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Auto merge of #14787 - HKalbasi:mir2, r=HKalbasi

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MIR episode 5

This PR inits drop support (it is very broken at this stage, some things are dropped multiple time, drop scopes are wrong, ...) and adds stdout support (`println!` doesn't work since its expansion is dummy, but `stdout().write(b"hello world\n")` works if you use `RA_SYSROOT_HACK`) for interpreting. There is no useful unit test that it can interpret yet, but it is a good sign that it didn't hit a major road block yet.

In MIR lowering, it adds support for slice pattern and anonymous const blocks, and some fixes so that we can evaluate `SmolStr::new_inline` in const eval. With these changes, 57 failed mir body remains.
This commit is contained in:
bors 2023-05-18 09:44:26 +00:00
commit 034d7c8537
36 changed files with 1529 additions and 357 deletions
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2
crates/hir-ty/src/layout.rs
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@ -148,7 +148,7 @@ pub fn layout_of_ty(db: &dyn HirDatabase, ty: &Ty, krate: CrateId) -> Result<Lay
cx.univariant(dl, &fields, &ReprOptions::default(), kind).ok_or(LayoutError::Unknown)?
}
TyKind::Array(element, count) => {
let count = try_const_usize(&count).ok_or(LayoutError::UserError(
let count = try_const_usize(db, &count).ok_or(LayoutError::UserError(
"unevaluated or mistyped const generic parameter".to_string(),
))? as u64;
let element = layout_of_ty(db, element, krate)?;