pass to insert a nop at start position in functions

1 files changed, 18 insertions, 0 deletions

diff --git a/backend/FirstNop.v b/backend/FirstNop.v
new file mode 100644
index 00000000..3d2211bc
--- /dev/null
+++ b/backend/FirstNop.v
@@ -0,0 +1,18 @@
+Require Import Coqlib Maps Errors Integers Floats Lattice Kildall.
+Require Import AST Linking.
+Require Import Memory Registers Op RTL.
+
+Definition transf_function (f: function) : function :=
+  let start_pc := max_pc_function f in
+  {| fn_sig := f.(fn_sig);
+     fn_params := f.(fn_params);
+     fn_stacksize := f.(fn_stacksize);
+     fn_code := PTree.set start_pc (Inop f.(fn_entrypoint)) f.(fn_code);
+     fn_entrypoint := start_pc |}.
+
+Definition transf_fundef (fd: fundef) : fundef :=
+  AST.transf_fundef transf_function fd.
+
+Definition transf_program (p: program) : program :=
+  transform_program transf_fundef p.
+