fix review comments.

src/targets/gpu/adjust_allocation.cpp

@@ -12,6 +12,10 @@ void adjust_allocation::apply(program& p) const
 {
     for(auto ins : iterator_for(p))
     {
+        // skip instruction with no input
+        if (ins->inputs().empty())
+            continue;
+            
         if(ins->name() == "load")
             continue;
 

src/targets/gpu/include/migraphx/gpu/adjust_allocation.hpp

@@ -12,7 +12,6 @@ namespace gpu {
 
 struct adjust_allocation
 {
-    context* ctx = nullptr;
     std::string name() const { return "gpu::adjust_allocation"; }
     void apply(program& p) const;
 };