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| author | Ariel Ben-Yehuda <arielb1@mail.tau.ac.il> | 2016-02-07 22:46:39 +0200 |
|---|---|---|
| committer | Ariel Ben-Yehuda <ariel.byd@gmail.com> | 2016-02-20 01:38:27 +0200 |
| commit | 999f1767caeb62a60278ae5afd9191dfbbd6ef18 (patch) | |
| tree | 9eeb51bcded945389e162dcad5ff600e12108456 /src | |
| parent | addc653da5fa6d0541c445f32350d95d84f3de57 (diff) | |
| download | rust-999f1767caeb62a60278ae5afd9191dfbbd6ef18.tar.gz rust-999f1767caeb62a60278ae5afd9191dfbbd6ef18.zip | |
add -Z mir-opt-level to disable MIR optimizations
setting -Z mir-opt-level=0 will disable all MIR optimizations for easier debugging
Diffstat (limited to 'src')
| -rw-r--r-- | src/librustc/session/config.rs | 6 | ||||
| -rw-r--r-- | src/librustc_mir/mir_map.rs | 5 |
2 files changed, 9 insertions, 2 deletions
diff --git a/src/librustc/session/config.rs b/src/librustc/session/config.rs index 864ff40fe10..f835613cfcb 100644 --- a/src/librustc/session/config.rs +++ b/src/librustc/session/config.rs @@ -138,6 +138,7 @@ pub struct Options { pub no_trans: bool, pub error_format: ErrorOutputType, pub treat_err_as_bug: bool, + pub mir_opt_level: usize, /// if true, build up the dep-graph pub build_dep_graph: bool, @@ -254,6 +255,7 @@ pub fn basic_options() -> Options { parse_only: false, no_trans: false, treat_err_as_bug: false, + mir_opt_level: 1, build_dep_graph: false, dump_dep_graph: false, no_analysis: false, @@ -655,6 +657,8 @@ options! {DebuggingOptions, DebuggingSetter, basic_debugging_options, "show spans for compiler debugging (expr|pat|ty)"), print_trans_items: Option<String> = (None, parse_opt_string, "print the result of the translation item collection pass"), + mir_opt_level: Option<usize> = (None, parse_opt_uint, + "set the MIR optimization level (0-3)"), } pub fn default_lib_output() -> CrateType { @@ -988,6 +992,7 @@ pub fn build_session_options(matches: &getopts::Matches) -> Options { let parse_only = debugging_opts.parse_only; let no_trans = debugging_opts.no_trans; let treat_err_as_bug = debugging_opts.treat_err_as_bug; + let mir_opt_level = debugging_opts.mir_opt_level.unwrap_or(1); let incremental_compilation = debugging_opts.incr_comp; let dump_dep_graph = debugging_opts.dump_dep_graph; let no_analysis = debugging_opts.no_analysis; @@ -1166,6 +1171,7 @@ pub fn build_session_options(matches: &getopts::Matches) -> Options { parse_only: parse_only, no_trans: no_trans, treat_err_as_bug: treat_err_as_bug, + mir_opt_level: mir_opt_level, build_dep_graph: incremental_compilation || dump_dep_graph, dump_dep_graph: dump_dep_graph, no_analysis: no_analysis, diff --git a/src/librustc_mir/mir_map.rs b/src/librustc_mir/mir_map.rs index 7a2b90fbbb3..58b6d69ba5c 100644 --- a/src/librustc_mir/mir_map.rs +++ b/src/librustc_mir/mir_map.rs @@ -148,10 +148,11 @@ impl<'a, 'm, 'tcx> Visitor<'tcx> for InnerDump<'a,'m,'tcx> { match build_mir(Cx::new(&infcx), implicit_arg_tys, id, span, decl, body) { Ok(mut mir) => { - simplify_cfg::SimplifyCfg::new().run_on_mir(&mut mir, self.tcx); type_check::TypeckMir::new(&infcx).run_on_mir(&mut mir, self.tcx); no_landing_pads::NoLandingPads.run_on_mir(&mut mir, self.tcx); - + if self.tcx.sess.opts.mir_opt_level > 0 { + simplify_cfg::SimplifyCfg::new().run_on_mir(&mut mir, self.tcx); + } let meta_item_list = self.attr .iter() .flat_map(|a| a.meta_item_list()) |