Remove attribute hacks from LLVM 6.0

Author: CodaFi

Sources/LLVM/Function+Attributes.swift

@@ -343,17 +343,6 @@ extension Function {
   /// - parameter index: The index representing the function, its return value
   ///   or one of its parameters.
   public func removeAttribute(_ attrKind: AttributeKind, from index: AttributeIndex) {
-    // FIXME: Remove when LLVM 7.0.0 is released.
-    guard  attrKind != .align
-        && attrKind != .alignstack
-        && attrKind != .allocsize
-        && attrKind != .dereferenceable
-        && attrKind != .dereferenceableOrNull else {
-          fatalError(
-            "Removing valued enum attributes crashes in LLVM <7.0.0 " +
-            "and is currently disabled in LLVMSwift.")
-    }
-
     LLVMRemoveEnumAttributeAtIndex(llvm, index.rawValue, attrKind.id)
   }
 

Tests/LLVMTests/IRAttributesSpec.swift

@@ -131,9 +131,6 @@ class IRAttributesSpec : XCTestCase {
       XCTAssertEqual(enumAttr.value, value)
       XCTAssert(fn.attributes(at: .function).contains { $0.asLLVM() == enumAttr.asLLVM() })
 
-      // FIXME: Remove when LLVM 7.0.0 is released.
-      guard value == 0 else { continue }
-
       fn.removeAttribute(enumAttr, from: .function)
       XCTAssertFalse(fn.attributes(at: .function).contains { $0.asLLVM() == enumAttr.asLLVM() })
 
@@ -195,9 +192,6 @@ class IRAttributesSpec : XCTestCase {
       XCTAssertEqual(enumAttr.value, value)
       XCTAssert(fn.attributes(at: .returnValue).contains { $0.asLLVM() == enumAttr.asLLVM() })
 
-      // FIXME: Remove when LLVM 7.0.0 is released.
-      guard value == 0 else { continue }
-
       fn.removeAttribute(enumAttr, from: .returnValue)
       XCTAssertFalse(fn.attributes(at: .returnValue).contains { $0.asLLVM() == enumAttr.asLLVM() })
 
@@ -211,9 +205,6 @@ class IRAttributesSpec : XCTestCase {
       XCTAssertEqual(enumAttr.value, value)
       XCTAssert(fn.attributes(at: .argument(0)).contains { $0.asLLVM() == enumAttr.asLLVM() })
 
-      // FIXME: Remove when LLVM 7.0.0 is released.
-      guard value == 0 else { continue }
-
       fn.removeAttribute(enumAttr, from: .argument(0))
       XCTAssertFalse(fn.attributes(at: .argument(0)).contains { $0.asLLVM() == enumAttr.asLLVM() })