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Rollup merge of #40336 - alexcrichton:fast-dep-info, r=nrc
rustc: Exit quickly on only `--emit dep-info` This commit alters the compiler to exit quickly if the only output being emitted is `dep-info`, which doesn't need a lot of other information to generate. Closes #40328
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commit
2b1d1bbf2a
@ -125,6 +125,10 @@ pub fn compile_input(sess: &Session,
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};
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write_out_deps(sess, &outputs, &crate_name);
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if sess.opts.output_types.contains_key(&OutputType::DepInfo) &&
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sess.opts.output_types.keys().count() == 1 {
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return Ok(())
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}
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let arena = DroplessArena::new();
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let arenas = GlobalArenas::new();
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4
src/test/run-make/dep-info-doesnt-run-much/Makefile
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4
src/test/run-make/dep-info-doesnt-run-much/Makefile
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@ -0,0 +1,4 @@
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-include ../tools.mk
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all:
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$(RUSTC) foo.rs --emit dep-info
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15
src/test/run-make/dep-info-doesnt-run-much/foo.rs
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15
src/test/run-make/dep-info-doesnt-run-much/foo.rs
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@ -0,0 +1,15 @@
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// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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// We're only emitting dep info, so we shouldn't be running static analysis to
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// figure out that this program is erroneous.
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fn main() {
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let a: u8 = "a";
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}
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