fix #2468, fix #2458 (add support for unsafe_ref(::Ptr{Any}))

Author: vtjnash

src/intrinsics.cpp

@@ -405,6 +405,10 @@ static Value *emit_pointerref(jl_value_t *e, jl_value_t *i, jl_codectx_t *ctx)
     Value *idx = emit_unbox(T_size, T_psize, emit_unboxed(i, ctx));
     Value *im1 = builder.CreateSub(idx, ConstantInt::get(T_size, 1));
     if (!jl_is_bitstype(ety)) {
+        if (ety == (jl_value_t*)jl_any_type)
+            return builder.CreateLoad(builder.CreateGEP(
+                        builder.CreateBitCast(thePtr, jl_ppvalue_llvmt),
+                        im1));
         if (!jl_is_structtype(ety) || jl_is_array_type(ety) || !jl_is_leaf_type(ety))
             jl_error("pointerref: invalid pointer type");
         uint64_t size = ((jl_datatype_t*)ety)->size;

test/core.jl

@@ -468,7 +468,7 @@ begin
     @test a == [11,99,13]
     a2 = Any[101,102,103]
     p2 = pointer(a2)
-    @test_fails unsafe_ref(p2) == 101
+    @test unsafe_ref(p2) == 101
     @test_fails unsafe_assign(p2, 909, 3)
     @test a2 == [101,102,103]
 end