fix Windows build - signed int OMP for MSVC (#3517)

algoriddle · facebook-github-bot · commit e65a910eb47e · 2024-06-14T13:00:05.000-07:00
Summary: Pull Request resolved: #3517 MSVC doesn't support unsigned int for OMP Reviewed By: kuarora, junjieqi, ramilbakhshyiev Differential Revision: D58591594 fbshipit-source-id: ac7d6b37a82f9543be3e0fe418f0f6b439751475
diff --git 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];
         }
     }

Original file line number	Diff line number	Diff line change
`@@ -468,7 +468,7 @@ void IndexHNSW::search_level_0(`
`468`	`468`	`if (is_similarity_metric(this->metric_type)) {`
`469`	`469`	`// we need to revert the negated distances`
`470`	`470`	`#pragma omp parallel for`
`471`		`- for (size_t i = 0; i < k * n; i++) {`
	`471`	`+ for (int64_t i = 0; i < k * n; i++) {`
`472`	`472`	`distances[i] = -distances[i];`
`473`	`473`	`}`
`474`	`474`	`}`