4 is already an offset

thun/asm-dump.txt

@@ -5,7 +5,7 @@ label(A),
 mov_imm(0, 0),
 store_word(0, 0, 0),
 mov_imm(0, 4096),
-mov_imm(1, B2),
+mov_imm(1, Z1),
 mov_imm(2, 0),
 mov_imm(3, 0),
 store_word(2, 0, 0),
@@ -233,57 +233,47 @@ eq_offset(Q1),
 sub(9, 9, 0),
 and_imm(9, 9, 32767),
 label(Q1),
-sub_imm(6, 6, 0),
-eq_offset(R1),
-sub(6, 6, 0),
-and_imm(6, 6, 32767),
-label(R1),
 lsl_imm(9, 9, 15),
 ior(9, 9, 6),
 store_word(9, 0, 0),
 do_offset(H),
+label(R1),
+symbol(R1),
+mov_imm(2, S1),
+do_offset(U1),
 label(S1),
-symbol(S1),
-mov_imm(2, T1),
-do_offset(V1),
-label(T1),
 expr_cell(I1, 4),
 expr_cell(J, 0),
-label(U1),
-symbol(U1),
-mov_imm(2, W1),
-do_offset(V1),
-label(W1),
+label(T1),
+symbol(T1),
+mov_imm(2, V1),
+do_offset(U1),
+label(V1),
 expr_cell(R, 4),
 expr_cell(S, 0),
+label(W1),
+symbol(W1),
+mov_imm(2, X1),
+do_offset(U1),
 label(X1),
-symbol(X1),
-mov_imm(2, Y1),
-do_offset(V1),
-label(Y1),
 expr_cell(J1, 4),
 expr_cell(J, 0),
-label(V1),
+label(U1),
 mov_imm(7, 4),
 sub_imm(0, 0, 4),
 sub_imm(2, 2, 0),
-eq_offset(Z1),
+eq_offset(Y1),
 sub(2, 2, 0),
 and_imm(2, 2, 32767),
-label(Z1),
-sub_imm(7, 7, 0),
-eq_offset(A2),
-sub(7, 7, 0),
-and_imm(7, 7, 32767),
-label(A2),
+label(Y1),
 lsl_imm(2, 2, 15),
 ior(2, 2, 7),
 store_word(2, 0, 0),
 mov_imm(7, S),
 add_imm(7, 7, 4),
 do(7),
-label(B2),
+label(Z1),
 expr_cell(I1, 4),
 expr_cell(R, 4),
-expr_cell(X1, 4),
+expr_cell(W1, 4),
 expr_cell(S, 0)].

thun/compiler.markII.pl

@@ -165,7 +165,8 @@ Mark II
     sub_base_merge_and_store(TEMP0, TEMP4, SP),  % Push first item onto stack.
     asm(mov_imm(TEMP0, 4)),  % Used for linking to previous cell.
     incr(SP),
-    sub_base_merge_and_store(TEMP3, TEMP0, SP),  % Push first item onto stack.
+    sub_base_from_offset(TEMP3, SP),
+    merge_and_store(TEMP3, TEMP0, SP),  % Push second item onto stack.
     jump(Main),
 
     definition(Unit, [New, Cons], DoDef, TOS),
@@ -175,7 +176,8 @@ Mark II
     label(DoDef),  % TOS points to body expr, set by definition.
     asm(mov_imm(TEMP1, 4)),  % Used for linking to previous cell.
     incr(SP),
-    sub_base_merge_and_store(TOS, TEMP1, SP),  % Push body expr onto stack.
+    sub_base_from_offset(TOS, SP),
+    merge_and_store(TOS, TEMP1, SP),  % Push body expr onto stack.
     asm(mov_imm(TEMP1, I)),  % Get address of I's machine code.
     asm(add_imm(TEMP1, TEMP1, 4)),
     asm(do(TEMP1)),