From 7c2d8905a3a3baeb96bacded357bdc553ea93657 Mon Sep 17 00:00:00 2001
From: Gergely Szilvasy <gsz@meta.com>
Date: Fri, 14 Jun 2024 09:49:49 -0700
Subject: [PATCH] fix Windows build - signed int OMP for MSVC

Summary: MSVC doesn't support unsigned int for OMP

Reviewed By: junjieqi

Differential Revision: D58591594
---
 faiss/IndexHNSW.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/faiss/IndexHNSW.cpp b/faiss/IndexHNSW.cpp
index fd80b87df7..8e5c654f04 100644
--- a/faiss/IndexHNSW.cpp
+++ b/faiss/IndexHNSW.cpp
@@ -468,7 +468,7 @@ void IndexHNSW::search_level_0(
     if (is_similarity_metric(this->metric_type)) {
 // we need to revert the negated distances
 #pragma omp parallel for
-        for (size_t i = 0; i < k * n; i++) {
+        for (int64_t i = 0; i < k * n; i++) {
             distances[i] = -distances[i];
         }
     }