Swift SIL: add Function.hasSemanticsAttribute

Author: eeckstein

SwiftCompilerSources/Sources/SIL/Function.swift

@@ -65,6 +65,12 @@ final public class Function : CustomStringConvertible, HasShortDescription {
     return nil
   }
 
+  public func hasSemanticsAttribute(_ attr: StaticString) -> Bool {
+    attr.withUTF8Buffer { (buffer: UnsafeBufferPointer<UInt8>) in
+      SILFunction_hasSemanticsAttr(bridged, BridgedStringRef(data: buffer.baseAddress!, length: buffer.count)) != 0
+    }
+  }
+
   /// True, if the function runs with a swift 5.1 runtime.
   /// Note that this is function specific, because inlinable functions are de-serialized
   /// in a client module, which might be compiled with a different deployment target.

include/swift/SIL/SILBridging.h

@@ -202,6 +202,8 @@ SwiftInt SILFunction_getNumSILArguments(BridgedFunction function);
 BridgedType SILFunction_getSILArgumentType(BridgedFunction function, SwiftInt idx);
 BridgedType SILFunction_getSILResultType(BridgedFunction function);
 SwiftInt SILFunction_isSwift51RuntimeAvailable(BridgedFunction function);
+SwiftInt SILFunction_hasSemanticsAttr(BridgedFunction function,
+                                      BridgedStringRef attrName);
 
 BridgedStringRef SILGlobalVariable_getName(BridgedGlobalVar global);
 std::string SILGlobalVariable_debugDescription(BridgedGlobalVar global);

lib/SIL/Utils/SILBridging.cpp

@@ -218,6 +218,12 @@ SwiftInt SILFunction_isSwift51RuntimeAvailable(BridgedFunction function) {
     ctxt.getSwift51Availability());
 }
 
+SwiftInt SILFunction_hasSemanticsAttr(BridgedFunction function,
+                                     BridgedStringRef attrName) {
+  SILFunction *f = castToFunction(function);
+  return f->hasSemanticsAttr(getStringRef(attrName)) ? 1 : 0;
+}
+
 //===----------------------------------------------------------------------===//
 //                               SILBasicBlock
 //===----------------------------------------------------------------------===//