Implement CodeModel

Author: sapir

src/base.rs

@@ -129,8 +129,19 @@ pub fn compile_codegen_unit(
 // NOTE: Rust relies on LLVM doing wrapping on overflow.
  context.add_command_line_option("-fwrapv");
 
+ifletSome(model) = tcx.sess.code_model(){
+use rustc_target::spec::CodeModel;
+
+ context.add_command_line_option(match model {
+CodeModel::Tiny => "-mcmodel=tiny",
+CodeModel::Small => "-mcmodel=small",
+CodeModel::Kernel => "-mcmodel=kernel",
+CodeModel::Medium => "-mcmodel=medium",
+CodeModel::Large => "-mcmodel=large",
+});
+}
+
 if tcx.sess.relocation_model() == rustc_target::spec::RelocModel::Static{
- context.add_command_line_option("-mcmodel=kernel");
  context.add_command_line_option("-fno-pie");
 }