Feature-gate for libgccjit 12

Author: antoyo

src/builder.rs

@@ -1391,6 +1391,7 @@ impl<'a, 'gcc, 'tcx> Builder<'a, 'gcc, 'tcx> {
         unimplemented!();
     }
 
+    #[cfg(feature="master")]
     pub fn vector_reduce<F>(&mut self, src: RValue<'gcc>, op: F) -> RValue<'gcc>
     where F: Fn(RValue<'gcc>, RValue<'gcc>, &'gcc Context<'gcc>) -> RValue<'gcc>
     {
@@ -1417,6 +1418,13 @@ impl<'a, 'gcc, 'tcx> Builder<'a, 'gcc, 'tcx> {
             .to_rvalue()
     }
 
+    #[cfg(not(feature="master"))]
+    pub fn vector_reduce<F>(&mut self, src: RValue<'gcc>, op: F) -> RValue<'gcc>
+    where F: Fn(RValue<'gcc>, RValue<'gcc>, &'gcc Context<'gcc>) -> RValue<'gcc>
+    {
+        unimplemented!();
+    }
+
     pub fn vector_reduce_op(&mut self, src: RValue<'gcc>, op: BinaryOp) -> RValue<'gcc> {
         self.vector_reduce(src, |a, b, context| context.new_binary_op(None, op, a.get_type(), a, b))
     }