Remove AddCallGuards. It's useless for Miri.

Author: solson

src/interpreter/mod.rs

@@ -988,12 +988,9 @@ pub fn run_mir_passes<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>, mir_map: &mut MirMa
 
     passes.push_pass(Box::new(::rustc_mir::transform::erase_regions::EraseRegions));
 
-    passes.push_pass(Box::new(::rustc_mir::transform::add_call_guards::AddCallGuards));
     passes.push_pass(Box::new(::rustc_borrowck::ElaborateDrops));
     passes.push_pass(Box::new(::rustc_mir::transform::no_landing_pads::NoLandingPads));
     passes.push_pass(Box::new(::rustc_mir::transform::simplify_cfg::SimplifyCfg::new("elaborate-drops")));
-
-    passes.push_pass(Box::new(::rustc_mir::transform::add_call_guards::AddCallGuards));
     passes.push_pass(Box::new(::rustc_mir::transform::dump_mir::Marker("PreMiri")));
 
     passes.run_passes(tcx, mir_map);