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authorVincent Ambo <mail@tazj.in>2022-08-28T14·28+0300
committertazjin <tazjin@tvl.su>2022-09-06T14·58+0000
commit025a9a4a0a66c8593cd6b7e4b0f0fa7aea84c353 (patch)
treee7a6921ebafcdd65c87394f58e9c1614f65eb79c /tvix/eval/src/vm.rs
parent1bfe32f4129a1c8627a254fe0fefe18d15339d83 (diff)
feat(tvix/eval): implement OpFinalise instruction r/4667
This instruction finalises the initialisation of deferred upvalues in
closures (and soon, thunks).

The compiler does not yet emit this instruction, some more accounting
is needed for that.

Change-Id: Ic4181b26e19779e206f51e17388559400da5f93a
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6337
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>
Diffstat (limited to 'tvix/eval/src/vm.rs')
-rw-r--r--tvix/eval/src/vm.rs13
1 files changed, 13 insertions, 0 deletions
diff --git a/tvix/eval/src/vm.rs b/tvix/eval/src/vm.rs
index d4eb0657251a..1aaba9b0573e 100644
--- a/tvix/eval/src/vm.rs
+++ b/tvix/eval/src/vm.rs
@@ -435,6 +435,19 @@ impl VM {
                     }
                 }
 
+                OpCode::OpFinalise(StackIdx(idx)) => {
+                    match &self.stack[self.frame().stack_offset + idx] {
+                        Value::Closure(closure) => closure
+                            .resolve_deferred_upvalues(&self.stack[self.frame().stack_offset..]),
+
+                        v => {
+                            #[cfg(feature = "disassembler")]
+                            drop(tracer);
+                            panic!("compiler error: invalid finaliser value: {}", v);
+                        }
+                    }
+                }
+
                 // Data-carrying operands should never be executed,
                 // that is a critical error in the VM.
                 OpCode::DataLocalIdx(_)