integer constant program working up to ir

goalc/compiler/Val.cpp

@@ -1,11 +1,16 @@
 #include "Val.h"
+#include "Env.h"
 
 /*!
  * Fallback to_gpr if a more optimized one is not provided.
  */
 const RegVal* Val::to_gpr(FunctionEnv* fe) const {
-  (void)fe;
-  throw std::runtime_error("Val::to_gpr NYI");  // todo
+  auto rv = to_reg(fe);
+  if(rv->ireg().kind == emitter::RegKind::GPR) {
+    return rv;
+  } else {
+    throw std::runtime_error("Val::to_gpr NYI");  // todo
+  }
 }
 
 /*!
@@ -38,4 +43,10 @@ const RegVal * RegVal::to_xmm(FunctionEnv* fe) const {
   } else {
     throw std::runtime_error("RegVal::to_xmm NYI"); // todo
   }
+}
+
+const RegVal * IntegerConstantVal::to_reg(FunctionEnv* fe) const {
+  auto rv = fe->make_gpr(m_ts);
+  fe->emit(std::make_unique<IR_LoadConstant64>(rv, m_value));
+  return rv;
 }