue {
-    return LLVMConstInt(asLLVM(),
-                        UInt64(bitPattern: value.toIntMax()),
-                        signExtend.llvm)
+  public func constant<IntTy: UnsignedInteger>(_ value: IntTy, signExtend: Bool = false) -> Constant {
+    return Constant(llvm: LLVMConstInt(asLLVM(),
+                          unsafeBitCast(value.toIntMax(), to: UInt64.self),
+                          signExtend.llvm), representation: .unsigned)
   }
 
+  /// Creates a signed integer constant value with the given Swift integer value.
+  ///
+  /// - parameter value: A Swift integer value.
+  /// - parameter signExtend: Whether to sign-extend this value to fit this
+  ///   type's bit width.  Defaults to `false`.
+  public func constant<IntTy: SignedInteger>(_ value: IntTy, signExtend: Bool = false) -> Constant {
+    return Constant(llvm: LLVMConstInt(asLLVM(),
+                                       unsafeBitCast(value.toIntMax(), to: UInt64.self),
+                                       signExtend.llvm), representation: .signed)
+  }
+
+
   /// Retrieves an integer value of this type's bit width consisting of all
   /// one-bits.
   ///