From b89dd05b54137f194c7a327396245fdaad9e2b9c Mon Sep 17 00:00:00 2001
From: Kimish Patel <kimishpatel@fb.com>
Date: Thu, 10 Jul 2025 11:33:07 -0700
Subject: [PATCH] When replacing literals with placeholders lists are always
 converted to tuples

Summary:
THis is needed because lists are not hashable, since they are mutable,
and as a result we cannot have literals_to_ph in pattern rewrites used
inside reference_representation_rewrite.py

Test Plan:
CI + next diff relies on this feature

Reviewers:

Subscribers:

Tasks:

Tags:

[ghstack-poisoned]
---
 torchao/quantization/pt2e/utils.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/torchao/quantization/pt2e/utils.py b/torchao/quantization/pt2e/utils.py
index dc5f802fb8..114f6b0ab4 100644
--- a/torchao/quantization/pt2e/utils.py
+++ b/torchao/quantization/pt2e/utils.py
@@ -1031,6 +1031,8 @@ def replacement(x_i8, scale, zero_point, quant_min, quant_max):
             continue
         new_args = []
         for arg in node.args:
+            if isinstance(arg, list):
+                arg = tuple(arg)  # type: ignore[assignment]
             if (
                 _is_literal(arg)
                 and arg not in exclude_literals