change text format for invoke

vyper/venom/basicblock.py

@@ -384,9 +384,11 @@ def __repr__(self) -> str:
         opcode = f"{self.opcode} " if self.opcode != "store" else ""
         s += opcode
         operands = self.operands
-        if self.opcode not in ("jmp", "jnz", "invoke", "phi"):
-            # TODO: for invoke, maybe reverse the non-label instructions
+        if self.opcode == "invoke":
+            operands = [operands[0]] + list(reversed(operands[1:]))
+        elif self.opcode not in ("jmp", "jnz", "phi"):
             operands = reversed(operands)  # type: ignore
+
         s += ", ".join([(f"@{op}" if isinstance(op, IRLabel) else str(op)) for op in operands])
 
         if self.annotation:

vyper/venom/parser.py

@@ -161,8 +161,12 @@ def instruction(self, children) -> IRInstruction:
 
         # reverse operands, venom internally represents top of stack
         # as rightmost operand
-        if opcode not in ("jmp", "jnz", "invoke", "phi"):
-            # special cases: operands with labels look better un-reversed
+        if opcode == "invoke":
+            # reverse stack arguments but not label arg
+            # invoke <target> <stack arguments>
+            operands = [operands[0]] + list(reversed(operands[1:]))
+        # special cases: operands with labels look better un-reversed
+        elif opcode not in ("jmp", "jnz", "phi"):
             operands.reverse()
         return IRInstruction(opcode, operands)