Pointer Tagging

[ghc-hetmet.git] / compiler / codeGen / CgHeapery.lhs

diff --git a/compiler/codeGen/CgHeapery.lhs b/compiler/codeGen/CgHeapery.lhs
index 3bba211..b89452e 100644 (file)
--- a/compiler/codeGen/CgHeapery.lhs
+++ b/compiler/codeGen/CgHeapery.lhs
@@ -288,6 +288,9 @@ hpStkCheck cl_info is_fun reg_save_code code
        = noStmts
        | otherwise
        = oneStmt (CmmAssign nodeReg (CmmLit (CmmLabel closure_lbl)))
+        -- Strictly speaking, we should tag node here.  But if
+        -- node doesn't point to the closure, the code for the closure
+        -- cannot depend on the value of R1 anyway, so we're safe.
     closure_lbl = closureLabelFromCI cl_info
 
     full_save_code = node_asst `plusStmts` reg_save_code