[PATCH] D83428: [flang] Fix negative unit number hashing

[Peter Klausler via Phabricator via llvm-commits]

This revision was automatically updated to reflect the committed changes.
Closed by commit rGcffc6036173d: [flang] Fix negative unit number hashing (authored by klausler).

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D83428/new/

https://reviews.llvm.org/D83428

Files:
  flang/runtime/unit-map.h


Index: flang/runtime/unit-map.h
===================================================================
--- flang/runtime/unit-map.h
+++ flang/runtime/unit-map.h
@@ -15,6 +15,7 @@
 #include "lock.h"
 #include "memory.h"
 #include "unit.h"
+#include <cstdlib>
 
 namespace Fortran::runtime::io {
 
@@ -59,7 +60,7 @@
   };
 
   static constexpr int buckets_{1031}; // must be prime
-  int Hash(int n) { return n % buckets_; }
+  int Hash(int n) { return std::abs(n) % buckets_; }
 
   ExternalFileUnit *Find(int n) {
     Chain *previous{nullptr};


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