4548: start of a compiler for a new experimental low-level language

1 files changed, 27 insertions, 0 deletions

diff --git a/transect/compiler2 b/transect/compiler2
new file mode 100644
index 00000000..5c06cc4f
--- /dev/null
+++ b/transect/compiler2
@@ -0,0 +1,27 @@
+to dereference a heap allocation
+  copy handle to stack
+  perform lookup to stack
+
+lookup x in *(ESP+4) of type (handle T)
+
+  reg <- copy *(ESP+5) : (address T stack)
+  payload alloc id <- copy *reg
+  address alloc id <- copy *(ESP+4)
+  compare payload alloc id, address alloc id
+  jump if not equal to print stack trace and panic
+  address <- add reg, 1
+
+types:
+
+  address T reg
+  address T stack
+  address T heap
+  address T global
+
+copy down this spectrum is not permitted, but up is.
+
+addresses aren't allowed in types, globals and on the heap. Only handles.
+addresses are only for temporary manipulations.
+
+
+*(address T) <- copy T