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Add a test to prevent x64 Inst size slipping further (#4489)

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* Add a test to prevent x64 Inst size slipping further

* Enable the test for 64-bit pointers only
This commit is contained in:
Trevor Elliott
2022-07-20 17:01:33 -07:00
committed by GitHub
parent bdaaaee21e
commit 06407dd337
1 changed files with 8 additions and 0 deletions
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8
cranelift/codegen/src/isa/x64/inst/mod.rs
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@@ -43,6 +43,14 @@ pub struct CallInfo {
pub opcode: Opcode, pub opcode: Opcode,
} }
#[test]
#[cfg(target_pointer_width = "64")]
fn inst_size_test() {
// This test will help with unintentionally growing the size
// of the Inst enum.
assert_eq!(72, std::mem::size_of::<Inst>());
}
pub(crate) fn low32_will_sign_extend_to_64(x: u64) -> bool { pub(crate) fn low32_will_sign_extend_to_64(x: u64) -> bool {
let xs = x as i64; let xs = x as i64;
xs == ((xs << 32) >> 32) xs == ((xs << 32) >> 32)