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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:20:29 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:20:29 +0000 |
commit | 631cd5845e8de329d0e227aaa707d7ea228b8f8f (patch) | |
tree | a1b87c8f8cad01cf18f7c5f57a08f102771ed303 /tests/run-make/pgo-use/main.rs | |
parent | Adding debian version 1.69.0+dfsg1-1. (diff) | |
download | rustc-631cd5845e8de329d0e227aaa707d7ea228b8f8f.tar.xz rustc-631cd5845e8de329d0e227aaa707d7ea228b8f8f.zip |
Merging upstream version 1.70.0+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tests/run-make/pgo-use/main.rs')
-rw-r--r-- | tests/run-make/pgo-use/main.rs | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/tests/run-make/pgo-use/main.rs b/tests/run-make/pgo-use/main.rs new file mode 100644 index 000000000..eb9192c87 --- /dev/null +++ b/tests/run-make/pgo-use/main.rs @@ -0,0 +1,23 @@ +#[no_mangle] +pub fn cold_function(c: u8) { + println!("cold {}", c); +} + +#[no_mangle] +pub fn hot_function(c: u8) { + std::env::set_var(format!("var{}", c), format!("hot {}", c)); +} + +fn main() { + let arg = std::env::args().skip(1).next().unwrap(); + + for i in 0 .. 1000_000 { + let some_value = arg.as_bytes()[i % arg.len()]; + if some_value == b'!' { + // This branch is never taken at runtime + cold_function(some_value); + } else { + hot_function(some_value); + } + } +} |