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add support for the cold function attribute

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This allows a function to marked as infrequently called, resulting in
any branch calling it to be considered colder.
This commit is contained in:
Daniel Micay 2013-10-20 23:13:48 -04:00
parent d664ca2635
commit 541e5f84d7
6 changed files with 23 additions and 6 deletions
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2
src/libstd/unstable/lang.rs
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@ -16,11 +16,13 @@ use libc::{c_char, size_t, uintptr_t};
use rt::task;
use rt::borrowck;
#[cold]
#[lang="fail_"]
pub fn fail_(expr: *c_char, file: *c_char, line: size_t) -> ! {
task::begin_unwind(expr, file, line);
}
#[cold]
#[lang="fail_bounds_check"]
pub fn fail_bounds_check(file: *c_char, line: size_t, index: size_t, len: size_t) -> ! {
let msg = format!("index out of bounds: the len is {} but the index is {}",