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authorGriffin Smith <grfn@gws.fyi>2021-03-28T17·28-0400
committerglittershark <grfn@gws.fyi>2021-03-28T17·33+0000
commit8e13b1303a0d152c2f3b68f2421163e94fdf226c (patch)
tree0cac0fee2cd52f912bb118cff78fdca9d28ac895 /users/glittershark/achilles/src/compiler.rs
parentdb62866d820cf524b67cebe34033d3928804cf3c (diff)
feat(achilles): Implement a Unit type r/2356
Add support for a zero-sized Unit type. This requires some special at
the codegen level because LLVM (unsurprisingly) only allows Void types
in function return position - to make that a little easier to handle
there's a new pass that strips any unit-only expressions and pulls
unit-only function arguments up to new `let` bindings, so we never have
to actually pass around unit values.

Change-Id: I0fc18a516821f2d69172c42a6a5d246b23471e38
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2695
Reviewed-by: glittershark <grfn@gws.fyi>
Tested-by: BuildkiteCI
Diffstat (limited to 'users/glittershark/achilles/src/compiler.rs')
-rw-r--r--users/glittershark/achilles/src/compiler.rs5
1 files changed, 3 insertions, 2 deletions
diff --git a/users/glittershark/achilles/src/compiler.rs b/users/glittershark/achilles/src/compiler.rs
index 7001e5a9a384..45b215473d7f 100644
--- a/users/glittershark/achilles/src/compiler.rs
+++ b/users/glittershark/achilles/src/compiler.rs
@@ -8,7 +8,7 @@ use test_strategy::Arbitrary;
 
 use crate::codegen::{self, Codegen};
 use crate::common::Result;
-use crate::passes::hir::monomorphize;
+use crate::passes::hir::{monomorphize, strip_positive_units};
 use crate::{parser, tc};
 
 #[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, Arbitrary)]
@@ -55,9 +55,10 @@ pub struct CompilerOptions {
 
 pub fn compile_file(input: &Path, output: &Path, options: &CompilerOptions) -> Result<()> {
     let src = fs::read_to_string(input)?;
-    let (_, decls) = parser::toplevel(&src)?; // TODO: statements
+    let (_, decls) = parser::toplevel(&src)?;
     let mut decls = tc::typecheck_toplevel(decls)?;
     monomorphize::run_toplevel(&mut decls);
+    strip_positive_units::run_toplevel(&mut decls);
 
     let context = codegen::Context::create();
     let mut codegen = Codegen::new(