compiler/rustc_codegen_cranelift/src/optimize/mod.rs

   1 //! Various optimizations specific to cg_clif
   2
   3 use crate::prelude::*;
   4
   5 mod code_layout;
   6 pub(crate) mod peephole;
   7 mod stack2reg;
   8
   9 pub(crate) fn optimize_function<'tcx>(
  10     tcx: TyCtxt<'tcx>,
  11     instance: Instance<'tcx>,
  12     ctx: &mut Context,
  13     cold_blocks: &EntitySet<Block>,
  14     clif_comments: &mut crate::pretty_clif::CommentWriter,
  15 ) {
  16     // The code_layout optimization is very cheap.
  17     self::code_layout::optimize_function(ctx, cold_blocks);
  18
  19     if tcx.sess.opts.optimize == rustc_session::config::OptLevel::No {
  20         return; // FIXME classify optimizations over opt levels
  21     }
  22
  23     // FIXME(#1142) stack2reg miscompiles lewton
  24     if false {
  25         self::stack2reg::optimize_function(ctx, clif_comments);
  26     }
  27
  28     crate::pretty_clif::write_clif_file(tcx, "stack2reg", None, instance, &ctx, &*clif_comments);
  29     crate::base::verify_func(tcx, &*clif_comments, &ctx.func);
  30 }